bluuebunny/crossref_metadata_2025 huggingface dataset:
Vibration Fatigue Analysis of the Solder Connector
Authors: Guo Xiao Xi , Li Chuan Ri , Liu Long Tao
Published: September 2011

With the increasing problems of fatigue failure of PCB in aeronautic and astronautic electronic chassis, the paper proposes a life prediction method of the solder connector based on physics of failure by simulation and physical test. The virtual modal and random vibration response of the box should be solved by finite element method in the ANSYS software, and these results have been verified by modal test and random vibration test. While the structure parameter and the environment stress of the box, the results of the simulation as the input of the vibration fatigue physics of failure model, the life of solder connector could be computed. There is a comparison between results from the CalcePWA software and it from physics of failure model and simulation.
Power Flow and Sound Radiation of a Submerged Cylindrical Shell with Internal Structural
Authors: Yan Jin , Zhang Juan
Published: September 2011

The vibrational power flow in a submerged infinite cylindrical shell with internal rings and bulkheads are studied analytically. The harmonic motion of the shell and the pressure field in the fluid is described by Flügge shell theory and Helmholtz equation, respectively. The coupling condition on the outer surface of the shell wall is introduced to obtain the vibrational equation of this coupled system. Both four kinds of forces (moments) between rings and shell and between bulkheads and shell are considered. The solution is obtained in series form by expanding the system responses in terms of the space harmonics of the spacing of both ring stiffeners and bulkheads. The vibrational power flow and radiated sound power are obtained and the influences of various complicating effects such as the ring, bulkhead and fluid loading on the results are analyzed. The analytic model is close to engineering practice, which will be valuable to the application on noise and vibration control of submarines and underwater pipes.
A Simplification Method for Acoustic Model of Big and Complex Cylindrical Shells
Authors: Wang Xue Ren , Miao Xu Hong , Liu Xin , Jia Di , Qian De Jin
Published: September 2011

It is much valuable to find a method for predicting the middle and high acoustic characteristics of big and complex structures such as ships and airplanes. Impact of the ring frequency and the damping on the vibration transmission is discussed firstly. Then the feasibility of the model simplification method for big and complex structures whose acoustic characteristics will be predicted is analyzed. At last, the simplification method was applied to predict the middle and high frequency sound radiation of the double complex cylindrical structures. Numerical results showed that the proposed method has the same accuracy as the conventional finite element method and boundary element method, and can be applied to deal with engineering problems.
Decision Making Framework for Earthquake Disaster Prevention and Mitigation
Authors: Wah Choo Kok , Zakaria Rozana , Adnan Azlan
Published: September 2011

Malaysia is a country with very low seismic. Most of the buildings in our country may not consider seismic load during structure design, thus the level of safety for remains unknown. Recently, earthquake events have become more frequent. Therefore, engineers have to be alert and kept updated with the knowledge and behavior of earthquake trend in this area. It is vital to assess the precaution measures that can be taken and consider them in the future building design. Therefore, a decision making framework in designing earthquake resistant building especially for school building in Malaysia is needed to help engineers to consider earthquake risk in the building design. This framework employed NERA Program with the assistance of SAP2000 software for analysis of the performance of earthquake resistant building.
Nonlinear Dynamic Analysis of RCS LOCA Based on Secondary Development of ANSYS
Authors: Qi Huan Huan , Zeng Zhong Xiu
Published: September 2011

Research of loss of coolant accident (LOCA) postulated on the nuclear reactor coolant system (RCS) was investigated with ANSYS program. Secondary development of ANSYS was performed to form the customized module for implementing effective and efficient RCS LOCA nonlinear analysis. A standard analysis procedure was established. It has following functions, such as parameters and modular system modeling, automatically set break, static pilot analysis, LOCA nonlinear dynamic calculation and automatic reports generation. Main pipes, Steam generator and reactor coolant pump models were molded by parameterized modular modeling method. Those models considered the nonlinear factors, such as material nonlinearities, gap and so on, constructed component model libraries of RCS. Comparing the results calculated by ANSYS and program-specific, it is showed that the results are generally consistent.
ARMA Modeling of Artificial Accelerograms for Algeria
Authors: Menasri A. , Brahimi M. , Frank R. , Bali A.
Published: September 2011

The main aim of this study is to examine on the real and simulated earthquakes effects. This paper deals with the use of ARMA models in earthquake engineering. The time-varying auto regressive moving average (ARMA) process is used as a simple yet efficient method for simulating earthquake ground motions. This model is capable of reproducing the nonstationary amplitude as well as the frequency content of the earthquake ground accelerations. The moving time-window technique is applied to synthesize the near field earthquakes, Chlef-1, Chlef-2, Chlef-3 and Attaf 1980 recorded on dense soils in Algeria. This model, is based on a low-order, time-invariant ARMA process excited by Gaussian white noise and amplitude modulated using a simple envelope function to account for the non-stationary characteristics. This simple model gives a reasonable fit to the observed ground motion. It is shown that the selected ARMA (2,1) model and the algorithm used for generating the accelerograms are able to preserve the features of the real earthquake records with different frequency content. In this evaluation, the linear and non linear responses of a given soil layer have been adopted. This study suggests the ability to characterize the earthquake by a minimum number of parameters.
Dynamic Elasto-Plastic Analysis on the Steel Arch Truss under Earthquake Action
Authors: Li Hai Wang , Guo Cai Hong , Liu Jing
Published: September 2011

In this paper, the elasto-plastic dynamic analysis on the steel spatial arch truss with 120m span and 0.1 rise-span ratio is carried out under with SAP2000. The plasticity development level and failure mode of the structure are estimated by the method of increasing the peak acceleration gradually and the plastic hinge theory. The results show that the structure displacement response changed nonlinearly with the increased peak acceleration of the earthquake; Its critical peak acceleration of EL earthquake wave when applied in horizontal direction is 222gal, and is 274gal when applied in vertical direction; The ratio of its maximal node horizontal and its structural height is 1/783 when EL-Centro waves applied on structure in horizontal direction; The ratio of its maximal node vertical and its structural span is 1/751, when EL-Centro waves applied in vertical direction; The failure mode of the truss under the earthquake action is elasto-plastic dynamic buckling.
Numerical Simulations on the Cable Clamp of a Concave Cable Arch
Authors: Chen Yao , Feng Jian
Published: September 2011

The inner concave cable arch structure has been adopted in some engineering applications in recent years. Geometric configuration of the cable clamp joint and its anti-sliding performance is the key to assure the bearing capacity for this type of structure. In this study, nonlinear finite element analysis on the cable clamp joint of a concave cable arch is performed using ABAQUS, with influences of the friction coefficients and the nonlinearity of materials are investigated. The pretension loss of bolts caused by different tightening sequences is also discussed. It is found that nearly 9% of the initial pretension force for each bolt gets lost during the tightening process, and mutual influence of the bolts can be significantly weakened by applying reasonable tightening sequence.
Nonlinear Stability Analysis of the Reinforced Absorption Tower
Authors: Zhang Yu Xu
Published: September 2011

Stability of the large thin-walled absorption tower is essential to its safe operation. The large finite-element analysis software is adopted for parameterized modeling of the tower. It requires the internal pressure of the tower tube to be the load form of the partial yield on the tower, respectively considering the structural model displacement and the actual dent on the tower surface as the initial defect, and performing the nonlinear buckling analysis of the reinforced absorption tower structure. As is indicated, the yield load produces lesser effect on the initial defect. Meanwhile, when the structure yields critically, plastic deformation takes place in some part of the tower tube due to potentiation of the stiffening ribs. Moreover, stiffening ribs and wall thickness improve the stable load. With the increase of wall thickness, the load of critical stable internal pressure on the tower grows constantly but the critical stable load increases more slowly.
Research on Tire Pressure Monitoring Inflatable Restraint System
Authors: Li Tan , Yin Qi Xin , Chen Xi , Hou Yong Ping
Published: September 2011

According to statistics, 70% of national highway traffic accidents are due to tire blowout, and a speed of more than 160km/h makes mortality possibility up to nearly 100%. In light of this, the Tire Pressure Monitoring Inflatable Restraint System is put forward. Sensor can send signals to the controller, and then the controller directs the gas generator to generate a lot of gas instantly, and the tire is inflated, so that the instability of the vehicle is eased. In this paper, principle and process of TPIS are illustrated in detail. The process of blowout, sensor detection, control process and the vacuum tire inflation are also scientifically analyzed.
Dynamic Peculiarity of Piezoelectric-Stack Displacement-Amplifying Actuator
Authors: Jin Hong , Jin Long , Hu Min Qiang , Xu Zhi Ke
Published: September 2011

In order to find out the dynamic peculiarity of piezoelectric-stack displacement-amplifying actuator, three methods: harmonic response analysis, impedance test and dynamic grating projection are used to analyze it. Experimental results indicate that the displacement-amplifying mechanism can provide large output torque; its response time is less than 0.3ms; its mutation time of displacement is less than 0.5ms, the fluctuation of displacement is less than 5um, and the change of displacement vs. voltage is linearity variety; its dynamic displacement is smooth, when discharging. After analyzing the actuator, some virtues of dynamic response peculiarity are shown: rapidly responding, tiny displacement fluctuates, fine displacement linearity, higher precision, large output torque, etc. Therefore it can be abroad applied in many micro-displacement control and drive systems, which need high precision and large displacement. Its application prospect is worth to expect.
Dynamical Analysis on a Mass at the Tip of a Flexible Rod on a Rotating Base
Authors: Liu Zhan Fang , Guo Xiao Wei
Published: September 2011

Abstract: A dynamical analysis on a mass fixed at the tip of a massless flexible rod mounting on a rotating rigid body is presented in which the motion of the mass is kept in the plane of rotation as small deformation of the rod is assumed. For the rigid body undergoing a constant angular velocity the centrifugal forces and Coriolis force on the mass are considered. There exist two dynamic frequencies in which the first order dynamic frequency decreases with rotational velocity up to zero that is associated with a limit rotational velocity of the system. The motion trajectories of the mass in the rotational plane at different rotational velocities exhibit multiple traces with respect to the conventional line trace and may be split into the non-eccentric and eccentric portions. With a view on the change of amplitudes a critical rotational velocity is discussed.
Study of Critical Speed for a Flexible Drill String System Based on Fluid–Structure Interaction
Authors: Yu Gui Jie , Fu Lei , Yin You Cai
Published: September 2011

The TDS changed the drive mode and established a simple, flexible multi-body drill string system. The system consists of a derrick, a hoisting system, TDS, and a drill string system, and is inserted into a long, narrow borehole. The drill string then interacts with mud, the borehole wall, and the bottom hole, which generates resonance and increases the risk of drilling accidents. Natural frequency, which is related to the structure of the drill string, determines critical speed. In a vertical well, the transverse, torsional, and longitudinal fluid–structure interaction vibrations of the flexible multi-body drill string system within 1,700 m was analysed using the ANSYS. The natural frequency and the associated critical speed for different bottomhole assemblies (BHAs) were obtained. Results show that reasonably selecting the TDS rotation speed and optimizing BHA offer practical engineering applications for increasing drilling speed, reducing drilling accidents, and improving economic returns.
Drag Force Analysis of Spheres Penetrating Gelatin Based on Surface Integral
Authors: Mo Gen Lin , Wu Zhi Lin , Liu Kun
Published: September 2011

A new method based on surface integral is presented in the research of mechanical mechanism of spheres penetrating gelatin. On the assumption that each wetted area element is applied with dynamic force perpendicular to the surface, frictional force parallel to the surface and material resistance which is a constant, the resultant force applied on spheres was integrated containing three unknown coefficients. Transparent gelatin was used in the experiments and steel spheres were fired at speed around 800m/s. High speed cameras got the position data of the penetrating spheres. The uncertain coefficients in the movement equations were determined with these data. The equations were solved in analytical forms. Experiments show that the coefficients are constant for spheres with different radiuses. Calculation results demonstrate that the mechanical model is good to predict the movement of spheres in gelatin.
The Research on Nonlinear Vibration Characteristic of Ravingneaux Compound Planetary Gear Sets
Authors: Qian Bo , Wu Shi Jing , Li Hong Wu , Xu Jin
Published: September 2011

The nonlinear dynamic model of Ravingneaux compound planetary gear sets has been built. The model includes time-varying mesh stiffness of gears, backlash as well as comprehensive mesh errors nonlinearities. By introducing relative displacements of components as the new generalized coordinates, uniform nonlinear differential equations of compound planetary gear sets are built. Then the nondimensional dynamic differential equations are derived. The nonlinear differential equations have been solved utilizing ariable step size Gill method. By changing system nondimensional excitation frequency, monocycle anharmonic response, multiply periodic subharmonic response, quasi-periodic response and chaotic response are obtained. By means of time histories, phase-plane diagram, Poincare maps and power spectrum, various responses are compared and analyzed in detail.
Optimal Sensor Placement Based on Damage Sensitivity of Modal Parameters
Authors: Zhang Xin Jun , Li Fan , Peng Wei
Published: September 2011

In this paper through to analyse the sensitivity of several modal parameters about the elastic modulus damage such as characteristic frequency, modal displacement, flexibility matrix and modal curvature , Combined with Fisher information matrix , got the sensitivity of modal parameters on different damage positions of bridge. Computational simulation of Jian Tiao bridge is implemented with this method to find Optimum sensor placement schemes of different parameters. And through the result of numerical analysis we know, flexibility matrix is the most sensitive parameter about damage of elastic modulus, modal sensitivity less than flexibility matrix, the third is frequency. Sensitivity of modal curvature is the dullest, its sensitivity only 1/300 than flexibility matrix. It have different sensor arrange schemes when use four different modal parameters, among them the sensitivity of flexibility matrix is highest.
The Test Scheme Research on Active Control of Coupled Vibration between the Multiple CNC Milling Machines and the Flexible Foundation
Authors: Peng Qian Lin , Li Yao Gang , Ma Fu Dong
Published: September 2011

Analysis of the study based on the Working principle of machine isolators-flexible foundation system which combines with multiple exciters and sensors, an MIMO active vibration isolation test model is constructed. In addition, the choice of system device and the distribution position of the vibration isolators and sensor are revealed and analyzed. Ultimately the Pilot scheme of the MIMO active vibration isolation Pilot scheme is confirmed.
Optimal Damper Location for Mid-High Frequency Vibration Control on Built-Up Structures: Case Study Using VA One
Authors: Muthalif Asan G.A.
Published: September 2011

This paper presents a guide to identify optimal damper location to reduce vibration on built-up structures. The guide is derived from simulation studies carried out on a set of benchmark models. Optimization is carried out using genetic algorithm. Optimal location is found using found using Generic algorithm and the hybrid method. The hybrid modelling method combines the finite element method (FEM) and Statistical energy analysis (SEA) to provide an efficient response predication for mid-high frequencies. The guide to find optimal damper location is tested on a fuselage model of Boeing 737. The fuselage model is developed using VA One software. Good agreement is seen for the optimal locations using the simple guide and result from VA One.
Diagnosing Intermittent Faults to Restrain BIT False Alarm Based on EMD-MSVM
Authors: Guo Ming Wei , Ni Shi Hong , Zhu Jia Hai
Published: September 2011

Intermittent fault is an important factor causing built-in test(BIT) false alarm. Diagnosing intermittent fault is an important approach to restrain BIT false alarms. This paper proposes a intermittent faults diagnostic methods based on empirical mode decomposition (EMD) and multiple support vector machine (MSVM). Firstly, the EMD method is used to decompose the original signal into a number of intrinsic mode function (IMF), the auto-regressive (AR) model of each IMF component is established. The AR model parameters and the variance of remnant are regarded as the feature vectors, are input to MSVM classifier, so the working conditions and faults are classified. The experimental results show that the BIT false alarm caused by intermittent fault can be effectively reduced by this proposed method.
The Study on Influence of High Frequency Noise on Sound Quality for Generator
Authors: Ma Zha Gen , Xu Xue Ying , Han Guo Hua
Published: September 2011

As cars become quieter the sound quality of components becomes more critical in the customer perception of car quality. This requires a need of new evaluation method for the specification of component sounds. Considering that high frequency noise plays an important roll for internal noise, the noise signals in the range from 7000Hz to 8000Hz are specially emphasized. Then the acoustic evaluation parameters, such as Sound Pressure Level, Sharpness and Steadiness have been evaluated. Judged from experiences and measuring results, an abnormal noise comes from Generator, through the exchange of Generator, Sound Pressure Level and sharpness were greatly improved. At the same time, subjective evaluation also indicated that there was no complaint any more in passenger compartment. Low Sound Pressure Level, sharpness can lead to perceived high product quality.
The Study on Structure Vibration Real-Time Monitoring System
Authors: Yang Su Jun , Yang Yong Chun , Fan She Ming , You Hui En
Published: September 2011

On the basis of the review of the present situation and existing problems in structure real-time monitoring system, the paper designs and develops a structure vibration real-time monitoring system. In process of the application, spectral analysis was carried out through fast Fourier transform (FFT) technology, at the same time, the deformation and inherent mode shapes are monitored. In one words, the system realizes synchronously the real-time display of the structural total characteristic, mode shapes, time and frequency signals of key testing points on computer screen. In order to prove the validity of the system, the paper the paper takes a simple-supported beam for an example and receives a satisfying result.
Numerical Simulation of the Buried Object Detection Based on Underwater Plasma Acoustic Source
Authors: Zhang Jun , Zeng Xin Wu , Wang Yi Bo , Zhang Zhen Fu , Chen Dan
Published: September 2011

Detection and classification of buried objects is of great importance in underwater counterterrorism and archaeology. To penetrate the sediment, a low frequency intensive acoustic source is needed. Underwater plasma acoustic source (UPAS) with high voltage discharge has the advantage of adjustable pulse length, high source level output and no pollution to the environment, which can satisfy these needs. In this paper, we introduced the UPAS, including its basic mechanism, structure and pressure output. Then we build up an elastic wave propagation model, solved it with finite difference and staggered grid methods, and combined with certain source and boundary condition, we simulated and analyzed the pressure wave propagation in time domain with an aluminum cylinder buried in sediment, from the results we validated the effectiveness of UPAS in the application of buried object detection.
Numerical Simulation of Shield Tunnel Passing Through Underground Structure
Authors: Li Yong Suo , Zhang Ke Neng , Deng Mei Long , Huang Chang Bo
Published: September 2011

Shield tunneling is often adopted in underground engineering such as civil tunnel construction and mine excavation. The program FLAC3D is used to simulate the process of the tunnel excavation through underground structure in Shenyang in this paper. The analysis results show that,(1) the soil below the end wall suffers great displacement, when the shield approaches the end wall of underground framework from different directions, so the soil under the end wall needs to be reinforced. (2) Increasing pressure and volume of grouting can’t significantly reduce the amount of surface subsidence when the drilling of the shield acrosses through the independent foundation. (3) The influences of shielding to the construction are limited because of the constraint function to the surrounding rock above the tunnel by the great entire rigidity of under-ground framework. The results of numerical simulation exactly matches the monitoring data when the stiffness of under-ground frame structure is considered, and it can provide guidance for engineering practice.
Parametric Study on Reinforced Concrete Beams with Transversely Prestressed Bars
Authors: Liu Can , Wu Bo , Xu Kai Yan
Published: September 2011

This paper presents a method that using inner transverse prestressing bars to enhance the shear capacity of concrete beams, which can be used in new transformer beams to decrease the sectional dimensions. Four transversely prestressed concrete beams and one ordinary reinforced concrete beam were tested. The nonlinear finite element method was applied to analyze them, parametric study was carried out to analyze the behavior of transversely prestressed concrete beam, and the following conclusions can be drawn: (a) With the increase of the prestressing force level, the shear capacity of transversely prestressed concrete beam increase rapidly, which means that prestressing force level has a significant effect to the shear capacity of transversely prestressed concrete beam. (b) If the area of transversely prestressing bars is almost same, the transverse bars with smaller diameter and smaller spacing can enhance shear capacity of transversely prestressed concrete beam more efficiently. (c) If steel plate of 100 mm×350 mm×16 mm being changed to steel padding of 100mm×100mm×16 mm the shear capacity of transversely prestressed concrete beam will decrease little. It means in the actual engineering the steel plate can be changed to steel padding, and then the amount of steel will be reduced.
Research on Support Structures of a Horizontal Axial Tidal Current Energy Conversion System
Authors: Sun Ke , Ge Pei , Zhang Liang , Sun Yao Gang
Published: September 2011

Three support structures with different configurations have been selected to be presented in this paper. Through numerical simulations of structures subjected to current loads, wave hydrodynamic loads and inertia loads, some useful results are gained. The results show that first scheme is simple but stress is largest of all, and second scheme is reasonable for the loads are transferred effectively, and third scheme is less stable. Thus research work provides a valuable reference for harnessing of tidal energy.
Research on Structural Influencing Coefficient of Moment-Resisting Steel Frames
Authors: Li Cheng , Gu Qiang , Wang Jun
Published: September 2011

This paper is focused on the evaluation of the structural influencing coefficient in multi-story moment-resisting steel frames involving local bucking effect, with due consideration to both their ductility and overstrength. Ductility and overstrength play an important role in keeping satisfactory performance of structures during strong earthquake. Firstly, moment-resisting steel frames of are designed according to Chinese seismic code. Based on the non-linear shell element method, both inelastic time history and pushover analyses has been performed on these steel frames to get the global capacity envelopes. The results show that number of stores and spans have effect on the behaviour factor values, and that the local buckling affects the ductility capacity of steel frames. Finally, based on the findings presented in the article, tentative influencing coefficient values are proposed for moment-resisting steel frames.
Comparison of Asphalt Ultraviolet Radiation Aging with other Aging Types by Infrared Adsorption Spectrum
Authors: Wu Huai Rui , Wu Jin Ting , Ye Fen
Published: September 2011

This study introduces the theory of asphalt aging with infrared adsorption spectrum. Qualitative and quantificational comparisons are carried out between Karamay asphalt ultraviolet radiation aging, after which asphalt turns from sol-type to gel-type and other aging types. The variance ratio of absorbance A at 1700 cm-1in infrared spectrum chart is consistent with the tendency of asphalt’s three general indexes, including penetration, ductility and softening point. The oxidation speed of ultraviolet radiation aging is 1.80~6.23 times that of thermal aging. In addition,the process of photo-oxidation, the order of carbonyl content in different asphalt samples, the influence of ultraviolet radiation on long term aging of asphalt and other useful information has been gained for better and further researches in this field.
An Experiment on Seismic Shear Capacity for HRB500 Grade R/C Frame Columns within Yield Hinge Regions
Authors: Guan Pin Wu , Chen Meng
Published: September 2011

An experiment on shear capacity for HRB500 grade R/C frame columns within yield hinge regions is studied. The different failure modes for specimens within yield hinge regions are classified, and the hysteretic curves are studied. The shear contributions of stirrups and concrete for columns are analyzed in detail. Based on the experimental study, formulas for the shear capacity of reinforced concrete columns are supposed under seismic loading, and the different formulas are adopted to estimate the shear capacity for columns at different seismic levels, Both security and economy of structural design are all considered.
Experimental Study on Acoustic Emission Characteristics of Splitting Damage Processes for Different Ages of Concrete
Authors: Wang Yan , Wu Sheng Xing , Chen Shuo , Wang Yao , Wei Bao Long
Published: September 2011

A total of 18 specimens’ damage processes of concrete under split load in 1d, 3d, 5d, 7d, 14d and 28d ages are monitored by acoustic emission (AE) technique and corresponding typical AE characteristics are summarized. The results show that splitting tensile strength of concrete and the number of AE hits are both showing a gradual increase with the growth of age. During the process of splitting failure of concrete specimens in 14d and 28d, AE hits in higher duration and amplitude are collected, It shows that the older concretes tends to release more energy, at last, AE parameters which are in higher correlation with the development of mechanical properties for early age concrete are given. Related research conclusions can provide the foundation for the research of strength development and damage mechanism of early age concretes.
Structural Damage Localization Using D-S Evidence Theory
Authors: Zhao Jian Hua , Zhang Ling
Published: September 2011

Damage localization is a key issue in the Structural Health Monitoring (SHM). In order to enhance the accuracy of damage localization, an approach based on D-S evidence theory is studied in this paper. First, damage results obtained from the modal strain energy change ratio (MSECR) method and the multiple damage location assurance criterion (MDLAC) method are regarded as two independent information sources, respectively. And then, the D-S evidence theory-based information fusion technique is employed to integrate these two results and make a final decision. To compare the damage identification results under different methods, a practical damage evaluation indicator is presented. Numerical study on a cantilever beam is carried out to verify the proposed method. Results indicate that the damage evaluation indicators calculated by D-S evidence theory are superior to the single method. That is to say, structural damage identification method based on D-S evidence theory performs very well in determining the damage locations.
Design of USB-GPIB Controller Based on up D7210
Authors: Hao Niu Jun , Yu Zhang Jing , Hu Cong , Hua Yin Xian
Published: September 2011

In this paper, a designing method of USB-GPIB controller is introduced in detail, the hardware structure and principle are expounded. By using upD7210 which is a GPIB interface chip and CY7C68013A which is a USB interface controller, the GPIB bus controller with USB interface is designed. With the corresponding driver, an automatic test system is established to realize automatic control by GPIB bus. The USB-GPIB controller has been provided with small size, high speed, and low cost advantages.
Research on Development for MES of Mould Making Based on WEB Platform and B/S Mode
Authors: Yu Jian Guo , Feng Mei Lin , Huang Peng Peng , Xu De Chang
Published: September 2011

For the development about Manufacturing Execution System of mould making, the difficulty in manufacturing execution management is pointed out by combining mould making process with current management regulations of mould making enterprises. Goal of the system is analyzed and its main function is designed. System architecture is established based on WEB platform and B/S mode, The physical data model is designed by using PowerDesigner software and implementation methods of some critical functions for manufacturing execution system are developed based on JSP. Through practical enterprise application, it is proved that the system immensely enhance the manufacturing execution management level for mould making enterprises.
Mechanical Mechanism Analysis for Qianjiangping Landslide Damage on Three Gorges Reservoir
Authors: Feng Qiang , Xiao Shi Rong
Published: September 2011

Non-linear finite element analysis is given for the neonatal landslide——Qianjiangping Landslide which happened after the first sluice in Three Gorges Reservoir, the conclusions are discussed from the two aspects: Three Gorges Reservoir sluice and heavy rainfall.
The Dynamics of Entropy Exchange between Field and Atom
Authors: Yan Xue Qun
Published: September 2011

This paper investigate the partial entropy changes of the field and the atom in a system of an atom interacting with a single quantized cavity field including acceptable kinds of nonlinearities of both the field and the intensity-dependent atom-field coupling. The work shows that the substantial entropy exchange can occur when the mixed state parameters of the atom and the average number of photons in the cavity are respectively bounded within certain parameter regimes, and the substantial entropy exchange is independent of the parameters of the non-linear medium, the intensity of non-linear coupling and detuning. It is also explored that the detuning leads to collapse-revival of the field and atomic partial entropy changes occurring.
Comparative Analysis and Assessment on Oxidation Resistance of Proanthocyanidin Extract from Sanguisorba Root
Authors: Jiang Gui Quan , Fang Gui Zhen , Pang Jiu Yin
Published: September 2011

We introduced the oxidation method of Lecithin liposome which induced by Fe2+ and fluorescence chemiluminescence method. The method used to determine the ability of the proanthocyanidin extracted from Sanguisorba of inhibit liposome peroxidation, scavenge superoxide anion(O2－.) and hydroxyl free radical(·OH). We carried out a comparative analysis with rutin, extract of Grape Seed and vitamin E (VE) in antioxidant ability. As revealed in the results, compared the extract of Grape Seeds and VE, the inhibition ratio of proanthocyanidin extracted from Sanguisorba to inhibit liposome peroxidation is 1.62 and 7 times, scavenge superoxide anion (02－.) is 1.6 and 10.15 times and scavenge hydroxyl free radical（.OH）is 1.9 and 29.5 times, respectively. The results demonstrate that proanthocyanidin extracted from Sanguisorba show better antioxidant ability, which further revealed that resource of sanguisorba is more worth exploiting and applying.
Research on the Concurrency Control Communications Protocol in BioMedical Information Service System
Authors: Du Xiao Xin , Wang Bo , Tian Jing Zhi
Published: September 2011

In allusion to the transaction trait of the object-oriented mobile real-time database in the biomedical information service system, the new concurrency control communications protocol (PAI-OM-2PL) is put up with the fusion of common object two stages lock protocol (2PL) and concurrency control communications protocol (PAI-2PL) of traditional mobile real-time nested transaction. The aim of proposing this new communications protocol in the biomedical information service system is to give full play to transaction semanteme, can earlier release lock with using open nested transaction model. The performance of PAI-OM-2PL was tested on the object-oriented database (db4o) in the biomedical information service system, at the same time we simulate mobile computing setting. The result is that the performance is enhanced by using the new communications protocol in some surroundings.
Analysis of Peptides in Plasma by High Performance Liquid Chromatography Coupled with Electrospray Ionization Mass Spectrometry
Authors: Fang Hai Yan , Liu Yin , Wang Shu Fang
Published: September 2011

In this study, a high performance liquid chromatography coupled with electrospray ionization mass spectrometry (HPLC-ESI-MS) method for the determination of eight endogenous peptides, which included angiotensin-II, neurotensin, 5-met-enkephalin, 5-leu-enkephalin, somatostatin, bradykinin, dynorphin A and oxidized glutathione, was developed. MS parameters were optimized in order to obtain the best signal intensity. The optimum MS parameters were: fragmentor: 100 V; nebulizer gas (N2) pressure: 40 psi; drying gas (N2) flow rate: 10 L/min; drying gas temperature: 350 °C; capillary voltage: 2000 V. Validation of the method showed positive results. The correlation coefficients (R2) between the peak areas and the corresponding concentrations of peptides were greater than 0.9903. The limits of detection (LODs) (S/N = 3) of the eight peptides were 3.88 ng/mL ~ 17.5 ng/mL. The developed method had been successfully applied to analyzing the human plasma fortified with the eight peptides, which indicated the potential of the methodology for the analysis of biological sample.
Treatment of Silicon Steel Wastewater with Fenton Reagent
Authors: Zhang Wen Yi , Chen Rong , Luo Xin , Li Qiu Yan , Han Ning
Published: September 2011

The paper aims to find out an economic and effective treatment for the silicon steel wastewater. According to the Fenton reaction principle, chemical adsorption and chemical flocculation, chemical oxygen demand (COD) and Cr6+ in the wastewater were reduced. The appropriate parameters were as follows: the mol ratio of Fe2+ to H2O2 was 1:2, the mol ratio of Fe2+ (dosage into the wastewater) to Cr6+ (content of the wastewater) was 5.2:1, pH 3-4, temperature 15-35°C. Under these conditions, the removal rate of Cr6+ and CODCr was 99.99% and 98.11% respectively, the Cr6+ and CODCr of the influent reduced from 2959mg/L and 1351mg/L to 0.421mg/L and 25.6mg/L respectively, and the effluent concentration achieved 1-class in "Steel Industrial Water Pollutant Discharge Standard(GB 13456-92)".
Study on Isolation and Degradation Mechanism of Bacteria for the Biodegradation of Microcystins (MC-LR)
Authors: Zhang Wen Yi , Li Qiu Yan , Han Ning , Chen Xue Zhen , Chen Xiao Liang
Published: September 2011

A microcystin-degrading strain named as T1 was isolated from Taihu Lake sediment. Based on the morphological observations, physiological-biochemical analysis and tests for biodegradability, the study results showed that the degrading rate of MC-LR reached 60%~70% by T1 strain after 48 hours reaction. The optimal treatment parameters of T1 strain were as follows: pH 7.0, inoculum concentration 8% and rotating speed 120 rpm. Moreover, the concentration of carbon source has some stimulating effect on the degradation of MC-LR. The study has significant reference and actual application value for the biodegradation of MC-LR in eutrophic water.
Study on Biological Aerated Filter (BAF) of Algae-Contained Micropolluted Water
Authors: Zhang Wen Yi , Han Ning , Yan Gang , Xu Xia , Chen Xiao Liang
Published: September 2011

Using NaCl modified zeolite with high specific surface area as filter media, algae-contained micropolluted water was treated with biological aerated filter (BAF) process. The removal efficiencies of the process on micro-pollutants and removal mechanism of algae-contained micropolluted water were investigated and studied. The results showed that better removal efficiency was obtained in turbidity, Chlorophyll-a, UV254, and CODMn when algae-contained micropolluted water was treated by BAF. The optimal process parameters of the treatment of algae-contained micropolluted water with BAF were gases/water ratio of 0.5~2.5, backwash cycle of 3~5 d, air/water backwash strength of 5~7 L/(m2·s), air backwash strength of 13~17 L/(m2·s), backwash time of 15~20min, temperature of 25~30°C, pH value of 7.8~8.5 and hydraulic load of 0.23~0.35 m3/(m2·h). The results of continuous running for 21 days showed that the removal efficiency of turbidity, Chlorophyll-a, UV254, and CODMn were up to 71.61%, 81.35%, 28.34% and 32.97% respectively under the conditions of these optimal parameters, and the effluent water could meet Grade II of the Drinking Water Quality Standards (CJ 3020~1993). This study could provide technical information for town water plant reconstruction of Taihu Lake and Chaohu Lake basin.
Stochastic Optimization of Empty Container Repositioning of Sea Carriage
Authors: Wang Bin , Yang Tao
Published: September 2011

To improve the efficiency of empty container repositioning for a shipping company, a stochastic optimization model of empty container repositioning of sea carriage was established by chance-constrained programming. The objective function was to minimize the cost of empty container repositioning including shipping, rening and shortage cost. In the model, shipping cost was decided by the number of ship used for empty container repositioning. The constraints of the model included meeting the need of empty containers, limit to the number of empty containers provided and the capacity of shipping. The numbers of empty containers required are stochastic. The stochastis model was transferred to an integer programming one. Lingo9.0 was used to solve the model and simulation was done under varied parameters to get a good shipping strategy. The results show that the model can provide an effective program of empty container repositioning for a shipping company and it is a good way to raise shipping efficiency.
Construction of Two Vectors for a Bypass of Monocotyledon Plants Photorespiration
Authors: Bai Xue Liang , Wang Dan , Liu Ning Ning , Wei Li Jing , Zhu Ye Rong , Bai Yan Ling , Wang Yong
Published: September 2011

In order to modify the photorespiration of monocotyledonous crops, we aimed to construct vectors that will be used to introduce a bypass to the native photorespiration pathway. Firstly, we cloned the encoding sequences of glyoxylate carboligase (GCL) and tartronic semialdehyde reductase (TSR) fromE. coli, glycolate dehydrogenase (GDH) fromArabidopsis thalianaand chloroplast transit peptide (cTP) from rice. Then we constructed a universal vector pEXP harboring the encoding sequence of cTP for targeting a protein into chloroplast. By insertion of these three encoding sequences into the universal vector pEXP, we obtained the expression cassettes for GCL, TSR and GDH, respectively. Finally, we inserted the cassettes for GCL and TSR in tandem into the binary vector pCAMBIA 1301, and for GDH into another binary vector, pPGN, to obtain our plant expression vectors pCAMBIA 1301-TG and pPGN-GDH, respectively. These two expression vectors possess different selection resistance and can be used to transform monocots together, to introduce the bypass pathway of photorespiration. By this way, the transgenic plants can recycle glycolate, the by-product of photosynthesis in C3plants, within the chloroplast, simultaneously, save energy and avoid the loss of ammonia, which will contribute to improved growth.
Study on Nitrogen, Phosphor and Chemical Oxygen Demand of Differnt Categories of Aquaculture Lakes by Means of Principal Component Analysis, Factor Analysis and Cluster Analysis
Authors: Gong Luo Jun , Yang Xue Fen , Xiong Bang Xi , Li Gui Ping , Chen Xian Li
Published: September 2011

The author measured TN, NH4+-N, NO2--N, NO3--N, TP, PO43--P and CODMn of the five aquaculture lakes that is, Liangzi Lake, Futou Lake, Chaipo Lake, Nanhu Lake and Yezhi Lake, in Wuhan in 2007, and had analyzed the results by means of Principal Component Analysis (PCA), Factor Analysis (FA) and Cluster Analysis (CA). The PCA result showed that the two principal components were nutrient factor (including TN, NO2--N, NO3--N, TP, PO43--P and CODMn) and ammonium absorption factor (NH4+-N), with their function expression integrated. The results of FA and PCA were in conformity, with their factor score function expression integrated. R-mode cluster result indicated that the seven hydrochemical indexes could be divided into four categories, i.e. NO3 - -N, TP, TN and NO2--N make up of one category, and another three categories were PO43--P, NH4+-N and CODMn, respectively. Q-mode cluster result showed that the five lakes can be divided into two categories, Futou Lake and Liangzi Lake is one category, and Chaipo Lake, Yezhi Lake and Nanhu Lake is the other, which has been caused by urban waste water, domestic sewage and aquaculture production.
Identification of ZAG Protein as a Novel Serologic Biomarker Candidate for Liver Cancer
Authors: Wang Fei , Geng Yu , Zhang Wei Ming , Geng Xin
Published: September 2011

To identify Zinc-alpha-2-glycoprotein (ZAG) expression in HCC for serum biomarker, by analyzing the serum proteome of the patients suffering from primary hepatocellular carcinoma (HCC), liver cirrhosis and healthy donors. The serum proteome of the patients from HCC, liver cirrhosis and healthy donors were separated and identified by two-dimensional electrophoresis. The differentially expressed proteins were analyzed by peptide mass fingerprint based on MALDI-TOF-MS and SWISS-PROT or BLAST nr database searching. RT-PCR and Western blotting analysis were used to confirm expression of ZAG in HCC. Five differentially expressed proteins were identified. Albumin, Serotransferrin, CD5 antigen-like precursor ( IgM - associated peptide) were down-regulated in HCC, ZAG and Ig gamma-1 chain C region were up-regulated in HCC. ZAG, a lipid mobilizing factor, is a member of the major histocompatibility complex (MHC) class I family of protein. Five proteins which were found differentially expressed in HCC provided useful information for screening diagnostic tumor markers of human HCC. ZAG might be a novel candidate serum biomarker for HCC early diagnosis.
Bioinformatics Analysis of Zinc-Alpha2-Glycoprotein，a Potential Serological Marker for Hepatocellualr Carcinoma
Authors: Wang Fei , Geng Yu , Zhang Wei Ming , Geng Xin
Published: September 2011

To Analyze the structure and function of Zinc-alpha-2-glycoprotein (ZAG), a highly expressed serum protein in the patients with hepatocellular carcinoma (HCC). The serum proteome of the patients from HCC, liver cirrhosis and healthy donors were separated and identified by two-dimensional electrophoresis and MALDI-TOF-MS. RT-PCR and Western blotting analysis were used to confirm ZAG highly expressed in HCC. Bioinformatics technologies were used to analyze the structure character of ZAG protein. Five differentially expressed proteins were identified. Albumin, Serotransferrin，CD5 antigen-like precursor ( IgM - associated peptide) were down-regulated in HCC, ZAG and Ig gamma-1 chain C region were up-regulated in HCC. Zinc-alpha-2-glycoprotein (ZAG), a lipid mobilizing factor, is a member of the major histocompatibility complex (MHC) class I family of protein. ZAG protein might be a potential serological biomarker for HCC early diagnosis.
Synthetic Aperture Focusing Technique and Contrast Source Inversion Algorithm Applied in Elastic Wave Imaging
Authors: Qi Ji , Miao Jing Hong , Xie Yu Xin
Published: September 2011

In this paper the linear synthetic aperture focusing technique (SAFT), the nonlinear contrast source inversion (CSI) algorithm and the CSI algorithm with extended approaches, such as frequency approach and regularization approach, are applied to reconstruct a complicated target immersed in water from the experimental elastic wave data. The inversion results from these datasets using multi-bistatic measurement, which are obtained in the acoustic wave case and the pressure and vertically polarized shear (P-SV) wave case, verify the CSI algorithm with extended approaches is an accurate and promising method for elastic wave imaging.