bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of lattice strain on Fe3O4@carbon catalyst for the destruction of organic dye in polluted water using a combined adsorption and Fenton process
Authors: Santhanaraj D. , Joseph N. Ricky , Ramkumar V. , Selvamani A. , Bincy I. P. , Rajakumar K.
Published: October 2020

The activity of the catalyst was directly correlated using lattice strain calculations, as derived from the W–H model.
In vitroevaluation of surface biological properties of decellularized aorta for cardiovascular use
Authors: Kobayashi Mako , Ohara Masako , Hashimoto Yoshihide , Nakamura Naoko , Fujisato Toshiya , Kimura Tsuyoshi , Kishida Akio
Published: October 2020

To identify the key factors forin vitroevaluation, decellularized aortas that previously showed goodin vivoperformance were evaluated. The results suggested the blood clotting test could be a key factor for prediction ofin vivoperformance.
Reverse photoluminescence responses of Ln(iii) complexes to methanol vapor clarify the differentiated energy transfer pathway and potential for methanol detection and encryption
Authors: Yin Shao-Yun , Fu Peng-Yan , Pan Mei , Guo Jing , Fan Ya-Nan , Su Cheng-Yong
Published: October 2020

A VOC detection and optical encryption model based on the uncommon reverse photoluminescence response of isomorphic Eu(iii) and Tb(iii) complexes to MeOH vapor.
Formation of the Musca filament: evidence for asymmetries in the accretion flow due to a cloud–cloud collision
Authors: Bonne L. , Bontemps S. , Schneider N. , Clarke S. D. , Arzoumanian D. , Fukui Y. , Tachihara K. , Csengeri T. , Guesten R. , Ohama A. , Okamoto R. , Simon R. , Yahia H. , Yamamoto H.
Published: October 2020

Context.Dense molecular filaments are ubiquituous in the interstellar medium, yet their internal physical conditions and the role of gravity, turbulence, the magnetic field, radiation, and the ambient cloud during their evolution remain debated.

Aims.We study the kinematics and physical conditions in the Musca filament, the ambient cloud, and the Chamaeleon-Musca complex to constrain the physics of filament formation.

Methods.We produced CO(2–1) isotopologue maps with the APEX telescope that cut through the Musca filament. We further study a NANTEN212CO(1–0) map of the full Musca cloud, H Iemission of the Chamaeleon-Musca complex, aPlanckpolarisation map, line radiative transfer models,Gaiadata, and synthetic observations from filament formation simulations.

Results.The Musca cloud, with a size of ~3–6 pc, contains multiple velocity components. Radiative transfer modelling of the CO emission indicates that the Musca filament consists of a cold (~10 K), dense (nH2∼ 104cm−3) crest, which is best described with a cylindrical geometry. Connected to the crest, a separate gas component atT~ 15 K andnH2∼ 103cm−3is found, the so-called strands. The velocity-coherent filament crest has an organised transverse velocity gradient that is linked to the kinematics of the nearby ambient cloud. This velocity gradient has an angle ≥30° with respect to the local magnetic field orientation derived fromPlanck, and the magnitude of the velocity gradient is similar to the transonic linewidth of the filament crest. Studying the large scale kinematics, we find coherence of the asymmetric kinematics from the 50 pc H Icloud down to the Musca filament. We also report a strong [C18O]/[13CO] abundance drop by an order of magnitude from the filament crest to the strands over a distance <0.2 pc in a weak ambient far-ultraviolet (FUV) field.

Conclusions.The dense Musca filament crest is a long-lived (several crossing times), dynamic structure that can form stars in the near future because of continuous mass accretion replenishing the filament. This mass accretion on the filament appears to be triggered by a H Icloud–cloud collision, which bends the magnetic field around dense filaments. This bending of the magnetic field is then responsible for the observed asymmetric accretion scenario of the Musca filament, which is, for instance, seen as a V-shape in the position–velocity (PV) diagram.
Study on Optimization of Working Performance of Ultra High Performance Concrete
Authors: Shengyu Wang , Yijian Zhan
Published: October 2020

The water binder ratio is a key parameter in the mix design of ultra-high performance concrete. Aiming at the high sensitivity of ultra-high performance concrete to water consumption, the influence of water consumption on the performance of ultra-high performance concrete was studied in a narrow range. The compatibility ratio of raw materials of ultra-high performance concrete can be adjusted, but the space is small, so we try to improve the fluidity of concrete by physical and chemical means. The experimental results show that the fluidity of concrete increases slightly with the addition of glass beads, but the flexural properties of the concrete are adversely affected. With the addition of viscosity reducer, the workbility of concrete increases, but the compressive strength decreases.
Analysis of pile spacing considering end-bearing soil arching and friction soil arching
Authors: Liu Mingpeng , Wang Hao , Zhang Hongbo
Published: October 2020

The soil arching effect is an important premise for anti-slide piles to exert the retaining ability. Pile space is an essential factor for the design of piles and is related to the soil arching behind piles. However, previous studies rarely considered the friction soil arching effect between piles and regarded the axis stress uniformly distributed. In this research, a method considering end-bearing soil arching and friction soil arching simultaneously was proposed to calculate the reasonable pile spacing. The said method considered the general shear failure and the yielding failure of these two soil arching. The yielding stress of inner-edge point and outer-edge point at arch-foot of the end-bearing soil arching were taken into consideration respectively. Based on the ultimate balance theory, the controlling equations of pile spacing were established. The case study showed that the method in this research conforms better to practice compared to previous researches. Matlab programming was employed to realize the automatic calculation.
Synthesis and characterization of a high performance polycarboxylic acid water reducing agent
Authors: Yan Qiong , Yao Liangke , Xia Yongzhong , Liu Shishan , Chen Lingcong
Published: October 2020

The optimal synthesis process conditions of polycarboxylic acid water reducers were investigated and characterized by infrared spectroscopy as well as GPC using high performance polycarboxylic acid water reducers synthesized by isoproterenol polyoxyethylene ether polymerized with acrylic acid and introducing unsaturated monomeric dibasic ester. The results showed that the optimum synthetic process conditions were as follows: acid-ether ratio of 3.0:1, amount of binary ester as 2.8% of monomer mass, amount of initiator as 0.35% of monomer mass, amount of chain transfer agent as 0.35% of monomer mass; the initial slump and initial expansion of the concrete of the synthetic water-reducing agent PCE-H were greater than those of the commercially available polycarboxylic acid water-reducing agent PCE-W, and the working performance of the concrete was better. PCE-H also has no adverse effect on strength.
Research progress on the preparation of concrete with large amount of iron tailings
Authors: Gu Xiaowei , Chi Haofeng , Liu Jianping , Liu Peng , Hu Ziyang , Zhang Huiwen
Published: October 2020

Recently, the use of sustainable materials has gained increasing attention and recognition, especially in the construction industry. As the main component of concrete, ordinary Portland cement (OPC) is undoubtedly one of the most commonly used building materials in the world. However, the manufacture of OPC is accompanied by environmental and ecological problems such as the release of carbon dioxide. According to estimates, about 5%-8% of the world think that carbon dioxide emissions come from the OPC industry, so it is urgent to use fly ash, tailings, slag and other industrial solid waste to produce cement instead of ordinary Portland cement.This article summarizes the achievements of the predecessors and outlines the influence of different iron tailings and iron tailings content on the mechanical properties and durability of concrete.
Recent Development in High-Content Reclaimed Asphalt Use
Authors: Chaoyang Jiang
Published: October 2020

In recent years, the use of recycled materials in construction and maintenance has increased significantly and been adopted as a common practice in the industrial field. Reclaimed asphalt pavement (RAP) is one of the most ideal materials that contain huge environmental and economic value. The present challenges faced with RAP is low utilization and degradation problems. Increasing the amount of RAP used in the mix design is considered an effective method to address these problems and can producing a three-fold benefit for the environment, economic, and landfill stress. The key point of increasing RAP use is usually reflected in the proper utilization of current production technologies, new mix design, and management. This paper summarizes the main limitation, distress, and present recent progress in high RAP use. The most common practice be utilized are the use of softer bitumen, softening additives and rejuvenators, while the application of warm mix asphalt technology also showed a positive result. The research results suggest that the utilization of those new practices could achieve better cracking resistance and improve the work-ability and rutting potential.
The Optimizations of MOSFET Contents in EE Undergraduate Course by using the Third Generation Semiconductor (Gallium Nitride)
Authors: Yuanlong Chen
Published: October 2020

Recently, the third generation semiconductor Gallium Nitride based electrical devices earn a more and more popular status in the industry for its easy popularization and cost effectivity. And another reason is the MOSFET with Gallium Nitride applied in power switching. However, transistors-related EE major (Electronic and Electrical engineering) courses are still focusing on the old silicon-based transistors, which own many deficiencies. In this paper, the current status of Gallium Nitride based MOSFET is investigated. Besides, a comparison in conducting capability, sensitivity and power efficiency between the MOSFET IRF510 and the Gallium Nitride based product GS-065-008-1-L is carried out. After the comparison, the application of MOSFET in EE courses is suggested and the priorities and difficulties are discussed as well.
Experimental investigation on the filtration of a novel composite plastic blind drainage on expansive soil slope
Authors: Wen Guo Cheng , Zheng Lei , Chen Qiong , Yan Jun , Wei Hua
Published: October 2020

Extensive clogging occurs to the blind drainage due to the high clay content of the expansive soil slope and the distinctly different grain composition between the matrix and the sand cushion. Thus, a novel composite plastic blind drainage was designed and its seepage performance was explored by laboratory filter test. Compared to the conventional system, adopting the new plastic blind drainage significantly reduced the demand of sand and gravel for field application. The results from the laboratory tests revealed that, the seepage of the drainage system with this novel composite plastic blind drainage functioned steadily in the long-term.
Experimental study on thermodynamic characteristics of EPS lightweight soil
Authors: Ruidong LUO , Liang Li , Ganbin LIU , Xing LU , Junneng YE
Published: October 2020

The dynamic triaxial tests of EPS light soil were carried out under the conditions of different temperature, dynamic stress, EPS mixing ratio, cement content and age period, and the effect of temperature on the dynamic properties of EPS light soil is analyzed prominently. The results show that with the increase of temperature, the dynamic elastic modulus of EPS light soil increases and the soil appears the phenomenon of thermal hardening. With the increase of cement content, the thermal hardening effect of the sample decreases, and the effect of cement content is greater than that of EPS content.
Application of Geomembrane on the Dam of Concrete Face in a Certain Hydropower Station Project
Authors: Kai PENG , Yaolai LIU , Liangliang MA , Guohui WANG , Xiaoliang WANG , Juan HU
Published: October 2020

A certain hydropower station is a concrete face rockfill dam, with the dam height of 219 m. Because of various reasons, Composite geomembrane was added on the concrete face below the elevation of 382 m. A combined impermeable system composed of composite geomememes and concrete panels is formed. This paper introduces the impermeable scheme of composite geomemmembrane, the impermeable silo design, the design of cross joint, the laying and fixing of geomemmembrane and the sealing and welding of geomemmembrane as well as its quality control and quality test and so on. The above achievements have accumulated experience for the application of composite geomememes in the anti-seepage technology of high dam.
Analysis of suspension bridge tunnel-type anchorage construction on the stability of surrounding rock
Authors: Li Nana , Zhou Yongqiang , Zhao Yanqiang , Li Guiju
Published: October 2020

In order to study the interaction between the left and right tunnels of suspension bridge tunnel-type anchorage, the finite difference numerical software is used to analyze the mechanical properties of the surrounding rock during the construction process. A numerical analysis model based on FLAC3D is established to analyze the stress, displacement and plastic zone changes of the surrounding rock of right tunnel anchor cavern during the construction of left tunnel anchor cavern. The right tunnel anchor cavern is excavated firstly, and then the left tunnel anchor cavern is excavated. The numerical simulation results show that the main displacement of the right tunnel occurs in the construction stage of the anchor plug body and the rear anchor cavern of the left tunnel. During the excavation of the left tunnel, the plastic zones of the left and right tunnel anchor caverns are only connected above the middle of the waist wall. Therefore, it is suggested that during the construction process, especially in the excavation stage of the anchor plug body and the rear anchor cavern, the area above the middle of the tunnel waist wall should be strengthened in time to ensure the construction safety.
Analysis of the influence of pile embedded cap depth on horizontal bearing capacity of PHC pipe pile group with cap
Authors: Bai Xue , Zeng Guohong , Guo Zhaosheng
Published: October 2020

This paper is based on the background of the field experiment of the closed renovation project of the coal yard of Shanxi Zhangshan Power Generation Co., Ltd., and the horizontal bearing capacity experiment of the three-pile cap foundation of the in-line PHC pipe piles to be carried out on the site is used as the prototype. ABAQUS establishes an analysis model to analyze the influence of pile embedded cap depth on the horizontal bearing capacity of pile cap foundation. The results show that the maximum bending moment the pile can withstand increases as the depth of the pile embedded cap increases. Therefore, increasing the depth of the embedded cap can increase the horizontal bearing capacity of the three-pill.
Influence of parameters in soil hardening model on deformation of excavation
Authors: CHEN Peng-fei , GONG Xiao-nan
Published: October 2020

Based on the data of the soil and enclosure structure of a certain excavation, a PLAXIS model was established. The actual monitoring results are compared with the PLAXIS calculation results to verify the reliability of the model. On this basis, the six main parameters in the soil hardening model were changed by a single variable method to obtain the influence of each parameter on the deformation of the excavation. As the soil weight or Poisson’s ratio increases, the lateral displacement of the retaining wall increases. With the increase of the secant modulus or cohesive force or internal friction angle of the soil, the lateral displacement of the retaining wall decreases. The power index m has basically no effect on the lateral displacement of the retaining wall. With the increase of m, the settlement of the soil gradually increases uniformly.
Calculation of Ultimate Bearing Capacity of Pile Foundations of Highway Bridges under the Coupling of Steep Slope and Karst
Authors: Feng Zhongju , Bai Shaofen , Min Wu , He Jingbin , Huang Zhouyi , Dong Yunxiu , Hu Haibo , Yin Jixing
Published: October 2020

In order to study the influence of steep slope-karst coupling on the vertical bearing characteristics of pile foundation, the orthogonal simulation tests of pile foundation under 4 different roof thickness and 5 different slope are carried out by using Marc finite element software, and the correction coefficient of vertical partial bearing capacity of pile foundation according to roof thickness and slope is put forward. The test results show that when the thickness of the roof is more than 3 times the pile diameter, the ultimate bearing capacity of the pile foundation tends to be stable, and the value is about 19% when the slope is 45°; the ultimate bearing capacity of the pile foundation decreases gradually with the increase of the slope, and the reduction reaches 29.83% when the slope is greater than 45°. According to the calculation results, the variation law of vertical partial bearing capacity of pile foundation is analyzed, and the calculation formula of standard value of vertical ultimate bearing capacity of pile foundation in steep slope karst area considering both roof thickness and slope is put forward, and the correction coefficients αi and β are put forward.
Simulation analysis and effect evaluation of excavation and support of underground cavern group
Authors: Zhou Heng , Huang Peng , Di Shengjie , Wang MingJiang
Published: October 2020

According to the main construction procedures of underground caverns, an analysis model for the excavation of a certain pumping station underground cavern group was established, and its excavation and support process are dynamically simulated. The calculation schemes of unsupport and support are compared with indicators such as plastic zone, bolt axial force and displacement field distribution. The analysis results show that after the support, the plastic zone distribution and deformation characteristics of the rock around the cave are greatly improved. The bolt axial force also meets the requirements, indicating that the support parameters and support methods are reasonable. The supporting effect has been well simulated and realized.
Research on Construction Risk Control of International Project
Authors: Cao Lixiang
Published: October 2020

From the perspective of China’s construction enterprises, taking the nature of risk and engineering’s characteristics into account. The paper apply the Delphi Method to establish primeval list of international project construction risk, use Analytic Hierarchy Process to conduct a comprehensive evaluation to risk factors in the primeval list of international project construction risk, identify risk factors and put forward coping strategies, The ultimate goal is to provide reference and a basis for risk management of construction companies involved in international project construction.
Digital simulation research of construction risk at the entrance of Shanchongjing tunnel
Authors: Liu Mingqi , Wang Qiongfen
Published: October 2020

The tunnel section of the highway tunnel is an important part of tunnel construction. Once accidents such as instability of the side slope and collapse of the palm face occur, it will affect the construction progress at a slight level, and will result in unpredictable economic losses and even casualties. Therefore, in the construction of highway tunnels, the opening section has always been taken as the key point of tunnel construction. Carrying out safety risk assessment on the construction stage of the tunnel section can discover the risks in time, so as to propose reasonable and feasible countermeasures to reduce the risks and reduce the consequences of the risks.
Investigation on the Screening Model of Chemical Hazards Based on the Risk of Domino Effect and Terrorist Attack
Authors: Wenduo Huang , Xuechun Shao , Jiajie Wang , Yang Xiao , Dongliang Sun
Published: October 2020

The heavy losses are often caused in modern chemical plants at the time of the accident. In order to prevent accidents, the screening and identification of hazards is needed. In this paper, the screening model of hazards in chemical plants was studied under the domino effect and the risk of terrorist attack. According to the threshold and strength of the domino effect of the unit under the main accident scenarios, the index of domino effect was developed. The risk index of terrorist attacks was determined in line with the distance between the unit and the boundary under the assumption of terrorist attacks. The hazards screening model Z was designed based on two aspects of the study. The model was applied in screening the hazards. The results showed that closer units near the border were more dangerous under the risk of terrorist attack, and the devices surrounded by units with greater influence of accidents were more dangerous under the risk of domino effect. The indices of the tanks were ordered: Z105>Z101>Z103>Z106>Z104>Z102>Z201>Z202>Z203>Z204>Z205>Z206>Z303>Z304>Z301>Z302>Z306>Z305. The domino effect and the risk of terrorist attacks were combined into the present model for perfection and correction of the existing hazards screening model, as the new basis for major hazards identification.
Research on Risk Assessment of Expressway Project under PPP Mode
Authors: Jiang Shengyue , wang Yanmei
Published: October 2020

On the basis of literature survey, this paper combines qualitative research with quantitative research to evaluate the influencing factors of expressway project risk under PPP mode. This paper starts from three parts:Firstly, starting from the current situation of expressway construction projects at home and abroad through the analysis of the advantages and disadvantages of PPP mode and three characteristics, the necessity and importance of project risk management under PPP mode are obtained. Secondly, the paper elaborates the risk of PPP project of expressway identifies the corresponding risk, and initially determines the three major factors affecting the risk of expressway project under PPP mode. Finally, according to expert judgment, the most critical factor is determined and a scientific, reasonable and effective risk factor evaluation index system is established. The index system includes three first-level indicators and six second-level indicators. On this basis, the judgment matrix is constructed by using the analytic hierarchy process, so as to form the influencing factor model. Finally, taking Fuling-Fengdu Expressway in Chongqing as an example, this paper uses the analytic hierarchy process (AHP) to carry out an empirical study on the model, in order to determine the importance of different risk factors.
Study and Numerical Simulation on Explosion Propagation Characteristics of Lignite Dust
Authors: Pang Zizheng , Zhu Shunbing , He Yanru
Published: October 2020

In order to reveal the explosion propagation law of lignite dust in 20L spherical explosion test device, the dust diffusion behavior and explosion propagation characteristics of lignite were studied by experiment and numerical simulation. The propagation process of dust explosion is studied by using high-speed camera and 20L spherical explosion test system, and the process of dust diffusion and explosion is simulated by using FLUENT software. The results show that the explosion propagation of lignite dust in the 20L spherical explosion test system has four different stages: the first explosion stage, the full explosion combustion stage, the continuous combustion stage and the combustion attenuation stage. The test results are slightly different from that of the fluent simulation of lignite dust explosion by using the high-speed camera to collect the dust explosion images. Results within the allowable error range, the experimental image of explosion combustion of lignite dust is well connected with the simulation results, which has a good display effect on the explosion propagation of lignite dust.
Design Method and Finite Element Analysis of a New Prefabricated Steel Special-shaped Lattice Column
Authors: Qi Zhenghui , Peng Xiaotong , Man Jie , Lin Chen , Duan Wenxu
Published: October 2020

A new steel special-shaped lattice column (SSLC) was proposed, which can be used in prefabricated steel structure residence. The finite element models of four SSLC with different cross-section (L-shaped, T1-shaped, T2-shaped and X-shaped) were established under cyclic loading by using ABAQUS, in which the strength, lateral resist capacity and hysteretic behavior were analyzed. The results indicate that SSLC has adequate strength, stiffness and safety redundancy. Among the four SSLC, the SSLC with X-shaped has the best structural performance and seismic behavior.
Research on detection method of leakage rate of rough pumping valve in space environment simulator
Authors: Yue Wu , Qingliang Guo , Mingyuan Fang , Juan Sun , Ziyin Guo , Xi Wei
Published: October 2020

As an important part of the vacuum system in the space environment simulator, the rough pumping system reduces the vacuum degree of the container from atmospheric pressure to the pressure of the high vacuum system when the space environment simulator starts up. As the key equipment of the rough pumping system, the rough pumping valve plays the role of isolating the rough pumping system from the environmental simulator, and its leakage rate has a direct impact on the vacuum degree that the space environment simulator can reach. Therefore, it is very important to detect the leakage rate of the rough pumping valve. In this paper, the leakage rate detection method of the rough pumping valve is introduced, including the valve delivery stage and valve installation stage to the simulator stage, in order to provide some basis for the follow-up valve leakage rate detection work
Research on Comprehensive Evaluation Method of Airport Runway Operational Effectiveness
Authors: Lei Jichao , Chong Xiaolei , Chen Dongfang
Published: October 2020

In order to assess whether the runway can meet safe, reliable and efficient objectives, a comprehensive evaluation indicator system needs to be established for evaluation. Firstly, the runway operation system is established, and the evaluation indicators of runway performance are divided into five aspects: personnel factors, support facility, mission demand, operating environment and management factors and then establish a comprehensive evaluation index system. Secondly, the TOPSIS evaluation model of game theory combination weighting is established, game theory is used to optimize the weights of the weights obtained by AHP and CRITIC, and the ideal solution (TOPSIS) is used to comprehensively evaluate the runway performance. Finally, the model was used to evaluate the runway performance levels of the three airports, and the three evaluation methods were compared. The results show that the results of the runway performance evaluation using the model are in line with the actual operation of the airport. The method is simple and the results are scientific and objective, and it have good versatility.
Some Thoughts on the Application of Three-dimensional Technology in the Construction of Transmission and Transformation Engineering
Authors: Wuchen Zhang , Gaofeng Wu , Gang Wang , Lin Xing , Mingfu Li
Published: October 2020

This paper puts forward some thoughts on the fine management of power transmission and transformation engineering construction with the help of three-dimensional technology, and discusses the installation, quality acceptance and construction organization deepening application of steel components in power transmission and transformation engineering construction.The physical 3D model is established by scanning technology, and the accuracy of machining components is checked by comparing the design model with the physical model. The construction process is simulated by the three-dimensional engineering management platform, and the problems existing in the actual construction are found, and the optimization of the construction organization design is carried out through the platform.
Research on the Shift Strategy for the Traction Vehicle with Automatic Transmission
Authors: Jing Zhou
Published: October 2020

Firstly, according to the working characteristic diagram of engine and hydraulic torque converter, the matching working point is found. On this basis, the theoretical model of gear shifting law is derived when the engine and the hydraulic torque converter work together by taking the acceleration of adjacent two gears equal as the shift point. Finally, the theoretical model is simulated, the shift pattern diagram of tractor automatic transmission is obtained and the shift pattern diagram is analyzed, and the results are of important reference value for further study of shift delay and other characteristics.
Research on optimal allocation of energy storage capacity of microgrid considering various factors
Authors: Hu Ning , Si Juncheng , Wang Yuanyuan , Wang Dehua , Liu Hanghang , Li Guanglei
Published: October 2020

For the grid connected by high proportion distributed power, energy storage system can effectively reduce the adverse impact of micro grid power fluctuation on the grid. Because of the high cost of energy storage system, it is necessary to optimize the capacity of energy storage system. Therefore, this paper proposes a capacity optimization method of energy storage system. Based on the comprehensive consideration of system objectives, construction costs, energy storage security and other factors, the simulation analysis model of the system is established, and the control strategy is optimized. In this paper, the algorithm is applied to the construction of microgrid demonstration project. The experimental results verify the effectiveness of the proposed method.
Long-period ground motion effect in Shaanxi Province of Changning Ms6.0 earthquake
Authors: Li Baolai , Ren Fengwen , Feng Hongwu , Gu Yunhe , Li Chunfeng
Published: October 2020

At 22:55 on June 17, 2019, an earthquake of magnitude 6.0 occurred in Shuanghe Town, Changning County, Yibin City, Sichuan Province. In Shaanxi Province, the obvious earthquake sense appeared in some places which are 600 km to 800 km away from the epicenter. Based on the collection, collation and analysis of the data about Weihe Basin, Hanzhong Basin and Ankang Basin in Shaanxi Province, and the analysis of representative seismic network records and seismic wave propagation distance in each basin, the mechanism of the long-period disaster induced by the Changning Ms6.0 earthquake in Shaanxi Province is revealed. This study has a positive significance for the seismic fortification of long-period structures in this area, the scientific popularization of long-term ground motion effect, and the avoidance of earthquake panic.
Analysis of flow characteristics in the tail reach of Ganjiang River, Poyang Lake in China
Authors: Ge Hua , Deng Chunyan
Published: October 2020

At present, the traffic pressure of Nanchang city, the capital of Jiangxi province, is increasing. The increasing demand for the construction of river crossing channel requires strengthening the research on the flow characteristics of the tail reach of Ganjiang River where Nanchang is located. In this paper, the south section of Nanchang city at the tail end of Ganjiang River was taken as the research object. By applying the plane two-dimensional flow mathematical model as the technical means, and using the latest measured topographic and hydrological data in 2020 to verify the model, the flow movement characteristics of the studied river section were calculated and analysed. The results show that the water surface gradient is slow, the flow field is smooth, the flow velocity is small, and the sediment is easy to deposit in this reach, which is easy to threaten the flood control of the river section.
Low Carbon Exploration in Urban Revitalization in Yangzhou Old City Project
Authors: Zhu Longbin , Xiang Hongyan , Zhang Qiaoli
Published: October 2020

Low-carbon and ecological city and sustainable conservation of historic urban areas are issues that need to be addressed in current urban development in China. Based on the principles of community participation, local adaptive technology and cost-benefit balance, Nanhexia Low-carbon Community Project in Yangzhou proposed holistic strategies and solutions to achieve low-carbon community by means of low-carbon planning, low-carbon transportation, energy efficiency of building, low-carbon behavior, and greening in open space. The project innovatively integrated low carbon concepts into regeneration of old city, combined traditional architectural styles with modern green technologies, and won the first platinum award of LEED Homes in China. The experience of the project may provide reference for the regeneration of other communities or other similar projects in old cities.
Research on the Planning of Attached Green space in Residential area from the perspective of elderly activities
Authors: Dai Xiangjun
Published: October 2020

The aging of population in China has been further deepened, and the living environment of the elderly has been widely concerned. As an important place for residents’ activities, the attached green space of residential area plays an important role in optimizing urban ecological environment, shaping urban landscape, providing recreation services and preventing and avoiding disasters. At present, the landscape space design of the attached green space in the residential area specially designed for the elderly is not in harmony with its demand intensity. Scientific planning of the attached green space in the residential area can enrich the daily recreational activities needed by the elderly, so as to better improve the quality of life of the elderly and promote their health. From the behavior characteristics of the elderly, the activities of the affiliated green space of residential demand, put forward under the background of an aging society residential affiliated green space reasonable planning direction, for the effective supply of the elderly daily behavior space, sufficient to guide the healthy life of the elderly to improve life quality and health level put forward the corresponding design strategy, try for the urban residential affiliated green space elements, structure, system function coordination optimization to provide theoretical support.
Exploration of the role and effect of robot course in the training of application ability
Authors: Wang Li , Zhang Enguang
Published: October 2020

Combined with the application-oriented independent colleges to build a college of robotics industry, and many years of experience in setting up robot courses, it is proposed that robot courses play an important role in the cultivation of students’ application ability, which can promote students’ ability to obtain comprehensive information actively, improve their practical ability, stimulate their innovation ability,and train students’ engineering design thinking.It is an effective carrier of cultivating students’ application ability. And the practice effect is remarkable, many excellent student robot works have emerged, which provides the basis for further improving the teaching quality and teaching reform.
Analysis of Land Use in Jining City
Authors: Lu Nanjia , Xiao Xingyuan
Published: October 2020

Jining City is a typical area with complex and diverse landforms, developed water systems and rich mineral resources. Research on its land use changes will be of great significance in terms of sustainable development and ecological protection. This paper is based on the four LANDSAT remote sensing image data in 2000, 2005, 2010 and 2015, using RS, GIS, mathematical statistics and other methods, mainly analyze the land use of Jining City from 2000 to 2015 from three aspects: land use structure, land use characteristics and problems, land use area and structure changes. The results show that: (1) Jining City has the largest area of dry land, which is widely distributed in various regions; followed by construction land, water, grass, woodland, paddy field, and unutilized land. (2) The land use characteristics of Jining City are: high arable land rate, high land utilization rate, large proportion of water area, abundant surface water resources, and obvious regional differences in land use; the problems are that the land use structure is unreasonable, per capita land resources are few, and the contradiction between people and land has become increasingly prominent. (3) On the whole, land use changes in Jining City are relatively complex. The town house area has been showing an increasing trend; the grass area has shown a continuous decreasing trend; the fluctuations of dry land, paddy field, woodland, house-site in the countryside, water, and unutilized land area fluctuations are obvious. During the 15 years from 2000 to 2015, the largest change in the land use structure of Jining City was town house, followed by paddy field, house-site in the countryside, dry land, grass, woodland, unutilized land, and water. The area of town house, dry land, forest land, and water has increased, while the area of paddy field, house-site in the countryside, grass, and unutilized land has decreased.
Research on the Historical and Regional Cultural Elements in Cityscapes of Yili, Xinjiang
Authors: Liu Jiaying , Wang Menghu , Lei Weiwei
Published: October 2020

Xinjiang, since it became affiliated with the central plain dynasty once again in the middle of the Qing Dynasty, has been committed to city building and construction in batches, aiming to reinforce military defense and develop economy through reclaiming outlying wasteland. Yili is a area of renown in history that remains geographically essential to the military defense of China’s northwestern border. Starting from its regional culture, this paper analyzes the cultural elements incorporated in its historical cityscape planning, which principally encompass geographical landmarks, ethnicities, religions among other cultural landscapes, and elucidates the necessity of integrating regional culture and landscape design, in an attempt to furnish approaches to exploring and carrying forward traditional regional culture, preserving cultural landscapes unique to this area, and displaying the peculiar enchantment.
The Index and Stock Price Synchronicity: Evidence from Taiwan
Authors: Pan Chung-Lien , Pan Yu-Chun
Published: October 2020

Research on stock synchronization has always been a topic of concern to scholars and investors. In the past, the focus was mainly on equity concentration, foreign shareholding, audit quality, and other issues, not including indexes. This article uses the monthly data of the Taiwan Stock Exchange Capital Weighted Stock Index (TAIEX) to solve the problem of the index and stock synchronization. And use the technical theory of the gray system to solve the small sample and uncertain problem. The discovery of the synchronization between these indexes and stock prices may provide investors with sufficient reference to make investment decisions.
Research on color planning of campus buildings in Shenyang Jianzhu University
Authors: Lyu Mei , Liu Jiahao , Zhang HengYu , Sun Dong
Published: October 2020

This paper is based on the perspective of regional architectural color planning and selecting campus buildings in cold regions as an example, taking architectural color as the research object, making a multi-viewpoint research on the use of color and its influencing factors. This article conducts actual investigation on the color of exterior facades of buildings in different areas of Shenyang Jianzhu University Campus, systematic evaluation and suggestion on architectural color of Shenyang Jianzhu University on the basis of Munsell color solid system.
Lokale Vibrationstherapie in der Neurorehabilitation – Eignet sich der intraorale Vibrationsspatel zur Verbesserung der Zungenkraft bei Schlaganfallpatienten? – Eine Pilotstudie
Authors: Hricová Marianna , Hammer Sina
Published: October 2020

Ziel Das Ziel der Pilotstudie ist es die Wirkung der Vibrationstherapie mit den intraoralen Aufsätzen des Novafon Schallwellengerätes auf die Zungenkraft zu messen und diese mit der Wirkung der Standardtherapie – Widerstandsübungen mit dem Holzmundspatel zu vergleichen.

Methode Sechs Probanden wurden in die Interventionsgruppe (Vibrationstherapie) und Kontrollgruppe (Standardtherapie) eingeteilt. Nach Messung des Zungenspitzendrucks mittels IOPI führten beide Gruppen 3 Wochen lang viermal wöchentlich Zungenwiderstandsübungen durch. Nach der Interventionsphase wurde der Zungenspitzendruck gemessen und verglichen.

Ergebnisse Alle Probanden der Interventionsgruppe konnten ihren Zungenspitzendruck im Vergleich mit der Kontrollgruppe messbar steigern.

Schlussfolgerung Widerstandsübungen der Zunge gestützt durch lokale Vibration von 100 Hz können die Zungenkraft bei Schlaganfallpatienten mit Dysphagie messbar verbessern.
Virtual-Reality-Anwendungen für den Einsatz in der Luftfahrt und im All
Authors: Pustowalow Willi , Arz Michael , Petrat Guido , Frett Timo
Published: October 2020

Virtual-Reality-Anwendungen (VR-Anwendungen) werden neben der Unterhaltsbranche auch in vielen industriellen und medizinischen Anwendungsfeldern genutzt 1, 2. Auch in der Raumfahrt wird derzeit der Nutzen von VR-Technologien erforscht. Neben einer Verbesserung bei der Vorbereitung von Experimenten im All steht dabei die Gesunderhaltung der Astronauten besonders bei Langzeitmissionen im Vordergrund 3. Ein möglicher Ansatz ist der Einsatz von VR beim körperlichen Training unter künstlicher Gravitation. Das Ziel ist die Entwicklung eines einfach zu nutzenden VR-Systems, mit dessen Hilfe ein Training unter künstlicher Schwerkraft in einer virtuellen Umgebung zur Erholung genutzt werden kann 1, 4, 5. Am Markt verfügbare VR-Systeme sind für einen statischen Raum konzipiert. Um VR-Systeme in Umgebungen mit erhöhten Beschleunigungen, wie auf einer Zentrifuge, nutzbar zu machen, wurde die Berechnung der virtuellen Realität an die drehende Umgebung angepasst. Erste Tests waren erfolgreich. Ob die Nutzung von virtuellen Umgebungen auch zu einer besseren Gewöhnung an ein Training unter hohen Beschleunigungskräften führen kann, wird im Rahmen von weiteren Studien ergründet.
PET Parameters are Useful in Predicting Endometrial Cancer Risk Classes and Prognosis
Authors: Budak Adnan , Beyan Emrah , Inan Abdurrahman Hamdi , Kanmaz Ahkam Göksel , Aldemir Onur Suleyman , Oral Aylin , Yazici Bulent , Akgün Ayşegül , Ozeren Mehmet
Published: October 2020

Aim We investigate the role of preoperative PET parameters to determine risk classes and prognosis of endometrial cancer (EC).

Methods We enrolled 81 patients with EC who underwent preoperative F-18 FDG PET/CT. PET parameters (SUVmax, SUVmean, MTV, TLG), grade, histology and size of the primary tumor, stage of the disease, the degree of myometrial invasion (MI), and the presence of lymphovascular invasion (LVI), cervical invasion (CI), distant metastasis (DM) and lymph node metastasis (LNM) were recorded. The relationship between PET parameters, clinicopathological risk factors and overall survival (OS) was evaluated.

Results The present study included 81 patients with EC (mean age 60). Of the total sample, 21 patients were considered low risk (endometrioid histology, stage 1A, grade 1 or 2, tumor diameter < 4 cm, and LVI negative) and 60 were deemed high risk. All of the PET parameters were higher in the presence of a high-risk state, greater tumor size, deep MI, LVI and stage 1B-4B. MTV and TLG values were higher in the patients with non-endometrioid histology, CI, grade 3 and LNM. The optimum cut-off levels for differentiating between the high and low risk patients were: 11.1 for SUVmax (AUC = 0.757), 6 for SUVmean (AUC = 0.750), 6.6 for MTV(AUC = 0.838) and 56.2 for TLG(AUC = 0.835). MTV and TLG values were found as independent prognostic factors for OS, whereas SUVmax and SUVmean values were not predictive.

Conclusions The PET parameters are useful in noninvasively differentiating between risk groups of EC. Furthermore, volumetric PET parameters can be predictive for OS of EC.
Exploration of Iron- and α-Ketoglutarate-Dependent Dioxygenases as Practical Biocatalysts in Natural Product Synthesis
Authors: Renata Hans
Published: October 2020

Catalytic C–H oxidation is a powerful transformation with enormous promise to streamline access to complex molecules. In recent years, biocatalytic C–H oxidation strategies have received tremendous attention due to their potential to address unmet regio- and stereoselectivity challenges that are often encountered with the use of small-molecule-based catalysts. This Account provides an overview of recent contributions from our laboratory in this area, specifically in the use of iron- and α-ketoglutarate-dependent dioxygenases in chemoenzymatic syntheses of complex natural products.

1 Introduction

2 Overview of Natural Oxygenases

3 C5 Hydroxylation of Aliphatic Amino Acids

4 Chemoenzymatic Synthesis of Tambromycin

5 Chemoenzymatic Synthesis of Cepafungin I and Related Analogues

6 Chemoenzymatic Synthesis of GE81112 B1 and Related Analogues

7 Conclusion and Future Direction
Clinical Performance of Nonvitamin K Antagonist Oral Anticoagulants in Real-World Obese Patients with Atrial Fibrillation
Authors: Russo Vincenzo , Bottino Roberta , Rago Anna , Papa Andrea Antonio , Liccardo Biagio , D'Onofrio Antonio , Golino Paolo , Nigro Gerardo
Published: October 2020

The prevalence of both atrial fibrillation (AF) and obesity has steadily increased. Nonvitamin K antagonist oral anticoagulants (NOACs) have been shown to be more effective and safer than vitamin K antagonists (VKAs) for long-term stroke prevention in patients with nonvalvular AF. There are still limited data in the literature regarding performance of NOACs in obese patients with AF in the “real world.” The aim of our study was to compare the safety and effectiveness of NOACs versus well-controlled VKA therapy in obese AF patients in a “real-world” setting. Here, we have considered patients with AF and obesity (body mass index [BMI] > 30 kg/m2) on NOAC or VKA therapy included in the multicenter Atrial Fibrillation Research Database (NCT03760874). The occurrence of major bleedings (MBs) and thromboembolic events (composite of ischemic stroke, transient ischemic attack, and systemic embolism) was respectively considered primary safety and effectiveness outcomes. We identified 1,047 AF patients with obesity who received NOAC (n = 272) or VKA (n = 775) treatment. After propensity score matching analysis, 248 NOAC and 496 VKA recipients with similar clinical characteristics, including BMI (34.8 ± 3.4 in NOAC vs. 35.1 ± 3.8 in the VKA group; p = 0.50), were evaluated. The mean follow-up was 39 ± 7 months. The incidence rate of thromboembolic events was 1.10 per 100 person-years (0.67 in NOAC vs. 1.28 in the VKA group; hazard ratio [HR]: 0.52; 95% confidence interval [CI]: 0.22–1.22; p = 0.19). The incidence rate of MB was 1.9 per 100 person-years (1.1 in NOAC vs. 2.28 in the VKA group; HR: 0.46; 95% CI: 0.24–0.88; p = 0.04). The incidence rate of intracranial hemorrhage was 0.4 per 100 person-years (0.27 in NOAC vs. 0.47 in the VKA group; HR: 0.57; 95% CI: 0.12–2.73; p = 0.48). A positive net clinical benefit (NCB) of NOACs over VKAs was found (+0.91). Presence of anemia (HR: 1.75; p = 0.003) and concomitant use of antiplatelet drugs (HR: 2.41; p = 0.001) were found to be independent predictors of MB; moreover, age (HR: 1.65; p = 0.003) was an independent predictor of thromboembolic events. Our data support the hypothesis of safe and effective use of NOACs in patients with AF and obesity, justified by a statistically significant lower incidence of MB and a favorable NCB over VKAs.