bluuebunny/crossref_metadata_2025 huggingface dataset:
Mechanical Alloying for Preparation of Ti50Fe45Sn5 Amorphous Alloys Powder
Authors: Wang Ge , Zhang Chun , Zhu Yu Ying , Chao Zhi Gang , Li Qiang
Published: July 2011

Ti50Fe45Sn5 amorphous alloys powder was prepared by mechanical alloying (MA) in a high-energy planetary ball mill. The non-crystallization degree was tested by X-ray diffraction (XRD). It was shown from the XRD results that a higher ball to powder weight ratio (BPR) is advantageous in preparing amorphous alloys powder. The microstructure and shape of the powder was observed by scanning electron microscope (SEM). It was shown from the SEM results that the as-milled amorphous alloys powder is flake shape and assembles together to be agglomeration structure, which is a typical morphology of amorphous powders prepared by MA. Thermodynamic properties and crystallization kinetics behavior of the as-milled amorphous alloys powder were measured by differential scanning calorimeter (DSC). The supercooled liquid region △Tx is broad (up to 119K) and the reduction glass transforming temperature Trg (0.78) is great, which shows that the as-milled amorphous alloys powder has a strong glass-forming ability and the thermal stability of the powder is excellent.
Control of Handling Stability in Four-Wheel Steering Vehicles Based on Individual Channel Design
Authors: Yang Bin , Wan Mao Song , Sun Qing Hong
Published: July 2011

This paper presents a new steering control structure for vehicles equipped with four-wheel steering system. A linear model of the lateral dynamics is used in this paper. This control structure is based on a simplified linear model of the lateral dynamics of such vehicles and aims to decouple the control of sideslip from the control of yaw rate. The control design is based on a linear multivariable plant and the front and rear steering angles, According to the Individual Channel Design paradigm. The proposed control structure has been applied to design sideslip and yaw rate controllers using a more accurate model of the lateral dynamics of four-wheel steering vehicles. Simulations are used to illustrate the performance and robustness of the designed controllers.
Relationship between Dielectric Constants and Moisture Contents
Authors: Xu Ping , Yan Shan Shan , Bin Zhao Hui
Published: July 2011

The parameters that influence the dielectric properties of soil mainly include moisture content, density and temperature, in which moisture content is the most important. One subgrade under construction is selected as engineering example, the dielectric constants are tested with the special instrument, and the moisture content are tested with sand filling method, and then the tested data are analyzed, and the results reveal that: there are better relationship between dielectric constants and the tested moisture contents and compaction degree, and so the dielectric constants are to be tested and then the moisture contents and compaction degree would be calculated according to the relationship, which would be a rapid testing and evaluation method.
Effect and Effect Principle Modeling of Microcomponent
Authors: Yan Xiang Tong
Published: July 2011

For the characteristic of cross-coupled multi-disciplinary research of microcomponent effect plays an important role in the MEMS system. The combination of different effects has the different component principle, then forms the different functional device, completes the different functions. Effect and effect principle modeling of microcomponent in conceptual design for microcomponent are introduced. The effect classification of microcomponent, formal description of effect, the relationship between effect and principle and function decomposing and the mapping between effect and function are described, and the effect model for microcomponent is established. The model is the basis of microcomponent conceptual design solution.
Design and FEM Analysis of a High Efficiency Axial-Flux Brushless DC Motor for Flywheel System
Authors: Zhang Chi , Zhao Guang Zhou
Published: July 2011

A high efficiency axial-flux brushless DC motor assisted by self axial magnetic bearing and used in flywheel energy storage system is proposed in this paper. In this design, the rotor with composite rim acts as the flywheel of the system and is sandwiched between two disk type stators which are made of amorphous metal to reduce iron losses. The dual-stator machine combines the functions of axial flux brushless DC motor and axial magnetic bearing to rotate the flywheel-rotor and levitate it in vertical orientation. The other four degrees of freedom in radial directions are constrained by ceramic ball bearings for simple operation, high efficiency and long life span. Optimized design approaches are employed to achieve low losses, and high power density. Three-dimensional FEM analyses are implemented, and the analysis results support the feasibility of the proposed motor.
Synthesis and Properties of Palmitic Acid-2-Hydroxy-3-Sulfonic Sodium Propyl Ester
Authors: Hao Yu Lan , Cheng Yan Zhao , Wang Xue
Published: July 2011

In this paper,Palmitic acid-2-hydroxy-3-sulfonic sodium propyl ester was prepared with palmitic acid as main material by steps of sulphonation, saponification and esterification. And optimum reaction conditions of each experiment was investigated, the results showed that the best conditions for sulphonation were n(epichlorohydin):n(sodium bisulfite)=0.87:1, reacted at 85°C for 3.5h,conversion ratio was 80.4%. The optimum reaction conditions of sodium palmitate were n(palmitic acid):n(sodium hydroxide)=1:1, reaced at 85°C for 4.5h, conversion ratio was 83%. Palmitic acid-2-hydroxy-3-sulfonic sodium propyl ester was obtained under optimum conditions of n(3-chloro-2-hydroxy sulfonate): n(sodium palmitate)=1.1:1, reacted at 65°C for 6.5h, conversion ratio of product was 86.82%. The structures of product were characterized by FTIR, and its surface properties were studied: such as critical micelle concentration, surface tension , emulsibility and foamability .
Research on Non-Gyro Projectile’s Attitude Measurement Based on Improved Unscented Kalman Filter
Authors: Liu Zhao Hua , Chen Jia Bin , Wang Yong , Song Chun Lei , Wang Jun , Feng Wei
Published: July 2011

Considering the control requirements of guided projectile, a novel method is studied that using three low-cost MEMS accelerometers as inertial measurement unit to construct state equation and measurement equation of system, using improved unscented Kalman filter (IUKF) to estimate the state of system. For the system characteristic of linear state equation and nonlinear measurement equation, the improved UKF nonlinear filter algorithm which combines KF and UKF was proposed. At the same time, utilizing minimal skew simplex sampling to reduce the number of sigma points, computational efficiency is enhanced. The simulation experimental results show that using IUKF algorithm can obtains good precision of estimation.
Appling Data Mining Technology to Analasis Clearance Efficiency in the Port Logistics
Authors: Wang Ya Qin , Song Yu Ming
Published: July 2011

Currently, monitoring customs declaration with limited examination of imported goods by available scarce resources poses considerable challenge to the customs authority worldwide. This a positive impact on international trade and foreign investment of a country to find out the limited factors of customs clearance, put forward the improved solution and enhance the efficiency of customs clearance efficiency of port logistics. This paper presents a classification model, which is a sort of data mining technology, to analyze the risk of commodity through customs clearance, and builds a classifier of customs inspection as the reference for customs inspection and monitoring. And the classification model based on BP neural network is established and evaluated through experiments, which are proved that a classification data mining method can be used for risk evaluation on customs clearance business to improve the customs inspection and monitoring.
Five-Axis Machining Center On-Line Inspection System Based on Workpiece
Authors: Sang Hong Qiang , Meng Jian Jun
Published: July 2011

Machining center on-line inspecting technology is an effective means that can improve precision and efficiency of machining center, which effectively integrates machining and inspection, makes machining center with partly inspecting function of coordinate measuring machines and improves the degree of inspecting automation compared with manual inspection and off-line inspection. Machining center on-line inspection system based on workpiece has been successfully developed and applied in SSK-U6035 five-axis machining center for palm inspection and control. The application result shows that machining center on-line inspection system based on workpiece can realize integration of machining and inspection more efficiently, increase precision and production efficiency, and reduce the rate of rejection and tool damage. At the same time, the on-line inspection system increases the additional function of the machining center for the manufacturer of machining center, improves the automation degree of the inspection and provides a new inspecting approach for other specific type’s workpiece.
An Affine Correction Algorithm for High Definition Rugged Paining Acquisition
Authors: Shi Xi Fan , Chen Xiang Hua
Published: July 2011

It is of great significance to digitize ancient paintings and calligraphy. A typical way to acquire them is photographing the painting block by block and then stitching the photos together. Currently, all the algorithms to register photos are based on affine transformation parameters estimation. But these kinds of solutions have great error when the painting is rugged and scanned at high definition. A ruggedness of only 5 millimeters and 300 PPI scanning will cause the stitching error of 17 pixels for the adjacent photos. In this paper, first, the correctness of affine transformation of corresponding point on photos of a planar object is proved. Then, for non-planar object, the error equation is conducted. After that, an algorithm to correct the error due to perspective projection is proposed. The key to correction algorithm is to compute the difference between the perspective projection and parallel projection. With it, a virtual photo of infinite focal length is generated and the error is eliminated.
A Location Fingerprinting Algorithm Based on RSSI Statistic Parameters Matching Estimate
Authors: Guan Wei Guo , Deng Zhong Liang , Ge Yue Tao , Yu Yan Pei
Published: July 2011

This study focuses on the indoor location system based on radio fingerprinting, and a grid positioning method based on weighted Euclidean distance matching by RSSI statistic parameters is presented in this paper. We analyze the principle of location fingerprint system and study the signal intensity distribution characteristics in indoor environment. According to the unsteadiness problem of the indoor signal strength caused by environmental impact, the positioning parameter model based on distributed grid is given. Moreover, the grid matching location algorithm is put forward based on the RSSI statistic parameters fusion estimation. Attributed to the proposed two-dimensional grid model, the algorithm is fit for the rapid matching calculations in continuous positioning case. Simulation results show that the approach has better robustness and accuracy, and it can effectively solve the problem of location estimates stability in general RSSI location fingerprinting system.
Simulation of Fuel Temperature of Diesel Engine Heating by PTC Materials
Authors: Li Xiao Lu , Gu Le Feng , Xu Cang Su , Li Ying
Published: July 2011

The PTC materials, as a kind of positive temperature coefficient materials, are used to heat diesel fuel in the high-pressure fuel pipe near the injector in Diesel engine, which have a lot of advantages, such as simple structure, safe and rapid heating, and fixed heating temperature around its Curie point. In order to study its heating effect on diesel fuel of the high pressure fuel pipe, the dynamical models for both the controlled object and PTC heater are presented by the way of lumped parameter, and the heating effects are also simulated and analyzed. The calculation results show that the diesel temperature is heated by the PTC materials effectively. Meanwhile, the heating law by PTC materials heating diesel fuel in the high pressure fuel pipe of engine is also summarized.
Sensitivity Analysis of Cost Parameters of Sequential Imperfect Preventive Maintenance Model and Applications
Authors: Wang Zhi Ming
Published: July 2011

Maintenance intervals and the optimal number of maintenance N*of NC machine tools in infinite time horizon are presented using a hybrid sequential imperfect preventive maintenance (PM) model. The failures of NC machine tools are described using Weibull process. Sensitivity analysis of cost parameters is given to show how the optimal results depend on the different cost parameters. The results show that when the shape parameter β of Weibull process within the range of [1.1,1.3], N* is slightly affected by β and cost ratio cr /cp. However, when the value of β is greater than 1.4, the effect of β and cr /cp to N* is significance. If an equipment is in wear later stage or PM actions are not too effective to it, it is not suitable to add the number of maintenance.
A New Oxygen Concentration Tester Design
Authors: Ren Li Jing
Published: July 2011

Now, the industries such as chemical industry is develop rapidly, and the requirement for the chrome of O2 is higher and higher. In this situation, it is important to measure the oxygen density with a portable and exact measure device. This article makes some study on a device for measuring the oxygen density, focusing on the principle of the testing, and the hardware and the software of the device. It proved that the system can work well.
Study on how to Control the Affect by Ironing Shrinking to the Size of Silk Garment in International Silk Garment Business
Authors: Zhao Mei Hua , Zhang Xiao Ping
Published: July 2011

As regarding silk garment, size is a very important factor in quality control in international trade. Garment size is affected by many factors of which ironing shrinkage is one of the most important. This assay discusses how to control the affect by ironing shrinking to the size of silk garment in international silk garment business.
A Boundary Tracking Method Based on Topological Relation & Region Growing
Authors: Wang Juan
Published: July 2011

This paper proposed a method to measure destructive pavement area based on region growing and topological relation. Firstly, separate the image of smeary area and calibrate plate area according to the image of topological relations. Then, the closed boundary could be achieved by utilizing the algorithms of region growing and boundary tracking, and the pixels in this area could be calculated. Finally, the practical area can be calculated through the ratio relation between the area and the calibrate plate. It’s demonstrated through experiments that the method has low time complexity and high robust.
Study on the Economy of Scale in Industry Based on DEA
Authors: Li De Qiang
Published: July 2011

Scale economic analysis is important in improving industries economic level and the industry competitive power. This paper uses DEA to analyze industry scale economy, and uses China's largest steel enterprise as an example. It shows this kind of analysis in industry scale economy analysis has universal applicability and efficiency.
Analyze on Construction Status Long-Span Arch Rib Bridge by Numerical Simulation
Authors: Hao Jiang
Published: July 2011

Non-cable hoisting frame is a construction method of the main arch ribs of big span bridge. The key issue in the numerical simulation of this type of bridge construction is geometric nonlinearity approach. Construction method of long-span bridge rib and stage-by-stage construction method of a arch bridge was simulated by finite element method. The geometric description was attained comparison with simulation results and the actual measurement of cable force. The results show that finite element method is effectively used in the simulation of long span arch bridge construction.
Analyze on Safety Evaluation of Masonry Arch Bridge by the Chain-Styled Theory
Authors: Hao Jiang
Published: July 2011

The mechanism of Masonry Arch Bridge is discussed by chain disaster theory in this paper. Result on Analyzing of the causes of disease reveals a complex chain relationships and the stage of disease development. Cutting chain detection, prevention and strengthening are proposed for safety evaluation of masonry arch bridge by the chain-styled theory. According to chain disaster theory, damage mechanism of Masonry Arch Bridge (Holly Bridge) is analyzed, and strengthening measures have been proposed.
An LMI Approach to Guaranteed Cost Control of Networked Control Systems with Nonlinear Perturbation
Authors: Xie Nan , Xia Bin
Published: July 2011

This paper is concerned with the problem of state-feedback guaranteed cost controller design for uncertain networked systems with both network-induces delay and data dropout taken into consideration. The sufficient condition for the existence of the networked guaranteed quadratic cost controller is obtained in terms of matrix inequalities, and the controller design method is deduced in terms of linear matrix inequalities. Furthermore, the suboptimal networked guaranteed cost controller design method is obtained with cone complementarity linearization algorithm. A numerical example is given to illustrate the proposed method.
Coupled Feedback Control of Chaos in the Qi System
Authors: Wang Jing Yue , Wang Hao Tian
Published: July 2011

The complex dynamics behavior of the four-dimensional Qi system is studied. The route to chaos of the system is studied by the time course diagram, phase portraits and Poincaré maps. We use a Coupled feedback strategy to control the chaotic motion towards regular motion. Numerical simulation shows the effectiveness and feasibility of the strategy to get rid of chaos by stabilizing the related unstable periodic orbit. This control method can be applied to other chaotic systems.
Comparison and Research of LED Screen’s Image Quality Optimizing Technology
Authors: Zhao Xiao Ming , Zhou Xiao Yuan , Yuan Sheng Chun
Published: July 2011

This paper compares and analyzes various common sub-pixels layouts in the outdoor LED (Light Emitting Diode) display industry. According to the basic principles of chromatics and the instructions about central wavelength of LED lamps, proposed that the ratio (2:1:1) of the red, green, blue lamps in one display unit of the 4-subpixels arrangement should be changed to 1:2:1 to improve the clarity of the screen. Besides, to solve the chaotic situation of relating technologies, the paper proposed that optimizing technologies of image quality around LED screen can be classified into two groups based on sub-pixels layouts---centralizing and dispersing evenly.
The Concurrent Development of the Multi-Stationed Progressive Die of the Micro-Motor Rotor and Stator
Authors: Yuan Hong Ling
Published: July 2011

This essay discusses the necessity of introducing the concurrent engineering into the multi-stationed progressive die development and the relative procedures. And the detailed multi-stationed die progressive development of the rotors and stators on the micro-motors is provided. And the conditions of the concurrent development on the multi-stationed die are offered.
Research of Resource Matching Algorithm Based on Incentive Mechanism and Penalty Mechanism
Authors: Lu Yi Hong , Sun Liang , Huang De Cai
Published: July 2011

Existing incentive mechanisms mainly describe the fuzzy index such as local credit with integer, which can’t avoid distortion of the description. Because Vague set can describe and process fuzzy information very well, this paper uses credit, that is represented by Vague set, to describe the resource nodes’ credibility, and introduces corresponding incentive mechanism and penalty mechanism to update the credit of resource nodes, in order to decrease the vicious nodes’ harm to resource discovery and encourage more good resource nodes to join in the grid. Finally, this paper improves the resource matching algorithm which is based on Vague set with incentive mechanism and penalty mechanism. Simulation test demonstrates that the introduction of incentive mechanism and penalty mechanism increases the resource matching algorithm’s capability of discovering resource obviously.
Study on Kinematics-Based Symbolic Computation–Driven Quadruped Robot Gait Simulation System
Authors: Song Hong Jun , Rong Xue Wen , Li Yi Bin , Ruan Jiu Hong
Published: July 2011

The paper presents a dedicated kinematics-based simulation system for quadruped robot gait study, named as TQRSS. The system employs Ginac’s symbolic computation technology, making it possible on-line planning and help concentrate on robot gait planning and parameter adjusting. The Taishan quadruped robot’s kinematics analysis is also presented.
Study on the Optimization of Fermentation Conditions for Actinomycete F10
Authors: Yang Lei , Zhou Guo Ying , Song Guang Tao
Published: July 2011

In order to improve the yield of antimicrobial substances extracted from actinomycetes F10 strains fermentation, antimicrobial activity and cell dry weight were taken as the main indicators, we studied the effects on F10 strain’s biological activity of the different fermentation media, different carbon, nitrogen and other nutrients factor, and the initial pH and other non-nutritional factors. The results showed that the optimum fermentation medium is: yeast extract 0.5%, glucose 1%, KH2PO4 0.1%, NaCl 0.1%, CaCO30.3%, pH natural. Strain F10 optimal fermentation conditions were: initial pH 7.0, fermentation time 168h.
Developing a Framework for Integration Manufacturing Systems Based on PLIB Ontology
Authors: Zhou Gui Xian , Liang Min
Published: July 2011

The model of service resource based on ontology is referred to meet the demand of flexibility and re-configurability of enterprise application resources. PLIB Ontology as new entrants with new business models pour into the business-to-business space, it's increasingly difficult to make sense of the landscape. The paper analyzes the current situation of business environment and business intelligence systems integration at first. Through requirement analysis, we think PLIB ontology is fit for the solution of these requirements (unambiguous description, integration automatically, variant design in real time etc). Then a generic conceptual framework will be developed and a prototype implementation of the generic concepts will be benchmarked in system design of business intelligence systems. It can help confirm the keystone of the construction of business intelligence systems and the direction of system integration.
Research Based on Information Fusion of Safety Risks Prediction and Control Management in Construction
Authors: Zhao Ping , Zhang Hu
Published: July 2011

Safety risks management of safety potential information and hazard sources has been taken in Construction process. It is the most important measure to solve the current situation that safety accidents is frequent in Chinese Construction projects. The main reasons of frequent accidents were find out and the D-S evidence theory of multi-source information fusion method was used to reduce the accident rate in Construction safety in this paper. Through analyzing and predicting the engineering data and information in human, machine, environment and management four aspects in Construction, prediction model was built in Construction safety risks management, the possibility of dangerous and harmful level in the construction project can be known, preventive measures for specific situations were taken and promptly the safety state of the Construction will be ensured.
The Influence of Stirring Time on Mechanical Properties of Sn–58Bi Alloy Treated in the Semi-Solid State by Mechanical Stirring Process
Authors: Hu Yong Jun , Li Yong , He Jian Nan , Cheng Xiao Ling , Li Feng , Xiao Xiao Ting , He Yuan Chuan , Zhong Bin Qiang , Zheng Chun Chun , Zheng Yu Chuan , Wu Yu Chi
Published: July 2011

In this paper, the technology of semi-solid casting was to used are produced Sn-Bi alloy. The influence of agitating time at 125 °C on the microstructure and mechanical properties of of Sn-58Bi casting alloy were discussed. The eutectic Sn-Bi alloy was mechanically agitated during the casting solidification process. The results indicated that non-lamellar Sn-Bi structure with long plate shape, short strip, small size block and suborbicular block shape Sn phase was obtained for different stirring time. The elongation of Sn-Bi alloy with non-lamellar eutectic structure is improved prominently. Compared with the elongation of lamellar eutectic Sn-Bi alloy prepared by conventional die casting, the elongation of semi-solid Sn-Bi alloy with suborbicular block shape Sn phase is enhanced up to 45%.
Optimization of Goose Meat Composite Tender Agent by Response Surface Methodology
Authors: Gao Hai Yan , Xu Ya Ping , Ma Han Jun , Pan Run Shu , Li Bin
Published: July 2011

In this study, the goose meat was used as raw material and the formula of composite tender agent was optimized by Response Surface Methodology. Goose breast meat were soaked with exogenous protease of plants, phosphate and Ca2+ for 3 hours at 2 °C. The influence of different composite tender agent on the water-holding capacity was examined by statistical response surface methodology (RSM). The result showed that papain 6.16 U/g, compound phosphate 0.308 % and calcium chloride 0.133 % was helpful to increase the tenderization of goose breast. The results of our study would be used to improve the tenderness of goose meat and increase economic efficiency of goose industry.
The Working Principle and Main Technical Factors Influencing on Finished Accuracy of Rapid Prototyping
Authors: Liu Ji Bao , Wang Di , Li Xiao Jing , Gao Zhi Hua
Published: July 2011

Rapid prototyping (RP) is a digital manufacture technology based on discrete stacking technology. RP technology can be used to machine complex physical part directly from CAD data without any professional apparatus. The paper also summarized four main RP technologies, discussed the working principle and compared the application fields, machining cost and process parameters in detailed. Finally, the author prospected the significant performance of RP for modern industry, analyzed the merits and faults and indicates the development object for RP technology.
Realize Automatic Incremental Change to Field by Form Pattern
Authors: Geng Jun Bao , Qiao San Bao , Sun Lin Kai
Published: July 2011

Some data in the field of the database often need to be automatically increased in many applications. It is presented in this paper that the increase can be realized by form pattern, which can get over the shortcoming of the meanings that present database adopts autonomous increase field or sequence. The method is proved feasible and easy by which is developed and used in some ship management and information system.
Numerical Study on Temperature Distribution of Classroom with Hybrid Ventilation
Authors: Xu Shu Hui , Dong Hai Guang , Li Wen Fang
Published: July 2011

Air quality is very important for classrooms where high density of students study for long time. Enhanced ventilation is an idea way to introduce more fresh air to classroom. Hybrid ventilation combined natural ventilation with mechanical ventilation is a economic way for ventilation improvement. factors Influencing hybrid ventilation such as heat source intensity, location of air inlet, air velocity were studied by simulation in this paper. The characteristics of temperature distribution of the classroom were also analyzed. The simulation research was validated by model experiments. A low position of air inlet in the room makes high temperature efficiency, the optimal value of the air inlet velocity is about 0.5 m/s.
Synthesis and Characterization of the Y/MCM-41 Composite Molecular Sieves
Authors: Wang Li Qin , Yang Xiang Ni , Han Yang , Yu Ning , Zhao Xiu Li
Published: July 2011

The Y/MCM-41 composite molecular sieves were synthesized in the method of hydrothermal crystallization with cetyltrimethylammonium bromide (CTMABr) as the template agent. The as-prepared composite molecular sieves were characterized by the means of X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), the thermogravimetric and differential thermal analysis (TG-DTA) and the nitrogen adsorption test. The experimental results were shown as follows: the Y/MCM-41 composite molecular sieves kept properties of Y-zeolites and MCM-41 molecular sieves. In the XRD and FT-IR spectra, it can be found both characteristic peaks of Y-zeolites and MCM-41 molecular sieves. The pore size distribution plot indicated that the Y/MCM-41composite molecular sieves had micro-mesoporous structure, and the average pore size were about 1.5 nm and 15 nm. The decomposition temperature of the template agent was at 320 °C, and the calcined temperature of Y-zeolites was at about 560 °C. There showed an endothermic process constantly in the DTA curve, and there was little mass loss in the TG curve, indicating the obtained Y/MCM-41 composite molecular sieves had higher thermal stability.
Weld Seam Recognition Based on Wavelet Analysis Algorithm
Authors: Huang You Rui , Zhao Na Na
Published: July 2011

Vision sensor for weld seam location and seam tracking is developed. It is difficult for realizing picture precise identification based on machine welding at present, the image recognition algorithm based on wavelet analysis is designed in this paper. It uses immune genetic algorithm to optimize wavelet coefficient, and extracts the edge of picture preferably. In the process of detecting edges, compared with the others, the algorithm can inhibit the interference of noises effectively and remove artifacts of edges, which make the detected edge clearly and carefully. The result shows that the wavelet analysis algorithm has better effect for weld seam recognition.
From Digital Mine to Smart Mine
Authors: Ge Xiao San , Zhang Yu Min
Published: July 2011

Digital mine is the extension of digital project used in mine, there still remains some problems to be solved. Especially， in the intelligent application in digital mine construction, “Smart engineering” is new ideal employed new technologies which make our live more smart. This paper proposed smart mine concept and ideal, which is the top level application demands of mine enterprise, and plays important roles in the future intelligent mine production. The focus of the study is on the smart mine construction built on the ‘smart’ combination of many new technologies and its contents on the basis of digital mine.
Microstructures and Mechanical Properties of Troostite Nodular Cast Iron by Heat Treatment
Authors: Liu Ke Gao , Xu Ai Min
Published: July 2011

A troostite nodular cast iron was obtained by a heat treatment process of controlled cooling, reheating-up and isothermal treatment. Experimental results show that the troostite substrate demonstrates an interlamellar spacing below 100 nm. The supercooling condition in this specific heat treatment process is key to the formation of troostite. The mechanical properties are excellent, with tensile strength of 905.5~1029.5 MPa, hardness of 30.8~32.8 HRC, and elongation of 3.1~4.0 %.
Py-GC-MS Analysis on Benzene-Alcohol Extractives of Phyllostachys pubescens for Biomedical Engineering
Authors: Ma Qing Zhi , Wu Feng Juan , Zhang Dang Quan , Peng Wan Xi
Published: July 2011

In order to evaluate its potential biomedicines, the extractives of Phyllostachys pubescens were extracted and determined by Py-GC-MS. And the main constituents were 1-phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro-1,4a-dimethyl-7-(1-methylethyl)-(% 7.02), stigmast-5-en-3-ol, oleate(4.33%), 4,4,6a,6b,8a,11,11,14b-octamethyl-1,4,4a,5,6,6a,6b,7,8, 8a,9,10,11,12,12a,14,14a,14b-octadecahydro-2h-picen-3-one(3.39%), etc. So the benzene-alcohol extractives of Phyllostachys pubescens could be used for biomedical engineering.
Analysis on Health Risk of Extractives of Cinnamomum camphora by Py-GC-MS
Authors: Pang Yan , Wang Zhong Wei
Published: July 2011

In order to evaluate its potential health risk to food, Py-GC/MS was used to analyze the high-grade resource recovery of benzene/ethanol extractives of the Cinnamomum camphora wood. Relative content of each component was determined by area normalization. The main constituents were hexadecanoic acid, oleic Acid, octadecanoic acid, 4-chloro-2-fluoroaniline, cyclohexane, 1,1-dimethyl-, 7-heptadecene, 17-chloro-, brucine, ergosta-4,6,22-trien-3.beta.-ol, etc. So the benzene/ethanol extractives of Cinnamomum camphora could be used as materials of biomedicine.
Determination of Bioactive Components of Oil-Tea Cake by Pyrolysis- GC/MS
Authors: Liu Qi Mei , Zhang Dang Quan , Peng Kuan , Peng Wan Xi
Published: July 2011

The oil-tea cake is the particular byproduct during producing tea-oil from seeds of Camellia oleifera (oil-tea tree). However, the current processing and utilization of oil-tea cake is still low economic benefit and also low value-added. Therefore, 300°C-based pyrolysis- GC/MS technology was used to analyze the top value-added bioactive components of benzene/ethanol extractives of oil-tea cake. The analytical result showed that 14 peaks were obtained from the 300°C pyrolyzate of benzene/ethanol extract of oil-tea cake, and 13 compounds representing 99.16% of the total areas were identified. The MS analytical result showed that the main components of pyrolyzates of benzene/ethanol extractives of oil-tea cake by 300°C pyrolysis- GC/MS were identified as: ethyl oleate; 14-pentadecenoic acid; pentadecanoic acid, ethyl ester; hexadecanoic acid, 2-hydrsoxy-1,3-propanedryl ester; pentadecanoic acid, ethyl ester; squalene; 1,2-benzenedicarboxylic acid, butyl 2-methylpropyl ester; 1,2-benzenedicarboxylic acid, 3-nitro-; etc.The results of function analyses showed that the 300°C pyrolyzate of benzene/ethanol extractives of oil-tea cake contains abundant bioactive components of rare natural medicinal materials, and also contain many components which can be developed into two value-added materials of industrial chemical and high-grade spice.
Effect of the Extract of Fructus tribuli on Growth of Lactobacillus acidophilus
Authors: Shu Guo Wei , Chen He , Qin Tao , Ma Qi
Published: July 2011

Effect of the extract of Fructus tribuli (EFT) on growth of Lactobacillus acidophilus LA04, LA05, LA06 and LA09 was studied by measuring optical density at 600nm (OD600) and pH using MRS culture media as the control. The addition of EFT (v/v) was 1%, 2%, 3%, 4% and 5%. Results were as follows: addition of EFT could promote the growth of Lactobacillus acidophilus LA09, The optimum concentration of EFT in MRS media was 1% at incubation 24h, but addition of EFT on growth of Lactobacillus acidophilus LA04, LA05 and LA06 has no significant effect.
High-Grade Utilization of Recovering Wastewater from Cinnamomum Camphora Oil
Authors: He Gong Xiu , Zhang Dang Quan , Guo Lin Lin
Published: July 2011

The production of noble Cinnamomum camphora oil from C. camphora leaves and twigs brings a mass of extracting wastewater which is pollutive to water environment. In order to better utilize and recover the productive wastewater from the Eucalyptus oil, we used GC/MS to analyze the possible top value-added components of benzene/ethanol extractives of leaves and twigs of C.camphora. The analytical result showed that only 15 compounds were identified from the benzene/ethanol extractive of C. camphora trigs, and 29 compounds from 30 peaks were identified from the benzene/ethanol extractive of C. camphora leaves. The analytical result showed that the main components of the benzene/ethanol extractive of C. camphora twigs by GC/MS are as: Bicyclo[2.2.1]heptan-2-one, 1,7,7-trimethyl-, (1R)- (36.85%), Linalyl propanoate (23.58%), Eucalyptol (10.07%), 1,3-Benzodioxole, 5-(2-propenyl)- (8.88%), 4,4-dimethylcholest-7-ene-3-ol (5.81%), Cyclopentanol (3.37%), 1,2,4-Cyclopentanetrione, 3-(2-pentenyl)- (2.52%), etc. The result by GC/MS analysis showed that the benzene/ethanol extractive of leaves of C. camphora are as: Eucalyptol (58.51%), 3-Cyclohexene-1-methanol, .alpha.,.alpha.4-trimethyl- (13.98% from two peaks), Sabinene (4.45%), 1-Mercapto-2-heptadecanone (2.69%), Phytol (2.29%), Camphene (1.94%), 1-Eicosanol (1.81%), Caryophyllene (1.63%), 1,3-Benzodioxole, 5,5'-(tetrahydro- 1H,3H-furo[3,4-c]furan-1,4-diyl)bis-, [1S-(1.alpha.,3a.alpha.,4.beta.,6a.alpha.)]- (1.50%), 1-Penten- 3-ol (1.01%), beta.-Pinene (0.86%), etc. There are many important constituents of rare natural medicine, cosmetic and spicery in the benzene/ethanol extractive of twigs and leaves of C. camphora.
Flexural Behaviour of RC Beams Strengthened with Prestressed CFRP Plates：Comparisons of Bonded and Unbonded Method
Authors: Deng Lang Ni , Zhang Peng , Chen Hua
Published: July 2011

In this study, a total of 5 CFRP-strengthened reinforced concrete beams were tested in flexure based on the independent development prestressing anchorage system. The various variables included bonding or no bonding of the CFRP and the amount of prestressing. The experiments consisted of one control beam, two prestressed CFRP-unbonded beams, and two prestressed CFRP-bonded beams, all the beams were subjected to four-point bending tests. The ultimate load, deformation, and CFRP strain were examined. The aim of this investigation was to study the flexural performance of reinforced concrete members strengthened using CFRP plates, employing different CFRP bonding and prestressing methods. The failure mode of the prestressed CFRP-plated beams was not debonding, but concrete crushing or FRP rupture. For the reinforced concrete members strengthened with externally bonded prestressed CFRP plates, after the debonding of the CFRP plates that occurred in the bonded cases, the behaviour of the bonded CFRP-plated beams changed to that of the unbonded CFRP-plated beams due to the effect of the anchorage system. The ductility indices of the beams in an unbonded system were less than that of those in a bonded system.
CFD Simulation for the Resistance Performance of 1000 Dwt Deep-Vee Vessels on Bulbous Bow
Authors: Xie Yi , Zhao Hua , Fan Xiao Bin , Jian Hua Jun
Published: July 2011

Resistance influence factors of bulbous bow are analyzed with three 1000dwt displacement types Deep-vee forms provided. The free surface viscous flow of these forms is calculated by air-water two phases RANS equations with RNG turbulence model and volume of fraction method. Total resistance, pressure distribution and wave profile of hull are presented. Some results can be taken as follows: Adopted longer protruding length can improve the resistance character at medium high speed and ameliorate the resistance performance in calm water at low speed to design a 1000dwt deep-vee vessel; the bulbous bow wavemaking is only one of the reasons to influence the wavemaking resistance of hull. The importance influence factor of hull wavemaking resistance is how to form advantage disturbance or least disadvantage disturbance between the bulbous bow wave and hull wave.
Cyclic Deformation Behaviour of China Railway Grade B Cast Steel Wheel
Authors: Zhao Yong Xiang , Song Guo Xiang
Published: July 2011

Cyclic deformation behaviour is experimentally investigated using an incremental step method under a spectrum straining block loading mode for China grade B cast steel wheel. Results reveal that the material acts cyclically as non-Masing behaviour with a Bausinger effect. Different from monotonic tensile situation, material under fatigue loads was subjected to a plastic dissipation process without a yielding sign. Fatigued areas of specimen fracture surfaces are around 35%. Cyclic stress-strain (CSS) curve exhibits constant lower than monotonic tensile curve. Difference is enlarged as strain level increasing in elastic regime of the monotonic deformation. And this difference sustains a level of around 100 MPa as over yielding point. In addition, randomness is also observed for the present cyclic deformations. It indicates that random CSS relations should be comprehensively applied even if under stress based fatigue analysis.
Analytical Expression of T-vC Dependence in Standard ISO 3685 for Cutting Ceramic
Authors: Panda Anton , Duplák Ján , Jurko Jozef
Published: July 2011

Durability is very important property of every cutting material. This property of cutting materials defined theirs life-time. Technical science defines a lot of different factors, that they may be cause of shorter life-time of cutting tool. Maximally possible elimination of these factors is necessary for optimization of cutting materials life-time. Durability of cutting materials is defined in standard ISO 3685. The main part of standard ISO 3685 is T-vc dependence definition for selected cutting materials. One of these cuting materials contained in this standard is cutting ceramic. Standard ISO 3685 contains instructions how to create T-vc dependence for cutting tools made of cutting ceramic. In this standard are only instructions how to create T-vc dependence according to Taylor, but last part of every experiment is analytical expression of tested dependence. The article describes process how to define and analytically express T-vc dependence for cutting ceramic (Al2O3).
Experimental Research on Dynamic Characteristics of Synthetic Jet Induced by SJA with HCPCS Membrane
Authors: Zhou Yong , Wang Bang Feng , Wang Wei , Cheng Yong , Wang Feng
Published: July 2011

A new half cymbal style piezoelectric-metal composite structure (HCPCS) membrane is proposed and utilized for piezoelectric synthetic jet actuator (PSJA) to increase its output jet velocity. PSJA specimens with both plane and HCPCS membranes were manufactured. An experimental system with hot-wire anemometer was setup to test the jet velocity. The frequency responses of time-averaged jet velocity were measured for both HCPCS diaphragms and plane membranes. The time-averaged velocity distributions were collected along the exit centerline. Experiments indicate that the HCPCS structure brings a promotion of vibration displacement distortion of diaphragm and stronger driving capability, and that the mean jet velocities synthesized from the optimal HCPCS PSJAs are higher than the optimal plane membrane one. Hilbert-Huang Transform was employed to analyze the instantaneous energy distribution characteristics of the jet. The analysis was done for signals along the centerline. The results show that HHT is an effective method for fluid field analysis.
Research on PLC-Based Automatic Liquid Pig-Feeding System
Authors: Xu Ming
Published: July 2011

The automatic pig-feeding system gains more and more attention on the urgent need of improving pig-feeding efficiency and reducing labor intensity. An integrated automatic pig-feeding system is presented. It includes two sets of feeding-mechanisms and feeding-tanks which can work together so as to improving feeding efficiency. A drug-tank is integrated to complete the task of pig diseases control and prevention. And a buffer-tank is also integrated to save the remaining diet in the pipeline after feeding process. The whole system has a compact structure as well as fully functions. In addition, the fully automatic pig-feeding process is implemented using PLC and monitoring software. The experiment results show that this system can improve feed efficiency and reducing labor intensity greatly.
Scatter Correction Method for Cone Beam CT Using Beam Attenuation Grid
Authors: Xie Shi Peng , Luo Li Min , Yang Li Feng , Zhang Feng
Published: July 2011

The scattering phenomenon has an important influence on the reconstructed image in Cone Beam CT (CBCT) imaging systems, and is a long-lasting research topic on CBCT. Focusing on the scatter artifact in the cone beam CT system, we proposed a new scatter correction method that needed to add a beam attenuation grid (BAG) between the X - ray source and the tested object. This study educed the scatter correction algorithm based on the Beer theorem. Through subtracting the scatter distribution image from the original projection image, we can acquire the scatter-corrected projection Images of the tested object. The method has been verified by preliminary experimental results on phantom. The result showed that the method can effectively reduce the scatter artifacts, increase the image contrast and increase the quality of the reconstructed slice image. This method is computationally efficient and easy to implement without the loss of real-time imaging capabilities.
Fatigue Reliability Curves for China Railway Grade B Cast Steel Wheel
Authors: Liang H.Q. , Zhao Yong Xiang , Li Y.
Published: July 2011

Four grouped rectangle specimens with thirty four samples, plus eighteen samples for fatigue limits, are tested for constructing the fatigue reliability curves of China grade B cast steel wheel. It reveals that fatigue cracks commonly initiated from the surface weakest phases and grew with typical fatigue striations and sub-cracks perpendicular to the growth direction. Cyclic plastic seems to be strengthened as cyclic stressing level increasing. Fatigue reliability curves are constructed on a consideration of addressing the real super long life. They are evaluated by a concurrent probability extrapolation method. And the measured curves verified that appropriate description has been reached on the test data.
Random Fatigue Cracking Thresholds of China Railway Grade B Cast Steel Wheel
Authors: Yang Bing , Zhao Yong Xiang , Song Guo Xiang
Published: July 2011

Fracture surface observations and statistical deriving are applied experimentally for the present investigation on random fatigue cracking thresholds of China grade B cast steel wheel. Results reveal that: the crack grows with relative regular initial tip companied fabric like stripes along the growth direction but few of fatigue striations and then, cleavage flowers appearing on the district of transient fracture with few of dimples. This indicates that sharp notched structures may be subjected to a little plastic dissipation process. In the same time, non-linear statistical modeling is constructed for describing the random crack growth and then, random fatigue cracking thresholds are measured at specified growth rate. The measurements hold a same growth rate which can not be obtained directly from test results.
Research on Application of Network Education Technology in Mathematics Teaching of Higher Vocational Institutions
Authors: Hu Xian Fu , Huang Jiang
Published: July 2011

The integration of network education technology and mathematics curriculum has become the hot issue of mathematics teaching reform in higher vocational education institutions. The paper has emphatically introduced the construction situation and implementation process of network education in advanced mathematics. Through investigation and statistical analysis on network education teaching effect, it verified that network education has the superiority that the conventional education cannot match. However, each teaching model has its own advantages and disadvantages. Finally, based on the teaching practice, the paper made some suggestions and countermeasures on further development of network education, and provided the valuable teaching experimental basis for the mathematics educators.