bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Bioretention Cell Design Elements Based on Fourier Amplitude Sensitivity Test (FAST)
Authors: Wang Hong Wu , Mao Yun Feng , Gao Yuan , Fan Jin Hong , Zhang Shan Fa , Ma Lu Ming
Published: September 2013

Sensitivity analysis of bioretention cell design elements can provide a theoretical basis for the design and construction of a bioretention cell. This study uses the storm management model (SWMM) and the bioretention infiltration RECARGA to generate runoff and outflow time series for calculation of hydrologic performance metrics. The hydrologic performance metrics include: the overflow ratio, groundwater recharge ratio, ponding time and underdrain flow ratio. The FAST method is chose to analyze sensitivity of design elements for two types of bioretention cell, one without underdrain and the other with underdrain. The results show that the surface area is the most sensitivity to most the hydrologic metrics for both types of bioretention, while the planting soil depth and the gravel depth are the two least sensitive elements. The saturated infiltration rates of planting soil and native soil are another two sensitive elements for bioretention cells without underdrain, but the saturated infiltration rate of planting soil and underdrain size are another two sensitive design elements for bioretention cells with underdrain.Keywords: Global sensitivity analysis; bioretention cell; design elements; FAST
The Storm Deposits Sedimentary Formation in Upper Ganchaigou Group of Youshashan Oilfield in Qaidam Basin
Authors: Tang Rui , He You Bin , Tang Jun , Hou Yong , Zhang Yu , Liao Chun , Wei Jin Lan
Published: September 2013

Base on the observation on the core of the Upper Ganchaigou Group of Youshashan Oilfield in Qaidam Basin (N1) and the analysis into the sedimentary background and structure, as well as previous foundings, the Neogene Period in the River Delta can be found as a-shallow lake deposition environment. The Upper Ganchaigou group in the study area is dominated by sandstone, siltstone, clay rock and little carbonate rocks. The sedimentary structures are rich, and it mainly includes: gutter cast (pocket structure), scour surface and truncated structure, hummocky cross-bedding, lapped bedding, wave bedding and so on. By summing up the above characteristic, this area is thought to have the characteristics of storm deposits, and in accordance with the storm sedimentary sequence, a sedimentary model is established.
A Comparison Study of Trace Elements along Two Transects in Tidal Mangrove Marsh at Dongzhaigang, Hainan, China
Authors: Guo Qiao Na , Li Hai Long
Published: September 2013

The mangrove marshes are important for coastal ecosystem and play an important and irreplaceable role in the maintenance of coastal biodiversity. A mangrove transect and a bald beach transect with similar topography were selected for comparison study in Dongzhaigang National Nature Reserve, Hainan. The observation wells were installed and then the pore water sample was collected. The constant elements and trace elements of the pore water were analyzed. Based on the results, the trace elements of the two transects were discussed. It was found that the concentration of antimony and lead of mangrove marsh are higher than that of bald marsh, which most probably due to the contamination of anthropogenic activity. The method of decreasing the concentration of trace elements in mangrove marsh is proposed.
The Prediction of Thermal Conductivity of Agricultural Residues from Straw for Biomass Energy
Authors: Lu Lin , Jiang Li , Feng Qing , Wang He Ping
Published: September 2013

Agricultural residues from straw are widely used for energy and other applications. The thermal conductivity is one of the most important thermophysical properties considered when using agricultural residues, such as rice straw, in renewable energy engineering. In this paper, the thermal conductivity of rice straw was measured using a thermal probe by the transient hot wire method at selected moisture contents, temperatures and dry densities. The moisture contents of the samples ranged from 0 to 21.47 percent wet basis and the dry densities ranged from 90.7 to 136.4 kg/m3 and the temperature ranged from 0 to 170°C. Under those conditions, the thermal conductivity was measured and analyzed. Experiment results showed that the thermal conductivity increases with the increases of the density, moisture content and temperature, and the relationship among them is approximately described in a linear way. A new model to predict the thermal conductivity of agricultural residues from straw was proposed. The calculated results by the proposed model are in good agreement with the experimental data.
Soil Erosion and Preventive Measures in the 3rd Expansion Project of Xiaolongtan Power-Station
Authors: Wang Hong Yan
Published: September 2013

Based on the regional topography, engineering geology, hydrology, vegetation, soil, and soil erosion survey of Xiaolongtan power plant, this paper will analyze the area of influence according to the soil and water loss and its effects in this project, and according to the characteristics of construction projects and the local natural conditions, combined with the characteristics of soil and water loss control degree of each region and the affected, The biological measures with engineering measures together, take slag retaining engineering, drainage engineering, land consolidation engineering and plant measures for the comprehensive management.So the effect of soil erosion will be reduced to minimum level, the area of new erosion will be effectively controlled. And this will provide guarantees for the security run of the power plant, protect and improve environment quality in and around the project construction area.
Pulsed SBR Treatment of Municipal Sewage Denitrification and Experimental Research
Authors: Liu Fu Jun , Yang Fan
Published: September 2013

Pulsed SBR process is a new type of SBR operation mode proposed against the traditional SBR process with poorer denitrification effect. This experiment is carried out at laboratory of sewage treatment, Beijing University of Technology, using real sewage for study, to study denitrification efficiency of pulsed SBR in nitration add raw water - denitrification this repeated and cycled process (with the same amount of water). The experimental results show that the effluent TN is less than 2 mg/L, removal efficiency is more than 96%.Keywords: pulsed SBR; domestic sewage; denitrification; experimental study
Potential of Mixotrophic Cultivation of Chlorella sorokiniana for Biodiesel Production
Authors: Wang Jing Han , Yang Hai Zhen , Wang Feng
Published: September 2013

Biodiesel from microalgae provides a promising alternative for biofuel production. Microalgal biodiesel can be produced under three major cultivation modes, namely, photoautotrophic, heterotrophic, and mixotrophic cultivation. Studies of biodiesel production from microalgae have been reported mostly focusing on photoautotrophic cultivation, mixotrophic cultivation has rarely been researched. This paper compared the biomass productivity, lipid content, and lipid productivity ofChlorella sorokinianaunder photoautotrophic, heterotrophic, and mixotrophic cultivation. Glucose was adopted as organic carbon source at five concentrations (0.1, 0.5, 1.0, 2.0, 5.0% glucose w/v). Results displayed that microalgal growth was significantly improved in glucose supplied cultures. Synergetic effect of photoautotrophy and heterotrophy existed in mixotrophic cultivation except for 5.0% culture. Highest biomass productivity of 1.178 g·L-1·d-1and highest lipid productivity of 582 mg·L-1·d-1was observed under mixotrophic cultivation with 2.0% (w/v) glucose addition. Lipid content ofC. sorokinianawas mostly higher in stationary phase than in exponential phase. Highest lipid content of 49.37% was observed in 2.0% mixotrophic culture, followed by 47.09% in 2.0% heterotrophic culture.
Based on Low Carbon Economy under the Environment of Green Car Terminal Returned Logistics is Analysed
Authors: Lv Yun Fei
Published: September 2013

this article through to the world low carbon green car terminal return logistics operation mode comparison, analyzes the low carbon green car terminal return logistics present situation and problems and put forward a better solution for readers reference.
Development of Parallel Program of Two-Dimensional Flow-Sediment Mathematical Model for Long River Reach
Authors: Wang Jian Jun
Published: September 2013

In order to meet technical requirements for systematic regulation to long reach of the Yangtze River, parallel program to computing core part of the software is developed based on TK-2DC software, which mainly contains parallelization research on flow convection diffusion model and sediment convection diffusion model. This parallel program conducts parallel programming on the basis of MPI. The whole parallel computing part adopts peer mode and corresponding special processing is performed to solving method of equation and special points so as to obtain better parallel speedup and parallel efficiency. Parallel program has been tested by relying on channel regulation engineering related to Jingjiang reach in the middle reach of the Yangtze River. Test results shows that parallel efficiency with 8 CPU is up to 80% and parallel speedup can reach 4.98. Flow-sediment analog computing efficiency of long river reach is greatly improved.
The Green Comprehensive Evaluation of Electric Power Project
Authors: Wu Yun Na , Wan Hong Jiang , Peng Yan , Yang Yi Sheng , Yu Ru Hang
Published: September 2013

With the country goes towards to establish a environment-friendly social and economic development mode transform , power projects can not merely consider the economic benefits of the project , but more synthetically consider different factors, such as impact on nearby environment, local ecosystem and the all hydrographic net system balance, workers status in this project or the impact on culture including culture building or local people living or something are related. and the risk in them, At this time the concept of green electric power project is proposed.
Canopy Water Content Estimation for Typical Emerged Plant Community from Simulation Worldview-2 Data: A Case Study in Wild Duck Lake Wetland, Beijing
Authors: Lin Chuan , Gong Zhao Ning , Zhao Wen Ji
Published: September 2013

Quantitative estimation of vegetation water content with remote sensing technique is of great significance for vegetation physiological status and growth trend monitoring. It also provides a theoretical foundation for actual application of vegetation water content diagnosis using remote sensing images in Wild Duck Lake wetland. In this paper the NDVIs and SRs calculated from simulation WorldVeiw-2 curves can be used to model and predict canopy water content of typical emerged plant. The NDVIs and SRs involving the additional spectral bands of WorldView-2, such as the red-edge and near infrared regions of the electromagnetic spectrum, improve the prediction accuracy compared with the traditional NDVIs and SRs.
Spatial and Temporal Distribution of Inhalable Particulate Matter Pollution in Beijing City during 2007-2012
Authors: Xiong Qiu Lin , Zhao Wen Ji , Gong Zhao Ning , Zhao Wen Hui
Published: September 2013

Inhalable particles (PM10) and fine particles (PM2.5) have become the primary air pollutants in Beijing, seriously affecting visibility of the city , quality of the urban environment and the health of residents. To reflect the spatial and temporal variability condition of inhalable particles systematically in Beijing city in recent years , particulate matter of 0.3, 0.5,1.0, 3.0 and 5.0μm in heated period during 2007~2011 and non-heated period during 2007~2012 were measured in the field, statistical analysis about them was conducted . And spatial analytical method was used to study their distribution pattern. The results show that: (1) Differences of particle number concentration between heated period and non-heated period,were mainly reflected in PM0.3and PM1.0.The mean concentration of PM0.3(9.5E+07/ m3) in heated period was 2 times more of that (4.3E+07 /m3) in non-heated period. By contrast, the mean concentration of PM1.0(5.6E+06/m3) in non-heated period was 27% more than that (4.4E+06/m3) in heated period ; while concentration of other size was not very different. (2) The highest air pollution concentrations of particulate during non-heated period are in Fengtai District and Chaoyang District, which are respectively in the south and east of Beijing, followed by the city center . While the pollution in Shijingshan Dstrict in the west and Haidian District in the north was relatively lighter. (3) In heated period, the air particulate pollution of Beijing city was mainly concentrated in the east and southeast of Chaoyang District, as well as the city center and its surrounding area.
Water Environment Monitoring System Based on Data Extraction - Transmission and Processing
Authors: Gong Yi Cheng , Zhang Yong Xiang , Ding Fei , Gao Wei Chun , Wang Yi Fan
Published: September 2013

The current paper describes a water environment monitoring system, which is focused on the online monitoring techniques of groundwater detection, data process and transmission, a local experiment equipment is also developed. Besides, an integrated study, in terms of host computer of the groundwater monitoring system, programmable logic controller (PLC) control system and sensor technology is carried out. Moreover, the secondary data process of automatic detection instrumentation and display technology is integrated, as well as the visualized data platform is primarily established. The water environment monitoring system improves the standard of monitoring indicators from the surface water environment to groundwater environment. The detection interval of the system is less than 3min, and the pollution forecast scope surpasses 16 km2. A high accuracy of the forecasting and risk analysis can be obtained.
Evaluation of Site Selection for National Strategic Reserve Depots of Refined Petroleum Products
Authors: Niu Yong Jie , Mu Xin , Zhao Chun Jiang , Wang Hong Qi
Published: September 2013

Based on the primary factors that influence site selection for National Strategic Reserve Depots of Refined Petroleum Products, this paper establishes a comprehensive system of evaluation indexes. In accordance with the different tiers of the index system, this paper puts forward an evaluation model based on the multi-tier fuzzy evaluation method. Then the evaluation model is proved to be reasonable, effective and feasible via case analysis and calculation.
Hardness Test and Error Analysis of N80 Oil Casing
Authors: Feng Ding , Li Zhi Min , Zhang Hong , Shi Lei , Ma Wei , Yan Jian
Published: September 2013

N80 oil casing is important equipment in petroleum drilling, to analyze the mechanical features of the N80 casing; we used Rockwell apparatus to test the hardness of N80 casing. And we have analyzed and eliminated the errors which may affect the result of the hardness test to ensure the reliability. At the same time, it summed up the causes of errors and the methods to avoid and reduce the errors during the Rockwell hardness test, and analyzed the hardness tester load, pressure head, the structure as well as the test sample roughness, shape and other factors which influenced the measurement results.
Keywords: n80 oil casing; hardness test; error analysis
Improved Fuzzy Equilibrium Average Type Comprehensive Evaluation Method in the Application of Water Quality Evaluation
Authors: Pan Jun , Li Bo Yao , Jiang Ming Cen
Published: September 2013

In order to improve the traditional fuzzy comprehensive evaluation model of main factors, the paper used the shortage of the outstanding balance average type instead of traditional fuzzy comprehensive evaluation method in the evaluation process and takes big or small algorithm, this method to avoid maximum membership principle may cause information loss, more objective quantitative determination of water quality class. This paper Liaozhong waterfront city underground water quality testing data as the basis, an improved fuzzy comprehensive evaluation method to evaluate, the result is due to the area of iron and manganese from groundwater seriously overweight cause groundwater quality grade V. Show that the method of water quality evaluation, the result more objective and accurate.
Lime-Mediated Sewage Sludge and Gas Ash use as Metallurgy Sintering Ingredients
Authors: Hong Chen , Xing Yi , Si Yan Xiao , Wang Zhi Qiang , Yu Guang Wei , Yue Chang Sheng , Li Yang , Tian Xing Qiang , Zhao Fan , Alexeev Ana
Published: September 2013

The thermogravimetry - differential thermal analysis (TG-DTA) and theoretical analysis method of Coats-Redfern were employed to study the pyrolysis process and kinetics characteristics of mixture containing lime-mediated sewage sludge and gas ash, then sintering cup test the different proportion of mixture ball. It was found that the pyrolysis process of mixture from indoor temperature 1200°Ccould divided into 4 the weight loss stages, which brings a large number of heat and CaO, Fe2O3. Base on the results of Coats-Redfem integration method, the pyrolysis process of mixture under air atmosphere was belongs to two-class reaction. Sintering cup test show that lime-mediated sewage sludge and gas ash replacing part of the sintering ingredients is feasible.
The BIM 'Families' Based Environmental Performance Design Research
Authors: Yuan Feng , Han Li , Hu Yong Heng
Published: September 2013

As far as the core of internal data structure is concerned, the elements of Building Information Modeling (BIM) platform relate to each other as components of families, independent of their materiality, parametric dependencies, geometrical structure, or their physical connection to other elements. Considering a building as an organism, this research aims at developing an evaluation methodology for buildings, based on their environmental performance. The methodology to be established is multi-objective, uses different weights and values assigned to the parameters of the families members, and checks and balances the system characteristics in order to come up with a dynamic criteria meant for guiding in the overall design and building process. This paper establishes a solid set of methodological tools that can be used for assessing a buildings environmental performance, and develops independent researches for architectural designs, alongside incorporating the ecological thoughts and building.
Preliminary Analysis of the Hydrodynamic and Siltation Characteristics Downstream of Sheyanghe Sluice
Authors: Wang Xiang Ming , Zhang Xin Zhou , Li Ti Lai , Gao Xiang Yu
Published: September 2013

Siltation in the rivers downstream of sluices is serious in China, making the discharge capacity of rivers decrease obviously and threatening the flood control in upper rivers. Tidal wave deformation is one conclusive dynamic factor leading to siltation downstream of sluices in estuaries. Take SheYanghe estuary as an example, the hydrodynamic characteristics of tidal wave deformation and sediment characteristics change before and after the construction of sluice are analyzed.
Preparation and Properties of Wood Flour/HDPE Composites Using C5-g-MAH as Compatilizer
Authors: Cen Lan , Chen Fu Lin , Cao You Ming , Chen Hui Xue
Published: September 2013

Maleic anhydride grafted C5 petroleum resin (C5-g-MAH) was prepared using peroxide as an initiator by melt grafting process, and was incorporated as a compatibilizer into Wood Flour/High Density Polyethylene (WF/HDPE) composites. The effect of second monomers and C5-g-MAHs on the morphology and mechanical properties of composites was investigated. Results showed that the presence of a second monomer, Triallyl isocyanurate (TAI), Butyl acrylate (BA) or Trimethylol proane trimethacrylate (TMPTMA), in the grafting system gave rise to higher grafting ratio of C5-g-MAHs compared to that without a second monomer. The highest grafting ratio was obtained as TMPTMA content being 0.20~0.35wt% based on C5. The addition of C5-g-MAHs into WF/HDPE resulted in improved mechanical properties. Meanwhile the composite containing C5-g-MAH with 0.30wt% TMPTMA exhibits the most significant improvement in all mechanical properties with tensile strength and bend strength increasing up to 18% and 20% respectively, which is concomitant with the finer morphology structure observed by SEM, suggesting the remarkable compatibilizing effect of C5-g-MAH with TMPTMA for WF/HDPE composites.
The Research on Emergency Supplies Dispatching under the Circumstance of Unconventional Emergency
Authors: Chen Ye Hua , Zhang Shu , Chen Qian Qian
Published: September 2013

A three-echelon network for emergency supplies dispatching is designed according to the characteristics of emergency supplies dispatching under the unconventional emergency. This paper aims at proposing a multi-objective programming model of minimum cost as well as shortest time under the circumstance of multiple depots, multiple supply-hubs, multiple disaster places, multiple type of supplies and multiple transportation modes. It finally solves the model by integer programming algorithm and testifies the validity of the model with an example.
Research and Application of Decision Tree Technology in Retinopathy
Authors: Zeng Xu
Published: September 2013

Diabetic retinopathy decision tree mining problem, with the extension of diabetes date, diabetic retinopathy becomes the one of the most serious complications. In order to find out and treatment of diabetic retinopathy as early as possible, the paper proposes a kind of new tree-building methods. By the comparison of the common methods of decision tree analysis, base on the retinopathy data of the department of ophthalmology information management system in a hospital in Zunyi City in 2011, J48 parameter selection, and established the model after the original data are corrected, property cleared. Compared with the original data, the cross validation rate of decision tree model with corrected data is more accurate. It has got a better application in the Ophthalmology information management system in a hospital in Zunyi City.
Research on Time Management for Project Cluster Development
Authors: Zhang Jian Wei , Zhang Cheng , Ye Ren Zong , Zhong Zi Xiang
Published: September 2013

Project Cluster development usually reflects a large scale construction, the mutual connections of the project working programs, complex constitutions. This paper tries to analyses the difficulties of project clusters progress control and study some processes and methods of project cluster time management, through a series of measures of making the progress plan, schedule monitoring, adjustment and coordination in order to guarantee the project progress goals realization and internal resources coordination and ensure time management operates smoothly of a company.Keywords: Project Cluster; Method Study; Schedule Control; Resource Optimization; Time Management
Introduction to Partial Least Square: Common Criteria and Practical Considerations
Authors: Lee Ke Hwa , Che Shih Chih
Published: September 2013

In the social science research area, there are two important statistical methodologies, one is covariance-based structural equation modeling (CBSEM), and the other one is variance-based partial least square (PLS). Compared with CBSEM, PLS lacks comparatively the reference books and full applications. The main purpose of this study is to develop a paradigm to demonstrate how to assess the reliability, convergent validity, discriminant validity, and path analysis in a proposed research model by using Smart PLS. We hope this study’s result can offer some correct steps when using PLS.
Super Exponential Iteration Adaptive Minimum Entropy Blind Equalization Algorithm Based on Quantum Artificial Fish Swarm Optimization
Authors: Guo Ye Cai , Huan Wei , Wu Li Fu , Leng Ke Cheng
Published: September 2013

In order to improve equalization performance of higher-order non-constant modulus signals, adaptive minimum entropy super-exponential iteration blind equalization algorithm based on quantum artificial fish swarm optimization was proposed. The proposed algorithm can accelerate convergence rate via super-exponential iteration algorithm and decease mean square error (MSE) further via quantum artificial fish swarm algorithm. The simulation results demonstrate that the proposed algorithm has different equalization performance to the different modulation systems and can speed up convergence rate and decrease state MSE.
The Security Mechanism Research of PACS
Authors: Zeng Xu
Published: September 2013

According to the picture archiving and communication system that have not introducing of the security mechanism yet, putting forward a security mechanism plan that based on digital watermarking and digital signature technology. Digital watermarking technology could authenticate the copyright of medical image effectively, and digital signature technology could authenticate the identity of sender and receiver. The PACS that introduced digital watermarking and digital signature technology could protect the interests for both hospitals and patients effectively in arbitration time, and became an important relying on for the development of remote medical.
The Achieve Method of the Panorama Field Geological Image Web Shared
Authors: Cheng Wei , Xue Lin Fu , Li Wen Qing
Published: September 2013

Field geological outcrops play a crucial role in the field geological observation. They can reflect the regional stratigraphic occurrence, lithology, structure and other information. The traditional field geological outcrops can hardly descript and real fully reflect the actual situation of the field geological. This paper puts forward to use the WEB2.0 Flex rich client technology, combine with the panoramic imaging technology to create panoramic field geological image web shared system program to solve the problem of the outcrop information sharing problems. Xingcheng practice base of Jilin University is using this system for teaching and research.
Properties and Application of Semi-Flexible Material in Highway Engineering
Authors: Zhang Ming Cheng , Xu Xi Juan
Published: September 2013

This paper studies the Marshall stability, splitting strength and compressive strength testsof the semi-flexible mixture at first, several steps which should be taken to achieve the optimal mixproportion are presented as below: optimal gradation, optimal fluid content, optimal asphalt content,optimal cement content. Secondly introduces systematically the performance, proportioning designand construction process of semi-flexible mixture. Finally as a structural layer can be a goodsolution to the problem of reflecting crack phenomenon of asphalt pavements, aiming at providingreference to its extension and application.
Influence of Heat Treatment on Corrosive Property of 5083 Aluminum Alloy
Authors: Li Chun Hong , Li Chun Mei , Chen Deng Ming
Published: September 2013

The microstructure and intergranular corrosion phenomenon were investigated by means of optical imaging,SEM and EDS. Hardness was conducted and electrochemical corrosion properties were researched in 3.5% Nacl solution by electrochemical tester.The result showed, there was no intergranular corrosion phenomenon when the samples underwent cold rolling and stabilization heat treatment;The intergranular corrosion was obviously when the samples were annealed at 180°C for 90h or 150h;The corrosion potential of TO1 state annealed at 180°C for 90h and TO2 state annealed at 180°C for 150h was lower than cold rolled and stabilization heat treatment samples，they were more susceptible to electrochemical corrosion.
Study on Gradation Fractal Cartesian Coordinate System of Asphalt Mixture
Authors: Li Lin Ping , Zhang Fei , Yu Jiang , Zhang Fan
Published: September 2013

In order to explore intrinsic relation of continuous, interlocked-dense and gap gradation, this paper studied them by fractal regression analysis, by which a gradation distribution Cartesian coordinate system was established and slope of the gradation was proposed at the same time. In addition, this study adopted gradation fractal Cartesian coordinate system to analysis the internal relations of continuous, interlocked-dense and gap gradation, at the same time verified and analyzed the correlation between the slope of the gradation and asphalt mixture gradation by using reference experimental data. The results show that: the gradation range given by specification can be approximated by a line segment, and the slope of the line can quantitatively reflect the relative thickness of coarse and fine aggregate of asphalt mixture; the gradation range given by specification possess a small proportion in the gradation fractal Cartesian coordinate system, which can be further optimized, and interlocked-dense asphalt mixture is a transitional form of continuous gradation and gap one; for the SAC asphalt mixture gradation, gradation slope has correlation with the formation of gradation skeleton; the Suitable fractal evaluation model for continuous, gap and interlocked-dense gradation was proposed finally. Thereby, the gradation fractal Cartesian coordinate system can not only reflect the relation of continuous, interlocked-dense and gap gradation, but also make it possible that the gradation distribution range in the specification can be expressed in function.
The Reinforcement Research on Assemble Steel Truss Bridge
Authors: Zhang Yu Chao , Wan Xu Sheng , Zhang Long
Published: September 2013

The article uses a original prefabricated steel bridge as example,briefly introduces the truss element calculation theory. Selecting different reinforcement, modeling of the reinforcement with the Midas / Civil program, emphatically analyze the stress and deflection of the full-bridge under each reinforcement, then comparison the results with the allowable value ,finally select a best reinforcement program,provides reinforcement and repair practical reference for fabricated steel truss bridge.
Study on the Technology of Synthesis Dimethyl Ether with Bi-Function Catalyst by Phophorus Modified
Authors: Yin Yuan , Chen Liang , Zhang Shi Ling , Yan Ya Meng , Li Yang
Published: September 2013

The factor and technology of synthsis dimethyl ether by one step method were studied in slurry reactor with bi-function catalyst by phophorus modified (C301/ P-γ-Al2O3) and liquid paraffin. The results showed that the temperature, pressure, space velocity of reaction system and CO2content in the syngas have a greater influenced to synthsis dimethyl ether. The CO conversion per pass reached 93% and DME selective was more than 60% at 150mL liquid paraffin catalyst for solvent quality of 7.3%, H2(mol) to CO (mol) of 2, 270°C, 4.3MPa, space velocity of 600mL/h·gcat. The existence of CO2in the syngas improved the produce yield of dimethyl ether.
The Research of Models for TKY Tubular Joint Welds in Ultrasonic Phased Array Inspection
Authors: Lu Ming Hui , Shao Hong Liang , Chang Jun Jie , Liu Xun Feng
Published: September 2013

In order to solve the problem of locating defects from TKY node structure weld using for marine engineering , the article present a new approach of establishing TKY’s mathematical model to replace the traditional method of Graphic analytic method, which uses the computer to carry on the drawing. Firstly three-dimensional mathematical model of the Y-shaped tube node is made, based on what it work out the equation of the cross-sectional on different position of weld by introducing the concept of intersecting angle φ, eventually it establish the two dimensional mathematical model of cross-sectional . In the end of the article, some experimental examples show the effectiveness of the models, which testify that using computer graphics to evaluate ultrasonic pulse-echo is more effective , smaller error, higher working efficiency and reduces the impact of human factors greatly.
Properties of Jute Blended Yarns Spun on Ring Spinning System
Authors: Zhang An Fen , Xia Zhao Peng
Published: September 2013

The chemical modified jute fibres were spun into jute/cotton blended yarns by using of two different blending methods (the fibre blending and the sliver blending) on ring spinning system. The tensile, hairiness, Uster evenness properties of two kinds of blended yarns with different blend ratios and yarn counts were investigated in this paper. It was found that the tensile, hairiness index, mass irregularity and imperfections of blended yarn depended on amount of jute fibres in blends. The draw frame blended yarns processed the better quality than that of intimate blended yarns.
Using Control Chart to Detect Abnormal Changes in the Permeability
Authors: Shu Ming Hung , Huang Jui Chan , Nguyen Thanh Lam , Hsu Bi Min
Published: September 2013

Water-vapour permeability is a critical factor of writing/ printing papers in most of practical applications; but how to monitor the manufacturing process to keep the key characteristic of the paper in control is still understudied. Therefore, in this paper, in order to monitor the water-vapour permeability of writing/ printing papers, MaxGWMA chart is first suggested due to its best effectiveness in terms of average run length performance and its high capability of detecting small shifts in the process mean and variability as well as identifying the source and the direction of an out-of-control signal. By using MaxGWMA chart, assignable causes of any out-of-control signal should be deeply examined so as to have proper corrective actions undertaken to either eliminate them from the process or reduce the variability induced by them to make the papers consistently manufactured under a stable process.
Effect of Beeswax on Batch Foaming of PLA
Authors: Lin Kun Chang , Chen Chia Hsun , Chen Shang Min , Sie Sian Nan
Published: September 2013

This paper presents the foaming behavior of PLA-CO2 and PLA/beeswax-CO2 systems for solid state foaming process with particular goal of producing low density foams. The low density PLA foams can be achieved under 2 MPa sub-critical CO2 condition due to CO2-induced crystalline. When 10wt% beeswax was added to PLA matrix, the tensile strain at break increases from 7.9% to 22.2% and crystallinity remain unchanged. The inherent brittle deformation behavior of the PLA was transformed into relatively ductile behavior after blending 10wt% beeswax. The expansion ratio of neat PLA and its blends with 10wt% beeswax increase from 1.08 to 19.4. The ductile deformation behavior of PLA is an important factor for solid-state PLA foam.
Electrospun La3+-Doped ZnO Nanofibers with High Photocatalytic Activity for Rhodamine B Degradation
Authors: Miao Qing Qing , Tang Ying Mao , Chen Wen Wen , Zheng Wei Wei , Qian Qing Rong , Xu Jing , Liu Xin Ping , Xiao Li Ren , Huang Bao Quan , Chen Qing Hua
Published: September 2013

Grape-like structure La3+-doped ZnO nanofibers with different doping concentrations were prepared by electrospinning-calcination technology. The resultant nanofibers were characterized by field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), photoluminescence spectrum (PL) and X-ray photoelectron spectrum (XPS) respectively. The photocatalytic activities of the nanofibers for the degradation of Rhodamine B (RhB) in aqueous solution were studied. Results show that the doping concentration of La3+ has an significant influence on the photocatalytic performance of the nanofibers, and 2 mol.% La3+ is the optimal doping concentration.
Adhesive Pressing Veneer Performance Study of Compound Sheet of Straw
Authors: Zhao Yan , Pang Jiu Yin , Gao Zhen Guo
Published: September 2013

Using veneer and Straw shavings two kinds of raw materials to manufacture composite way veneer straw composite panels, Straw is discussed when the shop is the amount of glue, Adhesive proportion factor effect the performance of the veneer, and this kind of plank makes a simple analysis of economic benefit.The results show that: SEM test proves that the API surface diffusion performance is better than that of UF adhesive. Urea-formaldehyde resin adhesive on the surface of straw respectively formed by the uneven and thick, API adhesive fillet formation is relatively uniform and relatively thin.In the production of veneer straw composite board is best craft hot-pressing temperature is 160°C, hot pressing time is 1 min /㎜, sizing amount of straw content is 12%, API adhesive formulations: Ratio of main agent PVA: SBR for 7:3, Crosslinking agent amount (P - MDI) 30% , density of not less than0.85g/cm³. The board each performance index of the optimal, fully able to meet the requirements of national standard, adopt the process sheet belongs to no aldehyde board.
Study on the Thixotropic Properties of Mastic Asphalt
Authors: Chen Jian Hua , Zou Gui Lian , Zhang Xiao Ning , Zhang Shun Xian , Nie Wen , Wan Tao Tao
Published: September 2013

The asphaltic cement and mastic asphalt are respectively carried on Brookfield rotary viscometer and Lueer tester. The results show that: the thixotropic properties of mastic asphalt lags behind the asphaltic cement; as the stirring temperature is high, the thixotropic effect of mastic asphalt is not obvious, but the construction time range is large. With high stirring speed, the thixotropic effect of mastic asphalt is obvious, but the construction time range is small. The thixotropic effects of mastic asphalt are also analyzed to provide reference for the improvement of the construction process and quality of the construction.
The Study of Dynamic Equations of ER Fluids Based on Multi-Field Coupling
Authors: Zhu Shi Sha , Yuan Wei , Qian Xue Peng , Tang Tao
Published: September 2013

Based on the multi-field coupling effect and the theory of electrodynamics, as well as the capture effect of the ER fluids flowing through the control field, by analyzing on the flow characteristics under the electric - power - thermal coupling load environment, the structure-force dynamic coupling mathematical model of ER fluids is derived under multi-field.
Model and Simulaiton of Air Spring Stiffness Characteristics Based on van der Waals Equation
Authors: Sun Li Qin , Li Zhong Xing , Shen Xu Feng , Zhao Hua Wei
Published: September 2013

Air spring gas is generally regarded as an ideal gas in analysis , but this is not consistent with the actual work . Considerring influence of non-ideal gas to air spring stiffness ,and based on van der Waals equation which is closed to the real gas equation, stiffness characteristics model of air spring and air spring with auxiliary chamber are re-derived and established. Influence of non ideal gas correction factor H to air spring stiffness is analysed within the range of pressure 0.2MPa to 5 MPa and working temperature -50 °C to 50°C,and results show that , there are big errors in air spring stiffness model in the conditon of low temperature and high pressure based on ideal gas equation, and range of application of the stiffness model is expanded when H is introduced and amended.
Preparation and Photocatalytic Properties of Bi2WO6 with Different Morphologies
Authors: Chen Ying , Wang Xu , Song Hua , Song Hua Lin
Published: September 2013

Bismuth tungstate (Bi2WO6) microcrystalline with different surfactant were successfully prepared by a facile hydrothermal route.The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and BrunauerEmmettTeller surface area (BTE) in detail. The photocatalytic activity of the samples was also evaluated using the degradation of Rh B at room temperature under visible light irradiation. It was found that the surfactant played important roles in the formation process of controlling the morphology and structure of the catalyst and also had a great influence on the catalytic activity. SDS and CTAB effectively improved the catalytic activity and PVP was good at controlling morphologies.
Theoretical and Experimental Study on Trans-Scale Properties of Soil Strength
Authors: Fang Ying Guang , Feng De Luan , Gu Ren Guo , He Zhi Wei
Published: September 2013

According to the size and connecting characters of soil particles, soil is discomposed into two components as matrix and reinforcement particles respectively with a demarcation size fixed at 0.075mm to investigate the influence of the microstructures on soil strength. Based on the strain gradient theory, a multi-scale matrix-reinforcement particle model was established to study the trans-scale properties of soil strength which indicates that the soil strength is related to the intrinsic length scale, the strain gradient, the matrix properties and the gradation and size of reinforcement particles. A series of consolidated and undrained compression tests of unsaturated remoulded soil were designed to study the trans-scale properties of soil strength. The results showed that: the yield stress of soil increased as the reinforcement particle size decreased, displaying the trans-scale properties of soil strength. The research result is significant to the development of strength theory of soil.
Proprieties of Plain-Weave Fabrics Produced with Twistless Cotton Yarns Made by Reverse Twist Process
Authors: Zhang An Fen , Xia Zhao Peng
Published: September 2013

Properties, viz. mechanical performances, air permeability, water vapour diffusion, and wicking height of absorbed water in fabrics above level of water, of plain-weave fabrics woven by twistless yarns and equivalent conventional ring spun yarns have been investigated in this paper. The experimental twistless yarns were made by reverse twisting process which spun the yarns on the ring frame and removed the twist of said yarns by reverse twist process. The results show that a fabric produced by yarns which have twists are considerably stronger than the twistless fabric in both breaking strength and tearing strength, air permeability of the twistless fabric is approximately 23.74% lower than its corresponding fabric made by conventional ring spun yarns. However, compared to the fabric made by conventional ring spun yarns, twistless fabric fares well in water vapour diffusion and wickability.
Temperature Field Numerical Simulation of Screwy Thin-Walled Part Cladded by Hollow Laser Beam
Authors: Lin Hao , Shi Shi Hong
Published: September 2013

A numerical simulation model of laser cladding based on internal powder feeding through a hollow laser beam is set up by the Ansys Parametric Design Language (APDL). Through analyzing this model, the saddle-shaped distribution of energy absorbed in scanning direction is found and the molten pool temperature field of single laser cladding is observed like a comet[. Base on the single laser cladding experiments, the initial parameters and test plans of laser cladding and the screwy thin-walled part forming are confirmed. The finite element model of laser cladding forming screwy thin-walled part is established. The evolution of temperature field and thermal cycle of the nodes are studied during the screwy thin-walled part forming process. In the emulation laser power is controlled real time according to the analyses above, and the changing value of laser power is obtained to keep the molten pool temperature steady. The screwy thin-walled part is formed successfully based on these data.
Soil Elastic-Plastic Rotation Gradient Theory Based on Grain Size Factor and its Finite Element Implementation
Authors: Fang Ying Guang , Liu Jia , Dong Zhi Liang
Published: September 2013

Soil is the most common discontinuous granular material in the geotechnical engineering and its physical and mechanical properties have obvious grain size effect. In view of the insufficient of classical continuum mechanics and existing discrete mechanics, the matrix-reinforcing particles cell element model of soil introduces to account for the grain size effect and microstructure of the soil; then, based on the rotation gradient theory, the elastic-plastic stress-strain relations of soil with grain size factor obtains; finally, using the principle of virtual work establishes the corresponding finite element method.
Research on Influence Factors and Formulae for the Bearing Capacity of Angle Shear Connectors
Authors: Zhang Zhi Hui , Li Shi An , Ji Tong Geng , Dang Dong
Published: September 2013

Relying on a practical application in pre-stressed concrete box-girder with corrugated steel web, four angle shear connector specimens are made and experimented in push-out test. The results show that: in the ultimate load level, failure model appears after large slip occurring between connector and concrete which shows a good ductility of angle shear connector. The main influence factors for the bearing capacity of connector is thickness of angle web, U-shaped steel provides certain shear resistance ability to same extent. Finally, through the contrast analysis between measured values and theoretical values, a new bearing capacity formula is proposed. Compared with the recommended formulae, the calculated results from proposed formula is most close to the text results, thus new formula can be used for security design and calculation.
Simulative Dynamic Performance Analysis of Submarine Diesel Exhaust Deballasting System
Authors: Zhang Ke Long , Ma Shi Hu , Lao Xing Sheng
Published: September 2013

One dimensional dynamic performance model of submarine diesel exhaust deballasting system is developed. Cross section of outer shell of ballast tank is described as cylinder, one dimensional flow equations combined with webie combustion model and woschni heat transfer model are employed to describe diesels flow characteristic. Coupled effect between gas pressure in ballast tank and discharging performance of diesel is considered in the presenting model. Deballasting duration for one certain submarine model is calculated using the developed model, and the result agrees well with that obtained by using Chinese state code for submarine low pressure system design. For different cross section tank models as circular section model, parabolic section model and trapezoidal section model, dynamic performance of diesel exhaust deballasting system is studied using the validated model. Gas pressure in tank, dropping speed of tank water surface and draft of submarine are simulated, and the results show that little difference of deballasting duration is caused by changing tank cross section. The most stable deballasting process is achieved by using a circular section tank. Deballsting performance is also studied as tonnage of submarine and volume of ballast tank change and commonsense conclusions are obtained.
Investigating Impact of Speed on Traffic Safety
using Collision Prediction Model
Authors: Tian Zhun
Published: September 2013

Motor vehicle speed is a risk factor contributing to many road accidents which result in significant social and economic costs. Although a review of previous research shows that the literature is extensive on the impact of speed on traffic safety, the majority of previous researches mainly focused on rural roads while rarely on urban roads. It is crucial that the relationship between speed and road collisions should be investigated in urban areas because of the fact that a high ratio of collisions is occurred on urban roads. The objective of this study is to examine the influence of motor vehicle speed on road collisions on urban road sections. This objective is achieved by developing collision prediction models which quantitatively correlate collision frequency to speed characteristics. It is found that both mean speed and speed standard deviation are positively related to collision frequency. Both of them are risk factors in traffic safety.
Ship Electric Propulsion Simulation System Based on MATLAB
Authors: Qu Xiao , Zheng Wei Gang
Published: September 2013

The paper has an analysis of ship electrical propulsion technology. The Paper have a detail research of IPS (Integrate Propulsion System) . A mathematics model in the form of differential equation was constructed base on the theory of motor timing. Then the model was changed into the form of transfer function. With the help of MATLAB, the model in the form of transfer function can be easily solved.