bluuebunny/crossref_metadata_2025 huggingface dataset:
A Safety Monitoring Device for Firefighters Based on Wireless Localization Algorithm
Authors: Zhao Wang Da , Ding Wen Ting , Li Wei Gao , Ji Hua Yun
Published: August 2013

To solve the problem of firefighters casualties in fire fighting, a firefighter safety monitoring device based on wireless Localization algorithm is puts forward in this paper. The device consists of CC2430 wireless data communications module, MCU and O2, CO, temperature and smoke sensors. It has the advantages of higher reliability, low cost, remote wireless communications, real-time data acquisition and display, and higher localization precision. Therefore, it can reduce the risks of firefighters casualties efficiently.
Clustering Based on a Novel Density Estimation Method
Authors: Liao Li , Lu Yong Gang , Chen Xu Rong
Published: August 2013

We propose a novel density estimation method using both the k-nearest neighbor (KNN) graph and the potential field of the data points to capture the local and global data distribution information respectively. The clustering is performed based on the computed density values. A forest of trees is built using each data point as the tree node. And the clusters are formed according to the trees in the forest. The new clustering method is evaluated by comparing with three popular clustering methods, K-means++, Mean Shift and DBSCAN. Experiments on two synthetic data sets and one real data set show that our approach can effectively improve the clustering results.
A Multi-Gradation Stereo Matching Method Based on Edge Feature Points
Authors: Li Zhu Lin
Published: August 2013

A gradation stereo matching algorithm based on edge feature points was proposed. Its basic idea is: firstly edge feature points of image pair were extracted; then, gradient invariability and singular eigenvalue invariability were analyzed, two-grade stereo matching method was build, foundation matrix was solved further, and three-grade stereo matching algorithm was finished by foundation matrix guidance. The result indicates that the algorithm can improve matching precision, from 58.3% to 73.2%, it is simple and utility, and it is important for object recognition, tracking, and three-dimensional reconstruction.
Method of Harmonic Detection Based on the Wavelet Transform
Authors: Liang Qing Yang , Sun Zhe , Zhang Chen Fei
Published: August 2013

The harmonic current detection technology is one of the key technologies of active power filter technologies. The development of the harmonic current detection technology directly determines the development of the active power filter technologies. Based on this, this paper introduces some basis concepts of wavelet transform and analyzes its time-frequency localization properties, then, describes the harmonic detection methods based on wavelet transform in terms of program building, algorithm selection and wavelet function selection. The results show that the harmonic current detection methods based on wavelet transform are able to compensate the inadequacy of Fourier transforms and can achieve the functions of detecting the steady-state and time-varying harmonic current of the grid in harmonic detection of active power filter.
An Image Reconstruction Simulation Based on Prior Information for the Pulmonary Electrical Impedance Tomography
Authors: Yue Shi Hong , Zhang Jin Xin , Bao Xiu Juan
Published: August 2013

In electrical resistance tomography (ERT), one of the main reasons for poor quality of reconstructed image is ill-posed property of the inverse problem. In order to improve image quality, one of the feasible methods is to incorporate prior information. Based on conventional Tikhonov regularization method to reconstruct ERT image, the regularization matrix, combined with prior information vector, was proposed. The prior information included the structure property of human thorax, conductivity distribution information of organs and other dynamic information during the respiration process. The research results indicated that the proposed method can enhance the spatial resolution of the reconstructed images, and reduced the trail traces of the investigated objectives. It is promising in detecting and monitoring regional lung ventilation change by means of the ERT system with a proper imaging method.
Highly Scalable Flight Control Architecture for Small Autonomous Helicopter Using PC104/ARM Technology
Authors: Zhou Shu Xun , An Jie , Yao Jian Guo , Hu Fei
Published: August 2013

Autonomous helicopter flight presents challenges in flight control system design with scalability. In this paper, we present the integration architecture of hardware and software for the flight control system based TREX 600 helicopter. In order to enhance scalability, the flight control system uses the PC104 and the ARM which is exerted to process the measurement data, including the position, attitude, height etc. The flight control is developed based multi-loop decoupling PID control which is easy to be implemented. Finally, the flight control system is successfully verified in the actual autonomous flight control experiment.
Research on the Detection Unit and Control System of CNC Cool Frame Bender
Authors: Zhou Yong Qing , Wang Cheng Fang
Published: August 2013

Based on chord length measurement control method, the research on the key technology for the CNC cool Frame bender has been carried out. Detecting unit has been designed, and analyzing of the detecting objects, its range, parameters converting method are also described. Based on which the NC control system is developed, and also the method for the calculation control parameter and process of frame are described.
Fabrication of Ultrasound-Gravity Field Flow Fractionation Devices Using Engraving Machine and Reliable Sealing Method
Authors: Yin Hai Yan , Zuo Chun Cheng , Shi Hong Yan
Published: August 2013

In this paper, based on a coupled ultrasound-gravity approach, we present a new method to separate micro nano-particles and introduce a rapid and easy method to fabricate field flow fractionation (FFF) devices. Furthermore, with an emphasis on the study of equipment engraving and sealing process, we optimize the parameters of processing.
Short-Term Traffic Flow Forecasting of Intersection Based on Approximate Dynamic Programming
Authors: Li Xing Yi , Zuo Zhi Hong , Zhou Shuang Quan
Published: August 2013

In this paper, we propose a model for short-term traffic flow forecasting based on approximate dynamic programming when considering the influence of related roads. First, construct the system performance index using the error function as the objective function, adjust the action network online according to the minimum index to generate the approximate optimal control vector and the control matrix, then we can get the traffic flow data at the specific road and time to forecast. To illustrate how this method works, we use intersection traffic flow of Hongli road and Shangbu road in Futian Shenzhen as experimental data, which can be demonstrated that this method can increase the forecasting accuracy and meet the real-time forecasting requirements.
Semistability of Nonlinear Control Systems
Authors: Yu Qiang , Wu Bao Wei
Published: August 2013

The problem of semistability for nonlinear autonomous systems is investigated. We develop semistability and unsemistability theorems for nonlinear autonomous systems which is stable. These results of this paper are more tractable and practical for semistability of nonlinear autonomous systems than the existing results in the literature. Several examples are included to show that the proposed method is effective.
Design of a Novel Excitation Circuit for Low Perming Error Fluxgate
Authors: Cui Zhi Jun
Published: August 2013

An effective method for low perming error of fluxgates is to enlarge the peak value of the excitation current, but large amplitude excitation will increase the power consumption. A narrow pulse excitation current with sufficient peak value can reduce perming error with low power consumption while increase the difficulty of the signal processing with low sensitivity. The perfected excitation waveform with high ratio of peak value to RMS value by careful excitation tuning is an efficient solution. This paper presents a novel circuit which can generate an excitation current waveform with high peak value and low RMS value for fluxgates. Different from the tuned excitation circuit, the proposed circuit is a combination of an integrator and a differentiator with the same squarewave input. The excitation signal is the sum of a triangle wave and a sharp narrow pulse signal. It is easy to adjust the peak value of the narrow pulses for perming error study and no careful tune adjusting is needed. Finally, in case of the fixed peak value of the narrow pulses, an improved excitation circuit with only two resistors, two capacitors and one amplifier is also presented in the paper. The experiment results show that 0.5nT perming error can be achieved for 10mT shock.
Important Position of Information Science in Studying Complex System
Authors: Zhai Jian Hua , Han Jin Fang
Published: August 2013

This paper firstly describes the important position of information science in complex system and the relationship between them. And then by the detailed analysis, point out that the uncertainty of information is absolute and certainty is relative in the information age. the important significance on uncertain information research is emphasized. and a research relationship: uncertainty informationinformation sciencecomplex system is also established. Finally, that the research prospect, processing method and theoretical basis for uncertain information are proposed.
Study on Dynamic Services Composition of Web Services Based on BPEL
Authors: Gao Jin Yue , Huang Fei , Zhang Gong Xuan
Published: August 2013

From the core concepts of SOA (Service-Oriented Architecture) "Service" starting the service composition is discussed in detail, from the service relationships network modeling, services dynamic composition approach based on Business Process Execution Language BPEL (Business Process Execution Language) is proposed in this paper, meanwhile two concepts of service agent and service quality are described, which achieve the service process dynamic execution.
Simulation for Generate Efficient Evaluation Plans with Materialized Views
Authors: Chen Jia , Chen Hong Wei , Hu Xin Rong
Published: August 2013

We study the problem of finding efficient equivalent view-based rewritings of relational queries, focusing on query optimization using materialized views under the assumption that base relations cannot contain duplicate tuples. We propose efficient algorithm SRGP for finding approximate optimal rewriting. Our results apply not only to query optimization, but to all areas where the goals is to obtain efficient equivalent view-based query rewritings. Experiments show that our algorithm of generating optimal rewriting has good efficiency and scalability.
Mechanism of Ginsenoside Rh2 Inhibit Non-Small Cell Lung Cancer
Authors: Gao Han , Sun Yan , Yu Hai Tao , Zhang Chun Jing
Published: August 2013

To study function and relativity of autophagy in NSCLC treated with ginsenoside Rh2, and to explore some molecular mechanism that ginsenoside Rh2 induces A549 cell lines of NSCLC apoptosis. Methods: Immunofluorescence assays detects activity of caspase-8 / 9 and expression of autophagy-related molecules Beclin-1 and LC3. Results: Immunofluorescence assays shows that, 20μg/mL ginsenoside Rh2 acts 3h, fluorescent intensity that marks activity of caspase-8 and expression level of Beclin-1 significantly increases, it means that activity of caspase-8 significantly rises and expression level of Beclin-1 significantly increases. Fluorescent intensity that marks expression of LC3and activity of caspase-9 has increase but without significant change in 1-6h, it means expression of LC3 and activity of caspase-9 has no significant change. Conclusion: Ginsenoside Rh2 can adjust expression of membrane receptor pathway (caspase-8) and or autophagy related gene Beclin-1,then play the biological role of promoting apoptosis of tumor cell.
Rapid Detection of Mycobacterium tuberculosis Complex by Loop-Mediated Isothermal Amplification Combined with Chemosensor
Authors: Wang De Guo
Published: August 2013

Loop-mediated isothermal amplification (LAMP) allowed rapid amplification of nucleic acids under isothermal conditions. It can be combined with a chemosensor for much more efficient, field-friendly detection of Mycobacterium tuberculosis complex. In this report, LAMP was performed at 65 °C for 10 min, followed by a rapid reaction of DNA amplification by-product, pyrophosphate ion, with chemosensor resulted in red disappearance. The detection limit of Mycobacterium tuberculosis complex by LAMP-Chemosensor was 3-5 copies, and the total assay time including 10 min for rapid DNA extraction was approximately 30 min. Data on naturally contaminated raw milk samples indicated that the LAMP method was highly specific and sensitive, giving 100% concordance with Real-time PCR. The results showed that the LAMP-Chemosensor method had the advantages of better sensitivity and speed and less dependence on equipment than the standard (PCR) for specifically detecting low levels of Mycobacterium tuberculosis complex DNA, and this can be useful in the field as a routine diagnostic tool.
Effects of Propargyl Alcohol on Electrochemical Behaviors of AZ91 Magnesium Alloy Anode in 3.5% NaCl Solution
Authors: Yu Zu Xiao , Hao Shi Xiong , Fu Qing Shan
Published: August 2013

To improve corrosion rates and activation properties of AZ91 magnesium alloy anode, effects of additives (propargyl alcohol) on electrochemical behaviors of AZ91 magnesium alloy in 3.5% NaCl solution have been examined by studying corrosion rate, polarization, open circuit potential (Eocp) and transfer resistance values (Rt) of electrochemical impedance spectroscopy(EIS). The results show that propargyl alcohol not only decreases corrosion rate of AZ91 magnesium alloy anode, corrosion-inhibition ratio is 64.6%, but also increases activation properties of AZ91 when 1.0 % propargyl alcohol added into 3.5% NaCl solution. The current density of AZ91 reaches 9.46 mA.cm-2 at-1.35V. Its active potential (Eact ) is-1.527 V , and Eocp is-1.556 V.
Study on Thermal Analysis Kinetics of Carbon Support
Authors: Song Jun , Jian Wen Long , Wang Li
Published: August 2013

Actived carbon can be widely used as adsorbent, catalyst and catalyst support for many chemical reactions. At present, the research on thermal analysis Kinetics of actived carbon is quite few.Studing on it,is helpful for disclosing the decomposition reaction process and thermodynamic law of actived carbon. By thermal analysis, thermal decomposition Characteristics of actived carbon is studied. The TG and DTG eurves of actived carbon were obtain ed using multiple heating rate method.The test data were processed by iso-conversional method to obtain the kinetic parameters.The results showed that, with the improving of heating rate , the startimg reaction temperature of TG and the peak temperature of DTG shifted to the high temperature zone, postponement phenomena occurred.Based on the collected experimental data, it proved that had better linear relations with . The activation energy E of decomposition reaction of actived carbon, which was determined by measurements of slope, was 96.59kJ/mol. The plot of vs was drew and a straight line was obtained. .The mechanism function was defined as ,so according to the slope and intercept of the line,it can be obtained that n=3.585,A=40189.85984.
Overview on the Treatment Technology of Wastewater from Copper Mineral Processing (WCMP)
Authors: Zhao Shu , Pan Ji Ze
Published: August 2013

During the exploitation and utilization of the mineral resources, varieties of pollutants have been produced, which would impact the natural environment inevitably and bring many adverse effects to ecological environment and the human health. Its worth noting that the wastewater from copper mineral processing (WCMP) is one of the main source of mine environmental pollution. The WCMP is characterized by large quantity and containing large numbers of suspended solids, residual flotation reagents and heavy metals, etc. Wastewater can be discharged and realized reuse only after effective treatment. Recently, natural sedimentation, neutralization, flocculation, oxidation and other treatment techniques by wastes are the commonly used methods to treat the mineral processing wastewater.
Isolation and Characterization of a Bacillus flexus Strain Used in Alkaline Wastewater Treatment
Authors: Wang Xi , Zhao Hua
Published: August 2013

Biological treatment is one of the considerable choices for removing of organic pollutants present in petrochemical wastewaters. In this study, BS5, the isolate with the highest COD removal rate, was identified as Bacillus flexus, based on 16S rDNA sequences. Subsequently, the optimized COD removal conditions of BS5 were investigated. It was indicated that the optimal conditions were 35°C, pH 7.5. Under such circumstance, the removal rate of COD can reach 81.04%. The isolation of Bacillus flexus strain BS5 provided an alternative for the bioremediation of alkaline wastewater. Lastly, the study showed that consecutive disposal process may help to reducing COD of wastewater effectively.
Dehydrogenation of Sec-Butanol to Methyl Ethyl Ketone over Cu-ZnO Catalysts Prepared by Different Methods: Coprecipitation and Physical Mixing
Authors: Hu Yun Feng , Jiang Guang Shen , Cai Jun , Liu Jun Sheng , Deng Jun
Published: August 2013

Cu-ZnO catalysts prepared by coprecipitation and physical mixing methods were characterized to investigate the roles of ZnO by X-ray diffraction (XRD), N2O chemisorption decomposition and evaluated for the vapor-phase dehydrogenation of sec-butanol (SBA) to methyl ethyl ketone (MEK). ZnO not only could disperse Cu species, but also prevent Cu0 from sintering. Cu-ZnO catalyst by coprecipitation method exhibited excellent reactivity.
Investigation of Surface Nanocrystallization by Pre-Forceing Rolling Technology
Authors: He Jia Wu , Ma Shi Ning , Ba De Ma
Published: August 2013

For solving fatigue failure of surface on the metal parts, the Surface Nanocrystallization technology by pre-forceing rolling was developed. The feature and operaing principle of equipment were introduced. A nanocrystalline surface layer was fabricated on deposited layer by using pre-forceing rolling technology (PFRT) .The microstructure of treated specimens was characterized by using scanning electron microscopy and transmission electron microscopy. Experimental evidence showed, The obvious plastic deformation layer was observed, the thickness of deformation layer is about 15μm. A nanocrystalline surface layer was found after PFRT treatment. The grain size of equiaxed nanocrystallites with random crystallographic orientations on the top surface layer was about 10nm. Experimental analysis indicated the coars crystal in the surface layer could be refined into nanocrystalline by using the pre-forceing rolling technology, attaining optimizing surface structure of metal parts.
The Effect of Corrosion Inhibitor in Hydrofluoric Acid Medium
Authors: Wu Wei Ming , Li Ding , Du Hai Yan
Published: August 2013

The experiments were done to find some good corrosion inhibitors for mild steel in 5% HF solution by the method of weight loss and electrochemistry including polarization curves and electrochemical impedance spectroscopy (EIS). Results show that the thiourea, potassium thiocyanate, and hexamethylenetetramine have good inhibition effect for mild steel in 5% HF solution, especially potassium thiocyanate and thiourea. Their corrosion resistance was greatly enhanced in the presence of tested inhibitor. Thiourea is an anodic type inhibitor and its inhibition efficiencies up to 99.88% can be obtained. Equivalent circuit of the investigated system was suggested.
Research on Structure and Properties of Camel Wool
Authors: Li Hui Jun , Guo Ke Ke
Published: August 2013

Through the analysis of the structure and properties of camel wool, this paper has a more thorough understanding of camel wool and discusses the structure is how to influence on the properties, from the length, strength, fineness, crimp, fulling, moisture absorption, etc. There is very important significance on the application performance and product quality.
Synthesis and Properties of a Novel Polymeric Phosphate Flame Retardant
Authors: Yan Li
Published: August 2013

A novel polymeric phosphate flame retardant (PFR-P) was synthesized from 1-oxo-4-hydroxymethyl-2,6,7-trioxa-1-phosphbicyclo [2.2.octane (pentaerythritol phosphate, PEPA), POCl3 and bisphenol S. Phosphorus was bonded both in the main chain and in the pendant group of flame-retardant polymer molecule, reached a content of 13.1%. And sulfur content was 6.75%. The thermal stability was investigated by TGA, and the results showed that the initiative decomposition temperature was 334°C with 41.1% charring residue at 500°C under air. The high phosphorus and sulfur content contributes an excellent flame retardancy to PC/ABS without a considerable decrease of mechanical properties. It is a potential flame retardant for other polymer systems.
Magnetorheological Effect of NDI Polyurethane-Based MR Elastomers
Authors: Yang Xue , Shuai Chang Geng , Yang Shen Lin
Published: August 2013

The dynamic magnetorheological (MR) effects of 1,5-Naphthalene diisocyanate (NDI) polyurethane-based MR elastomers were tested by changing excitation frequency, excitation amplitude, magnetic strength, or preload. NDI polyurethane-based elastomers show high dynamic mechanical property, and were used as base material to prepare MR elastomers, whose mechanical performance and dynamic MR effect were tested. The results show that: (1) the prepared NDI polyurethane-based MR elastomers have high mechanical performance and MR effect; (2) their MR effect was reduced with the increase in excitation amplitude or preload, but did not change obviously with the increase in excitation frequency. Therefore, MR elastomer devices should be reasonably designed to maximize MR effect.
Study on Concentration Distribution of Nd2O3 in 3KA Rare Earth Cell
Authors: Zhu Wei Hua , Zheng Xin , Zhang Xiao Lian
Published: August 2013

Concentration distribution of Nd2O3 in 3KA rare earth cell was studied by a self-restraint sample instrumentation of high temperature molten salts. The results were shown that concentration of Nd2O3 in this system was less than 4%, and the concentration of Nd2O3 decreased from top to bottom on the portrait, but it would be increased a little bit in the bottom point, and the concentration of Nd2O3 would be gradually increasing from cathode to anode.
Study on Temperature and High Cycle Fatigue Evaluation of Heavy Duty Diesel Engine Cylinder Head and Improved Design
Authors: Jing Guo Xi , Zhang Ru Hua , Guo Chang Min , Li Peng , Wang Xiu Qiao
Published: August 2013

A synthesized simulation process was used to predicting temperature and high cycle fatigue (HCF) of cylinder head in this paper. Firstly, the temperature prediction model was built and calibrated by the test data, which ensured the rationality. The simulation result shows that the material thermal conductivity is very low and the position of the drilling holes near the deck is very high, and the thermal load was reduced effectively through improving the material conductivity and optimizing the structure design. Finally a fatigue life evaluation has been performed which shows the HCF safety factor is higher than the original design due to the temperature reduction.
Static Deformation of Precision Machine Tools for Large Scale Aspheric Components Manufacure
Authors: Liu Shi Long , Yang Shu Ming , Jiang Zhuang De , Xu Yu Kun , Wang Jin Long , Yuan Guang Tao
Published: August 2013

Large scale aspherical optical component plays an important role in National defense industry. It is based on the large size aspherical machine tools, so the stiffness and accuracy of the machine tools lead to the accuracy of the mirror directly. The tools consist of a turntable shaft and three linear axes including X/Y/Z axises. This paper analyzes a desirable arrangement of Y-axis linear motors so that the error of Y-axis produced indirectly can be minimized.
Research on Connecting Bolt Looseness Characteristic of the Tower Crane Body
Authors: Wang Ji Yong , Hao Long Long , Song Shi Jun , Song Lian Yu
Published: August 2013

The bolts loose of the main limb is very important for the research of tower crane. We have established a dynamic simulation model of tower crane and physical experimental model, and have got the top trajectory of the tower crane through the above two models. The results show that the trajectory feature presents introverted region, and with increases of the loose bolts degree, the trajectory exhibit certain regularity.
Statics Analysis of Integral Impeller Based on Finite Element
Authors: Zhu Li Da , Xu Shuai , Liu Wen Wen , Wu Ji Jiang , Shi Jian , Zhao Hai Feng
Published: August 2013

Aim at the problem of machining integral impeller, a method of using finite element theory to carry out the statics analysis of impeller in this paper is studied. The finite element model is established, and then the nephogram of the impeller stress, strain and total deformation are obtained. The result is attained: in the case of impeller rotation and statics load, the maximum of stress and strain occur at the root of suction surface, the maximum of total deformation occurs on the blade tip position of suction surface, while the maximum deformation position has not changed, which increases with the increasing of rotation and statics load. The data results provide a theoretical reference for the machining of integral impeller.
Integration of Process Routes Planning and Scheduling Based on Network Diagram and Ant Colony Algorithm
Authors: Su Ying Ying , Liang Di , Dong Hai
Published: August 2013

The integration method based on network diagram and ant colony algorithm was proposed to realize integration of process routes planning and scheduling. A model of multiple process routes and resource (MPRR) network diagram was built, which applied the network diagram expression and represented the precedence constraint relationship among operations and resource conditions. In the model, the workpiece, operation and machine were joined together as a basic optimization cell to realize concurrent and holistic optimization for process routes planning and scheduling. The combination of MPRR network diagram and characteristics of ant colony algorithm was developed for generating optimal process routes and scheduling project. An example was studied to illustrate the effectiveness of the strategy.
Optimization of Controller Parameters of Rudder Roll Stabilization Using Simplex Optimization Algorithm
Authors: Peng Xiu Yan , Jia Shu Li
Published: August 2013

Considering the problem of optimizing controller parameters for ship rudder roll stabilization when the closed-loop gain shaping algorithm is used to design the controller, a simplex optimization algorithm is proposed. Specially, integral of time multiplied by the absolute value of error (ITAE) criterion is proposed as the performance index for simplex optimization algorithm, and the controller parameters are optimized on-line according to the output of actual system. The optimization of controller parameters are realized by the simplex optimization algorithm, and the results show that the efficiency of setting the control parameters is improved and the roll amplitude is significantly reduced. In addition, the negative influence of rudder roll stabilization to yaw can be also reduced. This method of simplex optimization algorithm provides a new theory for rudder roll stabilization and establishes a theoretical foundation for the application in practical engineering.
Finite Element Analysis of Automobile Leaf Spring Bassed on Pro/E
Authors: Wu Na
Published: August 2013

Nunmerical analysis method was used to analyze multi-chip tapered leaf spring with the same area under vertical loads, in which the brick element of twenty nodes was used to model the spring leaves and the solid modeling using in ansys was modeled in 3D softwar. Each piece of nodes were coupled in order to simulate the leaf spring assembly process. The results of six modes analysis and static analysis could be the research basis for the further study of leaf spring.
Wing Structural Design of a High Altitude Long Endurance Solar-Powered Platform
Authors: Ji Zhe , Liu Bin , Xu Fei
Published: August 2013

The solar-powered platform has great application prospects with its unique characteristics of high cruising altitude and long endurance. This paper presents a high-aspect-ratio long straight composite wing structure. A 3D FEM model is used to study the mechanical performance of the wing under gust, by applying nonlinear analytical method. The wing optimization is focused on high stiffness and light weight. A wing structure of feasible strength and stiffness is obtained. Through analysis, several engineering conclusions are obtained. In addition, the instability features of the main spar are included as well.
A Study on the Design of Gear System in a Windlass-Anchor System
Authors: Kang Seung Hee , Park Won Ho , Kim Chae Sil
Published: August 2013

The windlass-anchor system is the equipment to use the anchor. The windlass-anchor system is composed by the gear system. The windlass should design to have the structural stability because the windlass is tolerated the weight of the anchor and the ship. In order to determine the structural stability, the stress analysis is performed and the optimum backlash is selected. In order to consider the vibration and the noise, the modal analysis is performed and the result is compared with the exciting frequency. If the result of stress is less than allowable stress, the optimum backlash what is the quiet and is good at the mobility is selected, and the natural frequency does not equal to the exciting frequency, the gear system has the validity of the design.
Study on Equivalent Constitutive Model and Optimization Design for Adapter of Submarine-Lunched Missile
Authors: Hu Jian Guo , Zhao Jie , Ma Da Wei
Published: August 2013

V-shape adapter is one of the most used hollow adapter in submarine-lunched missile, studying on influence of mechanical property of adapter on submarine-launched performance has an important significance. Firstly, mechanical analysis on V-shape adapter is done and the equivalent out-of-plane mechanical property of adapter is obtained. Secondly, the equivalent constitutive model is built and the user subroutine VUMAT is developed based on ABAQUS/Explicit, while the stability and reliability of the calculation results are verified. According to the requirements of adapter performance from submarine-lunched missile, optimization design for adapter is carried out. The results show that the equivalent constitutive model can simplify the simulation of adapter and shorten the engineering time in research, and the optimized adapter can have a good effect on vibration reduction and supporting based on some relevant conditions.
Three-Dimensional Line Frame Model Design and Realization of a Human Body for Clothing
Authors: Sun Xi Ying
Published: August 2013

The characteristic of human body shape is said specific body shape and structure characteristic of the way, it determines the method of different parts of the human body modelling. In this paper, the line frame model is proposed to set up the human body model, so it is according to one of several major parts of the cross section and longitudinal section contour line combination instead of mannequin, on the computer with three times bezier curve to approximate fitting body shape of line frame model, to realize the 2D pattern model to the 3D model transformation.
Development of the WW-1.65/7 Oilless Compressor
Authors: Zhu Yu Feng
Published: August 2013

The development was made about the WW-1.65/7 oilless compressor in order to meet market demand. The oilless lubrication of the compressor is obtained by using self-lubricating materials and grease lubrication bearings. The reasonable structure of the piston component, its perfect seal effect and long life are achieved by the exact design and correct assembly. The air-cool pattern and the full opened crankcase bottom make the compressor cooled better, the cost is low. By analysis and calculation, the important structure parameters are made that the speed is 800r/min, the radius-length ratio is 1/6.6 and the axial width of the guiding ring is 50mm, these provide the important guarantee for the run reliability and life of the compressor. The WW-1.65/7 oilless compressor has better properties, can run reliably and go into mass production already.
Finite Element Modal Analysis on 5500mm Heavy Plate Mill Rack
Authors: Zhang De Chen , Yao Xing Lei , Sun Yan Ping , Li Yuan
Published: August 2013

Aiming at the vibration problems in Anshan Iron 5500mm heavy plate mill production line, the mill frame vibration in the main parts is researched by using the computer aided design method and the analytical method. Using SolidWorks 3D design software for frame modeling, the model is imported into the ANSYS finite element software, then 5500mm heavy plate mill stand 12 order natural frequencies and natural vibration type is calculated; applying analytical method of the 12th band of vertical vibration the natural frequency is calculated, and the finite element results is analysed comparatively. This paper lays the foundation for the study of the vibration of the mill stand in the future, provides a theoretical basis for the dynamic design of the mill stand.
Study on Ring Shape Chain once Shaped Die
Authors: Liu Geng Wu , Liu Fang
Published: August 2013

The ring shape chain was shaped by twice shape at two set die at present technology of works. It should be improved in structure. At first, the bar, which was passed through a shaped ring, was orientation on the upper punch , and the elasticity upper punch and side pressure block were used in die, the bar was bended into U shape, then, the side pressure block will pressure the open ends of U shape bar , at last , a ring chain was shaped at the die. The structure of this kind of die is not complex, but, it can reduce a shape process and a shape die, also reduce a half labor time. This die has high dependability, simply use and has extremely extend value.
Measurement of Bulk Modulus and Study of its Impact on Transport Characteristics for Dense Paste
Authors: Li Na , Hao Xue Di , Jia Xuan Kai , Zhang Shuang Yu , Wu Miao
Published: August 2013

Dense paste is solid-liquid waste from industry production and sewage disposal process with high concentration and viscosity. It has large output, low utility rate and serious environmental pollution. While the engineering application of long-distance and large-diameter pipeline transportation solve the disposal of dense paste, the serious back-flow causes that actual throughput is far less than the theoretical. It is relevant to dense paste bulk modulus, which there has no related study. In this paper, we carried out a test on coal slime based on wave speed method theory. We get the bulk modulus by measuring the propagation speed of pressure wave in the pipe, and analyze its impact on actual throughput and effective stroke of piston.Verification shows that the scheme is feasible and provides reference for the further study between bulk modulus and transport characteristics.
Temperature Regulation for LED Lamps Using Fans
Authors: Choi Hyeung Sik , Shin Hee Young , Oh Ji Youn , Lim Tae Woo , Kim Yun Hae
Published: August 2013

A temperature regulation control for LED(Light Emitting Diode) lamp using a cooling fan was studied. An efficient temperature regulation scheme using fan wind at the lowest sound noise was studied. For the study, after measurement of the minimum sound noise of the fan and related temperature of the LED lamp through tests, experiments on temperature control of the LED lamp using the fan with various size of heat sinks was performed. Also, characteristics and relationship of heat sinks and fans are studied through experiments. To reduce the fan sound noise, a method of reducing the operation time with optimal size of the heat sink was studied.
Analysis of Gait Planning Method for Biped Robots
Authors: Sun Jun , Lu Ling , Chen Jun Qing , Jin Jiu Fu
Published: August 2013

Biped robots research is mainly concentrated on the control system development and doing simulation, cubic spline interpolation method is widely applied to pre-gait planning work. This paper analyzed the robots walking process and calculated the joint trajectory curves of a walk cycle by using spline interpolation and the quintic polynomial fitting means, verifies that the result obtained by quintic polynomial algorithm tends to be more ideal, it is conducive to maintain walking stability and find the optimal joint angles. The paper provides a theoretical basis for optimizing robots trajectory planning.
Measurement of Linearly Polarized Light Rotation Applied in Atomic Magnetometer
Authors: Liu Qiang , Sun Yu Dan , Huang Qiang , Zeng Xian Jin , Zhang Jun Hai , Sun Wei Min
Published: August 2013

The measurement of linearly polarized light rotation is the key technique in atomic magnetometer. It influences the sensitivity of atomic magnetometer directly. The basic principle of polarizer beam splitter detecting was analyzed. The ZF7 optical glass and solenoid were used to generate standard small angle based on Faraday effect. The signal of AC rotational angle was extracted by lock-in amplifier. The experiment proved that the method can measure 8×10-7rad small optical rotation. As the linearly polarized light rotation is 20mrad in atomic magnetometer, the signal to noise ratio reaches 25000.
Measurement and Protection of Human Body Electrostatic of Mobile User Terminal
Authors: Chang Tian Hai , Fu Meng Yao , Yin Pei Pei
Published: August 2013

This paper, on the basis of the electrostatic discharge test of mobile user terminals and electrostatic parameters measurement of human body, got electrostatic potential of human body in different condition. The results show that the main factors effecting human body electrostatic are environmental relative humidity, humans dressing, human activities and so on. Then error between the experimental measurement data and the theoretical analysis result are analyzed. Finally proposed some protective measures according to the harm of human body electrostatic to mobile user terminal.
Research on Intelligent Fault Diagnosis Methods of Armored Vehicles Electrical System
Authors: Wang Lu , Lu Gui You , Li Dan , Ding Guo Bao
Published: August 2013

For armored vehicles electrical system fault diagnosis of fault original data collection difficult situation, a new intelligent computing programs designed based on the fuzzy set theory and possibility distribution theory and fuzzy logic reasoning design, which realized the process of KA automatization through the combination of fault simulation technology and knowledge acquisition technology. The approach presented in this paper makes the work of knowledge acquisition (KA) engineer easier, and makes fast diagnosis fault location and fault reasons possible.
An Improved Weighted K Nearest Neighbors Algorithm for WLAN Localization
Authors: Ye Ming , Chen Yi Ke , Tang Dun Bing
Published: August 2013

For indoor location estimation based on Wi-Fi fingerprinting, how to reduce localization effort while maintaining high location estimate accuracy is of critical concern. The paper introduces a new approach Reward and Penalty Localization (RP-Loc) algorithm, which extends the classic WKNN Localization algorithm. The parameter of observable Access Point (AP) occurrence rate is added into the fingerprint database in the offline training phrase to increase the increase the anti-interference ability. The experimental results prove that the RP-Loc algorithm exhibits superior performance in terms of location accuracy and robustness.
Analyzing and Control of Surface Inclusion Defect of Hot-Rolled Coil
Authors: Lan Yin , Wang Yan Feng , Yang Zhi Zheng , Rao Jiang Ping , Hong Xia
Published: August 2013

This paper is considering the surface quality control of hot-rolled coil. Through analyzing patterns, distributing-regularities and components of surface defect of low-carbon coil of WISCO, got the conclusion that mould powder entrapment was the key factor that lead the defect’s occurrence. Based on discussing the mechanism of powder entrapment in mould, developed a type of high viscosity powder, optimized flow field of mould through modifying the structure of SEN, and improved other relevant process conditions, the incidence rate of this type of defect was under controlled effectively and the degradation rate of the coil caused by the defect dropped from about 4 percent to less than 0.2 percent at the end.
Filtering False Alarms for Static Detection of Array Bounds Violation via Weakest Precondition
Authors: Chen Jie
Published: August 2013

Array bounds violations are a bane of programming in most languages. Static analysis provides a powerful approach to detect such bugs, but it always suffers high rate of false alarms. We propose a local, demand-driven approach based on weakest preconditions propagation to filter false alarms for static detection of array bounds violations. A concrete example is presented to show that our method is effective.
Study on the Online Detection Technology of the Band Saw Equipment
Authors: Chen Guo Jin , Ni Jing , Liu Ting Ting , Chen Hui Peng , Xu Ming
Published: August 2013

Aiming at the lower automation, accuracy and efficiency of the domestic band sawing machine, this paper studies the real-time detection technology based on the sawing load, develops the digital control system of the constant power sawing with the micro-feed performance to improve the load imbalance of the band saw blades in the sawing process. The real-time detection technology based on the micro-deviation of the band saws trajectory is studied. The digitized deviation-correction control system of the band saws trajectory is developed with the fine-tuning performance of the saw stiffness to correct automatically the band saws trajectory. The weight-detection technology based on the scan reconstruction of the surface profile size is researched. The digital control system of the fixed weight sawing is developed to meet that the weight error of the sawed workpiece is fewer than 3%. That can improve the accuracy and efficiency of the band sawing machine and provide the foundation for the realization of the digital control of the band sawing machine.
Design of Portable Standard Speed Source
Authors: Zhou Hua Wen , Xiong Zhuang
Published: August 2013

This paper expounds the standard speed source in the automobile manufacturing, introduces structural principles of the standard speed source of free fall and oscillating, analyzes and calculates error factors of standard speed source equipments. Discovers a design of standard speed source, which is portable, reliable and satisfying in certain scope by using simple principles and structures.
A 1.25Gsps 0.35um SiGe BiCMOS Track and Hold Circuit
Authors: Hu Rong Bin , Zhang Xiao Ying
Published: August 2013

In this paper, a novel track and hold circuit in 0.35um SiGe BiCMOS process is presented. Compared to the traditional one, several improvements are made on the proposed track and hold circuit. At first, multistage architecture is used, which has better isolation. Secondly, a saturation protection circuit is designed into the track and hold circuit to prevent the NPN transistor from getting into saturation state. The simulation results show that the proposed track and hold circuit has a SFDR of 82dB and SNR of 76dB at the sampling rate of 1.25Gsps. Further simulation proved that the proposed track and hold circuit has better performances than the traditional one.
A System Controller Designed for Bi-PAP Noninvasive Ventilator with an ARM MCU
Authors: Yuan Yue Yang , Yang Chong Chang , Feng Pei
Published: August 2013

Being aim at designing a system controller used in the Noninvasive Bidirectional Positive Airway Pressure Ventilation (N-Bi-PAPV) and advancing this medical device to serve the respiratory patients who suffer from the OSAHS, COPD and etc, by using an embed ARM Microcomputer LM3S9B92, the system controller including its circuit diagram and embed software was designed in accordance with the request of Bi-PAP medical ventilator. And the ventilators critical parameters were clearly defined and ranged for this system. After testing in a spontaneously breathing simulator, this system controller may be used to control the ventilator performing function well.
Effect of Martensitic Transformation on the Plate Shape of the High Strength Steel during Roller Quenching Process
Authors: Li Da , Yang Chun Mei , Hu Jian Ping
Published: August 2013

The variation of the temperature, stress and deformation of the high strength steel was simulated by using MSC.MARC software. The effect of martensitic transformation on the temperature, stress and deformation filed was discussed. The results shown that, the equivalent stress of the plate along length direction is distributed uneven when considered the phase transition. The maximum deformation and the deformation along length direction of the plate are increased obviously when considered the martensitic transformation.
Channel Estimation Technique Based on Compressed Sensing
Authors: Hu Xiao Feng , Zhu Jian Lin
Published: August 2013

The traditional channel estimation method in the communication system is based on the multipath channel intensive assume, lead to the spectrum utilization is low, compressed sensing theory provides a new way to solve this problem. The basic theory of compressed sensing is introduced, the feasibility of compressed sensing applied to channel estimation is explored, a detailed analysis several reconstruction algorithm of the compressed sensing channel estimation technologies: MP algorithm, OMP algorithm, CoSaMP. Studies have shown that fewer pilot signal channel estimation method based on compressed sensing theory to achieve the estimated performance comparable to traditional methods, thus improving spectrum efficiency.
Study on Pressure Control for Water Supply System by Fuzzy PID
Authors: Wang Jin Hua , Zhang Hong Yan , Niu Jing Xia
Published: August 2013

This paper show a parameter self-adaptive fuzzy PID controller which was designed by using fuzzy logical rules, and the rules aiming at characteristics of constant pressure water-supply system such as nonlinear, multi-parameters and long time delay. The controller can online auto tuning PID parameters to select the appropriate control parameters, depending on the working conditions for effective control of the water supply system water pressure regulator. The simulation results show that the control system response quick, over regulation measurement and transitional time is greatly reduced, oscillation time shorten, and the system has strong robustness and good stability.
Study on Friction Characteristics in Micro-Cutting
Authors: Ding Hong Jun , Wang Xi Bin , Fu Hong Ge
Published: August 2013

Now there is not engough basic theory to explain the friction mechanism on the shear deformation zone and tool-workpiece deformation zone in the process of metal cutting.But the constant coefficient of friction model is not in accord with the actual cutting tool friction. So Friction law of micro friction process were studied by friction test and simulation, the friction model of micro - cutting are very important which can improve the micro-cutting mechanism, finite element modeling and Simulation of metal cutting process and etc.