bluuebunny/crossref_metadata_2025 huggingface dataset:
Carbon Footprint of Spring Maize Production System on State-Operated Farm in Northeast China Plain
Authors: Shi Lei Gang , Yu Ying , Huai He Ju , Zhou Jing Ping , Hu Hai Tang , Li Cun Jun
Published: October 2013

In order to calculate the carbon footprint of agricultural production on farm, this paper, based on the investigation data of the farmers production, applying carbon footprint model, evaluated the carbon footprint (CF) of spring maize production systems (SMPS) on farm and its production teams in Northeast China Plain. The results were as follows: the CF of SMPS was 863.14.42±104.17 kg CO2e ha-1, in which chemical fertilizer accounted for 44.60%, mechanical operation accounted for 42.96%, seed accounted for 9.96%, and pesticides accounted for about 2.48%, respectively. The CF of SMPS in different production teams were significantly different (P<0.01), 18th production teams was the highest (958.37±81.73 kg CO2e ha-1) and 19th team was the lowest (767.84±45.98 kg CO2e ha-1). The differences of the CF of SMPSR among production teams almost was resulted from nitrous fertilizer using. Therefore, it had the potentiality of emission reduction in the production teams with higher CF. Using a fertilizer-saving way to build a low-carbon agricultural cropping pattern, that is an important way to realize agricultural energy saving and emission reduction of farm in the Northeast China Plain.
Study on Equipment Central Retirement and Disposal Benefits Evaluation Based on Value Engineering
Authors: Shen Ying , Wang Dan , Wang Yu Quan , Wu Jun Wei
Published: October 2013

Equipment retirement is one of critical links in for total life management, and is an important content. There are urgent problems that should be settled, how in the limited time to broaden the disposal channels and methods of retired equipment, dispose well the centrally retired equipment, fully act as value, and come true the best comprehensive benefits of politics, military affairs and economy. In the paper, with the rules of scientificalness, integrity, operability, qualitative and quantitative, it evaluates relative the ratio of effective and cost in accordance with the theory of value engineering, constructs the evaluation model of equipment retirement disposal benefits based on the Forced Decision Method of value engineering theory, sequences the disposal concept by calculating the value coefficients of every concept, thus it makes for producing the diversified scientific disposal management system of retired equipment, plays fully the value of retired equipment, and comes true the best comprehensive benefits of politics, military affairs and economy.
Discussion on the Using of TQC Theory in Project Management in Water Supply Engineering
Authors: Shan Jun , Tian Jin Xia , Lue Jian , Si Qi
Published: October 2013

The number of study about TQC theory in the project planning and construction period is more than project operation period. Taking the water supply project as an example, in the operation period of the project management mainly relates to the technical management and system management, and take advantage of facilities management theory , discussed water supply project in how to apply the theory of project management. In order to improve China's management level in water supply engineering.
Fishpond Reconstruction Based on Water Quality Security for the East Route Project of Diverting Water from the South to the North of China—With an Example of Weishan County Shandong Province
Authors: Wang Wan Xi , Zhu Jian Qiang , Li Gu
Published: October 2013

Weishan County gets its name for Weishan Lake, also known as Nansi Lakes because it consists of the four major lakes (Small Weishan, Zhaoyang, Dushan and Nanyang). Weishan Lake is an important water source in Shandong Province and one of the main impounded lakes in the East Route Project of Water Diversion from the South to the North. In order to ensure the water quality, the relevant cities and counties of Shandong Province attach great importance to water pollution control around the Weishan Lake. According to field investigation and analysis of present situation of the project area, common problems existed in pond culture along Weishan Lake were found out, meanwhile the targeted solutions for them were given aiming at the transformation of snakehead farming pond by ecological engineering, that focus on an establishment of the demonstration base so as to demonstrate a mode of aquiculture that is environmentally friendly, to enhance ecological health of aquiculture for sankeheaded, and to provide a strong guarantee for the East Route Project of Water Diversion from the South to the North to have a good water quality.
Pollution Characteristic Analysis during the Recycling Process of Waste Methanol
Authors: Ma Ying Qun , Ma Hong Zhi , Zheng Lu , Yang Jian , Liu Yi Feng , Wang Qun Hui
Published: October 2013

According to the directory of hazardous waste, Waste methanol belongs to the hazardous waste. Production of methanol will produce ethers, ketones and other impurities. During the distillation for waste methanol, high concentrations of distillation waste will be produced. In this paper, waste methanol recovery process in a southern chemical plant was adopted as the research object. Methanol and distillation waste were sampled and analyzed, combined with domestic research findings about waste methanol and other organic pollutants, the emission and pollution characteristics of waste methanol were discussed. The results show that Ethers and ketones are the main contaminants of methanol; it has potential hazards for products with such methanol as raw materials. The distillation waste has high COD concentration, containes methanol, mixed alcohol and other toxic substances, which has the risks for environmental pollution and human health.
Ventilation, Turning and Additive Effects on Odor Emissions and Municipal Solid Waste (MSW) Bio-Drying
Authors: Cai Xian Ming , Li Chun Ping , Qin Xia , Zhang Hong Yu
Published: October 2013

A series of biological drying and odor emissions experiments of municipal solid waste (MSW) was made by using independently developed biological drying device. . The results show that: Ventilation increasing contributes to the loss of water and reduction of H2S emission, as well as conducive to biochemical reactions. Additives of T2 and T4 can significantly reduce the emission of H2S and additives of T2 and T3 can significantly reduce the emission of NH3, thus, T2 can preferably chose as biodrying deodorant. Turning process has a certain impact on the biodrying product moisture content, moisture content decreases with the increase of turning times, the moisture of final biodrying product reached 25% when turning twice, reached 22.5% when turning 3 times and, reached 19.1% when turning 4 times. Thus, increase the turning times can significantly reduce moisture content.
Plant Quarantine between Thailand and China
Authors: Cheng Ying Hui , Zhou De Qun , Zhang Gui Ming , Wang Ying , Wang Ying
Published: October 2013

Free Trade Area (FTA) reached and validated between ASEAN and China has promoted plant and plant products trade dramatically between Thailand and China since 2000. As the agricultural products trade has kept increased rapidly, the pests management and quarantine become serious and challenging to these two countries in terms of ecological security and biosafety. This paper analyzed the situation of plant and plant products trade between Thailand and China from 2003 to 2012, including the kinds and amounts of plant and plant production, epidemic situation analysis which carried by import and export plant and plant products. There are over 400 kinds of plant and plant products which were trade between Thailand and China, and over 1000 genera (species) pests were intercepted including 79 genera (species) quarantine pests. In this paper, the bilateral arrangement related to plant quarantine was also analyzed. The current issues and problems of quarantine pests research, management and quarantine are articulated and suggestions how to improve or upgrade related researches and quarantine level were proposed in this paper.
Water Quality Evaluation and Pollution Control Measure for Erlongshan Reservoir
Authors: Ke Zhao , Yu Zhang , Gang Zhu , Zheng Kong
Published: October 2013

Erlongshan Reservoir water quality was evaluated for Class Ⅳand Class Ⅴby monitoring continuously indexes and was unable to meet the requirement of central drinking water source due to higher CODMn, TN and TP and eutrophic environment. The treatment measure including pollution source control and pollutant reduction was put forward for the sake of water quality improvement.
Enhanced Sludge Dewatering Performance by a Novel Bioflocculant Conditioning
Authors: Liu Jie Wei , Ma Jun Wei , Liu Yan Zhong , Yang Ya
Published: October 2013

The characterization and use in sludge dewatering of a novel bioflocculant M-C11 produced by Klebsiella pneumoniae was investigated. The purified M-C11 was composed of 91.20% sugar, 4.61% protein and 3.91% nucleic acids (w/w). Fourier transform infrared (FT-IR) spectroscopy of purified M-C11 confirmed the presence of carboxyl, hydroxyl, methoxyl and amino groups. The sludge resistance to filtration (SRF) decreased remarkably from 11.64×1012 m/kg to 4.66×1012 m/kg under the optimum conditions (pH=6, 3 mL bioflocculant and 4 mL CaCl2 dosage), after being conditioned with bioflocculant M-C11, which was more efficient than inorganic flocculants. Results showed that M-C11 could serve as a substitute for chemical conditioners and a promising alternative to the sludge treatment industries.
The Influence of Recycling Agents on the Performance of Regenerated Asphalt
Authors: Ming Tu Zhang , Zhuang Yuan , Hu Guang Wei
Published: October 2013

In this paper, the ageing degree of recovered asphalt collected from old asphalt mixture is firstly estimated by comparing with virgin asphalt. Then, two kinds of different recycling agents are selected to mix with recovered asphalt. The influence of recycling agent type and content on regenerated asphalt performance is then studied. The results show serious condition of ageing and high viscosity of waste asphalt. As the recycling agent content increasing, the asphaltene and resin content of regenerated asphalt reduced, the aromatics content increased, while the saturate content showed a small increasing. Within this experiment, the penetration and the ductility of regenerated asphalt increased, while the softening point reduced as the recycling agent content increasing.
Study on the Preparation of Activated Carbons with Baijiu Vinasse
Authors: Chen Ling Lin , Zhao Hua
Published: October 2013

Activated carbons were prepared with Baijiu vinasse in this study. The response surface method was used to optimize the process parameters of NaOH solution boiling treatment to extract the protein in Baijiu vinasse. Ascertaining the optimum conditions that NaOH solution concentration is 2.5mol/L, treating time is 2hours and solid-liquid ratio is 1:4. So the protein retention rate is 1.116%.The methods of ZnCl2 chemical activation and high temperature calcination activation were used to prepare activated carbons. Under the optimum conditions of ZnCl2 concentration 50%, solid-liquid ratio 1:2, calcination time 120min, calcination temperature 600°C, the methylene blue adsorption reaches to 208mg/g.
Study on the Residue of Plastic Film in Inner Mongolia Autonomous Region
Authors: Fu Yu , Xie Jian Hua , Zhang Lin Hai , Zhang Ming Hao , Hou Shu Lin
Published: October 2013

The study investigated the amount of mulching plastic film residue in corn¡¢potato and vegetable fields in Inner Mongolia Autonomous Region. The result shows that there has been a very serious pollution, and the average amount of residue of mulching plastic film remained in the farmland of Inner Mongolia is 36.3kg/hm2. The average amount of residue of mulching plastic film remained in the corn field soils is 56.25 kg/hm2, the potato fields were38.7kg/hm2, the vegetable fields were 25.05kg/hm2. The results also showed that more than 73% residual film remains in the 0 ~ 10cm plow layer, and the amount of plastic film residue depends on duration of utilization of mulching plastic film, and the longer the duration of utilization, the more plastic film residue is left in the field.
Distribution of Chemical Fractions of Heavy Metals in Sewage Sludge: A Review
Authors: Wu Xiao Hui , Zhang Jun
Published: October 2013

overmuch heavy metal is one major restrictive factor for land application of sewage sludge. The environmental behavior of heavy metals depends strongly on their specific chemical fraction or binding state in sludge. The present paper gives an overview of recent researches about the chemical speciation of heavy metals in sludge. A detailed discussion was also made on the various problems associated with the distribution of chemical fractions of heavy metals in sewage sludge, which need to be addressed while exploring more efficient treatment of removing heavy metal.
Effect of Co-Composting of Kitchen Waste and Agricultural Waste on H2S and NH3 Emission
Authors: Zhang Hong Yu , Li Guo Xue , Yang Jin Bing , Yang Qing Yuan
Published: October 2013

NH3 and H2S emissions not only reduced the nutrient content of compost, and caused odor pollution during organic waste composting. In this study, composting kitchen waste, agricultural waste and co-composting kitchen waste and agricultural waste were conducted. The temperature, oxygen content and the typical odors emission were analyzed in all treatments. The results indicated that Co-composting kitchen waste and agricultural wastes significantly improve the pile temperature and shorten the mesophilic stage. Poor O2 transfer and pile temperature were the main reason for H2S production during waste composting. H2S release occurred mainly within 15 days in this study for all treatments. The highest concentration of H2S was observed in the treatment of T2. The productions of H2S were reduced by 24.8%, 42.3% and 55.1% for T1, T3 and T4 that compared to T2, respectively. The NH3 had a similar trend to that of H2S. About 66.4%-72.0% of the total NH3 released in the high temperature stage for all treatments. The highest concentration of NH3 was observed in the treatment of T4.The productions of NH3 were reduced by 36.5%, 19.8% and 21.3% for T1, T2 and T3 that compared to T4, respectively. In terms of H2S control, it is suitable to co-composting of kitchen waste and agricultural waste. In terms of NH3 control, it is better to compost kitchen waste and agricultural waste independently.
A Study on Permeabilities and Selectivities of Small-Molecule Gases for Composite Ionic Liquid and Polymer Membranes
Authors: Liang Li Zhe , Gan Quan , Nancarrow Paul
Published: October 2013

In recent years, the utilisation of ionic liquids supported on porous polymer membranes has been demonstrated to enhance gas separation performance by improving both permeability and selectivity for several industrially-relevant gas mixtures. However, the use of such supported ionic liquid membranes (SILMs) is normally not feasible at elevated process temperatures due to the resulting decrease in ionic liquid viscosity, which can lead to increased loss of ionic liquid from the membrane support during operation. In addition, many of the polymer membranes typically used in SILMs exhibit relatively poor mechanical and thermal stabilities at high temperatures. To overcome these problems associated with SILMs, thermally-stable composite ionic liquid and polymer membranes (CILPMs) have been fabricated in this study, thus exploiting the beneficial properties of ionic liquids for gas separation at elevated temperatures. Poly (pyromellitimide-co-4,4-oxydianiline) (PMDA-ODA PI) in combination with the ionic liquid, [C4mi [NTf2] were used to fabricate the CILPMs. A measurement rig was designed and built to determine permeabilities and selectivities of the CILPMs for H2, N2, CO, CO2 and CH4 over a range of pressures and temperatures. The fabricated CILPMs were shown to maintain excellent mechanical and thermal stability over a wide range of processing conditions. Temperature was shown to greatly affect both permeability and selectivity of the membranes, whilst pressure had less influence. The incorporation of [C4mi [NTf2] into the membranes was found to significantly increase CO2 permeation and, therefore, it is anticipated that these CILPMs hold significant potential for CO2 separation applications.
Study on the Equity of He’nan Resource-Environment Based on Ecological Capacity
Authors: Li Qing Song , Deng Su Jun , Song Wen Bo , Meng Qing Xiang , Zhao Jing Ying
Published: October 2013

The article made quantitative analysis of the fairness of resources environment 2007-2011 of He‘nan Province based on ecological capacity. The results show that (1) in recent 5years, the Gini Coefficient of the indicators based on ecological capacity is: solid waste>industrial waste gas>energy consumption>industrial waste water. And the Gini Coefficient of the first 3 is all > 0.4 which exceeds the international security level. There are great equity in solid waste, waste gas emission and energy consumption etc in the cities and areas of Henan province; (2) the 4 ecological load coefficient of Zhengzhou, Luoyang, Pingdingshan, Anyang, Hebi, Jiaozuo, Sanmenxia and Jiyuan are all>1. These cities and areas are the factors which caused the inequity of the energy consumption and pollutant emissions of Henan Province; (3) the inequity of the entire energy consumption and pollutant emissions of Henan Province are affected by the industrial spatial distributions. Equity and efficiency should be both considered and it should lay emphasis on the coordinated development of ecological economics.
Microwave-Enhanced Fenton-Like System, Fe3O4/H2O2 for Rhodamine B Wastewater Degradation
Authors: Yan Peng , Gao Lin Bo , Li Wei Tao
Published: October 2013

Fenton reactions have been increasingly applied to emergent pollutants degradation. Although homogeneous reaction by classical Fenton enables organic wastewater degradation, long treatment time and high iron catalyst concentrations are needed, raising environmental concerns. This paper proposed an innovative and cheap solution to degrade Rhodamine B (RmB) by combining magnetic nanomaterials of Fe3O4as the catalyst with microwave-enhanced fenton-like system. The main operational parameters were optimized systematically (hydrogen peroxide concentration; Fe3O4dosage; catalyst cycles; reaction time and reaction temperature). The degradation rate of Rhodamine B was increased and accelerated due to the assistance of microwave irradiation, with value of 99% after heated for only 5 min, even higher than that of treated by traditional Fenton process for 20 min. Moreover, six cyclic tests for Rhodamine B degradation showed that the magnetic catalyst was very stable, recoverable, highly active, and easy to separate using an external magnet. Hence, microwave-enhanced Fenton-like system with magnetic nanomaterials of Fe3O4as the catalyst has potential use in organic pollutant removal.
Building the Optimization Model for Preservation-Exploration of Geoheritage Landscape Resources in Xinjiang
Authors: Li Cui Lin
Published: October 2013

This paper analyzes the degree of development and the status quo in the process of preservation-exploration of geoheritage landscape resources in Xinjiang in order to define the present model of protection and exploitation. The development pattern and the management pattern for geoheritage landscape resources are believed to be optimized respectively under the perspective of protection and benefit sharing. Based on this idea, this paper points out that the optimization pattern for preservation-exploration of geoheritage landscape resource in Xinjiang is a double-winged optimized pattern for it is the perfect mixture of exploration optimization model from preservation perspective and management optimization pattern from interest sharing perspective.
Study on Noble Metal Catalyst for Selective Catalytic Reduction of NOx at Low Temperature
Authors: Gou Xiang , Zhang Kai , Liu Lian Sheng , Liu Wen Yong , Wang Zi Fang , Yang Guang , Wu Jin Xiang , Wang En Yu
Published: October 2013

The method of selective catalytic reduction (SCR) to removal NOx is very mature. However, its initial investment and operation cost are still high, which limits the development of SCR technology. Low temperature SCR catalysts can significantly reduce the cost. Catalyst active component and its carrier is the key to the efficiency of denitration. This paper summarizes the research progress of noble metal catalyst of low temperature SCR.
A Preliminary Study on the Relationship between Vegetation Cover and Regional Climate Change in Jiangsu Area of China
Authors: Yang Yan Rong , Kong Zhe , Liu Chun Ming
Published: October 2013

The relationship between vegetation cover and climate change is one of the most important research fields in global change. Herein Jiangsu province and thereabout in China is chosen to be the research field. Under the support of observations from normalized differential vegetation index (NDVI) during years from 1998 to 2008 and corresponding benchmark weather stations, the relationship between vegetation and climate change had been analyzed combined with simulations from regional climate model RegCM3, in perspectives of point vegetation cover amount and area vegetation cover type respectively. Conclusions are: (1) Points observations showed that NDVI had positive correlation with annual total precipitation and negative correlation with annual average temperature. (2) Area simulations showed that two different vegetation types in south and north Jiangsu almost had same 8warming value, but the incremental annual precipitation amount is more significant in south Jiangsu.
Modeling the Potential Geographic Distribution of the Madeira Mealybug Phenacoccus madeirensis in Hainan Using GIS Tools
Authors: Lu Hui , Lu Fu Ping , Xu Xue Lian , Chen Qing
Published: October 2013

The Madeira mealybug (Phenacoccus madeirensis Green) is one of the main pests in the world and the risk of invasion posed by this pest is becoming more and more serious with regard to increasing areas of planting cassava in Hainan province, China. It is urgent to analyze the potential geography distribution of P. madeirensisamong cassava in Hainan. The environmental suitability of P. madeirensis in Hainan was studied in this paper using Maxent and ArcGIS, based on the biological data and known distribution of P. madeirensiss. The results showed that there were 4 levels of suitability assessment of P. madeirensis in Hainan. The prediction showed P. madeirensismainly distributed in west and south Hainan, especially in Danzhou, Lingao, Chengmai, Dongfang, Ledong and Sanya cities or counties. The potential geographic distribution of P. madeirensis in Hainan defined in this paper constructed the theory basis and technical support for scientifically forming of control measures for P. madeirensis in Hainan.
Study on Soil Seed Bank in Urban Abandoned Land of Tianjin — Take Houtai Wetland for Example
Authors: He Meng Xuan , Li Hong Yuan , Li Lan Lan , Wang Fang
Published: October 2013

Urban abandoned lands play an important role to maintain urban biodiversity. In order to study the characteristics of soil seed bank (SSB) in Houtai Wetland, field survey and laboratory experiment were conducted. After germination test, the results show that the species richness is relatively low, only 12 kinds of species are contained, but the reserves of SSB are abundant. Its density reaches to7.27×105grains/m2, maintaining the same level with coastal wetlands. Glycine soja account for the vast majority of proportion, leading to uneven distribution within species.So the Shannon-Wiener Diversity Index, Simpson Index and Pielou Evenness Index are all lower than ground vegetation.The Sorensen Similarity Index is 0.330, its ability to reproduce ground plants is limited. The suggestions are that appropriate manners should be taken to protect native plants and soil seed bank.
Synthesized Weight Method for Classification of Main Rivers in China
Authors: Cui Ting Ting , Wang Yin Tang , Liu Ke Lin , Wang Zong Zhi
Published: October 2013

Reasonably determine the weights of the various classification systems is important.to the rationality and stability of river classification results in the river classification process. In order to fully exploit the sample data information, reasonably determine the various classification index proportion, in order to fully exploit the river sample data changes of extraction index information use fuzzy analytical hierarchy process and projection pursuit method, reasonably determine the various classification index proportion, thus reflects the weight of each index factor, overall, the two methods to get the weight of each index classification combination sure rivers of combination weights. The results showed that determine the combined weight of river classification is objective and reasonable, river classification results accord with people understanding in the long river habit, the result is reasonable.
Modeling the Recovery of the Spring Flow and Groundwater Level in a Depleted Karst Aquifer - A Case Study of the Jinci Spring
Authors: Long Yu Qiao , Li Wei , Lu Wen Xi , Cui Ting Ting
Published: October 2013

A reservoir model is developed to characterize the functioning of the karst aquifer of the Jinci Spring. It is based on the relationship of the groundwater storage deficit and the groundwater level. The relationship is derived from the monitoring data of the aquifer. The model is verified with the monitoring data (1981-2006) and is used to predict the recovery of the Jinci Spring flow and the groundwater level in the aquifer under three exploitation schemes with the future rainfall data provided by the National Climate Center (NCC). The results show that the Jinci Spring will flow out again before 2050 under Scheme I and II. The Xuan Spring will flow out earlier than the Jinci Spring. However, both of the two springs cannot spout under Scheme III. The model takes account of the artificial recharge, pumping and coal mine drainage, and can simulate the spring discharge, karst groundwater level and the storage deficit accurately at an annual time scale. The model is suitable for macroscopic groundwater management.
Fluorescent Sensors for Mg(II) Based on Phthalocyanine PcOC8
Authors: Wang Li Hua
Published: October 2013

A chemosensor was designed, and its sensing behavior toward metal ions was investigated by fluorescence spectroscopies. The fluorescence measurements indicated that the PcOC8 has excellent fluorescence emission in methanol solution, and the intensity of fluorescence emission was enhanced by adding Mg (II) ion, whereas other ions including Zn (II), Ba (II), Ca (II), Ni (II), Co (II), Cd (II), Cr (II), Fe (III), Pb (II), Cu (II), and K(I) could quench the intensity of fluorescence emission, which constituted a Mg (II)-selective fluorescent chemosensor.
Study of the Kinematics for the Serial Robot on the Controllable Polishing Force
Authors: Yu Miao , An Xin
Published: October 2013

This paper puts forward a multi-robot system which is made up of the MOTOMAN - HP3 serial robot and NPT800 parallel robot. Based on the mechanics model and dynamics equations that are established of the robot, the mechanical characteristics of the end for the grinding are analyzed. By applying the constant load and the functional load on the polishing end, the force and torque diagram for each of the robot arm joint are obtained. In the end, the conclusion that the force and the torque of the first joint is the largest can be obtained and the force of joint can keep the good constancy.
Numerical Analysis of Stratified Rock Slope Stability Based on 3DEC
Authors: Wang Zhi De , Jiang Li Min , Xia Yuan You , Pei Yao Yao , Lin Man Qing
Published: October 2013

Discrete element software is used to simulate the excavation of a rock slope in Puli-Xuanwei Expressway in Yunnan Province. Through monitoring displacement development characteristics in different positions of slope, the result shows that the minimum horizontal displacement under excavation exists in the top of the slope, meanwhile the maximum horizontal displacement occurs in the foot and waist of the slope, and the maximum vertical displacement occurs in the top of the slope. Comparing rock slope in such conditions as different stratum angles, directions, rock characteristics and thickness, it concludes possible failure modes of slope and the variation law of safety coefficient under different conditions. This paper is instructive and offers reference for the practical engineering.
The Application of Improved Efficiency Coefficient Method in Debris Flow Warning with Rock Technology in Civil Engineering
Authors: Hu Xiang , Huang Guo Yong
Published: October 2013

To solve the problem of inaccurate prediction of debris flow in dangerous rock technology, introducing combination weighting method to improve the accuracy. Calculate the weight of each impact factors by using improved AHP (analytical hierarchy process) and entropy method. Then use combination weighting method to put the two sets of weight into a new weight. Finally apply efficacy coefficient method quantitative assessment the risk of the debris flow. The instance results show: using Efficacy Coefficient method that combined the Combination Weighting method can reflect the actual situation of debris flows, and have better effect than using entropy method. And it provides an idea of the method on disaster prevention and mitigation and dangerous rock technology.
The Research and Design of Intelligent Battery Charger for Electric Vehicle
Authors: Zhao Ying , Hou En Zhen , Fang Xu
Published: October 2013

Battery charging is the most substantial issue in battery management systems, and the intelligent charger can provide stable and reliable energy conversion to electric vehicles. So the research of high power intelligent battery charger becomes very important. This paper introduces the main concept of battery charging of an electric vehicle, and studies the working principle and hardware scheme of an intelligent charging system, and researches the material performance. And based on research results, we will propose desirable characteristics of charger for public use.
Durability Evaluation of Concrete Structure Based on Fuzzy Extension AHP
Authors: Zhang Ya Na , Liu Yan
Published: October 2013

In the paper, Fuzzy extension AHP(Analytic Hierarchy Process) model is proposed to evaluate concrete structure durability, according to the concrete durability indexes are multiple-levels, multiple-factors and fuzzy. In the method, the extension interval judgment matrix is applied to calculated the weight of every durability index, at the same time the fuzzy comprehensive evaluation method is used which can obtain every evaluate grade level by level, therefore the ultimate evaluation result is obtained. The fuzzy extension AHP method is applied in the office building of the third rolling mill of Ma'anshan steel company. The analysis result shows that the fuzzy extension AHP method is more scientific, comprehensive, accurate and convenient than the traditional AHP method, which can evaluate the durability of concrete structure effectively.
The Strength Analysis of Bolts Used for Paraboloid Antenna under Wind-Load
Authors: Zhang Jin , Chen Xing Yan , Jiang Yan
Published: October 2013

Stress analysis of the bolts used for Φ1.3m parabolic antenna was conducted in this article, and the strength of bolts was checked, the results indicated that the bolts can meet the strength requirements. This calculation result was verified by the static load experimental test of Φ1.3m parabolic antenna, and the experiment results agreed well with the calculation results. The calculation and verification methods provided a reference for the structure design and bolts strength check of the same type of antenna.
Shape Memory Alloy Materials and Exercise-Induced Bone Injury
Authors: Zhou Jian Wei , Hou Jiang Yuan , Shi Yong Tao
Published: October 2013

Shape memory materials are materials with special functions set of sensing and actuation in one. The shape memory alloy is one of the most important materials in shape memory materials. Shape memory alloy is a kind of alloy that alloy with initial shape in low temperature by the plastic deformation and fixed into another shape, by heating to a temperature above the critical, can be restored into the initial shape. The characteristic of shape memory alloy mainly has the shape memory effect and super elastic effect. Nickel titanium memory alloy is not used in the fracture of limbs, in recent years are also used in the spine and femoral head fracture. Nickel titanium memory alloy has good biocompatibility, and has the characteristics of super elasticity, low magnetic, wear resistance, fatigue resistance, corrosion resistance, as a novel material for internal fixation in the treatment of sports injuries are widely used.
Experimental Study on Convection Heat Transfer Characteristics of Magnetic Nano-Refrigerant
Authors: Wu Zhi Jiang , Yin Shao You
Published: October 2013

An experimental system of Fe3O4-R600a magnetic nanofluid on thermo-magnetic convection characteristics of a cooling device using magnetic nanorefrigerant was prsented. The influences of magnetic field distribution and intensity, cooling temperature, heat load were discussed. The experimental results show that the heat was transferred obviously by the circulating fluid with the absence of a pump. The synergic function between the external magnetic field and the thermal field has impact on the velocity of the working fluid and the cooling performance of the device.
Comparison and Research of Thermocouple Measuring Temperature Curve and Theoretical Temperature Curve in Grinding
Authors: Li Rong Bin , Cui Can
Published: October 2013

A Thermocoupletemperature measurement test of grinding for steel 45 was done to analyse thereason of errors between experimental temperature curve and theoreticaltemperature curve derived by triangular distribution heat source model.It wasshown that,errors of influencing factors,such as grinding heat flow,thermalconductivity,density,specific heat capacity,limited grinding energy andeffective abrasive contact radius,have certain effect on temperature measuredby thermocouple.It was found that the influence of grinding heat flow into aworkpiece is the biggest and the effective radius of abrasive contact thesmallest.It is concluded that as long as the error of each influencing factoris controlled in a certain range,thermocouple measuring temperature curve willmatch with theoretical temperature curve closely.
The Rotation Speed Control of DC Servo Motor Based on Fuzzy-PI Dual Mode
Authors: Yang Yang , Chen Yan , Sun Hao , Huang Jin
Published: October 2013

The PID control algorithm is simple. But when it controls DC servo motor of nonlinearity, delay and strongly couple, its dynamic control performance is poor. Fuzzy control which is essentially equivalent to a nonlinear PD control has poor steady state performance. Fuzzy-PI dual-mode control simultaneously has PID control's steady-state performance and fuzzy control's dynamic performance. The step response simulation results shows that Fuzzy-PI controls rise time is 8sec and that the overshoot and steady-state error are close to 0. It has stronger anti-interference ability, higher dynamic performance and higher steady state performance.
Temperature Measurement Algorithm Research of Boiler Furnace Based on BP Network
Authors: Liu Jiao Yue , Yang Ju Qing , Shi Ya Bei
Published: October 2013

The measurement principle of furnace temperature field based on flame radiation image is analysed, nonlinear optimization mathematical model aiming at measurement objects is established, a temperature field measurement algorithm based on BP neural network is put forward. It can draw the furnace temperature field distribution by constructing the BP neural network, inputting image sample, outputting temperature sample and choosing appropriate sample training network. In the end, the measurement accuracy can be effectively improved and there is sure to be a good application prospect.
Study on Mechanical Engineering for Flight with Flight Safety Evaluation Method on Relevance Vector Machine
Authors: Gan Xu Sheng , Cui Hao Lin , Wu Ya Rong
Published: October 2013

The mechanical engineering for flight are important for flight safety to prevent the flight accident, improve the management and decision-making level of flight safety. In order to improve the safety of flight system, a flight safety evaluation method based on relevance vector machine and flight mechanical engineering is proposed. First, based on system viewpoint, according to the actual situation of flight safety, the factors that influence the safety of flight system are found out on four sides of human, flight mechanical engineering, environment and management and the flight safety evaluation index system is constructed; then the flight safety evaluation model based on relevance vector machine developed in the framework of Bayesian theory is briefly introduced; finally using the index system the relevance vector machine evaluation model of flight safety is establish. The actual example confirms its feasibility.
Study on Mechanical Properties for Modeling and Simulation of Microneedles for Medical Applications
Authors: Li Yan , Zhang Pei Yu
Published: October 2013

A MEMS Microneedle Array was modeled, designed and simulated. The mechanical properties of the microneedle structure were theoretically analyzed including analysis of fracture strength and distribution of von mises stress. The conditions of initial insertion and after initial insertion were considered. The detail linear and nonlinear buckling analyses on needle structure were also presented. Two modes of buckling were come to and discussed. The fabrication of microneedle array was simulated by employing Intellisuate and bi-mask technique. The microneedle array can be used in microsystem for in-vivo fluid sampling and drug delivery.
Extended NGM (1,1,K) Model and its Application to Spectral Prediction of Military Launch Vehicle Hydraulic System
Authors: Wang Hai Tao , Gong Lie Hang , Zhao Wei , Zhao Hong Fei
Published: October 2013

The extended NGM (1,1,K) grey forecasting model had the defined type and white type mismatching problem. It proposed the extended NGM (1,1,K) model to eliminate the inherent bias caused by mismatch, the model also had given the prediction formula. Compared to the GM (1,1) model, the extended NGM (1,1,K) model had higher fitting and forecasting accuracy. The model was applied to spectrum prediction of Fe concentration of the oil in a certain type of military launch vehicle hydraulic system, it could determine the working status of the hydraulic system effectively combined with Fe concentration thresholds, the result show that the model is effective.
Research on Dynamic Characteristics of Globoidal Cam Employed in Automatic Tool Changer (ATC) of Machine Center
Authors: Gong Qing Shan , Luo Min , Ren Ai Hua , Chang Zhi Bin
Published: October 2013

Globoidal Cam Indexing Mechanisms are used extensively as automatic tool changers (ATC) of machining centres or as indexing mechanisms in various machinery.By applying the theory of conjugate surface , the model for the surface design of the Globoidal Cam Indexing Mechanism of ATC is developed with MathCAD and Pro/E. The dynamic simulation of the me
Characteristics Analysis of the Automobile with Negative Stiffness Suspension
Authors: Qu Xiao Zhen , Hou Guang Quan , Liu Hao , He Hui
Published: October 2013

One new negative stiffness suspension is introduced in this paper. The vehicle with negative stiffness suspension has good ride comfort and handling stability. The natural frequency of system could be reduced in vertical direction by applying negative stiffness suspension. The vehicle model with negative stiffness suspension or not is built in ADAMS. The comparison of simulation results show that the vehicle with negative stiffness suspension could reduce the natural frequency of system and vibration transmissibility, and also improve the vehicle ride comfort and vehicle handling stability.
Calculation and Analysis of Submersible Well Pump Clearance Leakage Loss
Authors: Gao Xiong Fa , Shi Wei Dong , Zhang Qi Hua , Zhang De Sheng
Published: October 2013

The 200QJ80-22 submersible well pump was investigated to predict the effects of leakage change of the submersible well pump on external characteristics. The integral model of impeller, guide vane and wear-ring was established and the numerical simulation for three-dimensional whole flow field was carried out. The results show that the predicted results have a good agreement with the experimental data. The result of the numerical simulation shows that the head and efficiency of pump decrease with the size of clearance increasing. Especially when the size of clearance is larger than 0.7 mm, the decreasing becomes more obvious. The leakage calculated through numerical simulation were compared with the values obtained according to empirical formula and the results indicates internal clearance leakage at design point is close to the value calculated through empirical formula in smaller wear-ring clearance, but the simulated values of leakage have a small gap with calculated value obtained from empirical formula. Simultaneously, the Second stage leakage decrease significantly compared to the first stage leakage with the flow rate increasing, while the values got by the empirical formula have a small gap with simulated values obtained.
Application Research on High-Tech Tax Preference Policy of Manufacturing
Authors: Cui Shu Fen , Du Min , Li Zhi Xuan
Published: October 2013

This paper discusses the application research on high-tech tax preference policy of manufacturing. Analyzing high-tech tax preference policy of the current manufacturing;The disadvantages of high-tech tax preference policy in production manufacturing;Suggestions for further implementing the high-tech tax preference policy of manufacturing.
Dynamics of Flexible Slider-Crank Mechanism Based on the Floating Frame Reference Formulation
Authors: Sun Wei Fang , Zheng Xiang Zhou , Liang Jing Rui
Published: October 2013

The slider-crank mechanism is a special case of the four bar linkage which is widely used in reciprocating machines. Flexible multi-body mechanisms that gain some motion through the deflection of flexible elements are classified as compliant mechanisms. Dynamics of flexible slider-crank mechanisms is presented in this paper. Both rigid and flexible parts are included in the slider-crank mechanisms. As one of the widely accepted dynamic analytical method for the multi-body system modeling, floating frame reference formulation has been applied to derive dynamic formulations. Simulations of dynamics of flexible slider-crank mechanisms have been carried out using Matlab. It was shown that flexibility of parts has a certain extent effects on mechanical properties of flexible system that disagree with that of rigid ones. Keywords: Floating frame reference formulation; Slider-crank; Deformation; Flexible multi-body
Comparative Study on the Wear Behavior of FPM and NBR in the Natural Crude Oil Medium
Authors: Wang Zhe , Wang Shi Jie
Published: October 2013

The wear behavior of stator rubber in the natural medium of crude oil in oil-drilling screw pumps directly matters to its service life and sealing property. The premature failure of stator rubber is the main cause for the shortening life of screw pumps. In order to study the wear mechanism of NBR and FPM, a friction wear test was conducted at room temperature by using a MPV-600 micro-computer-controlling grain-abrasion testing machine, in which NBR, FPM and 45# steal pair are the testing subjects. SEM was afterwards employed to observe the surface topography before and after the rubber wear. The test result shows that at the constant low load, the wear extent of FPM increases in a stable, linear way when the rotor rotating speed increases, and the wear extent of NBR increases with the increasing speed of the rotor rotating speed. However, when the rotating speed is over 400r/min, the wear extent of NBR decreases instead. This might be attributed to the improvement of the local lubrication state on the friction surface. Much consistence is indicated in the changing rule of the friction coefficient of the two types of rubber and the changing wear extent with the rotating speed. At the constant, low rotating speed, the wear extent of NBR and FPM basically increases linearly, while the friction coefficient of NBR, FPM and steel pair decreases with the increasing load.
Current Control Type Power Distribution Algorithm of Indirect Fuel Cell Hybrid Vehicle
Authors: Xiao Peng , Quan Shu Hai
Published: October 2013

An indirect fuel cell hybrid vehicle test bench is established for validating the control algorithm. The fuel cell output voltage is boosted through DC / DC converter. DC / DC converter positive and negative outputs are respectively connected with lithium battery sets positive and negative outputs. DC/DC converter output current and output power are regulated by the DC/DC converter main controller via CAN bus. So the fuel cell output power is regulated. Different fuel cell output power and motor input power proportional coefficient is adopted according to different lithium battery sets SOC (state of charge). The power distribution algorithm between fuel cell and Lithium battery sets is validated in tests.
Influence of Pearlite Interlamellar Spacing on the Deformation Behavior and Fracture Characteristics in Spring Steel 60Si2MnA
Authors: Zhang Chao Lei , Liu Ya Zheng , Zhou Le Yu
Published: October 2013

Specific features of plastic deformation and tensile failure of a spring steel with systematically various pearlite fineness obtained by isothermal transformation have been investigated by uniaxial tensile tests and electron microscopes. The results indicated that pearlite interlamellar spacing has an important influence on that. The tensile fracture surface is consisted of the center plastic fracture region and the edge brittle fracture region while the interlamellar spacing is within the range 140-280nm, and is a completely brittle fracture and no necking with the further increase in interlamellar spacing to 510 nm. The deformation characteristics of pearlite in the neck regions is mainly including S-shape bend, rotation and shearing. And the data obtained suggest that the interlamellar spacing within 140-280nm can ensure the plasticity for the steel.
Recent Development of Vacancy Formation Energy
Authors: Yu Xiao Hua , Zhan Zhao Lin , Rong Ju , Wang Yuan
Published: October 2013

Vacancies of the crystal is one of the core issues in solid physics, solid state chemistry, metallurgy and materials science. In this paper, we present the latest research on the vacancy formation energy and size dependence of vacancy formation energy. According to the vacancy formation energy of common methods and common description of the vacancy formation energy theory, the vcancy formation energy characterization, calculation and simulation methods are described; the nature and origin of the vacancy in nanoscale is analyzed. finally, further research will focus on the properties mechanisms of the other physical properties, mechanical properties and thermodynamic in materials.
Thermodynamic Properties of Nb4AlC3
Authors: Ding Ai Ling , Yu Wen Bin , Li Chun Mei , Chen Zhi Qian
Published: October 2013

We use ab initio plane-wave pseudopotential density functional theory method within local density approximation (LDA) to investigate the thermodynamic properties of Nb4AlC3 under high pressure (0-100 GPa) and high temperature (0-3000 K). Through the quasi-harmonic Debye model, we investigate the thermodynamic properties of Nb4AlC3.The variation of the relative volume, bulk modulus, entropy parameter S, the thermal expansion coefficient α , the heat capacity and the Gruneisen parameter γ with pressure P and temperature T, and many other thermodynamic parameters of Nb4AlC3 are obtained systematically. The bulk modulus of Nb4AlC3 is 250 GPa under zero temperature and zero pressure.