bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Coding Problem of Andriod Network Communication Based on the MINA
Authors: Yang S.L. , Hu J.P.
Published: March 2015

How to overcome the limitations of wireless networks and mobile devices,improve the network performance and ensure data integrity codecorrectness and data transmission, is still a major problem faced by theAndriod mobile terminal application. Based on the analysis of
The coding and decoding principle of Mina, discusses how to ensure the integrity of the problems of correctness and data transmission code, it solves broken bag problem, data type conversion and batch conversion etc.. The proposed scheme receive good effect in the application of printing machine maintenance control in the terminal.
Design and Realization of RSA Digital Signature System Based on Digital Certificate
Authors: Wei Yan Na , Jin Y.T. , Zhou J.W.
Published: March 2015

Digital signature plays a more and more important role in e-commerce. The basic methods of digital signature are introduced and a digital signature scheme based on digital certificate is proposed in this paper. Digital certificate is generated after personal information is written. The effective data, RSA parameters and signature results are included in digital certificate. The related RSA parameters of private key certificate are encrypted by private key password. The digital digest is gotten through hash algorithm in this scheme. Digital signature is operated by using RSA parameters in private key certificate and the signature is verified by RSA parameters in public key certificate by verifier.
The Mobile Internet-Based Explosion-Proof LED Lamp Intelligent Lighting System
Authors: Du J.B. , Xiong Feng , Yu Tao , Li Jun Shi
Published: March 2015

Systems in the real world are becoming more intelligent, however intelligence has not been widely applied to lighting systems, which are necessary and indispensable parts of human life[1].In this paper, we propose a explosion-proof LED intelligent lighting system for the chemical production, it integrates MCU technology, sensor technology, ZigBee wireless communication technology, WCDMA 3G mobile internet technology, it could overcome the defects of traditional lighting in the chemical production, like poor management, single control, waste of human resources. The level of explosion-proof safety and lighting efficiency will be enhanced.The system could be an instance of intelligent lighting applications.
An Improved LEACH Protocol in Wireless Sensor Networks
Authors: Liu L.F. , Guo P. , Zhao J. , Li N.
Published: March 2015

Wireless sensor network routing protocol is to prolong the survival time of wireless sensor networks by using the sensor nodes energy efficiently. Traditional LEACH protocol is random in the election of the cluster head, if a less energy node is first elected as a cluster head node, then the node might die soon, it will greatly reducing the lifetime of the network. In order to collect data more efficiently and prolong the network life cycle,we need better clustering protocol. Aim at the traditional LEACH protocol have some weakness,this paper improve the protocol based on traditional LEACH protocol, two influence factors which the residual energy and the number of elected cluster head of the nodes had been introduced to make the clustering more ideal. Simulation results show that compared to the traditional Leach algorithm ,the improved LEACH protocol can prolong the network life cycle more effective and reduce the energy consumption of the whole network.
Vehicle Networking Technology Promote the Development of Intelligent Transportation
Authors: Hu Y. , Xiao Y.H.
Published: March 2015

Nowadays the vehicle networking technology which is to solve the transportation problems such as traffic safety, efficiency, environment, has gained tremendous progress. This paper introduces the basic concept of vehicle networking, then gives a comparison of development of vehicle networking at home and abroad, also takes a look into industry pace, industry development situation and scale of the domestic and foreign vehicle networking, prospects the future and trend of vehicle networking and puts forward some suggestions for the development the vehicle networking industry.
Research and Application of WSN in Enterprise Safety Manufacture Real-Time Monitoring and Accident Pre-Warning System
Authors: Mei D.H. , Song Z.Y.
Published: March 2015

In recent years, enterprise manufacturing safety accidents have taken place frequently in China. We propose an application of wireless sensor network (WSN) in the enterprise safety manufacture real-time monitoring and accident pre-warning system (RMAPS), illuminate the principles and advantages of WSN, as well as the design basis of WSN in the system in this paper. Based on the current situation of low level of intellectualization in the RMAPS system and the existing problems, we propose the designing principals and the monitoring mechanism of the RMAPS system, study the feasibility, the method and the way of the application of the WSN in the RMAPS system in this paper.
Coherent Distributed Detection Using Inhomogeneous Sensors Under Local Power Constraint
Authors: Xu Z.H. , Li J.Y. , Wang J.
Published: March 2015

In this paper, we consider the problem of local power constrained coherent distributed detection over fading multi-access channel (MAC). The deflection coefficient maximization (DCM) is used to optimize the performance of fusion system under local power constraint of sensors. We use the statistical information of channel gain to obtain the deflection coefficient of the detection statistics at the fusion center. We derive the closed-form solution to the considered optimization problem. Monte-Carlo simulations are carried out to verify the performance of the proposed method. Simulation results show that the proposed method could significantly improve the detection performance of the fusion system under local power constraint and low signal-to-noise ratio (SNR).
Influence of Micro-Morphology on Thermal Elatohydrodynamic Lubrication of Water-Lubricated Tenmat Bearing
Authors: Dong Ning , Wang You Qiang , Liu Qian , Huang Xing Bao
Published: March 2015

The elastohydrodynamic lubrication numerical analysis of water-lubricated tenmat bearing with single sine-type peak, single V-type valley and single rectangular-type valley was carried out by using the Reynolds equation. The results show that, for the bearing with single peak, the partial pressure peak appears and the corresponding film thickness increases rapidly and then decreases; With the increase of the amplitude of the sine function, the partial pressure of the lubricating film is also increased, the partial film thickness is decreased, as the wavelength increases, the pressure and the film thickness of the convex portion widened, the peak remains substantially unchanged. For the bearing with single V-type valley and single rectangular-type valley, the partial pressure are decreased, the partial film thickness are increased; with the amplitude of the roughness function increases, the partial pressure are decreased, on the contrary ,the partial film thickness are increased; with the wavelength increases, the pressure and the film thickness of the convex portion widened.
Inversion Algorithm and Precision Analysis for AMCW DIAL Measurements of CO2
Authors: Ge Y. , Hu Yi Hua , Shu R. , Zheng L. , Liu H. , Hong G.L.
Published: March 2015

Based on the theory of differential absorption, an amplitude modulation continuous wave (AMCW) differential absorption lidar (DIAL) aiming to measure the concentrations of CO2in the lower troposphere has been developed. The analysis methods of received envelope signals were discussed in detail first. Three different cumulative averaging methods were also analyzed and the compared results pointed out that the orders have little impact on our system. Moreover, the limitation in the improvement of standard deviation of the ln (ratio) through signal cumulative averaging was also analyzed, which showed departures from theoretic N-1/2dependence improvement. Then a novel precision estimate method was proposed, which showed the resolution a 1.1% standard deviation or less in our system. The trend of CO2concentrations during two days in the urban district of Shanghai was presented in the end.
Numerical Simulation Study on Technology of the Top-Down Bored Excavation with Cast-In Situ Arch
Authors: Wang Zhong Ren
Published: March 2015

The top-down bored excavation with cast-in-situ arch method has many advantages, such as forming a complete and stable mechanical structure, reducing construction procedures and the frequency of structure transformation, improving the stability of structure during the construction and so on. According to the specific project of single span top-down bored excavation duct in Changchun Liberation Road station, numerical simulation method is used and finite difference software FLAC 3D is adopted in this paper to analyze and research the applicability of the top-down bored excavation with cast-in-situ arch method to this project. Then optimization analysis for excavation sequence of pilot tunnel is done and the optimum construction scheme is raised to guide the practical project. This research has certain practical significance and also provides references for similar projects.
Experimental Study on Treatment of MBR Effluent of SODOTM Catalytic Ozonation Technology
Authors: Huang Qi , Li Huan Huan , Gao Chao , Yuan Yi Fang , Hu Feng Ping
Published: March 2015

This experiment used SODOTM ozone catalytic oxidation technology treated MBR effluent of a advanced treatment project of water treatment company in pilot scale test, which studied the effect of SODOTM oxidation and resolved the problem of MBR effluent drainage system can not meet the standards of "Discharge standard of pollutants for municipal wastewater treatment plant " (GB18918-2002). Operating parameters of the test device: Ozone dosage was 200mg/L•h, system contact oxidation time was 4h, the average of effluent CODCr was about 100mg/L by controlled the dosage and other parameters at the economical operating conditions.
Harmonious Allocation Model of the River Diversion Standard under Synchronous Construction of Hydropower Stations
Authors: Xue Jin Ping , Hu Zhi Gen
Published: March 2015

It is incapable for current method to establish the diversion standard when two hydropower stations are constructed synchronously. Hence this paper studied it from the perspective of harmonious allocation with considering the balance between economy and safety. Firstly, the risk estimation model of each diversion system under such condition was established in which the composition theory of regional flood was introduced to calculate the changed flood and the Copula function was adopted to construct its probability distribution. On this basis, with treating the adjacent diversion system as a whole, the allocation model of the diversion standard was established in which the life cycle cost (LCC) was proposed as the evaluation index. Aimed at the minimum of the LCC of the serial diversion system, the optimum diversion standard combination was ascertained. Finally, an engineering case was presented to validate the feasibility and effectiveness of the proposed model. And the study can offer the theoretical basis and technical reference for the control of the construction flood in the development of the cascade hydropower station.
Research on the Effect of Freezing of Pumped Storage Power Station Upper Reservoir’ Bank in Cold Regions
Authors: Ma Dong He , Li Yan Ping , Xu Yan Bin , Liu Zhong Fu , Xu Shuang , Ma Yu Min
Published: March 2015

This Water level change of upper storage reservoir of pumped storage power station is frequent and big. The change leads to freezing damage on and adverse impact on bank stability of reservoir in cold zone. For above problems, combining with the running project, using dynamic ice condition image shooting system, vibrating ice pressure gauge , the characters on reservoir bank destroyed by coldness and action rules of ice pressure on bank slope were studied in depth. The scientific prevention measures were proposed. The monitoring period of maximum observed ice pressure is 21kPa, the magnitude of ice pressure on the hydraulic structures without causing a significant threat. Because of the action of buoyancy, the bank around the dry stone pitching occurred in a large scope to armour stone are pulled out as the main form of failure. The research results will have significance on freezing damage prevention scheme formulation of reservoir bank of pumped storage power station in cold zone.
Study on Selection of Typical Year with Water and Sediment Based on Fuzzy Clustering Iterative Model
Authors: Xia Li Min , Li Yu
Published: March 2015

In order to reasonably and effectively select the typical year with water and sediment from numerous data, an analysis method of fuzzy clustering iterative model was proposed. Based on the example of Jinji hydrologic station, this paper calculates the model and compares it with the the traditional frequency method. Result shows that it was typical in terms of total amount and distribution of flow and sediment to use this method, and the subjectivity of index weight and classification standard of water and sediment is avoided by using this model. So the method is objective and rational.
The Application of SWMM in the Analysis of a Campus Drainage System
Authors: Fu Zheng Rong , Zhuang Jia Xin , Wang Liang Zhu
Published: March 2015

The drainage system of a part of a university campus was tapped using SWMM (Storm Water Management Model). Local drainage discharge capacity was studied under different design storm return period. Results show that flooding and overload at some junctions and in some conduits are doubled with the increase of design rain return period from one year to five year, which may deteriorate the traffic and road base.
The Improved Trial Method of Hydrogeological Parameters Inversion by Using Single Well Recharge Formula
Authors: Yan Qiao
Published: March 2015

Based on the related theory under recharge condition, the trial method solving the hydrogeological parameters of unsteady flow by single well recharge test according to Theis Formula can be gotten. Integrating the cubic spline interpolation curve of the parameters into the said trial method, the improved trial method of inversion hydrogeological parameters is worked out by using single well recharge formula. In this method, the cubic spline interpolation curve is constructed from three groups of initial adjacent comparison points at first. Then the fussy trial process of the traditional trial method can be replaced by line-line intersection. It can be seen from the practical verification of the data of underground water manual recharge test somewhere in Xi’an City that the calculation steps here are greatly simplified comparing to the traditional trial method. And the calculation result is basically the same with the existing data, which shows that this method is simple and effective.
Numerical Simulation Analysis of Collision between Ship and Steel Sheet Pile Quay-Wall
Authors: Liu Peng , Wang Hong , Zhu Chao
Published: March 2015

The impact process of 50000t ship and steel sheet pile bulkhead is simulated by finite element software ANSYS/LS-DYNA. This article acquires the impact force-time curve, equivalent force-time curve of steel sheet pile and the pressure-time curve of breast wall. Comparing the impact force of numerical simulation with the result of ship-bridge collision specifications, and general rules and characteristics are obtained. At the same time, put forward some measures to prevent the damage of wharf structure under the ship of large velocity impact, which provide theoretical references during the design, maintenance, and transformation of similar wharf.
Pavement Performance Comparison of Bituminous Mixtures at Surface Course
Authors: Cheng Ying Wei
Published: March 2015

The pavement performance study of bituminous mixture at surface course is very important. This paper focused on comparing the pavement performance of AC-l6C, AC-l6F, Super-12.5 and SMA-16 bituminous mixtures. First the gradations and material we used were illustrated. Then the dynamic stability, water stability and texture depth of these bituminous mixtures was tested. After comparing the test data, we found that the SMA-16 bituminous mixture has the best comprehensive pavement performance and it is most suitable for the surface layer bituminous mixture of freeways in Chinese Hubei Province. Super-12.5 and AC-l6C is applicable too, but AC-l6F is improper in this region.
Research on Using Track Quality Index (TQI) to Reasonably Arrange Line Maintenance and Repair Cycle
Authors: Zhang Tao , Xu Wen , Sun Wei Long
Published: March 2015

Combined with the test data from track inspection car in some section of Lan-Xin railway, the paper researches the application of TQI in guiding line maintenance and repair. Analyze the changing trends of rail operation quality according to the statistical data, put forward calculation method of the average line deterioration index to the particular section, predict the track quality life and the maintenance cycle, and reasonably arrange the maintenance and repair time during line overhaul. By accurately using the value of TQI to guiding line maintenance and repair, rationally plan the best time of maintenance and repair, ensure the line in equilibrium and steady state.
Failure Mechanisms of Stone Masonry Dome
Authors: Hara Takashi , Hidaka Kenichiro
Published: March 2015

This paper investigated the failure mechanisms of the stone masonry dome constructed in the heritage site at Jerash. Jerash is the remains of a Roman ancient city and is located 48km north from Amman, Jordan. West Bath in Jerash had one main dome and two small domes. Domes were constructed from stone masonry. The structural characteristics of the remained small dome were investigated numerically by use of the finite element method. The foundation of the West Bath is under the conditions of a land sliding and was cut beside the dome pier. Therefore, assuming the several uneven settlements of the piers, the structural behavior of the dome was assessed. From the distributions of the cracking and the crushing of the stone, the failure mechanisms of the stone masonry were represented.
Rail Damage Detection Based on AE Technology and Wavelet Data Processing
Authors: Song Yang , Wu Fan
Published: March 2015

In order to improve the accuracy and reliability of the defect recognition in rails, the new principle and methods of NDT should be explored, and the safety of railway operation and guiding the repair can be guaranteed. The study is aiming at comparing and analyzing the characteristics of destructive data signals with non-destructive ones. The damage and defect can be judged by the differences of the processed data in the frequency domain and energy spectrum. The location of the defect and damage can be obtained by the singularities of destructive signals using wavelet data processing method: continuous wavelet transform, Mallat algorithm and à Trous algorithm. Based on the above consequence, à Trous algorithm is found that its result is more similar to the real damage location, which proves that the method can be used in the real damage detection and provide us more precise defect location information for early warning.
Analysis on Fatigue Failure Modes of Reinforced Concrete Beams Strengthened with BFRP
Authors: Chen Xu Jun , Dai Mu Xiang , Yang Zhong
Published: March 2015

The fatigue failure modes of reinforced concrete beams externally strengthened with basalt fiber reinforced polymer(BFRP) sheets was examined in an experimental and analytical study. One strengthened beam failed due to the debonding and fracture of U-wraps FRP sheet at the anchors,and the others failed the fatigue fracture of the longitudinal tensile reinforcements. Based on Code for Design of strengthening concrete structure, the fatigue failure of RC bending members strengthened with FRP was analysed,and the indicate that with reinforcement ratio of 0.612% and fatigue stress ratio of 0.3, only the fatigue fracture of steel bars occured rather than the crushing of concrete in the compression zone.
Research on the Influences of Crack-Depth Ratio on Fracture Energy of Ultra-High Performance Cementitious Composites
Authors: Wang Hai Chao , Liu Long Long , Gao Shu Ling , Yang Zhi Gang
Published: March 2015

For the study of fracture characteristics of ultra-high performance cementitious composites(ECC),16 different sizes of three-point bending beams were made and ultimate load, ultimate deflection and crack mouth opening displacement ,the curve andcurve of ECC were contructed,with the method of fracture work recommendedby RILEM , the external work was respectively calculated by the curve ofand, which determined the fracture energy of ECC.Results show that two kinds of calculation result are roughly equal;The influence of size effect on fracture character was: fracture energy increased with the increasing of the crack-depth ratio, the fracture energy of concrete specimen is the maximum when the crack-depth ratio is 0.4 ; is proportional to the initial crack-depth of the specimen, but there is no relationship betweenand crack-depth ratio. This paper would have great significance for the study of fracture characteristics of ECC.
Study on Characteristic Optimization of Shearing Viscoelastic Damp
Authors: Zhang Chun Xia , Lan Tao , Wang Yu
Published: March 2015

This paper studies characteristics optimization of shearing viscoelastic damp of the SDOF system. Theoretical analysis included geometry and nechenical property of viscoelastic material and characteristics of connecting bars. Studies indicate varied thickness,shearing area and plies of viscoelastic material cause changes in modulus of shearing storage mudulus and shearing loss modulus and next experimetns shows effect of destortion, exciting frequncy and repeated cycles. The stiffness of connecting bar effect the effeciency of damp and the internal force of the structure, so the selection of connecting bar is very important in characteristic optimization. Contrast by the no simplified model and the simplified model indicated stronger connecting bars effect the inner force of the whole frame more notably, so the negative effect should be considered when using the simplified model. A procedure to find the optimal characteristics of shearing viscoelastic damp for SDOF system is proposed then. This procedure targets maximum damp ratio and minimum section of connecting bar. A predefined damp ratio excite the procedure and every step set an increment in damp ratio simultaneously stiffness of the connecting bar is computed. The procedure repeated until the damp ratio approaches an ideal value and the stiffness declined to a relative lower point then. All the characteristics can be determined according to the damp ratio and manufacture conditions at last. And an exanded procedure used in n-DOF system including both optimization of characteristcs and arrangement is expected in the end.
Study on the Impact of Polycarboxylic Acid Additive Experimental Process Parameters on Cement Adaptability
Authors: Wang Hai Chao , Li Wei Wei , Sun Fang Ning , Yang Zhi Gang , Chen Chen , Zhao Chun He
Published: March 2015

By analyzing two Polycarboxylate cement admixture of different polymerization process adaptability, the cement paste experiment is carried out to show the influence of Polycarboxylate superplasticizer, slump agent and the cement synthesis process on cement adaptability. Through orthogonal design method, result is drawn from the comparison of the influence of initial liquidity and an hour liquidity under different conditions,which is base on treating Polymeric acid process parameters as effecting factor within a certain range. It is shown that the preferably optimized process parameters of Polycarboxylic acid exist in the same kind of cement.The system error caused by the impact of cement composition is indicated in different kinds of cement.The adaptability of Polycarboxylic acid cement admixture of the mother liquor is available in the process optimization of the parameters.
The Influence of Different Asphalt on the Comprehensive Performance of ATB Mixture
Authors: Rui Fang , Hua Lei
Published: March 2015

By comparing the study of 50# and 70# matrix asphalt and SBS modified asphalt to the influence law of high temperature performance, low temperature performance and water stability performance of ATB mixture, it can balance the relationship of the performance of every road in design method of ATB mixture. It suggests that we can use SBS modified asphalt in the condition of usually, use Low grade matrix asphalt or SBS modified asphalt in the condition of higher temperature requirements for the road , and use High grade matrix asphalt or SBS modified asphalt in the condition of the road in cold region.
Effect of Palm Oil Fuel Ash (POFA) on the Durability of Asphaltic Concrete
Authors: Maleka Abdulmalik Musa , Hamad Ahmed Wsoo , Jaya Ramadhansyah Putra
Published: March 2015

The Cantabro durability test is usually used for open graded asphalt mixtures and has seen little use with dense graded mixtures. This paper presents durability data from the Cantabro test for Palm oil fuel ash (POFA) modified dense graded asphaltic concrete AC 14. The nature and amount of filler in an asphaltic concrete mixes significantly affect its design and performance. POFA is an ash obtained from the burning of waste material generated from the production of crude palm oil which is of high quantity in Malaysia. A number of trial mixes were prepared using the Marshall Mix design procedure with 5% POFA and 1% Ordinary Portland Cement (OPC) as filler materials to arrive at asphalt concrete mixtures that fulfil the Marshall criteria. Cantabro durability test was used to measure the durability of the asphaltic concrete. The results show that Marshall stability, flow, stiffness and cantabro loss values shows general improvement for the POFA modified asphalt compared to the control specimens.
Reflections on the Detection Method of Polycarboxylate Superplasticizer
Authors: Yao Ling , Li Shi Wei , Li Chao
Published: March 2015

According to the detection method of "Polycarboxylates high performance water reducing admixture"(JG/T223-2007), the different concrete mix ratio with different binder systems were designed to test the air-entraining content and compressive strength ratio for 3days of the HSP-V and PCA-II polycarboxylate superplasticizer. The results show that the mineral admixtures can reduce the air-entraining content of the HSP-V and PCA-II polycarboxylate superplasticizer, and lead to the compressive strength ratio for 3 days improved. Therefore mineral admixture on polycarboxylate superplasticizer should be fully considered, in order to adapt to the needs of the practical engineering.
BIM Based Green Building Management Development in the U.S.
Authors: Yang Yun Hui , Ren Bi Bo
Published: March 2015

Green building or sustainable building and BIM are advancing on the construction industry faster than most practitioners’ anticipation around globe today. BIM adoption in construction has changed the existing construction industry practices to achieve better results with higher quality green buildings that perform at sustainable facilities and reduced costs, BIM provides the opportunity to realize numerous benefits throughout the project conception, design, construction and post occupancy phases of a green building facility, and BIM is also establishing a measurement standard for what is considered a green building. This paper represents the BIM applications in the U.S. green building management development with respect to various aspects of practice in construction.
Impact Dynamics of Flexible Multibody System Based on Continuous Contact Force Method
Authors: Duan Yue Chen , Li Xia , Zhang Wei Wei , Liu Guo Ning , Wang Ting Ting
Published: March 2015

The impact dynamics of spatial multi-link flexible multibody system is studied based on the continuous contact force method (CCFM). According to the rigid-flexible coupling dynamic theory of flexible multibody system, the rigid-flexible coupling continuous dynamic equations of the system are established by using the recursive Lagrange method. The impact dynamic equations of the system are stylized derived on the use of CCFM basing on the nonlinear spring-damper model. The contact separation criterion is given to achieve the conversion and calculation of the dynamic model for the system at different stages. An impact dynamic simulation example for a two-link planar flexible multibody system is given, as well as the global dynamic response. The results show that the impact dynamic solving method based on CCFM can be used for the global impact dynamics of multi-link flexible multibody systems. The dynamic behavior of the system changes dramatically during the impact process. The large overall motion, the small deformation motion and the impact effect are coupled.
The Antiplane Shearing Problem of Circular Holes with 4k Periodic Cracks in One-Dimensional Hexagonal Quasicrystals
Authors: Chen Zhu
Published: March 2015

Using the method of complex analysis and by constructing conformal mapping, the study investigated the antiplane shearing problem of circular holes with 4k periodic cracks in one-dimensional hexagonal quasicrystals. Wherefrom we simulated the problem of antiplane shearing in circular holes of cross-cracks, symmetrical four-cracks, as well as symmetrical eight-cracks, and provided an analytic solution to the crack tip stress intensity factor (SIF).
Development of Strain Measurement System Based on Virtual Instrument Technology
Authors: Zhang Ying
Published: March 2015

Based on LabVIEW and CompactRIO platform, a strain measurement system was developed for structure monitoring. The design and achieve method of the system is introduced in detailed. The module of NI 9235 is used to realize the multi-channel signal acquisition at the same time. Data processing and storage online is supported. At last, a test is hold to verify the validity of the system. Comparing with traditional strain measurement system, the system proposed in the paper is stable and reliable. And it is easy to carry, simple operation, performance, high efficiency and good expansibility. The new system with those advantages can adapt to all kinds of complicated and special working environment. It is totally possible that virtual instrument replace the traditional system complete. The new system is worth to promote in application.
Direct Measurements of Land Surface Deformation Based on PS-InSAR in Lanzhou, China
Authors: Xue Ya Ting , Meng Xing Min , Chen Guan , Li Kai
Published: March 2015

Surface deformation is a slow and irreversible change. It is impacted by topographic, geologic and human activities. To investigate the spatial distribution of surface deformation in Lanzhou, we used PS-InSAR technique. PS-InSAR is a remote sensing method that can be used to detect surface deformation: an indicator of potential hazards. By capturing these deformations over a period of time, we can get valuable information about impending geohazards, such as landslides. This study focused on using this technique to investigate the distribution and cause of surface deformation in the region around Lanzhou, the capital of Gansu Province, China.
Influence of Fly Ash to Concrete Protecting Steel Corrosion Ability
Authors: Yang Qiao , Zhu Xiao E
Published: March 2015

The compressive strengths of the concrete cubes added fly ash were increased 53.2%, the density was almost unchanged, but the water absorption was decreased 30%. The concrete permeability coefficient and chloride diffusion coefficient added fly ash were lower than the common concrete at all ages. The concrete specimens corrosion potential added fly ash were higher than-300mV, while common concrete almost were lower than-500mV. Corrosion probability was small and there was no crack and corrosion pot on the surface of the specimens until 82 times cycles in wet-dry chlorides solution. Fly ash in concrete has obvious act for improving concrete behavior in protecting the embedded steel in corrosion.
Correlation Model between Speed and Density of Electric Bicycles at Signalized Intersections
Authors: Shen Jia Jun , Wang Qun , Cao Zhi Ming
Published: March 2015

In order to explore the characteristics of electric bicycles at urban intersections, the model between speed and density was developed. Coordinates of electric bicycles were obtained based on photogrammetry, and 85% riding width was proposed to be the design width through the analysis of relationship between cycle volume and riding width. In addition, the model between speed and density were obtained through data fitting, which was almost a linear function. The speed and riding width can be obtained through the model on the basis of the volume of electric bicycles, which can provide theoretical support for the control and design of urban intersections..
The Research of Pedestrian Overtaking Model in Urban Rail Channel
Authors: Fan Yu Shang , Yin Xiang Yong , Yang Rui
Published: March 2015

During walking, there exist many passageways that make pedestrian flow cross or walk in the other line, resulting in a mixture of pedestrian flow feature in pedestrian area and affecting the pedestrian travel time, traffic capacity and service levels of interwoven region. To solve this problem, this paper establishes the model of pedestrians beyond of basing on the social force model which is on the basis of the traditional model. With the aid of MATAB software, though the comparison of pedestrian passing time in urban rail channel, we verified the improved model in this paper is superior to the previous model and more realistic.
The Research of Ponded Water Road Traffic Emergency Management Based on Internet of Things
Authors: Wang Li Xun , Chen Zhi Hong , Sui Li Ying , Li Wei
Published: March 2015

This paper presents studies on the theories aimed at using the technologies of Internet of Things in the domain of the emergency management of ponded water on road surface. It first introduces an emergency management model based on the Internet of Things to solve the problem of ponded water on road surface. It discusses a few critical technologies related to this model including monitoring the condition of the ponded water on road surface and the condition of the traffic simultaneously, the framework of data interfacing using multiple sources including the heterogeneous data, the analysis of traffic jam spreading pattern at critical locations of ponded water, comprehensive information analysis, and comprehensive demonstrations of monitoring based on GIS. In the end it gives our expectation about the future and development direction of using the technologies of Internet of Things in city traffic emergency management.
Study on the E-Commerce Logistics Distribution Modes of Fresh Agricultural Products
Authors: Sun Jie , Wang Xin
Published: March 2015

The logistics distribution modes have always been the bottleneck factors that restrict the development of fresh agricultural products’ e-commerce. Based on the studying of traditional logistics distribution modes, this paper points out five problems of how to create the e-commerce logistics distribution system. This thesis analyses the e-commerce logistics distribution modes of fresh agricultural products and the business process; summarizes the advantages and problems of the e-commerce logistics distribution of fresh agricultural products; finally, puts forward reasonable suggestions for fresh agricultural products e-commerce logistics distribution mode.
The Research on Transportation Modes Combinatorial Optimization Model in Multimodal Transportation System
Authors: Ji Shou Wen , Sun Kai Di , Lv Kai
Published: March 2015

This papers focus on the transportation optimal model and algorithm in the multimodal transportation. According to the network characteristic of multimodal transportation system, the transportation modes combinatorial optimization model is designed. Considering the complexity of multimodal transportation, Genetic Algorithm (GA) is used as the efficient tool to solve the optimization problem. At last we use an example to verify the feasibility of the model.
Three Dimensional Offline Packing Optimization Problem Based on Genetic Simulated Annealing Algorithm
Authors: Wang Zhan Zhong , Fu Jing , Liu Lan Fang , Liu Rui Rui
Published: March 2015

In this paper, we try to solve 3D offline packing optimization problem by combining two methods-genetic algorithm’ global performance and simulated annealing algorithm’ local performance. Given Heuristic rules in loading conditions, we use the optimal preservation strategy and the roulette wheel method to choose selection operator, integrating simulated annealing algorithm into genetic algorithm , and achieving code programming and algorithms by Matlab.This paper carries out an actual loading in a vehicle company in Changchun City, then makes a contrast between the final optimization results and each suppliers’ current packing data.The experimental results show that the algorithm has a certain validity and practicability in multiple container packing problem.
Transportation Decision and Logistics Cost Analysis Based on Risk Sharing of Enterprises
Authors: Lv Pin , Ma Cheng Zheng
Published: March 2015

Based on enterprises’ risk sharing strategy, transportation decisions such as the mode of transportation, transport volume and frequency are analyzed in this paper with a single supplier and multiple retailers as a whole research object. The effect of transportation decision on transportation cost is quantified, and a logistics cost model is established based on the comprehensive consideration of transportation cost and inventory cost. The logistics cost under risk sharing mode is calculated by using a numerical example of different kinds of products and is compared with the logistics cost under traditional mode, which provides a basis for effective logistics cost control.
Resampling Methods for Solving Class Imbalance Problem in Traffic Incident Detection
Authors: Li Miao Hua , Chen Shu Yan
Published: March 2015

Traffic data is highly skewed with rare traffic incidents in the real word while most of the existing automatic incident detection (AID) algorithms suffer from limitations due to their inability to detect incidents under imbalanced traffic data condition. This paper developed feasible AID algorithms based on resampling methods to process imbalanced traffic data. In order to obtain the optimal sampling method for incident detection, we compare the detection performance of different AID algorithms based on various resampling methods. The detection performance is evaluated by the common criteria including classification rate, detection rate, false alarm rate, mean time to detection and an integrated performance index. The I-880 dataset is finally used in experiments to verify the proposed algorithms. The experimental results indicate that the proposed AID algorithm based on resampling can achieve better performance through handling imbalanced traffic data problem. Moreover, the under-sampling is competitive than over-sampling for traffic incident detection.
Study of Steering Wheel Movement under Fatigue Driving and Drunk Driving Based on Sample Entropy
Authors: Li Zhen Long , Jin Xue , Wang Bao Ju , Zhao Xiao Hua
Published: March 2015

In order to distinguish the fatigue, drunk and normal driving effectively, sample entropy is introduced in this paper. An experiment was designed based on a driving simulator. 13 drivers were recruited to participate in the experiment. The steering wheel movement data in fatigue, drunk and normal state were collected. Sample entropy was used to analyze the characteristic of steering wheel movement under different radius curves in three driving states. The results show that the sample entropy in normal state is higher than that in fatigue state, while it is lower than that in drunk state. This indicates that sample entropy is feasible for distinguishing fatigue, drunk and normal driving.
Research on the Correlation between Typical National Urbanization Development and Transportation and its Enlightenment to China
Authors: Li Yan Hong , Wang Xian Guang , Sun Xiao Nian
Published: March 2015

To promote the new urbanization development, this paper utilizes the coordination theory and transport economic theory to select some typical countries, including United States, Japan, Britain, and South Korea, to analyze the correlation between their urbanization development stage and the evolution of their main transportation modes; on the other hand, it studies the mutual support between the urbanization development and the spatial variation of transport network. The above results are then used to make a comparison with the actual situation of China urbanization development. Therefore, this paper presents some new ideas for the transportation development in China’s urbanization process from two aspects, the development stage and the development focus, aiming to guide a healthy urbanization and achieve the sustainable development.
A Strategy on Ecological Design of High-Rise Building under Cold Climate Conditions in Lanzhou City
Authors: Bi Xiao Li , Qian Chen
Published: March 2015

It is an inevitable choice that intensive development of cities is popular in Chinese urbanization procession, so ecological design of building is trend in modern high-rise building design. This article is concerned with analyzing characteristics and environment of the high-rise building in Lanzhou , understanding ecological design of high-rise building environment problems in Lanzhou, and puts forward a strategy on ecological design of high-rise building under cold climate conditions in Lanzhou.
Distribution and Characteristics of Industrial Architectural Heritage in Songyuan City
Authors: Mo Wei , Li Zong Lin
Published: March 2015

Research on the existing industrial architectural heritages in Songyuan,sums up its characteristics in Sonyuan city distribution, describes the basic features of Songyuan City industrial architectural heritage in terms of building types, features, impact, etc, and provide basis for the study of strategies for conservation and utilization of industrial heritage in Songyuan City.
The Changing of Passenger Flow Volume and Distribution of Sharing when High Speed Railway Speed Reducing
Authors: Wang Ying , Han Bao Ming , Zheng Bin
Published: March 2015

Reduction of high speed railway speed has an influence on not only high speed railway passenger flow but also passenger flow of the public transport system within the scope of relevant transportation corridor. Calculate method of percentage of passenger transport with a variety of public transport mode using Logit model is presented. And analysis of Wuhan Guangzhou high speed railway passenger flow changes before and after reducing speed is introduced. Modify Logit model making it can be applied to the passenger flow partaking rates to meet the changing trend of passenger flow. Bring in new ideas of using Logit to calculate the distribution rate of passenger flow and provide reliable and effective solutions. To provide reference for a more scientific way of express passenger flow partaking rates for development of passenger flow law and analyzing of China's current influence factors.
The Quality of Central Squares in Small Towns of Ostrava Agglomeration
Authors: Vašíček Ondřej , Budina Martin , Nehudek Tomáš
Published: March 2015

Quality of public spaces, especially quality of central squares, has recently been a hot topic among experts as well as the general public. The submitted article focuses on the analysis of the central squares of small towns around the regional capital city Ostrava. These towns are part of the Ostrava agglomeration. Evaluated squares are alike for their location and historical development, on the other hand, their current usage is often different. The subjects of the research are mainly those factors and aspects that affect the quality of the central square of aesthetic, architectural and techno-economic. These factors are for each square separately analyzed and evaluated. The aim of the analysis is to determine how selected cities approach their most important public space, to the central square.
A Study of Restoration Performance Evaluation: A Case Study of Taiwan Street Historic Area, Zhangzhou Fujian
Authors: Yu Xiao Jian
Published: March 2015

This research will reference TBP and Landscape performance method together, use the problem-seeking method and quantitative methods, to examine the restoration performance in environment, economy and society aspect of a project in Taiwan Street Area. The results show the social benefit is higher than others. We expect the study is drawing people’s attention to the relationships among the three categories of benefits, so that future policies and preservation development will enhance compatible benefits, reduce compatible benefits, reduce conflicts, and contribute toward sustainability.
Analysis of Qingdao Eco Cities Research and Evaluation Based on AHP
Authors: Ge Yu Jie , Liu Xue Li , Xie Yi Bing
Published: March 2015

The city of Qingdao as an important coastal city in Shandong Province, in the 2006-2020 city plan clearly proposed to build an ecological city goals. This paper uses the optimization evaluation index system by AHP, landscape evaluation method for the construction of ecological city of Qingdao City, the evaluation results show that: the current level of ecological city construction in Qingdao City, eco city construction has a long way to go.
Comparative Analysis of Development Level of New-Type Urbanization & Traditional Urbanization in Shandong Province
Authors: Shan Bao Yan , Wang Li’e
Published: March 2015

In order to analyze the difference of the level of new-type and traditional urbanization of Shandong province, 20 indexes were selected involving economic, society and environment, etc, and principal component analysis was applied to calculate the score of the new-type urbanization levels of the 108 cities in Shandong in 2008 and 2013, and GIS was applied to analyze the spatial distribution of the levels. The results show that the cities whose new-type urbanization level is higher than that of traditional urbanization are located at the east of Shandong peninsula urban agglomeration, and the cities whose new-type urbanization level is lower than that of traditional urbanization are located at the north-west and south-west of the province in both 2008 and 2012.
Sustainable Housing Construction of New Rural Construction Based on Qinhuangdao Area
Authors: Ji Ling Feng , Li Peng Fei , Zhao Li , Liu Ji Sheng , Wang Yan
Published: March 2015

Combining with the national development direction of the new rural construction and taking a residential energy conservation design of a district in Qinhuangdao as an example, the energy conservation design of building envelope and the energy consumption index were quantified. In accordance with the requirements of energy consumption by 65% in the building energy conservation design standard, the feasibility of the scheme and the sustainability of residential development were demonstrated for the reference of similar building engineering designs.
Numerical Simulation and Analysis of Energy Saving Operation of Chillers in an Air Conditioning System
Authors: Sun Xiao Yu , Li Rui
Published: March 2015

The chiller’s operating energy consumption accounts for large proportion in energy consumption of air conditioning system. There are kinds of strategies can be used in the multiple chillers system. When running according to the load control of the chiller, different starting point and operating condition will affect the total energy consumption. Different operating conditions are put forward for a building chilled water system. According to simulate and analysis different operating condition, the optimum operation condition is concluded.