bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Simulation of Temperature for Al2O3 Ceramics during Micro-Detonation of Arc Strike Machining
Authors: Tian Xin Li , Lin Ke Ling , Zhang Bao Guo , Xue Chun Fang , Wang Jian Quan
Published: January 2012

A theoretical model of temperature for Al2O3ceramics during micro-detonation of arc strike machining was established. Based on finite element theory, the temperature of Al2O3ceramics during micro-detonation of arc strike machining was simulated with the aid of Ansys software, combined with the actual processing, the width and depth of cavity impacted by micro-detonation were calculated. The simulation results show that the highest temperature of Al2O3ceramics is over 13435 °C in a given processing parameters, while the high-temperature zone is quite small. With the increase of pulse width and electricity, the temperature within the machined zone increases rapidly, but the outside area kept a low temperature; and with the increase of nozzle radius, the diameter to depth ratio of the distribution of temperature is increasing gradually. The data gained from the simulation is proved to be accordant with the data gained from experiments.
Effects of Vision Clues on Spatial Cognition of Mice
Authors: Zhou Zan , Chang Jun Li , Xie Min , Liao Xiao Mei
Published: January 2012

To investigate the effect of vision clues on spatial cognitive ability of mice, 20 healthy Mus musculus (Km) mice were divided into two groups, control group and test group. During the experiment, the control group was trained in the Morris water maze with the visual signals while all the visual reference objects of Morris water maze were removed when the test group was trained. The latencies and swimming paths of the two groups were recorded for comparing the effect of vision clues on spatial cognitive ability of the mice. The results showed that there was no significant difference of swimming speed between the two groups, but both the latencies to find the hidden platform and swimming paths of the test group increased notably compared with the control group during the place navigation testing and probe trial testing (P＜0.05). According to these results, we concluded that vision clues played a critical role on the spatial cognition ability of mice. If the visual reference objects of Morris water maze were removed, the spatial cognitive ability of the mice would decrease, the latencies increased significantly and swimming paths became long and disorder.
A New Type Device of Detecting True and False Coin
Authors: Yu Chun He , Zhang Chao , Bai Ying
Published: January 2012

In order to reduce the loss of an automatic coin machine for using a 1-Yuan false coin, a new device is designed by applying the eddy current nondestructive testing technology. The device includes four modules: LC oscillating circuit module, signal processing module, microprocessor module and external control circuit module. The device identifies false coins by the frequency changing quantity of the circuit oscillation. For overcoming temperature drift, component aging and environment disturbance, the algorithm adopts the technology of background frequency updating and Median filter. The experiment shows the device has the character of stability, reliability and high accuracy.
Topology Optimization on Bracket Side Panel of Beach Cleaner’s Dumping Device
Authors: Zou Rui Rui , Fan Zeng Wei , Ge Xiao Hong , Guo Gang
Published: January 2012

According to the typical working conditions of beach cleaner, which come from the result of the virtual prototyping model’s simulation analysis. Establish the optimal topology design of the bracket side panel of the dumping device by ANSYS software. Compare the results before and after optimization, we conclude that, the bracket side panel has been not only reduce by 17.1% in mass under meeting the strength and rigidity requirements but also improved its welding technology. At the same time, this paper can provide reference for the lightening design and manufacturability improvement of complex loading parts.
Structure Design and Interference Analysis of Walking Aids
Authors: Zhang Jun Xia , Cao Sai Sai , Wang Wei Wei
Published: January 2012

The overall program of the walking aids which is designed to assist patients with lower limb paralysis to walk again is analysed in this paper. A detailed analysis and design is conducted especially for ball screw driving system.A three-dimensional prototype model of the walking aids is established and interference analysis is carried out in CATIA. The results show that the model dose not appear interference,and the structure is reasonable,which could determine the movement. The study results could provide a reference for the structure design and walking control of exoskeleton and humanoid robot and lay a solid theoretical basis for the achievement of a real sense of walking auxiliaryfuction.
The Stress Relaxation Characteristic and Martensitic Transformation of Fe-Mn-Si Shape Memory Alloys under Different Deformation Condition
Authors: Liu Lin Lin , Lin Cheng Xin , Zhou Chao Yu
Published: January 2012

The stress relaxation characteristic and martensitic transformation in Fe-Mn-Si shape memory alloys under different deformation condition are studied by X-Ray Diffraction (XRD) analysis and TEM observation. The results show that the amount of stress induced ε martensitic quickly increases when the suspending loading time below 10min (0~10min), and the increasing speed of ε martensitic gradually become slower when the suspending loading time above 10min. This is owing to the stabilization of stress induced ε martensitic. The stress relaxation ratio of Fe-17Mn-5Si-10Cr-5Ni and Fe-17Mn-5Si-2Cr-2Ni-1V alloys increase with increasing the suspending loading time, and the relaxation ratio of Fe-17Mn-5Si-2Cr-2Ni-1V alloy is obviously lower than that of Fe-17Mn-5Si-10Cr-5Ni alloy.
Application of Random Medium Model in Analyzing Surface Settlement Caused by Pit Excavation
Authors: Yin Guang Ming , Fu He Lin , He Yi Wu , Ouyang Da Ren
Published: January 2012

Random medium theory is introduced in this paper. It derived the vertical and horizontal displacement of the surface subsidence with the random medium theory, which caused by excavation, and integrated the overall surface displacement. It was verified with practical examples. The results can provide technical information for the excavation and supporting.
Analysis of Quality Accidents Arising from Common Interactions in Projects
Authors: Li Ju Wen , Zhu Xu Ping
Published: January 2012

This paper has analyzed the quality accidents in interaction between of superstructure with foundation and subgrade, and demonstrated by examples that the interaction among the three is an indispensable key factor in foundation investigation, engineering design and construction.
A Research on Environmental Issues Applied to the Hotel Industry
Authors: Yue Ya Fan
Published: January 2012

Tourism is often viewed as the availability of a clean natural environment without the pollution as the industry, but the hospitality industry, due to its very specific function, operating characteristics and services provided, consumes substantial quantities of energy, water and non-durable products. The resulting environmental impacts of hospitality facilities are thus characteristically greater than those caused by other types of buildings of similar size in China. In recognition of environmental degradation, governments, along with the green movement within the hospitality industry, and travellers, have become increasingly aware of the need for more effective measures to protect the environment. In order to achieve noticeable improvement, the managers and operators of the hospitality industry should be willing to act in an environmentally responsible manner. They also need to have adequate knowledge of the environmental issues pertinent to their activities, and sufficient funds to implement state-of-the-art environmentally sound practices.
Study on Synthesis and Application of Superplasticizer from Chitosan
Authors: Lv Sheng Hua , Duan Jian Ping , Gao Rui Jun , Cao Qiang
Published: January 2012

Sulfonated chitosan (SCS) was prepared from chitosan and sulfuric acid via sulfation reaction. SCS was used as superplasticizer in cement. The test showed that the maximum fluidity of the cement paste was 232 mm with dosage of 0.75 wt % at water to cement ratio (w/c) of 0.29. Meanwhile, lesser loss of fluidity and slump over 60 mins were observed comparing to naphthalene sulfonated formaldehyde condensates (NSF). A well-distribution of cement particles can be seen from the image of SEM in the sample of mortar prepared by SCS. The water reduce ratio of SCS reach 19.2 %. The applied results showed that SCS could slightly improve the mechanical properties of mortar. The paste fluidity, mechanical properties and slump loss of the cement paste incorporated SCS indicated that it can be used as superplasticizer in concrete.
The Research of Self-Organizing Maps Based on Document Collections
Authors: Ding Yi , Fu Xian
Published: January 2012

Web text mining is a new issue in the knowledge discovery research field. It is aimed to help people discover knowledge from large quantities of semi-structured or unstructured text in the web. Several approaches, including some pure and hybrid information retrieval (IR) methods, have been proposed to tackle such an issue. Among these approaches, combining the Self-Organizing Map (SOM) method with the principles of the vector-space model, appears to be a promising alternative for the traditional purely IR-based methods in this problem domain. The encoded documents are organized on another self-organizing map, a document map, on which nearby locations contain similar documents. Special consideration is given to the computation of very large document maps which is possible with general-purpose computers if the dimensionality of the word category histograms is first reduced with a random mapping method and if computationally efficient algorithms are used in computing the SOMs.
Study on the Degradable Mulch Sheet Papermaking Technique
Authors: Gao Yu Jie , Liu Hong Juan , Li Min
Published: January 2012

The current paper studies the technology used in making mulch sheet out of softwood pulp. The best technology for mulch sheet manufacturing is determined by studying the effect of the beating degree, quantitation of the base paper, dosage, and usage of the Polyamide epichlorohydrin condition for the base paper properties. The transparency is found to be very good after the base paper is steeped in a self-made transparent agent. Degradability experiments conducted on soil suggest that the mulch sheet is completely degradable.
Characteristics of Wall Thickness Increase in Pipe Reduction Process Using Planetary Rolls
Authors: Kotani Yuji , Kanai Shunsuke , Watari Hisaki
Published: January 2012

In recent years, global warming has become a worldwide problem. The reduction of carbon dioxide emissions is a top priority for many companies in the manufacturing industry. In the automobile industry as well, the reduction of carbon dioxide emissions is one of the most important issues. Technology to reduce the weight of automotive parts improves the fuel economy of automobiles, and is an important technology for reducing carbon dioxide. Also, even if this weight reduction technology is applied to electric automobiles rather than gasoline automobiles, reducing energy consumption remains an important issue. Plastic processing of hollow pipes is one important technology for realizing the weight reduction of automotive parts. Ohashi et al. [1-2] present an example of research on pipe formation in which a process was carried out to enlarge a pipe diameter using a lost core, achieving the suppression of wall thickness reduction and greater pipe expansion than hydroforming. In this study, we investigated a method to increase the wall thickness of a pipe through pipe compression using planetary rolls. The establishment of a technology whereby the wall thickness of a pipe can be controlled without buckling the pipe is an important technology for the weight reduction of products. Using the finite element analysis method, we predicted that it would be possible to increase the compression of an aluminum pipe with a 3mm wall thickness by approximately 20%, and wall thickness by approximately 20% by pressing the hollow pipe with planetary rolls.
Researching and Production Technology of Golden Yellow Microcrystalline Glass
Authors: Zheng Shu Ping , Chen Xuan , Zhao Bao Hua
Published: January 2012

The golden yellow marble sheet material pure like jade is very rare in nature. Many sheet materials have some flaws such as radiation, chromatic aberration, color bleeding, staining easily and acid etching, especially in China lacking high-quality yellow marbles. The research and development of golden yellow microcrystalline glass aim to produce golden yellow microcrystalline glass using common quartz sands and calcium carbonates can be found anywhere as main materials, and the product is an economical and environmental material compliant with national policies with great market potentials and investment & development prospect.
The Applications of Group Theory
Authors: Guo Xiao Qiang , He Zheng Jun
Published: January 2012

Since the classification of finite simple groups completed last century, the applications of group theory are more and more widely. We first introduce the connection of groups and symmetry. And then we respectively introduce the applications of group theory in polynomial equation, algebraic topology, algebraic geometry , cryptography, algebraic number theory, physics and chemistry.
Formation Reason and Improvement Measure for Surface Defects of 0Cr18Ni10Ti Stainless Steel
Authors: Wang He Li , Li Hua Bing , Ma Qi Feng , Jiang Zhou Hua
Published: January 2012

The formation reson of the surface defect of 0Cr18Ni10Ti after rolling is analyzed, some improving solutions are performed for avoiding the surface defect and enhancing the production quality. The investigation shows that the surface defect of rolled steel is mainly ascribed to the inclusions containing Ti, and TiO2 and TiN is a primary source of inclusions in the steel. An effective way of reducing the inclusion performed is decreasing the Ti and N content in liquid steel. By appropriately increasing the carbon content of molten steel entering into the AOD, decreasing the carbon content of the end of blasting oxygen, slag skimming in the ladle and slagging in LF furnace, feeding SiCa wire before Ti alloying in LF furnace and optimization of Ti alloying method and protection casting with no oxidation, the yield of Ti is greatly increased, the TiO2 and TiN inclusions is controlled better, the quality of products 0Cr18Ni10Ti all are greatly improved. The number of continuous casting furnace is increased from one to the three furnace, and the production efficiency is obviouly enhanced in TISCO.
Effective Pre-Stress Identification for a Simply-Supported PRC Bridge Based on the Dynamic Response Induced by the Passing Vehicle
Authors: Bu Jian Qing , Wang Hai Yun
Published: January 2012

A new method is proposed to identify the bridge effective pre-stress from the dynamic responses induced by the vehicle moving on a simply-supported beam bridge with eccentric straight pre-stress, based on the sensitivity analysis. The bridge is modeled as Euler beam elements and the moving vehicle is modeled as a two-degree freedom system with five parameters. After calculating dynamic responses of the bridge by vehicle-bridge coupled vibration analysis, the dynamic responses sensitivity can be obtained by using the direct derivation method, and the regularization method is adopted to identify the effective pre-stress. The effects on the identified results from different responses, different measuring locations and different road surface roughness are considered in the numerical simulations. The simulation studies indicate that the proposed method can be used to identify the effective pre-stress accurately and effectively for a simply-supported PRC beam bridges.
The Fatigue Life Simulation of the Wheel of CHR3 EMU in Random Loading
Authors: Yang Jian Wei , Shi Qi Long , Zhang Guang Ye , Zhang Jiao
Published: January 2012

In order to calculate the EMU fatigue calculation of wheels, calculation of fatigue loading to obtain the wheel to solve problems, the method that makes use of multi-body dynamics simulation combined with finite element method is proposed, in time domain the wheel of CHR3 EMU in random loading is conducted the simulation study of the fatigue life. First of all, modal analysis of the wheels and wheel contact analysis are conducted in the ANSYS, and axle contact strength is also analyzed. Second, create a model of the EMU in ADAMS, and simulate to receive dynamic loading process. Finally, combined with the finite element stress method, dynamic loading time history and the linear cumulative damage rule, using ANSYS/WORKBENCH to get the fatigue life prediction chart of the wheel. It can be seen from the results, the safety factor of the most dangerous point of CRH3 EMU wheel type is 1.376, to meet fatigue life requirements, which provide a theoretical basis for the safety maintenance of the EMU.
Calculation Methods of Surrounding Rock Pressure for Small Clear Spacing Shallow Unsymmetrically Loading Tunnel
Authors: Wang Li Chuan , Peng Li Min , Zhou Dong Wei
Published: January 2012

In the process of construction, it is essential to determine the surrounding rock pressure, which needs to propose the simulation model according to relevant theory, and calculate and analyze the surrounding rock stress, to guarantee the safety of the tunnel construction and operation. However, this has been no perfect calculation theory and formula for surrounding rock stress to unsymmetrically loading tunnel (ULT). The constructed method of failure modes on the shallow ULT are proposed, together with the failure mode for the shallow unsymmetrically load single tunnel, based on the basic assumptions and basic theories of limit analysis method (LAM).
Development of Dedicated Controller for HVAC
Authors: Yang Jin Ming , Lin Yi
Published: January 2012

This article describes the development of a dedicated controller for HVAC control, and introduces the hardware interface circuits about some main chip on controller. In addition, the article also explains composition and principle about control software applied to the controller, further more points out that the fuzzy control algorithm is more reasonable than the PID algorithm for most HVAC control and dedicated control strategies play an important role for HVAC control.
Time Study of Automatic Edgebanding Machine Using BP Artificial Network
Authors: Hao Jing Xin , Liu Wen Jin
Published: January 2012

The edgebanding time is measured in one furniture factory made for wardrobe in Guangdong province, the BP network model has been built between operation time and length of gluing edge, cross edge, thickness of edgeband, then the data is calculated, trained and simulated by BP network tool box of Matlab R2009b.The result shows that BP network is a good method to build the correlation between factors and operation time, and the simulation accuracy is high by training of detailed data, MSE(Mean Squared Error) fulfills the target error of 0.001 when the net training get 1470 cycles, and the maximum error of output is less than 0.3 second, the relative error was less than 5%, the actual requirement of practice can be fulfilled.
The Robustness Analysis of Mapping Process from Functional Domain to Physical Domain in Axiomatic Design for Product Design
Authors: Cheng Xian Fu
Published: January 2012

The robust design in early design phases has crucial effect on the quality of product. It aims to design a product that satisfies customer needs while ensuring minimal effects of environmental variations. So, it is very necessary to research on the system robustness. Axiomatic design generally leads to design robustness, which can easily represent system structure, capture design requirements, and identify functional requirements. The objective of this research is to develop a robust design framework that can analyze robustness of mapping process from the functional domain to physical domain in axiomatic design. It can improve the system robustness to the variations in design parameters and design matrix characteristic uncertainty. Two separate optimization objectives are traded off in the compromise decision support problem (cDSP). The essential of this framework is to infuse the robust design concept into the conceptual design process. The proposed method is demonstrated with an example on the structure uncertainty design.
Design Research on a Kind of Derivative Welding Device of Car Door
Authors: Lv Jun Cheng , Yang Lian Bo
Published: January 2012

The paper designs a kind of derivative welding device aimed at the side door’s repair welding platform of a model which contains the type of U-groove glass rose window, studies out the design strategies and processes of the device, according to the side door’s distributed characteristics of the repair welding points, schemes out the structure scheme to meets stiffness, strength, welding quality, welding efficiency, manufacturing cost and maintenance cost, etc, by using the method of AutoCAD designing, UG modeling and static simulation at the same time, and introduces its electric layout and working principle at last.
Dynamic Simulation for Rolling Impact Compaction Machine
Authors: Gao You Shan , Song Zhi , Wang Ai Hong , Jin Ze Kun
Published: January 2012

Through established the simulation model for the engine and the traction host powertrain of rolling impact compaction machine, Simulated the working load with time history with the simulation parameters of rolling impact compaction machine. The simulation accuracy was verified by compared between the test speed and the simulation speed. The speed, turbine torque, torque converter efficiency, torque converter, gear ratios, fuel consumption, engine power, torque are dynamic changes follow with the alternating load and slope load so as to adapt to the dynamic drag torque fluctuations. Traction host power must be equipped with a full host transmission of the internal combustion engine. Driveline should be hydraulic transmission fluid or hydraulic machinery.
The Creation of the Special Characters Based on AutoCAD
Authors: Zhang Li Li , Jiang Dong Hua , Shao Dong Wei , Zhao Yue
Published: January 2012

The creation method is studied based on AutoCAD, the steps how to use the AutoCAD2010 software to create text style and several typical special characters are stated for some examples, and an effective method for inputting special characters rapidly and accurately in engineering drawing is provided.
Reliability Evaluation on Machining Center Based on Three-Parameter Weibull Distribution
Authors: Ren Gong Chang , Yang Zhi Wei , Meng Bo Min
Published: January 2012

In order to improve the model accuracy of reliability evaluation, the Three-Parameter Weibull Distribution model of time between fault was established by introducing location parameters. The correlation coefficient optimization method based on the adaptive genetic algorithm was firstly applied to estimate the location parameter of the Three-Parameter Weibull Distribution. Shape parameter and scale parameter were obtained by the least square method. The time between failures of these series machining center submitting to three-parameter weibull Distribution was checked by the test hypothesis of goodness-of-fit distribution. Finally, the machining center was carried out reliability evaluation based on the Three-Parameter Weibull Distribution model.
Study on Two Degrees of Freedom Turntable with Large Panel Array
Authors: Liu Yong Guang , Wang Zi Jing , Qin Lei
Published: January 2012

This article describes a research on two degrees of freedom turntable with large panel array, proposed an electric-driven method with self-locking function and modular structure mode. And we designed the large panel array two degrees of freedom turntable with 6m × 6m board. The pointing accuracy of the two-axis is 0.01°, azimuth and pitch angle are range to ± 20°, It’s wind resistance level is 8 and have many advantages such as long-term self-locking, safe, reliable, light weight and so on. This article focuses on the turntable’s driving principles and structures; finite element analysis shows that the structure we designed is reasonably practicable, safe and reliable.
Generating STEP-NC Files for a Circuit Board Milling System
Authors: Wang Ke , Zhang Cheng Rui , Liu Ri Liang , Zhang Xiang Zhi
Published: January 2012

Since G-codes have been proved limiting the modern manufacturing industry, ISO14649 was put forward. This paper presents a solution to generate ISO14649 files for circuit board milling. The process planning is given, and all the processes needed are contained in the ISO14649 file. Features and machining operations are identified for each process, such as the closed pocket having a “General_closed_profile” attribute and bosses, round holes, slots, the planar face, contour parallel strategy, contour bidirectional strategy and etc. The scenario of one feature with multi tools are put forward to promote the milling efficiency and an entity “Combined_Machining_workingsteps” is proposed. Besides, some other extensions are made, such as entities for representing circuit geometries in machining features. Algorithms for tool paths generation are demonstrated for contour parallel milling and bidirectional milling, where a new algorithm based on pixels is used. The new algorithm can be used in other functions such as detecting uncut regions.
Structural Optimization Research on Girder of 200t Bridge Crane Based on ANSYS
Authors: Ning Zhao Yang
Published: January 2012

According to the practical production of 200t bridge crane, the structure and operating conditions of the main girder were studied and the optimal mathematical model was established. Through determining the objective function and boundary constraint conditions, the finite element model was established based on ANSYS and the analysis results were obtained. Using the first order optimization method to optimize the calculating results and comparing with the initial sequence, it shows that the total volume of girder is decreased by about 19.4%. The structural optimization of the main girder gets a preferable economic benefit and provides a foundation for designing the bridge crane girder.
Improved on the Routing Protocol of WSN for the Coal Mine Safety
Authors: Zhang Qiu , Shen Wen Yi , Xu Wen Qiang , Xu Bao Guo
Published: January 2012

Many issues are considered such as the limited energy of the mine safety monitoring system, which bring about the accidents taking place frequently. In this paper, the wireless monitoring system and protocol is re-selected and continuously improved. A reliable and energy-efficient routing protocol——SPIN-RE (SPIN-Reliable and Energy efficient) is proposed to improve the efficiency of the node energy and prolong the lifetime of the wireless sensor network. It is based on the SPIN which is the traditional routing protocol. It adds not only the energy threshold but also the memory list in the REQ message to balance the energy consumption between the single node and the whole network in the process of the data transmission. The result of the simulation shows that this protocol has a great improving in saving energy compared with the SPIN routing protocol.
The Finite Element Analysis of Cable
Authors: Sun Xiao Yu , Wang Zhen Qing
Published: January 2012

This paper investigates the influence of metallic trays on the resistance of cables made. the paper focuses on the history of life estimation methods of P-3C aircraft, with brief descriptions of recently conducted full-scale fatigue test. A physical model of an actively controlled cable has been used to demonstrate the control effectiveness of the proposed strategy through a large campaign of experiments,conducted in various frequency ranges and amplitude levels including meaningful external resonance conditions. Analytical investigations basedon the solution of nonlinear equations of motion, derived from a modal synthesis approach with substructural formulations, show an early jump in the freauencv response curve of the main cable.
The Security and Privacy Protection in RFID
Authors: Fu Chun Chang , He Wei Lin
Published: January 2012

Radio frequency identification technology is an automatic identification technology started in the 1990s. With the RFID technology in a wide range of applications in different areas, it offers the security and privacy threats and caused a great deal of attention. At present, system security and privacy issues have become one of the main factors restricted the wide application of radio frequency identification technology. Aimed at the problem, this article discussed the safety of the privacy issues.
The Research on the Application of Two Kinds of Light Sources in the Training Venue for Physical Education of Universities
Authors: Li Shu Fang
Published: January 2012

The energy efficiency experiment of electric light is implemented according to the lighting design of the physical training venues. In the experiment, the corresponding illumination, power and energy efficiency ratio of the commonly used high pressure sodium lamp and metal halide lamp which work under the voltage ranging from 187V to 234V are experimentally measured and the lighting effect characteristics of the two kinds of electric light sources compared, proving that the high pressure sodium light source should be employed in the training venue for physical education of universities.
Standard Reflecting Plate for Measurement of Radar Absorbing Materials in 3 mm Band
Authors: Yan Hai Lun , Hong Tao , Zhao Jing Cheng
Published: January 2012

This paper introduces the manufacture of a new standard reflecting plate, which is used to calibrate the measurement system of radar absorbing materials in 3 mm band. The new standard reflecting plate is designed and employed with the structure of truncated pyramid and metal with high permittivity. It has the nominal reflectivity of-5dB, -10dB, -15dB and has the characteristics of high stability, easy manufacture and convenient usage.
The Construction Technology of Large Amount Concreting to Pouring the Over-Length and Extra-Large Diameter Piles Foundation in Deep Water
Authors: Mu Lan , Zhou Min Juan , Hu Yu Ting , Du Yu Lin
Published: January 2012

This paper is to introduce the construction technology of Subaqueous Concreting of Lingjiang Large Bridge 43# pillar to pour the over-length and extra-large diameter piles foundation in deep water by the project case in order to summarize the construction experiences and technology.
The Study and Design of the Wood Horniness Alloy Milling Cutter CAD System
Authors: Pan Qie , Jiang Dong Hua , Lin Wu Min
Published: January 2012

Milling cutter can process the plane, shaped exterior, rabbet, mortise and many kinds of technologic hubs in the processing of wood cuttings and be widely used in many milling machines, planers and planers of four sides. Horniness alloy milling cutter is diffusely employed in lot of countries for the more durable grade compare to the other alloy cutter. As the course of market globalization and economic incorporation quicken, competition in manufacturing become serious. In order to win the competition, shorten the design time and increase the design reliability, CAD technology is necessary to use in the design of complex cutting-tools. The technology logical and efficiency quality of the cutter affect straightway the precision and the cost of the manufacture. Accordingly, cutting-tool CAD/CAPP/CAM integration comes true, and benefit of cutting-tool enterprise is improved. The contents of the research include: Aiming at the present design actuality in the WHAMC in china, the general design ideas and schemes of WHAMC CAD system are put forward. The completely research has been fulfilled in the functional module of the designing, intensity proofing, configuration and outputting of the drawing of the WHAMC CAD system. The floor rabbet cutter is the example in this part. This paper has analyzed the structure characteristics of the floor rabbet cutter, established the calculation of the floor rabbet cutter, parameter database of drawing, the basement of developing the marketable WHAMC CAD and discussed the probability of comprehensive development of the marketable WHAMC CAD software. The paper is developed by using the Auto CAD as the development flat and the LISP language as the development language by comparing and analyzing and performs functions of each design module of the system. The system provides man-machine conversation on the inputting parameters.
A Prediction Model of Concrete Fatigue Residual Strength
Authors: Meng Xian Hong , Zhang Yu Xian , Zhou Jing Hai
Published: January 2012

A model of attenuation of residual strength with number of cycles has been founded .In this model the constant confined stress and maximum stress of fatigue loading are both considered. Based on the data of experiment, the coefficients of the model are determined. The model can be used to predict the residual life of specimen under biaxial compressive loading with constant confined stress.
Centralized Router Election for IP-WSN Based on Facility Location Model
Authors: Wu Zhen Hua , Huang Xiao Chuan
Published: January 2012

It is a good alternative that uses reduced IPv6 as network layer protocol of wireless sensor network (WSN). This will generate a new problem: how to choose some nodes as router for homogenous, dense deployment WSN. This paper proposed a centralized router election method, which is based on facility location model, for IP-WSN. This method creates a 0-1 integer programming model by regarding router election as uncapacitated facility location problem firstly. Then genetic algorithm is used for solving the created model. The simulation results show that this method can elect small number of nodes as router with high efficiency.
Simulation Research of Distributing Valve of Underwater Hydraulic Breaker
Authors: Chen Zhen , Sun Hong Qi , Liu Xin Zhu , Zhao Yue
Published: January 2012

Distributing valve is the key component of underwater hydraulic breaker, and the theoretical analysis of it is very necessary. Through the flow analysis of the conical valve core, the cone angle of the conical valve core has been determined, the design parameters of distributing valve have been verified. According to the force balance equation of the conical valve core and distributing valve core, the corresponding simulation research and analysis have been done for this distributing valve, the rationality of the design has been further verified. According to the knowledge of hydraulic breaker, valve mouth flow and force analysis, the various analysis and validation of distributing valve of breaker have been done, the rationality of design has been checked, and the analysis method can be adopted in studies of this area.
Critical Technique and Design Method of Test Data Acquisition System for Centrifugal Shaker
Authors: Wang Yong Zhi , Yuan Xiao Ming , Huang Hao Hua , Sun Rui
Published: January 2012

For soil is a complicated material with mechanical properties close ties with the stress condition it suffered, centrifugal shaker shows great superiority to the research of soil dynamics and geotechnical earthquake engineering. Currently only two large centrifugal shakers exist in USA and Japan respectively, while no one has been established in China, and practically the construction of centrifugal shakers is still in an exploratory stage throughout the world, remains many difficulties. Test data acquisition system as an important part of a centrifugal shaker certainly has some critical techniques and difficulties. This paper firstly analyses the special function and critical techniques of test data acquisition system for dynamic centrifugal model tests, then proposes a design method and points out its advantages, in order to give guidance for the construction of centrifugal shakers, especially large centrifugal shakers.
Autoclaved Fly Ash-Lime Brick Wall of the Proposed Shear Strength Formula
Authors: Pan Lin , Han Chun
Published: January 2012

In this paper, the author by 12 slices fly ash brick masonry wall (solid brick and cork brick) slice, 2 slices of sintering ordinary brick masonry wall under cyclic horizontal and vertical loading experiment (including different normal stress, different mortar strength, and presence of post) is given, according to three of the most popular theory. The author suggest the autoclaved fly ash brick masonry proposed formula with Changsha university of science and technology, and Chongqing university the relative test data after that compared, autoclaved fly ash brick wall shear strength calculation formula is recommended. The method of the present paper may provide an important reference to engineering design as well as code revision.
Study of the Performance of Practical Magneto-Rheological Elastomers
Authors: Feng Wei Bang , Yang Xue , Lv Zhi Qiang
Published: January 2012

Magneto-rheological elastomer( MR elastomer) is an emerging intelligent material made up of macromolecule polymer and magnetic particles. While a promising wide application it has in the fields of warships vibration controlling for its controllable mechanical, electrical and magnetic properties by external magnetic field, design and application of devices based on it are facing great limitations imposed by its poor performance in mechanical properties and magneto effect. Aiming at developing a practical MR elastomer, a new confecting method was proposed in this paper. Then, following this new method and using a specificly designed solidifying matrix, an amido- polyester MR elastomer was developed with its mechanical property systemically explored.
Research on Embedded Numerical Control System Software Based on ARM Microprocessor
Authors: Wang Yue , Zhang Jia Ying
Published: January 2012

The design thought of "dual-CPU architecture" is used on the basis of a deep study of embedded systems and multi-functional CNC machine tools. That is to say, microprocessor S3C2440A of Samsung ARM9 series is used as control core, whose PWM timer produces pulse to realize the automatic control of the process. As the main control center, it plays the main functions of NC program input, keyboard entry, LCD display, the interpretation of the program, crude interpolation and so on. Using CPU as auxiliary equipment, it receives signals from master control center to realize fine interpolation through further calculation. Simultaneously the periphery of the system expands modules of human-computer interaction, communication, servo, and input/output to realize human-machine interaction, data communication and motor control. Finally, the hardware modules are debugged and the results are analyzed, which shows that the system is of fast response, reliability, low cost and good cutting and portability. This system has achieved the desired anticipation and has broad prospect in the economical CNC field which requires fast moving and proper processing speed.
The Application of Anchor in the Urban Underground Engineering
Authors: Luo Cong Shuang
Published: January 2012

Anchor as a simple effective shoring form of the city is widely used in the construction of underground projects, and popularized by the underground engineering strongly. From the type, monitoring instrumentality, and method of the anchor,This paper would analyse the application of the anchor and the problems existed in the underground engineering to afford some help for the underground engineering, at the same time, it have important reference value for researching new type, construction method and the anchor monitoring method in the process of underground engineering.
The Discuss about the New Approach of the Structural Layout of Belt Type Sintering Machine
Authors: Wang Xue Jiao , Bai Ming Hua , Ren Su Bo , Chen Jian Wei
Published: January 2012

Existing sintering machine for controlling of arch camber is not ideal. The usual way is by means of the hydraulic system to balance the excess thrust what is caused arching. For this reason, the paper considers to change the structure layout of belt sintering machine ,so that eliminate the arch camber by itself. So improvement of process layout of 60㎡ sintering machine has been made, and thus deduced the expression and got the limen formula of the thrust force which the back sprocket wheel drive lower pallet cars. At the same time, through the analysis and compute got driving moment of lower pallet cars, which caused by four pallet cars from back sprocket wheel. According to equation of mechanical equilibrium to eliminate the arch of pallet cars, determine the suitable angle after sintering machine has been improved to solve the problem about arch pallet cars completely.
Structure Optimization for Backrest Frame of CRH Seat Based on DOE Analysis
Authors: Zhao Li Hui , Tao Ying Long
Published: January 2012

The stiffness of the seat from CRH high speed train was studied. First, FEM analysis was performed on the entire seat and the backrest frame. Results showed that the backrest frame accounts for most of the seat’s deformation. Then a three factors and three levels orthogonal experiment was designed to find which component affects the stiffness of backrest. From the results of nine experiments, conclusion that side beams have the high sensitivity on seat stiffness. Finally, size optimization was carried on to find best cross section of the side beam. The FEM analysis of new design showed that the maximum deformation of the seat was 9.27mm, decreased by 24.1% compared with original design
Preparation of Reduced Graphene Oxide/Chitosan Composite Films with Reinforced Mechanical Strength
Authors: He Yong Qiang , Zhang Na Na , Wang Wen Chao , He Si Yao , Gong Qiao Juan , Qiu Hai Xia , Wang Wei
Published: January 2012

Reduced graphene oxide (rGO)/chitosan composite films were fabricated by a solvent casting method and cross-linked using genipin. Their properties were characterized by scanning electron microscopy, X-ray powder diffraction, Raman spectroscopy, and UV-Vis spectroscopy. When rGO was added the tensile strength and membrane rigidity of the films increased, but their swelling ability in water decreased.
Effect of Strain Rate on the Microstructures and Properties of Hot–Rolled TWIP Steel in the Solution Condition
Authors: Yang Yang , Li Chun Fu , Song Kai Hong
Published: January 2012

TWIP steel containing 0.21% C, 24.4% Mn, 0.9% Si, 1.84% Al, 4.61% Cr, 1.89% Ni, 0.41% Mo and 0.012% Nb was investigated. Tensile tests of this steel were performed in the strain rate range of 10−4–10−3 s−1. Results indicate that tensile properties of TWIP steel at room temperature are sensitive to strain rate in the studied range. Analyses on the relationship between strain–hardening exponent and strain rates show that the formation of twins during deformation greatly affects the strain–hardening behavior of TWIP steels.
First-Principles Study of the Self-Assembly Monolayer on Silicon (100) Surface
Authors: Shi Li Qiu , Yu Feng , Hu Xiao Ping , Li Xiao Wen , Sun Tao , Dong Shen
Published: January 2012

The first principles calculation based density functional theory has been employed to investigate the changes of energy, bonds length and bonds angle of aryldiazonium salt Self-assembly monolayer (SAMs) on silicon (100) surface. The steady structure and binding energy can be determined. It is shown that the partial bonds length and bonds angle have been changed obviously before and after self-assembly. The reduced energy of system is-101.95eV, i.e. binding energy, which is emitted energy of Si-C covalent bond coming into being, illuminates that the SAMs can be fabricated easily between aryldiazonium salt and Si (100) surface. The stability of system can be improved and SAMs can firmly stay on Si (100) surface.
The Study on Carbon Fiber Reinforced Concrete Beams Based on Finite Element Analysis
Authors: Wang Jian Hua
Published: January 2012

Carbon fiber-reinforced polymer (CFRP) sheets have recently become popular for use as repair or rehabilitation material for deteriorated carbon fiber reinforced concrete structures. Carbon fiber reinforced concrete beams were analyzed by finite element software ANASYS. Through the finite element analysis, the results showed that using bonded CFRP to strengthen R. C. beams can significantly increase their load carrying capacity. However, the beams with prestressed CFRP can withstand larger ultimate loads than beams with bonded CFRP. Using bonded CFRP to strengthen R. C. beams can obviously reduce the ultimate deflection.
Study on Mathematical Model of Homogenization of Dendritic Segregation
Authors: Liu Xin Gang , Liu Bo , Guo Huan , Jin Miao , Guo Bao Feng
Published: January 2012

The cosine solution of the Fick-2 Law, which was considered as the mathematical model of homogenization of dendritic segregation, has always been used to analyze high temperature diffusion. Cosine solution can not exactly describe the actual distribution of alloying elements in dendrite, as the slope of cosine curve is quite gentle. Based on segregation ratio SR, a new mathematical model was established by using Gauss solution of the Fick-2 Law. The new model could describe the evolution of homogenization of alloying elements during the process of high temperature, which was proved by some specific examples.
Influence of SiC Whisker on Formation and Oxidation Resistance of Coating for C/C Composite
Authors: Chen Yang , Wang Cheng Guo , Zhao Wei
Published: January 2012

To protect carbon/carbon (C/C) composite against oxidation, a SiC/Si/MoSi2anti-oxidation coating was preparated on C/C composite by embedding with the powder mixture of Si, C and MoSi2at 1600°C in argon atmosphere. In order to investigate the effection of SiC whisker on formation and oxidation resistance of coating, SiC whisker was introduced to coatings by pyrolysis of hydrogen silicone oil (H-PSO) at 1600°C before embedding treatment. Oxidation experiment was carried out in the static air at 1400°C for 2h, and thermal cycling between 1400°C and room temperature for 5 times. Morphology and phase structure of the coating were analyzed by XRD and SEM with EDS. The anti-oxidative mechanism of coating was investigated by comparing the diversity of morphology and phase structure before and after oxidation. The research indicates that the introduction of SiC whiskers improves the performance of the coating effectively. It can effectively decrease the cracking of the coating in the oxidation process, and avoid the excessive penetration of silicon to protect the matrix from being excessively corrosion.
Study on Finite Element Model of Pneumatic Artificial Muscle
Authors: Zang Ke Jiang , Ma Yan , Sun Ning , Niu Zheng Ke , Gui Xing Chun , Hu Xiao Ping
Published: January 2012

Based on the study of the mechanics features of pneumatic artificial muscle including the nonlinearities in material, geometry, and with the method of nonlinear finite element analysis, the three-dimensional finite element model of a pneumatic artificial muscle was established. The analytical results were confirmed by the experiment with the use of a pneumatic artificial muscle test bench.
Analysis of Influencing Factors of Ultrasonic Nondestructive Testing with Carbon Fiber Reinforced Plastics
Authors: Xue Di , Zhang Jin Bo , Li Cai Hua
Published: January 2012

In order to research the influenced factors of sensitivity of ultrasonic nondestructive testing, the compared experiments using water immersion and contact method were carried out and the experimental results of sensitivities were obtained. The results showed that the limited sensitivities of probes with 1MHz and 2.25 MHz is very low. And the defects ofφ1mm, which distance not exceeding 1mm, can be detected by probes of 5 MHz and 10 MHz. The defects ofφ0.5mm can be detected by probes of 15 MHz and 20 MHz. The definition of defects apperance will be further improved for the probes with their frequency more than 15 MHz when the scanning step enough small. The distance of probes and defects has little effect on the detecting sensitivity.