bluuebunny/crossref_metadata_2025 huggingface dataset:
Group Decision Making Model under Risk Based on Bounded Rationality
Authors: Du Yuan Wei , Duan Wan Chun , Han Chen
Published: February 2012

To overcome the shortcomings in traditional approaches such as bad satisfaction, bad effectiveness and so on, three key bounded rationality assumptions are proposed firstly, i.e., risky preference is invariable, decision cost is existing, and group cognitive ability is only unbounded rational. After that, an efficient prospect deriving model is presented by data envelopment analysis with assurance region to derive efficient alternatives from inadequate decision information. The presented model is able to reflect the subjective risky preferences of group members and derive efficient alternatives under the premise of existing acquisition costs, and thus it can make the satisfactory and effective decision.
The Hot Deformation Behavior and Microstructural Evolution of Ti-6Al-2Zr-3Ni Alloy
Authors: Xiao Xuan , Xu Hui , Sheng Li Yuan , Zhou Lan Zhang
Published: February 2012

Hot compression deformation behavior of Ti-6Al-2Zr-3Ni alloy was investigated through thermal simulation tests in the range of 900- 1050°C, with strain rate from 0.001 s-1 to 1 s-1. The results demonstrates that flow stress reaches the maximum quickily, followed by flow softening with the increase of strain in all true stress-strain curves. At a constant strain rate, flow stress will decrease with the test temperature. Moreover, the temperature sensitivity of flow stress reduces largely at temperature between 980 to 1050°C, during which dynamic recovery is the main mechanism for the hot deformed alloy. In addition, flow stress increases with the strain rate. At lower temperature, recrystallization reduces or vanishes at temperature ranging from 900 to 940 °C due to thermodynamics factors.
A Study on Dissipative Structure Model of Enterprise Low-Carbon Competitiveness System
Authors: Yuan Xiao Liang , Xu Jian Zhong
Published: February 2012

In low-carbon economy era, enterprise competitive is not only traditional competition in the labor market, but also is the competition in low-carbon productivity, low-carbon competitiveness will becoming the important indication for measure national and regional competition. This paper defines the definition of low-carbon competitiveness and the effect entropy factors. It proves process of enterprise low-carbon competitiveness starting from scratch combined the dissipative structure and enterprise low-carbon competitiveness, analysises how to develop enterprise low-carbon competitive in essence, puts forward effective fingerpost and a new view for enterprise to judge if the low-carbon competitiveness exist and make right decisions. Introduction
The Morphology Analysis of Axial Creep-Feed Grinding about Engineering Ceramics with a Small Grinding Wheel
Authors: Guo Fang , Tian Xin Li , Wang Jian Quan , Tang Xiu Jian , Mao Ya Tao , Li Fu Qiang
Published: February 2012

The plastic deformation and brittle fracture damage remained within a certain depth of the abrasive surface of ceramic materials during axial creep feed grinding process, which included much information about damage mechanism and removal mechanism of ceramic materials. The surface morphology analysis showed that the brittle fracture was the main removal mode of grinding surface in addition to some micro-cracks in the affected layer, and cracks were not found in the matrix. Compared with general grinding, only the surface deterioration layer is thicker than general grinding surface, and there is no obvious damage to the workpiece
Texture Evolution in Non-Oriented Silicon Steel Processed by Twin-Roll Casting
Authors: Pei Wei , Sha Yu Hui , Zhang Fang , Zuo Liang
Published: February 2012

In this paper, non-silicon steel sheets were produced by both twin-roll casting method and conventional process. Orientation characteristics and texture evolution of the sheets during casting, cold rolling and recrystallization annealing were investigated for comparison. It was found that the subsurface of twin-roll casting strips are characterized by weak {100} orientation while the central layer by random orientation. Twin-roll casting process can decrease α fiber (//RD) and increase γ fiber (//ND) during cold rolling process. Consequently, the η fiber (//RD) favorable for magnetic properties of non-silicon steels is enhanced and the detrimental {111} component is suppressed after annealing.
Research of Small and Medium-Sized Enterprises Performance Evaluation System Based on ERP
Authors: Wei Yao Wu
Published: February 2012

ERP (Enterprise Resource Planning) is a kind of advanced management method and ideological system, which is an effective tool to improve operating efficiency. In reference to the domestic and foreign relevant research results, this paper attempts to find a set of evaluation index system and method, which is suitable for small and medium-sized enterprises in China implementing ERP system performance evaluation according to characteristics. Then use AHP to determine each index weight and evaluate comprehensively ERP implementation performance of small and medium-sized enterprise employing the fuzzy comprehensive evaluation method. This can provide ERP project methodological guidance and help enterprise to carry out the scientific decision, improve the success rate of ERP implementation, and promote the process of ERP in our country popularity.
Research on the Equipment Maintenance Tasks Scheduling Optimization Problem Based on GA
Authors: Ma Yi , Lu Yu , Chen Li Yun , Gu Ping
Published: February 2012

Scientific maintenance tasks scheduling can improve maintenance effectiveness greatly. Aiming for the shortage of the research on the equipment maintenance tasks scheduling optimization (EMTSO) problem, this paper proposes a new method based on GA. The detail is as follows: Make the optimization model of the EMTSO problem by analyzing the characteristics of maintenance tasks scheduling systemically. Aiming for the NP hard characteristic of the problem, design the genetic algorithm to solve it. Finally, use the instance to validate the method. The result reflects that the method proposed by this paper can solve the equipment maintenance tasks scheduling optimization problem, and it has good applicable value in the military domain.
Study on Virtual Construction Mode (VCM) in Large-Scale Engineering
Authors: Zhang Li Mao , Chen Hong Yu , Wu Xian Guo
Published: February 2012

In recent years, following with the development trend of large-scale and complexity in engineering, project management has been more and more difficult, both in China and abroad. Virtual Construction Mode (VCM), the modification and optimization of traditional project management mode, meets the needs for the current large-scale engineering management. With the strong support of Virtual Organization (VO) and Vitrual Technology (VT), VCM has the capacity to promote multi-party coordination, resource conservation, as well as scheme prioritization and so on.
A Hierarchical Facial Feature Extraction Method for Expression Recognition
Authors: Han Jin Lin , Zhang Hong
Published: February 2012

With the development of computer visual technology, facial expression recognition plays an important role in the friendly and harmonious human-computer interaction field.Against the inadequacy of the original feature extraction method based on singular value decomposition, this paper proposed a hierarchical facial feature extraction method according to the needs of facial expression recognition, which combines the way of hierarchy and block to enhance the detail information of the image. Then utilize a combination of support vector machine to classify. The results of the two experiments show that the method is effective for the facial identity and expression recognition.
Research on Synchronized Cooling Hot Forming Process of 6016 Aluminum Alloy
Authors: Chen Ming He , Cao Y.Y. , Chen W. , Chen Guo Liang
Published: February 2012

In order to improve formability of high strength Al-alloy sheet metal, in this paper, it come up with the synchronized cooling hot forming process. Taking the aluminum alloy of 6016 H18 aluminum alloy, which carried out its technology test by Gleeble3500 hot-mechanical simulator. The process parameters such as deformation temperature T, holding time t and cooling rate v is investigated by the orthogonal test and the microstructure is analyzed simultaneously. The results show that the synchronized cooling hot forming process can be applied to 6016 H18 aluminum alloy, it both improves the formability of 6016 H18 aluminum alloy significantly and obtains the high strength after forming, it can meet the purpose of implementing deformation and enhanced in one process step, the proper combination of process parameters are T=450 °C, t=210 s, v=60 °C/s. Strengthening mechanism is which there is a large number of strengthening phase precipitated from matrix in technology process, the strengthening phases are coarser and the dispersed uniformity is a bit worse compared with that of T4 state.
Evolution Analysis of Popularity of “Cloud Computing”: Using Co-Integration and Causality Test
Authors: Tan Si Qi , Guo Shu Hang , Ding Yan Chao
Published: February 2012

Under the innovation system integrated with production, teaching and researching, the evolution mechanism of knowledge theme becomes central point in academic fields. However, previous researches mostly focused on analyzing the tendency of academic achievements, didn’t bring the potential interaction between the production and researching into consideration. In this paper we will use the co-integration analysis and Granger causality test methods, which are prevalent in economics research, to study the evolution of specific knowledge theme – “Cloud computing”. Our main purpose is to reveal the evolution mechanism as well as general principle of popularity of one theme.
Study on Order Policies of Fresh Food Base on Safety Reliability
Authors: Zou Yi Feng , Xie Ru He
Published: February 2012

According to the characteristics of fresh food inventory management, an inventory model of fresh food is established based on the safety reliability of food cold chain logistics. Through solving the model and comparing the solutions, three important ordering policies of fresh food are gained. First, the greater the requirement of safety of fresh food is, the shorter its order cycle. Second, the higher the demand rate of fresh food is, the shorter its order cycle. Third, the better the condition of inventory is, the longer its order cycle.
Study on the Evolution of Railway Hub Logistics Spatial Network under Passenger Dedicated Line Conditions
Authors: Zou Yi Feng , Liu Ting , Xie Ru He
Published: February 2012

This article builds up nodes growth model based on weighted network and analyzes the evolution characteristics of railway hub logistics spatial network (LSN) under passenger dedicated line conditions. The results show that impelled by passenger dedicated line, the logistics amount of railway hub tends towards agglomeration and distributes more irregularly among stations; The network possesses convergence yet is unlikely forming a single center network because of the effect of the attractiveness of nodes and the weights of edges of railway hub LSN, but will split up into multi-center hierarchy network. It is also demonstrated by statistical data of logistics nodes of Guangzhou railway hub in one year pre-and-post-operation of Wuhan-Guangzhou passenger dedicated line.
Long-Term Stabilized Polymer – The Right Choice-Material for the Right Passive Integrated-Optical-Device-Application
Authors: Kwong Wing Ying
Published: February 2012

Polymer, a flexible material that can be engineered and long-term stabilized, is a promising material that is readily formed into planar waveguide structures in integrated-optical devices implemented in optical systems for (tele-)communications applications. First, the general required properties of a passive polymeric waveguide material operated at the telecommunication wavelength of 1.55 m are studied, followed by a discussion on how to engineer polymers to meet requirements of specific applications. Several engineered and tested polymers were chosen to evaluate against the ideal passive polymeric waveguide material.
An Hierarchical Electronic Voting Scheme
Authors: Zou Xiu Bin , Cui Yong Quan , Fu Cai
Published: February 2012

The author presents a hierarchical electronic voting shceme for numerous voters. In the scheme,The administrator can separate those voters into a number of districts and designate a administrator and ballot inspector to manage voting and check ballot in every district, respectively. The districts are not divided into some smaller ones until those districts are moderate in size. The hierarchical electronic voting scheme works efficiently and meets the requirement for general electronic voting scheme.
The Pressure of the Superhydrophobic Surface under Droplet Gravity
Authors: Hu De Zhi , Mi Bin Zhou , Zhang Xiao Chun , Kou Bing Jun
Published: February 2012

The paper started from the most basic physical law ‘Yang-Laplace equation’, combined with the invariably characteristics of the droplet volume in the Wetting process, established a novel Gravity Model. By numerical simulated, we found that the different of the internal hydrostatic pressure of droplet affected the droplet morphology directly. Otherwise, the paper studied importantly that the droplet gravity generated the pressure on the solid-liquid interface. When the contact angle is more than 172°, the droplet is non-stability in the Cassie states. Only the droplet can keep stability in the Wenzel states.
Strain Effect on Differential Phase Sensitivity in Two-Mode Fibers
Authors: Lu Xin , Bi Wei Hong , Ma Shuo , Zhang Yan Jun
Published: February 2012

The modular differential phase characteristics of elliptical core fiber (ECF) and high- birefringence photonic crystal fiber (HB-PCF) are presented. The results show that HB-PCF has a larger range of wavelengths for two-mode operating than ECF. And when the longitudinal strain is applied on the fiber, the modular propagation constant difference between and modes is the most important factor for differential phase sensitivity. With the wavelength increases, the differential phase sensitivity of ECF decreases whereas that of HB-PCF changes in opposite way. And HB-PCF is more sensitive to strain than ECF.
Research on Emergency Management of the Nuclear Waste Material Transportation Accidents
Authors: Yu Rong
Published: February 2012

In order to provide a high degree of safety, the transport of Nuclear waste material is highly closely regulated. However, the transportation accidents still happened overtime. Considering the high risk and huge disaster effects induced by the transportation accidents of the nuclear waste material, the emeregency management of the nuclear waste materrial transportation needs to be prepared in advance. The author introduced an improved emergency decision making system model, to integreate the relating department working efficiently together in this paper. This paper also briefly points out the emeregency rescue requirements and describes the development and implementation of emeregency management on the nuclear waste materrial transportation accidents.
Design and Research on E-Commerce-Oriented Dynamic Information Drive Model
Authors: Cheng Xu , Sun Fu Quan
Published: February 2012

It’s difficult for the traditional operation mode of enterprises to meet new market demands in the information era. The information relationship between various subjects is dynamically changing in the open network environment, the E-Commerce information exchange is highly dynamic, therefore, new resolutions must be sought. This paper starts from the perspective of dynamic information spreading, puts forward the E-Commerce integration and information technology drive hierarchical and structural model centered with the information flow, for the purpose of constructing E-Commerce into a seamless integrity, employs structural equation to transfer dynamic information into a measurable concept, so as to make dynamic information concrete and operable, and designs information drive model to play the role of precaution in E-Commerce operation.
Wear Performance of the Plasma Sprayed Fine WC-Co Composite Powders Coatings
Authors: Yang Lian Wei , Li Jin Hui , Dong Yun , Lin Xiao Ping
Published: February 2012

WC/Co; Composite coating; Plasma spraying; Friction and wear Abstract: WC- Co composite powders were synthesized by direct mechanical grinding in a rotary-vibration mill under 8h, and then analyzed by SEM and XRD. WC and WC/Co composite coatings were prepared by supersonic plasma spraying fine WC-Co composite powders. The wear and friction properties of both coatings were evaluated. The results showed that the wear resistance of the WC/Co composite coating was superior to that of the WC coating. The improvement in wear resistance of the WC/Co composite coating was attributed to its higher fracture toughness and adhesion strength as well as better thermal diffusivity. As for the WC/Co composite coating, the mechanism was mainly adhesion with micro-abrasion and fatigued-induced brittle fracture within splats, and the delamination along splat boundaries only occurred at high load. However, the failure of the WC coating was predominantly detachment of transferred film and brittle fracture within the splats and delamination along splat boundaries, which were enhanced with the increasing load.
Effect of Phytic Acid on Flotation of Talc Impurity
Authors: Wu Hao , Yin Wan Zhong , Liu Ming Bao , Tian Peng Jie
Published: February 2012

This study investigated the flotation in sodium dodecyl benzene sulfonate system, the effects of phytic acid on talc flotation mechanism, then proposed a new flowsheet to handle this kind talc ore, namely “one roughing-three cleaning-one scavenging’’. The closed-circle flotation test in laboratory can obtain a concentrate with the SiO2 and CaO grade of the concentrate is 61.87% and 0.60%, the SiO2 recovery is 72.59%, removal rate of tremolitei is 95.85%. This paper improved the economic value of the talc containing asbestos, laid the foundation of industrial applications.
Flotation Characteristics of Brucite and Serpentine
Authors: Sun Da Yong , Yin Wan Zhong , Zhu De Shan , Liu Ming Bao , Luo Xi Mei
Published: February 2012

In alkaline condition, experiments were taken to investigate the influence of different regulators on the flotation behaviors of brucite and serpentine when sodium oleate was the collector. The regulators used in experiments included sodium silicate, tannin and calcium lignosulphonate. The results showed that sodium silicate had a great effect on the flotation. When the regulator was the sodium silicate, serpentine recovery rate was less than 10% and brucite recovery was about 90% in the pH of 10. After analysis, brucite and serpentine may be separated effectively by sodium silicate. At last, the function mechanism of sodium silicate was probed. The electrostatic adhesion between serpentine and sodium silicate accured, and the surface of serpentine was negative so that it was difficult to be collected by sodium oleate; Instead, the impact of sodium silicate on brucite was weak, and the surface of brucite was still positive so that it could be collected easily.
Pilot Beneficiation about Deoxidized Samples of Bayan Obo Oxidized Iron Ore
Authors: Gao Peng , Han Yue Xin , Sun Yong Sheng , Mu Yu Fan
Published: February 2012

The composition of Deoxidized Samples of Bayan Obo Oxidized Iron Ore is complex with high content of residual reducing C, Fe phase in the RDP is ferrous metal what is hard and malleable resulting in pessimistic grindability. Gravity-magnetic separation process flow is adopted with C pre-rejecting, stage grinding (-0.074mm -57.18%, -0.074mm -85.66%) and coarse-fine fraction separate treatment base on RDP process characteristic. The final concentrate has 92.02% Fe with 93.27% Fe recovery, 94.18% Fe metallization which may utilize as rough materials for steelmaking and the final tailings has 15.10% REO with 97.15% REO recovery which may utilize as rough materials for REO concentration.
Separation Tests of Low-Grade Gold Ore with High Sulfur and Arsenic
Authors: Ma Ying Qiang , Luo Xi Mei , Yin Wan Zhong , Yao Jin , Liu Ming Bao , Hong Jong Su
Published: February 2012

With the rise of gold prices, a large amount of gold resources will be exploited, which leads to more and more refractory gold ore appeared. It has very important practical significance to accelerate the development of refractory gold resources. This paper has done the separation tests of low-grade gold ore with high sulfur and arsenic from Tianmashan, Tong Ling in China. The chemical elements component, mineral composition, and the dissemination of mineral and gold have been analyzed. The separation flowsheet tests have been explored, and the preliminary results and appropriate reagent regime have been obtained.
Study of the Beneficiation Technology for Low-Grade Bauxite
Authors: Wang Peng , Wei De Zhou
Published: February 2012

With the decreasing of aluminum/silicon ratio in bauxite, the original technical process make Ore dressing-Bayer process used for producing alumina lost competitiveness. In this experiment, the low-grade bauxite with A/S ratio of about 4 is used as raw material and its composition and dissemination characteristics are analyzed. The selective grinding study shows that the separation by the particle size classification is difficult to improve the A/S ratio of concentrate mineral. Through the flotation experiments, the technological condition for improving the A/S ratio of diaspore by direct--flotation was discussed; the technological and economic indicators of the different beneficiation process were also compared.
Study on Influence of Silicate Morphology Based on pH Value
Authors: He Yan , Liu Ya Jing , Cao Yong Lin , Zhou Li Xia
Published: February 2012

Infra-red absorption spectrometry, X-ray diffraction observations and characterization tests based on silicon molybdenum colorimetric method were used to investigate the optimal pH value controlling the stability of the silicic acid form. The experiment process was done by using sodium silicate as raw material. The results showed that the solution of silicate influenced the polymerization. The active silicic acid solution with a certain degree of polymerization was obtained by controlling the pH values.
Catalytic Oxidation of Toluene over CuyMnzOx/γ-Al2O3 Catalysts
Authors: Cao Xiao Qiang , Lv Xian Jun , Qiu Jun , Hu Shu Gang , Liu Sheng Rong , Huang Xue Min
Published: February 2012

Experimental investigations using granular activated carbon (GAC) adsorption and then desorpted with microwave irradiation for toluene abatement are reported in this paper. The results indicated that For different kinds of catalysts, Cu0.33Mn0.67Ox/γ-Al2O3 had the highest catalytic activity. For toluene combustion, the temperature required for 99% toluene conversion was lower than 300°C. In combination process of microwave desorption with catalytic combustion, the toluene conversion was ranged from 92% to 99% and the optimum volume flow rate ratio of carrier and air was 1:1.
Study on the Flame Retardant Property of Magnesium Hydroxide Whiskers/PE Composites
Authors: Jiang Yu Zhi , Zhang Li Li , Zhang Zhong Yang
Published: February 2012

The magnesium hydroxide (MH) whisker/PE composites were prepared by melt-extrusion with modified whiskers and unmodified whiskers as fillers respectively. The flame retardant property of composites was tested by the oxygen index machine. The magnesium hydroxide whiskers could improve the flame retardant property of the composites. When the contents of the modified and unmodified whiskers increased from 10% to 60%, the oxygen index of the composites increased from 24.4% to 43.4%, 23.2% to 40.2% respectively. The flame retardant of the modified whiskers/PE composites was better than the unmodified. The morphology of fracture was analyzed by SEM: the modified whisker could be more evenly divided into PE matrix with better dispersibility and compatibility, for that there occurred organic molecule membranes on the surface of the crystal whiskers after being modified, which lowered the interfacial energy of whiskers.
Study on the Transformation of (α+β) Phase to β Phase in Deformed Ti-6Al-4V Alloy during the Heat Treatment
Authors: Zhang Lu Ning , Zhao Hai Qiang , Sheng Li Yuan , Zhou Lan Zhang
Published: February 2012

In the present paper the Ti-6Al-4V alloy with α and β phases was deformed by hot rolling and solution heat treated at different temperature for 30 minutes to investigate the transformation of (α+β) to β. The results show that the deformed alloy possesses the typical (α+β) dual-phases microstructure, when the alloy is treated below the 950 °C. With the increase of the heat treatment temperature the volume of α phase decreases significantly. When the temperature is higher than the 970 °C, almost no α phase is left in the alloy.
Modeling of Thermal Effect of Chemical Reactions in Heap Bioleaching of Chalcopyrite
Authors: Zhang Zhen Yi , Inoue Chihiro , Kamiya Taro , Zhao Xuan
Published: February 2012

Heap bioleaching is regarded as an environmental-friendly technology to extract valuable metals, such as gold, silver, copper, etc., from low grade or waste ores. The chemical reactions accelerated by microorganisms are usually complex. Microbial activity is ascribed to the physiochemical factors such as temperature. Due to the variety of ore components, the thermal effect is difficult to elaborate. In this study, typical ores used for heap bioleaching of chalcopyrite are theoretically analyzed to explore the mechanism involving the thermal effect of chemical reactions. The thermal distribution is compared between different proportional combinations. The results show that biotite is the dominant contributor and should be verified carefully in the heap bioleaching of chalcopyrite.
Simulation-Based Analysis of Articulated Steer Grader with Six Motor-Driven Wheels
Authors: Shen Yan Hua , Zhang Tao Hua , Jin Chun
Published: February 2012

The dynamics performance of the articulated steer vehicle is investigated in this paper. This six-wheel drive hybrid articulated vehicle is believed to have good performance because these six motorized wheels can be controlled independently. The hybrid vehicle is modeled as multi-body system that considers the nonlinear vehicle dynamics, tyre models. The transient response of the vehicle, such as yaw angle, tire lateral force and the torques at the wheel are simulated. The effects of the torsional stiffness, the position of center mass on the behavior of vehicle are presented. The simulation results show that the vehicle can be adaptive to the different working conditions by controlling the driving motor torque.
Fuzzy Comprehensive Evaluation of Performance of the Natural Gas Driven Vuilleumier Cycle Heat Pump
Authors: Xie Ying Bai , Li Bing , Wang Shao Heng , Liu Yun
Published: February 2012

. In order to research the overall performance of the natural gas driven Vuilleumier (VM) cycle heat pump deeply, we adopt the fuzzy mathematical theory, the fuzzy comprehensive evaluation of performance of the natural gas driven VM cycle heat pump has been discussed in this paper from five aspects: technology, economy, safety, maintainability and environmental protection. Combine fuzzy comprehensive evaluation with performance study of the natural gas driven VM cycle heat pump; it is a effective way to improve scientific of the comprehensive evaluation and the reliability of the results.
Punching Teeth Layout on Steel Belt of the Box Based on Optimized Simulated Annealing Algorithm
Authors: Tian Wen Qi , Bai Ji Ping
Published: February 2012

Aiming at the issue of steel belt of the box punching CAM, an optimal layout algorithm is presented to automatically select process parameters. Based on improved simulated annealing algorithm, polygon detecting method is used to achieve auto-shunning shear corners of the steel belt of the box. The application of the software developed based on the algorithm is of the fast convergence and effective punching teeth layout.
Research on Defining Regional Boundary of the COREX Melter Gasifier by Using Image Processing
Authors: Luo Zhi Guo , Han Li Hao , Lei Xiao , Di Zhan Xia , Sun Jun Jie
Published: February 2012

In this paper, a two-dimensional hot model of melter gasifier, in which paraffin and corn are used to simulate DRI, coke and lump coal respectively, has been established to study the regional boundary in this paper. While the whole experimental process is recorded by the high-speed camera, the image processing method is put forward to define each regional boundary. By means of this method, the boundary of raceway, cohesive zone can be obtained quantificationally.
Determination of Hydrogen Peroxide Residue in Food Using CdS Quantum Dots as Fluorescence Probes
Authors: Zeng Yun Long , Wang Ya Jing , Su Zhong Hua , Tang Chun Ran
Published: February 2012

A simple and accurate method for determination of hydrogen peroxide (H2O2) using carboxymethyl cellulose coated CdS quantum dots (QDs) as a fluorescence probe was established. The influence factors of the fluorescence quenching system and the optimum conditions were investigated for analysis of hydrogen peroxide. It was found that the maximum relative fluorescence quenching intensity produced at pH 8.5 in 0.035 mol/L KH2PO4-Na2HPO4, when the concentration of CdS QDs was 1.9×10-3 mol/L and the reacting time and temperature were 45 minutes and 30°C, respectively. Under the optimum conditions, the relative fluorescence quenching intensity has a linear relationship with the logarithmic concentration of H2O2 in the range from 3×10-5 to 5×10-2 mol/L. The limit of the detection is 2.3×10-6 mol/L for H2O2. The method was used to determinate the amount of remained H2O2 in milk and Calcium Tablets successfully.
Synthesis and Application of a Novel Polymer as an Antimicrobial and Water and Oil Repellent Finishing Agent for Cotton
Authors: Li Zheng Rong , Tu Wei Ping , Fu Ke Jie , Zou Jie
Published: February 2012

A novel polymer APFC containing quaternary ammonium and perfluoroalkyl groups was designed and prepared by emulsion polymerization using interfacial redox initiator system, the average size of the emulsion particles was about 103nm, APFC was applied on cotton fabrics to show the antimicrobial activities and optimum water and oil repellency by a pad-dry-cure process, the water repellency scores and oil repellency ratings of the cotton fabrics finished with APFC can reach 100 and 6, respectively. We evaluated the efficacy of the antimicrobial activity of cotton fabric finished with APFC , the antimicrobial test result of the finished cotton fabric showed a 97.4% reduction in the number ofStaphylococcus aureus(ATCC6358) and a 90.5% reduction in the number ofEscherichia coli(ATCC8099).
The Progress of Research on Soil Heavy Metals
Authors: Ye Yin , Yang Zhen , Dang Xiao Peng , Liu Zi Huai
Published: February 2012

Recently, with the developing of new techniques, more new techniques has been used in the area of soil heavy metals monitoring. This paper reviewed the methods utilized in determination of total mass and morphology analysis of soil heavy metals, summarized the current research progress on soil heavy metals and pointed out the weak points of recent works. The article also forecasted the developing tendency of the methods of determination of total mass and morphology analysis of soil heavy metals.
Impact of CuO NPs to Alga Microcystis Aeruginosa: Effect of Dissolved Organic Matter
Authors: Li Jing , Gao Dong Mei , Wang Zhen Yu
Published: February 2012

With the rapid development and versatile applications of nanotechnology, a large quantity of nanoparticles (NPs) has been released into the environment. It has been one of the most popular studies that concerning the toxic effect of NPs to the algae in aquatic ecosystem. The membrane integrity of algal cells was assessed using different methods when algae were treated by CuO NPs in the absence and presence of Suwannee river fulvic acid (SRFA), one of DOM. We found SRFA could increase the toxicity of CuO NPs to cell membrane due to the more stable NPs suspension in the presence of SRFA. Results additionally indicate that maybe oxidative damage caused by CuO NPs was the primary reason that led to membrane structure and function failed.
Preparation and Characterization of Nd-Doped Ti/SnO2-Sb2O5 Electro-Catalytic Electrodes Used for Reactive Brilliant Red X-3B Wastewater Treatment
Authors: Li Shan Ping , Wang Hong Bo , Lian Jun Feng , Zeng Xue Yuan
Published: February 2012

The best catalytic capacity of Nd-doped Ti/SnO2-Sb2O5 electrodes was obtained by sol-gel preparation. Nd-doped Ti/SnO2-Sb2O5 coating was characterized using technique such as scanning electron microscopy (SEM), and X-ray diffraction (XRD). Nd-doped electrode fragments looks smaller, more compact and more uniform than undoped electrode through SEM. The crystal cell’s average diameter of Nd-doped electrodes was 3.48nm through XRD. BOD5/COD of Reactive Brilliant Red X-3B increased 200% under optimum conditions after 1h electrolysis. Instantaneous current efficiency (ICE) was 51.15 % in first 40 min, 35.73 % in first 60 min. In the first 40 minutes of electrolysis process, COD of Reactive Brilliant Red X-3B changes conformed to the pseudo first-order kinetic equation. Electrical Properties Tests showed that the oxygen evolution potential values of Nd-doped electrodes were higher than the undoped electrodes in various media.
Performance of a Solar Drying System Driven by a Hybrid Power System
Authors: Zhong Hao , Li Zhi Min , Wu Tong , Yu Ming Jiu , Tang Run Sheng
Published: February 2012

To increase the production and improve the quality of dried agricultural products, a new drying system with a hybrid driving power system was developed and tested. The system with total collector area of 100m2 is consisted of 10 drying units and each of them is consisted of 5 identical air collectors and a greenhouse-like drying chamber. Each of collectors in the system is equipped with a DC fan, powered by either 120W solar modules or a 300W wind turbine, and an AC fan, directly powered by the electricity from grid. Such drying system can operate in all time of any day and avoid any possible spoilage of dried products as found in conventional solar dryers due to the formation of mould on the surface of dried materials in the events of consecutive rainy days. Field test for the drying of 9 fruits was conducted from November to December in 2005. The results indicated that the system was very effective for the drying of fruits and the solar drying time for most of the materials to be investigated was only one third of that required in the natural sun drying. Test results also showed that the nocturnal ventilation of drying chambers at the early stage of drying exercise was necessary for materials with high initial moisture content in order to further shorten the solar drying time.
Experimental Research on Compressive Age Strength of Ceramisite Concrete
Authors: Yang Wei Jun , Wang Peng
Published: February 2012

Early age strength of ceramisite concrete gains quickly in strength,the 7d strength can be over 80% of the 28d strength.The thesis researched on relationship between age and strength with a great lot of experiments,and predicted the 28d strength by early age strength,that satisfied the project need.
The Effect of Centrifugal Force and Coriolis Force on Vehicle-Flexible Bridge Vertical Vibration
Authors: Xiao Xiang , Ren Wei Xin , He Wen Yu
Published: February 2012

Considering centrifugal force and Coriolis force caused by the real-time deformation of bridge, a vehicle-bridge interaction model is established. Take simply supported bridge subjected to an one-axle vehicle for example, the mass matrix, damping matrix, stiffness matrix and load vector of the vehicle-bridge system are derived via modal analysis method, thus the vertical motion equation of vehicle-bridge system, which can better reflect the operation characteristics of vehicles running on the bridge, has been established.
Modeling and Predicting Tensile Strength of Tungsten Alloy by Using PSO-SVR
Authors: Tang J.L. , Cai C.Z. , Zhu X.J. , Wang G.L. , Cao D.F.
Published: February 2012

In this paper, the support vecstor regression (SVR) approach combined with particle swarm optimization (PSO) is proposed to establish a model for predicting tungsten tensile strength base on the tension experimental data of tungsten alloy under two influential factors, including tungsten content and deformation magnitude. Comparing the prediction result of PSO-SVR model with that of back propagation neural network (BPNN) model, it is shown that the prediction precision of SVR model is higher evaluated by identical training and test samples. The mean absolute error (MAE), mean absolute percentage error (MAPE) and root mean square error (RMSE) of SVR model, all are smaller than those of BPNN. This study suggests that SVR is an effective and powerful tool for predicting the tensile strength of tungsten alloy.
A Structure Optimization for Hooklift Arm Device Based on the Genetic Algorithm
Authors: Chen Huan Ming , Liu Da Wei
Published: February 2012

Based on the theory of FEM, the hooklift arm is modeled with the FEM software, and the structure of the device is optimized with genetic algorithm in a multi-objective/multi-parameter optimization environment, which results in an optimal design decision of the hooklift arm device under the engineering constraint. Comparison between optimized design decision and original design decision shows that the optimization is correct and the proposed multi-objective/multi-parameter optimization method is effective in improving the hooklift arm device.
Study on a Pneumatic Automatic-Extendable Crash Energy Absorption System
Authors: Cao Li Bo , Wang Hong Bao , Wu Jun , Chen Hui Qin
Published: February 2012

This paper presents a pneumatic energy absorption system which can extend the energy-absorption beam automatically just before crash. The system consists of thin-shell energy absorption structure, pneumatic equipment and control system. When the control system detectives a crash accident is unavoidable, the pneumatic equipment will extend the energy absorption beam which is fixed in thin-shell energy absorption structure immediately to increase energy absorption space. This system has been equipped on a mass produced bus, and it indicates that the length of energy absorption space can be increased more than 230 mm instantaneously before a crash accident occurs. The time used to extend the energy absorption beam is less than 100ms.
Mechanical Analysis of Construction Process for Shallow Weaking Surrounding Rock Multi-Arch Tunnel
Authors: Lai Jin Xing , Zhang Guang Long , Liu Xiao Wei
Published: February 2012

Based on a practical engineering, considering the characteristics such as shallow,weaking surrounding rock, large span, double-arch of the tunnel, the stress and strain of surrounding rocks, support structure and mid-wall were analyzed by FEM for different excavating procedure. The simulation results were compared with in-situ monitoring results. The crown settlement and convergence displacement are divided two obvious increasing stages. Surrounding rock upper and under the mid-wall generate bigger plastic strain and should be strengthened. Temporary support of the pilot bears bigger load and should be reinforced. Bearing bigger horizontal direction tensile stress and uneven load, the bottom of mid-wall must have enough reinforcing steel bar or employ augment foundation. The analysis results provide a scientific basis and technical guidance for the construction optimization of the tunnel constructed by three-pilot excavation method.
Research on Modeling Method for Freezing Tunnel with Fractured Surrounding Rock
Authors: Kang Yong Shui , Liu Quan Sheng , Shi Kai , Liu Xiao Yan
Published: February 2012

The modeling method for freezing tunnel with fractured surrounding rock is discussed. Frost weathering of rock in cold regions poses serious threat to the stability of geotechnical engineering. Fracture in the freezing rock plays an important role in the mechanical features of the rock mass. However, most of the previous study on freezing rock considered the rock as continuous media, in which the effects of fracture are not reflected sufficiently. This paper overcomes the above-mentioned insufficient and considers the fracture as an important factor while modeling. The model of frost fracture is built by AutoCAD and then transferred into ANSYS for meshing, and finally imported into FLAC3D for calculating by converting procedure. The method of equivalent coefficient of thermal expansion is used to simulate the expansion of water while freezing. The stress and thermal fields after some steps of calculation are ultimately simulated and the influence of fractures is reflected in the results.
Optimal Design Research of Post-Processing Technology Based on Settlement Control
Authors: Tong Huai Feng , Suo Li Jun
Published: February 2012

In the construction of thick filling area on expressway soft-foundation, the free pore water in the saturated foundation soil of expressway is seldom discharged immediately, and the excess pore water pressure comes into being, which lead to the delay of the process of soil consolidation, and the lag of stabilization time of settlement and time limit for a project. On the basis of settlement analysis of small non-sand concrete pile composite foundation under the action of anaphase load, optimal design method of the post-processing technology for soft-foundation is researched on the basis of settlement control in this paper. Which provides theoretical basis for the design of small pile composite foundation.
The Internal Resistance Characteristics of Lithium-Ion Battery Based on HPPC Method
Authors: Lou Ting Ting , Zhang Wei Ge , Guo Hong Yu , Wang Ji Song
Published: February 2012

The real time power prediction of power battery pack used in electric vehicles is a difficulty of the battery management system. The internal resistance characteristic of the battery can be used to achieve the prediction of battery power based on the close relationship between the value of real time power and internal resistance. In this paper, the internal resistance characteristic of the power type lithium-ion battery are tested with HPPC(hybrid pulse power characterization) method, the relationship curves between the capacity or internal resistance of the battery and temperature are given, the temperature properties of the capacity and the ohmic resistance of the battery are obtained, and the basis of online resistance identification and peak power computation for the battery pack is provided.
Thermodynamic Analysis of Solar Driven Vuilleumier Cycle Heat Pump
Authors: Tang Jian Cheng , Li Bing , Wu Yu , Xie Ying Bai
Published: February 2012

Because the refrigerant can cause serious damage to the ozone layer and form the greenhouse effect, developing green environmental protection refrigeration technology has become a consensus. Based on the view, this paper puts forward a new device called the solar energy driven VM cycle heat pump which used the natural working materials—nitrogen as the refrigerant and the clean energy—solar as the driven energy. According to build the thermodynamic model, the influence of heat source temperature on the ideal cycle has been analysed. And COP of the solar driven the VM cycle heat pump will be received. With the city of Beijing, for example, the device refrigeration COP can reach at least 1.4.
Synthesis, Photochromism and Optical Recording of a New Diarylethene
Authors: Wang Li Qin , Pu Shou Zhi , Yan Liu Shui , Cui Shi Qiang
Published: February 2012

A new unsymmetrical photochromic diarylethene 1-(2-methyl-3-benzofuranyl )-2- (2-n-butyl-5-hydroxymethyl-3-thienyl ) perfluoroncyclopentene (1o) , was synthesized and its optoelectronic properties, such as photochromism in solution as well as in poly-methylmethacrylate (PMMA) amorphous films, fluorescences were investigated. This new photochromic system also exhibited remarkable optical storage character.
Mechanical Properties of Forged Ti-6Al-4V Structure by Electron Beam Welding
Authors: Qi Hong Yu , Xie Jian , Li Shao Lin , Yang Xiao Guang
Published: February 2012

The blisk (bladed disk) is a new structural component of the modern aero-engine and plays an important role in improving its performance. Ti-6Al-4V alloy joints welded by electron beam have been widely used for compressor blisk in advanced aero engine. It is necessary to analyze microstructure and mechanical properties of Ti-6Al-4V welded structure by electron beam welding (EBW) for failure analysis and structure design of blisk. Microstructure of Ti-6Al-4V welded structure by EBW was investigated by microscopic observation and micro indentation testing. Experiment results show grain coarsening in fusion zone (FZ) and heat affected zone (HAZ) appears large gradient organization structure, which presents significant local heterogeneity. On the centerline perpendicular to the welding direction, Vickers microhardness was measured in increments of 1mm, 0.5mm, 0.25mm and 0.1mm. Due to the presence of martensite, microhardness of the fusion zone is about 20% higher than that of the base material. The size of joints in different regions was acquired, 2.5 to 3.0-mm-wide in FZ and about 0.7-mm-wide in HAZ respectively. Three different types of EBW samples were designed for tensile test, including welded structure, welded joint and base material. Three different stress-strain curves of specimens were acquired, including welded joint. The experiment data indicates that the tensile strength of welded joints is 8% more than that of the base metal.
Prediction of Hardness in Heat Affected Zone of 9%Ni Steel
Authors: Yan Chun Yan , Yang Shun Zhen , Zhao Jian Hua , Li Wu Shen
Published: February 2012

Various methods have been introduced to predict postweld hardness of the heat affected zone (HAZ) for 9% Ni steel which is a primary steel adopted in the construction of liquefied natural gas (LNG) storage facilities. Two models were derived for the evaluation of the HAZ hardness, and then validated. The formulae developed in this investigation are sufficient to predict the hardness of the HAZ for 9% Ni steel . For the model using a rule of mixture, it is suggested that the morphology of martensite should be taken into consideration. Since the prediction of hardness depends on the calculation of the critical cooling time and hardness of microstructural constituents, a formula to estimate the hardness of martensite in HAZ was given. For empirical equation relating welding parameters, calculation results were found to give a fairly good description of the postweld HAZ hardness.
Expression of Anthocyanin Biosynthetic Genes during Fruit Development in ‘Fengxiang’ Strawberry
Authors: Zhou Bo , Yan Shu Hua , Li Yu Hua
Published: February 2012

Anthocyanins are the main pigments in flowers and fruits. In most cases, anthocyanin accumulation in fruit is highly controlled by the developmental level. In this study, the cDNA fragments of three genes, chalcone synthase (CHS), dihydroflavonol 4-reductase (DFR), and anthocyanidin synthase (ANS), which are involved in the flavonoid pathway, were isolated from total RNA of strawberry ripe fruit by using polymerase chain reaction technique and labeled as probes to determine the expression of anthocyanin biosynthetic genes. Northern analysis showed that a correlation between anthocyanin accumulation and expression of the flavonoid pathway genes during the ripening of strawberry fruits. At the early stages of fruit development, the mRNA levels encoding CHS, DFR, ANS were high probably responsible for the accumulation of condensed tannins, but the levels decreased dramatically when fruits turned white from green. During the stage of pigment accumulation, their mRNA levels increased strongly to be involved anthocyanin biosynthesis. Difference of CHS in mRNA abundance was correlated with differential accumulation of anthocyanins throughout the process of fruit development. Therefore, CHS could be a key structure gene involved in anthocyanin synthesis. Furthermore, the co-ordination of expression of anthocyanin biosynthetic genes implied a common regulatory mechanism controlling the expression of structural genes in the flavonoid pathway.