bluuebunny/crossref_metadata_2025 huggingface dataset:
Accurate Modeling for Plate Cam with Autocad and other Software Combined
Authors: He Fa Wei
Published: December 2012

For three-dimensional modeling of cam profile, we can draw the cam profile firstly, and then stretch it to form a three-dimensional graphic. When drawing, the difficulties exist in how to draw the two-dimensional graphic rapidly and accurately. Accurate calculations can be done with Excel. It will be a very good method to insert data to AutoCAD with required format to form the graphics. After forming the two-dimensional graphics, three-dimensional graphics can be done after several procedures. It is much significant for accurate drawing and CNC automatic programming processing for cam profile, and get high-accuracy plate cam.
The Design and Implementation of 3D Visualization Pipeline Information System Based on 2D Figures
Authors: Li Hong Yi , Chen Yue , Zhao Di
Published: December 2012

Currently, many designers for pipeline network, such as the municipal drainage pipelines, oil/gas transport pipelines, use AutoCAD to design their drawings which demonstrated in a 2D view. For professionals, it’s easy to view and modify their design. But for common users who usually have little professional knowledge on pipeline design, a 3D scene view is more intuitive. To this end, we propose the architecture and implementation of pipeline network information that has facilities such as reconstructing the 3D scene of a pipe network from 2D AutoCAD files (.dwg files).
Study on Influence of Nozzle Structure on Flow in Diesel Nozzle Orifice
Authors: Li Bing , Hu Xue Song , Cao Xiao Feng , Jia Gui Qi , Xie Fang Xi , Hong Wei
Published: December 2012

The fuel flow characteristics in diesel nozzle orifice are key factors to the atomization of fuel near the nozzle orifice. In the paper, two-phase flow model is used to simulate the complex flow features in nozzle orifice, and to study the influences of the relative position of nozzles orifice axis and nozzle axis, and inclination angle of nozzle hole on the internal flow feature.
Study on Making of the Motor Test Cycle and Evaluation Criterion of Hybrid Electric Vehicle
Authors: Wen Jing , Chu Liang , Wang Jun Nian , Yin Jian Kun , Wang Yan Bo
Published: December 2012

In order to make the motor test and evaluation of hybrid electric vehicle (HEV) can better reflect the requirements of the driving cycle to the motor of the HEV. First, the definition of motor test cycle and its feasibility is discussed. Second, according to traction motor working distribution under the actual driving cycle, motor test cycle is made using the statistical tool and the method for its test and evaluation is proposed. Third, the feasibility of motor test cycle is verified by the test on the test bench.
Experimental Study of the Influence of Impact Mass on Damping Performance of Impact Dampers
Authors: Zhu Yan , Zhu Shi Shun , Liu Wu Quan , Hu Shun Tang
Published: December 2012

We present a simulating experimental method used for studying the influence of impact mass on damping performance of impact dampers. The free mass in the impact damper had equal total mass but different size individual. We tested the damping effect of the damper under the same external force separately. The main results obtained in the experiments indicated that the impact damper had a good damping effect in the resonance region of the main system. The mass value of the free mass participating in vibro-impact was variable. In addition, the damping of the main system was related to the size of the free mass. In the conditions of equal total mass and same material, the size of the free mass was smaller, the effect of the vibration control was better.
A Real-Time Microseismic Monitoring System Based on Virtual Instruments
Authors: Cai Jing Lu , Yu Wei , An Feng Ping
Published: December 2012

Many geologic hazards, such as rock burst coal and gas outburst, have an inevitable connection with microseismic phenomena in rock mass. In order to provide accurate evidence of underground safety monitoring, inspecting microseismic signal is a good way to make sure the range and the level of underground rock breaking. Previous microseismic system using DSP or singlechip can’t obtain the desired data collection, neither for the achievement of advanced algorithm. The real-time microseismic monitoring system realizes the acquisition of multiple microseismic signals and uses wavelet transform algorithm, which gives full scope to the advantages of virtual instruments. The monitoring result was very similar to actual rock burst and the error of orientation results was minor to prescriptive upper limit, which means this new system completes the monitoring of real-time microseismic emission effectively.
Study on Detection Technique of Complex Profile for High Speed Cutting
Authors: Li Shi Chun , He Ren Qi , Huang Jian Ming , He Fang
Published: December 2012

analyzes the detection technique of complex profile for high speed cutting, establishes the concept of the correct detectability in the detection of curved surface, put forward the detection method, detection principle and error criterion of point-to-point, point-to-line based on geometry topology relation .
Design and Simulation of a Novel Micro-Mixer for Detecting Cell Status in Bio-Artificial Liver
Authors: Cao Yue , Wu Chang Zhe , Huo Xiao Lin , Li Ming
Published: December 2012

Purposes: To improve the mixing effect in micro-scale for detecting liver cells status timely in bioreactor and improving liver cells growth environment to ensure efficacy of the bio-artificial liver support system(BLASS). Methods: Alanine aminotransferase(ALT) was chosen as an indicator to evaluate the status of liver cells by detecting the absorbance of ALT. A double-layer micro-mixer was designed and optimized to achieve efficiently mix between serum and ALT detection reagent. Results: The simulated results show that the optimized size of the micro-mixer is that the junction length L is 25 μm and the confluence width W is 50 μm. In this structure, satisfactory mixing effect can be achieved. Conclusions: This micro-mixer combines the superiority of active and passive mixer to achieve fast, efficient and easy control mixing. It laies the foundation for online monitoring of liver cells and will help to improve the viability of liver cell in the bioreactor.
Quality Disturbance Recognition Based on the Generalized-S Transform
Authors: Liu Bin , Wang Xi
Published: December 2012

In order to achieve the power quality disturbance signal feature extraction and automatic classification of power quality disturbances based on the generalized S transform to identify the improved algorithm, the generalized S transform results according to the power quality disturbance signal, extract the characteristics of power quality disturbance signal, to achieve power quality disturbances automatic identification of the signal. Through a standard sinusoidal signal simulation examples prove that the algorithm has high noise immunity, simple structure, and high recognition rate.
Research on the Power-Frequency Electric Field Measuring System Based on GPRS
Authors: Zhu Xiao Yan , Xu Yong , Jin Ting Bo , Wu Jin Hua , Hu Hong Wu
Published: December 2012

First analyze the spherical sensor measuring's principle, a measuring instrument of power-frequency electric field based on the GPRS wireless data transmission are designed. Compared with the traditional, it has the advantage of the power frequency field strength environment for real-time monitoring and remote control. Adopting the wireless transmission, thus overcome the defect of short transmission distance, poor real-time capability, and poor reliability. The staff through the PC can be achieved on the field measurement of regional control Establish the power frequency electric field calculation model. the simulation of the 500kV single circuit of high voltage transmission lines in the same tower, Finally The results show that the system have higher sampling accuracy and more reliability of data transmission.
Experimental Characterization of APD and Design of Quenching Circuit for Single-Photon Detection
Authors: Lü Hua
Published: December 2012

In this paper, we experimentally characterize the Inga As/Imp avalanche photodiode (APD), which is working in Geiger mode, so as to choose the single photon detector for quantum communication. Due to the fact that bias of APD tends to be flat after avalanche, we first adopt the methodology of passive quenching to determine dark breakdown voltage. Experiment results indicate that temperature reduction will widen the optimal operating region and increase the optimal multiplication; therefore APD will be more sensitive. Epitaxial APD is the best choice for single-photon detection among the APDs we have tested for its low noise level and high signal-to-noise ratio (SNR). Finally, we design a mixed passive-active quenching integrated circuit with gate control, which is quick with the quenching time of about 25ns and has controllable dead time with minimum of about 60ns.
The Reflection of Measuring Method about the Volume of Coagulation-Water in the Compress-Air Bottle
Authors: Zhao Jun , Zhao Zhi Liang
Published: December 2012

When the compress-air bottle is used it appears a phenomenon that the coagulation-water is remained in the bottle. The coagulation-water not only will diminish the dimension of the compress-air bottle but also bring chemical reaction to affect the whole intensity, resistance to pressure and life of the bottle. A new opinion is brought forward about using gas status equation to compute coagulation-water the compress-air bottle, we can gain a master of the volume of coagulation-water and improve the accuracy of measuring. It is important to use the compress-air bottle with safety
Research on Simulation for the Mechanism of Knowledge Potential Difference between Enterprises in the Industrial Cluster on Knowledge Transfer
Authors: Han Ming Hua
Published: December 2012

As an important part of the knowledge management activities, knowledge transfer is effective way that the cluster enterprises to gain, learn and accumulate their own knowledge. In this study, we analyzed the mechanism of the knowledge potential difference between enterprises in the industrial cluster on knowledge transfer. Through establishing a cellular automata model, the paper simulated the process of knowledge potential difference effect on the knowledge transfer between enterprises within the industrial cluster. The simulation results indicate that the knowledge distance has remarkable impact on the knowledge transfer between cluster enterprises, and only the proper knowledge distance will be more conducive to the knowledge transfer between cluster enterprises.
Flow Field Numerical Simulation on a Continuous Powder Surface Modifying Machine for Non-Metallic Material
Authors: Wu Cui Ping , Zheng Shui Lin , Luo Jian Jun
Published: December 2012

In order to study the two-phase flow field in the SLG continuous powder surface modifying machine for non-metallic material, which have been widely used in the powder engineering of China, a three-dimensional CFD model is developed to make the numerical simulations of the inner gas-particle flow field based on the industrial SLG-3/600 type modifying machine. By the help of the Fluent software, the gas velocity field, pressure field, particle concentration field and moving trace of the two-phase flow field are obtained. The simulation results indicate that these fields are distributed non-uniformly in the SLG modifying machine. Besides, a shortcut phenomenon is observed during the moving of the particles. The numerical simulations can not only depict the flow characteristics inside the SLG modifying machine, but also present useful reference to the mechanism study and optimal design to further improve its structure and working parameters in the future.
Design of a Multi-Core System for Cipher Processing Base on NoC
Authors: Li Xiao Nan , Dai Zi Bin , Zheng Yang Yong , Wu Xiao Hong , Wu Zai He
Published: December 2012

To improve the flexibility and adaptability of the existing multi-core cipher system, this paper designs a multi-core cipher processing system based on NoC. By enlarging the cipher processing instructions on the RISC architecture, this system ensures the performance and flexibility of algorithms on the multi-core system. In addition, this paper designs dedicated data frames architecture for cipher processing and proposes a assignment partition mechanism for differ-ent application conditions. The system has finished the prototype verification on the platform of FPGA. The result shows that the system can realize the common algorithms flexibly, and the per-formance can reach 1Gbps.
The Unsteady Dynamic Analysis of Football during Rotation
Authors: Ma Jun
Published: December 2012

This paper uses infrared high-speed camera the QUALISYS-MCU500 infrared monitoring of long-range system, when football players kicked out football, we make the soccer unsteady dynamic analysis of nonlinear algebraic modeling, the modeling accuracy, the adjustment factor number, and then give the coefficient matrix, and finally calculate the law of motion, according to the modeling results, we calculate the curve giving the football spins.
Influence of Dust Emission on Xi’an Atmospheric Organochlorine Pesticide Pollution
Authors: Zhou Bian Hong , Zhang Cheng Zhong , Gao Jian Hua
Published: December 2012

The four north-central Shaanxi OCPs observed surface concentration of farmland were analyzed via GC-MS and GC/ECD, respectively, Xi’an observation area 6.110 ng•g-1, Tongchuan observation area 0.817 ng•g-1, Yan’an observation area 3.018 ng•g-1, an observation area in Yulin 5.286 ng•g-1, respectively. Be observed over the same period in Xi’an concentration of OCPs in air 325.773 pg•m-3, where the concentration of particles OCPs 160.883 pg•m-3, the concentration of gaseous OCPs 164.890 pg•m-3.Xi’an urban air particles and gas field surface soil OCPs and the OCPs was correspondence between the basic components of content, indicating that much of Xi’an OCPs in the air of dust released from the soil. The results show that the observation area at the same time with different content of each component of different OCPs, DDTs maximum concentration, mainly in the form of p, p’-DDT, BHC, followed by HCHs, mainly in the form of β-HCH; air, gas-eous and OCPs There are two forms of particulate, HCHs gas content was significantly greater than the particulate phase, DDTs substances content of particles greater than the gas content; OCPs in soil content and the physical nature of the soil, HCB, Chlordane, TN+CN and soil organic matter Content showed a significant positive correlation, chlordane, endosulfan, EnSO4 and soil acidity was a significant positive correlation, HCHs, DDTs and soil acidity were some negative.
Research on Settlement and Deformation Characteristics of Peat Soil Roadbed
Authors: Han Yu Min , Liu Yan Ling , Che Guo Wen
Published: December 2012

In order to predicate the value of roadbed settlement in peat soil area, and adopt proper groundwork disposal method, based on ground distortion principle and subsidence and consolidated computation analysis, the paper carries on theoretical analysis and forecast to the rule of peat soil ground lamination subsidence and final settlement time-space variation. By the contrast theoretical analysis of peat ground to subside, the theoretical result and actual monitor data fit well, and it proves that adoptive theories and parameters are appropriate. These instruct practical significance to design and construction.
Physical Properties and Main Controlling Factors of Low-Permeability Sandstone Gas Reservoir
Authors: Li Zhi Jun , Li Shu Qing
Published: December 2012

In order to guide the resource prediction and exploration evaluation of low-permeability sandstone gas reservoir, the physical properties of this kind of gas reservoir are summarized from such aspects as lithology, porosity, permeability and the characteristics of capillary force, and the main controlling factors of the gas reservoir are analyzed. The analysis show that low-permeability sandstone gas reservoir is mainly characteristic of high capillary pressure, high bound water saturation, low and high porosity as well as low permeability. Rock composition and structural characteristics of the reservoir is the basis of the factors that can affect the compactness of the reservoir. The formation of the reservoir is mainly affected by deposition, diagenesis and late tectogenesis: deposition can affect the composition of minerals, the original physical properties of clastic sediments and others; diagenesis is the main stages of the densification of reservoir, where compaction, pressure solution, cementation and late dissolution are the causes of the densification of reservoir. Dissolution and rim chlorite cementation improve reservoir property; tectonization can have an effect of late transformation on the physical properties of clastic reservoir. At the same time, the fluid characteristics in the reservoir can also affect the permeability of reservoirs.
The Baer Depression Tuffaceous Sandstone Reservoir Characteristics and Logging Response Research Status, Problems
Authors: Su Si Yuan , Zhang Chun Wei , Chen Hai Feng , Zou Qing Tian , Li Peng Fei
Published: December 2012

In logging field, saturation evaluation in tuffaceous sandstone reservoirs has been a difficult issue to be solved urgently. It is mainly due to the effect of complex pore structures in tuffaceous sandstone reservoirs. Compared with the normal sandstones, the tuffaceous sands have the properties of diversity origination, complex mineral components, easily transformed mineral, complex digenesis and porosity evolution .The comprehensive analyses of cores, thin slices, SEM, mercury-injection data and former research outcome of Beier oilfield on the porous structure and reservoir physical property of sandstones. The tuffaceous alteration is different under different burial phase and diagenetic environment and has different effects on the porosity of coarse grain have a constructive affection to the secondary porosity.
Regularity of Dust Distributing in Fully Mechanized Caving Face and Negative Pressure Spray Dust-Settling Technology
Authors: Nie Wen , Cheng Wei Min
Published: December 2012

The mathematical model of solving two-phase flow of gas and dust particles was built by established the k-ε equation. Moreover, by basing on Eulerian-Lagrangian model and using FLUENT software, the diffusion rule of dust pollution in full-mechanized caving face was confirmed. Based on negative pressure spray dust-settling mechanism, negative pressure spray technology was developed between hydraulic supports, in drawing opening position and shearer, and it was determined by the optimal spray pressure for 4 MPa. After negative pressure spray technology was applied in fully mechanized caving face, the dust concentration was down significantly.
A Design of Intelligent Car Based on STC89S52 Single Chip Microcomputer
Authors: Wang Yan Quan , Wang Gang
Published: December 2012

With the development of production automation and science and technology level, the intelligent level of the car is continuously improved. For intelligent car, with STC89S52 single chip microcomputer as its core of control, the direction and speed of it is controlled by the collection and processing of the signals from various kinds of transducers in the forward path. Therefore, the functions of automatic identification of black guide line applied to rapid and steady running status of the car and the obstacle color discrimination applied to direction selection during the course of running and other relevant functions can be realized. In this system, a DC motor is used for the forward and steering movement of the car, a LCD1602 is used for the display of its travel time, and a dual power supply by which system stability can be enhanced is used for the motor and control system respectively. Besides, the system control software is designed to be a combination of software and hardware, through which the anticipated functions of the car is ultimately realized.
Finit Element Analysis and Optimum Design of Time-Sharing 4WD Vehicle Main Reducer
Authors: Hu F. , Chen L.Q. , Qi B. , Chen W.W.
Published: December 2012

By carrying on the stress and transform analysis of the box of a kind of main reducer which was self— designed and manufactured for vehicles, by ROMAX modeling get accurate bearing load and conducting ANSYS finite element analysis. it is shown that structure design of the main reducer box is very important for the intension capability of the box, and for the transmission functions of the main reducer. The hidden trouble of the main reducer transmission due to the designers was solved, which couldn’t estimate the transform of main reducer box by traditional design method, and provided the necessary basis for further optimizing and ameliorating the whole transfer case system. By using the UG software we constructed a complicated model of the box, and carried on a series of accurate intension and fatigued analyses for the model by using ANSYS software.
Application of 23 Factorial Design Experiments for Gas Tungsten Arc Welding Parameters on ASTM A36 Steel Welds
Authors: Peasura Prachya
Published: December 2012

ASTM A36 carbon steel is the most commonly available of the hot-rolled steels. This specification covers carbon steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of bridges and buildings, and for general structural purposes. The research was to study the in effected of gas tungsten arc welding parameters which effects the hardness and physical characteristics of welding for carbon steel ASTM A36. The specimen was carbon steel sheet metal 6 mm thick. The 23 factors experiment was used polarity direct current electrode negative (DCEN) and alternating current (AC), welding current at 90 and100 amperes with tungsten electrode angles at 30 and 60degree. The weld sample was test by hardness and penetration. The result showed that polarity, welding current and tungsten electrode angle had on interaction on hardness and penetration at 95% confidence (p-value < 0.05).The factors made maximum hardness was polarity AC, welding current 100 amp. and tungsten angle 60๐of 803.16 HV. The factors made maximum penetration was polarity DCEN, welding current 100 amp. and tungsten angle 60๐ of 2.71mm. The research data can be used to determine the appropriate gas tungsten arc welding process of carbon steel weld.
The Effect of Different Multi-Point Initiation on the Formation and Penetration of Annular EFP
Authors: Liu Jie , Du Zhong Hua
Published: December 2012

Using LS-DYNA software, this paper studies the problem of an annular multi-point initiation circuit applied to an annular EFP charge, and the effects of annular EFP formation with configuration parameters of shaped charge of variable wall thickness semicircle liner by two different number of 36 initiation points and 72 initiation points. The study shows that the speed of the annular EFP with 36 initiation points arrives more than 2400m/s, and the annular EFP has the characteristic of well formation, no dispersible, energy concentration, high energy efficiency and so on. Additionally, the depth of hole is more 5.4mm than the depth of hole which is penetrate by the annular EFP with 72 initiation points. These study results provide important reference to the design of warhead.
Design of the Compact Ultra-Wide-Band Filter Based on Composite Right/Left Handed Transmission Line
Authors: Pan Wu , Li Guo Xin , Li Ting Ting , Huang Shu Lin
Published: December 2012

In this paper, an Ultra-wide-band (UWB) filter based on composite right/left handed transmission line (CRLH TL) is presented. The structure of the proposed band-pass filter is quite simple, of which the size is 0.5cm×1.5cm. Left-handed capacitor is obtained by couple of microstrip lines, and Left-handed inductance is obtained by the grounded stub. The simulated results indicate that the pass band of UWB filter is 3.4-11GHz, the insertion loss is less than 1 dB and the return loss is smaller than -12.5dB. The performance of UWB filter could meet the requirement of UWB communication systems.
An Analysis of Machanical Properties about the Fracture and Deformation Exiting in the Section of Round Steel with Software-SW/Simulation
Authors: Chen Shang Kun , Li Rui Fang
Published: December 2012

Aim at the deformation occurred on round steel section by abscission machine, use the software-SW/simulation to make a research about the deformation mechanism existing in the fracture, we found that the round steel fracture took place first near fixed blade ‘edge and more plastic deformation centralized in the domain like "crescent shape". The result is theoretically useful for improving the section deformation and optimizing the blade structure of round steel cut-off machine.
Study of the Spatio-Temporal Data Model in Sea Battlefield
Authors: Sun Yue Lin , Bao Lei , Peng Yi Hang
Published: December 2012

An effective analysis of the battlefield situation and spatio-temporal data model in a sea battlefield has great significance for the commander to perceive the battlefield situation and to make the right decisions. Based on the existing spatio-temporal data model, the present paper gives a comprehensive analysis of the characteristics of sea battlefield data, and chooses the object-oriented spatio-temporal data model to modify it; at the same time this paper introduces sea battlefield space-time algebra system to define various data types formally, which lays the foundation for the establishment of the sea battlefield spatio-temporal data model.
Improved Fuselage Design for Crashworthiness
Authors: Peng Liang , Wan Xiao Peng , Zhao Mei Ying
Published: December 2012

The principles of fuselage design for crashworthiness are analyzed based on investigating the theory of energy and momentum to the impact of an aircraft’s crash on occupants in order to increase the chance of survival for occupants. It indicates that minimizing the amount of bumped soil leads to the reduction of resistance from soil to the aircraft while crashing along the y-axis direction (horizontal) and increasing the energy absorption improves the crashworthiness of the aircraft along the z-axis direction (vertical). The deformation of the aircraft cabin and the acceleration of the occupants during a crash are the two most important factors to consider for crashworthiness. The improved fuselage design for crashworthiness is proposed for both y-axis and z-axis directions. Suggestions for the crashworthy fuselage design are given in order to obtain high performance of crashworthiness design, which is meaningful to the future design for fuselage’s crashworthiness.
Mechanical Analysis of the Gear Based on the UG Parametric Modeling
Authors: Wu Li Mei , Wang Yan Rong , Li Yong Zhao , Yang Fei
Published: December 2012

When gear is working, the size of contact stress with tooth surface directly affects its service life and security. In this paper, creates a three-dimensional model of parametric gear by the UG parametric modeling tool, then transforms the modeling data and imports into ANSYS to analysis the loading-velocity of gear and the compressive stress produces through gear meshing. Finally, gets the distribution and the change rule of equivalent contact stress with tooth surface when produced radial displacement and in the case of several teeth contacted in gear running. Introduction
A Gas Monitoring System Based on a Sensor Network
Authors: Meng Qing Rui , Guo Chu Wen , Quan Jie , Hu Zhi Peng
Published: December 2012

Gas monitoring of roadway excavation of coal mine is of utmost importance, to monitor the gas distribution more effectively, the following works were carried out. Taking a rectangular tunnel as research object, the distribution law of the gas was simulated by using commercial software FLUENT, a simulation test bed was built according to similarity theory and sensors arranged according to simulation results to form a sensor network, BP neural network was adopted in process of acquired data. The results show that it is of accuracy and feasibility to provide theoretical basis for arrangement of the network sensor by simulation results of gas distribution. By using a BP network, the sensor network can be used to predict the gas concentrations accurately.
Dissipative Control of Singular Systems by Proportional Plus Derivative State Feedback
Authors: Xing Shuang Yun , Jing Xin , Cao Yang
Published: December 2012

This article deals with the problem of dissipative control synthesis for a class of descriptor systems with uncertainties in the derivative matrix. Attention is focused on the design of a proportional plus derivative (PD) state feedback, which guarantees that the closed-loop system is robustly stable and strict dissipative. Firstly, a sufficient condition for the closed-loop system is robustly stable and strict dissipative is presented by using a simple idea of changing the problem to the corresponding problem of an augmented uncertain system. Then, a PD controller is constructed by solving LMIs. Finally, a numerical example is given to demonstrate that the proposed method is effective.
Fan Injecting Mold Design and CNC Process Based on Pro/Engineer
Authors: Lu Ming
Published: December 2012

The method to design fan injection mold by software Pro/Engineer Wildfire has been described in the paper. And the CNC programming module has been used to the analog of producing process to verify the design and manufacturing superiority of mold by application software Pro/Engineer.
Mechanism Design of De-Icing Robot and its Auxiliary Equipment for High-Voltage Transmission Lines
Authors: Zhang Yi , Han Jun , Zhu Da Lin , Ai Fu Zhou
Published: December 2012

Based on the present study of the de-icing robot for high-voltage transmission lines, a new kind of de-icing robot for transmission lines and its auxiliary equipment for hoisting and lowering the robot are designed. The operation of the robot mainly includes four modules: walking module, de-icing module, obstacle negotiation module and hoisting-and-lowering module. The robot’s walking is driven by the rolling of the idler wheel, the de-icing is realized by combination of knocking and cutting, the obstacle negotiation part relies on the rotary telescopic arm’s coordinate crisscross motion with the box, and the motion of the hoisting-and-lowering device is based on the fixed pulley principle. The de-icing tests in laboratory and field demonstrate that this new kind of robot can walk autonomously and de-icing well on the transmission line, it has good de-icing effects, and the auxiliary equipment for hoisting and lowering the robot is safe and feasible.
Research on the Technology of Order Change for Machine Manufacturing Enterprises Information
Authors: Chen Jian Qing
Published: December 2012

Order changes too frequently or even out of control, will have very adverse effects on their business; therefore the control of change orders is essential. This paper first analyzes the characteristics and forms of mechanical order changes, and then the application form finishing methods on the classification of the demand for change orders and change orders, and finally the general machinery enterprises in order to change the audit process and principles.
Dynamic Simulation of Concrete Pump Truck’s Boom System Based on Rigid-Flexible Coupling Model
Authors: Yang Ping , Wang Rui , Shao Yu Hong , Lv Peng Min
Published: December 2012

The concrete pump truck’s boom system of 5 booms is taken as the research object in this paper. Combined with finite element theory and multi-body dynamics theory, a rigid-flexible coupling model of concrete pump truck’s boom system is established by modal synthesis method. With the measured displacement-time curve of turntable as the excitation, the booms’ pumping process in horizontal mode is simulated by the dynamic simulation software ADAMS. Through the field experiment results, the rationality of the modal is verified. It provides an effective method for dynamics analysis and structure improve of the concrete pump truck’s boom system.
Influence of the Stiffeners on the Vibration Characteristics of a Stiffened Plate and Shell Coupled Structure
Authors: Zhao Zhi Mei , Sheng Mei Ping
Published: December 2012

A coupled vibration model of a stiffened cylindrical shell with a stiffened interior plate is established based on the receptance method to get the stiffeners' influence on the plate-shell coupled structure's vibration characteristics. Numerical analysis on how an increase of the plate's and the shell's stiffener number affect the combination's vibration is carried out. It shows that the amplitudes of both the plate's and the shell's acceleration levels would reduce and peaks of their vibration curves would shift to the higher frequency range as stiffeners on the plate increases. And increase of the shell's stiffener number has little impact on the plate's acceleration level curve except for some peaks, but it would reduce the shell's acceleration level.
Design Factor Analysis of Fiber Metal Laminates under Concentrated Load by Using Design of Experiment
Authors: Nam Hyun Wook
Published: December 2012

This research studied quality engineering design of FML (Fiber Metal Laminate) under concentrated load. 1st DOE (Design of Experiment) was conducted to find out vital few Xs. 16 experiments were performed and their results were statistically analyzed. Pareto chart analysis shows that the thickness of fiber prepreg and metal laminate are more important than the material property of fiber prepreg or stacking sequence angle. Also, the stacking sequence of 1st layup prepreg is more important than that of 2nd layup prepreg. The main effect plots shows that the maximum deflection of FML is minimized with increasing layer thickness and modulus of metal laminate. 2nd DOE was conducted to obtain RSM (Response Surface Method) equation. 27 experiments were conducted. The CCD (Central Composite Design) technique with four factors was used. The coefficient of determination (R2) for the calculated RSM equation was 0.97. Optimum design was conducted using the RSM equation. MMFD algorithm was used to optimum design. Optimum values for thickness of prepreg, thickness of metal, modulus of metal, fiber orientation 1 and fiber orientation 2 are 0.135mm, 0.135mm, 80GPa, 0O, 0O, respectively. Quality engineering design was conducted to find out guideline for control range of design parameter. To acquire six sigma level reliability, the standard deviation of design parameter should be controlled within 1% of average design value
Micro-Behavior of Inclusions in X80 Pipeline Steel under Tensile Loading
Authors: Zeng Yan Ping , Li Shao Hua , Tong Ke
Published: December 2012

Specially designed SEM in-situ tensile tests have been conducted to trace the entire process of crack initiation and propagation induced by inclusions in X80 pipeline steel. The main inclusions are complex oxides containing aluminum, calcium and magnesium with round or oval shape, and their sizes are in the range of 3~20μm. Cracks initiate firstly in inclusions and also easily initiate among inclusions if they distribute in the steel as an inclusion chain. The size of an inclusion has little effect on the initiation stress of the first crack, which mainly depends on the yield strength of the steel. Once a crack initiates in X80 pipeline steel, it zigzag propagates along the direction of maximum shear stress that orients in about 45° to the loading direction till failure. In the process of crack propagation, the crack experiences propagation, anti-crack, bluntness and new micro-cracks initiation again and again. These valuable experimental results reveal the harmful effect of inclusions in micro-scale and are helpful for understanding failure mechanisms of the advanced steel components.
Manufacture and Mechanical Properties of Biocomposite Made of Reed and Silvergrass
Authors: Liao Cheng Bin , Deng Yu He , Wang Xin Zhou , Fan Xiang Lin , Yu Tian , Yang Ying
Published: December 2012

Reed and sivergrass are natural biological materials, the process parameters of being used as raw materials of biocomposite were determined. Microscopic structure of reed and silvergrass was characterized by environment scanning electron microscopy. Best reed-silvergrass particleboard process parameters were drawn from orthogonal test, that adhesive addition is 14%, press temperature is 1800C, and press time is 7min. The effects of reed/silvergrass particles mixing ratio on mechanical properties of reed-sivergrass particleboard were also discussed, mechanical properties of reed-silvergrass particleboard reached the maximum value at reed/silvergrass particles mixing ratio 3/2.
Elemental Analysis of Reed and Manufacture of Composites Using Mixture of Reed and Poplar
Authors: Wang Xin Zhou , Wu Jing , Deng Yu He , Liao Cheng Bin , Fan Xiang Lin , Wang Xiang Ge
Published: December 2012

Reed is a natural biological material and has great potential as reinforced material in bio-composites.The morphology and element contents of reed stem were investigated using scanning electronic microscopy equipped with energy dispersive spectrometer (SEM/EDS). And the effects of the mass mixing ratio of reed and poplar particles, dosage of water repellent on the physical and mechanical properties of reed/poplar composites were determined. Results indicated that the outside surface of reed stem has high silica content.The mass mixing ratio of 6:4 or 5:5 resulted in an optimum reed/poplar products. As the mass mixing ratio ranged from 4:6 to 10:0, the composites could be produced without adding additional water repellent. Therefore, it is possible to manufacture qualified reed/poplar composites by using urea-formaldehyde resin.
Different Modification Methods of Molecular Sieves Influence on CO2 Adsorption Performance
Authors: Wu Chang Zi , Jin Bao Sheng , Yu Lu Lu , Song Min , Zhong Zhao Ping
Published: December 2012

In this work, different types of amine-attached MCM-41 are prepared with different preparation methods. The poly (ethyleneimine) (PEI) and γ-(aminopropyl) triethoxysilane (APTS) are attached to the pore surface of MCM-41 silica. The comparison between impregnation of PEI and covalence attachment of APTS to the MCM-41 support are investigated. X-ray diffraction, Roman spectra, and Thermal analysis are used to characterize the obtained samples. The characterization results confirm that the amino groups are attached to the pore structure of MCM-41. The CO2 adsorption capacities of different amine attached MCM-41 silicas are investigated employing CO2 adsorption isotherm. MCM-41-APTS show a considerable CO2 uptake, suggesting their potential usage for the CO2 adsorbent.
Microstructure Characterization of Graphite Cathodes for Explosive Field-Emission
Authors: Chuan Jun Bing , Wan Hong , Yang Jie , Zhou Fan
Published: December 2012

Explosive field-emission graphite has the advantages of low cost, long lifetime, low outgassing rate and can operate stably at a large number of pulses, thus it has become an important candidate for repetition frequency, long-pulse high-power microwave (HPM) devices. In this paper, two types of graphite cathodes with different microstructures are investigated on their explosive field-emission properties. These cathodes are operated in a vacuum diode system at a voltage of 230 kV and a pulse duration of ~110 ns. The study reveals that the graphite cathode with smaller, cross-linked grains generates higher current at shorter current risetime compared to the cathode with larger grains. Furthermore, the microstructure defect regions of the graphite cathodes are more susceptible to destruction than the perfect microcrystalline regions during explosive emission process due to the combination effects of explosion of surface microprotrusions and Joule heating.
Mechanochmical Synthesis of a Mg-Al-H Complex Hydrides
Authors: Luo Xiao Dong , Zhang Jing , Liu Hao
Published: December 2012

Magnesium hydride is considered as one of the most interesting alternatives for the reversible storage of hydrogen. In this study,The feasibility and reaction process of different materials（Mg and pretreated Al powders(mainly composed of Al and Ni)）were discussed and investigated by thermodynamic calculation. The effects of material proportioning, mill time, mill energy density were also investigated by XRD analysis and TG-DSC technique, and analyzed the essence mechanism. The results show that nano-sized MgH2 and Mg(AlH4)2 could be directly synthesized by pure Mg and pretreated Al powder, The product composite hydrides release 2.7wt% H2 through multi-step decompositions, of which the starting endothermic peaks are as low as 265°C.
Application of Bioartificial Liver Reactor with Modified Membrane in Drug-Screening
Authors: Cheng Xiang Dong , Jiang Yong Sheng , Xiang Hai , Liu Wen Hong , Guo An Qi
Published: December 2012

The objective is to observe the advantage of the poly(vinylidene difluoride)-modified (PVDF-modified) bioartificial liver (BAL) reactors in the drug screening of Chinese herbs quercetin and resveratrol. The active ingredients of quercetin (0.1 mmol/L) was used to acted on rat hepatic cells for 12 hours both in the PVDF-modified and in the unmodified bioartificial liver reactors, then cisplatin (0.2 mmol/L) was added for 24 hours. Another Chinese herb resveratrol (0.1 mmol/L) was used with the same treatment. Finally, the synthesis of urea and albumin, the activities of lactate dehydrogenase (LDH) and aminotransferase (AST) were detected in these two cultured hepatocytes. Significant difference of the synthesis of urea and albumin was obtained between the PVDF-modified and the unmodified BAL reactors, and a less significant difference was for the activities of LDH and AST. The results showed that the PVDF-modified BAL reactor was more sensitive than the unmodified in liver toxicity and in activity of the liver-protective medicine. Hence, the PVDF-modified BAL reactor is more suitable for clinical drug screening.
Characterization and Effective Utilization of Volcanic Ash for Soil Improvement
Authors: Rifa'i Ahmad , Yasufuku Noriyuki , Omine Kiyoshi
Published: December 2012

Volcanic ash becomes environmental important issues as waste material if it is not effectively reduced or reused. In engineering practice, utilization of volcanic ash as substitution material is limited. Indonesia has a large road on soft soil and volcanic ash. The objectives of this paper are focused to study the characterization, classification and utilization of volcanic ash as soil stabilization material which give benefit in engineering practice and also be environmental friendly material. Engineering properties, mineral composition and soil mixture characteristics involve physical and mechanical properties are discussed. Result shows that the effect of addition of volcanic ash after curing time 14 days can improve the engineering properties of soft soil, decrease liquid limit, change curve of grain size distribution, increase bearing capacity, and decrease swelling potential. The soil-volcanic ash mixture with 35% of volcanic ash and 5% of lime is obtained as optimum mixture design. This result is still early stage and need further study.
Development and Characterization of Beverages from Tigernut Milk, Pineapple and Coconut Fruit Extracts
Authors: Abdulfatai Jimoh , Saka Abdulkareem Ambali , Afolabi Ayo Samuel , Diana Kadiri
Published: December 2012

Two species of tigernut tuber (yellow and brown i.e. fresh and dried) were processed in different ways to formulate three new products, Product 1-Apple Tigernut Beverage (ATB), Product 2-Pineapple Tigernut Beverage (PTB) and Product 3-Coconut Tiger nut Beverage (CTB). ATB, PTB and CTB were blends of Apple juice, Pineapple juice and Coconut milk with the Tiger nut milk (yellow and brown mixed separately) by substitution at ratio (YTM:AJ, BTM:AJ) (YTM:PJ, BTM:PJ) (YTM:CJ, BTM:CJ) 100:0, 80:20, 60:40, 50:50, 40:60, 20:80 and 0:100. These samples were evaluated for their chemical composition, physiochemical properties, vitamins, mineral content, sensory and shell life and the samples maintained a good statue. Statistical analysis was carried out in chemical composition of which the result significant difference (P ≤ 0.05) existed between yellow tiger nut milk brown tiger nut milk at 100:0, 80:20, 60:40, 50:50, 40:60, 20:80 but sample 0:100 of AJ, PJ and CJ were not significantly difference (P > 0.05). From the chemical composition results it was observed that the beverages had high content of moisture, carbohydrate and energy value. However, the beverages were fairly rich in protein, ash and fat contents. The microbial result of fungi was a bit at variance with standard record. Although, all samples were highly accepted but coconut tigernut beverage had the highest acceptability. Microbial content ranged from zero growth to 103cfu/ml which was not critical to the wholesomeness of the products. Furthermore, samples were stored in an air tight container in a cool place and were seen to last for 10 days before fermentation set in, hence, the presence of CO2 increased their shell life.
Parametric Effects of the Performance of Nanofiltration Membrane
Authors: Afolabi Ayo Samuel , Sanusi Kazeem Oladele , Abdulkareem Ambali Saka , Mohamed Jaafar Bux
Published: December 2012

The effects of pressure, concentration and feed temperature using a high pressure membrane filtration test rig capable of handling nanofiltration and reverse osmosis separation was investigated. The experimental results indicated that the applied pressure across the membrane has a significant positive influence on the flux produced and increasing the pressure will rupture the membrane if excessive force or pressure is applied. The high concentrations of solutes/molecules inhibit the flow of fluid through the membrane consequently lower fluxes and improved separation is and subsequently all variables, including their interactions, examined was found to be significant.
Design Square Grid Sandwich Plate Based on Equivalent Theory
Authors: Gu Jin Tao , Sheng Mei Ping , Han Fei
Published: December 2012

A square grid sandwich plate is modeled as a laminate plate in this paper, and the equivalent method is proved according to natural frequencies of the grid sandwich plate and the equivalent plate. Effects of geometric and material parameters on the equivalent Young’s modulus, equivalent thickness, and equivalent density are discussed and some conclusions are obtained:(1) effects of thickness of upper and lower panels on equivalent parameters are the same; (2) keeping the total thickness of upper and lower panels a constant, the equivalent thickness reaches its maximum while thickness of upper panel is equal to that of lower panel, meanwhile the equivalent Young’s modulus and equivalent density get to their minimum values; (3) the equivalent thickness and density increase with thickness of grid sandwich core; (4) the equivalent Young’s modulus decreases while the thickness of grid sandwich core increases; (5) the equivalent Young’s modulus increases with that of the grid core; (5) the equivalent density is inversely proportional to the equivalent thickness; (6) the equivalent Young’s modulus is inversely proportional to the equivalent thickness. These conclusions are helpful to design square grid sandwich plate.
Tracing of Concrete Hydration by Means of Impedance Spectroscopy (New Tool for Building Elements Testing)
Authors: Kusak Ivo , Lunak Miroslav , Schauer Pavel
Published: December 2012

Concrete setting and hardening designate the concrete grade. The impedance spectroscopy method, as one of the non-destructive testing method group, was used to characterize concrete specimens and track the changes in the concrete spectrum. Variances in the tan δ (f) and Im Z(f) or Re Z(f) of the specimens under investigation have been observed. The specimen quality has been described by means of the loss type prevailing in the material. The results of this study are expected to provide information about the correlation between the n-factor and the concrete setting time.