bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulation environment design for the investigation of damping and dewing mechanisms in the 12kV high-voltage switchgear
Authors: Pan Qize , Yang Fang , Tang Xiaoliang , Yang Zhi , Liu Shulin
Published: September 2018

The phenomenon of dampness and dewing inside the switchgear can improve the occurrence of serious equipment faults. Based on it, this paper, starting from the occurrence mechanism of dampness and dewing of the switchgear, summarizes the main techniques that can prevent and control them, and the merits and demerits of them are analysed. After that, based on the mechanism investigation of damping and dewing of 12kV switchgear, a simulation environment is designed in order to investigate the mechanism of damping and dewing the 12kV switchgear. Firstly, the entire simulation environment factors are given. Then, the prototype of this switchgear is designed, including base configuration and sensor installation configuration. In addition, the simulation environment of the distribution room, the switchgear with load operating conditions, several commonly used anti-dampness and anti-dewing methods of 12kV switchgear, and the rotary dehumidifier are designed. Lastly, prospects are given. This paper can provide some references for studying of damp-proofing and anti-dewing of 12kV switchgears.
The Application of Simple Controlled Pressure Drilling Technology in Yingxi Block
Authors: Guohui ZHANG , Hugui  , rong CHEN , Xinyun LIU , Xiwen ZHANG
Published: September 2018

Under the reservoir for exploration and development of Yingxi block in Qinghai oilfield, the chaigou formation is oil and gas reservoir complicated by the fault, and the exploration has been carried out over the years. The reservoir is a fracture - matrix pore dual medium type, with strong heterogeneity, fracture development degree, porosity and permeability variation range. The reservoir is very sensitive to wellbore pressure, the safety drilling density window is narrow, the conventional drilling leakage is frequent, the reservoir protection effect is poor, and the mechanical drilling rate is low. In 2016 six wells were selected for easy control and pressure drilling in the lower E23 formation. The technology experiment has obtained good application effect, which provides successful experience to solve the complex and improve the engineering quality and benefit.
Regional Short-term Micro-climate Air Temperature Prediction with CBPNN
Authors: Huang Lvwen , Chen Lianliang , Wang Qin , Yan Siwen , Gao Xunbing , Luan Jiangjiang
Published: September 2018

This paper proposes a novel short-term air temperature prediction with three-layer Back Propagation Neural Network (BPNN) for the regional application of next 1-12 hours. With the continuous collection of eight real-time micro-climate parameters in the experimentation and demonstration stations in our university, the Multiple Stepwise Regression (MSR) is employed to screen the original historical data to find the parameter factors with greater contribution rate. On the basis of the Root Mean Square Error (RMSE) value evaluating the optimal fitting degree of the stepwise regression, the Levenberg-Marquardt (LM) and the Resilient Propagation (R-Prop) training algorithm are employed to construct a Combined BPNN (CBPNN) with two MSR inputs. Compared with the known micro-climate data sets, the Mean Absolute Error (MAE) is to evaluate the applicability of CBPNN prediction model. The experimentation shows that the MAE is within 4°C in the next 12 hours. This proposal will be deployed in stations in our university for extreme weather warnings, and could be applied to some regional short-term parameter prediction for the future agricultural production service.
Observation of a Severe Wind Case Caused by Gust Front and Its Boundary Layer Structures Characteristics
Authors: Xu Changyi , Wang Yan
Published: September 2018

Based on Doppler radar 3D-composited reflectivity, wind profiler radar, boundary layer Tianjin tower of 255m as well as intensified automatic surface observation data, the evolution of the boundary layer associated with two successive gust front processes in the evening of 10 June 2016 and the intensity of the related disastrous surface high wind were analyzed. The results shown as follows: (1) To the same storm cell, the wind intensity caused by the outflow boundary in the main body was stronger than the wind caused by the gust front. The intensity of the disastrous high wind was related to the maximum descending velocity in the boundary layer and the associated height. The stronger the maximum descending velocity and the lower the level, the stronger the disastrous high wind was. (2) The tower data indicated, as the approaching of the gust front, convergence fluctuations first emerged at low(20m) and middle(120m) levels of the tower, leading the emergence of disastrous high wind by 8 minutes. When the gust front passed over, the maximum variations of cooling and the wind velocity were in pace with each other.
Analysis of Carbon Flux in Terrestrial Ecosystems from GOSAT Data in China
Authors: Zhang Lanlan , Zhang Jinye , Lv Hui , Sun Bangwu
Published: September 2018

In recent years, the evaluation of carbon sources and carbon sinks has become one of the major research topics. The temporal and spatial distribution of carbon flux and some factors that affect carbon flux were analyzed in this paper based on the Net Ecosystem Exchange (NEE) data, which were provided by Greenhouse Gases Observing Satellite (GOSAT) project and FLUXNET project. Then, we found that carbon flux had obvious seasonal variation. It was carbon sink in summer and carbon source in winter. The total amount of carbon flux in July or August was about -1.377 ~ -1.882 gcm-2day-1, and 0.64 gcm-2day-1 in November. The fluctuation of carbon flux in coastal area was stronger than that in inland. Forest areas had stronger carbon storage capacity than that in other vegetation areas, and the flux in forest areas had the largest change. The vegetation coverage was larger, and the carbon storage capacity was stronger.
Evaluation of Tourism Eco-efficiency in Yangshuo County from the Perspective of Carbon Footprint
Authors: Han Xiaoying , Wang Jinye , Li Ning
Published: September 2018

According to the input-output theory, the paper quantitatively analyzes the tourism ecoefficiency of Yangshuo in 2017 by building a tourism eco-efficiency model based on carbon footprint. The research shows that: Firstly, the total carbon footprint of tourism traffic in 2017 is 791.22×106 kg; the total carbon footprint of tourism accommodation is 353.60×106 kg; the total carbon footprint of tourism activities is 123.29×106 kg. Secondly, the 2017 tourism eco-efficiency of the Yangshuo County is 8.05 RMB per kilogram. It refers to the economic profit is 8.05 RMB when 1 kilogram of carbon dioxide is produced, which is relatively efficient compared with other regions. Lastly, the paper makes suggestions with regarding to the optimization of the tourism eco-efficiency.
The Reconstruction of Guilin's Urban Ecological Landscape Based on the Concept of Sponge City
Authors: Li Xinling , Wang Jinye , Li Ning
Published: September 2018

Guilin is an international tourist city famous for its landscape, but the prominent contradiction in water usage becomes one of the key factors that influences and restricts the construction and development of the city. As an effective measure to relieve the contradiction of urban water usage, the concept of “sponge city” has achieved success in many places. Thus, building Guilin urban ecological landscape on the basis of the concept of “sponge city” is of great significance for the effective relief of the contradiction in water usage and the realization of sustainable development. Academic studies point out that for the purpose of the construction of sponge city, the construction of Guilin's urban ecological landscape first need to adopt sponge strategies in urban residential areas, transform or build a virtuous circulating green space system to collect, purify and store rainwater in an effective way. Secondly, build rainwater collection, purification, storage facilities or systems extensively and replenish urban ecological water reserve in the grey system of the city, according to the concept of “sponge”. Thirdly, considering the large area of Guilin city parks, build rainwater self-use rain systems extensively in city parks based on the concept of sponge and substantially reduce external ecological water reserve. Fourthly, reinforce training and learning related to the concept of “sponge city” and the implementation of “sponge city” policies.
Studies on Regional Green Development Based on Social Network Analysis
Authors: Huang Yuan , Wang Zongling , Zeng Yi
Published: September 2018

Under the guidance of five development concepts, we should grasp regional overall economic, innovation, and traffic associated structure macroscopically, and analyze cities' status and role within the region when planning the regional green design. Through systematically considering regional overall structure, relationship between subjects and individual differences without prejudice to the ecological environment, it can play the greatest role of traffic led, city led, and market led, which can achieve regional green development. We build the traffic interaction network model, economic correlation network model, and innovation-driven network model to analyze network structures, identify key nodes and provide methodological guidance for regional green development plan. We bring Beijing-Tianjin-Hebei Urban Agglomeration for the case study and draw the following conclusions. The traffic interaction network is closer than the economic correlation network and the innovation-driven network, and the economic correlation network is closer than the innovation-driven network. The three networks all have a high degree of centralization, which means there is a great difference among cities. Beijing, Tianjin, Shijiazhuang develop relatively well, however, Chengde, Hengshui and Zhangjiakou relatively fall behind. Dezhou has a foundation to promote transportation integration and lacks the economic momentum and innovation driven. Chengde should increase the degree of innovation and communication to build connection with other cities.
Sedimentary Characteristics and Lithological Trap Identification of Distant Braided Delta Deposits: A Case on Upper Cretaceous Yogou Formation of Termit Basin, Niger
Authors: Ning Zhao , Xia Gao , Jiangqin Huang , Zhongmin Chen , Guangya Zhang
Published: September 2018

Lithological trap identification in thin sand and thick shale layers is still a challenge for hydrocarbon exploration. Based on the high-resolution sequence stratigraphy theory and the establishment of high-resolution sequence stratigraphy framework with seismic-well tie, the dynamic deposition process of braided delta sands on late Cretaceous Yogou formation has been analyzed on 62 wells in passive rifting Termit basin with multi-stages depressions and reversals. (1) Six kinds of sedimentary microfacies and three major reservoir sands with multi-stages vertical stacking and lateral migration are in late Cretaceous; (2) Based on accommodation space/Sediments supply change and depositional progress, sedimentary facies distribution evolution has been done according to sands thickness statistics of sedimentary micro-facies, and narrow-time seismic attributes and slices analysis, multi-sources braided delta depositional model has been concluded; (3) Based on source rock and caprock evaluation, with reservoir sands distribution and faults impact on Yogou formation of Termit basin, four types of traps, including structure-lithology, Structure-strata, stratigraphic and lithology are concluded. Traps influencing factors, i.e., structure geometry, sands distribution, paleotopography, stratigraphy cycling, sand/shale lateral connection, reservoir quality and so on, have different impacts on these traps, and different lithologic-stratigraphy traps have different exploration risks. Structure geometry and sands distribution are very important for the structure-lithology traps; structure geometry and paleotopography are the key factors in Structure-strata traps. Sands distribution and reservoir quality can be focused on lithology traps. Moreover, paleotopography and sand/shale lateral connection are significant on stratigraphic traps. Therefore, different hydrocarbon accumulation types of lithological traps have been established.
Research on user demand response under time-of-use tariff policy based on Sigmoid function
Authors: He Yongxiu , Chen Fenkai , Jiao Zhe , Guang Fengtao , Gao Xiao , He Qing
Published: September 2018

The change of user load characteristic is affected by many factors, among which power policy factors have a greater impact on user load characteristic. Based on the Sigmoid function, this paper constructs a response characteristic model of users to time-of-use tariff policy, then analyzes the changes of indicators of load characteristic before and after the implementation of the time-of-use tariff policy based on the summer typical daily load characteristic curve of users in a certain area. The analysis shows that the implementation of the time-of-use tariff policy is conducive to reducing difference between peak and valley, as well as increasing the load rate.
Numerical Simulation of Surrounding Rock Stress under Different Overlying Strata Combinations in Sijiazhuang Mine
Authors: He Jun
Published: September 2018

Sijiazhuang coal mine is taken as an example in this paper. Both the theoretic model and the numerical simulation are carried out to analyze the stress distribution regularity on the surrounding rock of stope face under different overlying strata combinations by using discrete element method. Under different combinations of the overlying strata, the results indicate that the regularity of stress distribution around stope face is roughly the same, i.e. the stress concentration of different degree appears in both ends, and the region of pressure relief exist above the stope face. Furthermore, destruction degree of the roof in stope face is different under various overlying strata combinations. On the eve of the first weighting, the different combinations present different phenomenon of concentration, especially the soft-hard-soft combination and hard-soft-hard combination.
Analysis of Calculation Errors for Single-zone and Multi-Zone Natural Ventilation model in Residential Building
Authors: Xuan Zheqi , Zheng Xiaohong , Shi Zhenni
Published: September 2018

The typical residential building in Changzhou City, Jiangsu Province was selected for natural ventilation measurement during the transitional season, the plum rainy season, summer and winter. In this paper, SF6 is used as the tracer gas, and tracer gas decay method was selected to obtain the air change rate in the room under each measuring condition. EnergyPlus(EP) was used to calculate the single-zone and multizone air change rate which can be compared with the measured values respectively. It was found that the calculated values of single-zone model were generally small and the errors were large. And the calculated values of multi-zone model have a significant reduction in error after considering the equivalent infiltration area. In addition, the effective infiltration area will be different due to the existence of the thermal expansion coefficient for different seasons.
Experimental Study on the Failure Characteristics of Strata With Different Filling Rates in Long-wall Filling Mining
Authors: Lin-gang JIA
Published: September 2018

In order to study the mechanical characteristics including deformation, displacement and stress distribution of surrounding rock during the process of filling mining with different filling rate, according to the geological and mining conditions of the 12307 working face in some coal mine, the analyses of simulation were synthetically applied. The results show that the deformation and failure of overburden rock is closely related to the filling rate, when the filling rate is low, the fractures are extensive, longitudinal and transverse fractures are staggered, the vertical displacement of rock strata is differentiated obviously,while filling rate is high, the fractures appeared only in low strata, the rock strata displacement main occurs near the immediate roof, the strata displacement curves in the stable subsidence area are almost together, the rock presents the overall bending deformation, from the roof to the surface layers are whole movement characteristics. There is a power function between the influence distance and the filling rate, the concentrated stress decreases linearly with the increase of filling rate.The filling rate is an important factor to control the strata movement and surface deformation, the results of the study are of great significance to guide practice in filling mining.
Design And Analysis Of Water Supply And Drainage Engineering For A Residential Building
Authors: Ye Suxian , Li Jingwen , Yuan Jiao , Hu Yao , Han Xiaoqiang
Published: September 2018

Nowadays, the demand for architecture by the public is not only a living, but also an increase in comfort and safety requirements, and more attention is paid to the design of water supply and drainage works for buildings.In recent years, the rapid development of the economy, whether it is urban or township, the degree of housing community is getting higher and higher, people's requirements for the water supply and drainage function of the building are also constantly improving, which gives the water supply and drainage project a broader development space.In this paper, the nine-story building in a certain district is taken as the research object, and the design analysis is carried out according to the relevant data of the building and the living needs of the residents to verify the feasibility.According to the four parts of water supply, drainage, fire protection and rainwater drainage, the water supply and drainage project of the building is analyzed, and the construction points are briefly given.It can effectively improve the design level and quality of the water supply and drainage system of the building, and facilitate the use of domestic water for residents.
The Urban Heat Island Analysis of Changsha-zhuzhou-xiangtan Urban Agglomeration Aased on Modis Data
Authors: Yuan Jiao , Li Jingwen , Ye Suxian , Han Xiaoqiang , Hu Yao
Published: September 2018

Using a spatial resolution of MODIS land 1000m standard products, we can get the Land Surface Temperature.Researching for the Land Surface Temperature including spatial and temporal distribution characteristics influence factors.The results show that Spring,Summer and Autumn temperatures mainly concentrated in the central region,Winter temperature mainly concentrated in the South region.From 2001 to 2015,the maximum temperature difference is summer daytime and the difference is 17.58°C,the minimum temperature difference is autumn daytime and the difference is 11.3°C.According to the thermal field intensity distribution,compared 2005 with 2015,Urban Heat Island intensity gradually increased in 2015,the high temperature area increased and distributed more concentrated,and diffusion weakened from the city to the surrounding,the urban heat field is higher than the thermal field.That index by calculating the thermal landscape,account for a dominant position in the middle of heat distribution,and all types index in 2015 are higher than in 2005.
Tourism Information Push System Based on Convolutional Neural Network
Authors: Han Xiaoqiang , Li Jingwen , Hu Yao , Yuan Jiao , Ye Suxian
Published: September 2018

In the context of the current hot tourism, personalized travel information push is the focus of major travel technology companies. For tourists, an intelligent and humane tourism push system has greatly improved tourism planning. this paper proposes a new tourism push system based on the deep learning technology of the recent hot convolutional neural network. It can satisfy the big data era by acquiring the user's image and text information for convolutional neural network analysis. The intelligent extraction of various network data and personal information and speculation of personal preferences, with a new way of self-learning to reform the current active statistics of the travel push system. The results show that the tourism information pushed by this method is ideal for satisfying the travel preferences of individual users, more humanized and intelligent, and has achieved good results.
Study on nitrogen removal performance and microbial community structure succession under the condition of anaerobic sludge and low carbon source
Authors: Wang Jiabin , Li Tianhang , Xie Kang , Yu Cong , Wang Xiaoyu , Wang Zeya
Published: September 2018

Under anaerobic low carbon source, the reactor was started-up by inoculating anaerobic sludge. The nitrogen removal efficiency and nitrogen conversion pathway during the start-up process were analyzed. At the same time, the structure succession of bacteria in the process of start-up was analyzed by PCR-DGGE technology from molecular biology level. The results showed that inoculated anaerobic sludge had a good effect on nitrogen removal under the condition of anaerobic low carbon source.
Study on Key Factors of Adsorption of Phosphorus by Steel Slag Filter Based on Response Surface Method
Authors: Wang Jiabin , Wang Xiaoyu , Qiu Liping , Li Tianhang , Yu Cong
Published: September 2018

Excessive phosphorus emission is one of the important reasons for the eutrophication of water. At the same time, phosphorus is a significant mineral resource. In this paper, the response surface method is used to study the key influencing factors of phosphorus removal by steel slag filter and its action. Four factors affecting the dosage, initial pH, reaction time and calcium-phosphorus molar ratio were selected. The phosphorus removal was used as the response value. The interaction between various factors was established by Box-Behnken response surface analysis. The optimal conditions were determined by equation regression analysis: dosage = 2 cm3; initial pH = 7; molar ratio of calcium to phosphorus was 2:1; reaction time = 2 h.
Study on Rapid Start-up of Anammox Process under the Influence of Magnetic Field
Authors: Wang Jiabin , Yu Cong , Zhang Shoubin , Li Tianhang , Zhang Dong , Wang Xiaoyu
Published: September 2018

In order to study the rapid start-up technology of the anaerobic ammonium oxidation process, a comparison test of no magnetic field and magnetic field was performed in two identical ASBR reactors R1 and R2 respectively. The results show that both reactors can successfully start Anammox. The R2 start-up period (75d) of the applied magnetic field is shortened by 15% compared with the unloaded magnetic field R1 start-up period (90d); the R2 ammonia-nitrogen removal rate is 97% higher than that of 95% of R1. The quantitative relationship analysis between NH4+-N, NO2--N and NO3--N shows that the change of R2 ratio is closer to the theoretical value, which can better improve the activity of microbial enzymes and accelerate the enrichment of ammonia oxidizing bacteria in the reactor. It is beneficial to nitrogen removal and R2 can quickly start the anaerobic ammonium oxidation process.
Determination and Analysis of Leaf P and K Concentrations of Several Plant Species in Jinan City
Authors: Liu Ye , Wang Xinyu , Luo Fang , Wu Liuqing , Zhang Yating , Lan Tianjun
Published: September 2018

The effect of phosphorus(P) and potassium(K) on plant growth and development was irreplaceable. Based on random sampling of several plant species in the west campus of University of Jinan, the concentration of leaf P and K were measured by the total nitrogen total phosphorus total potassium analyzer. The results showed that Armeniaca vulgaris Lam. has the highest concentration of P and K, reaching 395.08 mg/kg and 227.45 mg/kg, followed by locust Robinia pseudoacacia Linn.. Ailanthus altissima (Mill.) Swingle and Ligustrum quihoui Carr. has the lowest concentration of leaf P. The leaf P concentration of all plant species was higher than leaf K concentration except for skunk. Based on the soil nutrients status of study area, it was found that Armeniaca vulgaris Lam.and Robinia pseudoacacia Linn. could be appropriately expanded in the end.
Spatial-Temporal variations of vegetation and the relationship with precipitation in summer-A case study in the hilly area of central Sichuan province
Authors: Luo Xinrui , Yang Wunian , Liu Liang , Zhang Yuhang
Published: September 2018

The hilly area of central Sichuan is one of the ecologically fragile regions in the upper reaches of the Yangtze River, and it is also the main part of ecological engineering construction. The ecological environment in the study area is related to the ecological security in the middle and lower reaches of the Yangtze River. Recent years have witnessed a great change in vegetation cover in this area as a result of climate change. Therefore, it is necessary to identify the changing patterns of vegetation cover and the impacts of climate change on the vegetation cover change in the study area. In this paper, the characteristics of vegetation cover change over the past 15 years were analyzed, based on the dataset of MODIS NDVI from 2001 to 2015 as well as the climate data from 55 meteorological stations, with methods such as maximum value composite (MVC), linear regression and correlation coefficient. The results showed that the annual maximum average NDVI in the hilly areas of central Sichuan has increased at a rate of 5.84/10a (P<0.01), while the summer average NDVI has increased at a rate of 1.6/10a (P>0.1). The spatial distribution of annual NDVI significantly increased (31.58%) was greater than the significantly decreasing trend (2.90%). Besides, areas with significantly positive correlation and significantly negative correlation between NDVI and precipitation in summer accounted for 16.91% and 2.5% of the total area, respectively. And, the correlation between NDVI and precipitation in summer was different in different regions.
Study On The Law Of Ground Strata Subsidence And Movement Induced By Caving Mining Of Slowly Inclined Large And Thick Ore Body
Authors: Teng Li , Jianxin Fu , Weidong Song
Published: September 2018

Taking the Western District of Chengchao Iron Mine as engineering background, based on the GPS monitoring data of nearly 8 years and the record of the ground surface movement, the law of ground strata subsidence and movement is studied. The studies have shown that the surface movement caused by underground mining has the characteristics of time delay and displacement angle development has the law of jumping. The strata movement caused by mining is divided into the stage of overlying strata collapse and the collapse stage of surrounding rock to goaf. In the first stage, the vertical stress plays a leading role and rock failure is shown as a regular barrel collapse. In the second stage, horizontal tectonic stress plays a leading role and the collapse mechanism of rock strata can be explained by the cantilever beam theory. According to the mechanism of strata movement analysis, strata movement of Chengchao Iron is divided into six regions, which respectively included vertical subsidence area, toppling sliding zone, dumping area, deformation zone, cumulative deformation area and undisturbed zone. The results of this paper can provide a theoretical basis for the surface movement prediction of caving mining in similar metal mine.
Spatial Assessment of Heat Exposure in Bay Cities: A Case of Xiamen in China
Authors: Yang Haifeng , Wang Ya'nan , Shui Wei
Published: September 2018

With the global warming, the rapid urbanization process and the increasing intensity and scope of human activities, extreme high temperature and cooresponding high temperature events were frequent, meanwhile, the degree of urban exposure to high temperatures was growing. The research constructed the heat exposure evaluation index system by taking the heat exposure evaluation index system in Xiamen, a gulf-based city with high-temperature. This study evaluated the influence factors, spatial differentiation features and hotspots of the heat exposure based on the methods of geo-spatial analysis, emergy accounting theory, expert consultation and analytic hierarchy process in Xiamen. The research results were expected to promote the theoretical development of urban heat exposure researches, and to provide decision-making reference for heat exposure assessment, regulation and adaptation in Xiamen and similar high temperature cities.
Study on the Acoustic Characteristics of Rocks and Fracability in Wunan Oilfield
Authors: Ziyi Guo , Yongquan Hu , Yong Zhang , Tingsong Xiong , Chun Mao , Hai Lin , Youyu Wan , Shiduo Liu
Published: September 2018

The acoustic characteristics under P&S wave velocity of 56 samples from Low Youshashan Formation in Wunan Oilfield were tested by SCMS-E high temperature and high pressure core multi parameter test instrument, the measured velocity ratio of P wave and S wave is 1.32-1.67 and the conversion between the P and S wave velocity of rock sample was established. The corresponding dynamic elastic modulus and Poisson's ratio were obtained on the base of the elastic wave propagation theory formula. So, according to the transformation relationship between static and dynamic mechanical parameters, rock brittleness index is calculated and average value is only equal to 38. Therefore, it is difficult to form a fully developed network model during the hydraulic fracturing. These achievements provide a guiding significance for fracturing development at Low Youshashan Formation in Wunan Oilfield.
The spatial-temporal differences in coupling relationship between urbanization and eco-environment-a case study of the urban agglomeration in the middle reaches of the Yangtze River
Authors: Chen Yue , Yu Yan , Han Qianwen , Tong Yan , Ke Yuanyuan
Published: September 2018

Exploring the coupling coordinated relationship between urbanization and eco-environment of the urban agglomeration in the middle reaches of the Yangtze River (UAMRYR) from 2000 to 2015 can provide a theoretical basis for the overall planning and healthy development of the region. Therefore, in this article, we took 31 cities of the UAMRYR as the research area, and established an evaluation system to calculate the urbanization level and eco-environmental quality. Then, using entropy method and coupling measurement model, we analyzed the coupling coordination relationship between urbanization level and eco-environmental quality from spatial and temporal perspectives. Temporally, the coupling degree (CD) and coupling coordinated degree (CCD) continually rose during the 16 years. Spatially, the coordinated development level of urbanization level and eco-environmental quality had significant spatial differences. The CD presented the “northwest-southeast” spatial characteristics corresponding to high-low distribution. The CCD showed an inverted Y-shaped spatial pattern that gradually decreases outward from the provincial capital city. The coordinated development level of urbanization and eco-environment in the UAMRYR showed a central-periphery spatial pattern, and had an obvious spatial variation.
The Spatial-Temporal Characteristics of Urban Construction Land Expansion in Wuhan, Central China
Authors: Han Qianwen , Yu Yan , Hu Shanshan , Chen Yue , Ke Yuanyuan , Tong Yan
Published: September 2018

Data of construction land in Wuhan city were obtained from remote sensing image in different periods. Based on the spatial analysis function of GIS, the characteristics of construction land expansion were identified by several methods to analyse the spatial-temporal features of Wuhan city area from 1995 to 2015, which included expansion speed, expansion elasticity, contribution rate of expansion, centre-ofgravity shift, and quadrant orientation. The results showed that the construction land area increased gradually from 1995 to 2015 in Wuhan city, and the expansion speed first increased and then decreased. The direction of construction land expansion in Wuhan city was expanded to the southwest significantly. The construction land expansion can’t meet the needs of population growth. Jiangxia district contributed most to the expansion of Wuhan city.
Practical study on Japanese building construction management by avoiding risk to environment and safety
Authors: Wariishi Hiroyuki , Tanaka Takehiro
Published: September 2018

It is essential in building construction management to prevent risk from the viewpoint of both environment and safety. This study suggests the significance of building construction management which places emphasis on risk prevention for the sake of environment and safety, with the introduction of Japanese efficient operation methods to simultaneously conduct environmental management, safety management and risk management, in addition to practical measures for heatstroke which is a serious summer issue of building construction management.
Sensitivity Analysis of Influencing Factors of Building Slope Stability Based on Orthogonal Design and Finite Element Calculation
Authors: Jin-kui RUAN , Wei-wei ZHU
Published: September 2018

In order to study the sensitivity of factors affecting the homogeneous building slope stability, the orthogonal test design method and shear strength reduction finite element method were used. The stability safety factor of the slope was used as the analysis index, and the range analysis of results of 18 cases were carried out. The results show that the order of sensitivity of slope stability factors is: internal friction angle, slope height, cohesion, slope angle, bulk density, elastic modulus, Poisson's ratio. The analysis results have reference significance for the design and construction of building slope projects.
Ambient Vibration Test of a 18-Story Reinforced Concrete Building
Authors: Ma Jun , Ge Jie
Published: September 2018

Ambient vibration analysis of a 18-story reinforced concrete building was carried out to investigate its dynamic properties. Ambient vibration test was conducted on the building, and modal parameters including natural frequencies and damping ratios were identified using the Frequency domain decomposition (FDD) method and the Enhanced frequency domain decomposition (EFDD) method. The results demonstrate that ambient vibration test is a feasible and efficient technique to excite structures, and that FDD and EFDD methods are reliable and efficient techniques for ambient vibration data.
Engineering Application and In-situ Monitoring Analysis of Retaining Structures of New H-section Steel Support System in Foundation Pit
Authors: Han Lei , Sun Min , Wang Hao , Wang Guo-xin
Published: September 2018

A new H-section steel support system is introduced based on a foundation pit project in Shanghai. In-situ monitoring was carried out to measure the displacement of supporting piles. The monitoring results showed that the displacement of pile-top was closely related to the excavation depth and time. It is basically no longer developing after the foundation slab concreted finished. Horizontal displacement of the pile body increased gradually with the increase of excavation depth. The maximum horizontal displacement was about 25 mm and the position was about 1 m below the bottom of the foundation pit. Finally, the horizontal displacement of the pile body was presented as a "bow" with a small displacement at two ends and a large displacement in the middle. Compared with those at reinforced concrete support area, it showed that the deformation law and final displacement value of pile-top and pile body in the new H-section steel support area was basically the same as that of reinforced concrete support area. And all of the monitoring data were within the security range, meeting the design and code requirements. Moreover, new H-section steel support system construction period was short and the cost was low. It could effectively improve the green construction level. The conclusions obtained in this paper could be referred for other familiar projects.
A Three-dimensional Competition Evaluation Approach on Environmental Technology in China
Authors: Yuan Like
Published: September 2018

Since 2000, a relatively complete system for environmental science and technology has been established. However, there are no clear quantitative results on the exact level of China’s current environmental technology. This research has established a three-dimension technological evaluation model consisting of longitudinal technological gap judgment, horizontal technological level comparison and indepth technological development stage analysis. The results show that China’s environmental technologies have formed the basic pattern of leading, parallel and tracking. Nearly half of China’s technologies are in the pilot trial stage, while the technological leading countries are mainly concentrated in the industrialization stage. It’s not easy to support the construction of national ecological civilization.
Enhanced photodegradation of di(2-ethyl)hexyl phthalate by Molecularly Imprinted titanium dioxide
Authors: Shi Yu , Chen Fang-yan , He Li-na , Tang Yu-bin
Published: September 2018

To enhance the photocatalytic degradation efficiency and selectivity of di(2-ethyl)hexyl phthalate (DEHP), molecularly imprinted TiO2 (MIP-TiO2) was synthesized with di(2-ethylhexyl) phthalate as template molecule. The as-prepared MIP-TiO2 was characterized by Field emission scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier infrared spectroscopy (FI-IR), UV-Visible diffuse reflection spectroscopy (UV-Vis) and photoluminescence spectroscopy (PL). The selective adsorption and photocatalytic activity of MIP-TiO2 for DEHP were studied. The results show that DEHP molecularly imprinted polymer was coated on the surface of TiO2. The light-response of MIP-TiO2 was broadened. The photo-generated electron/hole recombination on the surface of TiO2 decreased. The selective recognition to DEHP was improved. Compared with TiO2, MIP-TiO2 exhibited higher photocatalytic activity and selectivity to DEHP. The photocatalytic degradation efficiency of DEHP (5mg/L) by MIP-TiO2 was 89%. The photocatalytic degradation rate of DEHP by MIP-TiO2 is 1.5 times that by TiO2. MIP-TiO2 could be reused.
Experimental Research on Removal of Turbidity and UV254 by Poly-aluminum Chloride (PAC)
Authors: Jia Ru-sheng
Published: September 2018

Through a static beaker test, it was analyzed the effect on the removal of turbidity and UV254 by poly-aluminum chloride(PAC) under different dosages and pH values in the PI river,and discussed the relationship between the dosage of PAC and residual aluminum.The results showed that it has good effect on removing turbidity by adding PAC,but it was normal to UV254,the removal rate was not exceed sixty percent, with the increase of PAC dosage, the removal trend of the turbidity after precipitation was similar to that of UV254, while residual aluminum first decreased and then slowly increased.For turbidity removal, the optimal dosage of PAC was 8.5 mg / L, and the optimal pH value range was 7.2-8.5. For removal of UV254, the optimal pH value range was 6.5-7.2. The best experimental conditions for coagulation are PAC dosage of 8.5 mg/L, raw water pH value of 7.2.
Regional Green Development and Spatial Evolution in China: Abiding by Theory of Dissipative Structure
Authors: Deng Fumin , Zhu Hui , Liang Xuedong
Published: September 2018

Regional green development can commendably abide by the theory of dissipative structure. The relative dissipative characteristics taken on by regional development are analyzed, in which the energy factors and resources factors are incorporated into the green economic development and green environment support subsystems (2GE system) in line with the definite input characteristics. A more representative indicator system is established, with positive and negative entropy indexes involved. As Brusselator model and information entropy method are employed to calculate the data of 30 China’s provinces from 2008 to 2015, the findings bespeak that green development in China lays particular stress on green economic development assuming higher environment pressure and cost. The development among various regions is getting progressively and evidently different, which is manifested as potent economic base and abundant natural resources in the Eastern China; the backward green economic development and the progress of green environment in Central China; the pursuit of green economic development at the expense of the green environment in Western China and Northeastern China.
Research on the technical requirements standard of the services of environmental protection facilities operating organization for assessment
Authors: Jin Huang , Xiaoxin Zhang , Bingsheng Xu , Ling Lin
Published: September 2018

The service ability and quality for the environmental protection facilities operating organization have the direct bearing on the achievements of ecological civilization construction and environmental quality improvement goals. This article discussed the significance of the research on the technical requirements national standards of the services of environmental protection facilities operating organization for assessment, expounded the classification and scope of the environmental protection facilities operating organization, as well as the assessment technical requirements, which included the assessment principle, basic requirements, the evaluation index requirements, test and calculation method, statistics and evaluation classification, etc. The development and implementation of the standard will contribute to the promoting of the operating level for the domestic environmental protection facilities.
Wind Driving Triboluminescence Technology: A Physical Agriculture Method of Pest Insects Control without Pesticides†
Authors: Qiang ZHOU , Jian-chao Wang , Zhi-shen Li
Published: September 2018

Some of triboluminescence materials have the property of shortwave light emission, which is possible to make them being used as the light resource of pest-insects phototaxis trapping. The inorganic composite phosphors Sr2MgSi2O7:Ce and organic composite phosphor Mn-PMBB are tested to have the violet-blue spectrum and green spectrum glowing respectively; Their vertical axis wind driving triboluminescence unit is designed and fabricated on the basis of squirrel cage structure friction pair with multi-glass bars against on the cylindrical phosphor. The persistant wind driving tribo-luminescence is obtained in the experiment of wind driving triboluminescence unit. Further the triboplasma of N2 and N2- Ar gases closed in the quartz tube is researched by means of PTFE elctret on quartz tube friction pair, and a high intensity triboplasma light emission with more than 50000 counts is obtained in the span of 310-420nm spectrum that supplies a more suitable shortwave spectrum of phototaxis trapping pest insects. The annular quartz glass tube is designed to constitute PTFE against on quartz friction pair; The triboplasma emission device is fabricated utilizing three stacking layer structure of PTFE-anuular quartz tube friction pairs, and the S-type vertical shaft wind tuebine is used to form the wind driving triboplasma emission unit. The violet-blue emission spectrum of N2-Ar gas troboplasma is obtained in the test of vertical wind driving triboplasma unit.
Recovery of Valuable Metals from Acoustic Magnet Swarf Slurry
Authors: Chen Wei-Sheng , Wang Li-Pang , Hung Chen-Yao
Published: September 2018

Acoustic magnet swarf slurry (AMSS) has 1900 tons production worldwide. The composition of AMSS contained 12.45% neodymium, 34.35% iron, 0.48% boron and 52.5% of cooling reagent. Removing cooling reagent and decreasing iron dissolution percent were achieved by oxidation roasting and selective leaching. Selective leaching removed 89% of iron with parameter of 0.5M HCl, solid-liquid ratio equal to 1:100, 4 hours at 95℃. The rest of iron was separated by solvent extraction with Aliquat 336 as extractant. The optimal parameters of extracting iron were 0.1M A336, 3M chloride ion, aqueous-organic ratio equal to 1:3 and mixed for 1 minute. Oxalic acid added to solution after solvent extraction to precipitate neodymium. The final product was neodymium oxidize with 99% of purity by calcined neodymium oxalate at 900℃ for 0.5 hour. The recovery percent of neodymium was 99%.
Research on Degradation Characteristics of Nonylphenol in Water by Highly Effective Complex Microorganisms
Authors: Ma Juan , Chen Fang-yan , Tang Yu-bin , Wang Xin-gang
Published: September 2018

Aiming at effectively controlling nonylphenol (NP) pollution, three bacterial strains were isolated from activated sludge and landfill leachate, which could grow with nonylphenol as sole carbon and energy source. The three nonylphenol-degrading bacteria isolated were named as WN6, SLY9 and SLY10, respectively. The morphological observation and 16S rDNA identification revealed that the strains belonged to Serratia sp., Klebsiella sp. and Pseudomonas putida, respectively. WN6 and SLY9 contained ALK gene, while WN6 and SLY10 harbored C12O genes. The three strains were combined together to form complex microorganisms ZJF. The ratio of Serratia sp. to Klebsiella sp. to Pseudomonas putida was 2:1:2 (volume ratio of bacterial suspension). Under the conditions that temperature was 30 ℃, pH was 6, inoculation amount was 10% (volume ratio), initial concentration of NP solutions was 20 mg/L, NP degradation rate by ZJF reached 73.82%, compared with any single strain of the three bacteria, NP degradation rate by ZJF increased more than 15% during 6 days. Bioremediation of nonylphenol-polluted the Yangtze River and the Ancient Canal water by ZJF ware simulated. After a 6-day incubation period, the degrading rate of nonylphenol in Ancient Canal water was close to 80%, and the degrading rate of nonylphenol in Yangtze River water was 72.84%.
Comparative Study on the Governance of SetoNaikai in Japan to Bohai Sea
Authors: yuqiao Li , Yan' an Wang , Yiwen Yin , Wenchun Sun
Published: September 2018

This paper explores Japan's successful experience in controlling SetoNaikai and discusses the enlightenment to China's governance of Bohai Sea. In 2006, the National Development and Reform Commission launched the “Bohai Sea Environmental Protection General Plan" and also announced the failure to implement the “Bohai Sea Clean Sea Action Plan" in the past five years. Similarly, there has been similar pollution in SetoNaikai of Japan. But after 10 years of treatment, it has been quite effective. Through the research methods of international cooperation and exchange, expert interviews and literature analysis, the current situation and existing problems of governance of Bohai Sea are mastered. This paper selects SetoNaikai as the research object, compares the environment and policies between China and Japan and constructs countermeasures and mechanisms of China's environmental governance of Bohai Sea.
The effect of peach-soybean intercropping system with straw mulching on N and P losses, surface runoff in Dianchi Lake watershed mountain area, Yunnan province, China
Authors: Li Zuran , Jiang Xiang , Zu Yanqun , Li Bo
Published: September 2018

Field experiments were conducted with peach (local variety)-soybean intercropping system as an agro-forestry community. The results showed that the reduction rate of CODcr losses were 24.31%, 50.50% and 65.19% respectively under the precipitation strength between 25mm d-1 and 100 mm d-1 with treatments of 36 kg plot-1, 54 kg plot-1 and 72 kg plot-1 straw mulching. The reduction rate of NH4+-N losses were 12.56%, 49.38% and 58.60%, respectively; The reduction rate of NO3--N losses were 27.78%, 9.55% and 58.61%, respectively; The reduction rate of TN losses were 3.85%, 31.67% and 56.01%, respectively. The reduction rate of TP losses were 23.02%, 30.19% and 42.65%, respectively. The yields of soybean increased by 24.09%, 47.46% and 93.84%, respectively. Peach-soybean intercropping with straw mulching could decrease the runoff losses of nitrogen and phosphorus with time effect for reducing non-point sources pollution losses.