bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Conveying Visual Information in Exhibition Place Based on Method of SD
Authors: Li Chun Fu , Chen Lu Ying
Published: December 2014

Exhibition design is the process of conveying visual information and making the audience accepted, which is to translate the visual elements into the visual language receptive for the audience. Method of SD is used to study the factors effecting the visual information conveying in the design of the exhibition space, then the method of factor analysis is used to extract the main factors affecting the results. In the design process, designers can focus on the main factors affecting the effect of information conveying, to achieve the goal of transmitting the exhibits information to visitors to the maximum extent.
Evaluation of Source Rock in Xihu Sag in the East China Sea
Authors: Song Chun Gang , Wang Shu Juan , Zheng Wei Jie , Cao Qiang
Published: December 2014

Xihu Sag is the largest petroliferous sag in China offshore area, which is also the main oil and gas exploration battlefield in the East China Sea shelf basin. Source rock is the main material basis for oil and gas generation, its study has important significance on oil and gas exploration in Xihu Sag. By taking source rock of the Eocene Pinghu Formation and Oligocene Huagang Formation of Pingbei area in Xihu Sag as the research object, static characteristics of source rock in Pingbei Area are evaluated and analyzed in the following three aspects: organic matter abundance, types and maturity. The results show that, based on the organic matter abundance, lower member of Pinghu Formation has a high organic matter abundance, mainly gas, while lower member of Huagang Formation is mainly medium-better source rock, with a common hydrocarbon generating potential. Based on the organic matter types, Huagang Formation and Pinghu Formation are mainly type II and type III kerogen, having a certain hydrocarbon generating potential. While, from the point of view of maturity, lower member of Pinghu Formation is under low mature - mature stage, and the lower part of Huagang Formation mainly under mature to high mature stage. Its hydrocarbon generation peak is basically at present.
Brief Analysis on Design of Experiential Business Landscape
Authors: Lv Yuan Feng , Fan Qiao Si
Published: December 2014

With the emerging of the experience economy and the rapid transformation of business model, Chinese business landscapes have already been unable to cater to the bidirectional demands of enterprises and customers. The design of business landscape needs a new design concept to coordinate with the future development trend of business district. This paper tries exploring the design methods for the new design of experiential business landscape by combining user experience theory with the theory of business landscape design.
Study of Economic Space Development Evolution Features of ESDA Technique in JingJinji Metropolis Circle
Authors: Feng Yi Kang , Wei Jing Mei , Jin Hao
Published: December 2014

ESDA technique in spatial econometrics is utilized for analyzing pattern and evolution of economic and special structure in JingJinji area from 1995 to 2012. Non-agricultural population during the time period is counted; rank scale rule, ROXY index, urban influence and other quantitative methods are applied to systematically studying evolution of scale structure and special structure in urban system in JingJinji Metropolis Circle. Spatial polarization indicators are utilized for estimating space polarization change trend on JingJinji Metropolis Circle during the time period. On the basis, two-dimensional and three-dimensional space expression modes of GIS space analysis technique are adopted for special simulation of economic polarization growth in JingJinji Metropolis Circle in recent 15 years, thereby analyzing special polarization process in JingJinji Metropolis Circle from two dimensions of time and space. The results showed that: 1. JingJinji Metropolis Circle is in dispersed development trend, overall trend of economic space difference is continuously expanded, economic growth polarization of Metropolis Circle is increased with time, economic growth of Metropolis Circle due to change trend of economic center to external space, and it does not completely follow distance attenuation rule.
Water-Urban Harmony Index System: A New Evaluation Model of Urban Water Resources Management
Authors: Zhang Jin Xin , Tang De Shan , Wang Mei
Published: December 2014

Water is the essential element of people's lives, with the rapid growth of population, has become increasingly tense relationship between human and water. In this paper, on the basis of summarizing the existing methods, the application of Chinese traditional harmonious thought, proposes a new model (WUHIS) of assessment of urban human-water relationship, and through the establishment of complete index system to quantify the abstraction of human-water relationship and evaluation. Through three dimensions, the new model from three aspects of the human-water system to conduct a comprehensive evaluation, evaluation of urban river health degree (URHD), evaluation of urban development level (UHDD), and assess human-water coordination degree (HRCD). With relevant data of WUHIS in Xianyang city, Shanxi province, the state of the human-water relationship in Xianyang was assessed from each criterion angle and the result showed that water-urban harmony situation as a whole was on the upswing, but observation of each dimension score respectively, has obvious fluctuation. Through this model, we can clearly know the pros and cons of Xianyang city water resources management, for the Xianyang water resources planning provides a clear direction for the future. This model can be applied in all cities, as long as to modify specific indicators.
The Promotion Policy of Solar Energy Application and its Research Progress for Technical Standard System in China
Authors: Li Guo Yi
Published: December 2014

In this article, we need a set of reasonable design and a high operability technical standard to make the solar energy, as practical application engineering, can be understood or measured in a complex system of progress of technical standard system for industry planning, management and decision support. It can better carry forward the guiding role of existed policies, standards and specifications as well as to promote the level of mainland solar application. In this paper, some latest research of solar energy promoting standards and technical progress was summarized. These studies can provide strong support for decision-making in solar applications planning and management.
Promoting Urbanization Process in ShanDong Province with the Green Development Idea
Authors: Chen Lu Yao , Fang Ping
Published: December 2014

Urbanization rate of ShanDong province reached 50.9% in the end of the year 2012, setting up new choice and opportunity for further development. The basic solution lies in pursuing Green Urbanization. This paper takes samples of various indicators for city construction and development, analyzes the current situation of scientific development in the whole province and compares those of them in each city, finally gives out several suggestions on promoting urbanization development under the scientific concept of Green Urbanization.
Human-Water Relationship Evaluation Based on Cloud Model for Arid Area in Northwest China
Authors: Wang Mei , Tang De Shan , Hu Wei Shan , Bai Yi Fan
Published: December 2014

Human-water relationship evaluation method based on cloud model is put forward to cope with the vagueness in evaluation language. With the intensive study of the specialty in human-water relationship in Northwest China arid area, three dimensions related to human-water relationship, natural water cycle’s health degree (NWHD), Social water cycle’s rationality degree (SWRD) and human-to-water fitness degree (HWFD) are selected to describe the harmony degree between water system and human system. The limit of evaluation index subordinate to each dimension corresponding to every harmony level is determined, and thus we can generate a comprehensive cloud model with evaluation index harmony level. When numeric values substitute for basic evaluation indexes, combined with the weights calculated from entropy weight method and AHP method, we get the certainty distributions of dimension indexes and integration objects among each harmony level. Case shows that human-water relationship evaluation method based on cloud model can effectively solve the vagueness and uncertainty in evaluation language. The evaluation results reflect the harmony degree in Northwest China arid area precisely.
Potentialities Evaluation of Rainwater Utilization in Xianing Port of Changsha
Authors: Wei Yan Jie , Li Guo Yi
Published: December 2014

The Mann-Keddall formula was used for precipitation distribution and variation in Xianing Port of Changsha. The results shown that most rain fell between March and August,the rainfall in these month was about 70% of the annual rainfall. Monthly precipitation between March and July was greater than annual precipitation. Annual precipitation was 1413.5mm, and had the characteristics of uneven distribution and large fluctuation. The potential volume of rainwater for utilization was 1.82×1012m3.
Cost Analysis of Carbon Emission Based on Carbon Finance
Authors: Zhu Nai Ping , Zhao Qi , Shen Yang
Published: December 2014

For the purpose of encouraging enterprises to save energy and reduce emissions from the internal demand and providing insight and inspiration to future study,this article not only describes the carbon finance coefficient model based on factors related to carbon finance but also establishes cost estimation model of carbon emissions according to the factors affecting the cost of carbon emissions and carbon finance coefficient.The resulted shows that carbon emissions currency cost namely the monetary costs of carbon emissions is the market value and the currency value of carbon emissions cost based on the financial market conditions.The result of the present work introduces that the cost of carbon emission has a correlation with prevention costs,cost control,carbon content,industrial added value,carbon finance index and so on so that governments and enterprises should take some measures such as perfecting carbon finance system and setting up the cost control of system consciousness to reduce the cost of carbon emissions and protect our environment.
Experimental Study on Nitrogen Removal of Domestic Sewage Using Two-Stages Soil Aquifer Treatment System with Pre-Denitrification Process
Authors: Tan Geng , Zhang Hao Dong , Wang Yu Ting , Duan Xiao Wei
Published: December 2014

For unstable high water ammonia shortcomings of soil infiltration system for rural sewage, one kind of new soil infiltration systems-two-stages soil aquifer treatment (SAT) system with pre-denitrification process was designed. The results show that when the hydraulic loading is within 0.06-0.08 m3/(m2·d), the effluent CODCr and NH4+-N concentration reach GB18918-2002 level A standard, the removal rate is 91%-94% for CODCr and 95%-98% for NH4+-N. The TN concentration is below 20 mg/L, meeting GB18918-2002 level B standard, and the removal rate is 71%-75%. The TN removal is dramatically affected by reflux ratio.
Study on the Treatment of Soft Soil Foundation Based on the Technology of Dynamic Compaction Replacement
Authors: Shen Yue Guo
Published: December 2014

Foundation treated with dynamic compaction replacement method can not only improve the foundation strength but also improve the drainage condition, which is advantageous to the consolidation of soft soil. Compared with the widely used immersed tube piles, its construction time is shorter and the benefit is obvious. With a warehouse project as an example, this paper expounds the scheme design, parameter selection, test, inspection, etc. in soft soil foundation treatment in muddy geological conditions taking dynamic compaction replacement method.
Approach Emergency Ventilation System of Long Highway Tunnel in Fire Case
Authors: Yang Xiu Jun
Published: December 2014

Ventilation system of highway tunnel is the key factors of keeping normal operations. In addition to the normal operation of keeping tunnel environment, the need to control the spread of smoke and meet requirements of escape and rescue work in fire case. This article describes the design guidelines of emergency ventilation system for different types of road tunnel. This article will help long highway tunnel ventilation system to improve the ability to deal with fire, improve operational safety.
The Optimization Study of Passengers Stop Security in Railway Station
Authors: Chen Jia Juan , Yu Bo Wen , Wang Yong
Published: December 2014

With the growth of railway passenger flow, the demanding of travel safety continues to increase. The optimization of security systems is vital for the safety of the passengers. Scientific and rational allocation of railway stations security equipment for achieving effective security upgrade is of great significance. In this paper, we modeling and simulating using Beijing Railway Station by Flexsim simulation software. We analysis the passenger entering flow line, the number of security equipment, the security system layout, the security level, which obtain the optimal solutions by simulation. We provide a scientific number and a rational arrangement of security equipment program under different circumstances for Beijing Railway Station.
Intersection Safety Evaluation Model Based on Traffic Conflict and Accident Data
Authors: Li Rui , Ge Zhi Peng
Published: December 2014

The severity of accidents can show the dangerous of intersections directly, however, the safety of intersections which have not accident data could not be evaluated easily. This paper introduced “Intersection Dangerous Parameter (IDP)” model to quantify intersections’ safety. Because IDP is calculated based on Intersection Conflict Dangerous Parameter (ICDP) and Intersection Accident Dangerous Parameter (IADP), IDP model can help to evaluate the safety of intersections which have not accident data. Rely on Chinese and American data, IDP model is calibrated and the safeties of three type intersections are evaluated using this method.
Study on Effect of Frame Structures Crossed by Shallow-Buried and Mining Tunnelling
Authors: Wei Gang , Yu Hao Qiang
Published: December 2014

During the shallow-buried tunnel excavation, the formation will be affected and the nearby buildings will be caused fracture. By using three dimensional software MIDAS/GTS, the interactions among structures-soil-tunnel system is considered in this paper, and the working condition of shallow-buried underground excavation is simulated in the independent foundation of frame structures. It is indicated that building will tilt to the side of tunnel as the horizontal distance L between building and tunnels is increasing, after reaching certain distance, the influence to the building tends to little, at the same time, the maximum first principal stress P1 and maximum deformation rate E1 show a trend of decrease. When the kind of soil is worse, the settlement and non-uniform settlement of buildings increase, meanwhile P1 and E1 increase. With the increasing story of the framework, the settlement of building is nearly not affected, and P1 and E1 decrease slightly.
Data Storage Architecture of Maintenance Support System Based on Hadoop
Authors: Han Li Ying , Wang Wei , Hu Nai Wen
Published: December 2014

With the rapid development of rail transit, storage of mass data has become an urgent problem. In view of the problem of insufficient storage capacity and low-efficiency for traditional storage technology, maintenance monitoring data collected by MSS (Maintenance Support System) is taken as the background in this paper [1], an open source framework Hadoop is introduced to build MSS data storage architecture. Through building the virtual cluster environment, the Hadoop technology used in signal system of rail transit is verified feasible.
Hybrid Harmony Search Algorithm for Global Optimization Problems
Authors: Li Guo Jun
Published: December 2014

Harmony search (HS) algorithm is a new population based algorithm, which imitates the phenomenon of musical improvisation process. Its own potential and shortage, one shortage is that it easily trapped into local optima. In this paper, a hybrid harmony search algorithm (HHS) is proposed based on the conception of swarm intelligence. HHS employed a local search method to replace the pitch adjusting operation, and designed an elitist preservation strategy to modify the selection operation. Experiment results demonstrated that the proposed method performs much better than the HS and its improved algorithms (IHS, GHS and NGHS).
Application of Ground Penetrating Radar in Tunnel Concrete Lining Quality Detection
Authors: Zhang Meng Meng , Zhang Xie Dong
Published: December 2014

Ground Penetrating Radar is a method using high frequency impulse electromagnetic wave to detect underground media distribution. It has been gradually widely used as it has the advantage of high accuracy, fast and nondestructive respecting to the conventional method such as visual measurement and confirmation with drilling hole. In the tunnel construction process, it is easy occurred that the quality problem of insufficient lining thickness, the distance of steel arch centering too large and the concrete disengaging. The work achieved in this paper based on the project of LongSheng tunnel and its conclusion and suggestion has important practical engineering significance.
Forward Horizontal Grouting Technology of Subway Station Ends
Authors: Zhao Yu Hong
Published: December 2014

Guangzhou Metro Line 6 the 8th tender Tianhe Station tunnel shielding meet hole body fissure water is abundant, tunnel soil mass disintegrates easily when water permeate, consolidating with end-advancing horizontal grouting technique. By reasonable choice construction equipment, drilling location, double liquid grouting parameters to control the construction process, enhance process monitoring, get a good reinforcement effect; analyzed the prospects of the construction method.
Study Influence on Water and Sediment in Sandbank-Lagoon Harbor
Authors: He Jie , Zhao Xin Sheng
Published: December 2014

Sandbank-lagoons are generally natural harbors for their good defense of wave, deep water near the coast and little source of sediments. Taking Bohe harbor locating on the sandbank-lagoon in South China as the example, water-sediment regime in the harbor block has been studied in this paper. It is shown that wave-induced long-shore current has a significant impact on the sediment movements in the planned harbor block and its back-silting is controlled by SW flow and wave power, and the training dike can trap sediment into the harbor block. And so in the harbor block planned around the west side of Bohe bay mouth not only can shelter the entrance of the lagoon and control wave-induced long-shore current, but also improve environment for back-silting.
Research on Engineering Characteristics of Underwater Neocene Sandstone Located in Lanzhou
Authors: Li Zhao Hui , Zheng Ming Jun
Published: December 2014

In-situ bearing plate deformation test, shear test, tri-axial test and pull-out test of anchor were undertaken with the goal of evaluating the bearing capacity, the water permeability and the lateral fraction of the underwater Neocene sandstones. The characteristic of strength is related to structure of rock mass and especially influenced by humidity environment. Before in-situ testing, high pressure pendulum gush waterproof curtain and well-point dewatering were adopted. The samples of mechanical tests were gained from rotary drilling which drill diameter was 1m. The mechanical strength parameters gained form different tests are analyzed. The results indicate that the underwater Neocene sandstone has pore water, and changes into dense sand permeable layer disturbed by excavating. Mechanical strength is related to environmental conditions significantly and reduces with the exposure time increasing. The characteristic value of subsoil bearing capacity of surface disturbance of underwater Neocene sandstone (UNS) can be corrected similar to sand.
Analysis of Global Safety Degree of Arch Dam Based on Catastrophe Theory
Authors: Sun Lin Song , He Yun Peng
Published: December 2014

The cusp catastrophe theory was introduced to the evaluation of the global safety of a system of an arch dam and its foundation, and the relevant quantitative instability criterion was established. Based on the overload nonlinear FE analysis of a planned arch dam, the global safety degree of this arch dam was 2.75 according to the instability criterion of the cusp catastrophe model of plastic strain energy, and the evaluation result was in agreement with the transfixion criterion of the plastic yield area.
The Application of Grouting Technology in the Reinforcement Project of Montenegro Reservoir in Yunnan Province
Authors: Zhang Liang , Yang Ju Rui , Chen Yu Zhuang , Wang Qiang , Jiang Shi Jun , Li Tan Tan
Published: December 2014

Currently, dangerous reservoirs in Yunnan province are experience one serious common issue: leakage in dam body and dam foundation. To explore solutions for this issue, this study investigated the effects of the application grouting technology on dam seepage and reinforcement using case study of Montenegro reservoir project. Based on numerical simulation (STAB2005 Lizheng software), we can get results after having reinforcement, the dam saturation line was reduced after the reinforcement and the anti-seepage ability was improved significantly in both body and foundation of the dam. Furthermore, numerous successful case studies were reported using grouting technology. In conclusion, grouting technology is highly recommended as a construction method to solve leaking problems in reservoir engineering.
The Application Research on Three-Dimensional GPR Image Used in Grouting Effect Evaluation of Subgrade Void
Authors: Yang Yong Qing
Published: December 2014

On the basis of the GPR method principle, data acquisition and processing, this paper mainly discusses two-dimensional GPR profiles and three-dimensional GPR images through GPR detection example about the voids of highway bridge head subgrade and the grouting distribution. Three-dimensional images accurately and directly evaluate the grouting effect. Thus it illustrates that GPR used to detect the voids of highway bridge head roadbed and the grouting distribution is an effective method.
Analysis on the Technology of Highway Subgrade Disease Prevention and Maintenance in Guangdong Province
Authors: Zhang Luo , Wang Yi Min
Published: December 2014

An analysis based on questionnaire was conducted to study the technology of highway subgrade disaster prevention and maintenance. A serial of questions related to the subgrade maintenance management, maintenance technique, and existing problems were consulted with 39 experts from local highway administrations, highway management and maintenance centers, highway construction Co. Ltd, road maintenance companies in Guangdong Province. The investigation and analysis results provide a valuable scientific reference for further formulating “the technical specification of the highway subgrade maintenance”.
Pile Response Analysis with Unloading Abutment on Soft Ground and Pile Supported Reinforced Embankment Foundation
Authors: Yao Rong , Mao Meng Yun , Que Yun
Published: December 2014

There ware numeral analysis by ABAQUS finite element software to discover the pile’s status with unloading abutment in soft ground, three model were built, first model was unloading abutment and pile supported reinforced embankment, second model was only unloading abutment, third model was only pile supported reinforced embankment, the piles horizontal displacement, axial force and bending moment were discussed; the results show that the piles horizontal displacement with pile supported reinforced are smaller than the others models, pile axial force in three model are little difference.
Study on the Magnitude of the Roadway-Protection Pillar in the Isolated Face
Authors: Li Yan Wei , Meng Lei , Liu Ji Ping
Published: December 2014

In the actual production process, Zhengli Coal Mine has a problem to make sure that the width of chain pillars. This paper from the view of field application with theoretical calculation and numerical simulation method to calculate and verify the stability and security of the chain pillars, It achieved good effect and finally determined the width of chain pillars.
Seismic Design Research of Simply Supported Rail-Bridge Based on Running Safety
Authors: Han Yan , Wang Xiao Dong
Published: December 2014

To explore the practical rail-bridge seismic design methods, dynamic response analysis model of the train-rail-bridge system under seismic loads was established, and the widely used simply supported track-bridge in rail transport was taken for the study. By inputting different intensity and frequency artificial seismic waves to the train-rail-bridge system, the whole history of the vehicles running through the bridge is simulated and the dynamic responses of the bridge and the vehicles are calculated. The influence of train type, seismic intensity and spectral characteristics of the earthquake were analyzed. Taking Japanese traffic safety evaluation indexes including derailment coefficient, wheel offload rate and lateral wheel-rail force as evaluation criteria, the allowed lateral bridge displacement limits and acceleration limits that ensuring train running safety under earthquake were obtained, and the bridge vibration limit curve was drawn. Using Lagrange interpolation method, the mathematical expression of the curve was worked out, which can provide a reference to rail-bridge aseismic design.
Design of 110kV/2kA High Temperature Superconducting Cable Termination Stress Cones
Authors: Song Meng , Wang Zuo Shuai , Ren Li , Zhang Yi , Shen Shi Feng , Hu Nan Nan , Cao Kun Nan , Deng Xu Zhi , Li Jing Dong
Published: December 2014

High temperature superconducting (HTS) cable termination is an important component of the HTS cable system, which functions to connect the HTS cable and the conventional cable accessory. The stress cones of the HTS cable termination can improve the internal electric field distribution and the electrical insulation strength of the cable termination. In this paper, the mathematical model and equivalent circuit model of the stress cones are built and the genetic algorithm is adopted to the design of 110-kV HTS cable terminal stress cone. The capacitance, radial electric field, axial electric field, voltage, insulation thickness and other parameters of the stress cone were compared before and after the optimization of the stress cone. Finally, the simulations of the stress cone with the optimized structure were made using finite-element analysis software COMSOL to test the optimization result.
Study on Protection Configuration of Power Supply in 220kV Electric Railway Traction Substation
Authors: Li Xian , Yu Jin Li , Guo Xin Ju , Mao Yu Bin
Published: December 2014

This article focuses on the characteristics of power supply protection in the Electric railway traction substation and the relationship among the protection configuration, the power grid stability and the security of the main transformer in the traction station. This article analyses the plan of the protection configuration which is safe, reliable, and cost-effective. Also proposes a simplified and optimized scheme.
Simulation Research of the Impact on Sensitivity by Structural Parameters of Disc-Type Inner UHF Sensors Used for GIS PD Detection
Authors: Jia Yong Yong , Yang Jing Gang , Rong Lin , Zhao Ke
Published: December 2014

The UHF method is one of the most important partial discharge (PD) detection means for GIS, while sensor technique is the key factor of the UHF method. In comparison with external sensors, inner sensors can achieve higher sensitivity. The paper firstly presents a key indicator of the sensor performance evaluation, and builds a simulation model of that. Secondly, the paper implements simulation research on the PD detection performance of the disc-type sensor, especially on the impacts caused by structural parameters based on the simulation model. The research achievements of the paper may provide reference of performance evaluation and design optimization for disc-type UHF sensors.
Study on Typical Diversion Structures and Fault of 220kV Cable-Conductor Bushings
Authors: Wu Peng , Xue Na , Yu Chao , Lu Yun Cai , Li Jian Sheng , Wu Yi Ming
Published: December 2014

According to a TOM bushing faults, three typical 220kV cable-conductor bushings (COT, TOM and BRDLW) widely used in the power grid are analyzed about diversion structure. Bushing diversion structure, diversion contact surface, current path and installation sensitivity are discussed in the paper. The study found that installation accuracy of TOM bushing has greater effect on contact resistance of diversion path than others. The improper installation of TOM bushing caused overheating defects and finally developed into this bushing fault.
Direct Power Control of Doubly Fed Induction Generator Based on the Estimated Stator Flux
Authors: Wang Jing , Wang Xiang Dong
Published: December 2014

In order to improve the dynamic performance, based on the analysis of the dynamic model of doubly fed induction generator (DFIG), this paper presents an improved direct power control strategy which is based on the direct control of stator active and reactive power of DFIG. The proposed method only utilizes the estimated stator flux by the stator resistance which is the only machine parameter, so as to remove the power dithering resulting from the inaccuracy associated with rotor flux estimation. In the Matlab/Simulink, simulation results for a 15KW DFIG system demonstrate the high accuracy and excellent dynamic performance during variations of active and reactive power, and revolution.
Research of Test Data of Critical Process Parameters Regarding Tension Stringing Construction of 1250mm2 Large-Section Conductor
Authors: Hu Chun Hua , Xia Yong Jun , Wen Chao
Published: December 2014

The paper introduces field test on critical process parameters regarding stringing construction of 1250mm2 large-section conductor to know the effect of change in single factor among critical construction process parameters such as conductor stringing tension, envelop angle of conductor on paying-off tackles, times of conductor to pass over paying-off tackles, etc. in tension stringing process on conductor damage, analyzes test data and comes to the initial conclusion of effect exerted by tensioning parameters on conductor damage by citing the example of change in stringing tension.
Calculation and Optimization of Cable Connector Electric Field Intensity in High Speed Rail Based on Finite Element
Authors: Jia Bu Chao , Liu Hong Yu , Mu Qing Bo , Ma Jian Qiao
Published: December 2014

When high speed rail run at high altitudes, over-voltage occurred in the process of operating makes the air gap of cable connector breakdown. It is necessary to clear the electric field intensity distribution and its numerical size of cable connector to make an optimization in order to curb this phenomenon. For this reason, 1:1 finite element model is established by the use of ANSYS software, and the simulation results show that the maximum value of the electric field intensity of cable connector can reach 644.05 kV/m. The maximum electric field is reduced with adding an insulating jacket to the head of cable connector. When the thickness of the insulating jacket is respectively 3 mm, 5 mm, 7 mm, 10 mm, the maximum electric field intensity percentage decreased is 10.26%, 11.4%, 16.1%, and 16.7%. So the insulating jacket would be an effective measure to inhibiting the breakdown of the air gap at the cable connector.
The Complex Equivalent Circuit of the Multiple Three-Phase Synchronous Motor
Authors: Lin Peng , Ge Bao Jun , Lü Yan Ling , Xin Peng
Published: December 2014

In order to analyze the transient performance of the multiple three-phase synchronous motor (MTSM) operating at synchronous speed, according to the complex mathematical model and the stator inductance matrix feature of the MTSM, its complex equivalent circuit was studied, and the parameter formulas of this equivalent circuit are presented in the general form. The complex equivalent circuit of the MTSM proposed in this paper is formed by many reactance branches which contain an armature reactance of the one set of three-phase winding and several equivalent leakage reactances, and the equivalent leakage reactances are related to the stator currents.
Isolation and Preliminary Identification of Cellulose-Decomposing Microorganisms Form Bamboo Forest
Authors: Jiang Yu Jian , Yu Xue Jun , Li Xin Xin
Published: December 2014

For the conversion of cellulose into biofuel by microorganisms is being studied intensively. This research isolate and screen efficient cellulolytic microorganism from bamboo forest soil based on growth rate on CMC plate, the size of transparent circle, disintegration effect of filter paper, and CMC enzyme activity assay. As a result, efficient cellulose-decomposing fungus J6-1 was obtained. The strains possessed higher filter paper degrading ability and CMC enzyme activity, disintegrating the filter paper into 42.3% at the 5th days and reaching the highest CMC enzyme activity 6.87IU/mL after 120 hours of shake flask fermentation. Strains J6-1 is preliminarily identified asPenicilliumby morphological observation and a great potential cellulolytic strains.
Design of Current Lead for 50MVA HTS Transformer
Authors: Song Meng , Zhang Yi , Wang Zuo Shuai , Hu Nan Nan , Cao Kun Nan , Ren Li , Shen Shi Feng
Published: December 2014

Compared with the conventional transformer, high temperature superconducting (HTS) transformer can effectively improve the efficiency of the system. The current lead of HTS transformer is a main part that leads to leak out heat, and its thermal leakage loss greatly influents the performance of cryogenic system. So it is important to design and optimize the current lead. In this paper, the current lead of a 50MVA HTS transformer is designed, depended on the calculated conclusion of temperature field with FEM method, the optimization of the current lead is carried out to decrease heat losses.
Micro-Grid Economic Operation Contains Electric Boiler
Authors: Liu Fang , Yang Xiu
Published: December 2014

When Micro-grid (MG) is accessed into large scale of wind turbines, whose anti-peak-adjusting characteristic will increases difficulty of economic and safe operation about MG. The ability to participate in the system peak-adjustment of micro-turbine will be greatly limited, as the CHP run as “heat-load-based” mode and the electric power outputting depends on heat load demand. So that, installing heat boiler to absorb surplus wind power in the anti-peak-adjusting periods, and to combine with CHP supplying heat energy will decoupling “heat-load-based” constraint, and then the flexible schedulability of MG will be improved. The minimum operating cost of MG is regarded as optimizing object, Genetic Algorithm is used to optimize operational status of each unit in MG, then the heat and electricity comprehensive optimization is realized.
Micro-Grid Multi-Objective Optimizing Operation
Authors: Liu Fang , Yang Xiu
Published: December 2014

Reducing environmental pollution and achieving economic operation have become focus of the research about micro-grid (MG). The minimum operating cost and the minimum pollution emission cost are taken as optimizing objects, and the multi-object optimizing model of MG is established. The membership function is used to process multi-objective function, then the conversion of multi-object to single object is achieved. Genetic Algorithm is used to optimize the operating state of each unit, then the best operation mode is formed.
The Research on Relay Protection Settings On-Line Verification System Application in Smart Grid
Authors: Tian Hong Lei , Liu Jian Feng , Liu Yong Kuan , Fang Yuan , Chen Wen Huai , Gao Liang
Published: December 2014

The intelligrid-oriented on-line relay settings verification system based on EMS real-time data are discussed, with related software system designed and fulfilled. Firstly, the research background and current situation of on-line relay settings verification system are summarized. Secondly, the on-line relay settings verification system's general principle, hardware and software design are mainly discussed. And this paper shows the designed hardware structure diagram, the software structure diagram. And the flowchart of main procedure is given. Thirdly, the methods of dealing with EMS real-time data of the on-line verification system are discussed in detail. The verifying principles of sensitivity & selectivity of relay protection are given definitely. It is able to simulate two simultaneous faults, faults in network oscillation, and faults during auto-reclosing. It checks reliability & sensitivity of relay settings under these circumstances. Finally, considering substation-area and wide-area relay protections, this paper points out some key problems of on-line relay settings verification system to be resolved, and its application prospect.
Multi-Objective Dispatch of a Microgrid with Battery Energy Storage System Based on Model Predictive Control
Authors: Zhang Yan , Zhang Tao , Guo Bo , Cai Yong Chao
Published: December 2014

Microgrid has been considered as a new green and reliable power system technique, especially for remote regions. In recent years, there is a steady increasing in studying optimal microgrid deploying and operation strategies. Multi-objective optimization is the most interesting approach for resolving these issues. The multi-objective optimization includes energy operation cost and emission pollutant cost. Potential benefits of using model predictive control (MPC) strategy for multi-objective dispatch problem in microgrid with fluctuant energy resources, such as solar, wind and alike are also presented by comparing with the strategy of day-ahead programming strategy and normal strategy with no battery energy storage. Simulation results show that the proposed model in this paper could reflect the actual characteristics of microgrid more precisely.
Study on the Main Electrical Connection Optimization of Smart Substation Based on Coordination between Power Grid and Substation
Authors: Huang Yang Qi , Liu Nian , Zhang Jian Hua , Qin Xiao Hui
Published: December 2014

With the construction of smart grid and smart substation, influences of the main electrical connection on the reliability of the entire power gird have become more and more important. Therefore, coordinated development between power grid and substation is a key to the design and optimization of main electrical connection. In this paper, the entire equipment in power grid including the main electrical connection is simulated simultaneously, and then the index of power gird with the main electrical connection optimization by disconnecting circuit breaker is calculated. Optimization schemes are sorted by the method of TOPSIS, realizing the evaluation of main electrical connection based on coordinated development between power grid and substation.
Research on Clock Synchronization Scheme of Intelligent Substation Based on EPON Technology
Authors: Ma Ping , Zhu Ma , Gao Jun Li , Li Yang , Feng Bao
Published: December 2014

With the development of digital and intelligent trend of substation, higher requirements on communication network were put forward. With features of high bandwidth, low cost, high reliability, easy maintenance, EPON has been widely applied in the field of distribution communication network. But precision of time synchronization is insufficient while bearing intelligent substation services by EPON. For providing sub microsecond time synchronization, IEEE 1588v2 can solve this problem. Based on depth study of EPON synchronization technology and IEEE 1588v2 protocol, a novel method to implement high-precision time synchronization based on EPON technology in intelligent substation is proposed. Through test, the proposed scheme has very good time synchronization performance. It can well meet requirements on precise time synchronization in intelligent substation.
A System Dynamic Simulation Model for Chinese Residential Electricity Price
Authors: Luo Bin , Huang Chen Yu , Chen Zhuo
Published: December 2014

Based on the current system dynamics theory and related research experience, we construct the residential electricity price (REP) dynamic simulation model including the subsystems such as residential affordable price, feed-in tariff and distribution price. Then, taking Beijing for an example, we make the simulation of the REP policy and summarize some valuable results.
Thermogravimetric Study on the Co-Pyrolysis Characteristics of Bituminous Coal and Wheat Straw
Authors: Yan Xin Ping , Bai Ji Song , Zhou Xiong , Lin Shun Hong
Published: December 2014

In this work, the pyrolysis behavior of bituminous coal (BC) wheat straw (WS) and the blends were investigated by thermogravimetric analysis. It was found that the main thermal degradation stage of BC and WS lies in different temperature range and there is nearly no overlapping. Interaction was observed during the co-pyrolysis process of BC and WS. At high temperatures, the volatile releasing is slightly inhibited by WS addition. Coats-Redfern method was used to analyze the apparent kinetic parameters. The results indicated that both the two reaction stages during pyrolysis process are well correlated by first-order reaction. The variation trend of activation energy value further confirm the synergistic effects between BC and WS. The experimental results may provide useful data for co-thermochemical utilization of biomass with coal.
Implementation Effect Evaluation of Tiered Electricity Pricing for Residents Based on Fuzzy Analytic Hierarchy Process
Authors: Hu Jun , Li Tian Ran , Zhao Cai Hong , Sun Lin , Li Han Yi , Chen Xiao , Chen Zi Qi
Published: December 2014

In this paper, the fuzzy analytic hierarchy process (AHP) is used to establish the comprehensive evaluation index system for tiered electricity pricing scheme. First the calculation method of each factor is given, and it is translated into centesimal system. Than the fuzzy analytic hierarchy process (AHP) is used to calculate the weights of each factor. This evaluation method quantifies the qualitative indexes, to enhance the scientific and reliability for evaluation of tiered electricity pricing.
Load Clustering Based on SVC Algorithm
Authors: An Xiang Yang , Liu Ji Chun , Sun Yu Le , Li Gang , Liu Jun Yong
Published: December 2014

With the development of electric power system, the people pay more attention to demand-side management. Valid for load classification is an important prerequisite for improving demand side management level. Based on common indicators and load clustering algorithms, new SVC algorithm, cluster validity analysis and similarity measurement of the impact of the judgment are proposed based on load clustering method, and finally the effectiveness of the method is demonstrated by an example.
Investigation the Possibility of Using SVD to Select the Direction Input the Operation Point into the Feasible Region
Authors: Yuferev Sergey , Gerasimov Konstantin , Gerasimov Krum
Published: December 2014

This paper is provided a method of input the operation point of the electrical power system, located on the existence boundary, in the permissible values range for a given value of the stock. Also the some results of the effect of weighting coefficients accounting for the resulting capacities adjustment using the Newton's method in optimization. The investigations were carried out on a five node test scheme.
The Study of High Pressure Pulse Circuit in Ultrasonic Nondestructive Testing
Authors: Wang Hong Yun , He Peng
Published: December 2014

This text mainly introduced the high pressure pulse circuit within the ultrasonic nondestructive testing system.Up on the circuit principle and imitate experiment,point studied the selection of capacitance,resistance parameter impact to tansmit circuit.Propose the low DC.power supply scheme,and solved the problem that the structure of circuit is complicated and cost higher,the disadvsntage is at the laboratory,such as use and search.
Implementation and Design of Voltage-Mode PWM Control CMOS Boost Power Converter with Protection Circuits
Authors: Lee Min Chin , Hsieh Ming Chia , Lee Yong Ruey
Published: December 2014

A lower power consumption, smaller output ripple and better regulation boost power converter controlled by voltage feedback and pulse-width modulation (PWM) mode is implemented in this paper. The over-current protection and soft-start circuit can produce a slowly rising output voltage without extra clock or any external component to prevent inrush current and output voltage overshoot during the start-up period of the converter. The converter is designed and simulated using the TSMC 0.35μm 2P4M CMOS Process. Hspice simulation results show that, the boost converter having chip size with power efficiency about . This chip can operate with input supply voltage from to , and its output voltage can stable at and less than ripple voltage at maximum loading current . The simulation shows the circuit has about of soft-start time and can inhibit the inrush current when the power on.
Using LLC Resonant Converter for Designing Electric Vehicle DC/DC Converter
Authors: Wu Tong Li , Wang Ke Hong , Yang Jia Jia
Published: December 2014

A design of 100 kHz-1350 W electric vehicle DC/DC converter using LLC resonant converter with integrated transformer is presented. The loss analysis based on theoretical derivation is performed to reveal the loss distribution. Integrated magnetic structure is adopted in the design to further increase the efficiency and power density. A 280 V-360 V input, 13.5 V/100 A output prototype is built to verify its advantage, and the efficiency at 320 V input, 13.5 V/100 A output is 91.5% at the switching frequency of 100 kHz.
Design of Magnetic Integrated Transformer for LLC Resonant Converter
Authors: Wu Tong Li , Wang Ke Hong , Yang Jia Jia
Published: December 2014

There are altogether three magnetic components in the resonant tank of LLC resonant converter: the series resonant inductor, the parallel inductor and the transformer. The method to realize the magnetic integrated transformer in LLC resonant converter is presented. The design process is provided, and a magnetic integrated transformer is constructed and the test results correspond well with the design values. A prototype of 1350 W, 100 kHz LLC resonant converter type electric vehicle DC/DC converter equipped with the magnetic integrated transformer is built to verify the performance of the magnetic integrated transformer, and the efficiency at 320 V input, 13.5 V/100 A output is 91.5% at the switching frequency of 100 kHz.
Study on Multi-Objective Optimal Planning of Electric Vehicle Charging Stations with Alternative Sites
Authors: Chen Guang , Song Zhuo Ran , Dai Pan , Liu Yang , Ma Yong
Published: December 2014

Planning of charging stations for electric vehicles (EVs) is the foundation of EV’s promotion and development. A novel multi-objective optimization model is proposed in this paper to better locate and size the charging stations for EVs from given alternative sites. Economic costs of charging station and the time wasted in waiting for charging are minimized in the model. The capacity constraints of the charging stations are included as main constraints. Pareto front is used to compare and estimate the practical value of the current substation locating and sizing plans. A calculation method based on rasterization and Voronoi diagram is proposed to make it clear where the jurisdiction of each charging station ends. Finally, the proposed model and calculation method are verified using case study.