bluuebunny/crossref_metadata_2025 huggingface dataset:
Forecasting standardized precipitation index using data intelligence models: regional investigation of Bangladesh
Authors: Yaseen Zaher Mundher , Ali Mumtaz , Sharafati Ahmad , Al-Ansari Nadhir , Shahid Shamsuddin
Published: February 2021

A noticeable increase in drought frequency and severity has been observed across the globe due to climate change, which attracted scientists in development of drought prediction models for mitigation of impacts. Droughts are usually monitored using drought indices (DIs), most of which are probabilistic and therefore, highly stochastic and non-linear. The current research investigated the capability of different versions of relatively well-explored machine learning (ML) models including random forest (RF), minimum probability machine regression (MPMR), M5 Tree (M5tree), extreme learning machine (ELM) and online sequential-ELM (OSELM) in predicting the most widely used DI known as standardized precipitation index (SPI) at multiple month horizons (i.e., 1, 3, 6 and 12). Models were developed using monthly rainfall data for the period of 1949–2013 at four meteorological stations namely, Barisal, Bogra, Faridpur and Mymensingh, each representing a geographical region of Bangladesh which frequently experiences droughts. The model inputs were decided based on correlation statistics and the prediction capability was evaluated using several statistical metrics including mean square error (MSE), root mean square error (RMSE), mean absolute error (MAE), correlation coefficient (R), Willmott’s Index of agreement (WI), Nash Sutcliffe efficiency (NSE), and Legates and McCabe Index (LM). The results revealed that the proposed models are reliable and robust in predicting droughts in the region. Comparison of the models revealed ELM as the best model in forecasting droughts with minimal RMSE in the range of 0.07–0.85, 0.08–0.76, 0.062–0.80 and 0.042–0.605 for Barisal, Bogra, Faridpur and Mymensingh, respectively for all the SPI scales except one-month SPI for which the RF showed the best performance with minimal RMSE of 0.57, 0.45, 0.59 and 0.42, respectively.
Estimation of three-dimensional chromatin morphology for nuclear classification and characterisation
Authors: Rana Priyanka , Sowmya Arcot , Meijering Erik , Song Yang
Published: February 2021

Classification and characterisation of cellular morphological states are vital for understanding cell differentiation, development, proliferation and diverse pathological conditions. As the onset of morphological changes transpires following genetic alterations in the chromatin configuration inside the nucleus, the nuclear texture as one of the low-level properties if detected and quantified accurately has the potential to provide insights on nuclear organisation and enable early diagnosis and prognosis. This study presents a three dimensional (3D) nuclear texture description method for cell nucleus classification and variation measurement in chromatin patterns on the transition to another phenotypic state. The proposed approach includes third plane information using hyperplanes into the design of the Sorted Random Projections (SRP) texture feature and is evaluated on publicly available 3D image datasets of human fibroblast and human prostate cancer cell lines obtained from the Statistics Online Computational Resource. Results show that 3D SRP and 3D Local Binary Pattern provide better classification results than other feature descriptors. In addition, the proposed metrics based on 3D SRP validate the change in intensity and aggregation of heterochromatin on transition to another state and characterise the intermediate and ultimate phenotypic states.
Persistent hepatocyte apoptosis promotes tumorigenesis from diethylnitrosamine-transformed hepatocytes through increased oxidative stress, independent of compensatory liver regeneration
Authors: Nozaki Yasutoshi , Hikita Hayato , Tanaka Satoshi , Fukumoto Kenji , Urabe Makiko , Sato Katsuhiko , Myojin Yuta , Doi Akira , Murai Kazuhiro , Sakane Sadatsugu , Saito Yoshinobu , Kodama Takahiro , Sakamori Ryotaro , Tatsumi Tomohide , Takehara Tetsuo
Published: February 2021

Hepatocellular carcinoma highly occurs in chronic hepatitis livers, where hepatocyte apoptosis is frequently detected. Apoptosis is a mechanism that eliminates mutated cells. Hepatocyte apoptosis induces compensatory liver regeneration, which is believed to contribute to tumor formation. Hepatocyte-specific Mcl-1 knockout mice (Mcl-1Δhep mice) developed persistent hepatocyte apoptosis and compensatory liver regeneration with increased oxidative stress in adulthood but had not yet developed hepatocyte apoptosis at the age of 2 weeks. When diethylnitrosamine (DEN) was administered to 2-week-old Mcl-1Δhep mice, multiple liver tumors were formed at 4 months, while wild-type mice did not develop any tumors. These tumors contained the B-Raf V637E mutation, indicating that DEN-initiated tumorigenesis was promoted by persistent hepatocyte apoptosis. When N-acetyl-L-cysteine was given from 6 weeks of age, DEN-administered Mcl-1Δhep mice had reduced oxidative stress and suppressed tumorigenesis in the liver but showed no changes in hepatocyte apoptosis or proliferation. In conclusion, enhanced tumor formation from DEN-transformed hepatocytes by persistent hepatocyte apoptosis is mediated by increased oxidative stress, independent of compensatory liver regeneration. For patients with livers harboring transformed cells, the control of oxidative stress may suppress hepatocarcinogenesis based on chronic liver injury.
Molecular mechanism and structural basis of small-molecule modulation of the gating of acid-sensing ion channel 1
Authors: Liu Yi , Ma Jichun , DesJarlais Renee L. , Hagan Rebecca , Rech Jason , Lin David , Liu Changlu , Miller Robyn , Schoellerman Jeffrey , Luo Jinquan , Letavic Michael , Grasberger Bruce , Maher Michael
Published: February 2021

Acid-sensing ion channels (ASICs) are proton-gated cation channels critical for neuronal functions. Studies of ASIC1, a major ASIC isoform and proton sensor, have identified acidic pocket, an extracellular region enriched in acidic residues, as a key participant in channel gating. While binding to this region by the venom peptide psalmotoxin modulates channel gating, molecular and structural mechanisms of ASIC gating modulation by small molecules are poorly understood. Here, combining functional, crystallographic, computational and mutational approaches, we show that two structurally distinct small molecules potently and allosterically inhibit channel activation and desensitization by binding at the acidic pocket and stabilizing the closed state of rat/chicken ASIC1. Our work identifies a previously unidentified binding site, elucidates a molecular mechanism of small molecule modulation of ASIC gating, and demonstrates directly the structural basis of such modulation, providing mechanistic and structural insight into ASIC gating, modulation and therapeutic targeting.
Author Correction: Voltage-independent GluN2A-type NMDA receptor Ca2+ signaling promotes audiogenic seizures, attentional and cognitive deficits in mice
Authors: Bertocchi Ilaria , Eltokhi Ahmed , Rozov Andrey , Chi Vivan Nguyễn , Jensen Vidar , Bus Thorsten , Pawlak Verena , Serafino Marta , Sonntag Hannah , Yang Boyi , Burnashev Nail , Li Shi-Bin , Obenhaus Horst A. , Both Martin , Niewoehner Burkhard , Single Frank N. , Briese Michael , Boerner Thomas , Gass Peter , Rawlins John Nick P. , Köhr Georg , Bannerman David M. , Sprengel Rolf
Published: February 2021

A Correction to this paper has been published: https://doi.org/10.1038/s42003-021-01717-x
Raman spectroscopy insights into the α- and δ-phases of formamidinium lead iodide (FAPbI3)
Authors: Driscoll E. H. , Orera A. , Anderson P. A. , Sanjuán M. L. , Slater P. R.
Published: February 2021

We report a detailed Raman study of the transformation δ → α FAPbI3 system, illustrating the α phase is Raman inactive.
Quick in situ generation of a quinone-enriched surface of N-doped carbon cloth electrodes for electric double-layer capacitors
Authors: Lv Xiaowei , Ji Shan , Lu Jun , Zhang Lei , Wang Xuyun , Wang Hui
Published: February 2021

A method of electro-oxidation was developed to engineer the surface features of the carbon cloth wrapped with a nitrogen-doped carbon layer, then to obtain a highly hydrophilic, carbon cloth electrode with plenty of quinone-containing sites.
Single-step synthesis and interface tuning of core–shell metal–organic framework nanoparticles
Authors: Orr Kieran W. P. , Collins Sean M. , Reynolds Emily M. , Nightingale Frank , Boström Hanna L. B. , Cassidy Simon J. , Dawson Daniel M. , Ashbrook Sharon E. , Magdysyuk Oxana V. , Midgley Paul A. , Goodwin Andrew L. , Yeung Hamish H.-M.
Published: February 2021

Core–shell metal–organic framework nanoparticles have been synthesised in which the internal interface and distribution of components is found to be highly tunable using simple variations in reaction conditions.
Electrophilic reactivities of cyclic enones and α,β-unsaturated lactones
Authors: Mayer Robert J. , Allihn Patrick W. A. , Hampel Nathalie , Mayer Peter , Sieber Stephan A. , Ofial Armin R.
Published: February 2021

Different reactivity trends for cyclic and acyclic Michael acceptors were found within the framework of Mayr's experimental reactivity scales and analyzed through quantum-chemical studies.
Methacrylamide based antibiotic polymers with no detectable bacterial resistance
Authors: Tyagi Anju , Mishra Abhijit
Published: February 2021

We report the synthesis of methacrylamide-based polymers with high antibacterial efficacy and selectivity. The polymers disrupt bacterial membranes and are less susceptible to the development of resistance in bacteria.
Immobilising giant unilamellar vesicles with zirconium metal–organic framework anchors
Authors: Jennings Christopher S. , Rossman Jeremy S. , Hourihan Braeden A. , Marshall Ross J. , Forgan Ross S. , Blight Barry A.
Published: February 2021

A straightforward procedure for immobilising giant unilamellar vesicles (GUVs) using zircomium metal-organic frameworks as the anchroing medium is presented. Using this method GUVs can be immoblised and visualised for hours.
Directing the far-from-equilibrium assembly of nanoparticles in confined liquid crystals by hydrodynamic fields
Authors: Villada-Gil Stiven , Palacio-Betancur Viviana , Armas-Pérez Julio C. , de Pablo Juan J. , Hernández-Ortiz Juan P.
Published: February 2021

The assembly of nematic colloids relies on long-range elastic interactions that can be manipulated through external stimuli.
A paper-based colorimetric chemosensor for rapid and highly sensitive detection of sulfide for environmental monitoring
Authors: Thai Duc Anh , Lee Nae Yoon
Published: February 2021

A paper-based colorimetric chemosensor is developed for highly rapid, selective, and sensitive detection of sulfide in water.
Confidence and Training of Speech-Language Pathologists in Cognitive-Communication Disorders: Time to Rethink Graduate Education Models?
Authors: Morrow Emily L. , Turkstra Lyn S. , Duff Melissa C.
Published: February 2021

Purpose

The purpose of this article is to highlight the need for increased focus on cognitive communication in North American speech-language pathology graduate education models.

Method

We describe key findings from a recent survey of acute care speech-language pathologists (SLPs) in the United States and expand upon the ensuing discussion at the 2020 International Cognitive-Communication Disorders Conference to consider some of the specific challenges of training for cognitive communication and make suggestions for rethinking how to prepare future clinicians to manage cognitive-communication disorders.

Results

Results from the survey of acute care SLPs indicated inconsistent confidence and training in managing cognitive-communication disorders. We discuss the pros and cons of several avenues for improving the consistency of cognitive-communication training, including a standalone cognitive-communication course, integrating cognitive communication in all courses across the speech-language pathology undergraduate and graduate curriculum, and using problem-based learning frameworks to better prepare students as independent thinkers in the area of cognitive communication and beyond.

Conclusions

Cognitive-communication disorders cut across clinical diagnoses and settings and are one of the largest and fastest growing parts of the SLP's scope of practice. Yet, surveys, including the one discussed here, have repeatedly indicated that SLPs do not feel prepared or confident to work with individuals with cognitive-communication disorders. We propose several avenues for increasing educational emphasis on cognitive communication. We hope these ideas will generate discussion and guide decision making to empower SLPs to think critically and step confidently into their roles as leaders in managing the heterogeneous and ever-growing populations of individuals with cognitive-communication disorders.
Heterogeneity Is a Hallmark of Traumatic Brain Injury, Not a Limitation: A New Perspective on Study Design in Rehabilitation Research
Authors: Covington Natalie V. , Duff Melissa C.
Published: February 2021

Purpose

In both basic science and intervention research in traumatic brain injury (TBI), heterogeneity in the patient population is frequently cited as a limitation and is often interpreted as a factor reducing certainty in the generalizability of research findings and as a source of conflicting findings across studies. Historically, much of TBI research in rehabilitation and cognition has relied upon case–control studies, with small to modest sample sizes. In this context, heterogeneity is indeed a significant limitation. Here, however, we argue that heterogeneity in patient profiles is a hallmark characteristic of TBI and therefore cannot be avoided or ignored. We argue that this inherent heterogeneity must be acknowledged and accounted for prior to study design. Fortunately, advances in statistical methods and computing power allow researchers to leverage heterogeneity, rather than be constrained by it.

Method

In this article, we review sources of heterogeneity that contribute to challenges in TBI research, highlight methodological advances in statistical analysis and in other fields with high degrees of heterogeneity (e.g., psychiatry) that may be fruitfully applied to decomposing heterogeneity in TBI, and offer an example from our research group incorporating this approach.

Conclusion

Only by adopting new methodological approaches can we advance the science of rehabilitation following TBI in ways that will impact clinical practice and inform decision making, allowing us to understand and respond to the range of individual differences that are a hallmark in this population.
The Combined Burden of Hearing Loss and Cognitive Impairment in a Group Care Setting for Older Adults
Authors: Mamo Sara K. , Wheeler Kara A.
Published: February 2021

Purpose

The purpose of the current study is to better characterize the medical and social health characteristics of older adults in a long-term group care setting and consider the impact of the dual burden of hearing loss and cognitive impairment.

Method

This descriptive analysis of a convenience sample of 160 adults (
M
age
= 74 years, age range: 59.8–99.7) participating in Program for All-inclusive Care for the Elderly programs in Massachusetts and Rhode Island included data from hearing testing, questionnaires, and medical chart review. Using descriptive statistics, groups are compared across a range of demographic and health variables on the categorical bases of hearing loss and cognitive status.

Results

Results suggest that hearing loss and cognitive impairment are highly prevalent among this sample of older adults. Forty-three percent of this sample has at least a mild hearing loss in the better hearing ear in addition to cognitive impairment. Descriptive analyses across demographic and health variables suggest there are few differences between those with and without cognitive impairment when compared within degree of hearing loss categories in this convenience sample. Across all participants, there was a high prevalence of other chronic conditions, most notably diabetes (59%), hypertension (90%), cardiovascular disease (80%), and depression (67%).

Conclusions

In this sample, there were not significant differences on demographic and health variables between the cognitive impairment groups when considered within their degree of hearing loss; however, the prevalence of the dual burden of hearing loss and cognitive impairment in this sample is high. Clinicians serving older adults, especially those accessing group care services, should be cognizant of the high burden of multiple chronic conditions and plan care that can be integrated into a comprehensive approach.
Numerical simulation of combustion distribution in a gas burner
Authors: Bao Ming , Lin Jiming
Published: February 2021

The combustion effect of natural gas-air mixed combustion is optimised through an effective and rational design of the burner structure, thereby reducing the emission of atmospheric pollutants and achieving energy saving and emission reduction. This paper starts from the geometric model of the burner and uses Computational Fluid Dynamics (CFD) technology to numerically simulate the combustion distribution in the burner, which results in the combustion distribution of the burner after optimising the structure. The guiding effect of the blower guide vanes on the airflow is weak, and the back pressure effect of the guide vanes mounting body is significant, which reduces the primary air volume and prolongs the combustion history in the central region of the flame; The temperature field is evenly distributed and the combustion is well distributed; CH4 and CO in the furnace chamber are basically burned out and the NO concentration in the furnace chamber is about 800 ppm, which basically meets the emission standard and the combustion effect is good. This paper has certain guiding significance for the study of burner structure.
Single well control area splitting method based on reservoir sphysical properties and gas well productivity differences
Authors: Chunpu Wang
Published: February 2021

The determination of the control area of a single well is the prerequisite for the evaluation of the reserves of a single well. The current calculation methods of the control area of a single well are mainly divided into: experience formula, area balancing method, and the physical model, in order to solve the different limitations of the existing single-well control area splitting method and the problem of large error in use, this paper puts forward a kind of based on gas reservoir physical property and the growth of single well productivity difference algorithm for single well control area is split, according to the results of the split combining static reservoir parameters, using volumetric method for single well and the calculation of
reserves of gas reservoir evaluation, further clarify the original and the remaining gas distribution of gas reservoir, for the subsequent reasonable development of the gas reservoir and enhance oil recovery. In this paper, block S of Sulige gas field is taken as an example, and the geological reserve of block is calculated as 354.75×108m3, compared with the basic proven reserves of Block S, 364.84×108m3, the error is 2.61% and the reliability is strong
The state evaluation method of distribution switch cabinet based on improved matter-element extension
Authors: Sun YuTao , Song Jianbo , Guo Heng , Song Li , Li Jiahui , Wang Zhe
Published: February 2021

In this paper, a matter-element extenics method is adopted to combine the information of each layer and each eigenvalue, so as to realize the evaluation of the current state of switch cabinet. The calculation of correlation degree is improved in the traditional matter-element extenics method. And the actual evaluation effect is optimized. This paper illustrates the evaluation process with practical examples, and compares the current evaluation results with the actual status of switch cabinets and the evaluation results obtained by traditional matter-element extension method. They proved the advance and effectiveness of the proposed method.
Research on Investment Trend of Distribution Network Based on Support Vector Machine
Authors: Wang Chao , Zhang Jiyuan , Jian Yaling , Jiao Jie , Yang Xi , Yu Guangxiu , Du Le
Published: February 2021

Under the new situation, with the continuous development of my country's economy and the implementation of power system reforms, higher development requirements have been put forward for the distribution network investment plan. Through the scientific and reasonable calculation of the investment scale of the distribution network, optimizing the investment scale of the distribution network and rationally arranging the investment planning of the distribution network project have become one of the key concerns of the current power grid enterprises. This paper uses fishbone diagram theory to analyze the factors that affect the investment scale of the distribution network, and selects the key factor indicators to construct a distribution network investment trend prediction model based on support vector machines. By selecting a certain region's distribution network investment for empirical forecasting analysis, and comparing with the planned investment of the distribution network in the region, the validity of the model is verified.
Engineering Practice of Ultra-high Pressure Hydraulic Slotting and Pressure Relief Pumping in Through Layer Hole
Authors: Li Siqian
Published: February 2021

In order to solve the problems of low gas drainage rate and long drainage time in thick coal seam with low permeability, ultra-high pressure hydraulic slotting pressure relief and permeability enhancement technology was applied in the test. The practice shows that after adopting the ultra-high pressure hydraulic slotting, the gas drainage rate is greatly improved, the time for reaching the standard of drainage is shortened, and the difficult problem of gas control in the mining face of thick coal seam is solved, which provides technical guidance for high-efficiency gas control in thick coal seam with similar conditions in mining area.
Thermal demand response model considering user's satisfaction with heat consumption under electrothermal coupling
Authors: Zhenyu Wang , Jianhua Zhang , Chunlan Hu , Lanlan Xu , Yongjun Han
Published: February 2021

.In recent years, the development of new energy has become a bottleneck. As a high-quality demand side response resource that can be flexibly dispatched, thermal load can be used to promote the consumption and utilization of new energy. Based on the theory of peak valley electricity price and power demand response mechanism, this paper designs a demand response model of thermal price type, which uses time-sharing heat price to guide users to use heat orderly on the heating side. The simulation results show that the reasonable setting of heat price and satisfaction constraints of different heating modes can effectively change the heating mode of the user side and alleviate the contradiction between the supply and demand of thermal power, reduce the heating cost and realize the economic operation of the system.
Underground Structure Inspection in Geological Groundwater Environment Base on Geologic Radar Technology
Authors: Wang Yu , Shu Zongying , Huang Tianrong , Li Yongyu , Wang Shihua
Published: February 2021

How to accurately detect the anti-slide pile and the surrounding rock hole is the key to the correct application of the concrete quality treatment method, at the same time, it can ensure the control effect to a certain extent, and make the treatment project more economical and effective. The presence of water in the reinforced concrete layer, coupled with the void shape, and the irregular nature of the water in the hole, may be filled with air, mud, soil and other media factors, so there is considerable complexity. The number of abnormal bodies in the contrast enhancement diagram increases significantly, which is helpful for us to observe the loose area of anti-slide pile. We can find the pixel value corresponding to the feature by detecting the abnormal data of the pile one by one.
Experimental study on aging performance of elevator polyurethane buffer
Authors: Ren Facai , Jiang Tao , Liang Xiao , Hou Shaoyi
Published: February 2021

In this paper, the hygrothermal aging experiments of polyurethane buffer materials for elevator were carried out for 5 days, 10 days, 15 days, 20 days, 25 days and 33 days. The quality change, hardness change, tensile strength and elongation at break of the test materials before and after the experiment were compared and analyzed. The results show that the aging process of polyurethane materials is accelerated by the humid and hot environment.
Research on China's Energy Transition Strategy in the Context of Carbon Neutrality Based on SWOT
Authors: Jiao Bingqi , Xu Zhicheng , Zheng Kuan , Yan Xiaoqing , Feng Junshu
Published: February 2021

In order to actively respond to the climate change, China announced that it aims to have CO2 emissions peak before 2030 and achieve carbon neutrality before 2060. The energy industry is a key area in tackling the climate change and the energy transition is essential. Based on the SWOT analysis method, the paper analyses the internal and external factors of China's energy development, studies the strengths and weaknesses of the energy transition itself, and the external opportunities and threats it faces, and accordingly proposes several recommendations for China's energy transition strategy.
Study on reaction kinetics of single slime
Authors: Zhou Kun , Fu Wei , Xie Hongxi , Bao Jihu , Li Yayun , Lu Lei , Cheng Yunlang
Published: February 2021

The study of the combustion characteristics of single slime fuels is the basis for achieving clean combustion of solid fuels. This paper uses a combination of experimental and theoretical analysis, combined with the Coats-Redfen integration method, to study the influence of ash content and heating rate on the kinetic parameters of coal slime, and solve the combustion kinetic parameters. The results show that under the same heating rate, the activation energy gradually increases. As the ash content of coal slime increases, the activity of the coal slime sample decreases, and the reaction activation energy gradually increases.
Forecast of photovoltaic power generation based on DBSCAN
Authors: Zhang Jiaying , Zhang Yingfan
Published: February 2021

The power output of the photovoltaic power generation has prominent intermittent fluctuation characteristics. Large-scale photovoltaic power generation access will bring a specific impact on the safe and stable operation of the power grid. With the increase in the proportion of renewable energy sources such as wind power and photovoltaics, the phenomenon of wind abandonment and light abandonment has further increased. The photovoltaic power generation prediction is one of the critical technologies to solve this problem. It is of outstanding academic and application value to research photovoltaic power generation prediction methods and systems. Therefore, accurately carrying out the power forecast of photovoltaic power plants has become a research hot point in recent years. It is favored by scholars at home and abroad. First, this paper builds a simulation model of the photovoltaic cell based on known theoretical knowledge. Then it uses the density clustering algorithm (DBSCAN) in the clustering algorithm and classifies the original data. Finally, according to a series of problems such as the slow modeling speed of photovoltaic short-term power prediction, the bidirectional LSTM photovoltaic power prediction model, and CNN-GRU photovoltaic power prediction model based on clustering algorithm are proposed. After comparing the two models, it is concluded that the bidirectional LSTM prediction model is more accurate.
The conception and countermeasures of "green hydrogen" industrial chain in Chengdu area
Authors: zhang Li-min , zhang Rong-hu
Published: February 2021

With the application of hydrogen energy in the world, photovoltaic hydrogen producton industry has been ignited rapidly. Many Chinese governments and companies are producing hydrogen, often called "green hydrogen", from renewable sources. Japan, Germany. The Netherlands, Australia, Canada and other countries have carried out research or investment in large-scale photovoltaic hydrogen production projects. This article takes the hydrogen energy planning of Chengdu, Sichuan Province as the lead, and combines the actual conditions of the Ganzi region to discuss the feasibility of using photovoltaic power generation to produce hydrogen to support the development of the hydrogen energy industry in Chengdu under the conditions of abundant photovoltaic resources and no transmission.
Research on the selection of pipe materials for water supply and drainage
Authors: Wei Xingya
Published: February 2021

Municipal water supply and drainage project is one of the infrastructures that affects the planning of modern city construction. Therefore, it is required that the municipal water supply and drainage project can achieve economic, social and ecological benefits. As one of the basic elements of engineering project, the quality, performance and price of pipe materials have become a common concern in engineering construction. With the continuous development of modern science and technology, the type of water supply and drainage pipe has increased significantly. This paper briefly analyzes the properties, advantages and disadvantages, and application of common water supply and drainage pipes, hoping to provide some reference and help for the selection of pipe materials.
Multibody System Discrete Time Transfer Matrix Method for Nonlinear Shear Dynamic analysis of Immersed Tunnels
Authors: Shen Zhongyuan , Bai Xue
Published: February 2021

Shear seismic response analysis is critical for seismic design of immersed tunnels. According to the structural characters of immersed tunnels and shear dynamic response of their joints, a multibody dynamic model consisting of multi-rigid body, shear hinge, and viscous damping hinge is proposed for shear response analysis, in which the dynamic stiffness of the shear hinge is divided into two stages based on a threshold. Following the discrete time transfer matrix method for multibody system dynamics (MS-DT-TMM), the mechanical model and mathematical expression of each tunnel element is derived first and then assembled for the whole tunnel system. A solution procedure is proposed to solve the shear dynamic response of immersed tunnels using the proposed multibody system model. It is shown that the MS-DT-TMM has the same computational accuracy as the finite element method (FEM) and the modeling process is more efficient and flexible when compared to FEM. Although the MS-DT-TMM discussed herein is only applied to shear response analysis, it can easily be extended to analyze axial force and bending moment of immersed tunnels leading to a complete, rapid yet accurate enough seismic analysis of immersed tunnels suitable for engineering practices.
Numerical Simulation for Time Dependent Materials
Authors: Zhang WX
Published: February 2021

Time related materials have the advantages of high strength and easy processing. As structural materials, they are more and more widely used in chemical industry, machinery, aerospace, architecture and marine development and other industrial fields. The static and dynamic analysis of these materials and structures under various loading and service conditions has become an important research content in the field of mechanics. Based on the traditional method, this paper presents a simulation technique suitable for solving time-dependent material and structure problems, and gives the treatment method of boundary conditions.
Characteristics of runoff pollution in a highly urbanized region: A case study in the Dongguan City
Authors: Liu Qiming , Zeng Jingni , Wu Hongyan , Rong Qiangqiang , Yue Wencong , Su Meirong
Published: February 2021

Urban runoff pollution has become one of the major sources of water pollution. Rapid urbanization process in China has led to a significant increase in the pollution loads, which has posed great threats on the regional water environmental safety. Thus, it is of great importance to systematically analyse the characteristics of runoff pollution in some typical highly urbanized regions. Taking the Dongguan City in South China as the study area, output and spatial characteristics of the pollution emissions were investigated through a GIS-based empirical model. The results showed that the annual pollution loads of chemical oxygen demand (COD), suspended solids (SS), total nitrogen (TN) and total phosphorus (TP) exported from the city were approximately 338489, 613175, 28292 and 2824 t/a, respectively. In particular, the Songshan Lake Area in the city had the largest pollution loads, while the Water Town New Area had the least. In terms of pollution export fluxes unit area, they were highest in the Central Downtown Area (i.e. 2124, 3450, 145 and 16 kg/hm2 a for COD, SS, TN and TP, respectively) and relatively lower in the Southeastern Bordering Shenzhen Area. Enhancing the environmental management and improving the public environmental protection awareness are necessary for mitigating runoff pollution.
Evaluation of Ecological Livable Construction in Guangzhou
Authors: Qing Xin , Jia Haifa , Liu Chengkui
Published: February 2021

Guangzhou is the capital city of Guangdong Province, which is currently in a stage of transformation and development. This paper takes Guangzhou’s ecological economy, ecological society, ecological environment as the research objects and constructs an evaluation index system for Guangzhou’s ecological liveability. It takes social progress, economic development and environmental protection as the primary indicators. The index system is used to construct the ecological livability evaluation index system of Guangzhou through the entropy method.
Changing Degree Model of Pb Content Transported by Ocean Currents
Authors: Yang Dongfang , Lin Dong , Zhang Yuan , Yuan Xianpeng , Li Haixia
Published: February 2021

Based on the survey data of the waters of Jiaozhou Bay in May, August and October 1992, the change of Pb content and its deposition process in the surface and bottom waters of Jiaozhou Bay were studied. According to the definition and model of Dongfang Yang’s content changing degree, the variation of Pb content at surface and bottom and of Pb content transported by main sea current formed a peak line in the southeast waters of Jiaozhou Bay. The Pb content on the surface reached its peak in August. From May to August, Dongfang Yang’s content changing degree was 79.84°. However, from August to October, it was -85.29°. Specifically, in surface water, Dongfang Yang’s content changing degree from May to August was 62.48°. From August to October, Dongfang Yang’s content changing degree was -39.00°. In the bottom water, Dongfang Yang’s content changing degree from May to August was 70.41°. From August to October, Dongfang Yang’s content changing degree was -80.03°. It indicates that the change of Pb content in surface nearshore waters passed through by the main sea current was determined by the change of Pb content transported by the current. The change of Pb content in surface seawater through the change of ocean currents increases or decreases the increase or decrease of Pb content in surface water —The Pb content of surface water increased or decreased with the increase or decrease of Pb content transported by main sea currents. The Pb content temporal variation in the surface and bottom of the southeastern waters of Jiaozhou Bay from May to October reveals the Pb content settling law: With the increase of Pb content in surface water, the Pb content in bottom water rose faster than that in surface water. When the Pb content in surface water decreased, the Pb content in bottom water decreased much faster than that in surface water. Therefore, the change mechanism of surface and bottom water caused by source transport is proposed with the corresponding model block diagram and changing degree model of Pb content transported by ocean currents.
Research on Sustainable Development of Historical and Cultural District in Tunxi Old Street of Huangshan with Micro-Regeneration Concept
Authors: Li Wensheng , Zhang Xiaoxiao
Published: February 2021

As the most influential commercial port center of ancient Huizhou, Tunxi Old Street is an important material carrier of Hui culture. In the current optimization of urban stock, it is faced with problems such as the decline of regional culture and the homogeneity of spatial form. By combing the historical evolution and value characteristics of Tunxi Old Street, introducing the concept of microregeneration, exploring the strategy of micro-regeneration of historical and cultural districts, this paper realizes the sustainable development of district from three dimensions of urban venation restoration, node space activation and building characteristics shaping, which can provide reference for the regeneration of other historical and cultural districts.
Research on Architecture Design of Urban Comprehensive Management Service Platform
Authors: Jichuan Wang , Shengjin Wang
Published: February 2021

Information platform can connect all the urban management links and it is a key tool to improve the efficiency and quality of urban comprehensive management. In recent years, the construction of the urban management information platform has progressed rapidly, but problems such as insufficient resource sharing within the platform, poor information communication between departments, active supervision and monitoring are still outstanding and difficult to adapt to the city. From the perspective of urban comprehensive management needs, it is proposed that the ideal platform should consist of a city management sub-platform responsible for the necessary administrative permits, a city operation sub-platform responsible for information processing, and a city service sub-platform that serves citizens, with comprehensive information and rights. Features such as clear responsibilities, functional linkage, and real-time active monitoring serve the maintenance of urban basic functions and public space management. It is proposed that the guarantee mechanism should be straightened out, the rights and responsibilities between various departments should be clarified, and various resource data should be incorporated on the basis of the spatial data base map to activate and integrate three sub-platforms of urban management, operation and service to support urban management decision-making.
Urban planning and design strategy based on ArcGIS and application method
Authors: Zhang Jing Hua
Published: February 2021

GIS is a spatial information system combining geography, cartography, remote sensing and computer science, which is widely used in different fields. As a computer system, GIS can input, store, query, analyze and display geographic data. In the 1980s, GIS gradually began to be applied in the field of urban planning. This kind of digital technology meets people's requirement for regional geographic environment visualization. At the same time, the development of the network has also provided help for the popularization and development of this technology, making the dissemination and sharing of data possible. Nowadays, as an important technology, GIS has been widely used in all fields of urban planning and has gradually become an indispensable part. Arcgis as GIS platform building and applications will be treated as big data analysis and data visualization as an important part of planning, implementation of the software data correlation of traditional urban planning, break traditional design and drawing mode, through the spatial analysis function to generate new information, make decisions and solve problems efficiently, and make a prediction to the development of future city. Through the introduction of Arcgis data organization structure, CAD data loading, mapping and modeling under Arcgis platform and Arcgis spatial analysis function, this paper discusses how to use Arcgis platform to realize the application of urban planning and design.
Research on Interactive Soundscape Design for Urban Landscape
Authors: Xiaohong Li , Jinxiao Wang , Hongxuan Zhu
Published: February 2021

This paper intends to discuss the concept and design elements and methods of the interactive soundscape for urban landscape through the analysis on the influence relationship of components of a soundscape for urban landscape. With the analysis on the composition of the acoustic environment for urban landscape as the starting point, it finds out the implicit relationship of components of the acoustic environment, introduces the concept of interactive design, proposes the concept and components of the interactive soundscape for urban landscape and discusses its design methods and specific process with the case simulation method, taking the soundscape design of landscape nodes in Zhongshan Park, Qingdao as an example.
Construction of Characteristic Town Brand Color Systems: Color Extraction Based on Regional Landscape Architecture
Authors: Mao Fangyi , Zhao Pengcheng , Zhu Zhe
Published: February 2021

The brand image design of characteristic towns already becomes the way to improve awareness and promote propaganda in many characteristic towns. However, during the brand color system construction of characteristic towns, the differences in natural geography and cultural landscape have resulted in universal differentiation of characteristic towns, but the brand color constructions are very similar and lack scientific basis or differences, and even deviate from the original intention of town brand building. Given the difficulty in the brand color system development of characteristic towns, we proposed a strategy to build the characteristic town brand color system according to the color extraction from regional landscape buildings. With the characteristic Xiaolan Town in Zhongshan City of Guangdong province as example, the features of natural landscape plants and architecture color design were extracted on basis of the comprehensive regional landscapes. The color library for color design was acquired through data analysis, and the colors of historical landscape buildings were integrated with the colors of modern science and technology elements. With the introduction of building graphs, the deep connection between color design and brand visual image was enhanced. This design strategy offers some scientific values and theoretical guidance for exploring the brand color design systems of characteristic towns and for guiding the innovative strategies of designers.
Research on the Measurement of green Development level of Agriculture and Animal Husbandry in Haixi Prefecture
Authors: Yu Wen , xi Dingsheng
Published: February 2021

In this paper, the evaluation index system of the green development level of agriculture and animal husbandry in Haixi city was established, and the entropy weight grey correlation TOPSIS model was used to calculate the green development level of agriculture and animal husbandry in Haixi city from 2001 to 2019.The countermeasures and suggestions to promote the green development of agriculture and animal husbandry in Haixi prefecture were put forward.
Fault warning method based on extreme learning regression and fuzzy reasoning
Authors: Gang Li , Chen-guang Qiu , Shuai Cao , Ya-ou Wang
Published: February 2021

Aiming at the problem of condition monitoring of thermal power units, a fault early warning method based on fuzzy learning machine is proposed. The extreme learning regression model between monitoring parameters is established by using real-time data. Then the estimated value is fuzzed and used for fuzzy reasoning, finally, the fault diagnosis results of the unit under small abnormal state are obtained. The simulation data of a 1000 MW unit is used for verification test and results show that the proposed method is reliable and accurate which is suitable for thermal unit state warning.
A Brief Analysis of the Opportunities and Challenges Facing the Innovative Development of Ideological and Political Education in Universities under the Background of “Internet +”
Authors: Yu Bingyan
Published: February 2021

With the continuous development and progress of information technology, China has entered the stage of comprehensive network information development. Internet technology is also gradually playing an important role in various fields. The same is true in the field of education, and the combination of the Internet and education is also an inevitable development trend. Under the background of “Internet +”, the development of ideological and political education in colleges and universities is also the same. In the process of development, reform and innovation should be actively combined with the Internet. This paper focuses on the changes of ideological and political education in colleges and universities under the background of “Internet +”, and explores the development paths of ideological and political education innovation and Internet in colleges and universities. By exploring the innovative development of ideological and political education, the quality of ideological and political education in colleges and universities can be improved, thus further improving the innovative development of ideological and political education in colleges and universities, and laying a good foundation for the development of ideological and political education. Through in-depth exploration of ideological and political education innovation and development, it can be concluded that the current innovative development of ideological and political education in universities needs to be further explored with the help of Internet information technology. At the same time, attention should be paid to the inheritance and continuation of the correct values in traditional culture, so as to achieve the organic combination of the Internet and ideological and political education in colleges and universities.
Research on Mid-term Review System of PPP Project
Authors: Liu Jinchan , Guo Yubo , Chen Chuan
Published: February 2021

The mid-term review is a necessary window for the PPP project to move forward objectively, and it is also a tool to adjust the expected goals of all parties to the project. This paper built a mid-term review system for PPP projects based on the whole-of-life cycle, studied the objectives, content and evaluation procedures of the mid-term review of PPP projects, and took the urban and rural water supply and drainage integrated PPP project in Mianzhu city, Sichuan Province as the case for field research and interviews, to verify the feasibility of the review system. The research results have a certain guiding role for the mid-term review of PPP projects.
The Design of The Positioning Mechanism of The Mould Car in The Intelligent Manufacturing Production Line of Sanitary Ceramics
Authors: Zhong Bo , Lv Huachao , Gao Hui , Wang Ying
Published: February 2021

The social production demand of intelligent manufacturing production line of sanitary ceramics was expounded, the technological process of intelligent manufacturing of sanitary ceramics was analyzed, and the importance of mold car positioning in the whole system was put forward. This paper analyzes and explains the positioning mechanism, introduces its structural features, functions and characteristics, and explains its working principle in detail. It proves the superiority of intelligent manufacturing production line of sanitary ceramics, which has certain reference value and guiding significance for the manufacture and production of sanitary ceramics in China.
Research on Application Strategy of BIM Technology in Construction Project Management
Authors: Zhang Longbo , Liu Hao
Published: February 2021

BIM technology can participate in the entire process of building construction projects, using a three-dimensional way to restore all links involved in the process of building production. This intuitive and clear presentation method helps architects correct and quickly repair existing loopholes in a timely manner, ensure the smooth development of construction projects, improve efficiency and reduce losses due to project delays.