bluuebunny/crossref_metadata_2025 huggingface dataset:
Study and optimization of styrene waste gas purification process in bioscrubber
Authors: Liu Shuo , Ren Ailing , Chen Zitong , Guo Bin , Hou Xiaosong , Gu Dandan
Published: May 2020

In order to explore the removal effect of styrene waste gas by bioscrubber with multi-sided hollow spheres as filler, the residence time, circulating liquid pH and gas-liquid ratio were taken as experimental factors, and the removal rate of styrene was taken as the response value. The experiment was designed according to Box-Behnken, and the response surface analysis method was adopted to establish the corresponding predictive regression model and conduct the analysis of variance. The optimization module of Design-Expert software was used to optimize the optimal combination of all process parameters: the residence time was 43.18 s, the pH of circulating liquid was 7.61, and the gas-liquid ratio was 3.95. Under this condition, the removal rate of styrene was 88.52%. The influence of different fillers on the purification performance of biological tower was compared and analyzed, so as to provide the basis and basis for the application of efficient VOCs processing technology in bioscrubber.
Study on the Evaluation Method of Marine Comprehensive Carrying Capacity: Taking Yancheng Sea Area of China as an Example
Authors: Jin Ru , Li Fei , Gao Yijian
Published: May 2020

With the rapid growth of China’s economy since the start of the 21st century, the development and utilization of coastal areas have also experienced rapid expansion. With the continuous and high-intensity agglomeration of social and economic factors such as city, industry and population in coastal areas, the fragile and sensitive coastal ecosystem is under great pressure of resources and environment. In this study, we propose a theoretical and methodological framework for the comprehensive evaluation of the sea area carrying capacity to systematically evaluate the coupling and coordination of resources, environment and development in coastal areas. This framework includes 12 representative indicators of three factors: spatial resource endowment, ecological environment pressure and development and utilization intensity. Taking Yancheng sea area of China as an example, we analyzed the development and change of sea area carrying capacity from 2000 to 2015. The results show that the carrying capacity score of Yancheng sea area decreased from 3.12 in 2000 to 1.58 in 2015, indicating that the comprehensive carrying capacity of the sea area in this period is facing an unsustainable severe situation. At the same time, with the development intensity index score increasing from 0.62 to 0.92, the resource endowment index and ecological environment index scores decreased from 0.98 to 0.75 and 0.95 to 0.70, respectively, indicating that the continuous high-intensity development activities in Yancheng sea area during this period put great pressure on resources and environment. This framework can provide technical support for the balance of economic development and the protection of resources and environment in coastal areas.
Performance evaluation methods and effect analysis of VOCs-related enterprises in key industries
Authors: Hou Xiaosong , Guo Bin , Ren Tianyi
Published: May 2020

VOCs pollution has a significant impact on the atmospheric environment. Volatile organic compounds (VOCs) are important precursors for the formation of fine particulate matter (PM2.5) and ozone (O3), and have become one of the main pollutants of atmospheric pollution. In order to further improve the ambient air quality, it is urgent to comprehensively strengthen the comprehensive management of VOCs in key industries. Based on the characteristics of pollution production in VOCs-related industries, focusing on source control, unorganized collection, and end-of-line governance, develop a multi-factor and multi-indicator performance evaluation system, and use field surveys-field monitoring-site scoring-suggestions-corporate rectification Performance evaluation of key emission enterprises. On-site assessment was conducted on 380 companies in key industries related to VOCs, such as pharmaceuticals, pesticides, and chemicals, and 2,396 suggestions on environmental protection related rectification were put forward to guide enterprises to upgrade and achieve precise and scientific pollution control. After the improvement of deep governance, the calculation of emission reduction performance of VOCs-related companies shows that the annual emission reduction of VOCs in the pharmaceutical industry is 722.113 t·a−1, the annual emission reduction of pesticide industry is 842.555 t·a−1, and the emission reduction of chemical industry is 1498.835 t·a−1. The annual emission reduction is 3227.63 t·a−1, and the source control emission reduction is 6929.862 t·a−1. The total reduction of VOCs in 2019 is 13220.994 t·a−1.
Study on defining developmental basement and treatment measures of collapse columns in Pingshuo Mining Area
Authors: Ding Liyun
Published: May 2020

In order to realize the rapid treatment of concealed collapse columns in the 19108 Working Face of Anjialing No.1 Underground Mine in Pingshuo Mining Area and achieve safety mining of the working face, the method of “treatment combining with exploration and design” was used to grout and treat the collapse columns. Based on the analysis exploration data and the borehole verification data after grouting of the collapse columns, and combined with the previous geological data of Pingshuo Mining Area, the basic formation conditions and distribution regularities of the soluble-salt-type collapse columns in Pingshuo Mining Area were studied; and hydrogeological characteristics of the soluble-salt-type collapse column was obtained; and targeted treatment measures were put forward. The results showed as follows: (1) The type of collapse columns developed in the Pingshuo Mining Area is a soluble-salt-type, the basement of collapse column developed in Carboniferous coal measure strata; (2) The concealed collapse columns in the 19108 Working Face are all soluble-salt-type sinking column, which does not pass through the Ordovician limestone karst aquifer; (3) The treatment measures for the collapse columns of the working face were effective.
Study on the effect of light burned magnesia on the properties of sleeve grouting materials
Authors: Zhang Pan
Published: May 2020

The effect of light burned magnesia on the performance of sleeve grouting under different content gradients was studied. The results show that the light burnt magnesia content has no significant effect on the fluidity of the grout when it is less than 5%. The incorporation of light burned magnesia improves the compressive strength of the sleeve grout and the expansion rate of 14d∼56d in restrict condition. The incorporation of light burned magnesia can effectively solve the problem of shrinkage of the grouted slurry volume in the later stage and improve the compressive strength of the sleeve grout.
Research on Electricity Trading Service Platform Based on Energy Internet
Authors: Wu Zechen , Chen Kening , Fan Menghua , Qu Haoyuan , Li Rui
Published: May 2020

With the development of energy internet and modern information technology, emerging market entities such as energy storage, distributed generation and electric vehicles play increasingly important roles in electricity market, thus the demand on a more powerful trading platform is prominent day by day. This paper puts forward a new electricity trading service platform based on energy internet, analyzes the main functions, overall architecture, and market entities of the platform. The main functions of the platform include wholesale market electricity services, retail market electricity services, power supply services and value-added services. We also study the trading mechanism for emerging market entities when participating in regulated electricity market, medium and long-term market, generation rights market and spot market. This research helps improve the efficiency of electricity market operation, promotes the development of emerging market entities, and provides convenience to power users.
Application and Implementation of General Service Protocol in Transparent Access Framework
Authors: Zhang Hong , Huang Haifeng , Yang Cao , Xun Dou , Wang Shizhen , Ren Shuhui
Published: May 2020

In order to break through the bottleneck of grid data use, support the cross-business data access requirements, and adapt to the future “physical distribution and logical unification” architecture, this paper starts with the current requirements for wide area data transparent access, analyzes from three aspects of architecture, data, and business. The service framework for transparent access to wide area data is constructed by applying the general service protocol of the power system in the existing smart grid general standard system. This frame is applied to scheduling system and forms the overall construction scheme of a transparent access framework. Besides this, it determines the unified definition of the business service model and service interface in combination with the general business access requirements. At the same time, the implementation process of distributed business data stream processing technology and wide area service proxy interaction method is also proposed in the article, and a method of transparently accessing service-oriented and existing application functions in the transition phase is proposed. It provides technical support and implementation basis for building a transparent access framework for wide area data.
Kinetics of s catalyzed oxidation of Zinc heteropolyate of Supercritical water of POPs
Authors: Liu Na-Na , Yang Zhou
Published: May 2020

The kinetics of persistent organic pollutants (POPs) degradation has been the focus of wastewater treatment in recent years, and supercritical water oxidation is a green and efficient organic waste treatment method developed in recent years. The kinetics of degradation of POPs by catalytic oxidation of near-critical water zinc heteropolysate was studied. The reaction order, apparent activation energy and the feedback of three factors to catalytic degradation were measured. In this experiment, under the conditions of temperature 280∼360°C, pressure 6.9∼ 20.3MPa and reaction time 5∼30min, using Zn1.2PW12O40 as catalyst and hydrogen peroxide as oxygen source, the kinetics of supercritical water catalytic oxidation of 4,4 ‘-dibromobiphenyl was studied. Through MATLAB software fitting data, it was found that: Using zinc phosphotungstate Zn1.5PW12O40 catalyst, 4,4 ‘-dibromobiphenyl reaction order is 1.70, apparent activation energy is 44.04 kJ/mol, therefore, phosphotungstate as catalyst can reduce the activation energy of POPs oxidative degradation in near-critical water.
Research on the method and data analysis of wind power characteristic test
Authors: Hu Ning
Published: May 2020

The actual operating power curve of wind turbine is affected by many factors. Therefore, it is difficult to measure the power characteristics accurately. Firstly, this paper mainly analyzes the main factors that affect the power curve of wind turbine in the operation process, develops the power curve test scheme of wind turbine, and establishes the simulation analysis model. Finally, combined with the actual operation of the wind farm, the field test of a certain type of wind turbine is carried out. The data results verify the validity of the test method, and provide reference for improving the operation efficiency of wind farms.
Numerical Simulations of Factors Affecting Stray Current Corrosion on Pipeline
Authors: Yang Yong , Zeng Weiguo , Wang Li , Liu Yongguo , Ji Jianli
Published: May 2020

Stray current can cause severe corrosion on buried steel pipelines. To investigate the corrosion effect of stray current, originating from impressed current cathode protection system of pipeline, on interference pipeline, a numerical model based on boundary elements using commercial software COMSOL Multiphysics was developed to simulate corrosion potential and stray current density distribution on interference pipeline. The model geometry was comprised of the cathodically protected pipeline, interference pipeline and an auxiliary anode. The effects of crossing angle and crossing distance of the two pipelines, output current and location of anode, soil resistivity and coating surface resistivity were investigated. The results demonstrated that the impressed current cathode protection system substantially affects the corrosion potential and current density distribution of interference pipelines in vicinity of crossing. The crossing angle and vertical distance of two pipelines have no important influence while the anode output current, anode location, soil resistivity and coating surface resistivity have significant influence to stray current corrosion on interference pipeline.
Study of Nature Gas Distributed Energy System development space
Authors: Ye Hui-Nan , Hao Yu-Xia , Zhou Qian
Published: May 2020

Distributed natural gas energy plays an important role in the world low-carbon energy system. The development prospect of global distributed natural gas energy is considerable. And the installed capacity of natural gas distributed energy system (NG-DES) in China is increasing year by year. It’s urgent to clarify the development space of NG-DES for further healthy development. From the perspective of demand supply, China’s natural gas distributed energy development space is affected by social energy demand and other energy development levels. The application scenarios of NG-DES can be divided into commercial complex, industrial park, residential building, Internet data center and other application scenarios. This study summarizes the installed capacity of natural gas distributed energy in different projects under different scenarios, and calculates the new development space of natural gas distributed energy in China in 2020-2025. The results provide a reference for the rational and orderly development of distributed natural gas energy in China.
Spectrophotometric Determination of Acetylcysteine by Cu(I) –Neocuproine
Authors: Tu Changqing , Wen Xinrong
Published: May 2020

Spectrophotometric determination of acetylcysteine by Cu(I)–neocuproine is studied. The hydrosulfuryl(-SH) in acetylcysteine can reduce Cu(II) to Cu(I), then the chromogenic reagent of neocuproine react with Cu(I) to form the yellow complex. The yellow complex has the maximum absorption at 453 nm, and the amount of yellow complex is proportional to the amount of acetylcysteine in a certain range. Therefore, the content of acetylcysteine in medicine can be determined by measuring the absorbance of the yellow complex.
Experiment and application of movable gel prepared by recycled produced water
Authors: Tang Yajuan , Zhao Dongyan , Gao Shanshan , Lei Xiaoyang , Lu Miaosen , Zhang Tiantian , Zhao Shuhua , Wang Zhiqiang
Published: May 2020

Cations such as Ca2+, Mg2+, Fe2+ etc. in recycled produced water seriously affect the viscosity and stability of movable gel. Four types of polymers were evaluated in laboratory including comb-shape polymer and hydrophobically associating polymer. By analyzing two types of polymers’ molecular structures, it showed that comb-shape polymer was easier to improve its properties by cross-linking reaction, and the viscosity of the hydrophobically associating polymer mostly came from the viscosity of molecular structure. Cross-linking reaction contributed little to the viscosity of hydrophobically associating polymer. The movable gel was prepared in salt water of TDS=2.64×104mg/L by using comb-shape polymer B and modified phenolic resin prepolymer. By introducing rigid benzene ring structure, the salt tolerance and long-term stability were significantly improved. The viscosity of retain rate was more than 70% after 60d under 90°C. Field application of 3 wells showed that qualification rate of preparing movable gel was 100% and oil increment was 3020t.
Influencing factors on low-temperature deNOx performance of foamed metal based catalytic filter
Authors: Tian Zhen , Li Jian
Published: May 2020

A series of supported vanadium-titanium denitrification catalysts were prepared by impregnation method with foam metal as carrier for NH3-SCR of NOx at low temperature. Effects of pH, slurry concentration, catalyst loading rate, face velocity and O2 concentration on catalytic performance were studied. The results showed that when immersion concentration was 30g/100mL and filtration speed was 0.7m/min, the pressure drop was 300Pa and NOx removal efficiency was 98% at 200°C. The foam catalytic filter was put into the bag dust collector, which had the function of simultaneous removing particulate and NOx. When filtration velocity was 0.7m/min, NOx removal efficiency reached 95.5% at 200°C and it had good water resistance. The results provided the basis for further pilot experiment.
Experimental study on scale and corrosion inhibition of circulating cooling water in power plant
Authors: Zhou Shiyu , Zhang Chunbo , Zhang Jianxin , Liu Xiyang , Hu Jingting , Zeng Qianhui , Li Yueyang
Published: May 2020

This paper introduced the research process of the static tests and the dynamic simulation tests for the circulating cooling water witch used in a power plant. The appropriate scale inhibitor and the dosage were screened based on static tests (limited carbonate hardness test, pHc test,corrosion inhibition test, etc.), then the dynamic simulation test was used to simulate the practical system operation conditions, investigated the effect of scale inhibitor. The operating parameters obtained from the study are beneficial to water conservation, reduce the corrosion and scaling of the circulating water system, and have directive significance for the safe and economic operation and sustainable development for the power plant.
Study on the relationship between the measurement of household carbon emissions and spatial correlation in Nanjing——Taking 4993 residential quarters as examples
Authors: Huang Yixin , Xia Xiangchen , Lu Geng , Li Yang
Published: May 2020

In order to explore the spatial distribution of household carbon emissions of Nanjing, 4993 residential quarters in Nanjing are used as the research objects, the IPCC method is used to construct the calculation formula of living carbon emissions to calculate the amount in Nanjing, and the ArcGIS software is applied to carry out spatial analysis. The results show that the total carbon emissions of residential quarters in Nanjing in 2017 was 272,632 tons, of which Jiangning District, Gulou District, Pukou District and Qinhuai District had more carbon emissions, accounting for 53% of the total; The spatial distribution had a concentrated trend, and the central urban area exhibited a “low-to-low” correlation, while the outer area of the central urban region presented a “high-to-high” positive correlation. Finally, countermeasures and suggestions are proposed for the planning and emission reduction of residential quarters in Nanjing.
Research on Hierarchical Coordination and Coordinated Realization of DC System
Authors: Maalla Allam
Published: May 2020

DC converter station needs to consume a large amount of reactive power when transmitting active power. Insufficient or excessive reactive power will cause fluctuations in the AC voltage, which will affect the safety and stability of the entire system in severe cases. Simulation results verify the correctness, robustness, and superiority of the proposed active power allocation principle. This paper proposes a reactive power control strategy by fixing the position of the converter transformer tap and increasing the trigger angle/cut-off angle during the low-load operation of the DC transmission system.
Treatment of Refined oil depot wastewater
Authors: Wu Mengjie , Liu Zhen
Published: May 2020

In the treatment of oily wastewater, the water quality and quantity must be clarified. First, the physical form and chemical composition must be clarified, and then the drug can be treated according to the characteristics of various pollutants. The current treatment of wastewater from refined oil storage tanks is still dominated by the old three sets (sedimentation, flocculation, and biological methods). The current application research is mainly an optimization of the old three sets, such as the application of hydrocyclones, the preparation of new coagulants, the use of efficient air flotation devices and efficient microorganisms. However, the difficulty of wastewater treatment of refined oil depots is COD(Chemical Oxygen Demand). Due to the characteristics of oily wastewater, there are some limitations in biological methods. At present, the advanced oxidation method is not mature and the treatment cost is high, which restricts the advanced oxidation method to treat oily wastewater. This paper describes the source of oil products, the generation of oil-bearing wastewater and various processes of oil-bearing wastewater treatment. Finally, some ideas of advanced oxidation technology to remove COD from oil-bearing wastewater are put forward.
Design of Flood Control Hydrological Information Measurement and Forecast System in a Certain Area
Authors: Li Dacan , Gong Yuanyuan , Li Dezheng , Shen Shufei , Wang Lei
Published: May 2020

In recent years, hydrological information in this area has played an important role in flood control and drought relief, and achieved good social, economic and ecological benefits, but there is still a certain gap with the latest requirements of the state in hydrological. With the rapid expansion of hydrological information collection stations and the rapid increase of station network density, considering the current needs of local hydrological information management, hydrological management departments and flood control and Drought Relief Command departments, this paper uses software engineering method to design a hydrological information measurement and reporting system. The system realizes centralized management of water information, real-time information query and analysis, dynamic monitoring and alarm, auxiliary decision-making, remote data collection and other hydrological business functions and provides decision support for leaders of all departments. It plays an important role in the success of flood control and drought relief work to minimize the loss of disasters and ensure the safety of people’s lives and properties with the least human and material resources.
Research and Design of a Water Supply Dispatching System in a Certain Area Based on Big Data Technology
Authors: Li Dacan , Gong Yuanyuan , Shen Shufei , Li Dezheng , Ren Minmin
Published: May 2020

Water supply dispatching system is an important part of urban infrastructure. Water supply plays an indispensable role in people’s daily life and plays an important role in social security, stability and development. Based on the existing GIS technology, SCADA technology, and water conservancy model technology, relying on the Internet, this paper establishes a water supply dispatching system in a certain area to realize the network work of water supply enterprises and the network cooperation among departments. It solves the problems of inaccurate operation data and low economic benefits that have puzzled the management departments for many years, realizes scientific decision-making and management automation, improves management level, work efficiency, economic and social benefits of water supply enterprises, and improves market competitiveness of water supply enterprises. Besides, it solves the problems of data sharing and interconnection between water supply business management system and external systems.
Research on the construction technology of tunnel-type underground reservoir in island areas
Authors: Jin Qiannan , Weng Yisong , Yao Fengfeng , Hua Lei
Published: May 2020

The water consumption structure and water demand of remote islands with homestay tourism as the main industries were calculated and analysed. The result showed that there were obvious seasonal differences in the water demand of such islands. Based on the temporal and spatial characteristics of island water resources, it is recommended to build tunnel-type groundwater reservoir, to form the optimal allocation mode of water resources in the surface and underground, dry and rainy seasons and different geographical space. The construction process and technical points of tunnel-type underground reservoir were proposed, which was starting from the whole process including site selection, source determination, clean-up and disinfection, local impermeable, dam-blocking construction, ancillary facilities construction, water level and water quality monitoring and subsequent water purification.
Study on Emergency Plan for Production Safety Accidents in Water Conservancy Industry in Lishui City in the New Period
Authors: Wang Lirong , Zhang Ting
Published: May 2020

At present, the water conservancy industry has not formulated a comprehensive emergency plan for production safety accidents. In order to fully implement the national decision-making and deployment of work safety, and to promote the modernization of emergency management systems and capabilities in the water conservancy industry, it is necessary to carry out related research on emergency plans for production safety accidents in the water conservancy industry. This article takes Lishui City as an example, and expounds the main contents of production safety accidents emergency plan for the water conservancy industry in the new period from the aspects of application scope, working principle, emergency command agencies and duties, and emergency response. The aim is to standardize the emergency management and emergency response procedures for production safety accidents in the water conservancy industry in Lishui City, improve the ability to prevent and respond to production safety accidents, and provide references for other provinces and municipalities to study related plans.
Research progress and numerical simulation of pressure compensating emitter
Authors: Xiao Min
Published: May 2020

The research status of the emitter at home and abroad is described. By reading the relevant literature, the feasibility of the numerical simulation analysis method in the study of the internal flow analysis of the emitter and the optimization design of the emitter structure is obtained. Compared with other emitters, the pressure compensating emitter has the advantages of free flow from pressure change, good anti plugging performance and self-flushing function. The method of combining numerical simulation with PIV (particle image velocimetry) can be used to study it and optimize the hydraulic performance and anti-plugging performance of the pressure compensating emitter.
Analysis on Mechanical Properties of the Buried Pipeline Considering Pipe-soil Interaction
Authors: Liang Li , Gou Wenjin , Tian Dalang , Tian Renjun
Published: May 2020

Mechanical deformation of buried pipeline under vertical load is the result of pipe-soil interaction. In order to reveal the necessity of pipe-soil interaction while investigating mechanical properties of buried pipeline, the ANSYS commercial software is employed to construct pipe-soil interface and simulate pipe-soil coupling effect. With the newly developed model, mechanical properties of pipe under vertical static load are analyzed. Numerical solution is subsequently compared with analytical solution. The results reveal that (1) There is maximum Von Mises stress at internal surface of pipe side under overlying load, and minimum Von Mises stress appears in the pipe shoulder at angle of about 45°to x-axis; (2) The pipe-soil interaction has significant effect on analyzing the deformation and distribution of stress of buried pipeline; (3) Vertical displacement obtained from Marston model is larger than that obtained from newly constructed numerical model; (4) The deformation of pipe is obviously constrained by backfilled earth around the pipe. For a buried pipe, especially the elastic pipe, it is necessary to consider pipe-soil interaction while analyzing its mechanical properties.
Water Management Platform Construction of Zhejiang Province
Authors: Zhao Rongjiao , Zhang Xinhai , Qiu Zhizhang
Published: May 2020

Based on the full deployment of the government’s digital transformation work, and the needs of “smart water conservancy” construction, Zhejiang Province has launched the construction of a water management platform. By constructing a unified water conservancy data warehouse across the province, it solves the problem of the isolation of various types of information resources in the digital transformation of water conservancy, and realizes the collection, exchange and sharing of water conservancy data resources; By constructing a unified water resources comprehensive application portal, a decentralized, independent and single business system is integrated to realize cross department, cross system, cross region and cross level business collaborative processing. The results show that the Zhejiang Water Management Platform has laid the foundation for the digital transformation and modernization of water conservancy in Zhejiang Province, and has accelerated the development of high-quality water conservancy in Zhejiang Province.
Research on Distribution Network Loss Allocation with Small Hydropower Groups
Authors: Liu Jiajun , Yang Xiaoqian
Published: May 2020

On the basis of Longnan power grid with small hydropower groups, this paper proposes a loss allocation method combining marginal loss coefficient method and branch dissipation power transfer component method, aiming at the fact that marginal loss coefficient method does not consider the influence of balancing nodes and different balancing nodes on allocation results. Firstly, starting from the circuit law, Norton’s equivalent is used to equivalent all power supplies to node injection current. Based on the branch dissipation power transfer component method, the network losses that each power supply node including the balancing node should share are obtained. Then, the marginal network loss coefficient method is used to obtain the network losses shared by other nodes except the balancing node. Finally, the calculation and analysis of the Longnan power grid with small hydropower are carried out, which verifies the feasibility of the proposed method and has reference value for the distribution of network losses of other distributed power grids.
H-O isotope characteristics and hydraulic connections of various waters in the Tai’an pumped storage power station reservoir, Shandong province, China
Authors: Zheng Xiaohe , Zhang Xike , Chen Jin , Rao Wenbo , Mao Changping
Published: May 2020

Reservoir leakage is typically a potential risk to reservoir operation in the world. However, due to the difference of climate, hydrology and geology conditions, the patterns and causes of water leakage in different reservoirs are quite different. This study took the Tai’an pumped storage power station reservoir in Shandong Province as an example to analyze the H-O isotope characteristics of various waters in detail. The results showed that the δ18O, δ17O and δ2H values in the reservoir water collected in July were significantly more positive than those in September and October, and other waters also had similar variations. The isotopic difference between September and October was not significant. Isotope analyses showed that water leakage varied with months: in October, well water and leakage water in the right bank gallery and bottom gallery drainage hole 005 did not come from the reservoir, while other waters were closely related to the leakage of reservoir water; in September, well water in the left bank did not originate from reservoir water leakage, while water in the measuring weir behind dam and the right bank gallery drainage hole were closely related to the reservoir water. In July, leakage water in the right bank gallery drainage hole and reservoir water had a close relationship. Our findings are expected to be helpful for guiding the treatment and control of reservoir water leakage.
Application of RS-RF Model in Deformation Prediction of Concrete Dam
Authors: Guo Zhangjun , Huang Huadong
Published: May 2020

The high-performance concrete dam deformation prediction model serves as an important reference for structural safety behavior diagnosis, early warning, and scientific decision-making, and it is also one of the guarantee measures to fully exert the benefits of the project. This paper aims at the subjectivity of factor selection, multicollinearity among factors, and poor generalization of the concrete dam deformation monitoring model. It combines rough set and random forest theory to achieve feature attribute reduction, importance evaluation, and high-precision prediction. In terms of rough set and random forest advantages, a concrete dam deformation prediction model based on RS-RF was established. The application of engineering examples shows that the deformation monitoring model of concrete dams based on RS-RF can reduce the influence factor set, give the importance of each factor, and do well than commonly used models based on SVM and RF in prediction accuracy. Therefore, the deformation prediction model of concrete dam based on RS-RF achieves optimization of influence factors, which makes up for the shortcomings of intelligent prediction model in quantitative analysis and prediction generalization, and has strong engineering practicability.
Selection of treatment methods for soft foundation of river in a reclamation area
Authors: Lu Shanshan , Shi Xin
Published: May 2020

Several drainage channels are usually planned in the reclamation area in order to ensure the basic water surface ratio. It is necessary to conduct deep foundation treatment before the excavation of the river due to the high water content of hydraulic fill in reclamation area. Cement mixing pile method has been widely used in the treatment of river soft foundation as a method with mature construction technology, moderate overall cost and obvious treatment effect. Taking a river in a reclamation area as an example, it is recommended to adopt the cement mixing pile method to treat the soft foundation of the river after comparing the vacuum preloading method and cement mixing pile method.
Optimization Strategy of Landscape Ecological Planning in Urban Green Space System
Authors: Zhu Guang , Huang Linyan , Zhang Zihan
Published: May 2020

In recent years, China’s urbanization process has increased year by year, and the environmental problems brought by it have become increasingly prominent. The urban ecological environment and urban green space are closely connected. The improvement and reconstruction of the ecological environment need to be realized through the urban green space system planning. Therefore, it is imperative to apply landscape ecology in the urban green space system planning. This paper first outlines the important role of urban green space systems in restoring ecological and environmental problems. Second, based on the research on the landscape ecological progress of urban green space systems at home and abroad, through in-depth investigation of some representative urban green space systems in China, the current domestic Problems existing in urban green space system planning. Finally, based on the principles of landscape ecology, an optimization strategy for landscape ecological planning in urban green space systems was proposed. The results show that the use of landscape ecology can rationally plan the landscape space, green space corridors, green space patches and other factors in the green space system, thereby achieving the purpose of improving the urban environment and promoting ecological balance.
Adaptive Thermal Comfort Model in Naturally Ventilated Buildings
Authors: Liu Jing , Cai Ting
Published: May 2020

An investigation was carried out in naturally ventilated buildings in Zunyi, China, which was located in HSCW climate zone, covering the period of wintertime, from November, 2018 to January, 2019 and yielded 1177 datasets in total. Base on the gathered data, the adaptive thermal comfort model using Griffith’s method taking into account running mean outdoor temperature was developed. 55.9% of data points representing proposed comfort temperatures were not within comfort zones specified in ASHRAE 55 standard and CEN 15251. The proposed adaptive comfort model provides guides on building simulation with more accuracy and indoor thermal environment optimization in this area.
The Lateral Bearing Behavior of Single Pile Considering Scour Effect
Authors: Huo Shaolei , Dai Guoliang , He Hongnan , Gong Weiming
Published: May 2020

Three group model tests are designed to study the change law of lateral bearing behavior at different scour depths and the local scour is simulated by changing dimensions of scour hole. The favorable effect of remaining sand above the scour depth line is considered to get the calculation method of equivalent depth. Simulation was carried out using LPILE and the results were compared with those obtained from model tests. The results show that the equivalent scour depth formula derived based on the principle of invariable ultimate soil resistance is reliable, and the relative error between the LPILE calculated value and the test value is 13-17%, which indicates that the actual situation can be accurately predicted. The sensitivity of the scour depth, scour slope angle, and scour width parameters were analyzed to determine their effects on the scour hole and the validity of the theoretical equation; the results show that the impact of the three parameters decreased in turn, which can provide some reference for engineering design.
Analysis on construction of the subway shield underpassing the underground pedestrian passage at close range
Authors: Huo Wenxing , Xue Shifeng , Gao Zhiyu
Published: May 2020

Numerical simulation analysis was conducted on the shield tunneling construction of the right line between Tangdong station and Huangcun station of Guangzhou rail transit line 21, the right line subway shield underpassing the underground pedestrian passage at close range. The numerical simulation vertical settlement of the ground and floor outside the foundation pit was compared with the field monitoring. The results show that the numerical analysis of the trend of land subsidence is consistent with the field monitoring, the thickness of the tunnel roof overburden has a great influence on the ground settlement. The ground settlement is mainly subsidence with thick overburden, while the thin overburden, the ground settlement is mainly uplift; the Equivalent Circular Zone formed by simultaneous grouting and secondary grouting has a great influence on the ground settlement. During the site construction, the tunneling parameters should be adjusted according to the site monitoring, and parameters such as soil and water pressure on the tunneling surface, overburden thickness, synchronous grouting pressure and secondary grouting pressure should be taken into comprehensive consideration to control the tunneling of shield underpassing the existing structures at close range.
Application of BIM technology in fine design in steel structure bridges
Authors: Gu Pengyuan , Tao Feiyu , Wang Gang
Published: May 2020

This paper elaborates the necessity of the fine application of BIM technology in steel bridge, and also describes the fine design of BIM technology in steel bridge node, oblique cable and anchor box node, bridge tower wall plate and rib plate node, steel box beam node, and introduces the application of the building concept in steel structure bridge without margin.
Research on Building Energy Consumption Based on BIM
Authors: Gao Xiong , Wu Yansheng , Li Yan
Published: May 2020

In recent years, the issue of energy consumption in the building sector has been studied. The application of BIM has increasingly in ACE (Architecture, Engineering, and Construction) industry. Based on the characteristics of BIM, the paper studies the benefit of building energy consumption analysis. BIM information can be imported and convted in energy consumption simulation software. The BIM technology provide different data interface, which could dock with a variety of energy analysis software. BIM can be transformed into building energy model. Based on the analysis of BIM information importing process and parameter setting function of energy consumption simulation process in BIM-based energy consumption simulation software, the BIM model imports the energy consumption simulation software for building energy consumption simulation analysis, it is concluded that the specific problems of the energy saving design. The paper put forward that combined BIM technology with energy analysis during building design, which will help implement green building sustainable design.
The effects of Air-vents’ Layouts on Behaviour and Pollution of Dust in Tunnle Construction Environment
Authors: Wei Cunhou , Wen Nie , Liu Qiang
Published: May 2020

Study on powder behavior is the key to dust pollution prevention and control in tunnel construction environment, using wind energy to control dust diffusion is a common and effective dust control method at present. In this paper, the numerical simulation and field measurement were used to study the powder diffusion in construction of a tunnel boring machine (TBM)-based tunnel, in which the movement and diffusion properties of the powder in the tunnel were achieved and analyzed. By adjusting the height of the exhaust vent and the secondary blowing distance (LP), the quality of air in the tunnel was optimized. The accuracy of the simulation results was also verified by the field measurements. The results showed that when the height of the dusty return airflow (HW) is close to that of the exhaust vent (HE), the rock-dust concentration in the tunnel could be reduced to a certain extent. When LP < 50 m, the primary and secondary blowing airflows could form a coupled wind field in the middle of the tunnel to limit the further backward diffusion of the rock-dust. When LP > 50 m, the dust-control air-curtain could be formed within 18.83 m away from the heading. When LP = 60 m, the rock-dust in the tunnel was effectively controlled, and the diffusion distance of the rock-dust was less than 16.4m as well.
Research on the culture hall construction and management innovation from the public culture perspective
Authors: Liping Liao
Published: May 2020

With the rapid development of social market economy, the construction of new rural areas continues to advance, China’s rural material conditions have undergone great changes, but the spiritual and culture life is increasingly scarce. The focus of promoting harmonious social development to construct the public culture is important, improving public culture facilities, and realizing the win-win situation of material life and spiritual and culture life. Based on the analysis of the current situation and existing problems of culture hall construction in jiangxi province, combining with the construction process and proceduring of traditional culture hall construction, this paper puts forward the following suggestions from the public culture perspective: full research, reasonable plan and benefit orientation; respect history, integrate resources and supply effectiveness; Innovation mechanism, training talents, ensuring the capital countermeasures.
Study on the influence of organic polymers on the physical and mechanical properties of cement-based materials
Authors: Tian Yilang , Gao Peiwei , Wang Rong , Wang Limin , Zhong Jianjun , Li Jingsong
Published: May 2020

Four kinds of organic polymer emulsions of silicone acrylic, styrene-acrylic, waterborne epoxy and acrylic acid were selected and mixed into cement paste according to different poly-ash ratio, and experimental studies on their physical properties (fluidity and water-absorption rate) and mechanical properties (compressive strength, bending strength and bend-press ratio) were carried out. The results show that in terms of physical properties, only the waterborne epoxy emulsion improves the fluidity of the material, the four organic polymer emulsions reduce the water-absorption rate of the material, and the water-absorption rate of waterborne epoxy emulsion and styrene-acrylic emulsion decreases respectively by 61.8% and 51.5% at a poly-ash ratio of 0.15. In terms of mechanical properties, the four organic polymer emulsions fail to improve the compressive strength of the material, but the toughness of the material is improved. The waterborne epoxy emulsion has a 16.7% improvement in the bending strength at a poly-ash ratio of 0.2, and the styrene-acrylic emulsion has a 9.7% improvement in the bending strength at a poly-ash ratio of 0.15.
Analysis of the impact of rock hardness on the seismic response characteristics of CAP1400 nuclear island structure
Authors: Li Furong , Long Hui , Chen Guoxing
Published: May 2020

With the rapid development of the nuclear power industry, appropriate sites for nuclear power plants have become a scarce resource. The construction of a nuclear power plant is subject to stringent requirements of site selection, and it is necessary to ensure that the plant will have sufficient seismic resistance. In this study, targeting the CAP1400 nuclear island structure as the research object, a three-dimensional finite element model of the dynamic interaction between the nuclear island structure and the foundation is established by considering the nonlinear characteristics of rocks using ABAQUS software. Our objective is to analyse the impact of rock hardness on the acceleration, displacement and floor response spectrum of the nuclear island structure caused by earthquake based on a total of 4 types of rock foundations with different degrees of hardness. The results show that, with the increase of rock hardness, the acceleration of the nuclear island structure increases, the displacement decreases, while the peak of floor response spectrum increases and moves towards the short period (high frequency band) direction. The seismic response of the nuclear island structure increases with the increase of elevation, and the greatest level of response is observed at the cooling water tank of the shield building, which therefore should be targeted as the key for seismic design. For rock foundations with high hardness, the seismic design for the nuclear island structure can follow the standard for rigid foundations so as to ignore the effect of the soil-structure dynamic interaction.
Review of Filter and Its Performance Testing in Agricultural Efficient Water-saving Drip Irrigation System
Authors: Feng Ji , Xue Song , Liu Haisheng
Published: May 2020

Developing efficient water-saving irrigation technology is one of the important ways to solve the problem of water shortage in China. Rational allocation of drip irrigation filtration system is an important way to slow down the blockage of each component of drip irrigation system (such as emitters, solenoid valve, etc.). At present, many domestic and foreign manufacturers have produced many kinds of filter products, and many experts and scholars have done a lot of research on the hydraulic performance and filtration ability of the filter, but there is no comprehensive report on the filter features and its performances. Based on this, this paper comprehensively expounded the structure, performance characteristics, working principle and research progress of different types of filter, and the trends of filter research and product development were put forward in order to provide theoretical support for the wider application of drip irrigation technology and the construction of new countryside.