bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Evaluation of the Quality of Medical Research Project Funds Use
Authors: Wei Wei
Published: March 2020

The illegal use of scientific research funds may lead to serious consequences such as “corruption crime”, which not only causes the loss of national scientific research funds, but also ruins the personal future of scientific researchers. Establish the evaluation model of the use quality of scientific research funds, scientifically select evaluation indicators, and establish the weight of indicators, so as to quantify the use quality evaluation of project funds, and originally put forward the “corrective calculation”. The evaluation indictor can effectively guide scientific research personnel to use scientific research funds rationally and prevent the negligent behavior of scientific research funds.
Research on Ship Exhaust Gas Accounting in Yangtze River
Authors: Gao Zheng , Zhou Yi , Wang Mingdong
Published: March 2020

Based on the comparison and analysis of existing ship exhaust emission accounting methods, and combined with the characteristics of ship exhaust emissions in the Yangtze River channel, this paper selects the appropriate calculation idea, and revises the basic accounting method of ship exhaust emissions according to the calculation accuracy requirements in this paper. Finally, a calculation model for the emissions of ships in the Yangtze River channel is established, and its reliability and accuracy have been confirmed by model tests of the model data. In this paper, the Yangtze River ships are divided into sea-going ships and inland river ships, and their corresponding parameters are calculated respectively, in order to make sure that the accounting results have higher accuracy. The model has strong applicability to the exhaust emission of ships in the Yangtze River, and its calculation results are relatively accurate, and the calculation process is simple and efficient. This paper has a very high social significance and practical value for the analysis and model optimization study of the Yangtze River’s exhaust emission accounting.
Intermediary Governance Mechanism of Collaborative Innovation in Green Building Industry, University and Research
Authors: He Weiyi , Chen Lulu
Published: March 2020

Green technology is the dominant technology. The collaborative innovation of green building, industry, university and research must attach great importance to the industrialization of green technology in the upstream industry, which is of great significance to the economic development under the new normal. The research content and methods based on market orientation and production-use cooperation are still limited to framework and experience research. The research on bilateral collaborative innovation cooperation mode and contract governance of upstream and downstream enterprises that touched on the core issues of “production, study and research” has not been carried out in depth. Taking the collaborative innovation of production, research and research in green building as the research module, this study conducts in-depth research on the lack of design intermediary innovation in the technology supply side (green technology production enterprise) and technology demand side (green construction project owner). This paper proposes a bilateral collaborative innovation network structure with industry-university-research and engineering innovation functions.
Research on Dynamic Measurement Method of Electromagnetic Environment Based on Image Similarity
Authors: Bo Zhao
Published: March 2020

In this paper, by discretizing the battlefield region, using the power, frequency and direction of the wave to quantitatively characterize the electromagnetic environment, the image similarity measure, the gray histogram comparison and the signal arrival direction histogram method are introduced to analyze the histogram. The degree of change of the graph is proposed, and a calculation method for calculating the degree of change of electromagnetic environment is proposed. The method is simulated. The comparison of the histograms at different time points proves that the method has certain effectiveness in dealing with various electromagnetic environments.
Survey and Evaluation of Public Acceptance of Environmental Risk Based on Cloud Model Take the heavy chemical PX project as an example
Authors: Cui Mingxin , Li Kexin
Published: March 2020

This paper takes the heavy chemical PX project as the research object, and builds an evaluation system based on environmental values, risk communication, system trust and risk perception. Use questionnaires to obtain real and extensive data, and use cloud models for case analysis. The results show that the public’s acceptance of environmental risks in heavy chemical projects is at a medium level, indicating that there are insufficient environmental risk communication and public participation methods and channels in heavy chemical projects. The government should improve the communication mechanism of public participation in the decision-making of major projects and reduce the occurrence of environmental risk group incidents.
Research on Vocabulary Identification and Misunderstanding in The Process of Translating Environmental Energy Science and Technology Documents into Chinese
Authors: Zhang Hui
Published: March 2020

English is an international language. English translation is one of the indispensable skills in international communication. The world has in-depth research and advanced technology on environmental energy. Therefore, how to translate advanced environmental energy articles can be effective. Learning the corresponding knowledge, and in the translation of professional energy science and technology vocabulary, meaning, we need to start from the scientific background of Chinese and English, analyze the importance of English translation into Chinese in the process of English translation in different contexts, through analysis of professional literature The key points that must be mastered in vocabulary and lexical translation in English translation, and then put forward the strategies to improve the vocabulary and lexical translation in English translation of energy science and technology literature. How to learn vocabulary, lexical translation vocabulary and meaning in English translation of energy-related manuscripts Lay the foundation and avoid misunderstandings.
An Assessment on Hounslow Heath Heavy Metal Contaminated Land Soil Quality and a Recommendation of a Primary School Location Chosen
Authors: Zhang Han
Published: March 2020

This report will deal with the following aspects of Hounslow Heath contaminated land potential soil issues such as heavy metal containment. Meanwhile, it will give a recommendation on primary school location chosen in this region after comprehensive assessments. Firstly, backgrounds of contaminated land and Hounslow Heath will be briefly introduced, then the significances of those two factors will be identified, which includes the risk of reusing contaminated land and the difference between Hounslow Heath and other habitats. By telling the significances, the purpose of this part in the report is to discuss the value of Hounslow Heath, which is recognized as contaminated land because of historical landfill. In order to reuse this site, the contaminated land assessment is necessary under risk assessment regulation. After then, an analysis of Hounslow Heath, sampling points and methodology used will be presented, followed by data analysis, results will be motioned for further discussion.
Research on the Method of Improving Water Quality in Closed Water by Photocatalysis
Authors: Wu Xinyi , Cao Cong , Chen Yijing , Li Jiacheng
Published: March 2020

At present, eutrophication of closed water bodies is a global problem of water environment pollution. About 80% of closed water bodies in China have eutrophication problems. Existing treatment methods have high cost and secondary pollution problems. Therefore, the use of photocatalytic technology to treat inorganic nitrogen, organic pollutants and algae in the surface of closed water bodies can better avoid the eutrophication of water bodies. Occurs to achieve the purpose of maintaining the water environment.
Research on the Performance Evaluation Index System Construction and Countermeasure of Low-carbon Economic Development in China
Authors: Zhang Feng , Qi Yong
Published: March 2020

The development of a low-carbon economy to achieve energy conservation and emission reduction has become an important way for countries around the world to cope with global warming and the environment is deteriorating. While China’s economy is developing rapidly, it has also paid a huge environmental cost. How to develop a low-carbon economy, achieve energy conservation and emission reduction, and create a better living environment for the people has become a common concern of the whole society. Based on the definition of low carbon performance concept and scope, this paper attempts to construct an index system that includes low carbon environmental benefits and low carbon economic benefits, objectively evaluates low carbon effects and efficiency, and proposes countermeasures around low carbon development. Provide effective support and theoretical basis for the government to formulate corresponding policies and reward and punishment mechanisms.
Effects of Air Pollution on Small Cell Lung Cancer in Guangxi Zhuang Autonomous Region
Authors: Xie Yaoying
Published: March 2020

This article hopes to investigate the relationship between air pollution and small cell lung cancer through statistical data, and summarize experience. We investigated the causes of lung cancer in Beihai of Guangxi Zhuang Autonomous Region in recent 10 years. Results we found that there were relatively more lung cancer cases among workers of paper mills, residents living nearby and cottage residential areas, and the incidence of lung cancer among women increased and tended to be younger. Through statistical analysis, we believe that SO2 and smoke in the air are the main causes of small cell lung cancer.
A Method for Verifying the Behavioral Consistency between Public Business Process and Private Business Process Based on Environment
Authors: Chen Yitong
Published: March 2020

The cross-organizational business process is characterized by privacy, collaboration, autonomy, dynamic interaction structure, etc. It is necessary to model and analyze the cross-organizational business process in order to ensure the accuracy and consistency of process interaction among different organizations. The open workflow net proposed on the basis of Petri net is used as a tool to model the cross-organizational business process. The cross-organizational business process is divided into two parts, namely private process and public process. The private process is regarded as the internal view of the organization, and the public process is regarded as the external view of the interaction between an organization and other organizations. The interaction behavior of model verification is regarded as the starting point with regard to the behavioral consistency problem of the model. A method for verifying the behavioral consistency based on environment is proposed, which is more relaxed than the existing method for verifying the behavioral consistency based on mutual simulation and more consistent with the asynchronous communication among organizations.
A Method of Security Emergency Plan Decision Making by Cloud Model Computing
Authors: Yin Hang , Feng Chaoying
Published: March 2020

This paper designed a method of security emergency plan decision making by cloud model computing. This method is made in order to accurately determine security emergency plan in time when safety accident occurred. First, built a index system which is suitable for comprehensive transportation projects. Second, ran a cycle improvement rate according to cloud thickness to get the evaluation indexes and cloud weight, and then put them into the comprehensive formula to get the reference cloud. At last, drew reference cloud and evaluation clouds on a 3D picture by Matlab and compare each evaluation cloud with the reference cloud, the plan which had the finest similarity is the best one. This method can realize visual comparison for safety emergency plans.
Vibration Noise Rejection Method Based on Empirical Mode
Authors: Wang Baojun , Liu Heng , Cai Meng , Xu Bingchuan , Liu Wei
Published: March 2020

In order to get rid of vibration noise signal in the shock wave test, according to the measured shock wave pressure signal and the interference signal, the signal is decomposed by EMD to calculate the correlation of the components. Then the signal, strong correlation with the interference signal, is selected to carry out noise reduction and synthesis processing, and the parameters such as pressure peak and action time are extracted. The verification shows that the proposed method can effectively eliminate the interference signal caused by vibration during the test.
Modeling of one Dimensional Hysteresis Properties Based on Preisach Model
Authors: Jin Shuhan
Published: March 2020

The B-based Preisach model, which employs magnetic induction intensity B as input and magnetic field intensity H as output, is proposed to overcome limitations and imperfections of the classical Preisach model (H-based model). Based on measured data of major hysteresis loop, first order reversal curves were created by numerical method, and Everett function was then established. Thus B-based model can be realized. Finally, the B-based and H-based model is applied to simulate the concentric hysteresis loops of soft magnetic materials and the high order reversal curves of hard magnetic materials, respectively. And the validity and accuracy of B-based Preisach model are verified by comparing with the experimental data measured under DC conditions.
Greenhouse Intelligent Control System Based on Indoor and Outdoor Environmental Data Fusion
Authors: Sun Wei , Kong Fantao , Zhang Jianhua , Wu Jianzhai , Chai Xin , Cao Shanshan
Published: March 2020

This paper first defines the development direction and development goals of intelligent greenhouses in the era of big data. At the same time, based on the lack of research on the synergistic effect of the existing intelligent greenhouse on the indoor and outdoor environment, the analysis and design of the greenhouse intelligent control system based on indoor and outdoor environmental data is proposed. The system has the advantage of pre-regulation before the environmental parameter changes beyond the threshold to make the greenhouse environment more stable and suitable. At the same time, the predicted values are converted into easy-to-understand grading indicators to facilitate farmers to understand the application. This paper aims to analyze and design the feasibility and practical application of the system.
A New Echo Signal Processing Method for Blind Area Imaging of SAR
Authors: Ma Yanheng , Hou Jianqiang , Li Gen
Published: March 2020

The navigation, positioning and imaging of blind area (unknown area) has always been one of the research focuses in the field of unmanned and intelligent development. It is known that the choice of the grid where the sub-images are computed is a key point of the fast factorized back projection (FFBP, can be adopted to obtain images with arbitrary trajectories) algorithm. The grid partition of blind area may result in the loss of information in the imaging area due to the unpredictability. The same loss also exists when the angle of existence deviates from the ideal imaging angle. In this paper, a new echo signal processing method for blind area imaging of synthetic aperture radar (SAR) is proposed. It is presented that a method of describing irregular echoes by using generalized array. The definition and operation principle of generalized array are introduced, as well as the relationship between the echo described by generalized array and traditional echo. Finally, the simulation results show that the proposed method is beneficial to imaging processing, and the method has great significance to range migration correction in frequency domain and imaging grid generation of BP algorithm.
Research on Detection Technology of Autonomous Landing Based on Airborne Vision
Authors: Li Jiahuan , Wang Xinhua , Cui Hengrui , Ma Ziyuan
Published: March 2020

In this paper, aiming at the cooperative target detection problem in the process of unmanned helicopter sliding down, a detection method based on complementary filtering is proposed, which fuses improved SSD algorithm and related filtering KCF algorithm. The improved deep learning SSD model redesigns the feature extraction structure to improve the detection effect of small and medium targets for the small target size and large scale change in the landing scene. Then use the detection results of the SSD model to correct the KCF detection, adjust the weight parameters, and output the final fusion detection results. The test results show that the improved model detection accuracy is significantly improved, the detection accuracy in various environments reaches 93.3%, which is higher than 86.1% of the classic SSD model and 87.5% of the Faster-rcnn model. The final proposed fusion detection algorithm has a success rate of 91.1% and a processing speed of 91 hz, which basically satisfies the requirements of the ship.
Analysis and Research on Pollution Treatment Technology in Environmental Protection
Authors: Liang Xiaotian
Published: March 2020

With the rapid development of the economy, the industrialization process has brought about a rapid improvement in people’s quality of life, but it has caused pollution in the natural environment on which we depend. In order to protect the environment, the government has issued a number of policies and achieved great results. Based on this, this paper analyzes the status of environmental pollution in detail, and focuses on the analysis of CCAS process and SPR wastewater treatment technology, clarifies the importance of advanced pollution treatment technology to environmental protection, and proposes targeted strategic recommendations to promote Better and more sustainable development of the environment.
Research on China’s Monetary Policy and Stock Market Price-volume Relationship Based on TVP-SV-VAR Model
Authors: Hu Yibo , Lai Yujie
Published: March 2020

A time-varying VAR system model of monetary policy and stock market is established in this paper for analyzing the dynamic correlation and response mechanism between monetary policy variables and stock market variables. It is found that the influence of interest rate on stock price has experienced a period of “irrelevance, positive correlation and negative correlation” in 20 years. According to the uniformly-spaced impulse response, it is found that China’s monetary policy has real effect in the short term, but lacks long-term sustainability. The stock reform in 2005 can be regarded as an important time node to change the relationship of stock market price-volume in the past two decades. For most of the period after the stock reform, stock prices have a positive impact on stock market turnover and stock market returns.
Determination of Total Sulphur and Chloride in Solid Biomass Fuel by Tube Furnace Combustion-Ion Chromatography
Authors: Wang Shuo , Duan Weiyu , Cao Cong , Yang Zheyuan , Lv Huanming , Qiu Zhaojun
Published: March 2020

A tube furnace combustion-ion chromatography method for the determination of total sulfur and chlorine in biomass solid fuel were established. Taking 0.15% hydrogen peroxide as absorption liquid, the sulfide of the sample is converted into sulfate ion after combustion. The total sulfur and chlorine content in the biomass solid fuel is determined by ion chromatography. Under the optimized chromatographic conditions, the detection limit of sulfate ion chromatography is 3.1 mg / kg and the detection limit of chlorine is 4.6 mg/kg with the linear relationship in the range of 0.05-10.00 mg/L. The relative standard deviation of precision and repeatability is less than 5%, the average recovery of total sulfur and chlorine were 97.9% and 96.6%. This method is simple, rapid and reproducible. It can be used for the determination of total sulfur and chlorine in biomass solid fuel.
Ultrasound Bionic Eye Design Based on Adaptive Control Algorithm
Authors: Song Qianqian , Lv Ke , Li Shengde
Published: March 2020

In order to solve the pathological diagnosis of wrist and other local human tissues, an adaptive motor control algorithm based on Markov chain is proposed in this paper. The design of ultrasound bionic eyes can meet the needs of local ultrasound diagnosis in community hospitals. It has strong applicability and high cost-effectiveness, and has certain popularization value.
Evaluation of Landslide Susceptibility Based on Logistic Regression Model
Authors: Du Zhen , Zhang Biao , Hu Hong , Bao Junji , Li Wenbin
Published: March 2020

A lot of methods can be used for landslide susceptibility evaluation, such as support vector machine model, artificial neural network, etc. These models have good modeling effect, but often have the problem of low modeling efficiency. Hence, this paper proposes a simple and effective model of landslide susceptibility evaluation - Logistic regression model. The Ningdu county of Jiangxi province in China, with 297 recorded landslides, was used as study case. The 6 environmental factors including elevation, slope, profile curvature, distance to rivers, lithology and NDVI were extracted in this study. The analysis showed that the significance of Profile curvature was greater than 0.05, and there was a collinearity problem, so it was excluded. After the establishment of the factor evaluation system, the prediction rate curve is used to evaluate the accuracy of the model. The results show that the AUC value of the prediction rate curve of logistic regression model is 0.864, indicating that the evaluation accuracy of logistic regression model is high and the modeling is reasonable. In addition, landslides in the study area are mainly distributed along both sides of the rivers, and elevation and lithology play a major role in the occurrence of landslides.
Analysis of water use efficiency and influencing factors of agricultural total factors in Beijing-Tianjin-Hebei region
Authors: Fang Jinghui
Published: March 2020

In this study, super efficiency SBM-DEA model was used to estimate the total water use efficiency of agricultural factors in the Beijing-Tianjin-Hebei region from 2000 to 2013, and on this basis, panel Tobit model was used to test the influence of natural conditions, water conservancy facilities, agricultural production conditions and social and economic conditions on the total water use efficiency of agricultural factors. The results show that although the overall water use efficiency of agriculture in Beijing-Tianjin-Hebei region is higher than the national level, there is still room for improvement. In the future, it should strengthen the protection and cooperation of agricultural water resources and water-saving technologies in the three regions. shared; The ratio of groundwater to water supply structure and the price index of agricultural production materials have a significant positive impact on the water efficiency of all-factory agriculture in Beijing-Tianjin-Hebei. The reservoir capacity, animal husbandry and fishery account for the proportion of total value of agricultural output the per capita cultivated land area, and the per capita net income of rural households. The quality of rural labor has a significant negative impact on the water efficiency of all-factory agriculture in Beijing, Tianjin and Hebei.
Study on the Migration of Heavy Metals in Different Substrates of Wetland System
Authors: Cao Tingting , Chen Aixia , Li Juan
Published: March 2020

In order to study the solidification characteristics of heavy metals in different matrices, this paper intends to study the migration and distribution characteristics of heavy metals such as Cd, Cr, Pb, Zn, Cu in different matrix ratios of wetland systems. The vertical subsurface flow process (bean stone+gravel hollow brick) matrix, horizontal subsurface flow process (sand+slag+crushed hollow brick) matrix has better accumulation effect on Zn; vertical subsurface flow process (bean stone + gravel) matrix has more cumulative effect on Pb Good; the accumulation effect of Cu and Cr on different substrates is not obvious; the accumulation effect of horizontal subsurface flow treatment unit (sand + slag + gravel) on Cd is better than that of (sand + slag + gravel hollow brick) matrix. The content of Cd, Cr, Pb and Zn in the matrix of vertical subsurface flow (bean stone+gravel) is significantly correlated with the distance along the path. The content of Cd, Pb and Zn in the matrix of (bean stone+gravel hollow brick) is related to the distance along the path; the content of Cd, Cr, Zn in the horizontal subsurface flow process (sand+slag+gravel) matrix is significantly correlated with the distance along the path, (sand + slag + gravel hollow brick) matrix, (bean stone+slag) matrix Cr The content of Cu, Pb and Zn is significantly correlated with the distance along the path. The content of Pb and Zn in the matrix of sand (gravel + gravel) is significantly correlated with the distance along the path.
Experimental Study of Imbibition with Normal Fracturing Fluid in Low-permeability Reservoirs
Authors: Huang Feifei , Pu Chunsheng , Lu Leichao , Yan Huanfeng , He Xiaolong , Liu Bo
Published: March 2020

As the volume of fracturing fluid injected in the formation is getting larger and larger, there is more attention paid to the imbibition efficiency of the broken fracturing fluids. The fracturing fluids, including water-base gel fracturing fluid, thickened water fracturing fluid, slippery water fracturing fluid, emulsified fracturing fluid and clean fracturing fluid were chosen to do the spontaneous imbibition experiment with natural core samples from the Ordos Basin. Furthermore, the correlation between the parameters including viscosity, interfacial tension and contact angle and the recovery ratio was studied respectively. The result showed that the broken fracturing fluids of water-base gel and thicken water performed the highest recovery ratio of spontaneous imbibition, which were 23.1% and 20.6% respectively. Meanwhile, the correlations between those parameters and recovery ratio were contact angle, viscosity of broken fluids and interfacial from in turn in the experimental situation. What’s more, both the contact angle and the viscosity showed negative correlation to imbibition recovery ratio while the interfacial tension showed positive correlation. This study provides help to the researchers to understand the mechanism of fracturing fluids imbibition in low permeability reservoirs.
Evaluation of Intensive Land Use and Countermeasure Prospects in Hexi Corridor of China
Authors: Geng Yonghao , Xiao Bingyu
Published: March 2020

Influence of “Belt and Road ” international cooperation initiative is continoualy expanding. Hexi Corridor in China, as an important geographic area of the land Silk Road, its development degree and influence are constantly prominent. In order to promote efficient and intensive development of Hexi Corridor area, the development data of Hexi Corridor area in recent years are collected from several dimensions in recent years. By using entropy method and tobit model, this paper evaluated degree of intensive land use in Hexi Corridor, to find out the experience and shortcomings of urban development in Hexi Corridor.Then the trend of urban land use and urban development in Hexi Corridor are explored and corresponding countermeasures are put forward.
A Cost-Benefit Analysis Model Based on NPV Methods and Full Life Cycle of Land Use Projects
Authors: Qi Xin , Li Xinye , Jin Jinghua
Published: March 2020

If you realize that your sweet house will damage the ecosystem, you must be amazed. In fact, most land use projects around us affect ecosystem services directly and even result in environmental degradation. The environmental cost has caused a reduction in economic benefits presumably, nonetheless, which has never attracted enough academic attention. To show the real economic cost of land use projects, we establish an ecological services valuation model based on the governance cost method. When assessing the environmental costs caused by pollution, we evaluate the paid economic costs for the pollution control and the virtual cost that should have been paid for pollution abatement. When assessing the costs caused by non-pollution factors, we compute the economic value of regional ecosystem service value according to Costanza indicator system and the value of localized carbon storage and carbon sequestration based on the INVEST model.
Research and Application of Information Perception Technology for Mine Safety Helmet
Authors: Yang Yong , Wang Qinsheng , Guo Xiucai
Published: March 2020

Based on wireless sensor network technology in the Internet of Things, this paper studies and designs a mine environment perception system that is used in coal mines. The sense layer adopts the wireless sensor network based on WIFI technology, takes the miner safety helmet as the carrier, integrates the function module with STM32F107 controller as the core, and becomes the mobile node of the underground wireless sensing network, and realizes the monitoring of the miner’s work environment information and the underground personnel positioning. Through the test, the intelligent mobile terminal can actively perceive the surrounding environment of the underground personnel, realize the real-time monitoring and intelligent warning of the gas concentration, carbon monoxide concentration and temperature in the surrounding area of the miners, and can provide the positioning information for the ground-based biter, which is an important supplement to the safety monitoring of coal mine in China.
Study of landslide susceptibility prediction based on information value model: a case study of Ningdu area
Authors: Yan Ziyue , Zhang Biao , Guo Jianfei , Chen Jiawu , Cao Zhongshan
Published: March 2020

The landslide susceptibility prediction(LSP) is of great importance to the prevention and control of regional landslide geology disasters. Taking Ningdu County of Jiangxi province as an case, this study obtains a total of 297 landslide locations in the study area and selects ten conditioning factors (elevation, slope aspect, slope, profile curvature, plan curvature, topographic relief, distance to rivers, lithology, NDVI, NDBI). The information value model(IVM) is used to predict the landslide susceptibility and the receiver operating characteristic curve (ROC) is adopted to evaluate the prediction accuracy of IVM. The result shows that the area under ROC (AUC) value of IVM is 0.838. It can be seen that IVM has a good prediction accuracy and also obtains a reasonable distribution characteristics of landslide susceptibility.
Multi-body dynamics simulation and analysis of a nuclear power waste crane
Authors: Zhang Yu , Li Baoqun , Gong Yajun , Zeng Baoping
Published: March 2020

The dynamic performance of nuclear waste crane is an important index to ensure its safety and reliability. In this paper, a multi-body dynamic model of nuclear power waste crane is established by using the method of Udwadia-Kalaba equation, and its simulation analysis is carried out to verify the feasibility of the application of this method in heavy equipment design.
Simulation and Result Analysis of Bridge Backfilling Process Based on ANSYS
Authors: Cheng Bin
Published: March 2020

The covered bridge of corrugated steel has many advantages, one of which has good adaptability to deformation. It should be noted that as a flexible arch structure, it is necessary to pay attention to the backfilling and expansion scheme. According to the available data, it is clear that modern researchers conduct analysis and research on experimental models and actual projects, and test the deformation and internal forces of the bridge and culvert structure of the backfilling project, but there is no impact on the backfill construction structure. Mechanics factors are studied and analyzed. In order to make up for this gap, this paper uses finite element software to build the model based on the actual engineering, and then calculates a variety of different backfilling schemes to study the influence of internal force and structural deformation of different backfilling schemes on structural mechanics. Researchers provide relevant references for research.
The Ventilation Improvement Assessment of Sky Gardens-A Case Study of Hysan Place
Authors: Liu Siqi , Huang Guanqi
Published: March 2020

With the modernization and urbanization in recent decades, a mounting number of buildings has been built. Due to the limited land, these buildings were built higher and higher and side by side which created ‘Wall Effect’ blocking the wind and reducing air ventilation. It eventually led to bad thermal comfort of people. Therefore, sky gardens are increasingly important today, as they can significantly contribute to improving air ventilation by reducing ‘Wall Effect’. In order to know better about the influence generated by sky gardens to natural ventilation improvement, I selected the Hysan Place as a case study based on CFD simulation. I built two models --- the original model and the model without sky gardens for the simulation in different height. By comparison of different models, I found that the sky gardens of Hysan Place did can slight improve air ventilation of surrounding areas. Sky garden is an effective method to alleviate urban heat island effect, which is important to improve urban living quality, especially extreme high construction density.
Wind Tunnel Experimental Simulation of Downburst Outflow Based on Wall Jet Model
Authors: Hong Yiran , Li Cangmao , Xiao Yunfeng , Zhou Jiao
Published: March 2020

In order to study the wind field characteristics of downburst wall jet section, the wind tunnel test of downburst wall jet section was carried out by modifying the traditional wind tunnel with fan and nozzle. By using characteristic length and characteristic velocity to deal with it dimensionless, the consistency and effectiveness of simulating the downburst section by using wall jet steady state wind tunnel test were verified according to the test results of different rough wall jet flows downstream. Consistency and validity; by increasing the roughness element to change the blocking ratio at the bottom of the wind tunnel and increase the disturbance of the incoming flow, the topography of various atmospheric boundary layers is simulated, and the effects of the surface roughness of the wall jet section on the horizontal and vertical profiles of the wall jet area, the maximum wind speed height and the wall flow field in downburst flow are studied. The experimental results show that the dimensionless treatment of wall jet with different roughness has certain self-similarity. With the increase of wall roughness, the turbulence near the wall increases significantly, the internal and external peaks of the turbulence profile increase significantly, and the velocity at the lower part of the wind profile decreases gradually, which has a significant impact on the characteristics of the near-wall wind field.
Modeling and Jitter Suppression Analysis of a Lifting Multistage Hydraulic Cylinder
Authors: Luo Chunlei , Ling Chunlai , Luo Daming
Published: March 2020

In view of the abnormal phenomena in the movement of the 4-stage hydraulic cylinder, this paper establishes the basic motion model of the multi-stage hydraulic cylinder by melting point nodal cavity method, and analyses the variation law of its external load. On this basis, the erection process of the multi-stage hydraulic cylinder is simulated and analyzed by AMESim, and it is found that the sudden change of pressure at the change of the stage will cause the vibration of the multi-stage. Found that the abnormal vibration of the third piston occurs during the retraction process of the hydraulic cylinder, which is caused by the insufficient guide distance of the 3 stage piston of the multi-stage hydraulic cylinder. The sealing conditions of the piston and the guide sleeve are improved by increasing the guide length of the piston appropriately, and the correctness of the improved scheme is verified by the way of simulation, that is, it can effectively suppress the vibration of the third piston. Vibration occurs during retraction. Some improvement suggestions are provided for vibration reduction of multi-stage hydraulic cylinder.
Research on the Age of Coal-bearing Strata in Beishan basin group of Gansu-Inner Mongolia Region
Authors: Niu Haiqing , Han Xiaofeng , Cui Haifeng
Published: March 2020

Although the coal measures strata of Beishan Basin group in Ganmeng were discovered earlier, due to the low degree of geological work and the lack of comprehensive data system research, the geogical age of coal measures strata is not consistent. In order to clarify the age of coal measures strata in the basin group and the exploration prospect of coal, uranium, oil and other resources in the research area, the geological age of coal measures strata in Beishan basin group was Researched, based on the systematic summary of paleontology, tectonic evolution, lithologic characteristics and coal and rock industrial characteristics, combined with the analytical and laboratory data supplemented by the research team, the comprehensive analysis shows that: the age of the formation of the coal measures in Beishan basin group should be the early cretaceous of the Middle Jurassic.The geogical age of the coal measures in southern of the basin group is the Jurassic, and the northern coal measures are mainly early cretaceous.The western margin of Yinhe basin is adjacent to Beishan basin group, and the coal measures strata are comparable to each other, which can provide the basis for the age of coal measures strata revealed by drilling holes in the western margin of Yinhe basin.
Analysis of Transient Pressure Source Characteristics of Trim Balance Pipeline System
Authors: Shen Wei , Hu Zhi
Published: March 2020

Based on the hydraulic calculation of AMEsim software, adjust the pipeline and working conditions of the trim balance system, and explore the influence of water transfer pressure, pipeline length and valve closing time on the transient pressure fluctuation during the working process, and obtain the pressure change law and corresponding Relationship, according to the analysis gives preliminary optimization suggestions, sums up the scheme and scope of reducing water transfer pressure, shortening pipeline length, extending valve closing time, providing reference for optimizing system design and control, and proposing control from noise source level The method of transient noise caused by water hammer phenomenon provides an idea for controlling the transient noise of pressurized pipelines of ships and underwater vehicles.
Research on Optimization Design of Dual Derrick for Offshore Platform Based on RSM
Authors: Jiang Faguang , Zhang Min , Yang Xiuju , Zeng Xingchang , Liang Zheng , Li Dayang
Published: March 2020

The structure of dual derrick for offshore platform is optimized in this study. The special arrangement is establishing a mathematical model to minimize the stress and mass of dual derrick. The beam is divided into vertical, horizontal and oblique beam. The beam’s section sizes are design variables. After calculating test point data by ANSYS under operating conditions, the multi-objective optimization method is adopted to solve the optimal section size based on the regression equation of RSM fitting influence factors and response variables. This study will check the safety of the optimized dual derrick under storm self-storage conditions. The result shows that dual derrick meets safety requirements under extreme conditions, the optimized structure’s mass reduced about 21.2%, and the maximum safety factor increased about 8.3%.
Study on the Purification of TN in Different Concentration Waters by Artificial Floating Bed
Authors: Chen Hongbing , Deng Meie , Lu Jindeng
Published: March 2020

The artificial floating bed reduces the nitrogen, phosphorus and organic pollutants in the water by the absorption of the roots of the plants, thereby purifying the biological control of water quality. In this paper, by using four different concentrations of contaminated water samples, the static test of Ipomoea aquatica. was carried out on a floating bed. The growth characteristics and main water quality indexes of the plants were measured at intervals of 10 days. The experimental period was 60 days, and the amaranth was quantitatively analyzed. The purification law of TN in water samples with different concentrations was analyzed, and the dynamic changes of nutrients in different tested water samples were analyzed, and the purification equation was constructed. The results showed that the floating bed cultivation of leek can absorb, adsorb and degrade the nitrogen in the water sample, carry out metabolic activities, and synthesize the substances needed by itself, which is closely related to the growth, and the TN concentration and the growth time of the plant are significantly negative.
3D Simulation of Flight Control System for Quad Tilt Rotor UAV Based on Flightgear
Authors: Wang Zhigang , Li Jianbo
Published: March 2020

The quad tilt rotor (QTR) has complex dynamics characteristics, especially in conversion mode. It is difficult to model the QTR dynamics and the environmental factors have a great influence on it. To solve the problem of control in conversion mode of QTR, this paper carries out the design of the controller based on improved active disturbance rejection control (ADRC). We propose the 3D simulation based on FlightGear to better reflect the state of quad tilt rotor in conversion mode. The simulation results show that the flight control system is effective. The 3D real scene simulation can directly observe the status of every control mechanism, which can provide a better and more intuitive analysis for manipulation strategy.
Structural Design and Mechanical Analysis of Horizontal Transport Device for Spacecraft Marine Transportation
Authors: Dai Hailin , Du Ruizhao , Jiang Xu , Li Yushuang
Published: March 2020

As a large spacecraft used to transport up-going cargo and test load equipment to space, cargo spacecraft is an important means of space transportation for material transportation and replenishment of China’s space station in the future. The cargo spacecraft is the first large-scale spacecraft to be transported by sea in China. In this paper, a cargo horizontal conveyor is designed. The mechanical structure of the device is introduced, and the finite element analysis is carried out. The results show that the structure of the horizontal conveyor is reasonable, and its mechanical properties meet the requirements of use.
The Mathematical Route Model Based on Analytic Hierarchy Process
Authors: Pan Zeen , Yue Chuanmengzhen , Zhang Yanbing
Published: March 2020

In 2017, a devastating hurricane attacked the United States territory of Puerto Rico and caused severe damage. In the meanwhile, it set great obstacles to the aid work. Therefore, the non-government organization puts forward one possible method that we would use the drones to succour the disaster area. Hence, our model aims to develop a comprehensive program to tackle this issue. Our model has three parts. First of all, we compare the weighting average of all requirements and then select the drones with high performance via the analytic hierarchy process. After considering the distribution of the hospital, we formulated two possible transporting strategies and the corresponding transporting sub-route, including star routes and the ring routes. In the third part, we obtain some intuitional constraints from the routes via some mathematical definitions, directly showing the performance of the drone under the effect of these external causes.
Design and Research of Infusion Monitoring System Based on OneNET Platform
Authors: Zhang Le , Wang Zhongwen , Xiu Xiang , Li Quanqiang
Published: March 2020

This paper proposes an infusion monitoring system based on OneNET platform, with Arduino as the core control device, infrared tube to detect the drop rate and number of drops of infusion, non-contact liquid level sensor to detect residual liquid level, load cell detection drug The weight of the liquid, OneNET as the host computer cloud platform, upload data through the ESP8266 module and parse the issuing command, drive the step-by-click to control the drop rate of the drug, and when the value exceeds the standard, the message will be automatically pushed, and the medical staff can grasp the patient infusion in time. The real-time situation ensures the safety and reliability of the infusion process.
Study on the coupling relationship between the efficiency of regional Sci-Tech innovation and Sustainable development
Authors: Zhang Yusheng
Published: March 2020

Based on the Slack Based Measure model and the coupling degree model, this paper calculated the efficiency of scientific and technological innovation and sustainable development of 13 cities in Beijing, Tianjin and Hebei from 2008 to 2017, and analyzed the coupling relationship between their efficiency. The results show that: 1) from 2008 to 2017, the scientific and technological innovation efficiency and sustainable development efficiency of the Beijing-Tianjin-Hebei urban agglomeration maintained an overall upward trend, and the overall coupling degree of the urban agglomeration was in a fluctuating growth trend; 2) the change process of coupling type from medium and low level coupling at the beginning to medium and high level coupling later. In addition, the coupling development level between Beijing and Tianjin is good, while Hebei’s overall level is low.
Research on Image Segmentation based on Full Convolutional Neural Network
Authors: Guo Yanan , Zhao Zengshun , Wu Zuohong
Published: March 2020

Image segmentation technology is an important branch in the field of computer vision. Image segmentation is the basis of image analysis processing, and image segmentation effect directly affects image subsequent processing. Aiming at the problem that the segmentation method based on traditional machine learning is not accurate, the edge information is lost and the robustness needs to be improved, this paper proposes an image segmentation algorithm based on improved full convolution neural network. The algorithm utilizes the better feature extraction ability of the deep learning model and the sensitivity of the cluster segmentation to the edge information, and further assists the segmentation with the Ncut algorithm. The experimental results show that compared with the traditional convolutional neural network image segmentation algorithm, the algorithm finally achieves higher segmentation accuracy. From the overall analysis, the segmentation method proposed in this paper is better than other methods.