bluuebunny/crossref_metadata_2025 huggingface dataset:
The Study of Three Capture Agents with High Efficiency for Hydrogen Sulfide
Authors: Wang Shou Zhong , Qin Jian Zhao , Chen Yao Qing , Zhang Tong , Yang Zhi Feng , Dong Chun Hong , Pu Ting , Wang Li Xiao
Published: March 2013

A rapid removal method of hydrogen sulfide (H2S) gas is studied in the present paper at ambient conditions. These capture agents are powers of grain sizes and convenient for injection on H2S gas at the site of accident. The agents are characterized by SEM and N2 adsorption-desorption method, etc. The test on capturing H2S was experimented and the result indicated that the prepared agents can reduce the H2S concentration in the air to a harmless level rapidly.
Dilemma and Countermeasures of County Governance in the Context of the Environmental Crisis
Authors: Ai Li Juan , Wang Zi Yan , Wei Fang Mu
Published: March 2013

In recent years, with the center of the city to promote ecological construction, polluting enterprises have gradually transferred to the county, and serious environmental pollution and environmental conflicts are brought to the county. And because of county governments are in the end of the status of the urban power pyramid system, the regional environmental collaborative development mechanism remains to be further improve, the county government performance evaluation is still mainly in terms of GDP, the tenure system led to the prevalence of short-term behavior, supervision of production safety and technological transformation not in place, as well as lack of environmental accountability and effective environmental compensation mechanism and so on, the county environmental crisis happened frequently, governance falls into trouble. Therefore, in the context of the environmental crisis, effective county governance embodies fair regional collaborative development mechanism, further innovate performance evaluation and reform the existing cadres of the tenure system, strengthen supervision of production safety and technological innovation, improve environmental accountability and environmental compensation system, etc.
Offshore Oil Spill Incidents in Brazil
Authors: Maggi Patricia , Vaz Morgado Claudia Do Rosario , Nóbrega De Almeida João Carlos
Published: March 2013

Brazil has performed an important role in the oil and gas industry mainly because its offshore E&P activities. The volume of oil produced in offshore fields had increased 88% in the last decade. Although the offshore exploration had begun in the 70’s of the last year, only in the year 2000 was promulgated a law enforcing the companies to notify any accidental release to the environment. Besides the Brazilian Navy and the National Petroleum Agency, the Brazilian Federal Environmental Agency - IBAMA is entitled to receive these notifications. Although IBAMA receives the oil spill communications since 2001, only in 2010 the Agency began to include this information in a database. This paper discusses the offshore oil spill data received between 2010 and 2011.
Characterization of Antibiotic Resistance E. Coli and Antibiotic Resistance Genes in Aquatic Environment of Taihu Lake, China
Authors: Han Ni Ni , Zhang Song He , Wang Pei Fang , Wang Chao
Published: March 2013

The aims of this study are to evaluate multiple antibiotic resistant Escherichia coli isolated from surface water and to investigate the presence and distribution antibiotic resistance genes (ARGs) in sediments of Taihu Lake. The results show that the presentence of four ARGs concentrations in the sediments of the lake was in sequence: strB>qnrB>strA>qnrS, as determined by realtime-PCR technique. The southwest and east areas of Taihu Lake were polluted seriously than other areas from all kinds of antibiotics. The screening Escherichia coli had a higher resistance to streptomycin, tetracycline and ampicillin than other four antibiotics, and had a lowest resistance to levofloxacin.
Ecological Civilization and Sustainable Rural Development
Authors: Zhang Nan Nan , Sun Hong Rui , Li Yue
Published: March 2013

The paper firstly gives an analysis of the definition of ecological civilization and ecological civilization orientation for rural development. Then based on the view of ecological civilization and that of sustainable development, the paper points out that rural sustainable development is an important subject, as well as raises the strategies of rural sustainable development lead by ecological civilization, involving the construction of ecological countryside from the angle of environmental protection and infrastructure, from the angle of science and technology innovation, from the angle of structural reform, and from the angle of enhancing the farmers quality.
Influence of Subtilisin on Mussel (Mytilus edulis) Byssus Deposition and Diatom (Navicula sp.) Settlement
Authors: Duan Dong Xia , Lin Cong Guo , Liu Guang Zhou
Published: March 2013

Biofouling organisms secrete adhesive polymers to settle themselves on man-made substrata in the marine environment. Mussels (Mytilus edulis) and diatom (Navicula sp.) are both major marine biofoulers. They attach tenaciously to a wide variety of submerged surfaces by virtue of byssus and extracellular polymer substances, respectively. The aim of this study is to evaluate the antifouling potential of the serine protease subtilisin on mussels and benthic diatoms. The effects of enzyme concentration, treatment duration and application time were tested on byssus deposition. The results showed that subtilisin effectively prevented the byssus formation. The reduction rate of byssal plaques was dependent on enzyme concentration and treatment duration. The byssal plaques of Mytilus edulis became progressively less sensitive to hydrolysis as they cured. Attached diatoms on polystyrene substrate were effectively removed by subtilisin.
A Study on the Physical Environment Assessment Tool for the Performance of Leisure Agricultural
Authors: Hung Fei Shuo , Tuan Tsung Yuan
Published: March 2013

The goal of this study is to achieve sustainability environment. According to our previous study in the nine Indicators of Taiwanese Green Building, and the Canada GBTools evaluation, combined with Taiwan’s leisure farms, we simulate evaluation factors of sustainability for the practical environments in Taiwan’s leisure farms. We then classify the evaluation factors according to its tendencies and create an expertise questionnaire using these tendencies. Through the results of the expertise questionnaires, we understood how much the experts valued ecology, energy, resource, society, and economy. We then further analyze the cause of the varying degree of attention paid to each category according to its attributes . SPSS statistic software is used as the analytic tool. Through factor analysis and the deletion of factor loading, this study attained four kinds and nine evaluations as well as 29 evaluations points: "perfect environment", "resources management ", "energy efficiency management". In addition, "complete plans and evaluations", "environment workload", "environment plans", the conclusion is that the most valued points for the business are: "environment plans", "environment workload", "perfect environment". However, the most valued points for the government are: "perfect environment", "resources management ", water resources and green materials. As for scholars, the most valued points are: "perfect environment", "environment workload", "using local renewable materials" as well as "environment plans". Analysis of Variance, the conclusion is that the most valued points for the government and scholars are: "natural sounding usage", "legality of base selection", "effectiveness in pollution process", "light efficiency control management systems", "simplified interior design". Finally, LSD analysis attained five evaluation points: "natural sounding usage", "legality of base selection", "effectiveness in pollution process", "light efficiency control management systems", "simplified interior design". The result of this study shows that implementations would be much easier if the necessary equipments and space were put into consideration during the planning stage of recreational farms. Lastly, this study suggests leisure farms choose their operating method carefully. The operating method should meet the nature of leisure agriculture; it should also consider utilizing the sustainable development assessment indicators and relevant decorations in the future. If a correct operating method is chosen, it will facilitate an environmentally friendly leisure farm.
Research on the Consequence Assessment System of Natural Gas Pipeline Leakage Accidents
Authors: Wang Chao Qun , Chai Jian She , Niu Wei Wei
Published: March 2013

With the rapid oil and gas industry development, the city gas pipeline has become a necessary infrastructure of the modern city. The Pipe leakage emergency rescue often involving multiple people and departments at all levels, also a large number of geographical space data for piping around. The Geographic Information System (GIS) has many advantages that it can conduct spatial data management, data visualization, analysis, simulation, and integrating with other systems. The main study line is simulating the gas diffusion, firing and exposing, once leaking, researching to the establishment of accident prevention, reducing damage caused by an accident emergency rescue system of city natural gas pipeline. The system can make a visual show of the assessment area of accident consequence with different grades through inputting physical and chemical parameters of natural gas, initial state of gas leakage and weather conditions.
The Study of Indicator Framework of Cleaner Production in the Tertiary Industry
Authors: Zhu Guo Wei , Xiao Yun Ya , Wan Chencheng
Published: March 2013

This paper gives the contents of the Cleaner Production of the pilot units(scene, hotel, campus) by combining the developing status in the tertiary industry, and through deep theory probing, concludes the indicator framework in this field and shows the reference for the sustainable development in the tertiary industry in China.And the framework concerns such aspects as environmental quality(water,air,noise) and other indicaotrs respectively. It ranges the Cleaner Production level of the tertiary industry into six status like The best , Very good, ordinary, somewhat, danger, and the worst.
Study on the External Cost of Highway Congestion: Estimation Method and Application
Authors: Li Yang , Chu Chun Chao , Chen Jian Ying
Published: March 2013

The losses incurred by traffic congestion are an important part of the external costs of highway transportation. In this paper, traffic congestion index was proposed to estimate external costs of highway congestion. On basis of analyzing the composition and type of the external costs of traffic congestion, estimation methods about each type external costs were presented. By virtue of presented traffic congestion index and estimation methods, an application case was conducted on external time costs estimation about 2010 annual Beijing expressway congestion. Finally, some strategies to improve highway congestion were proposed according to the calculation results, which provided a reference for promoting the sustainable development of road transportation.
Research on Evaluation of Low Carbon Industrial Transfer Park Based on Extension Model
Authors: Fan Jia Feng , Xu Hao , Zhu Bang Zhu , Yuan Juan
Published: March 2013

An index system of low-carbon Industrial Transfer Park has been constructed form six aspects, which are planning, management, infrastructure, industry ecosystem, human life and carbon sinks. The park is evaluated by using the analytic hierarchy process and the extension method. The evaluation model is more comprehensive and objective than others to assess the degree of carbon emissions of the industrial park.
The Construction and Evolution of Eco-City’s Four-Dimensional Model
Authors: Wen Zong Chuan , Li Hen An
Published: March 2013

As an ideal place of residence, eco-city makes a very important role in human life. The residents' production and life and eco-city’s construction and development are closely linked. Research on the main parts and their functions of an eco-city system is very essential to the study of eco-city. In this paper, we propose a four-dimensional model of eco-city that includes non-governmental organizations, government, business and residents. Based on this model, we analyze the importance and functions of the four main parts, and describe the evolution of the model in eco-city’s every stage of development.
Analysis of Extreme Temperature Events in North China Based on EMD Method
Authors: Chen Xiao Ying , Zhu Yi Min , Xia Lin Lin , Zhang Wei Xing
Published: March 2013

The spatio-temporal variations of extreme temperature in North China during 1954-2008 are analyzed based on Empirical Mode Decomposition (EMD) method. The results show that the interannual-to-interdecadal variabilities of extreme temperature in North China. 3-4 years and 7-8 years interannual variabilities as well as a decreasing trend are dominant while 15 years oscillation takes second place in the extreme low temperature variation. Meanwhile, 3-4 year interannual variabilities are dominant while 6-7 years, 14-15 years 40 years oscillation as well as an increasing trend takes second place in the extreme high temperature variation. 3-4 years interannual variabilities of both extreme low and high temperature are closely related to El Nino-Southern Oscillation (ENSO), while interdecadal variabilities and trend of extreme temperature are obviously associated with the Pacific Decadal Oscillation (PDO). Besides, PDO plays an important role on interdecadal modulation of interannual to decadal variabilities of extreme temperature in North China.
Automatic Monitoring and Warning System of Landslide and its Application
Authors: Liu Yao Feng , Wang Zhi Liang , Zheng Xue Feng , Su Hao Ru
Published: March 2013

The purpose of this study is to establish a kind of geological disaster monitoring system,The system proposed in this paper has a good scalability and unified data interface in which change monitoring parameters can be changed according to the different types of disasters conveniently.The system can be widely used in monitoring of debris flow, landslide, collapse, mine tailings and other disaster.The electricity of the system is supplied by solar energy ,and it uses the wireless network through the GPRS remote communication. It can realize the remote automation monitoring of disaster and the system has been widely used in the landslide demonstrational site.
One Environmental Monitoring early-Warning System Research by RIA Technology
Authors: Yuan Hong , Zhong Hong Mei , Lai De Jun
Published: March 2013

The paper discusses the environmental monitoring methods and the existing problems, and then pointed out four aspects in need of improvement: environmental monitoring network needs to be improve; data analysis need to be further; environmental quality comprehensive analysis capability need to strengthen; monitoring instrument needs to be updated. And using the Internet of things technology, combined with the technology of RIA, WebGIS, in Flex Viewer open source framework, adopted the open design, discusses a suitable environment real time monitoring and early-warning of the combination of hardware and software of network application system. It can provide a feasible solution for environment monitoring and early-warning.
Energy Flow Analysis of Energy, Social Economy and Environment Complex System in Sichuan Province, China
Authors: Liu Wei , Huan Han Qing , Chen Dong Dong , Liu Liang , Chen Chao Fan
Published: March 2013

Energy is an important asset in modern society. According to the relative data and materials, the energy flowchart of Sichuan province in 2010 was drew at first, then the energy input, output, consumption, corresponding pollutants emission of Sichuan province from 2005 to 2010 were analyzed simultaneously. The results show that the total energy consumption increases rapidly with an average annual growth rate of 10.8%, energy external dependence is little. Energy consumption structure need to be further optimized, and the proportion of traditional fossil energy is larger, which is 77.18% in 2010. Then, we establish the evaluation index of regional energy, social economy and environment complex system, and the coordination degree between energy, economy and environment system in Sichuan province from 2005 to 2010 is analyzed, the results show that the coordination degree is high, and the comprehensive coordination degree of complex system is 0.97238 in 2010. Finally, suggestions of energy development strategy, optimization management of energy flow, energy conservation and emission reduction in Sichuan province are proposed on the basis of the analysis results.
Evaluation of Economic Development Process on Environmental Pollution Status in Hanoi, Vietnam
Authors: Li Jian Hua , Nguyen Thi Thu Thuy , Duong Kim Giao
Published: March 2013

After 20 years of innovation, the economy of Vietnam has achieved high growths with lots of advantages for the country’s industrialization and modernization process. The country has gradually reduced poverty, created more jobs, improved people's life standards and narrowed down the economic gap between its own and that of other countries in the world. However, economy growths have at the same time caused big pressure on the quality of the environment, especially in big cities like Hanoi and Ho Chi Minh city. The environmental problems such as water pollution, air and solid waste are becoming more and more serious. This paper presents discussions on the following issues in the case of Hanoi: (1) an analysis of the economy development from 2008 up to present; (2) the influences of industrialization- modernization-urbanization process on environmental quality; (3) an analysis of the environmental pollution; and (4) a proposal of the possible measures to protect living environment towards a sustainable development.
Model Calculation and Analysis of Geological Environmental Capacity in Qian'an Mining District
Authors: Li Zheng Sheng , Liu Wen Sheng , Guo Hao Ran
Published: March 2013

This paper puts forward environmental bearing capacity relative surplus rate and calculation model based on the theory of environmental bearing capacity, Through collecting and estimating the predictive value and ideal value of each index in different development stages and schemes, using analytic hierarchy process to established the target weight, environmental bearing capacity relative surplus rate of the rule layer and index level in Qian’an Mining area are calculated through the gradual convergence principle, accordingly the optimal solution to improve the environmental bearing capacity of Qian’an mining area is determined ,which provides scientific basis for promoting to realize the sustainable development of Qian’an Mining area.
Study of an Original Regulating Voltage Soft-Start Method
Authors: Yu Sheng Zhe , Yu Yan , Yu Ning
Published: March 2013

Reliable soft-start system is crucial to smooth and safe operation of belt conveyor. Therefore, based on analysis of behaviors of the three-phase asynchronous motors’ reduced voltage starting and ordinary hydraulic coupling independently applied to the conveyor belt, this essay proposes an original method of regulating voltage soft-start, introduces the principle and process of soft start, and determines strategies on power balance among several motors.
An Approach to Monitoring of Gearbox Based on HHT Spectrum
Authors: Chen Zhi Xin , Sun Hai Tao , Xie Shi Kun
Published: March 2013

Hilbert-Huang Transform (HHT) Spectrum is analyzed, and is compared with Wigner-Ville distribution(WVD). And it is proposed a method that is “band pass filtering --signal purification and reconstruction --HHT spectrum analyses” method to carry on the state recognition and fault diagnosis of the mechanical equipment. The compared signals include: the signals of harmonic, amplitude modulation and frequency modulation, and the mixed signals that are composed of these single signal, then it is pointed out: HHT Spectrum have higher frequency resolution than WVD, and it has overcome the latter influence of cross-term interference. At last, real signals of fault gear are analyzed by this method, and it is indicated that the method can offer a new and effective method for fault diagnosis and condition monitoring.
Construction and Research of Virtual Network User File System Based on Upnp and FUSE on Linux
Authors: Xue Nian , Jia Li Wei
Published: March 2013

The Development of the computer has been from a single machine to the server, and then server clustering technology, and the emerging "cloud" network, which invariably show the network's role in the computer. Meanwhile, more and more high-end hardware trash or the users may be unbearable of high cost of servers, so the use of existing resources and integration of resources has become increasingly important. This paper will detail a virtual network file system, which based on Upnp (Universal Plug and Play) and FUSE (File system in Usese Space) in Linux operating system. In this study, users can share a computer terminal to collect and use that particular computer terminal on the network to all the resources users are interested in, provided that the shared computer terminals must be installed on a specific Upnp device. In this study, we have successfully implemented single-device-side and single-device-side multithread communication under the Linux or windows operating system.
Hybrid Discrete Variable Robust Design Optimization Based on the Intelligent Single Particle Algorithm
Authors: Liu Mao Fu , Han Hui Xian
Published: March 2013

Aiming to solve the problems of hybrid discrete variable robust design optimization in engineering practice, Particle position vector discretization method is applied toimprove intelligence single particle algorithm. A program written by MATLAB is designed for solving the problems of hybrid discrete variable robust design optimization. The paper verified the effectiveness and practicability of the method through an example of plane dimension chain’s discrete tolerance robust optimization design in the field of mechanical manufacturing.
Research on Radio Frequency Identification Technology
Authors: Hu Xu Ling
Published: March 2013

Radio frequency identification (RFID) is an automatic identification technology, is characterized by its greatest non-contact identification. In recent years, RFID technology is widely used in transportation management, logistics management, production automation, security access checking, warehousing management, security management, animal management, and other fields. Apply RFID technology to manage applications for research is important.
The Study on CNC Machine Tools Reform and Error Analysis
Authors: Liu Xue Peng , Zhao Dong Mei
Published: March 2013

The control program and servo system of CNC machine tools is analyzed. By pitch error and quadrant error compensation, the positioning accuracy in X-direction is ± 20 μ m.
Single Crystal Alloy on the Creep Behavior of Holes Multi-Level Transformation Arrangement Algorithm Simulation
Authors: Meng Lei , Zhang Shu
Published: March 2013

Organizations can significantly reduce defects in single crystal nickel-based alloys and plastic creep life, with the creep for the alloy in the near hole region  bent along the direction of applied stress axis was 45 angle to form raft-like structure, the circular hole defects elongated along the stress axis into an oval, and the formation of cracks in the holes on both sides and along the direction perpendicular to the stress axis expansion. During the high temperature creep, stress region near the contour holes with disc distribution, along with the applied stress axis orientation angle of 45 have greater value, the stress distribution is converted to  phase angle of45 raft-like structure of the main reasons.
Plastic Analysis of Metal Sheet Forming with SD Effects
Authors: Chen Zhen Yu , Wu Chun Du , Wang Zhong Xian
Published: March 2013

Generally, many high-strength alloy materials used in aerospace, power and chemical industries have strength differential effect in tension and compression (SD effects). Usually, in mechanical calculations of sheet metal forming, Treasca yield criterion and Mises yield criterion are applied. Because the yield criterions don’t take SD effects into consideration, the calculation result may have errors for certain materials. However, generalized twin shear stress yield criterion, which takes into account the influence of the intermediate principal stress, is more suitable for most metal materials than Mohr-Coulomb strength theory. Therefore, this article has made plastic analysis on thin film stress issues of metal sheet forming with generalized twin shear stress yield criterion. We have obtained a unified plastic solution to the internal and external stretching issue of thin material with rounded holes and different tension and compression ratio. Providing a new result with wider applicability is very significant.
A New Resonance Rayleigh Scattering Assay for the Determination of Trace Hg(II) Using the Immunonanogold as Probe
Authors: Xu Li Li , Jiang Zhi Liang , Wang Yu Zhen , Yang Hong , Deng An Ping
Published: March 2013

Nanogold (NG) in size of 10 nm was prepared by the NaBH4 procedure. A new ligand 6-mercaptonicotinic acid (MNA) was used to couple both methylmercury chloride (CH3HgCl) and carrier protein to obtain an immunogen, it was immunized BALB/C mice, and the spleen cells of immunized mice were fused with myeloma cells. The monoclonal antibody (mAb) against mercury (II) ions was produced by the hybridoma technique. The mAb was labeled the NG to prepare an immunonanogold (ING) probe for Hg(II). In pH 5.4 Na2HPO4-citric acid buffer solution and under the condition of ultrasonic irradiation, the ING particles were aggregated un-specifically to form big particles that exhibited a strong resonance Rayleigh scattering (RRS) peak at 580 nm. When the Hg(II) was added, the specific immunoreaction of ING-Hg(II) take place, and the ING-Hg(II) immunocomplex dispersed in the solution that caused the RRS intensity decreasing linearly at 580 nm. The decreased intensity was linear to Hg(II) concentration in the range of 0.025-10 μmol/L, with a detection limit of 1.1 nmol/L Hg(II).
Research on Rolling Force Model Based on Distributed Cooperative Control System
Authors: Li Hong Jie , Huang Qing Xue , Ju Chang Jiang , Gong Xiu Lian , Wang Jian Mei
Published: March 2013

Three-stand mills continues produced of multi-layer composite steel plate, multiple L2 servers together computing to complete the tasks, serviced to many models in whole automated production process. In this paper, multi-embedded systems distributed and cooperative control program takes instead of multi L2 server mode, one L2 data collection and record server was remained. An example of rolling force model is used to discuss the control architecture, Sims simplified formula. The experiment and numerical results show that the control architecture is capable of reliable operation, and the accuracy of the target is no less than 94%.
Design of Amplifying Circuit for Receiving Weak Signal for Laser Fuze
Authors: Zha Bing Ting , Zhang He , Wang Jun Hong , Guo Jing
Published: March 2013

The echo signal received by laser fuze was very weak when the detection range increased. In order to expand the operating range of fuze, the reception capacity of fuze for weak signal should be improved. According to the requirements of long-range laser fuze receiving system as small volume, low-power, low-noise, high-gain, the amplifying circuit of the receiving system was analyzed and designed. To improve the ability of laser fuze for detecting weak signal, the high-sensitive, low-noise, inner-gain avalanche photodiode (APD) was used as a photodetector in the system, and the low-noise preamplifier and voltage amplifying circuit was designed. The noise and frequency response of the amplifying circuit was researched and analyzed by simulation and experiment. The results show that the design is effective and feasible, which can meet the requirements of processing circuit as receiving weak signal from long-distance.
Aerodynamic Design and Numerical Simulation Analysis of a Passenger Car’s Defrosting Duct
Authors: Yang Bo , Huang Li Na , Ren Feng Tao
Published: March 2013

Aerodynamic design of airflow duct has become an important issue of the automobile Heating, Ventilation and Air Conditioning (HVAC) system. In this research, the HVAC defrosting airflow duct of a passenger car was designed using Computational Fluid Dynamics (CFD) method. The HVAC defrosting outlets’ sizes and positions were considered as design variables. The mass flow rate distribution and the cabin flow structure were considered as design targets. The steady Reynolds Averaged Navier-Stokes (RANS) method was adopted because it is an efficient way to help select possible good designs in the early stage of new product development without time consuming and huge computational cost of the unsteady methods. Various duct design configurations were evaluated by analyzing the defrosting mass flow distribution of each flow outlet and by visualizing the flow structure near the windshield and the front left side window. The CFD results showed that the total area of the outlets near the rain wipers was a decisive parameter for mass flow distribution in this duct design. The defrosting flow structure near side windows were difficult to be improved only by enlarging the area of the outlet. The effective flow structure was realized by choosing proper angles of the vanes skirt of the outlets to defrost the windshield region. The overall performance of HVAC system, such as defrosting time and cabin temperature distribution, could not only be predicted based on the results of the steady RANS method. It was shown that the important parameters including the mass flow distribution of each outlets and the flow structure near the windshield and side windows could be quickly evaluated from the steady state CFD simulation results in the early design stage.
The Research of Impeller Used in Wave Energy Power Generate Equipment
Authors: Wang Shi Ming , Jiang Lin Lin , Hu Qing Song
Published: March 2013

At first, the impeller power generate equipment was introduced in this paper. Second, the instantaneous velocity that the wave got into the equipment and the movement of the wave in the equipment was illustrated. At last, the stress, deformation and coefficient of safety were calculated by ansys under three different height of wave.
Experimental Study of Capillary Radiant Cooling System with Parameters Changing
Authors: Wang Yong Hong
Published: March 2013

In this paper, the test methods of radiation laboratory and data analysis in detail were introduced. The impact of the capillary system with different parameters changing, such as water temperature or water flow the capillary cooling capacity changes, and the capillary cooling system when the initial radiation response time were specificially studied. Under different parameters while cooling capillary volume changes associated with the indoor temperature can be seen under certain conditions, the capillary cooling capacity and room temperature has a linear relationship.
Spectral Clustering Algorithm of Uncertain Objects
Authors: He Tong
Published: March 2013

By extending classical spectral clustering algorithm, a new clustering algorithm of uncertain objects is proposed in this paper. In the algorithm, each uncertain object is represented as a Gaussian mixture model, and Kullback-Leibler divergence and Bayesian probability are respectively used as similarity measure between Gaussian mixture models. In an extensive experimental evaluation, we not only show the effectiveness and efficiency of the new algorithm and compare it with CLARANS algorithm of uncertain objects.
Experimental Study on the Durability Performance of PPS Filter Media
Authors: Mao Ning , Chang De Qiang , Liu Jing Xian , Sun Xi
Published: March 2013

The durability performance of PPS filter media is experimentally studied in the paper. It is found that, under 200°C and atmospheric condition, both machine direction strength and transverse direction strength of PPS increase at the beginning and then gradually decrease with the increase of duration time. The transverse direction change for both strength and elongation is higher than the machine direction. The melting point of PPS decreases with the increase of duration time. And the melting point can be taken as one of durability index for the PPS filter media.
P-SS Algorithm for Solving the Eigenvalue Problem of Finite Element System
Authors: Wang Jie Fang , An Wei Guang
Published: March 2013

P-SS algorithm for solving eigenvalue problem was obtained, based on the power method and the similar shrinkage method. This algorithm can be used to not only solve all eigenvalues of small system, but also partial eigenvalues of large finite element system. The calculation program of this algorithm is universal and practical. Compared with the existing methods, the error of P-SS method is very small, and it signify that the new method is feasible and convenient.
Comparative Study of the Flow in a Differentially Heated Cavity Using Thermal Lattice Boltzmann Method
Authors: Chen Wei Shan , Dong Di Bo , Hou Zhen Xiu , Shi Sheng Jun
Published: March 2013

A D2Q9 thermal lattice Boltzmann model is applied to investigate the flow in a differentially heated cavity. The paper is intended to analysis the physics of heat and mass transfer in a closure cavity filled with air. For three Rayleigh numbers Ra, the aspect ratio K are varied from 1 to 10. Results of validation indicate this algorithm is reliable and easy for implementation. It can be found that the circulation rate of heat driven flow get lower when the K get higher. Also, the Nusselt number Nu tends to be approximated to 1 when K is higher than a critical value, which is depended on the value of Ra.
Continuum Aeroelastic Model and Flutter Analysis for a Variable-Span Morphing Wing
Authors: Huang Ren , Qiu Zhi Ping , Wang Xiao Jun
Published: March 2013

A linear aeroelastic continuum model for a variable-span wing is developed. Considering the fixed inboard part and the movable outboard part of the wing, a stepped Euler-Bernoulli beam with three jumped discontinuities in its spatial span is used for structural modeling. The dynamic analysis of stepped beam is introduced by a dimensionless form. The time-domain aerodynamic forces are calculated by a reduced-order unsteady vortex lattice model. Then the first-order state-space aeroelastic formulations are built by using the Galerkin method. The impact of the different wing configurations is of particular interest for understanding the fundamental aeroelastic behavior of variable-span wing. To clarify the implementation of the proposed method, a simple variable-span wing with the basic parameters of the Goland wing is studied, and numerical simulations are provided to demonstrate the flutter speeds and frequencies for different wing configurations.
Meshing Method of Calculating Water-Entry Flow Field at High Speed
Authors: Zhu Zhu , Yuan Xu Long , Wang Ya Dong , Yan Yun Ju
Published: March 2013

An important part of the numerical simulation is the grid which the quality has great influence on the calculation precision, and also the influence often is crucial factor in most of situation. Water-entry at high speed is a complex unsteady process, and its numerical simulation needs to take consider of natural cavitation as well as rotation of the underwater body. In this paper, a new meshing method was given with using the Layering, Smoothing and Remeshing for calculating the unsteady flow field. Numerical simulation shows that the mesh given in this paper has better quality, and can be used to calculate the multi-phase mode of water-entry at the high speed.
Comparison of LES and RANS Models in Compartment Fires Simulation
Authors: Liu Peng , Gao Ye , Li Shu Sheng
Published: March 2013

Fire is an extremely complex phenomenon with combustion, flow dynamics, radiation, and chemical reaction and so on. At present, there are two field models often used in compartment fires, which are Large Eddy Simulation (LES) models and Reynolds-Averaged N-S (RANS) models. In this page, three cases of the compartment fires are simulated with both of the two field models. By comparing the temperature of different models to the available experimental data, LES apply to the big space compartment fires and RANS work for the tunnel fires. Both of the models can be used in room fires, but the result is not very well. In the future, there is more work to do on researching the field model in compartment fires.
Analysis of Non-Standard Gear Contact Fatigue Life
Authors: Xu Ying Qiang , Zhao Jian Hua , Shi Zu Heng
Published: March 2013

A model of gear contact has been established based on Hertz theory in this thesis, Analysis of non-standard gear contact fatigue life test process . For ha* take 1,1.15,1.25 and c* take 0.25,0.5 respectively ,the gear generates contact fatigue failure, then calculate the meshing ratio under different tooth high coefficients, and gear pairs state with fatigue testing time by the finite element method and orthogonal test. These data are compared with the results of specific experiments verified. They description that tooth height coefficients and headspace coefficients change have a great impact on gear contact fatigue life.
Effect of (NaPO3)6 on Sea Water Corrosion Resistance of Micro-Arc Oxidation Ceramic Coatings Formed on Pure Aluminum
Authors: Li Shi Jie , Wang Lu Ming , Feng Xiao
Published: March 2013

(NaPO3)6 was added to Na2SiO3-KOH electrolyte system ,and in-situ ceramic membranes were prepared on pure aluminum by micro-arc oxidation technique. The composition and structure of the micro-arc oxidation ceramic layer and the influence on the performance of the corrosion resistant to sea water were studied through the scanning electron microscopy,X ray diffraction and electrochemical polarization curve method.The results show that the ceramic membrane formed in electrolyte containing (NaPO3)6 indicate a considerable increase in coating compactness and bond strength.The dynamic potential polarization curves in simulation sea water show that adding proper (NaPO3)6 can increase the ability to resistant the sea water corrosion.When the mass concentration is 2g/L,the corrosion resistant to sea water is the best.
Characteristics of Stress Distribution of Micro-Cantilever of Polycrystalline Copper at the Pull-in Voltage
Authors: Su Ji Long , Zhang Yan Jiao , Lian Xing Feng
Published: March 2013

The Ansys simulate software is utilized to analyze pull-in voltages and stresses of the fixed end of micro- cantilever beam with different thicknesses respectively. Based on the analysis of the electrostatic force at the pull-in voltage, the stress of fixed end of micro-beam and the maximum deflection are obtained. The relationship between the stress of fixed end and thickness is established. The results show that the mutation thickness of the stress and the pull-in voltage are at and respectively , it is consistent with the intrinsic size of the polycrystalline copper micro-beam.
Spacecraft Attitude Tracking Using Second-Order Sliding Mode Control via Backstepping
Authors: Hao Yong , Yan Xin , Zhang Bo
Published: March 2013

A second-order sliding mode control (2-SMC) based on backstepping is proposed to improve the performance of spacecraft control system for the chattering of traditional sliding mode control (SMC) in practical application. Original system is transformed according to 2-SMC theory Then, an appropriate Lyapunov function is select based on designed sliding manifold of the 2-SMC. The simulation results demonstrate that the proposed controller improves the performance with better tracking specifications in the case of external disturbances, better behavior of the output and faster convergence of the sliding surface while maintaining the stability.
Quasi-Sliding Mode Control for Impulsive Delayed Vehicle Longitudinal Following System with Bounded and Varying Parameters
Authors: Xu Xiao Hui , Fu Wen Chao , Zhang Ji Ye , Xi Wang
Published: March 2013

In the real automated highway system, various factors to vehicles which are moving make the velocity of vehicles change suddenly. In this paper, assuming that the mass of vehicles, the drag coefficient and the resistance of the ground were uncertain, the controller for a class of time-varying delayed look-ahead vehicle longitudinal following system with impulsive effect was designed by using the idea of quasi-sliding mode control. An example is given at last to test the controller proposed in this paper.
Design and Implementation of Adaptive Fuzzy Cerebellar Model Articulation Controller for Direct Torque Control System
Authors: Wang Shun Yuan , Tseng Chwan Lu , Tseng Chun Han , Chou Jen Hsiang , Tsai Meng Han
Published: March 2013

This study implemented fuzzy control theory with a cerebellar controller to design a fuzzy cerebellar model articulation controller (FCMAC), ensuring system stability by deriving an adaptive FCMAC weight update rule from the Lyapunov theory. The speed estimator design in this study is based on the structure of an adaptive stator flux observer (ASFO) to achieve rapid sensorless control. According to results from experiments, installing the adaptive FCMAC speed controller in the induction motor’s direct torque control system demonstrates excellent speed dynamic response.
The Speed Control of Immune-Fuzzy Sliding Mode Controller for a Synchronous Reluctance Motor
Authors: Lin Wen Bin , Chiang Huann Keng , Chung Yu Lung
Published: March 2013

In general, the conventional sliding mode control design is assumed that the upper boundary of parameter variations and external disturbances is known, it causes high frequency chattering and high gain phenomenon by using sign function, else steady-state error by using sat function. Immune-Fuzzy theorem simplifies the complexity of humor system, as well as introducing fuzzy control. This paper presents an Immune-Fuzzy sliding mode controller (FISMC) not only eliminate the system uncertainty but also overcomes the drawback of sign function and sat function. Finally, the performance of the proposed method is verified by simulation. The proposed FISMC shows the robustness for the motor parameters variation and the improvement of chattering phenomenon.
Research on Modeling and Control Characteristics for Electric Power Steering System of Logistics Machine
Authors: Chen Guo Jin , Liu Tin Tin , Ni Jing , Chen Hui Peng , Feng Huo Qing
Published: March 2013

Aiming at the characteristics of the all-electric logistics machines, the paper established the multi-disciplinary mathematical models of the electric power steering system (EPS) and set up a semi-physical simulation platform based on dSPACE for the multi-domain system of EPS. The robust control method was applied to improve the EPS system for the stable actual output of the EPS multi-domain system in the uncertainty. By the real-time semi-physical simulation, the control features of the improved EPS multi-domain system were analyzed so as to increase the robustness and adaptability of the EPS system.
Robust Controller of Self-Powered Vehicle Active Suspension Based on LMI Design
Authors: Wang Peng , Song Peng Yun , Zhang Ji Ye , Li Ming
Published: March 2013

For vehicle suspension system with norm-bounded uncertain parameters, this paper presents a robust optimal guaranteed cost controller by the quadratic performance index with cross-weighted terms. This controller is able to make the vehicle suspension system keep stable with the parameter perturbation and ensure optimal performance. Then the energy balance analysis is presented and an energy balance condition is given. The simulation results show the feasibility and effectiveness of the controller algorithm. Meanwhile this controller has better performance than both robust controller designed by Riccati equations and LQG controller.
The Viscoelasticity of Intestines by Dynamical Mechanical Analysis
Authors: Tan Ren Jia , Liu Hao , Zhang Cheng , Li Hong Yi , Wang Yue Chao
Published: March 2013

The research for viscoelasticity of small intestine become significant in engineering due to the development of new medicine instruments such as the capsule robot and intellectualized endoscopy, which may help learn the unknown mechanical interaction between the intestinal tissue and the instrument. Therefore, a research of testing the mechanics of intestinal tissue in this paper is presented, which may help cognize intestinal viscoelasticity. As distinct from the conventional stress relaxation test, DMA (Dynamical Mechanical Analyzer) is applied in the experiment, and a large number of data is obtained by DMA, which have not been used in this area before, and is able to reveal directly the essential viscoelastic parameters of the intestinal tissue. The experiment result explicit the dissipated energy becomes larger when the strain amplitude increases. The DMA test and the experiment analysis introduce a particular angle of view in researching the viscoelasticity of intestinal tissue, and that is convenient for quantitative analysis and synthesis for deeper cognizing intestine in the future.
Theory and Technique on Design of Extended Range in Solar Powered Intellective Vehicles
Authors: Chen Ding Yue , Wu Hai Peng , Bao Jian Chao , Wang Li Feng , Gu Zhao Bin , Jing Ling Lang
Published: March 2013

Solar powered intellective vehicles (SPIVs) not only focus on energy saving and environmental protection, but also have finer feasibility. The design of extended range in SPIVs is a kind of the important directions that low carbon green vehicles will be design in future. We will reflect demanding design of extended range shoot to convert the target design level. The optimal design is actualized for photovoltaic array collocation of solar energy in SPIVs. The “zero oils consume, zero exhaust, increment drives distance” demand of SPIVs are carry out by the vehicle with design carries to net electrical source system of extended range.
Finite Element Simulation of the Artificial Knee-Joints of Similar Type Pairing
Authors: Liu Li , Wei Lin , Liu Zhi Hong
Published: March 2013

The stress relationship between several pairings was studied through the contrastive contact analysis between the artifical knee-joints of the same type pairing and similar type pairing in different angles and conditions to expand the application of the existing artifical knee-joints. The result shows that, the maximal equivalent stresses of the artifical knee-joints of similar type pairing are more than those of the artifical knee-joints of the same type pairing generally. The law is especially clear in conditions of larger force. In conditions of walking on the flat ground and climbing the stairs, the stress growths between 4/3 pairing and 3/3 pairing are the largest in 10° , they are 18.3% and 14.5% respectively; the stress growths between 3/2.5 pairing and 3/3 pairing are the largest in 20° , they are 13.4% and 15% respectively.
Simulation of Two Dimensional Nanoscale Cutting Copper by Quasi-Steady Molecular Statics Method
Authors: Lin Zone Ching , Huang Wei Fu
Published: March 2013

Abstract. An orthogonal cutting is a symmetric cutting thus it can be modified as a two dimensional cutting. This paper uses quasi-steady molecular statics method to carry out simulation of two dimensional nanoscale cutting copper work piece by the diamond tools. For the two dimensional quasi-steady molecular statics nanoscale cutting model used by this paper, when the cutting tool moves on a copper work piece, displacement of atoms is caused due to the effects of potential on each other. After a small distance that each atom moves is directly solved by the calculated trajectory of each atom, the concept of force balance is used. The minimum energy method is employed to carry out the search, and obtain the new movement position for each atom. Based on the simulation results, this paper studies the chip formation shape and cutting forces in x direction and y direction.