bluuebunny/crossref_metadata_2025 huggingface dataset:
Mixing Behavior and Flowing Property in Micro-Powder Injection Molding of Carbonyl Steel Feedstock
Authors: Yang Gui Rong , Li Jing , Song Wen Ming , Meng Jun Hu , Ma Ying
Published: August 2013

A feedstock consisting of carbonyl steel powder and multi-component binder was developed for powder injection molding (PIM), and the mixing behavior of feedstock was investigated under different powder loading, different temperature and different binder systems. The thermal and rheological properties were investigated. The results showed that the torque of feedstock could reach a steady state in s short time of 90 min when the loading powder was 52%. The torque of feedstock at 160°C was lower than that at 150 °C before the heating time was less 90 min. The torque of feedstock could reach steady state level in a short time of 90 min when the content of SA was 10%. SA served as surface-active agent that reduced the mixture viscosity and increased the solids content of the mixture by creating an interfacial bridge between the powder and the binder. The viscosity of feedstock decreased with increasing shear rate and temperature because the agglomerations between particles were eliminated owing to the movement.
Study on Designing and NC Machining of Fan Blades Based on Pro/E
Authors: Xu Ze Ning , Wang Yong , Liang Rong De
Published: August 2013

The process of surface design and programming method of NC machining with Pro/E is introduced. By designing and NC machining of fan blades, the method of designing and automatic programming of free form surface by using of parameters materialized is described. And its cutting path is planed reasonably. At last, the NC program is derived.
Experimental Study on Tire Non-Steady State Slip Properties
Authors: Liu Jie , Jia Xiao Ling
Published: August 2013

As for the two typical inputs of pure side slip angle and pure yaw angle, this paper presents the in-depth analysis of lateral force, aligning torque and relaxation length respectively within the domains of distance and spacial frequency, and also explains the test results by theoretical model. Within the small side slip angle, tire is a first-order linear system. Relaxation length is equivalent to the time constant of linear system, which decreases as slip angle increases. It indicates the dynamic performance of tire system.
Design and Aerodynamic Characteristics Analysis of a Section Morphing Wing Based on Smart Materials
Authors: Yu Yue Min
Published: August 2013

This paper discusses the design of a section morphing wing that permits a change in the wing section while simultaneously supporting structural wing loads. Section morphing wing allows for two discreet airfoil of the wing. The airfoil 1 is original airfoil maintained by NACA 4412 rib sections. The section morphing wing uses shape memory alloy spring actuator to drive wing section deformation. Skins of the section morphing wing uses shape memory polymer. Computational aerodynamics are used to estimate the performance and dynamic characteristics of each wing section of this section morphing wing as its wing section is changed. Results show that when angle of attach (AOA) is 0 deg, the lift-drag ratio decrease as the airfoil thickness decreases when mach number is less than 0.9 and the lift-drag ratio increase as the airfoil thickness decreases when mach number is greater than 0.9. When AOA is 5deg, the lift-drag ratio increase as the airfoil thickness decreases . The lift-drag ratio decrease as the airfoil thickness decreases when mach number is less than 0.7. When AOA is 10deg, the lift-drag ratio increase as the airfoil thickness decreases when mach number is greater than 0.7. We can chose airfoil 1 or airfoil 2 according to variation flight conditions.
Analysis of Shaft Mechanical Runout Forming Mechanism and Diagnostic Technique
Authors: Yu Juan , Wang Xiu Feng
Published: August 2013

Harmonic components in holospectrum are mainly due to the lateral vibration, and they are important parameters in fault diagnosis of rotating machinery. However, defects on measuring shaft surface are also included in harmonic components in holospectrum and may lead to misdiagnosis. It’s necessary to study a method to identify the shaft surface defects. Based on the manufacturing process of outer round, this paper studies the forming mechanism of harmonic defects on outer round and their characteristics in holospectrum. An experimental example is also given to validate the theoretical analysis, and the results show that holospectrum can recognize the harmonic defects on outer round well.
Effects of Process Parameters on Wall Distribution Homogeneity during Hot Power Backward Spinning for 7075 Cast Aluminium Alloy Tube
Authors: Zhao Gang Yao , Tu San Jun , Zhang Ran Yang , Wang En Le , Fang Ping
Published: August 2013

To obtain the effects of parameters on wall distribution homogeneity of 7075 cast aluminium alloy tube in hot power backward spinning accurately, a new method to accurately describe the wall-nonuniformity of the tube has been proposed. Combined with FE analysis, the change regularities of the wall-nonuniformity with the process parameters varying were obtained. The results show that wall-nonuniformity first increases slightly, and then decreases with the increase of preheating temperature. With roller feed rate increasing, wall-nonuniformity increases firstly, and then decreases. Furthermore, the wall-nonuniformity reaches a minimum value when the roller feed rate is 0.6mm/r. The wall-nonuniformity increases firstly, and then decreases with the increase of roller fillets radius, but the trend becomes weaker.
Studying System Analysis for Knowledge Reasoning Component-Based
Authors: Zhang Yue Hong , Yang Zhong Shan , Hao Li
Published: August 2013

This design process of Environmental Knowledge should include a system analysis phase that somewhat differs from the traditional one. Also, the identification of these requirements for adjustment requires a good knowledge of the Knowledge in which the system will be executed. At one side, we argue that what is missing now is a structured and robust design process for SA. However, the design time decisions need to be done in the situation of incomplete and uncertain knowledge about environmental Knowledge. This way, we need to understand to what extent the requirements are being satisfied and this can support adjustment strategies at run-time. Therefore, at the other side, we argue that requirements for adaptive systems should be supported not only at design-time but also at run-time. The ability of an adaptive system to be a requirement-aware system inspired by [, in which the authors argue that requirements for self-regulation systems should be run-time entities that could be reasoned over at run-time.
Experimental Study of Yuzhou Danhou Long Flame Coal on Vibrating Mixed Flowing Drying System
Authors: Zhong Xiao Hui , Jin Zhen Huan , Zhao Bin
Published: August 2013

According to the characteristic of Yuzhou Danhou Mine long flame coal, the drying process of the coal was studied on mixed flowing vibrating drying system. The parameter was tested, according to the drying effect, the drying process was optimized. The experimental result shows that mixed flowing vibrating drying system can reduce the moisture and improve the net calorific power of coal effectively, by which transportation cost was saved and the value of coal was increased.
Design of LED Display System for Robot Expression
Authors: Lu Xiao , He Ying , Wang Hai Xia
Published: August 2013

The real reproduction of the robot expression affects not only how well the robot can mimic mankind, but also whether the robot can be accepted or not. In this case, it is necessary to find a display mode that can mimic mankind. An improved new method, namely advanced led display mode is proposed in this paper. The realization process of the led display system is as follows: A robot expression to be displayed is first chosen, then the expression data is sent to microcontroller through the serial port communication technology, and finally the display of the corresponding expression on the led screen is controlled by the microcontroller by serial port interrupt mode. The design of the led display system is proposed for robot expression, including the selection of communication mode, control mode, scanning mode, and expression display.
Electrochemical Property of Single well Carbon Nanotubes/Chitosan Nanocomposite in Electrochemical Sensor
Authors: Zhang Wei , Xu Hong Bin , Li Jia Xun , Zhao Dan , Lin Xiao Juan , Li Ya Hui , Ding Shi Jia
Published: August 2013

Single wall carbon nanotubes (SWNTs)/chitosan (CS) composite was synthesized by electrostatic interactions between positively charged CS and negatively charged carboxylic group-functionalized SWNTs. The SWNTs/CS composite was characterized by using scanning electron microscopic and electrochemical analysis. The experimental results show that the SWNTs/CS composite is stable and homogeneous and has excellent electrochemical property.
The Calibration Method of a Large Six-Axis Force Sensors
Authors: Yang Min
Published: August 2013

Based on the accelerator calibration method of six-axis force sensors, the system of static calibration for a large six-axis force sensor is build, The accelerator calibration method are introduced detail. the designed six-axis force sensor in multi-dimensional accelerators field is calibrated and the result is well used. the system of static calibrations a contraption, which is smart cheap and practicality.
Multifunctional Sensors for Monitoring Corrosion of Mortar Specimens
Authors: Jin Chung Kuk , Jeong Jin A
Published: August 2013

This study examines the use of multifunctional sensors for corrosion monitoring in various conditions. Experimental tests were carried out on mortar specimens to verify the applicability of a multifunctional sensor. Single-functional sensors measuring the potential and current were also used for comparison. The factors measured were the corrosion potential, galvanic cell current, resistivity, and corrosion rate. The results show that at least under the present testing conditions, the multifunctional sensor is quite useful for detecting the corrosion severity.
An Automatic Anemometer Based on the Technology of Double-Ring Thermoelectric Sensing Structure
Authors: Chang Hsing Cheng , Hung San Shan , Lin Shyan Lung , Chang I Nan , Lai Chi Chih
Published: August 2013

The research presents a novel automatic anemometer based on the technology of automatic multi-dimensional thermoelectric sensor array. The multi-dimensional thermoelectric sensor array was designed to form a double-ring structure using commercial thermocouples to detect real-time airflow temperature distribution, velocity and direction. The sensing arrays and a controllable heater and a human-machine interface that is calibrated by a hot-wire anemometer. The anemometer has advantages of low cost, real-time detection with fast response. Related air flow information has measured accurately and repeatability.
Research on Ultrasonic Height Sensor for Electronically Controlled Air Suspension
Authors: Wang Jian Hua , Wang Yun Cheng , Xie Fei , Han Xing
Published: August 2013

The height sensor based on ultrasonic uses the ultrasonic characteristics to make real-time analysis of the echo signal to get the change of distance. By improving the precision of ultrasonic height sensor, it can be used in the air suspension to calculate the deformation of suspension more accurately, which can help to improve vehicle running smoothness and handling stability.
Double Interpolation Method in Time-Interval Measurement
Authors: Zhan Hui Qin , Li Shuo , Gu Jun
Published: August 2013

Analog interpolation is the key technology of high-resolution short time-interval measurement. This study proposes a double interpolation method in time-interval measurement. The technique greatly improves the resolution of the analog time expander, which is based on the principle of charging and discharging of the capacitor. This method can significantly reduce the interpolation time, effectively solve the conflict between high measurement resolution and fast measurement rate. The principle of the time measurement expander based on double interpolation method is described in this paper and compared with the expander based on single interpolation method. Its measurement error is also analyzed in this study.
Construction of 3D Substation Monitoring System Based on Unity3D
Authors: Yang Pei , Zhu Li Peng
Published: August 2013

With the development of the 3D technology, the construction of a 3D substation monitoring system becomes feasible. The Unity3D is a professional and comprehensive engine for providing advantages in fast deployment, architectural visualization, and 3D animation. It can support multiple platforms and make the development much easy with an expansive architecture involved. In the normal use, we build 3D model with tools such as the 3DMax, and import the models to Unity3D. By the means, we can finish making scenes and cartoons as well as integrating business data. We can also design multive functions such as the roaming in first person view, camera switching, real-time monitoring data displaying, real-time alarming, and so on. We write custom Shader to achieve some special effects. For example, we can write vertex and fragment shader to receive the data from the scripts and parse the data to get the information of temperature points. The distance between each UV point and the given temperature points is also computed and mapped to the values of temperature and color.
Equipment State New Indicators and Forecasting ARMA Mode
Authors: Wang Zhu Lin , Zhu Yan Bo , Li Qi Chang
Published: August 2013

The equipment storage condition monitoring technology research equipment equipment full life cycle environmental temperature and humidity, vibration impact stress and location information such as the attitude of the real-time data acquisition and processing analysis of equipment equipment maintenance and management is the effective supplement. Based on the equipment storage state information definition warning rate new indicators, and establish the ARMA forecasting model. performance is not the same as the state of the difference between the equipment equipment change maintenance and quality management plan.
Spur Bevel Gearbox Fault Diagnosis Based on Wavelet Packet Transform for Feature Extraction and Flow Graph Data Mining
Authors: Huang Wen Tao , Niu Pei Lu , Liu Yin Feng , Wang Wei Jie
Published: August 2013

Gearbox vibration signal contains a wealth of the gear status information, used wavelet packet transform (WPT) refinement of the partial lock ability to extract the fault signs attribute information in the vibration signal. Extracted signs attribute information as the input of the flow graph (FG), generated decision rules to achieve the purpose of fault diagnosis. FG was a knowledge representation and data mining method to mine the intrinsic link between the data and improve the clarity of the potential knowledge. The results confirmed that used of WPT feature extraction and FG data mining method can accurate detection the gear fault.
Design of Electrical Capacitance Tomography Hardware System
Authors: Cao Hai Yan , Duan Xue Mei , Wang Hua Xiang
Published: August 2013

To simplify the excitation generation and data acquisition of the electrical capacitance tomography (ECT) system, a simple hardware design for ECT system was developed. The theory and hardware architecture of the ECT system were introduced. Under the control of DSP, the excitation and measure of entire system were controlled, the conversion of voltage signal from capacitance/ voltage (C/V) to analog/digital (A/D) was controlled. After demodulation and filter, the reconstruction images were achieved through communication circuit to computer by DSP. The experiments show that the real-time of system and the quality of reconstruction image are satisfactory, can meet the requirements of practical application.
Interleaved Parallel for DC-DC Converters Operating in CCM
Authors: Li Jun , Zhang Jun Hong , Gao Wei
Published: August 2013

In the power conversion, power supply in parallel to increase capacity and reliability is a commonly used method; and the current ripple have a great impact on the size and weight of the power supply. DC-DC parallel power supply ripple in the buck circuit model based on analysis, Fourier series expansion of the current continuous state of a single DC power inductor current, commence on the series and parallel power simulation study. Analysis and simulation results show that interleaved parallel can effectively inhibit the output current ripple.
A New Method for Electronic Circuit Fault Knowledge Acquisition Using PSPICE
Authors: Ding Guo Bao , Huo Zhi Cheng , Wang Lian Bing , Li Dan
Published: August 2013

A new method for electronic circuit fault knowledge automatic generation Using PSpice has been put forward based on summarizing development of the intelligent fault diagnosis technology. A new algorithm of generating fault knowledge automatically has been designed by analysing the structure characteristics of the CIR file. The algorithm of search automatically has been designed by analysing the structure characteristic of the OUT file. The DC fault dictionary method has been improved and the fault order according to the minimum distance will guide the user to remove the fault. In the end, through these technologies, the fault knowledge query system has been empoldered. The feasibility of the proposed method has been proved by experiment results.
Optimization of the Au Stud Bump Number for the Flip-Chip Packaged InGaN LEDs
Authors: Zhang Yun Yun , Sun Xiao Wei , Kuo Wen Yu , Chang Liann Be , Huang Bohr Ran , Zhao Jun Liang , Dai Hai Tao , Wang Shu Guo
Published: August 2013

Au stud bump can provide a good heat spreading path for the flip-chip LED due to its high thermal conductivity (300 W/mK) . In this paper, we compared four flip-chip LED devices with four different numbers of Au stud bumps. The thermal imaging analysis indicates that the heat dissipation is proportional to the number of Au stud bump. However, when the number of Au stud bumps was larger than 24, the heat dissipation performance will become deteriorated due to the poor bonding between grain and substrate. Therefore, the number of Au stud bumps was optimized to be 20 to 24, which can be employed to develop flip-chip LEDs with optimum electrical and optical performance.
Research of Collection and Conversion Device of Screw Pump Motor Heat Energy Based on LTC3108
Authors: Qi Feng He , Wang Yan Qin , Xiong Chun Yu , Cui Feng
Published: August 2013

Designed thermal collector conversion device based on the principle of thermoelectric power generation. This device used the LTC3108 module which was low input voltage boost converter. The device can convert the heat from the screw pump working into electricity. The electricity can be powered microprocessors and sensors.
Applying of FFT Algorithmic in Power Substation Microcomputer Monitoring System Based on DSP2407
Authors: Wang Ping , Li Dui Yuan , Zhu Da Rong , Zhu Guang
Published: August 2013

In the detection substation microcomputer AC sampling system , monitor the three-phase voltagethree-phase current , power factor ,power online in real-time. This paper describes a FFT designing idea of the synchronous sampling in AC sampling from the substation monitoring system parameters .It provided sampling and calculation methods to apply DSP, MCU measurement of AC signal , details of the mathematical model of AC electrical parameters digital sampling, the introduction of schematic diagram of hardware processing sampling signal of FFT, comparison of the realization of the software and MATLAB simulation, thus obtained the correctness of this algorithm.
Smith Prediction Monitor AGC System Based on CPSO Self-Tuning Pi Control
Authors: Ji Ya Feng , Zhang Dian Hua , Sun Jie , Li Xu
Published: August 2013

In accordance with the feature of pure delay in monitor AGC system for hot rolling mill, a new self-tuning PI Smith prediction controller based on chaotic particle swarm optimization (CPSO) is developed. The algorithmic principle and design method of new controller are given. Based on the typical monitor AGC model of tandem hot mill, the analysis of dynamic performance for traditional PI Smith prediction controller and CPSO self-tuning PI Smith prediction controller is done by MATLAB. The simulation results indicate that CPSO self-tuning PI Smith prediction controller has faster response and higher static accuracy than traditional PI Smith prediction controller.
Influence of Thermal Wires Spacing on Fluidic Gyroscope
Authors: Chen Jing Bo , Piao Lin Hua , Yang Pan Pan
Published: August 2013

In this paper, research the influence on spacing thermal wires in the sensitive element of fluidic gyroscope. Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of fluidic gyroscope, meshing, loads applying and equation solving. The two-dimensional airflow distributions of different distances between two thermal wires in sensitive element of fluidic gyroscope are calculated. The results show that, when the angular velocity ωi<20o/s, and the distance between two thermal wires d=4mm, the structure can reduce the velocity of vortex in sensitive element, and increase the thermal wires variation, thus it will increase bridge output voltage, and improve the sensitivity of fluidic gyroscope.
Hydraulic System Simulation Research of Demolishing Robots Based on Matlab
Authors: Yan Jing
Published: August 2013

Modular modeling methods based on the reasonable simplifying and supposing of hydraulic system of demolishing robots are proposed in this paper, dynamic mathematical model of each hydraulic element of demolishing robots is set up by the dynamic system analysis software package Simulink of Matlab, response characteristic curve is obtained by the simulation, and analysis of the simulation results is operated in this paper. The experimental results explicate that the hydraulic system is stably, real-time, low-cost, and easy to expand; it can meet the applying requirements of demolishing robots, and it provides the theory basis for the project applying of the hydraulic system of demolishing robots.
Study on Application of Steam Ejector Heat Pump in Partial Innovation of Power Plant Thermal Regenerative System
Authors: Yu Xin Wei , Chen Hai Ping , Lu Guang Wu , Gao Pei , Yu Yang
Published: August 2013

The exhaust steam heat of steam driven feed pump small steam turbine is considerable in modern coal-fired power generating unit, most of which is adopted the way of wet cooling through the condenser as same as main steam turbine for condensing steam turbine unit, all the waste heat with it is taken away by circulating cooling water and not used effectively. This paper will propose the way of part of exhausted steam of small steam turbine recycled to the regenerative extraction steam system to heat condensate based on steam ejector heat pump, so as to use the exhausted steam effectively and analyze the thermal economic index of different schemes by using equivalent enthalpy drop method. The results show that it produces best economic benefits when exit steam of steam ejector heat pump is recycled to steam extraction of the fourth section.
Performance Analysis of Refrigerants R134a and R1234yf Two Stage Compression Cycle with Two Condensers
Authors: Wang Hong Li , Tang Qi Long , Jia Ning , Zhang Qing Hua
Published: August 2013

With increasing of compressor high pressure, the cycle performance of R134a or the cycle of R1234yf has a downward trend. With increasing of the evaporating temperature, the cycle performance of R134a or the cycle of R1234yf has an increasing trend. With increasing of outlet temperature of condenser, the performance of R134a or the cycle of R1234yf has a downward trend. With increasing of intermediate pressure or discharge temperature, the performances of all cycles are decreased. Under same contrast conditions, the cycle performance of R134a is better than the cycle of R1234yf.
Performance Analysis of Refrigerants R134a Two Stage Compression Cycle with Two Gas Cooler
Authors: Xue Gui Jun , Liang Da Wei , Liu Guang Da , Li Shui Qing , Zhou Zhen Jiang
Published: August 2013

With increasing of high pressure, the two stage compression cycle with two gas cooler has a downward trend. With increasing of the evaporating temperature, the two stage compression cycle with two gas cooler has an increasing trend. With increasing of outlet temperature of condenser; the two stage compression cycle with two gas cooler has a downward trend. With increasing of intermediate pressure, the performances of the two stage compression cycle with two gas cooler are decreased.
Photograph Method Used in Computerized Log Centering
Authors: Wang Yi Ren , Zhang Hong Mei , Liu Yu
Published: August 2013

Photograph method is a new scanning technique that provides cost-efficient and accurate computer system for log centering. A monochrome video camera is used to document images of a log in a perimeters rotation time. 3D digital contour of the log is constructed with the images. The biggest internal cylinder is calculated in software modules. Experiments in present study proved that photograph method was quite feasible in optimizing log centering with higher accuracy. The cost-efficient near-infrared images used in the devices were able to avoid the impact of changing illumination. This centering system can be utilized in small and medium enterprises.
Density Measurement of Coal Slime Powder by Pycnometric Method
Authors: Li Na , Hao Xue Di , Xia Zheng Meng , Lv Fu Yan , Wu Miao
Published: August 2013

Coal slime is solid waste with high solid content, viscosity, fine particles, which is generated in the production process of the coal industry. The density of its powder is an important factor to affect the resistance characteristics of pipeline transportation. Tests show that when the density changes 0.1g/cm3,the corresponding relative error of pipeline transportation resistance is up to 42%.Therefore, accurate density measurement of coal slime powder is the premise to calculate resistance loss, and has significance to study resistance characteristics of pipeline transportation and guide production practices. Based on pycnometric method, this paper improved the measurement, and adopted self-designed exhaust system, which is simple and easy to operate, and can effectively excludes the air in the pycnometer, thus improving measurement accuracy. Practices show that it is an effective method to measure powder density, with easy operation and high accuracy as well as good repeatability.
Motion Blurred Image Restoration Algorithm Based on AGA and Wiener Filter in Ship Imaging System
Authors: Liu Sheng , Wang Meng Jun , Fu Hui Xuan
Published: August 2013

Ship internal equipment vibration will cause the imaging system platform vibration, resulting in blurred images. Wiener Filter is often used to restore the motion blurred image. The principle of the method expects to minimize the mean square error between the restore image and original image. However, this method has some constrains, and it generates ringing effect easily. In order to get high quality restore image, eliminate the ringing effect, a new approach based on an adaptive genetic algorithm (AGA) Wiener Filter was proposed, which automatically adjusts the SNR parameter value for Wiener Filter, this method selects crossover probability and mutation probability according to the fitness values of the object function, therefore reduces the convergence time and improves the precision of simple genetic algorithm (SGA), insuring the accuracy of parameter selection, effectively reducing the ringing effect after image restoration, improve image quality of restoration.
Saliency Detection Algorithm Based on Watershed Method and Regional Spatial Attention Model
Authors: Meng Lu
Published: August 2013

This paper presents a novel saliency detection method for color image based on watershed method and regional spatial attention model. Watershed method is improved to divide the original image into several sub-regions. And regional spatial attention model is specifically designed in the terms of visual attention mechanism from human's psychology and physiology. Experiment results show that our method can accurately and quickly detect the salient regions from color images, and compared with traditional ones, our method performs better.
The Technology Analysis of Geographic Information System on Geotechnique Survey
Authors: Guo Jun , Gan De Qing , Tan Jing , Jia Jing Li
Published: August 2013

According to the unceasing development of geotechnical survey technology and the demand of land resources survey management, Geographic Information System technology is proposed to establish spatial database to provide survey information for land resources surveyors and designers. At the same time, on the basis of geotechnique survey current status and integrated system, discuss the application analysis of Geographic Information System on geotechnique survey.
A Study of a Strategy for Threading Titanium Alloy
Authors: Liao Yunn Shiuan , Chen Chin Nan
Published: August 2013

The cutting of precision threads is an important manufacturing process. Several passes are needed to complete the cutting of a thread and the choice of appropriate cutting speed and depth of cut for each cutting pass is essential. The cutting efficiency and tool life are significantly affected by these two parameters, especially when cutting threads in difficult-to-cut materials, such as titanium alloy. This paper proposes the concept of an equal undeformed chip area for all cutting passes, in order to determine the depth of cut for each pass. The principal goal is to maintain the same cutting force throughout the cutting process. Using tool geometry, the relationship between the cumulative depth of cut and the undeformed chip area for each cutting pass are derived. The depth of cut of each corresponding cutting pass can be determined, once the dimensions of the thread and the number of cutting passes are specified. Experiments were conducted to cut an ISO metric screw thread, with a pitch of 0.5 mm, on a 40 mm in diameter bar. It was found that, for the same total number of cutting passes, the tool wear was less than that suggested by the tool makers, when a depth of cut for each pass was determined using the proposed method. The thread could be cut using a higher cutting speed, resulting in a much shorter machining time. In addition, the proposed strategy also allowed completion of cutting using less cutting passes. A 25% increase in efficiency was noted for the specific thread used in the experiment.
Study on the Weldability of X100 Pipeline Steel on Scene
Authors: Wang Pin Yi , Mou Zong Yuan
Published: August 2013

With the long-distance oil and gas pipelines are to development of the direction of large-diameter, high-pressure, high grade pipeline steel applications gradually become the trend of the development of the oil and gas pipeline construction. The welding process of the X100 line pipe which is about to industrial application is not yet to be determined. It is not clear that the affect to the weldability from the metallurgical composition, organization, performance, and other factors which would affect the site construction welding process and welding measures. In addition, it is not yet the discussion and analysis of the key technologies X100 line pipe-site welding process and defect types. In this paper, the X100 pipeline on-site application of welding technology research commenced work and studied the weldability and welding process of X100 which solve the field application of X100 pipeline steel pipe welding issues.
Analysis of Basic Properties and Comprehensive Utilization of the Hot Braised Slag
Authors: Zhao Fu Cai , Ju Jian Tao , Liao Jie Long , Kong Wei Ming , Dang Yao Jun
Published: August 2013

In order to utilize the converter slag that treated by the method of hot braised comprehensively. Using Jiugang hot braised slag as raw material, to determine the chemical composition of the slag with the semi-quantitative analysis and a number of chemical analytical methods. Using X-ray diffraction, optical microscopy, scanning electron microscopy and energy dispersive spectrometer to analysis the hot braised slag phase and iron phase. Also doing the measurement and analysis to the particle size of the slag, compressive strength and the grinding fineness. It was obtained the conclusion by the comprehensive analysis of hot braised slag that the hot braised slag can be returned to sintering process as solvent and it can also used in the construction、buliding materials and road engineering industry. It is a good suggestion that grounding the slag into a fine powder due to the poor effect of abrasion.
Key Reinforcement Technology of the Replacement of High-Rise Building Shear Wall Concrete
Authors: Mo You , Jiang Zhi Jun , Guo Zi Hong , Liu Yue Yong , Ming Hai Bo , Zhou Chang Quan
Published: August 2013

A high-rise residential building is the frame-supported shear wall structure. Testing found that concrete strength 6 pieces of shear wall of the tenth floor can not meet the original design requirements of C50 when the nineteenth floor was constructing. A way of replacing concealed column and corner column only by comparison an analysis.The safety of the structure was ensured and good strengthening effect was achieved by reasonable design of temporary support and construction, concrete selection and the whole deformation monitoring.
Perpetual Asphalt Pavement Response Analysis on under Heavy Loads in Northeast Area of China
Authors: Hu Ming Wu , Wang Yi Na , Su Hai Tao
Published: August 2013

Severe rutting, cracks and moisture damage are presented on conventional semi-rigid base asphalt pavements not long after completed in China. This phenomenon indicates that conventional philosophy on pavement design could not meet more and more frequent and heavy vehicle. With high structural capacity for high traffic volume and heavy loads, the Perpetual Asphalt Pavements (PAPs) solve those problems well. Meanwhile they need minimal or no major structural rehabilitation and/or reconstruction exercises in their life, which ensures low user-delay.Three PAPs, including semi-rigid base asphalt pavement, flexible base asphalt pavement, and combined base asphalt pavement, are put forward for the northeast area in China considering its climate, traffic characteristic. Finite element method is utilized to analyze response of PAPs under heavy loads. Two key factors, i.e. tensile horizontal strains at the bottom of asphalt layers and compressive vertical strains are investigated. Also the capacities of the structures on bearing overloading are estimated. Four types of wheel and axle, including single axle and single tire, single axle and dual tires, dual axles and dual tires, and tri axles and dual tires are adopted in finite element models. The shapes of tire-pavement contact area are either circular or rectangular to simulate standard load or overloading respectively. When rectangular shapes are adopted, the contact area sizes and the distribution of pressure are varied. Conventional asphalt concrete and high modulus asphalt concrete are adopted. Simulations are done. The competences of the three pavement structures on fulfilling long lives are evaluated.
Uniform Experimental Design of Coarse Aggregate Asphalt Pavement
Authors: Ma Li Jie , Zhang Jin Yu
Published: August 2013

Coarse aggregate of asphalt mixture is crucial to the road performance. In this paper, by using the method of uniform design research, particle size of the aggregate were studied influence to CBR value with nominal maximum particle size 13.2mm aggregate. Further to determine the critical particle size grade by gray relational degree theory.
Evaluation of Rheological Properties of TLA and High Polymer Asphalt by DSR
Authors: Liu Wen Tsung , Chen Wei Chuan , Yang Hong Jia , Wei Ci Fan
Published: August 2013

In this study the high polymer materials and Trinidad lake asphalt are used as a modifier mixed by a specific proportion of base asphalt AC-20. There are modified asphalt, containing viscosity, penetration degree, ductility, softening point and film aging tests in this study. We get the values of temperature scanning, creep scanning and frequency scanning by Dynamic shear rheometer. These values are used to assess the rheological characteristics of a variety of modified asphalt. Thus they provide various reference materials on the pavement.
Surface Free Energy of Boron-Compounds Modified Poplar Veneer
Authors: Li Chen Chen , Qin Zhi Yong , Zhang Qian , Li Jiang Zhang
Published: August 2013

The contact angle of three different reference liquids (i.e. distilled water, diiodomethane, and formamide) was measured by the sessile drop method by gently placing droplet onto the surface of the boron-compounds treated poplar veneer in this study. The permeability of the modified poplar veneer was evaluated. The surface free energy, as well as two components, namely, Lifshizvander Waals(LW) and Acid-base(AB), were calculated by the Acid-base theory, whereas the polar and nonpolar components were calculated according to the OWRK theory. The result shows that the initial contact angle of boron-compounds modified poplar veneer are significantly less than the untreated wood, which indicates that the wettability of boron-compounds polar veneer is better than the untreated wood. The same situation applies to the permeability. In addition, the surface free energy of boron-compounds modified poplar veneer is reduced, but the difference is very small.
Research on Motion Simulation Analysis of Rotary Parts Based on Solidworks
Authors: Ye Qing Yu
Published: August 2013

This paper introduces the practical application of the Solidworks motion simulation module, performs simulation analysis of rotary parts, and realizes the virtual assembly of the assembly. Then, we output and analyze the charts of motion parameters, in order to provide analysis data for practical state. In the meanwhile, we perform stress analysis of rotary parts by using finite element module of Solidworks, so that it can provide a certain reference value for practical running of rotary parts.
The Simulation Analysis on the Heat Transfer Model of Bloom
Authors: Zhai Ying Ying , Li Ying , Yan Chen , Ding Yu Shi
Published: August 2013

A mathematical heat transfer model was built to simulate temperature, shell growth and phase transformations in continuous casting based on the technical conditions of the bloom caster of some steelmaking plant. The simulation result is coincided with the measurement. The effects of the operation parameters including casting speed, bloom size and steel melt superheat on the solidification process were discussed and the means of enhancing the bloom temperature was brought forward. The research results have been applied in the practical manufacture process to compute the best casting speed, to control the flow rate of secondary cooling water and to optimize the spray pattern of secondary cooling zone. The bloom quality and productivity could be improved.
The Finite Difference Method for Two Models of Phase Transitions Driven by Configurational Force
Authors: Wang Guang Wu , Liu Zhen , Zhang Jun
Published: August 2013

In this paper, we study the finite difference solutions for two new models of phase transitions driven by configurational force. These models are recently proposed by Alber and Zhu in [2]. The first model describes the diffusionless phase transitions of solid materials, e.g., Steel. The second model describes phase transitions due to interface motion by interface diffusion, e.g., Sintering. We consider both the order-parameter-conserved case and the non-conserved one, under suitable assumptions. Also we compare the results of these two models with the corresponding ones for the Allen-Cahn and Cahn-Hilliard equations. Finally, some results about tending to zero are given.
Thermodynamic Analysis and Evaluation of Mixed Flowing Vibrating Drying System
Authors: Zhong Xiao Hui , Jin Zhen Huan , Zhao Bin
Published: August 2013

According to the characteristic of Yuzhou Danhou mine long flame coal, the drying processes of coal was study on mixed flowing vibrating drying system. The parameters were tested during the drying process, and thermodynamic process of drying were analysed, the result show that reducing the exergy loss of hot stove is the key point to improve the efficiency of drying system.
Modal Analysis of Cracked Beam Based on Modified Crack Model and Perturbation Method
Authors: Liu Long , Shen Jia Hui , Dong Da Shan
Published: August 2013

Structural modified crack model is deduced to analyze modal parameters of the damaged beam by using of perturbation method. Firstly, the optimal fitting formula of inertia moment at the damage location is proposed to consider damage's influence on structural stiffness and mass matrix. Then, the solutions of the first and second vibration perturbation equations are deduced. Compared with experimental results of simply-supported cracked beams, this method's reliability is proved.
Development of real-time reverse transcription polymerase chain reaction assays to quantify insulin-like growth factor receptor and insulin receptor expression in equine tissue
Authors: Hughes Stephen B. , Quan Melvyn , Guthrie Alan , Schulman Martin
Published: August 2013

The insulin-like growth factor system (insulin-like growth factor 1, insulin-like growth factor 2, insulin-like growth factor 1 receptor, insulin-like growth factor 2 receptor and six insulin-like growth factor-binding proteins) and insulin are essential to muscle metabolism and most aspects of male and female reproduction. Insulin-like growth factor and insulin play important roles in the regulation of cell growth, differentiation and the maintenance of cell differentiation in mammals. In order to better understand the local factors that regulate equine physiology, such as muscle metabolism and reproduction (e.g., germ cell development and fertilisation), real-time reverse transcription polymerase chain reaction assays for quantification of equine insulin-like growth factor 1 receptor and insulin receptor messenger ribonucleic acid were developed. The assays were sensitive: 192 copies/µLand 891 copies/µL for insulin-like growth factor 1 receptor, messenger ribonucleic acid and insulin receptor respectively (95%limit of detection), and efficient: 1.01 for the insulin-like growth factor 1 receptor assay and 0.95 for the insulin receptor assay. The assays had a broad linear range of detection (seven logs for insulin-like growth factor 1 receptor and six logs for insulin receptor). This allowed for analysis of very small amounts of messenger ribonucleic acid. Low concentrations of both insulin-like growth factor 1 receptor and insulin receptor messenger ribonucleic acid were detected in endometrium, lung and spleen samples, whilst high concentrations were detected in heart, muscle and kidney samples, this was most likely due to the high level of glucose metabolism and glucose utilisation by these tissues. The assays developed for insulin-like growth factor 1 receptor and insulin receptor messenger ribonucleic acid expression have been shown to work on equine tissue and will contribute to the understanding of insulin and insulin-like growth factor 1 receptor physiology in the horse.
Models in the construction of female identity in Nigerian postcolonial literature
Authors: Oloruntoba-Oju Omotayo , Oloruntoba-Oju Taiwo
Published: August 2013

Gendered identity in Africa has for centuries been a hotbed of ideological and narrative contestations. While colonial constructions of the African female were generally essentialist and negative in character, early postcolonial African literature also ironically deployed essentialisms and rigid gender binaries to portray African womanhood, thus prompting a challenge of both by female African writers of the first generation. However, in a significant twist, second generation Nigerian women writers were to restore the related tropes of wifehood and motherhood to the front burner. This article examines the corresponding models of representation of gendered identity and the inherent, and complex, negotiation of gendered power relations over time in Nigerian postcolonial literature. These models, which we describe here as “essentialism entrenched”, “essentialism challenged” and “essentialism negotiated” are examined against the background of gender theory and African womanist discourse. The essay observes that the resurgence of motherhood, albeit in mediated/transformative forms in Nigerian women writing, underscores the continuing challenge of culture in the formation of African gendered identities and in relation to societal development. The work of Akachi Ezeigbo, a leading Nigerian female writer of the second generation, is used in the article to illustrate this resurgence and its interface with womanist theorizing.
A personal text owned by its public— changing readings of Sarah Raal’s Met die Boere in die Veld
Authors: Drwal Malgorzata
Published: August 2013

What seems to be a typical feature of Boer women’s personal texts which refer to the Anglo-Boer War (1899–1902) is the militant rhetoric of protest against the British aggression. Met die Boere in die Veld (“With the Boers in the Veld”) by Sarah Raal is a perfect example of this trend. Yet, her case is unique, because she actually spent a part of the war in the veld, fighting side by side with her brothers, which definitely was not a traditional place for a woman during a military conflict. Her memoirs were published for the first time in the 1930s, reprinted a number of times, and re-issued in 2000 in two language editions— Afrikaans and English (significantly under a new title, The Lady who Fought). An additional introduction was added to both new editions, which suggests a new role of the heroine and a new meaning of her story. This paper discusses how Raal’s original foreword and the new introduction influence the reader’s response to the text. Additionally, attention is drawn to the role of other paratextual elements of the book and the matter of translation. Having taken into account political and gender discourses operating as a context for every reading, the text undergoes re-interpretations. Consequently, the book, once an anti-British Afrikaner nationalist propaganda story, turns into a popular adventure tale about a brave Boer girl, a story about an exceptional woman, a proto-feminist who transgresses the conventional gender roles, or into a universal pacifist protest. In the 2000 edition pacifist and feminist aspects come to the foreground, and this way the old story becomes a suitable read for the modern post-apartheid reader.
Lupus Profundus (Panniculitis): A Potential Mimic of Subcutaneous Panniculitis-like T-Cell Lymphoma
Authors: Arps David P. , Patel Rajiv M.
Published: August 2013

Lupus profundus is a rare manifestation of cutaneous lupus erythematosus, seen in 1% to 3% of patients. It most commonly presents in association with classic chronic cutaneous lesions of discoid lupus erythematosus; however, such lesions, as well as a clinical history of lupus erythematosus, may be lacking. The differential diagnosis for lymphocytic lobular panniculitides is broad; however, the consideration of subcutaneous panniculitis-like T-cell lymphoma is most critical. Recently, there have been several reports emphasizing the overlapping histomorphologic features between lupus profundus and subcutaneous panniculitis-like T-cell lymphoma. Although this is controversial, some authors suggest that patients with lupus profundus are at risk for the development of abnormal, clonal T-cell proliferations and/or overt subcutaneous panniculitis-like T-cell lymphoma. In cases of atypical lymphocytic lobular panniculitis that fail to meet diagnostic criteria for subcutaneous panniculitis-like T-cell lymphoma, patients should be clinically followed indefinitely, as future subcutaneous lymphoma cannot be excluded.