bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Cored Wire Re-Sulfurization Injection for Compacted Graphite Cast Iron
Authors: Feng Yu Shuang , Ji Ze Sheng , Wu He Sheng
Published: January 2015

To promote the application process of compacted graphite cast iron in non-automotive industry, cored wire re-sulfurization injection was developed for the production of compacted graphite cast iron. Firstly, ductile cast iron was produced by cored wire injection. Then, the effective final residual Mg level was reduced to the appropriate range for compacted graphite formation by feeding sulfidizing cored wire containing 99% S. In this paper, the influencing factors on percentage of compacted graphite were analysed, such as the final residual Mg level, cored wire injection speed. The results show that compacted graphite cast iron with less than 20% nodularity can be produced steadily on the condition of adopting the correct speed and the added sulfidizing cored wire in the range from 0.8m/t to 0.9m/t. Practice has proven that cored wire re-sulfurization injection would be most appropriate for jobbing foundries intending to manufacture compacted graphite cast iron castings for engineering industries.
The Fabrication of Co-Continuous SiC/P20 Steel Composites
Authors: Zhang Yun Long , Zhang Yu Min , Li Jin Ping , Hu Ming
Published: January 2015

The network SiC ceramics was fabricated by combining organic foam impregnation and presureless sintering method. The co-continuous interpenetrating SiC/P20steel composites were fabricated by means of pressureless infiltration technique. The results showed that coarse surface of SiC ceramics with three-dimensional network structure was obtained and observed, which was halpful for the reaction of metal alloy during the impregnation process. The continuous interface could be detected in the SiC/P20steel composites.
Oxidation Behavior Research of the SiC/B4C Multiphase Ceramics
Authors: Zhang Yun Long , Song Xiao Gang , Li Guo Jing , Zhang Yu Min
Published: January 2015

Inthis investigation, the rare-earth oxide Yb2O3 combined with Al2O3served as sintering additives and SiC and B4C powder were applied to fabricate SiC/B4C multiphase ceramics composites by pressureless sintering. The results proved thatcombination of Al2O3 and Yb2O3 sinter additives were effective fordensification of SiC/B4C composites. The influence of oxidation time onthe phase constitution, micro-structure and oxidation behavior of SiC/B4C composites was investigated.Theformation of eutectic phase Yb2Si2O7 phase waswrapped on the SiC surface and it reduced further oxidation of SiC particles.The oxidation kineticcurves followed a parabolic rule.
Simulation Study on Aluminium Alloy 7075-T6 Welding Based on ANSYS Software
Authors: Dong Kai
Published: January 2015

This paper constructs aphysical model of aluminium alloy 7075-T6 welding based on ANSYS software, andsets simulation welding process to successfully obtain the change data anddistribution rule of welding temperature field and stress field for convenienceof providing guidance for welding technology of aluminium alloy 7075-T6.
The Study on Theoretical Prediction Method of Corrosion-Induced Cracking of the Concrete Cover
Authors: Qi Chun Ling , Wang Xian Li , Meng Yan Yu , Zhong Yu Xia
Published: January 2015

The concrete covercorrosion-induced cracking is the key to service life predicting of reinforcedconcrete structures. The existing research results make engineering andtechnical personnel in specific applications bewilderment. In this paper, therepresentative theoretical analysis methods of existing have been classifiedand the characteristics of various methods have been analyzed, the accuracy ofvarious methods has been comparatively analyzed by a concrete case.
Magnetic Grinding Technology in Precision Machining of the Cam Surface
Authors: Wei Zhi Qiang , Gao Feng
Published: January 2015

Many Magnetic Abrasive Finishing has good flexibility, adaptability, self-sharpening characteristics, in the international arena has attracted wide attention, and its research results have been finishing in the plane, the outer surface, the inner surface of a round face and forming occasions been applied, Based on the precision grinding of cylindrical cam surfaces to illustrate the application of magnetic grinding technology in precision machining of the cam surface.
Research of the Particle Gradation Technology of Components in PBX Explosive Based on CPM Model
Authors: Huang Qiu An , Xu Geng Guang , Chen Jian Yu
Published: January 2015

Basedon the assumption of related parameters in compressible packing model, thecompressible packing model was used for the calculation of the explosivespacking efficiency. The accuracy of the calculation was verified by experimentsand the relative error was 2.49%. Besides, the influence of content offineparticles and particle size distribution in explosives on stacking efficiencywas discussed. The results show that the stacking efficiency was increasingwith the particle size distribution increasing from 0~300μm to 0~700μm. Thepacking efficiency reached it’s maximum value when we only increased thecontent of fine particles to 40%. Therefore, the packing efficiency has arelation with particle size distribution of raw materials.
Thermal Aging Behavior of Ethylene Propylene Diene Monomer (EPDM) Rubber
Authors: Liu Jie , Wang Bin , Zhang Lun Wu , Zhu Lei , Luo Tian Yuan
Published: January 2015

Ethylene propylene diene monomer (EPDM) rubber was exposed to an accelerated thermal aging environment produced by an air-circulating oven for different time periods. The changes of thermal stability and chemical structures of EPDM were monitored by thermo-gravimetric analysis (TGA), Attenuated total reflection-fourier transform infrared spectroscopy (ATR-FTIR) and X-ray Photoelectron Spectroscopy (XPS). The results showed that the accelerated thermal aging environment did not obviously affect the thermal stability of EPDM. FTIR and XPS confirmed the formation of hydroxyl, carbonyl and ester groups in the test environment.
Design and Research of Emergency Transport Security Decision Support System
Authors: Li Hong Ying
Published: January 2015

With China's rapid growth in the number of cars, traffic accidents, traffic congestion and other problems have become the bottleneck of urban economic development. Our cities are in the "abnormal" crisis-prone period. The impact of disasters on people's lives emergencies growing, life and property of residents pose a great threat. As a modern city traffic arteries, any relief activities are inseparable from the smooth roads. And the roads open is the main form of transport security, is the distribution of emergency supplies, personnel, emergency medical aid and other emergency rescue preconditions, while smooth roads can reduce the loss of life and property losses to a minimum to reduce incidents. Therefore, actively carry out research and development organization to protect emergency transportation and emergency transportation decision support system, providing useful information for disaster prevention and relief, reduce the degree of disaster losses, improve our ability to deal with major disasters is important.
Finite Element Simulation and Experiment of Mechanical Expanding for Longitudinal Welded Pipe
Authors: Yao Yun Feng , Gao Ying , Li Jun Xia , Zhang Shuang Jie , Han Tao
Published: January 2015

A two-dimensional finite element simulation model of longitudinal welded pipe is established by the nonlinear finite element software ABAQUS. Testing enlargement mould is used for the expanding experiments for the welded pipe under the laboratory condition. The expanding force, ovality and the shape are simulated and measured. Comparing the experimental and the simulated results, the values are fitted well.
Self-Propelled Corn Harvester Virtual Design
Authors: Ming Zhe
Published: January 2015

Aiming at the need to retain the current maize straw harvester in China: Problems and ordinary farmers harvest corn after the completion of the overall structure, design of self-propelled corn harvester; 3D parameter modeling software application for modeling and Simulation of harvester ear picking roller, complete harvester virtual prototype assembly, improves the design efficiency of the harvester; the whole structure compact, cost-effective, reliable work.
Simulation Analysis of Stiffness and Strength of Lift Mechanism for Wire Bundling Machine
Authors: Liu Qian , Wang Feng Hui
Published: January 2015

This article mainly completes Simulation Analysis of Stiffness and Strength for wire bundling machine which design. It primarily uses ADAMS, SolidWorks, ANSYS Workbench series of simulation software to complete the simulation of wire bundling machine lift mechanism, Cleverly combining the advantages of multiple software, improving the efficiency of analysis. Analysis of process is doing dynamics analysis of the lift mechanism, getting force trend during lift mechanism rising by using ADAMS. According to the analysis results, when it adds load that is equivalent to max force, the stiffness and Strength of the lift mechanism meets the requirement, the design model meet the requirements.
The Bionic Anti-Adhesion Study of the Clay on Caterpillar Surface
Authors: Li Jing , Du Feng , Jiang Hai , Li Qiang
Published: January 2015

With analysis of the phenomenon that clay adsorb to the caterpillar surface, a new idea focused on improvement in the surface topography of caterpillar to decrease adhesion of clay is presented on the basis of inspiration from the biological hydrophobic phenomenon and perspective of bionics. The surface topography with papillary structure of caterpillar surface is designed on the basis of Lotus-leaf-likes surface with analysis of its microstructure in accordance with similarity principle. The new structure could effectively prevent clay from adhering to caterpillar surface. A model of the new structure is also built.
Enzymatic Reaction Kinetics of Papain-Extracted Collagen from Bighead Carp Scales
Authors: Li Min , Chen Liu Meng , Jiang Bo Quan
Published: January 2015

Collagen, as an important biomedical material, has been widely used in medical industry. Fish waste (scales, skins, bones, fins and swim bladders) is a kind of newly developed alternative collagen raw material.This paper uesd papain as enzyme and local bighead fish scales as raw material to extract collagen. More attention was paid to the study on enzymatic reaction kinetics of papain-extracted collagen. The results showed that two kinds of kinetic models(Michaelis-Menten equations and exponential type dynamic equations) at 20, 25 and 28°C were established, respectively and experimentally proved to be basically in agreement with the actual values. These models have a great significance to predict, adjust and control the reaction rate and production output under different conditions.
A Method for Harvesting Energy Using Piezoelectric Transducers
Authors: Chopra Kshitij , Nigam Kritika , Pandey Sujata
Published: January 2015

This paper analyses the behaviour ofpiezoelectric transducer for harvesting energy. The transducer was designedusing different materials for harnessing energy that include Zinc Oxide, LeadZirconate Titanate (PZT-2) and Quartz. The transducer was simulated using thesematerials and the voltage generated from ambient vibrations was analysed. MEMsmodule of COMSOL Multiphysics Simulation software was used to perform thesimulations. Behaviour of different materials towards various frequencies madeknown in this study gives an opportunity to estimate the fabricated device and alsosheds light on prospective applications it fits.
Experimental Study on Milling Formation and Milling Force in Green Machining Ti6Al4V
Authors: Wang Hui , Ni Fu Sheng , Ji Xiu Lin
Published: January 2015

The machinability of Titanium alloy Ti6Al4V is poor, so the new green cutting technology with water vapor and ionized air as coolants and lubricants was proposed to achieve the aim of efficient and green cutting for Ti6Al4V. In this paper, the milling formation and milling force were studied in machining Ti6Al4V with application of ionized air and water vapor for cooling lubricants. A set of milling tests using carbide tool YG6 were performed under dry cutting, oil emulsion, water vapor and ionized air, respectively. The results of tests indicated that the milling formation was decreased with increasing feed per tooth and the milling force increased with increasing feed per tooth, the milling formation and milling force were reduced during water vapor and ionized air condition.
The Analysis and the Application of Tool Nose Round Radius Compensation Based on FANUC NC System
Authors: Gao Zhi Xian
Published: January 2015

The realization of the tip arc radius compensation in NC machining process based on FANUC CNC system were presented in this paper. The reasons on the processing of machining error caused by nose radius were analyzed. The tip bearing of the tool on the rear tool carriage on the NC lathe with FANUC system was introduced．The application of tool nose round radius compensation in NC machining were showed by examples．
A Derating Control Strategy Based on the Stator Temperature of PMSM
Authors: Cao Yan Ling , Cao Ping
Published: January 2015

The derating control strategy for motor stator temperature is a very effective protection measures. It not only can make better use of motor ability but also can satisfy the requirement of the vehicle. This paper presents a derating control strategy based on the temperature of stator winding ends since it is the highest temperature point from the simulation results. The motor stator temperature is divided into several regions applied with the various derating control rules. To limit the peak phase current instead of the torque is proposed to inhibit the temperature rise especially in the field weakening region because a large extra demagnetizing current is required in this region.
An Overview of Micro-Grid Control Strategy Research
Authors: Ma You Jie , Yin Li Yang , Zhou Xue Song
Published: January 2015

This paper introduced the understanding of the concept of smart micro-grid in domestic and international authority. It pointed out that micro-grid was an effective form to achieve active power distribution in intelligent grid and an important part of the intelligent grid. It summarized and discussed the theory of intelligent micro-grid control. [1]It divided control strategy into the follow of grid control strategy and the formation of grid control strategy. Each class contains an interactive and non-interactive control idea at the same time. It has given a clear definition and criteria for judging and proposed future direction of the intelligent micro-grid control strategy.
Research of Velocity Stability of Separate Meter in and Separate Meter out Control System for Over-Running Load
Authors: Cao Zhong Yi , Liu Xin Ming , Wu Wan Rong
Published: January 2015

There are some defects in the traditional over-running load hydraulic system, such as velocity control is poor and prone to velocity jitter, etc. In order to improve these weaknesses, the components and work principle of the separate meter in and separate meter out (SMISMO) were introduced and the actuator’s feature were analyzed , the simulation model of hydraulic studied system was built, the factors affecting the stability of the system are discussed in this paper. Simulation and experiment showed that the novel control system possessed higher velocity control precise and good stable characteristics.
Study on the Performance of Pneumatic Planar Bending Flexible Joint with Different Boundary Conditions
Authors: Zhao Yun Wei , Geng De Xu , Liu Xiao Min , Wu Guang Bin , Liu Hong Bo
Published: January 2015

In this paper, we develop a new type planar bending flexible joint adopting rubber tube and elastic constraint components. When supplied the air pressure, the joint can elongate in axial direction or bend arbitrarily in the planar. Experiments study on contrast of mechanical character of planar bending flexible joint in different restrained conditions are done on the static experimental device, and the influence of the structure of constraints ring on the elongation and the bending angle of the joint. The experiments show that the deformation of the joint with arc-shaped restraints ring significantly larger than the joint with cylindrical-shaped restraints ring.
Three-Dimensional Numerical Simulation of Immersion Diffraction Sound Field Characteristics for Low Thicknesses Pipe Ring Weld
Authors: Fu Yue , Lu Chao , Chen Guo , Wang Chan
Published: January 2015

The numerical simulation of immersion TOFD (I-TOFD) detection for low thicknesses pipe ring weld was performed by Ultrasonic simulation software Wave 3000. The author get the sound field characteristics of diffraction wave through setting eight receivers in receiving area, thus determine the strongest diffraction wave energy range between 50°~60°.In the simulation, the author found that the longitudinal wave inspired by source after refraction in water-steel interface, continue to spread along under the surface of water-steel interface, and then the wave go back to the water again. We call the wave as the lateral wave of I-TOFD. So the defects can be determined according to the lateral wave and the bottom echo wave. The result of numerical simulation verified the feasibility of using I-TOFD method in detecting low thicknesses pipe ring weld in theory.
IFMOD: Intuitionistic-Based Fuzzy Multi-Objective Decision in Multi-Agent System
Authors: Wang Hui Ying , Zhang Li Na
Published: January 2015

Multi-agent system (MAS) contains many intelligent agents, which makes decision for many practical scenarios. However, due to complex decision environment, many data required from sensors are fuzzy. Although a lot of legend solutions address this problem, the decision making result is not very accurate. To solve the problem, we present IFMOD, an algorithm using fuzzy multi-objective decision based on interval-valued intuitionistic fuzzy set. The algorithm adopts iteration way to close the precise value. To make IFMOD algorithm effectively, MAS makes hierarchical structure to complete fuzzy decision. In MAS, most intelligent agents may process the data individually, while other higher intelligent agents make a final decision entirely. The experiment shows that, it is effective for MAS to solve the problem of fuzzy decision in distributed networks.
Based on LabNIEW Environment Auto Fault Detection Research of Virtual Test System
Authors: Liu Sheng Rui
Published: January 2015

Virtual test system based on software as the core of intelligent system based on computer technology. In LabNIEW environment are introduced, on the auto electric power steering, car trouble related performance was tested. Car trouble vary widely, the characteristics of the dynamic and uncertainty, in view of the present automobile fault detection of real-time detection of the existence of difference, the data is not convenient to undertake unity management problems, this paper used the GPS, GPRS and CAN bus technologies, design a set of automatic control system. With the development of era, the existing Petri net reasoning algorithm cannot have satisfied nowadays car diagnostic technology, aiming at this situation, this paper proposes a modified algorithm, with fuzzy reasoning algorithm of Petri net optimization, finally, the fault diagnosis. According to diagnosis, combining wavelet analysis and the principle of artificial immune system, put forward a kind of based on wavelet transform and the fault diagnosis system of the immune system. According to the characteristics of the wavelet analysis, it is used to analyze the unstable signal, signal feature vector as raw data, using the improved negative selection algorithm for himself - he analysis the original data.
LRE Fault Detection and Isolation Based on Fuzzy Direction Neural Network
Authors: Huang Min Chao , Xing Bao Yu
Published: January 2015

A fuzzy directions neural network used for fault detection and isolation (FDI) of a liquid rocket engine (LRE) is presented in this paper. Neural network utilizes fuzzy sets as engine fault classes. Each fuzzy set is an aggregate of fuzzy direction bodies. A fuzzy direction body is described by a direction vector, an included angle and two radii. FDI simulation of the turbo-pump fed liquid rocket engine demonstrates the strong qualities of the fuzzy direction neural network.
The Current Research on Micro-Grid
Authors: Ma You Jie , Yu Miao , Zhou Xue Song
Published: January 2015

This article introduces the significance of studying the Micro-grid, the definition, the characteristics ,the basic structure,the architecture and working principle of Micro-grid. Discuss the Micro-grid constitutes, including loads, distributed generation,etc. At last, it points out the disadvantages and the directions of Micro-grid, we should come to a unified definition of Micro-grid and a unified protection program and configuration,in order to get ready for the early Micro-grid research.
Cloud Computing Research Vehicle Traffic Information Service System Based on Network
Authors: Zhou Li
Published: January 2015

In vehicle network under the cloud computing environment model of traffic information service system construction as the goal, the use of cloud computing technology and service oriented software architecture is divided into thought, differentiation and security mechanism from the service account, complete vehicle based on cloud computing network traffic information service system of the letter of the architecture design, function design, software structure design. Based on the geographical space cloud services, cloud services based car networking function, constructing high performance, scalable, supporting differentiated information service system. The research results show that: cloud computing car network traffic information service collaborative system can greatly improve the level of intelligent, personalized information service based on traffic, the user required service supply pertinence increased significantly； system can provide traffic information service more safe and reliable for vehicle network users of the service coordination, which helps to guarantee Intelligent Transportation and efficient operation.
Principal-Agent Activities on Small World Network
Authors: Li Min , Ou Rui Qiu , Song Yan Ling
Published: January 2015

As a medium forcommunication and coalition, social network plays an important role in economicactivities. Empirical researches indicate that most of social networks performsignificant small-world characteristics, so this paper assumes the socialnetwork among merchants is a small-world network, and then studies the agencyactivities of merchants by means of simulation based on a game model. We findthat if the average degree of the network increases, the wage of agents willdecrease and social efficiency will increase, but the probability of emergenceof third-part institutions such as courts, which is the basis of modern marketeconomy, will decrease.
The Key Technologies for Classification of Distributed Data Streams
Authors: Xu Hua Fen , Wu Jing , Mao Guo Jun
Published: January 2015

With advances in data collection and generation technologies, environments that produce data streams is more and more. In recent years, the network application is further universal and the applications of a single data stream transfer toward a multi-node distributed data streams, such as sensor network, network monitoring, web log analysis and the credit card transaction data of multiple sites. These data is not only real-time, continuous and large scale, but also distributed. How to manage and analyze large dynamic datasets is an important subject that researchers are faced with. In view of the situation, it presented the formalization description of homogeneous and heterogeneous distributed data stream in this paper, analyzed advantages and disadvantages of the centralized stream processing architecture and distributed streaming processing architecture, discussed the recent progress in distributed data stream classification algorithm, summed up the problems and challenges faced by the distributed data stream mining, and possible future research directions.
Multipolar Surface Plasmon Peaks in Gold Nanoshells
Authors: Zhang Xing Fang , Liu Feng Shou
Published: January 2015

The intensities of the dipole, quadrupole and octupole modes for gold nanoshells have been investigated with various dielectric constants for the embedding medium and with various sizes of the nanoshells by means of Mie theory. With the increase in the dielectric constant of embedding medium, it is found that the intensities of all modes become stronger first, and then the higher mode starts to become weak. We also observe with decreasing the core size of a nanoshell with a fixed outer radius, a larger dielectric constant for the embedding medium is needed corresponding to the change of higher mode intensities from stronger to weaker. We have ascribed the changes of the dipole, quadrupole and octupole modes to the competition among the variations of induced surface charges, conduction electrons and oscillation electrons.
Research on Fast-Growing Poplar Dyeing Technology Based on Material Properties
Authors: Shen De Jun , Zhang Yan Fei
Published: January 2015

By exploring the acid yellow G to buck dyes dyeing was carried out on the fast-growing Yang path of material。Through orthogonal test to determine the optimum technology of dyeing;Test results are as follows。Dyed with acid dyes, test optimization process is dye mass fraction is 0.3%, dyeing time for 4 days, penetrating agent mass fraction is 0.05%, the dye solution pH value of 5.2.。
Study on the Corrosion Inhibition of Extractive from Jatropha curcas L Seed Meal on Copper
Authors: Wang Jian , Hu Shu Heng , Zhuo Sheng Jun
Published: January 2015

This paper study about different effect of the corrosion of copper in different dosage of Jatropha curcas L seed meal extract in different PH,NaCl and different compound agent. Finally，matching the corrosion effect to the best concentration of the inhibitor with weight-loss method. With the change of Jatropha curcas seedcake extract dosage, the effect has no obvious changes in different PH. With the increase of Jatropha curcas seedcake extract dosage. The higher the concentration of extracting agent to extract effect is better in different NaCl. When Jatropha curcas seedcake extract respectively compounded with 2 kinds of reagent, it enhance the corrosion inhibition of copper .It is shown that best inhibition effect of Jatropha curcas L seed meal extract concentration is 10%, the corrosion rate is 96.38%. And Urotropine effect is not very good, but the corrosion rate can be increased from 25.46% to 75.43%.
Analysis of Mechanics of Disturbed Materials Based on Theory of Duality Disturbance
Authors: Gao Jin He , Zhang Shou Long , Huang Wei Ling , Zhang Yi , Lin Si Ren , Zhang Guang Wu
Published: January 2015

Materials exhibit different characteristics in different levels. Apparent behavior and properties of the material are based on actual measurements and they were studied by the traditional theorems and theories. The article studied a new method for material analysis--analysis of mechanics of disturbed materials based on theory of duality disturbance. For material in the any deformed state，a given material element can be treated as mixed state included RND( RND: Relatively Non-Disturbed) and RCD (RCD: Relatively Complete Disturbed). "Duality" state is made of references state of RND and RCD.[1-3] The apparent behavior of disturbing engineering materials use appropriate perturbation function to describe which connect with "duality".
Review on Sources and Sinks of Main GHGes in Atmosphere
Authors: Yu Zhi Qiang , Wang Yi Feng
Published: January 2015

Global warming is one of the key fields of global change ecology．The sources and sinks of the Greenhouse Gases (GHGes) in the atmosphere：which result in climate warming have been widely investigated around the world in the last 1 0 years．In this paper, sources and sinks of main GHGes in the atmosphere(CO2，CH4，N20)were reviewed．It is believed that the emission／uptake flux of the 3 GHGes between the atmosphere and various ecosystems were not precisely quauntified yet and there are some uncertainties with aspect to the：kind of source and sink．By analyzing related literature, the trends of international：research on the source and sink of the main GHGes were summarized as follows：more and more advanced instruments have been used in the research，more an d more regions have been investigated，more and more concerns have been on the response of emission／uptake flux of the 3 GHGes to the global change an d integrated research comprising ecology ,soil biology, meteorology, microbiology, atmospheric physics，etc．In our country, the research on source and sink of the 3 GHGes were developed since 1 980s．Compared with advanced countries，our related researches were conducted in fewer sites with less frequency and were less systematic． the rapid development so far involved CH4 emission from rice paddies, wetlands, CH4 and N2O emissions from the study of loess - paleosol sequence composition characteristics of greenhouse gases, and forest, agriculture, Soil CO2 emission and absorption of research in the field.
UPLC-ESI-MS/MS Method for Determination of Recombinant Antihypertensive Peptide in Rat Plasma
Authors: Cong Yan Li , Li Shen , Chen Bo , Sun Hai Yan , Liu Dong , Cui Shu Fen
Published: January 2015

The focus of the study was to establish an UPLC-ESI-MS/MS method for the qualitative and quantitative determination of VLPVPR in rat plasma. The method was as follows: Protein impurities in the rat plasma samples were precipitated with methanol; A Waters Acquity BEH C18 column (100 mm×2.1 mm, 1.7 μm) was adopted; the column temperature was 25°C; the mobile phase consisted of methanol-water with gradient elution at the steady flow rate of 0.3 mL·min-1; the detection wavelength was 202 nm. Mass spectrometry applied selected ion monitoring mode with m/z 255 (quantitative ion) and m/z 169 (qualitative ion). It was found that excellent linear relationship was obtained from the range of 10~200 ng·mL-1 (r=0.9991), the limit determination (LOD) of VLPVPR was 1.8 ng·mL-1, the recovery rate was 96.33%~100.76%, The inter and intre-day RSD were less than 7%. We thus conclude that a rapid and sensitive UPLC-ESI-MS/MS method was developed and validated for the determination of recombinant antihypertensive peptide VLPVPR in rat plasma. It can be applied to evaluate the pharmacokinetics of VLPVPR.
Combustion Behaviors of a Compression-Ignition Engine Fueled with Biodiesel at Different Fuel Delivery Advance Angles
Authors: Zang Jie , Zhu Rong Fu , Zhang De Sheng
Published: January 2015

The performance of engine fueled with biodiesel was tested. It was indicated from the experimental results that NOx emission of biodiesel reduced significantly with decreasing fuel delivery advance angle BTDC, while soot emission also reduced when the fuel delivery timing was retarded for 2°CA, and the starting position of heat release rate retarded with the delay of fuel delivery timing. It can be concluded that, retarding fuel delivery timing was an effective method to reduce the NOx emission of engine fueled with biodiesel, but led to reduce the brake power output slightly.
Structure and Calibration Methods of Rainfall-Runoff Models
Authors: Guo Fei , Ma Juan Juan , Zheng Li Jian
Published: January 2015

Hydrological phenomena in nature are always complex processes. Among the studies of hydrology, prediction of runoff from rainfall is a major issue. This is caused by highly nonlinear relationship, variability of spatial and temporal factors (DIMITRI & KHADA, 2003). Additionally, the data for rainfall in long periods tend to be more available than the record of flow (Sajikumar & Thandaveswara, 1999). Therefore, in order to get precise estimates of runoff, rainfall-runoff models are required. This paper describes three types of rainfall-runoff model and the main calibration methods .
Comparative Study on the Effects of Infill Walls on Reinforced Concrete Frame Structures
Authors: Jin Huan
Published: January 2015

Based on the quasi-static test of single-layer, two-bay RC frame model, using DIANA finite element program, a finite element Macro-model of masonry-infilled frame structure was established, and nonlinear finite element analysis of frame structures filled with different masonry materials was conducted. As a result of the existence of infill walls, the failure modes of frame structure have been changed, and which is easy to cause shear failure at the top of frame columns. If masonry materials of infill walls are different, the effects of infill panels on frame structures will be different. Comparative analysis shows that the influence of clay bricks is the largest, followed by autoclaved bricks’ influence, while aerated concrete blocks’ influence is the smallest. Therefore, to avoid the associated failure mechanism caused by infill walls, lightweight masonry materials are suggested to be used in actual engineering.
Study on Concrete Construction Technology of High-Rise Building
Authors: Guo Ya
Published: January 2015

This paper introduces the features and key points of construction of high-rise buildings. Combined with the practical application, the technology of concrete construction is put forward, as well as the control method of concrete pouring quality. According to the specific conditions of construction site, the construction method of foundation from shallow to deep is adapted. The different placement scheme and technical measures are made.
Accurate Measurement on Cross Sectional Area of Single Filaments Using a Desktop SEM
Authors: Yang Xi Ying , Ting Ou Yang , Fei You Qing
Published: January 2015

Cross sectional area of single filaments, a key parameter to characterize fiber properties, was experimentally studied using a desktop scanning electron microscope. Three different methods are employed based on the pixel area, averaged diameter and single diameter measurements, respectively. Results have shown that all three methods can achieve accurate measurement results once the axis of fiber sample is kept parallel to the electron beam. Significant errors are generated for the fiber samples with their axis tilted, which may frequently occur as a sample prepared. For circular fibers, a single diameter measured from tilted fibers is sufficient to determine their cross sectional area at high precision with COV values below 1.6%. By selecting an appropriate method, a desktop SEM can serve as a convenient and powerful tool for accurate determination of cross sectional area as well as morphological observation.
Stereo Image Matching Based on SURF Descriptor
Authors: Zeng Luan , Zhai You
Published: January 2015

In order to improve the robustness performance of SURF descriptor applied to stereo image matching, a new matching method is proposed. By using the ratio of minimum to second min Euclidean distance of corresponding features, we can get the coarse matching points aggregation. Then, the epipolar line is computed from calibration parameters. Correspondences are taken as correct correspondences, only if they fall into a small neighborhood of their epipolar line. Taken errors into account, the neighborhood is set (-3, 3). Using this restriction, we can get the correct matching points aggregation. The experimental results show that the correct matches and matching efficiency are better than RANSAC.
The Preparation and Characterization of AM/2-EHA Copolymer as Profile Control Agent
Authors: Tian Ming
Published: January 2015

Nowadays, the earth’s available oil reserves decreases gradually while a great demand for oil is increasing.To improve oil recovery technique, the development of new profile control agent has important scientific significance and application value. A new copolymer of acrylamide (AM) and Isobutane-Ethylhexyl acrylate (2-EHA) was synthesized as profile control agent by free radical copolymerization. FT-IR and 1H-NMR were used for the structure characterization. Thermo gravimetric analysis, Core/Sand pack experiments and water drive displacement tests of copolymer particles were used to evaluate the properties. The results showed that the copolymer particles had good thermal stability, alkaline resistance, anti-salt property and excellent blocking property as profile control agent.
Research on Parameter Optimization of Mixed Gas IR SVM Calibration Model
Authors: Wang Jiang , Bai Peng , Duan Xiao Hu , Li Yan
Published: January 2015

A SVM calibration model combined with new information processing method of support vector machine and infrared spectroscopy is established. For the problem of model parameters affecting the analysis results, the optimization of the model parameters is studied through the experiment. The mixed gas containing hydrocarbon is used as an example, spectra data preprocessing, spectra analysis band, spectrometer scanning interval, types of kernel function for SVM calibration model, penalty factorC, and other parameters that affect the measurement results are optimized. The experimental results show that the accuracy of the analysis results can be improved in the case of the SVM calibration model optimized and the model has a practical application value.
Profilometric Assessment of Surface Condition of Zinc Coatings Formed by the Continuous Galvanizing Method
Authors: Mendala Jacek , Wieczorek Jakub
Published: January 2015

The paper presents the results of research on surface condition of zinc coatings. Profilometric studies were performed for zinc coatings formed in industrial continuous hot-dip galvanization process and for the same coatings after two years of use. The results include the geometrical shape of 2D and 3D surfaces, distribution of vertices on the surface and roughness and waviness profiles. The parameters Ra, Rz, Sa and Sz were used to define the surface roughness. The study was conducted using FRT Microprof optical profilometer with data acquisition and analysis by MARK III software package.
Client in the Center Metallurgical Enterprise Organization
Authors: Gajdzik Bożena , Kuczyńska-Chałada Marzena
Published: January 2015

The purpose of this publication is to evaluate the scope of the changes implemented in the steel enterprises operating in Poland within the presented issue. The paper presents the components of the client centricity strategies in steel manufacturing companies belonging to global groups. Placing the client in the centre of attention is becoming an increasingly common element of the strategy of many enterprises, including steel works. Implementation of the "client in the center" concept in the organization is a complex task and is based on: changes of processes, measurement of customer satisfaction levels as well as building employee engagement.
The Influence of Addition of the Rare Earth Elements on the Structure and Hardness of AlZn12Mg3.5Cu2.5 Alloy
Authors: Michalik Rafał , Mikuszewski Tomasz
Published: January 2015

Aluminium alloys are characterized by a number of advantageous properties , which include: low density ,high relative strength , high electrical and thermal conductivity , ease of machining and good dumping features. Particular interesting are high-strength aluminum alloys of zinc, magnesium and copper. These alloys are used mainly in aircraft, building &structure, electrical, electrical power and automotive industry. A significant problem associated with the use of high-strength aluminium-zinc alloys is their insufficient resistance to corrosion. Improvement of corrosion resistance can be obtained by application of alloy micro-additives. The article shows results of examinations related to influence of rare earth additive on the structure and hardness of AlZn12Mg3.5Cu2.5 alloy. The scope of examination included: structure testing using scanning microscope, X – ray microanalysis, hardness test. Examinations have shown higher hardness of samples with rare earth additives. Was found , that rare earth addition influences on more fine –grained structure of the AlZn12Mg3.5Cu2.5 alloy.
The Impact of β 2 Adrenergic Receptor Polymorphisms on the Outcomes in Cardiovascular Diseases
Authors: Cipolletta Ersilia , Carillo Annalisa , Annunziata Roberto , Trimarco Bruno , Franco Antonietta , Iaccarino Guido
Published: January 2015

Cardiovascular diseases (CVD) include a heterogeneous group of multifactorial conditions and represent the major health problem in the western society. Many studies have evidenced that inter-individual variability affects the prognosis and the response to pharmacological treatment in patients with CVD. The identification of genetic markers to select patients more susceptible to develop cardiovascular complications has a therapeutic interest for undertaking individualized therapeutic approach. The sympathetic nervous system acts through adrenergic receptor subtypes and plays a key role in the development and prognosis of CVD. In particular, β-2 adrenergic receptors (β2AR), expressed in a wide variety of tissues, are critical regulators of cardiac output, peripheral vascular resistance and metabolism. Several variations with multiple single-nucleotide polymorphisms have been identified in β2AR gene. There are 3 common β2AR polymorphisms characterized in more detail for their influence on functional receptor activity. In particular, the changing an arginine for a glycine at position 16 of the receptor protein (Arg16Gly) is associated with increased agonist-induced down-regulation; the substitution of glutamine with glutamic acid at position 27 (Gln27Glu) leads to resistance to down-regulation; the substitution of threonine with isoleucine (Thr164Ile) at position 164 causes receptor uncoupling from the G protein. Many studies have indicated the association of β2AR polymorphisms with various cardiovascular and metabolic diseases and have contributed to indicate the β2AR gene variants an appropriate target for investigating possible links between receptor polymorphisms, drug responses and susceptibility to CVD. However, the reports on the association of β2AR polymorphisms with clinical outcomes of CVD have been contradictory. In this review, we will illustrate the effects of β2ARs genetic variability on the management of CVD.
Investigating aggressive styles and defense mechanisms in bipolar patients and in their parents
Authors: Bragazzi Nicola Luigi , Pezzoni Franca , Del Puente Giovanni
Published: January 2015

Bipolar disorder (BD) is a very common mental health disorder, whose etiology concerning aggressive styles and defense mechanisms is still poorly known despite the efforts dedicated to develop psychological and biological theories. After obtaining written signed informed consent, this study will recruit inpatients with a clinical diagnosis of BD, based on Structured Clinical Interview and the Diagnostic and Statistical Manual of Mental Disorders criteria, and their parents. The Bus-Perry Aggression Questionnaire, the Defense Style Questionnaire 40, the Symptom check list SCL-90-R, developed by DeRogatis will be administered to the participants, together with a semi-structured questionnaire concerning demographic data (age, gender, employment, education) and only for the patients clinical information (onset year of the disorder, presence of co-morbidities, alcohol and drug use, suicide tendencies, kind of treatment). All the questionnaires are in the Italian validated version. The successful completion of this study will shed light on the relationship between aggressive styles and defensive mechanisms in bipolar inpatients and in their parents, helping the clinicians to develop ad hoc psychological interventions.
Depressive symptoms among adolescent students in Greek high schools
Authors: Zacharopoulou Vasiliki , Tsironi Maria , Zyga Sofia , Gialama Fotini , Zacharopoulou Georgia , Grammatikopoulos Ilias , Avraam Nikolaos , Prezerakos Panagiotis
Published: January 2015

Depressive symptoms in adolescence have been a subject of considerable controversy in terms of their nature, severity and identification. Therefore, the objective of this study was to examine the presence of depressive symptoms in Greek adolescent high school students and to explore the relationship between depressive symptoms and sociodemographic characteristics. For that purpose, a cross-sectional study design was conducted in two public schools in Megalopolis, Greece, from April 2012 to July 2012, using a self-administered questionnaire based on DSM-IV. The target population involved 222 high school students and the response rate was 74.75%. Data was analyzed using trend x2 test, student’s t-test and bivariate analysis. The analysis of survey data was conducted using the SPSS (19.0). Main findings demonstrate that 3.6% had symptoms of major depressive episode. Furthermore, depressive symptoms were significantly higher in girls, while statistically significant relationships were found between students’ physical(P<0.01) and mental health (P<0.008), students’ experiences in school (P<0.02), students’ experiences with friends (P<0.008) and the frequency of depressive symptoms. Overall, the study results reveal that depressive symptoms can occur in adolescents. Early diagnosis, as well as the need for psychological care at adolescence is necessary for the prevention of major depressive disorders.
Ортогональность модулей двойственных групп
Authors: Kostromina Yuliya Vladimirovna
Published: January 2015

В статье рассматривается двойственность Уордилда
для локально свободных групп и двойственность
Арнольда для факторно делимых групп. Показывается,
что соответствующие модули взаимно двойственных
как по Уорфилду, так и по Арнольду групп являются
взаимно ортогональными.
Библиография: 5 названий.
О новых идеальных (невзаимодействующих) газах в сверхкритической термодинамике
Authors: Maslov Victor Pavlovich
Published: January 2015

В работе на доступном для инженеров и студентов языке (без
приведения доказательств теорем и лемм, которые можно найти
по указанным ссылкам, но с приведением элементарных примеров
и простых ассоциаций) дается сравнение изотерм, полученных
на основе нового распределения, с изотермами знаменитой
модели Ван-дер-Ваальса. Предлагается новая интерпретация модели
Ван-дер-Ваальса. На диаграмме Хоугена-Ватсона выделяется область,
где смешиваемость газов может происходить с максимальной скоростью.
Приводится новое распределение, определяется понятие нового
идеального газа и объясняются инварианты изотерм, введенные автором.
Библиография: 18 названий.
AKT Network of Genes and Impaired Myocardial Contractility During Murine Acute Chagasic Myocarditis
Authors: Henao-Martínez Andrés F. , Agler Anne Hermetet , Watson Alan M. , Hennessy Corinne , Davidson Elizabeth , Demos-Davies Kim , McKinsey Timothy A. , Wilson Michael , Schwartz David A. , Yang Ivana V.
Published: January 2015

Chagasic disease is associated with high morbidity in Latin America. Acute Chagasic myocarditis is consistently found in acute infections, but little is known about its contribution to chronic cardiomyopathy. The aim of the study was to phenotypically characterize two strains of mice with differential Chagas infection susceptibility and correlate strain myocarditis phenotypes with heart tissue gene expression. C57BL/6J and Balb/c mice were injected intraperitoneally with 0 or 150–200 tissue-derived trypomastigotes (Tulahuen strain). Echocardiograms, brain natriuretic peptide, and troponin were measured. Heart tissue was harvested for histopathological analysis and gene expression profiling on microarrays. Genes differently expressed between infected Balb/c and C57BL/6J mice were identified. Echocardiograms showed differences in Balb/c versus C57BL/6J infected mice in heart rate (413 versus 476 beats per minute; P = 0.0001), stroke volume (31.9 ± 9.3 versus 39.2 ± 5.5 μL; P = 0.03), and cardiac output (13.1 ± 3.5 versus 18.7 ± 3.2 μL/min; P = 0.002). Gene expression at 4 weeks analysis showed 32 statistically significant (q value < 0.05) differentially expressed genes between infected Balb/c and C57BL/6J mice that were enriched for genes related to the protein kinase B (AKT) pathway. These specific phenotypic features of cardiac response during acute Chagasic myocarditis may, in part, be related to host AKT network regulation.