bluuebunny/crossref_metadata_2025 huggingface dataset:
Speed Effects on Inherent Rotating Frequency of Motorized Spindle System
Authors: Wang Bo , Sun Wei , Xu Kun Peng , Wen Bang Сhuan
Published: January 2012

The paper determines the impact factors of high-speed spindle system including the centrifugal force, gyroscopic moments and the bearing stiffness softening, etc, then builds the general spindle-bearing FEM considering high speeds. Taking a motorized spindle as example, the effect of centrifugal force, gyroscopic effect, the radial stiffness and the coupling factors are analyzed qualitatively and quantitatively. Finally the research shows the variations of bearing radial stiffness, centrifugal force and gyroscopic moments have a significant effect on dynamics of spindle system in high speeds, while modeling the high speed spindle system, above factors must be considered.
Effect of Hydrogen on Mechanical Properties of Pipeline API 5L X70 Steel
Authors: Bellahcene T. , Capelle J. , Aberkane Méziane , Azari Z.
Published: January 2012

The aim of this work is to study the effects of hydrogen absorption on mechanical properties of pipe API 5L X70 steel. This study is conducted in special soil solution NS4 with pH 6.7 It show that the tensile properties like yield stress, ultimate strength and elongation at failure reduced under hydrogen embrittlement. Several fatigue tests (three (03) points bending tests) on roman tile specimens with notch are performed. Fatigue initiation is detected by acoustic emission. A comparison between specimens electrolytically charged with hydrogen and specimens without hydrogen absorption is made and it has been noted that fatigue initiation time is reduced when hydrogen embrittlement occurs. The field of elastoplastic stresses near the notch is computed by the finite-element method with the Abaqus software package. Effective distance and stress are calculated with the volumetric approach and the Notch intensity Factor of the roman tile specimen is determined for each loading value used in our tests.
The Finite Element Analysis on Mechanical Properties of the Meridians Stair Skeleton of Medical Exhibition Center in Taizhou City
Authors: Xue Jia Zhu , Chi Yv Zhang , Zhi Xiang Cao
Published: January 2012

The alien space meridians stair steel structure is first adopted in Taizhou medical city exhibition center project. Based on the finite element calculation method for curved beam element stiffness matrix, convergence standard controls and iteration method of solving the modification and optimization in this paper, the complex alien space meridians framed calculation model is built, and the distribution of axial force and bending moment distribution of the stairs meridians skeleton structure are calculated, and the position and numbers are determined. Numerical results show that the maximum space alien meridians stair axial force is 34.5 KN and maximum bending moment is 5.9 KN•m, which satisfy the standard requirement, then the size curvature big, mechanical transmission line complex and local internal force big technology problem skeleton structure have been solved .Therefore, a strong engineering application value achieves in this paper.
Workability Characteristics of Porous Concrete in Pavement Applications
Authors: Elguemri Noureddine , Fan Ying Fang
Published: January 2012

Porous concrete dramatically reduces environmental degradation and the negative effects associated with urban sprawl. Porous concrete has been used as an effective method for treating and reducing negative environmental impacts. This paper provides a clear indication of the workability and fresh concrete characteristics in pavement applications. The performance of porous concrete was compared with a concrete sample that is comparable to the material used for the construction of conventional concrete road pavements. The analysis includes the porous concrete mix preparation procedure and the workability tests. The workability tests include the slump, VEBE and compacting factor tests.
Root Biomass Characteristics of Paronychia Kurdica Boiss for Using in Soil Protection in Shanjan Rangelands, East Azerbaijan, Iran
Authors: Bibalani Ghassem Habibi , Joudi Leila , Shadkami Hamideh
Published: January 2012

Roots of plants stable soils on slope and provide resistance against the forces that improve slope instability. In NW of Iran (East Azerbaijan Province), rangelands was Utilized with animal grazing and changed to agricultural land use; this vegetation is unsuitable vegetation on slope to stable them. We studied Paronychia kurdica Boiss to determine its root biomass characteristics. Data were collected with accidental sampling method (1*1 m) with 10-cm-diameter core in this aria. Minimum, maximum and mean root biomass of this plant is 9.37, 15.70 and 13 gr, respectively.
Seismic Performance Assessment of an Existing Road Bridge Using Standard Pushover Analysis
Authors: Roseenid Teresa A. , Premavathi N. , Umarani Gunasekaran
Published: January 2012

The inelastic seismic response of an existing multi-span concrete bridge is investigated by performing nonlinear static pushover analysis. The bridge is subjected to lateral forces distributed proportionally over the span of the bridge in accordance with the product of mass and mode shape. The bridge is pushed up to the target displacement and the hinge formations of the bridge in different steps of the pushover procedure in the transverse direction are obtained. The expected capacity of the bridge is evaluated and compared with the displacement demand.
Strength Properties of Recycled Aggregate Concrete Mixed with Polypropylene Fiber
Authors: Hong Seong Uk , Lee Yong Taeg , Kim Seung Hun , Baek Sang Ki , Cho Young Sang
Published: January 2012

This research is to verify and propose the practical use of recycled aggregate concrete which is one of the recycling methods of construction wastes. This is because domestic construction industries have been more sustainably developed, and renovation and redevelopment of buildings for increasing the quality of life have been actively performed because the necessity of efficient management of construction wastes has been increased. In addition, the possibility of increased quality focused on recycled aggregate concrete with mixed polypropylene fiber was proposed on this research through material experiments basedon compressive and split tension strength.
Application and Comparsion of Mathematical and Physical Models on Inspecting Slab of Stilling Basin Floor under Static and Dynamic Forces
Authors: Mohammadzadeh Behzad , Bina Mahmoud , Hasounizadeh Hooshang
Published: January 2012

To protect downstream of hydraulic structures against erosion and degradation, must dipress water energy. one of the most comon methods to achive this purpose is constructing the stilling basin at the downstream of such structures. In stilling basin, the water energy dissipated by taking place of hydraulic jump. When a hydraulic jump occurs, the hydrodynamic and hydrostatic forces effect on the stilling basin floor slab. These forces include the force due to water weight and the up lift force affected the slab below which these forces are classified in hydrostatic. also the other force is hydrodynamic force due to pressure fluctions below the hydraulic jump. To keep the stilling basin stabillity from liffting up and destruction must the resistant forces be equal to destroyer forces. In this study after discution about the hydraulic jump and its resultant forces, a equation has been offerd to determine the thickness of stilling basin floor slab using buckingham theory andsoftware DATAFIT. Finaly the slab which evaluated by physical model, simulated using mathematical model(software ANSYS 10) and studied. The stress and strain diagrams were extracted. Results showed that physical and mathematical models were matched very good.
Mechanical Properties of Concrete Added with Chicken Rachis as Reinforcement
Authors: Wahab Ezahtul Shahreen Ab , Osmi Siti Fatimah Che
Published: January 2012

This investigation was carried out to look the possibility of using chicken rachis as reinforcement in concrete mix. In this study, two different percentage of rachis from chicken feather were added to plain concrete comprises of 1% and 2% from the total weight of cement. Concrete with grade 30 were formed by using chicken rachis as additive material. Selected mechanical test were performed and the results were analysed. The mechanical tests included compressive strength, and splitting tensile strength. Comparison was made of these values and those of control specimen (without chicken rachis). The results showed an increment on strength for all mechanical tests done using concrete added with 1% chicken rachis compared to 2% chicken rachis added and those control specimens.
Comparative Analysis of Axially Loaded Composite Columns
Authors: Almadini Moftah , Kovacevic Dusan , Radonjanin Vlastimir
Published: January 2012

Experiments on square and circular steel columns filled with light-weight concrete and high strength concrete have been conducted to investigate the contribution of these types of concrete to load bearing capacity of short composite columns. The aim of this research was to determine the effect of two types of concrete filling on behaviour of the composite columns. Thirteen specimens were divided in two groups: steel tubes filled with different type of concrete, with or without reinforcement and RC columns with same dimensions and shape, made of same type of concrete. Comparison was made between load bearing capacity of the steel tubes filled with light-weight concrete, and high strength concrete (with and without reinforcement). All specimens were tested by axial compression until to the failure state realization. Factors which influence the behavior and failure mode, ultimate strength, deflections and stress-strain relation were discussed.
Punch Force Analysis in the Forming of "U" Clamps by Using Combination Die
Authors: Kumar C.N. Ashok
Published: January 2012

Punch force is an important factor in the sheet metal forming operations. The amount of force is mainly based on the material type, shape, size etc. The analysis on theoretical Vs actual forces is playing an important role in the optimization of the sheet metal forming processes. The total press tonnage will be based on the punch forces. Also the type of the die is a key factor in the actual force. In this study, the combination die is designed and fabricated to manufacture the U clamps. The die is used to form the U clamps by using mild steel and aluminum sheets. The punch forces are analyzed in various aspects.
An Improved BM Pattern Matching Algorithm in Intrusion Detection System
Authors: Yin Chao
Published: January 2012

An improved BM-algorithm in intrusion detection system was presented which can increase displacements using the next character of the substring has been matched in the main string and pattern string. Experimental results obtained by capturing network packets with the number of matches, the number of pattern moves, the number of character comparisons as the main indicators. Experimental results show that the number of matches after and before improved is equal, and the number of pattern moves decreased by about13.3% after improved, and the number of character comparisons decreased by about 15.1% after improved. This indicates that the improved algorithm improved the efficiency of pattern matching.
Reflowed Aqua Ammonia Explosion Pretreatment for Corn Stover
Authors: Li Bing , Zhang Chao , Pang Feng , Kang Yong
Published: January 2012

Abstract: Based on ammonia recycled percolation (ARP) and combined with the advantage of ammonia fiber explosion (AFEX), a set of reflowed aqua ammonia explosion pretreatment (RAAEP) equipment was developed. According to the previous orthogonal experiment experimental results, the optimal pretreatment conditions were at 90°C, 9 min retention time, water to dry corn stover loading of 0.8:1(w/w), and aqua ammonia flow rate is 1.5L/min. The cellulose content of the pretreated corn stover was 50.46 % and the glucan and xylan enzymatic digestibility was 86.45 % and 95.77% respectively. The reflowed aqua ammonia not only caused fiber swelling and an efficient delignification (up to 62.5%) of biomass, but also altered the cellulose crystalline structure. The SEM picture and FTIR spectra confirmed swelling and significant delignification effects of the RAAEP process. The X-ray crystallography data indicated that the rigid structure of corn stover was disrupted with more crystallization fiber being exposed after the pretreatment process, but the crystallinity increased due to the removal of amorphous materials (lignin and hemicelluloses).
Application of EFDC Model in Preventing Water Quality Deterioration through Water Circulation
Authors: You Xue Yi , Chen Shao Feng , Hong Qing Hua , Niu Zhi Guang
Published: January 2012

The EFDC model is applied to predict the flow field of two typical circulating water body impacted by both pump driven current and wind-driven current. The result demonstrates that there exists strong effect between pump driven current and wind-driven current. The wind can effectively reduce the area of low velocity zone of pump drive current as well as the power consumption of pump. And the increased high velocity area could better inhibit the algae growth and thus prevents degradation of water quality.
Water Lubricated Mechanism Based on Multilevel Method
Authors: Peng Jin Min , Yu Jiang Bo
Published: January 2012

This paper presents the multilevel method basic theory and its material progress which is used in water lubricated plastic alloy bearing’s elastohydrodynamic lubrication(EHL) numerical calculation. On base of liner contact theory, the results of water lubricated plastic alloy bearing’s EHL numerical calculation model are gained to describe dimensionless pressure and water thickness curves. It discloses the lubrication mechanism of the water lubricated plastic alloy bearing’s EHL. The cuneiform water film of frictional surface between bearing and spindle is come into being because the plastic alloy has high elasticity and lower Young’s modulus which lead the water lubricated bearing is easy to be distorted
Theoretical Analysis and Experimental Research on Soil Deformation due to Pipe-Soil Interaction for Pipe-Laying
Authors: Feng Han , Duan Meng Lan , Wang De Guo , Hu Zhi Hui , Tong He , Ni Ming Chen , Fu Guang Ming
Published: January 2012

The interaction between pipeline and soil is a difficult problem. This paper focused on the deformation of the seabed due to pipe-soil interaction during pipe-laying, and forecasted the phenomenon of surface upheaval and plastic flow of the surrounding soil with ABAQUS. A formula for predicting the height of upheaval was introduced. An experimental device was set up to analyze the failure mechanism of the soil, and good results were obtained.
A Study on the Kinematics of 2-DOF Parallel Manipulator
Authors: Lee Jong Gyu , Lee Sang Ryong , Lee Choon Young , Yang Seung Han
Published: January 2012

In this paper, a parallel manipulator is comprised of sliders and links. The end-effector has an orientation. Sliders execute a linear motion along parallel guidelines and make the connected links rotate. We derived displacement, velocity and acceleration from kinematic analysis of this manipulator using direct and inverse kinematics,found constraint conditions and proposed the verification algorithm of constraint conditions. With the result from the simulation, we found that there was a local workspace where the manipulator cannot carry out a series of link motion.
Infrared and Visible Remote Sensing Imagery Fusion Based on Fuzzy Logic and NSCT
Authors: Huang Qing Qing , Yang Jian , Ji Yuan
Published: January 2012

Although average or region energy method are widely used in calculating low-frequency coefficients in multi-sensor fusion, these methods still have shortcomings while fusing infrared and visible remote sensing imagery. Because of the differences of infrared and visible imaging mechanism, the extent of each source image’s contribution to the fused image is uncertain. Much information could be reduced and good result can not be obtained. Fuzzy logic is an efficient way to resolve uncertain problems. Therefore, fuzzy logic and nonsubsampled Contourlet transform (NSCT) are introduced into infrared and visible remote sensing image fusion and a novel multi-scale analysis method based on fuzzy logic is proposed in this paper. The spatial detail information of fused results is improved and the experiment indicates that the proposed method can get better visual quality.
Analysis on the Performance of Wheel Loader in Typical Work Cycle
Authors: Wang Feng Yuan , Zhang Jian , Sun Rui Feng , Yu Fei
Published: January 2012

A lot of research work had been carried out for wheel loader to reduce the energy consumption and to improve work efficiency. In electronic-controlled engine stage, a new way of reducing energy consumption was provided for engineering technician. The high-power could be chosen in overloaded conditions, the small power could be chosen in light load condition, as the electronic control engine can provide multiple independent characteristic curves. The energy consumption could be effectively reduced. The subject focuses on the typical work cycles in different stages of engine power needs, and evaluates the comprehensive performance of wheel loader in full power at part throttle and part power at full throttle. The torque converter and engine matching condition were studied in full power at part throttle and part power at full throttle state. The performance of acceleration time, distance and the fuel consumption was evaluated based on the data from five tons wheel loader.
Resolver-to-Digital Conversion Using Correlation Algorithm
Authors: Cui Ming Tao
Published: January 2012

A resolver-to-digital conversion algorithm for Automatic Test System (ATS) using correlation method is presented. Sample little more than one cycle excitation signal, sine stator signal and cosine stator signal of a resolver, then use four-parameter least square wave fit algorithm to estimate the accurate frequency of the excitation signal. A standard sinusoid with any amplitude could be constructed based on the calculated frequency. Then the sinusoid is used to correlate with sine stator signal, cosine stator signal and excitation signal in order to eliminate the noises. By searching for the max values and indexes of denoised sine stator signal, cosine stator signal and excitation signal, their amplitudes and phases could be obtained. Finally based on a look-up table, any angle in 360 degrees range could be calculated with the error in 1.8e-4 rad and around 0.5 ms delay. The method shows strong portability. Computer simulation and industrial application demonstrate the effectiveness and applicability of the proposed algorithm.
Detecting Bloody Images Using Multi-Features
Authors: Wei Yuan Wang , Yin Hai Ming , Huang Xiang Qiong
Published: January 2012

In this paper, we present an automatic system for bloody image detection on the internet. A quick blood model in HIS color space is employed to identify the blood regions and then the fractal dimension and the information entropy of these regions are extracted. At last all the features are fed to a SVM -classifier to tell whether the image is bloody or not. Our experiments on real-world web image data indicate that this system can detect the bloody images with high recall ratio and high precision ratio.
On-Line Remote Detecting System of Generator’s Retaining Rings Deformation Process Based on LabVIEW
Authors: Zhao Xian Ling , Liu Jian Sheng
Published: January 2012

In the generator’s retaining ring hydraulic bulging strengthening process , the ring billet is deformed uniformly by the sealed super pressure water. During the whole process, the diameter of the ring need be detected accurately in order to reduce defects quantity. Using potentiometer displacement sensors which the nonlinear error is less than 0.05% and the repetitive error is less than 0.005mm to measure the real-time change diameter of the ring billet can improve the accuracy greatly. Convert the sensors data to digital signal and transmit to the DataSocket Server procedure. Through DataSocket Server in LabVIEW, the digital data are sent to the remote client procedure by internet. Consequently, implement the remote detecting. The experiment in 5MN oil-hydraulic machine has been done. The diameter value changes from 937.0 mm to 1210 mm in the process. The ring billet is 300MW18-18 steel retaining ring.
Economic and Environmental Assessment of Biogas Production from Straw
Authors: Hong Jing Min , Zhou Jing
Published: January 2012

A cost combined life cycle assessment was carried out to estimate the economic and environmental impact of biogas production from corn straw. Results showed that the pipeline transport, electricity, and chemicals production stages represented the dominant contribution to environmental impact in most mid-point categories, whereas infrastructure, waste treatment, pipeline transport, and raw materials (e.g., straw, chemicals, coal, diesel) price played an important role to economic impact. Results indicate that it is very difficult to develop the technology of straw for biogas production in China in case without a national financial support. In addition, optimizing the efficiency of raw material consumption and decreasing the pipeline transport distance are effective way to decrease the both overall environmental and economic burden.
Chen's Lattice Inversion Embedded-Atom Method for Nial and Ni3Al Alloy
Authors: Zhang Chuan Hui , Han Jia Jia , Huang Shuo , Shen Jiang
Published: January 2012

We explored a new type alloy EAM potential (CLI-EAM) that the value of atomic electron density and pair potential between distinct atoms are obtained by Chen’s lattice inversion based on first-principles calculations. The alloy CLI-EAM potential acquired from NiAl alloy can also apply in Ni3Al successfully and the results of basic properties agreed with the experiments. The results of formation energy of point defects of NiAl and Ni3Al alloy indicate that the structural defects are anti-site defects of Al when enrichments of Al atoms.
Stability Analysis of Rectangular Plate Based on Catastrophe Theory
Authors: Jin Guo Feng , Zhang Wei , Song Yuan Jia , Yang Zheng Wei , Tian Gan
Published: January 2012

Plates and shells are well used in structures. In order to study the nonlinear stability of plate, the total potential energy expression was deduced after analyzing the geometrical conditions of four ends simply supported rectangular plate on large deflection, the cusp catastrophic model of the rectangular plate was established based on catastrophe theory, and the bifurcation set that makes the system unstable was obtained to analyze the instability conditions of rectangular plate. The instability conditions of rectangular plate were analyzed based on this set, the critical inner stress is at the cusp point, the necessary condition of instability is σ>σcr, but the plate is stable when the movement path of control variables composed by inner stress and landscape load not across the bifurcation curves in the control space. Structures in some projects can be predigested to such a rectangular plate and this cusp catastrophic model can be used for analyzing its instability conditions for taking preventive measures.
Research on Power Amplifier for AMB Based on DSP
Authors: Zhang Jian Sheng , Jiang Da Jun
Published: January 2012

Active Magnetic Bearing (AMB), which supports freely a rotor by using controllable electromagnetic force, have a lot of advantages such as adjustable stiffness and damp that the traditional bearings can’t compare with. Power Amplifier is an important part of AMB Control System. It can magnify or convert the control signal which can’t drive the electromagnetic iron actuators directly into a power signal. Hence, the performance of power amplifier plays a crucial role in the technique capability of control system. A design method of the PWM Power Amplifier was introduced through the research of the power Amplifier, and hence the CNC fault diagnoses are realized by RBF neural network algorithm and program.
Electrospun MWCNTs/Poly(lactic-co-glycolic acid) Composite Nanofibrous Drug Delivery System
Authors: Qi Rui Ling , Liu Hui Juan
Published: January 2012

In this study, nanotubular materials multi-walled carbon nanotubes (MWCNTs) were used to encapsulate a model drug, doxorubicine hydrochloride (DOX). Then, the drug-loaded nanotubes (DOX/CNTs) with an optimized drug encapsulation percentage were mixed with poly (lactide-co-glycolide) (PLGA) polymer solution for subsequent electrospinning to form drug-loaded composite nanofibrous mats. The morphology was characterized using scanning electron microscopy (SEM). The proliferation of mouse fibroblast cells cultured on both PLGA and CNTs-doped PLGA fibrous scaffolds were compared through 3-(4,5-dimethylthiazol-2-yl)-2,5- diphenyl tetrazolium bromide (MTT) assay of cell viability and SEM observation of cell morphology. In vitro drug release behavior was examined using UV-vis spectroscopy. We show that the incorporation of CNTs and DOX/CNTs within the nanofibrous mats does not significantly change the morphology of the mats. In addition, our results indicate that this double-container drug delivery system (both PLGA polymer and CNTs are drug carriers) is beneficial to avoid the burst release of the drug. The drug loaded elctrospinning composite nanofibrous mats developed in this study may find various applications in tissues engineering and pharmaceutical sciences.
Automatic Gas Meter Reading System Based on Wireless Sensor Network
Authors: Yang Yong Jie , Lv Dong Hua , Lin Xian Xian
Published: January 2012

In view of the current status and shortcomings of existing meter reading systems, in this paper, we proposed an automatic gas meter reading system based on the advantages of gas meter directly reading technology, WSN technology and GPRS technology, introduced the whole scheme and the design of hardware and software in detail. The system is consist of three level network. The first level network and the second level network use the different frequency during communication. It decreases the interface of each other during the translation of the data, and increase the lifetime of the smart gas meter. The system has the advantages of easy construct, flexible layout, lower power consumption
Experimental Study on Direct Biomass Reburning Denitrification
Authors: Lu Hong Bo , Wang Ze Hui , Dai Hui Yu
Published: January 2012

The performances of two species of biomass reburning processes and the effect of operating parameters on NOX removal efficiency were studied using the reburning boiler burner simulator facility. The results of the study show that there is an optimal range of denitrification for direct reburning condition in reburning reaction temperature, the stoichiometric ratio(SR),the reburning ratio, article size of biomass, the concentration of NOX in the main combustion zone. The smaller the particle size of biomass, NOX removal effect is more obvious. The best biomass denitration temperature range is 950-1050 °C and the stoichiometric ratio has a best value in different experimental conditions. When reburning ratio is in the range of 10% -15%, the particle size has greater impact on the rate of denitrification. It is beneficial for NOX removal when NOX concentration in the main combustion zone is greater than 200ppm.
Traffic Throttling to Improve TCP Incast Throughput
Authors: Huo Dao An , Cao Qiang
Published: January 2012

Cluster-based storage systems are widely used by many large data centers because of the manageability, low cost and other advantages. However, typical cluster-based storage systems rely on the standard TCP/IP Ethernet for clients to access data. Clients would experience the TCP effective throughput (called goodput) collapse which is termed as Incast problem. The main reason of Incast is TCP retransmit timeout which is caused by unfairness between the competing flows. In this paper, we analyze the TCP Incast dynamics from the fairness aspect and propose a method to make the competing flows share the network resource fairly by throttling the traffic. The simulation results show that our method is able to improve the TCP Incast goodput by 10% comparing to the high-timer-resolution
Parametric Modeling of Six Typical Reticulated Dome
Authors: Lu Xiao Yang , Zhao Xiao Wei , Huang Li Li , Kong Ling Biao , Wang Chao
Published: January 2012

Based on the structure features of reticulated domes, a method for node generation and element connection of six typical reticulated domes is established in spherical coordinate system. A macro program is designed by using ANSYS Parametric Design Language (APDL). This six typical reticulated dome modeling are realized under given parameters such as span, rise high, grid number in circular and radial direction. It is proved by several examples that this method is simple, efficient and possible. It can be easily used to analysis the internal force and optimize design in shell structures
An Inverse Problem of Eigenvalue for Generalized Anti-Tridiagonal Matrices
Authors: Wang Hui , Li Zhi Bin
Published: January 2012

An inverse problem of eigenvalue for generalized Anti-Tridiagonal Matrices is discussed on the base of some inverse problems of Eigenvalue for Anti-Tridiagonal Matrices. The algorithm and uniqueness theorem of the solution of the problem are given, and some numerical example is provided
Optimizing Build Parameters for Integral Stereolithography System
Authors: Xu Guang Shen , Yang Gen , Gong Jing
Published: January 2012

To improve the dimension accuracy, an experimental investigation has been conducted to determine the optimum build parameters of integral stereolithography (SL) system with Taguchi method. The build parameters include shrinkage compensation factor of resin (factor A), liquid surface waiting time (factor B), exposure time (factor C) and light intensity (factor D). It was found that factor A, factor B, factor D and the interaction between factor A and factor D significantly affect the dimension accuracy, and the interaction between factor A and factor B, the interaction between factor A and factor D also have effects on the dimension accuracy. The optimum factors combination of the integral SL system is concluded by using ANOVA. With the optimum factors combination, an error of ±10μm has been reached using the integral SL system. Confirmation experiment results indicated that the dimension accuracy has been significantly improved with the optimum factors combination
A New Compact Dual-Band Filter Using SIR
Authors: Hu Jin Ping , Li Guo Hui , Fang Wei Dong , Zhang Wei , Hu Hai Ping
Published: January 2012

A narrowband dual-band bandpass filter based on step impedance resonator (SIR) is proposed in this paper to realize high performance with a compact size. The center frequencies of the designed filter are 2.4 and 5.8GHz, where it is suitable for wireless communication system. The absolute bandwidth approaches 200MHz with 8.3% fractional bandwidth at -3dB, and the simulations show that the return loss of the first and the second band is lower than -20dB. Between the two passbands, there is a transmission zero which can achieve a high out-band isolation. For demonstration, the filter has been fabricated and the measurement results show the excellent agreement with the theoretical simulation results
Investigation of Vibration for Vehicle Rear Axle Based on Modal Analysis
Authors: Shi Wen Ku , Guo Nian Cheng , Liu Wen Jun , Wu Guang Ming , Wang Guo Lin , Zhang Fei
Published: January 2012

Abnormal vibration of a vehicle rear axle was detected during bench test. 3D model and finite element model of the rear axle were built and the vibration modes were computed. It was found that the frequency of abnormal vibration in the bench test just matched the frequency of the first bending mode of the rear axle assembly. Therefore it can be concluded that the resonance of rear axle assembly result in the abnormal vibration and some measures are necessary, such as strengthening the half-axle sleeve or installing vibration absorber
Bioinformatics Analysis and Characteristics of UL14 Protein Encoded by UL14 Gene in Duck Enteritis Virus
Authors: Li Fang Jie , Cheng An Chun , Wang Ming Shu
Published: January 2012

Bioinformatics analysis was performed to predict the characteristics of the UL14 protein. The results revealing that there is no transmembrane region, and its molecular mass is 17524,9 Da, isoelectric point (IP) is 5.71. The phylogenetic tree shows that DEV-CHv is a separate branch, that is to say, DEV may be an osculant example among the herpesvirus genera. In addition the analysis of the physico-chemical properties demonstrates that UL14 has 6 main antigenic determinants and 5 phosphorylation sites. And the subcellular localization analysis indicates that UL14 is mainly located in cytoplasmic, nuclear, and mitochondrial. In conclusion, all those consequences are valuable for further researches on more accurate molecular characteristic of DEV-UL14.
The Airport Runway Foreign Objects Detection Method Research Based on the Algorithm of SIFT
Authors: Yu Yang , Zhang Min , Zhang Guo Hua , Niu Jie
Published: January 2012

Based on the algorithm of Scale invariant feature transform SIFT, informed a method to detection the airport runway foreign objects based on the algorithm of improved SIFT, first roughly extracts object through the image segmentation algorithm, then match the object on it’s SIFT features, ensure it’s features stability, enhance the matching accuracy. Experimental results show that this method can not only handle the problems of tar-get losing evidently, which are induced by objects rotation and translation, but also has nice robustness to the conjunction of multi-targets in the process of object tracking
Research and Exploration of Waste Money Drilling Technology
Authors: Cheng Xian Chun , Du Qiu Lei
Published: January 2012

According to the drilling of thick paper, this paper has studied the design mechanism and principles of waste money drilling machine. It mainly studies the technological process, thick paper processing drill, rotary speed and cutting force and other experiments; It also researches the orientation of "waste money"— clamping institutions, spindle box structure design; Because this design is mainly used for mass production and a large number of drilling, we should choose durable power source, and as a result, hydraulic system was chosen, Then we study the principle and system design of hydraulic system, select various valve bodies according to the hydraulic pump flow characteristics, so as to complete the feeding and clamping action of hydraulic system. Recycling waste money may save resources. Compared with previous piercing, waste money drilling processing not only reduce noise and improve production efficiency, but also reduce labor intensity, and is very favorable, beneficial to security of the processing, the check and environmental protection.
The Thinking on Premise of Constructing the System of Carbon Finance in Heilongjiang Province
Authors: Huang Ying Li , Xin Hai Rong
Published: January 2012

Forests are drawing people’s more and more attention as the main parts of carbon sequestration. Therefore, making full use of the advantage in forests of Heilongjiang province has great significance in both ecology and economy. This paper aims at raising ideas about constructing the system of carbon finance and related issues combined with the potential of carbon sequestration on the basis of the property to be cleared.
Characteristics Analysis of Double Chevron-Type Plate Heat Exchanges with Different Corrugation Ratios
Authors: Guo Chun Sheng , Du Wen Jing , Chen Yan , Cheng Lin
Published: January 2012

The thermal and hydraulic performances of working fluid in three corrugated channels have been investigated, numerically by a three-dimensional model with a new-type corrugation Plate Heat Exchanger (PHE)—double chevron-type PHE (DCPHE). The heat transfer character, the flow resistance and the Performance Evaluation Criteria (PEC) of the working fluid in double chevron-type PHE have been discussed; Results showed that the double chevron-type PHE with 2:1 of corrugation ratio was better one
Analysis and Simulation of BIG-PLUS Tooling System
Authors: Xue H.L. , Wang Gui Cheng , Shen Chun Gen , Wang S.L.
Published: January 2012

A new finite element model of BIG-PLUS tooling system are made, the BIG-PLUS tool holder and spindle deformation owing to centrifugal force generated by displacement, as well as different speed and clamping force of the radial displacement are analyzed and simulated. The results show that the radial clearance and deformation between spindle and tool holder can expand as the rotating speed increases, enhancing the clamping force and the shank of the spindle positioning accuracy and reliability of connection.
Factor Analysis and Compensation Method on NC Machining Error
Authors: Huang Chun Ying , Fu Xiao Guang
Published: January 2012

It is analyzed the error source on NC machining and the error caused by tool setting,tools-tip arc radius compensation and processing route.It is proposed to use the optical apparatus for tool setting, as far as possible to reduce the workpiece machining errors caused by the different high between cutting tool tip point and axis center. It is adoptted one-way slowly feeding and the clearance error of transmission system is eliminated, the positioning accuracy is ensured.
Electrical Discharge Characteristics of Polycrystalline Diamonds
Authors: Ye Shu Lin , Pan Wen Cheng , Ding Song Lin , Mo John P.T. , Brandt Milan , Mackie Andrew
Published: January 2012

This paper introduces the electrical discharging characteristics of PCD based on experimental studies. The relationship between gap voltage, peak current and electrical resistance of various PCD materials is presented. The influence of peak current on the discharge waveforms is analyzed. The conclusion provides important information for the development of new generators specifically designed for the machining of PCD tools.
Experimental Investigation on Chip Deformation in Drilling 1Cr18Ni9Ti
Authors: Wu Jian , Han Rong Di
Published: January 2012

It is difficult to study the chip deformation due to the complexity of the chip formation process in drilling. The chip deformation has a direct effect on the drilling forces, drilling temperature and surface quality. The austenitic stainless steel 1Cr18Ni9Ti belongs to the hard-to-cut material, so it is necessary to investigate the chip deformation of 1Cr18Ni9Ti in drilling. An experimental investigation of the chip transformation process on the cutting edges using quick-stop of the drilling processes is carried out. Results indicate that the chip deformation increases with the increment of drilling velocity and decreases with the increment of the distance to chisel edge on cutting edge and the feed rate in drilling 1Cr18Ni9Ti; the chip deformation decreases with the increment of drilling velocity, and decreases with the increment of the distance to chisel edge on cutting edge and the feed rate in drilling AISI 1045; the chip deformation in drilling 1Cr18Ni9Ti is larger than that in drilling AISI 1045.
Experimental Investigations of Surface Hardening for Aviation Aluminum Alloy in High Speed Milling
Authors: Fu X.L. , Pan Y. Z. , Wang Xiao Qin
Published: January 2012

Surface hardening plays an important role in the evaluation of surface quality and performance of wear-resisting of components. Surface hardening of aluminum alloy 7050 is researched in high speed milling by means of micro-hardness experiments and formula. It is greatly influenced by different cutting speed and material. The relationship between surface hardness and cutting parameters are obtained and studied. The surface hardening is particularly sensitive to cutting speed and slightly to the width of cut. The effect of depth variant of machined layer on micro-hardness is analyzed, and the equation between work hardening capacity and layer depth is established to predict the harden layer depth in different conditions. The experiment results show that the work hardening capacity and layer depth in high speed cutting is greater than that in conventional cutting.
Mathematical Model and Tooth Surface Representation of Face-Gear Drive with Curvilinear-Tooth Cylindrical Gear
Authors: Wang Wen Jin , Zhang Jing , Zhang Zhi Qiang , Zhao J. , Zhang L. L. , Wang Tai Yong
Published: January 2012

A tilted head-cutter is considered the generating tool for the generation of the proposed face-gear and a mathematical model of face-gear with curvilinear shaped teeth is developed according to the differential geometry and meshing theory. The generation of a conjugated pinion is based on application of a tilted head-cutter as well. Computer graphs of the gear with curvilinear shaped teeth are presented based on the developed gear’s mathematical model, and then the equation of the gear-tooth surface is deduced. An example is presented to demonstrate the application of the proposed mathematical model.
Development of Metal Injection Moulding Process for Medical Applications
Authors: Omar Mohd Afian , Subuki Istikamah , Abdullah Noorsyakirah
Published: January 2012

To counter the problems associated with the conventional processes of producing implants, a new approach has been invented, which is the adaptation of the injection moulding process for manufacturing the fracture fixation plates. With this technique in place, we have now taken a step in the right direction towards rapid manufacturing of fracture fixation plates, for the first time. The fracture fixation plates produced using this technique comply with the international standards including MPIF Standard 35, ISO 5832-1 and ISO 10933. The advantages of the present invention are design flexibility, rapid manufacturing, cost effectiveness and minimal waste compared to conventional process
Application of Computed Tomography in Wood-Polymer Composites Density Detection
Authors: Han Yu , Qi Da Wei , Guan Shu Yue
Published: January 2012

CT technology was used in nondestructive testing procedure of Wood-plastic composite in the paper as well as computes the CT number range of different Wood-plastic composite tomography slices in statistic method. A fitting mathematical model between CT number and Wood-plastic composite density was Calculated, because of the linear relationship exists between Wood-plastic composite density and CT number. Hence, a new method in the nondestructive testing of Wood-plastic composite density was provided.
Effect of Concentration of Nitric Acid on the Autonomous Conformation Change of a Polymer Chainwith Nonthermoresponsivenature
Authors: Hara Yusuke , Jahan Rumana A.
Published: January 2012

In this paper, theeffect of the initial concentrationof nitric acidon the soluble-insoluble self-oscillation for a novel polymer chainwith nonthermoresponsive nature was investigated. The self-oscillationoccurs induced by the Belousov-Zhabotinsky (BZ) reaction. In the condition of [HNO3] = 0.1 M, no transmittance self-oscillation occurs. In addition, in thecondition of [HNO3] = 0.2 M, the life-time of the self-oscillation is significantly short. This is because the solution pH much affects the BZ reaction. Moreover, we demonstrated that the period of the transmittance self-oscillation decreases with the increase in the temperaturein accordance with the Arrenius equation.
Influence of Process Parameters on the Deep Cup-Drawing Process by Simulation
Authors: Zhang Xiao Bing , Jiang Xiao Hui
Published: January 2012

Cup drawing, besides its importance as forming process, also serves as a basic test for the sheet metal formability. To determine the optimum values of the process parameters, it is essential to find their influence on the deformation behaviour of the sheet metal. Based on the predicted thickness and stress distribution of the deep drawn circular cup and analysis of process parameters by LS-DYNA software in the paper, it is evident that the minimum thickness is at the punch radius, which was the danger zone for breaking. BHF is the main influence factor of a axi-symmetric cup, according drawing theory, the curve of the variable blankholder force (VBHF) we designed could improve the formability of sheet. Further, it is shown mold radius has the greater influence on the deep drawing of blank sheet.
White Cloud or Black Cloud: Opportunity and Challenge of Spectrum Sharing on Cloud Computing
Authors: Liu Li Xia , Hu Gang , Huang Zhen , Peng Yu Xing
Published: January 2012

In order to fully utilize the spectrum resource, dynamic spectrum access becomes a promising approach to increase the opportunity of spectrum access with the rapid development of cognitive radio. However the performance of cognitive radio networks (CRN) is considerably constrained by its limited power, memory and computing ability. Fortunately cloud computing, which is the highlight of current research, has the potential to make up for the disadvantages because of its vast storage and computing capacity. In this paper we will discuss the convergence of spectrum sharing and cloud computing from several aspects including model, advantages and challenges. A spectrum sharing model based on cloud computing (SSC) will be introduced.
Dynamic Stiffness Characteristics and Test of the Spindle of NC Machine Tool
Authors: Liu Xiu Lian , Liu Jun Xiang
Published: January 2012

Research on spindle system of a machine tool, using Solidworks software to establish the spindle assembly model, using ANSYS finite element analysis method to analyze the dynamic rigidities of spindle systematacially. Compare dynamic rigidities of test with the motorized spindle were analyzed. Validate dynamic rigidities of the spindle accord with dynamic characteristic.
Sensitivity Analysis for Design Parameters of Cantilever Casting PC Box-Girder with Corrugated Steel Webs
Authors: Jiang Ke Bin , Ding Yong , Liu Ya Wen , Wang Ping , Zheng Feng
Published: January 2012

In order to provide a theoretical basis for the alignment regulation of prestressed box-girder bridge with corrugated webs, so that the control for alignment can be more targeted. Optimization model of alignment regulation for cantilever constructed pre-stressed box-girder bridge with corrugated webs is proposed based on optimization principle. The sensitivity of alignment error, transverse stress of bottom plate and transverse deformation of corrugated web with respect to design parameters is analyzed during three classical construction stages. The results indicate that the concrete density, concrete elastic modulus, longitudinal and transverse pre-stress are key control parameters of alignment regulation; alignment error is not sensitive to the change of uniformly distributed temporary loads; the cantilever state at one fourth span is most sensitive to the change of design parameters.
The Filtering Mechanism Modeling and Simulation of Passive Power Filter Based on Differentiator Circuit
Authors: Yu Wan Neng , Li Su Wen , Zheng Min Ying
Published: January 2012

Traditional continuous-time filters are of integer order which the power loss of passive power filter is general very much. However, using fractional calculus, filters may also be represented by the more general fractional-order differential equations. In this work, firstly, the passive elements were described with fractional-order differential equations depending on the introduction of fractional calculus application research. Secondly, the mathematical model of fractional-order filters was derived and discussed which includes high impedance at a certain frequency and low impedance at others, and the integer-order filters are only a tight subset of fractional-order filters that are testified. At last, the filter design idea to the fractional-order domain is developed and the better filter performance of the fractional-order passive power filter is validated by the mathematical model analysis and simulation results.