bluuebunny/crossref_metadata_2025 huggingface dataset:
The Feature Selectivity of the Phase of the Local Field Potential in the Primary Visual Cortex
Authors: Chen Shu Li , Wang Zhi Zhong , Shi Li , Wan Hong , Niu Xiao Ke
Published: August 2013

Phase is an important feature of the local field potential (LFP) and plays a significant role in transmission and processing information in visual system. In this paper, the LFP of Long Evans rats primary visual cortex is recorded by the microelectrode array through the visual stimuli of the checkerboard and different orientation gratings. Then, a multi-mode phase extraction model based on the firing spikes was built. We found that neurons selective orientation information using the third intrinsic mode functions of local field potential during firing spikes.
Levodopa Incorporation in Alginate Membranes for Drug Delivery Studies
Authors: Franco Margarida Rosa , Viana Tânia Filipa , Biscaia Sara , Bártolo Paulo
Published: August 2013

Parkinsons Disease (PD) is the second most common progressive neurodegenerative disorder and is referred as a leading cause of neurologic disability. The symptoms and signs of PD result from a decrease of dopamines level in the basal ganglia. Accordingly to this, exogenous substitution with dopamine agonists like levodopa, is used to correct the mechanical disorders at the early stages of the disease. Levodopa is referred as a standard in the treatment of PD. The modern studies of PD drug development and experimental therapeutics focuses on the concept of slowing and targeting the release of levodopa to prolong the therapeutic effect and reduce the number of administrations. The transdermal route was thought to be the best route for providing a progressive supply of levodopa to the systemic circulation. Alginate was chosen as a drug carrier because of its biocompatible and biodegradable properties and also because it has been widely used in drug delivery systems (DDS). The aim of this research work was to produce alginate membranes with and without levodopa. A solvent casting based methodology was used. Calcium chloride was assayed as crosslinking agent. Membranes were characterized using Differential Scanning Calorimetry (DSC) techniques. Drug release was evaluated using UV Spectrophotometry.
Design the Piston of Internal Combustion Engine by Solidworks
Authors: Zhao Shu Guo , Li Ke , Gao Zhi Xian
Published: August 2013

In recent years, digital simulation technology has been developing rapidly. Virtual piston is established by Solidworks easily. As is well-known that virtual piston can simulate the product all kinds of chatacter in the real environment. The results of simulation will be used to optimize piston design, in order to shorten the cycle, reduce the cost and improve the quality of products.
Design and Implementation of Optical Eccentric Detect System Based on S3C6410 and WinCE6.0
Authors: Wu Zong Hao , Cheng Xue Min
Published: August 2013

This paper introduces a control system based on ARM and WINCE for optical eccentric detector. The system adopts S3C6410 based on ARM11 architecture as the core chip controls the four-phase stepping motor to drive the rotation of mirror being tested, captured by the image sensor OV9650.It can capture the brightest point in each image, and fits multiple points from many images by least square circle fitting to get the optical eccentric value. Test results show that the system works well and gives stable data, with good real-time performance.
Overview on Micro-Grid Technology Research
Authors: Ma You Jie , Zhou Kun , Zhou Xue Song
Published: August 2013

Traditional central power supply and distributed generation have the advantages and limitations themselves. Micro grid technology can integrate the advantages of distributed generation and that makes for large scale new energy and renewable energy power generation system connected to the grid. First, the micro grid research background and significance are introduced in detail, then the current research situations of micro-grid at home and abroad are represented, in the end, the key problems and development prospect of micro grid are discussed emphatically.
Luminescent Hybrids of Eu3+ Complexes Covalently Bonded with Mesoporous Silica and PMAA
Authors: Li Ying , Wang Jie Lin , Chain Wei , Wang Xia , Li Hua Ti , Liu Shuang He
Published: August 2013

Binary organic-inorganic mesoporous hybrid materials were prepared by covalntly grafting Lanthanide (III) (Eu) trifluoroacetylaceton (TAA) complexes to the ordered meosoporous silica SBA-15 via hydrothermal method and hydrolysis and co-polycondensation method with the surfactant P123 and TEOS. Besides, Novel ternary lanthanide (III) (Eu) organic-inorganic-polymeric mesoporous hybrid materials have been synthesized as well through the introduction of the organic polymer PMAA to the binary system with covalent bond. We investigated the thermal stability and luminescence properties of hybrids and found that the ternary hybrid materials exhibit better thermal stability and stronger emission intensity. Furthermore, compared with the binary mesoporous material Eu (TAA-SBA-15)3, the ternary mesoporous material Eu (TAA-SBA-15)3PMMA exhibits the characteristic emission of the Eu3+ ion with a higher luminescence Intensity, suggesting that the introduction of polymer PMMA into the mesoporous matrix is of benefit for the sensitization of Eu3+ luminescence, by replacing H2O groups that can quench the luminescence of Eu3+ ion.
Effects of Process Parameters on the Particle Size Distribution of Graphene Oxide Aqueous Dispersion
Authors: Hu Xue Bing , Yu Yun , Zhou Jian Er , Song Li Xin
Published: August 2013

During graphene oxide separation process, the effects of the process parameters such as centrifugal separation time and ultrasonic treatment time on the particle size distribution of graphene oxide aqueous dispersion were studied. The results show graphene oxide has the narrower particle size distribution and the smaller nominal effective particle size with increasing the centrifugal separation time from 20 min to 160 min. And there is a critical time in the ultrasonic treatment to obtain the narrower particle size distribution and smaller nominal effective particle size of graphene oxide. Graphene oxide has the narrower particle size distribution and the smaller nominal effective particle size when the ultrasonic treatment time is 4 h.
Syntheses and Characterization of Chiral Branched-Arm Liquid Crystals-Basing on Isosorbide as Chiral Core
Authors: He Xiao Zhi , Zhang Li Jiao , Li Guang Yu , Tian Mei , Jia Ying Gang
Published: August 2013

A new series of two-arm (MB1, MB2), four-arm (MB3), six-arm (MB4) chiral liquid crystalline compound containing isosorbide as chiral core were first synthesized. Four precursors of branched-arm B1~B4 were obtained at first and then were esterized separately with isosorbide and got four chiral branched-arm liquid crystals (MB1~MB4). The chemical structures and LC properties of the liquid crystalline molecule were measured by spectrum and thermal analysis techniques. XRD curves of MB1~MB4 samples only showed broad peaks at wide-angle, but no sharp peak was seen for all the samples. The results showed that MB1~MB4 appeared cholesteric phase with oily streak texture or lined texture and finger print texture. Isosorbide successfully induced cholesteric phase. The values of melting point and clearing point for MB1~MB4 decreased. The quantity of branched-arm and chiral core had effects on their liquid crystalline properties.
Fast Removal of Cu (II) from Aqueous Solutions by PET Nanofibrous Membrane Modified with Acryamide
Authors: Dong Xiao Cui , Cao Ding , Shi Yan , Fu Zhi Feng
Published: August 2013

A novel nanofibrous membrane was used for removing Cu (II) from aqueous solutions. The poly (ethylene terephthalate) (PET) membranes were fabricated by electrospinning, and then grafted with acrylamide (AM) on the surface. The morphologies of the nanofiber was characterized by SEM, meanwhile, the chemical composition and element analysis on the membrane surface were measured by FT-IR and XPS, respectively. The Cu (II) adsorption experiment investigated the adsorption performance related to the pH value on. Equilibrium studies show that the adsorption process follows Langmuir model and the maximum adsorption capacity was estimated to be 183.25 [mg/g].
Protective Effect of Schisandrin on Hydrogen Peroxide-Induced Damage in PC12 Cells
Authors: Ren Kuang , Wang Yan Chun , Fan Hong Yan
Published: August 2013

In this study, schisandrin was assessed for potential protective effects on pheochromocytoma cell line (PC12 cells). Using PC12 cells damage induced by H2O2(25μmol/L) as in vitro model. After pre-treatment with different concentration of schisandrin (0.3, 0.6, 1.2μM) for 24h, MTT assay was used to detect the cell viability, the supernatant of cells was collected to examine the levels of nitric oxide (NO) in each sample, and immunocytochemical staining was adopted to observe the expression levels of bcl-2. Results showed that schisandrin at different concentrations could increase the viability of PC12 cells and decrease the levels of NO in the culture medium. There were significant differences between schisandrin group and H2O2 group (P<0.05,P<0.01). Immunocytochemical staining result revealed that schisandrin could upregulate bcl-2 protein expression. In summary, schisandrin shown significant neuroprotective effects on H2O2-injured PC12 cells through antioxidant properties and upregulate bcl-2 protein expression, and could be a potential candidate for intervention in neurodegenerative diseases.
Extraction and Antioxidant Property In Vitro of Cordycepin in Artificially Cultivated Cordyceps Militaris
Authors: He Yu Tang , Zhang Xiao Li , Xie Yu Mei , Xu Yong Xia , Li Jian Rong
Published: August 2013

The cordycepin was extracted from cultured cordyceps militaris through enzymatic method. The main factors: ratio of material to liquid, cellulose addition and extraction liquid were selected to carry out single factor experiment. The L9(34) orthogonal experimental design was applied to optimize extraction technology of cordycepin. The results showed that effects of three factors on cordycepin extraction rate reached extremely significant level. The optimum parameters of cordycepin extraction were material-liquid ratio 1:15, enzyme addition 1.5% and ethanol solution 50% under temperature 70°C for 3h. Under these parameters, cordycepin extraction rate reached to 1.48%. The antioxidant property of cordycepin were determined by hydroxyl radical (OH) and DPPH (1,1-diphenyl-2-picryl-hydrazyl) radicals scavenging assays. When cordycepin concentration was 0.8 and 1.8 mg/mL respectively, the scavenging capacity of DPPH and OH could reach to 50%. The antioxidant property of cordycepin was close to vitamin C. This study has important practical significance for deep processing of Cordyceps militaris resources.
Influence of Ti Layer on the Structure and Properties of Al/Cu Thin Film
Authors: Yue An Na , Peng Kun , Zhou Ling Ping , Zhu Jia Jun , Li De Yi
Published: August 2013

Titanium and aluminum films were deposited on oxygen-free copper substrates by electron beam evaporation method to obtain Al/Cu and Al/Ti/Cu layer composites. Evolution of microstructure and properties of Al/Cu and Al/Ti/Cu thin film during heat treatment processes were investigated by XRD, SEM and electrical properties analysis. The introduce of Ti layer can prevent the formation of Cu-Al intermetallic compounds, and has no obvious influence on the electrical resistivity of Al/Cu thin film, which can be used as a pad in microelectronic package and devices.
The Preparation and Property Research on Laponite-Poly (L-Lactide) Composite Film
Authors: Zhou Guo Xian , Yuan Ming Wei , Jiang Lin , Yuan Ming Long , Li Hong Li
Published: August 2013

The laponite-poly (L-lactide) composite films are prepared by the method of solution blending with polylactide (PLA) and laponite. The result shows that the homogeneous and smooth composite film is prepared with 1, 4-dioxane. Thermogravimetry analysis (TG) and tensile strength studies demonstrate that the thermal stability and tensile strength are improved with the laponite added. The scanning electron microscopy (SEM) measurement indicates that the pores of composite films get uniform and network structure is more and more compact with compared to pure PLA film. The present study reveals that the laponite as a complexing agent can improve the mechanical properties and thermal stability of PLA.
Characterizations of Liquid Polycabosilane (LPCS) Used as SiC Matrix Precursor for CLVD Process
Authors: Mei Min , He Xin Bo , Qu Xuan Hui , Hu Hai Feng , Zhang Yu Di
Published: August 2013

Characterizations of a liquid polycarbosilane used as SiC matrix precursor were investigated by TG-DTA, FTIR, XRD, etc, which indicated the feasibility of using LPCS as precursor for CLVD process to prepare C/SiC composites. The results show that the inorganic conversion of LPCS to SiC is almost completed at 900 °C, and the crystallization of β-SiC appears at 855 °C approximately. As the temperature increases, the deposit becomes more pure and the crystallinity of β-SiC also increases. The atomic ratio of C/Si in the deposit attained at 1200 °C is near-stoichiometric, the crystallite size of β-SiC is about 33.4 nm.
Mechanism and Experimental Research on Improvement in Conductive Performances of ZnO Coated Tourmaline Powder
Authors: Zhang Xiao Hui , Wu Rui Hua
Published: August 2013

The heterogeneous conglomeration method, chemical precipitation method and Hydroxy combination theory are adopted in the paper through detailed theoretical analysis and contrast experiments. Tourmaline powder surface is completely covered with ZnO by 1.2:1 mass ratio of ZnO to tourmaline powder. Submicron-nanometer powder is achieved due to 78.71 mean particle diameter, the electrical resistivity of composite powder is decreased to 7.45Ω.cm. Improvement of conductive performance extends the application of tourmaline in the field of environmental purification.
Analysis on Development Status and Trend of Vehicle Materials Your
Authors: Li Yan Ze , Ding Zhi Hua
Published: August 2013

Vehicle engineering materials are used in manufacturing of vehicle. Its status quo and development trend are analyzed. Proportion of steel in structure material will reduce stage by stage. With reliable performance, steel will be replaced by light and new-style materials such as aluminous alloy, compound materials. Plentiful developing rapidly new materials, such as macromolecule materials, compound materials, offer necessary condition to develop vehicle.
Effect of Al on Zn-Al Filler Metal Wettability on Pure Aluminum Surface
Authors: Zhang Man , Lin Yue Bin , Jiang Hai Lin
Published: August 2013

Zn-Al filler metal wettability tests were performed on pure aluminum surface. The test results show the spreading area of Zn-Al filler metal gets large on pure aluminum surface gradually with the increase of Al content in Zn-Al filler metal under the match of CsF-AlF3 flux. When Al content in the Zn-Al filler metal is 15 wt.%, the spreading area of 85Zn-15Al filler metal is biggest on pure aluminum surface. Accordingly, the dendritic eutectoid structure size is smaller near the interface between the Zn-Al filler metal and the pure aluminum base metal by metallographic analysis. When Al content in the Zn-Al filler metal exceeds 15wt.%, the spreading area of filler metal begins to become small. At the same time, the eutectoid structure presents circle shape near the interface between the Zn-Al filler metal and the pure aluminum base metal.
RE-Boronizing below Beta Transus Temperature on TC4 Titanium Alloy Surface
Authors: Li Jin Sheng , Li Feng Hua , Lei Li , Yi Xiao Hong , Fan Zhan Guo , Gong Dian Yao
Published: August 2013

Ti6Al4V (TC4) slices were boronized with rare earth oxide (RE) addition in the agent at 950°C (below β phase transus of TC4). The morphology, phases, properties and structures of TC4 matrix and boride layers were studied. The results show that the boride layer on the surface of TC4 consists of TiB2 and TiB dual compounds. The boride layer is compact, uniform and less porous compared with that obtained at 1050°C (above β phase transus of TC4), and the hardness profile and brittleness of the layers are improved to a certain extent. Lower temperature boronizing can effectively prevent the growth of coarse β phase grains. Duplex microstructure is obtained in TC4 matrix, and the work piece distortion is reduced.
Effects of Solution and Cryogenic Treatments on Microstructures and Mechanical Properties of AZ31 Alloy Tubes
Authors: Yu Bao Yi , Luo Qian Qian , Li Yang , Wu Yu Juan , Li Run Xia
Published: August 2013

In order to improve plastic property of AZ31 alloy tubes at room temperature and expand application of cold rolling process in magnesium (Mg) alloys, solution treatment (T4) and cryogenic treatment of AZ31 tubes obtained by drawing were investigated in this work. The results indicate that T4 can improve the microstructure of the alloy, refine grains and eliminate twins. The optimized T4 parameter is 300 °C for 8 h, in which the average grain size of 12 μm can be obtained and elongation reaches to Max of 16.1% and tensile strength reaches to 242 MPa. Moreover, tensile strength was decreased to 211 MPa, while, elongation was improved to 25.4% by T4+cryogenic treatment at-196 °C.
Bearing Friction Vs. Chain Friction for Chain Drives
Authors: Todi-Eftimie Alina , Velicu Radu , Saulescu Radu , Jaliu Codruta
Published: August 2013

This paper studies experimental methods to measure friction, which determines the wear of chain elements in relative motion from a chain transmission, used in camshaft drives for an internal combustion engine. The paper presents a critical analysis of a constructive solution realized to determine the friction torque in parallel axes transmission bearings.
Delamination Buckling of Piezoelectric Laminated Cylindrical Shell under Axial Compression
Authors: Yang Jin Hua , Chen De Liang , Peng Xu Long
Published: August 2013

The buckling of the piezoelectric laminated cylindrical shell with throughout circumference delamination is analyzed in this paper. By introducing the Heaviside step function into assumed displacement components and using elastic piezoelectric theory, the constitutive relations of the piezoelectric laminated shell with delamination are established. Then the buckling governing equations of the structure are derived through variational principle. In numerical examples, the effects of delamination length, depth, material property and thickness of piezoelectric layer on the buckling load of piezoelectric laminated shell with delamination are investigated.
Green Manufacturing Technology of Manufacturing Industry Sustainable Development
Authors: Wang An , Zhang Xiang Qing
Published: August 2013

Green manufacturing is the only way to realize manufacturing industry sustainable development. This paper discusses the definition and the key technologies of green manufacturing, analyzes the relation of green manufacturing and manufacturing industry sustainable development, and puts forwards strategies of developing green manufacturing.
Fabrication of Micro Patterned Substrate by Powder Injection Molding
Authors: Lee Hyeong Jae , Jang Jin Man , Lee Jin Hyung , Kim Yong In , Park Sung Chan , Ko Se Hyun , Lee Won Sik
Published: August 2013

In this study, a micro patterned substrate was manufactured by micro powder injection molding (μPIM). As a mold for forming the micro patterned substrate, a metal mold having a linewidth of 100 um was fabricated by micro photo etching process. The specimen prepared through such a process had a sound shape at a shrinkage rate of 16.7% with respect to the mold. To verify industrial applicability of the micro patterned substrate, a micro-fluidic device was fabricated using a smooth flow of fluid therethrough. These results indicated that the micro powder injection molding is useful for micro-fluidics.
Design and Analysis of Water Turbine that Used for Wave Energy Power Generation
Authors: Wang Shi Ming , Wang Ya Nan , Tian Ka
Published: August 2013

In view of the current global energy shortage crisis, ocean wave energy is development potential renewable energy, which is gaining more and more attention. This paper put forward use the water turbine absorb wave energy, and then generate electricity. It focus on the compose and generate mechanism of water turbine, and design structure of water turbine, and combine ocean wave theory and the flow control equation to analysis, through the method of machine design and FLUENT simulation, finally proved the water turbine had a high efficiency and has good application prospect.
Research on Application of Advanced Ceramics in Machine Tool Spindles
Authors: Li Song Hua , Feng Ming Hao , Li Xue , Wu Yu Hou , Jin Xiao Lin
Published: August 2013

One important demand on spindle systems in modern machine tools is to realize higher rotational speed in order to increase the machining efficiency. So, the low rotational inertia and high fundamental natural frequency are indispensable. Because of advanced ceramics' extraordinary physical properties such as high hardness, low thermal expansion, light weight, abrasion resistant and good chemical and thermal stability, it accommodates very well the high-speed and precision requirements of machine tool spindles. In this study, a high-speed ceramic spindle system equipped with high-performance structural ceramic shaft and fully-ceramic ball bearings was designed and developed. The high-speed ceramic motorized spindle prototype was assembled with high precision successfully, and its performance test and analysis were finished. The test results show that ceramic motorized spindle can reduce the high-speed rotational centrifugal force and inertia force and increase the stiffness and rotation accuracy of spindle-bearing system greatly.
Application of Kansei Engineering in Product Form Design
Authors: Lv Zhong Yi
Published: August 2013

According to the analysis of improved life quality which led to the rise of product form aesthetic level, discussed the significance of the common, guiding, professional product form creative design technology research and development on promoting the shape design. Based on Kansei Engineering methods, discussed how to improve the efficiency and accuracy of product positioning and product form design. Portable sewing machine design was taken as an example to prove this method.
Decision Making on Engineering Materials Based on Relative Grey Relation Analysis
Authors: Wang Dong Jing , Peng An Hua
Published: August 2013

The quality and cost of a product rely heavily on selecting suitable engineering materials, and therefore the ability to select the most appropriate material for a given application is the fundamental challenges faced by the design engineer. The general grey relational analysis (GRA) has three weaknesses: (1) weight determination depends only on expert judgments; (2) the qualitative indexes are only simply quantified with exact number; and (3) the general GRA only takes into account the relationship between the imaginarily best material and the candidate materials. The GRA is extended to RGRA, weights are determined by combining subjective and objective weights based on maximum deviation, and the qualitative indexes are fuzzily quantified through trapezoidal fuzzy number (TFN). The illustrative example shows that the presented method enables decision making results to be more reasonable and trustworthy.
Driver Seat Lumbar Support Adjustments System Design Based on Ergonomics Principles
Authors: Lin Ting Ting , Zhang Xiao Yi , Sang Chun Lei , Ren Jin Dong , Zhang Pei Zhi , Zhang Wei , Shan Qi
Published: August 2013

As a typical man-machine interface, vehicle driver seat directly affects driver seating and riding comfort. Lumbar support of driver seat plays a particularly important role in improving driver seating and riding comfort and is usually realized by installing adjustable lumbar support, which provides stable, comfortable support for drivers with different body sizes. Traditional lumbar support has several shortcomings, such as complex structure, high cost, insufficient adjustments ranges, etc. In this work, forward design method of lumbar support with adequate design confidence level was developed, with four-way electric adjustments system. Firstly, lumbar support adjustments ranges was analyzed according to ergonomic principles. Then the concept of lumbar support adjustments mechanism was designed and the parameters of adjustments mechanism were determined including the length and angle ranges of parts, motor and spring parameters, etc. Finally, with consideration of product processing technology and manufacturing cost requirements, detailed lumbar support adjustments system structure was determined. The validated system structure parts were produced and assembled into a prototype. The prototype was tested and accepted, which showed that not only the lumbar support system met the design requirements well, but also the forward design method presented was scientific and reasonable.
Sense of Sculpture in the Form Design of Product
Authors: Chang Rui Fen
Published: August 2013

In numerous products design, Consumers pay more and more attention to the aesthetic experience of product form. Aesthetic is inseparable from form, and sculpture is a kind of pure solid form, so how to create the product form with sense of sculpture? Product innovation is the trend of product design, only if learn from natural formhighlight key pointsreflect personality, which can make product form keep going to the new period of design innovation.
Digital Modeling and Movement Resolution of Rubber Ballon Analogy for 3D Packing Problem
Authors: Ma Jun Yan , Long Feng Ying , Liao Xiao Ping , Chen Biao , Lu Juan , Xia Wei , Yu Xiao Mo
Published: August 2013

Packing problem is how to arrange the components in available spaces to make the layout compact. This paper adopts a digital modeling algorithm to establish a novel rubber ballon convex hull model to solve this problem. A visible point puls maximum distance method analogy QuickHull algorithm is presented to get extreme points of rubber ballon convex hull. Movement resolution aim at force analyze and calculate the resultant vector to translate, rotate and slide the component to make the volume decrease in detail. An experiment proved this digital modeling algorithm effective.
Study and Analysis on the Thermal Simulation of the Pressing Rollers in the Forming Process of Radial
Authors: Tang Yue , Jiang Feng
Published: August 2013

By comparative research and analysis of radial tire building machine with pressure-process of hot roll in 3 different heating programme of the pressure roller;Combined with thermal analysis in the Pro/MECHANICA module, Rollers by means of finite element analysis method for the model, boundary conditions and physical properties determination; Eventually through the establishment of the steady-state distribution of research, using different heating programme, through the analysis of optimal heating programme.
Research on the Effect of Load on the Fatigue Tearing of the Elastic Element
Authors: Yan Zheng Tao , Liu Wen Wu , Li Hai Feng
Published: August 2013

According to engineering implement, the elastic element of the rubber isolator is easy prone to fatigue tearing, the model of the pump group floating raft vibration isolation system is established by ADAMS and the finite element ANSYS software, the force distribution of the system is calculated in the different swing angles in ADAMS, and the main reason of the elastic element fatigue tearing is found. Then, the strain change rule of the elastic element is researched in ANSYS, the elastic element which is the most vulnerable to fatigue tearing and its crack location are found, which plays an important role in solving the fatigue tearing of the rubber elastic element in the engineering practice.
The Design of Liner Replacement Manipulator for Ball Mill and Finite Element Analysis of the Main Girder
Authors: Huang Qiu Bo , Shui Lei
Published: August 2013

In this paper, we have a development and research combined with the liner replacement manipulator of a company. First, drawing each part of the main girder on ANSYS and assembling them virtually. Next, using the static analysis module of ANSYS to have an integral finite element analysis for main girder. The stress and deformation cloud chart is achieved through this analysis, and the overall performance meets the demand of the design requirements. The analysis result provides the design and improvement of the manipulator with theory basis.
Effect of the Fiber Length of Optoelectronic Oscillator on Sensitivity of Distance Measurement
Authors: Zhang Tao , Zhu Ji Gui , Ye Sheng Hua
Published: August 2013

The ultra-long optical fiber of optoelectronic oscillator (OEO) and the high spectral purity of the high frequency microwave signal open the possibility of high-accuracy distance measurement at long range. Sensitivity of distance measurement is highly depending on the length of the cavity. Base on the theory of optoelectronic oscillator and the distance measurement method, the sensitivity is calculated and the demand for spectral-purity of microwave signal are proposed and verified by experiments. Consider the demands of the measurement sensitivity, the spectral purity and the measurement range, as well as the error introduced by environment, the fiber length of OEO would be about 1km when the resolution of frequency measurement is 1Hz.
Signal Acquisition and Process on Tower Crane Safety Control System
Authors: Wang Jin Yu , Fu Guang Jie , Lin Dong Xue , Wang Chao
Published: August 2013

Tower crane collapse accidents occur frequently, personal injury or death became a common occurrence. According to the nationalGB12602-2011 lifting mechanical overload protection device security technical specifications, security and monitoring equipment must be installed on the tower crane. The GPRS and U disk storage tower crane control system has catered to the national security specified requirements, record and inquires can be realized, at the same time, the control system can achieve data wireless remote. Supervising person that in the units can monitor the construction site online. Meanwhile, the system can control the tower crane operations according to the specific situation of overrun.
Design of Monitor and Control System of Screw Pump Oil Production Based on ATT7022
Authors: Xiong Chun Yu , Qi Feng He , Guo Zong Guang , Xia Yun Bo
Published: August 2013

Design a working condition monitoring and intelligent diagnosis system for screw pump based on the ATT7022 chip. Achieve real-time acquisition, storage, analysis of the driving motor electrical parameters of three-phase voltage, current, frequency, active and inactive power, power factor, and the fluid parameters of screw pump production well pressure, pressure, temperature. Accomplish monitoring, alarm and automatic protection the screw pump failure of rod breaking, pump sticking, vacuum, lack of power phase. Using PIC microprocessor to automatic compensate the screw pump motor power, to improve the work efficiency.
Analysis and Design of On-Line Monitoring and Fault Prewarning System for Mine Ventilator
Authors: Xie Shi Man , Xuan Zhao Yan , Li Zong Yan , Feng Hong Mei , Yang Fei
Published: August 2013

According to the present state that traditional regular repair methods are always adopted for mining equipment maintenance, this paper puts forward a method of installing various sensors on the equipment which are combined with computer and signal analysis technology so as to realize on-line monitoring, fault prewarning, and remote release. This paper analyses the common faults of mine ventilator and their characteristics, selects the vibration sensor and its mounting points based on the characteristics of the fault signal, selects the signal acquisition cards based on equipment operating conditions and analysis parameters accuracy, builds up the hardware and software platform, completes the design of system function module and data flow, and achieves modularization programming for the whole software system by combining labVIEW and database. This system realizes the condition-based equipment maintenance so that informatization and automation can be achieved in equipment management.
A De-Interlacing Method for Video Surveillance in Intelligent Substation
Authors: Huang Rong , Zhu Hui Qing , Wang Chong
Published: August 2013

A de-interlacing method for video surveillance in intelligent substation is presented in this paper. Firstly, a framework for performance evaluation is proposed so that the subjective performance of de-interlacing will not matter in applications such as video compression. Then pre-filtering is performed to remove potential noise, and a hierarchical structure is introduced for same-parity field pictures or opposite-parity field pictures to get more reliable optical flow results for compression. Finally the optical flow results are used to improve the accuracy of block-based methods for each partition of the to-be-interpolated image and the final motion vectors are determined. Experimental results show that the proposed solution can achieve both better peak signal-to-noise ratio (PSNR) performance and visual effects.
Simulation and Research on Safety Testing of Driving Artillery
Authors: Chen Xue Jun , Xiang Fei Fei , Xie Shi Fu , Lou Hong Wei
Published: August 2013

As it is dangerous to implement a physical test for studying the influence of internal supporter tire to the performance of artillery towing, we carried out virtual experiments to study its dynamic behavior based on PRO/E. Based on the force analysis of tire structure, the calculation of forces are specified. We constructed the finite element model of tire and achieved its diagram of stress distribution in the later simulation. With the software Recurdyn, we analyzed the marching behavior of internal supporter tire at different speeds, and compared with that of conventional pneumatic tire. The experiment result shows that as the internal supporter tire has a reasonable structure, its stress is well-distributed. The sidepartial acceleration can be apparently affected by speed. The internal supporter tire has a better performance than conventional pneumatic tire. Our study lays a theoretical foundation for the application of the internal supporter tire.
Study of Matrix Multipliers for Normalized Frame Multi-Wavelets and Applications in Engineering Material Technology
Authors: Xu Yong Fan
Published: August 2013

Frame theory has been the focus of active research for twenty years, both in theory and applications. Matrix Fourier multipliers send every orthonoamal wavelet to an orthonoamal wavelet. In this work, the notion of the bivariate generalized multiresolution structure (BGMS) of subspace is proposed. The characteristics of bivariate affine pseudoframes for subspaces is investigated. The construction of a GMS of Paley-Wiener subspace of is studied. The pyramid decomposition scheme is obtained based on such a GMS and a sufficient condition for its existence is provided. A constructive method for affine frames of based on a BGMS is established.
Analysis about Crafts and Technologies of Low-PIM and PIM Interference Testing System
Authors: Yang Bao Guo , Wang Zun Feng , Li Ming Tai
Published: August 2013

Main low-PIM crafts were summarized, such as material requirements of major devices and special requirements of electroplating process. The setting up technologies of a PIMI testing system was discussed, for example reducing the number of connectors, isolators being used to prevent active IM and requirements of subsystem and receiver being given. Based on those crafts and technologies, a PIMI testing system was setting up with a design goal of 3rd residual PIM being-165dBc@2x43dBm. It achieved the goal with-165dBc through actual measuring after calibration.
Data Fusion Method for Online Detection Based on Contour of Parts
Authors: Gong Yu , Zhang Jing Cai , Liu Hong Qi
Published: August 2013

In this article, a method of data fusion based on contour of parts is proposed for multi-factors measurement. Contour of the parts is used as a reference to fusing data because it is more sensitive to the angular changes than other parts and the relative positions between the contour and other individual part are fixed. This method not only is a reference to fuse data from multi-sensors, but also could apply feedback control for the measurement system. A key part of automotive transmission named splined hub has been used in the verification experiment in which the principle and structure of the measurement system is introduced.
Structural Damage Diagnosis Using an Improved Eigenvalue Perturbation Method
Authors: Li Jian Heng , Yang Qiu Wei , Shen Xue , Liang Chao Feng
Published: August 2013

This paper presents an improved method to identify structural damages only by changes of natural frequencies. The underlying principle of the proposed technique is to measure the natural frequencies of the damaged system, and then use this set of data as well as the original test data of undamaged system to identify structural damages with the help of eigenvalue perturbation method. In this contribution, a simple accelerated formula is developed to improve the accuracy of the eigenvalue perturbation method. With the introduction of the accelerated formula, the proposed method is able to achieve more accurate results than that obtained by the original eigenvalue perturbation method without any high-order analysis or multi-iterations. The effectiveness of the proposed method is illustrated using simulated data on a published numerical example. From the numerical results, it can be conclued that the proposed approach is simple to implement and can identify structural damages very accurately only by the first few natural frequencies.
Damage Identification of Structure Based on RBF Neural Network
Authors: Zhen Cheng Gang , Chong Xiang Ting
Published: August 2013

Health monitoring of the structure is a topic widely concerned and researched in the fields of technology and engineering at home and abroad. Damage identification of structure is an important aspect of the whole health monitoring system. In this paper, the RBF neural network with the effect of bionic is used to the extent, location and area recognition of the damage on the structure with single damage. The method of orthogonal least squares (OLS) is used as the learning method of the network. The test results show that the RBF neural network and the learning method of OLS can identify the damage status of the structure quickly and effectively with high accuracy.
Flow Simulation and Optimization of the Car Bumper Beam by VARTM Process
Authors: Du Rui Kui , Wang Fang Fang , Chen Xian Hui , Zhang Yan Fei , Zhao Gui Zhe , Liu Ya Qing
Published: August 2013

Polymer based composites are widely used in the automobile body panels instead of the steel sheet, due to the requirement of reducing automobile weight. Natural fiber composites were proposed to be used for the car bumper beam. In this paper, the mold filling process of the car bumper beam model for VARTM process was simulated by the software of the RTM-worx. The optimization injection scheme was determined based on the simulation results of the different schemes. It was found that the multiple injection ports would reduce the filling times, and the scheme 6 was the best one for the injection. The filling times of the optimization scheme 6 was 742 s, and two vents at the position A and B would expel the bubbles at the intersectional regions of the resin. Moreover, the optimization scheme could be directly used in the practical production.
Test Research on HIMS-Reverse Flotation of Oolitic Hematite of Longyan Iron Mine
Authors: Liu Shu Xian , Zhang Jin Xia , Chen Miao , Xu Zhi Shuai
Published: August 2013

In order to better exploit and utilize the oolitic hematite ore resource in Zhangjiakou region, staged grinding-separation process consisting of high intensity magnetic separation(HIMS) and reverse floatation was adopted in the beneficiation test on the regionally representative oolitic hematite ore of Longyan Iron Mine, Xuan Stee1. The test results indicate that，with Slong pulsating high gradient magnetic separation as HIMS equipment，with NaOH，starch，CaO and TS as flotation reagents，and at a grind of 65％ -200 mesh for the primary grinding and 95％-200 mesh for the secondary grinding，an iron concentrate grading 62.34％ and having an iron recovery of 53.07％ can be achieved after two stage HIMS and one roughing—one cleaning reverse flotation.
Investigation on Zener-Hollomon Parameter in the Hot Compressive Deformation Behavior of SWRCH 35K
Authors: Tian Peng , Zhong Zhi Yong , Hui Wei Jun , Bai Rui Guo , Zhang Xing Li , Guo Fu Xing , Gao Hai
Published: August 2013

The hot compressive deformation behavior of SWRCH 35K was studied with uniaxial hot compression simulation tests at 923 ~ 1223 K and strain rate of 0.01 ~ 20 /s. The results show that the hot compressive deformation activation energy was 408 kJ/mol and the rang of deformation stored energy was 10 ~ 50 J/mol. The quadratic fitting expression between deformation stored energy and Zener-Hollomon parameter (Z) was established and the deformation stored energy was considered to increased with increasing Z or with lower deformation temperature and increasing deformation rate.
Double Second-Order ESD Circuit Model and its Simulation
Authors: Wang Jin Shan
Published: August 2013

According to the International Electrotechnical Commission issued IEC61000-4-2 testing standards, through the electrostatic discharge current waveform characteristics analysis and numerical experiment method, using exponential pulse signal and the damped sinusoidal signal to construct a new the ESD current expression. Using Laplace transform, established the ESD system mathematical model. According to the mathematical model, construct double second-order circuit model of the ESD system, and the simulation is carried out. The simulation results meet the IEC61000-4-2 standard, and verify the consistency of the ESD current expression, the mathematical model and the circuit model.
Reactive Power Optimization in Distribution Network with PV Station Based on Intelligence Algorithm
Authors: Ren Xin Wei , Xu Jian Zheng
Published: August 2013

Reactive power problem of PV station in distribution power system is discussed. Probability theory is introduced to calculate the expectation of active power, which is approximately used to replace the randomly changing output. Reactive output can be adjusted by changing some related parameters of the grid-connected PV system. Considering reactive power of PV station as control variables, a model with voltage level constraints of minimizing the active power loss is established and its optimal solution is figured out with IBCC (Improved Bacterial Colony Chemotaxis). Case calculation results show the validity of above-mentioned model and algorithm.
Convolutive Blind Source Separation Applied to the Wireless Communication
Authors: Xu Peng Fei , Jia Yin Jie
Published: August 2013

Based on the fact that there is a good amplitude correlation between neighbour bins of a communication signal, we presented a new blind source separation method applied to the wireless communication. Since there is no complicated mathematic derivation in this method, it is relatively simple in theory. Furthermore, wavelet de-noising processing is proposed finally. It yields good results in the experiment and improves the performance of BSS system applied to the wireless communication. In addition, this method is robust and time saving.
A Study about Optimal Design for Preform Injection Mold for 3-Stage Injection Blowing System Using Finite Element Method
Authors: Seo Tae Il , Song Byeong Uk , Lim Yong Seok
Published: August 2013

This paper presents a series of injection process simulations for blow molding preforms by using MoldFlow. The injection-blowing system was used and this consists 3 stages on the same machine; (1) preform injection, (2) blowing and (3) ejection. The quality of preform injection process is an important factor that can dominate the whole process efficiency. The injection mold system consists of 10 cavities and a hot runner system. The hot runner system has 10 cavities and temperature of each cavity can be independently controlled. Through several filling analyses, suitable temperature of each gate was determined so that all cavities could be simultaneously filled. Weld lines on the bottom of preforms were predicted. This fact can be an important aspect because preforms will be blown. To improve cooling efficiency, ''Floody Cooling Type" channels were applied. Conventional cooling channels were straight-line types and then distances between cooling channels and cavities cannot be uniformed. Floody cooling type channels were uniformly placed around cavities as far as possible. To compare two different types of cooling channels, cooling tests of MoldFlow were carried out and certain advantages of floody cooling type channels were evaluated.
Recent Development of Focused Ion Beam System and Application
Authors: Chen Yan , An Li Bao , Yang Xiao Xia
Published: August 2013

Ultra-precision machining is used for many engineering applications where the traditional processes fail to work. Focused ion beam (FIB) technology is a very important part of the ultra-precision machining. It can realize the precise positioning, microscopic observation and micro machining. This paper introduces the FIB system and its application. FIB system contains ion source, focusing and scanning equipment and sample station. FIB technique has many unique and important functions. It is widely used in semiconductor device fabrication and circuit failure analysis. It can realize sample etching, imaging, thin film deposited, ion implantation and micromachining.
Research on the Control of Aircraft Energy System Based on Flywheel Battery
Authors: Sun Xiao Jing , Wang Xing Gui , Wang Dao Ming
Published: August 2013

The flywheel battery can replace the chemical battery of aircraft energy system completely or partly,and can improve the supply ability,service life and reliability of vehicle energy system.The flywheel battery charging/ discharging control model circuit in the d-and q-axes has been established through the analysis of the permanent magnet synchronous motor and the PWM converter mathematical model and the use of the gyrator principle. And the control strategy of the flywheel battery charging/ discharging magnetic field oriented vector has been studied based on the model.The simulation and experimental results show that the control performance of the flywheel battery using the control strategy is good,and can meet the requirements of the aircraft energy system.
Fabrication and Precision Electromachining Technology of ZrB2-SiC Ceramic Composites
Authors: Han Wen Bo , Zhang Ji Hong , Yang Hong Qing , Ding Guo Zhi
Published: August 2013

ZrB2-SiC ceramic composites with the addition of carbon black were fabricated by hot pressed sintering at 1900 °C for 60 min at a uniaxial pressure of 30 MPa in an argon atmosphere. The mechanical properties of ZrB2-SiC ceramic composites were improved, adapting to the use requirements of ceramic parts. The precision electromachining technology of complicated structure components was investigated. The processing surface roughness was evaluated.
Performance Analysis of Refrigerants R1234yf Two Stage Compression Cycle with a Throttle Valve and an Expander
Authors: Wang Hong Li , Jia Ning , Tang Qi Long , Zhang Qing Hua
Published: August 2013

With increasing of high pressure or condenser temperature, the cycle (TSCV+TG) has a downward trend and the cycle (TSCE+TG) has an increasing trend. With increasing of the evaporating temperature, the cycle (TSCV+TG) has an increasing trend and the cycle (TSCE+TG) has a downward trend.