bluuebunny/crossref_metadata_2025 huggingface dataset:
The Field Test of Solar House of Building with Altitude of 5000m in Tibet
Authors: Liu Wei , Liu Dan , Li Bai Yi , Zheng Min
Published: March 2013

Solar energy is a renewable energy source nearly in exhaustible and pollution-free. Tibet provides little normal resource, however it is abundant with the richest solar energy in our country. Many researchers spent a lot of time to improve the living standard of peoples who lived there by utilizing solar energy, which contribute a lot to the development of Tibet, however, few researches related on the solar house in buildings located above 5000m. The field measurement of a solar house built above 5000m was carried and its effect was presented and analyzed in this paper, which could contribute the study of solar house in the condition of extreme cold zone and low pressure environment.
Effect of Probiotics on the Growth Performance and Muscle Composition of Crucian Carp
Authors: Wang Chao Jin , Lai Xue Ping , Xie Jing
Published: March 2013

120 crucian carp were divided into 4 groups. Each group included two repeats with each of 15 crucian carp, and was fed with feedstuff mixed probiotics concentrations at 0.0%, 0.2%, 0.4%, and 0.6%. The figure index and viscera index were measured, and the nutrient compositions were analyzed after 32 feeding days. As a result, the best probiotics concentration is 0.4% on the increase of the weight gain and the nutrient compositions.
Study on Nano- and Microcrystallites in Urines of Uric Acid Stone Patients
Authors: Zhang Guang Na , Xia Zhi Yue , Ouyang Jian Ming , Kuan Li
Published: March 2013

The presence of crystallites in urine is closely related to stones formation. In this article, the components, morphology of nano- and micro-crystallites in urines of 20 uric acid (UA) stone formers as well as their relationship with the formation of UAstones were comparatively studied using X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The main constituent of urinary crystallites was uric acid. Their particle size distribution was highly uneven, ranging from several nanometers to several tens of micrometers, and obvious aggregation was observed. These results showed that there was close relationship among stone components, urinary crystallites composition and urine pH.
Study of Molecular Docking of Mu Opioid Receptor Agonist - Fentanyl and its Analogs Based on Docking
Authors: Liu Ming , Wang Lei , Liu Xiao Li , Hu Wen Xiang
Published: March 2013

The interaction mechanism of a series of fentanyl analogs are examined using molecular docking to the mu-opioid receptor based on Surflex-Docking. Fully automatic flexible molecular docking (Surflex-Docking) was performed by using the possible active conformations of 70 fentanyl analogs and optimized 3D structure of mu-opioid receptor. The site mainly consist of residues ILE 109, ASP 112, TYR113, MET116, HIS262, TYR291. All these residues take part in interaction between fentanyl and mu-opioid receptor. Meanwhile, the results provide new insight to design of experiments aimed at understanding the structure.
The Effect of Related Parameters on the Gear Deformation in Oil Quenching
Authors: Wang Yan Feng
Published: March 2013

This paper introduces the effect of quenching parameters on deformation of gear by oil quenching gear. These influences have relationship with many factors. By comparing and evaluating the main influence factors, provide basis for choosing the best carburizing and quenching process.
The Application of PVA Antibacterial Film with Clove Oil/β-Cyclodextrin Inclusion Complex in Fruit Packaging
Authors: Hao Xi Hai , Jiang Ping
Published: March 2013

In this paper, the PVA film with clove oil/β-cyclodextrin inclusion complex was used to package cherry tomatoes Experiment on cherry tomatoes showed that weightless rates increased along with time, and sensory equality score of cherry tomatoes began to decrease sharply in the 2nd day of storage. PVC antibacterial film had a controlled effect weightless and sensory change obviously, when the clathrate adding is 15%, the effect was the best.
Optimization of Co-Culture Condition for Lactobacillus delbrueckii subsp. bulgaricus with Weak Post-Acidification Ability and Streptococcus thermophilus
Authors: Liu Fei , Jiao Yue Hua , Huo Gui Cheng
Published: March 2013

To obtain high quality yoghurt starter with low post-acidification, the characteristics of mixed fermentation of yoghurt strains were studied. Lactobacillus delbrueckii subsp. bulgaricus KLDS 1.9201-11 with reduced post-acidification and Streptococcus thermophilus KLDS 3.9210 were cultivated in 2.5L fermenter with different culture temperature, initial pH and proportion of inoculums, and of which reproductive activity and ratio of viable cell count were compared. It was beneficial for the balance of final ratio of viable cell count between starter strains at the end of fermentation, when grew at 42°C, pH6.2, and the proportion of inoculums of Lactobacillus delbrueckii subsp. bulgaricus KLDS 1.9201-11 and Streptococcus thermophilus KLDS 3.9210 was 2 to 1. These results showed that different culture conditions could affect symbiotic growth of yoghurt strains, and different growth mode was an important prerequisite for collaboration growth of mixed strain and acquisition of yoghurt starter with high quality.
Study on Influence of Back Angle on Human Body Pressure Distribution
Authors: Chen Hao , Song Hai Yan , Zhang Jian Guo , Wang Fang
Published: March 2013

Through the study of the seat size parameter change on the body pressure distribution effect, the powerful references to comfort design of office chair were explored. By using Canadian XSENSOR X3 PRO V6 test system, human body pressure distribution and subjective comfort evaluation in different back angle of 6 objects were tested. The data were processed by statistical analysis software SPSS 16. Then the change of maximum pressure, average pressure, contact area of seat surface and backrest, as well as the vertical pressure distribution curve with the back angle were obtained. Finally the comfort indicators of daily office chair were determined based on body pressure distribution, and the most comfortable back angle of office chair were also solved. Thereby it can provide reference for those who want to design comfortable daily office chair.
Nozzle Spraying Model of Combustion Thermal Spray
Authors: Guo Wen Liang , Guo Zheng
Published: March 2013

The flame used in combustion flame spraying is typical of a high-temperature free jet. The flow fields of free jets are multi-phase flows that couple the mass and heat transfer. The analytical and numerical solutions to turbulent flows are engineering approximations. This work uses Prandtle’s mixing-length theory to describe the flame spreading of free combustion spray jet and uses nozzle spray model to describe the distribution of the powder particles sprayed from powder nozzle to the substrate surface. The nozzle geometry and the parameters determine the distribution of the powder particles. The nozzle spray model has the same physical meaning with the jet spreading angle. Experimental measurements were carried by a high-speed CCD camera.
Research and Practice of Open Experiment on PHYWE
Authors: Liu Wen Li
Published: March 2013

This paper introduces the research and practice of the independent opening experiments on PHYWE platform, provides some idea and methods under taking into full account linking university physics experiment and independent opening experiments. It is not only improve students’ ability of practice, analyzing and solving problems but also develop students’ creative thinking and increase their experimental ability. It provides the convenient to students and provides the chance to students of review and makes innovation. A free and open physics laboratory has been become the best second classroom of students. The ideas and methods are very features and innovation. It is to be worth promoting.
Study on Problems and Countermeasures in Practice Teaching of Undergraduates in Mechanical Industrial Design Major
Authors: Jiang Xiao Wei , Cheng Xian Chun
Published: March 2013

Aiming at the problems existing in practice teaching of undergraduates in mechanical industrial design major in college, a series of countermeasures has been raised, like paying more attention to practice teaching, increasing the proportion of practice teaching, innovating the content of practice teaching, adjusting the major curriculum, building a scientific and reasonable team of teachers, and updating the equipments for practice teaching. And on this basis, a summary is given on the problems and countermeasures in practice teaching of undergraduates in mechanical industrial design major.
The Scientific Picture of the World as a Basis of Nanoelectronic Engineer’s Professional Competence
Authors: Gnitetskaya Tatyana N. , Afremov Leonid L. , Ivanova Elena B. , Karnauhova Elena V.
Published: March 2013

The article’s object is to analyze the content of one of the main nanoelectronics engeneer’s competence as an ability to conceive the scientific picture of the world, and provide conditions for students, future nanoelectronics engineers, to develop it. We discuss a content of the scientific picture of the world, its structure. We introduce a definition of the information picture of the world; suggest a method of structuring the physics course on the basis of distinguishing the object of research that does not break integrity of the physical picture of the world as a main part of the scientific picture of the world.
The Study of Engineering Geology Teaching Based on the Creativity Thinking Training
Authors: Shang Min , Yi Wu , Xu Qiang
Published: March 2013

This article analyses the characteristics of the engineering geology and engineering geological thinking connotation: geological evolution thinking, geological structure thinking, the combination thinking of geology, engineering and the environment, and systems thinking, discusses the relation of engineering geological thinking and innovative thinking (associative thinking, integrated thinking divergent thinking and systems thinking). The analysis and discussion fits to the current higher education requirements of innovation capacity. It comes to a conclusion that practice of engineering geology teaching can gradually develop correct professional thinking and completes the transformation the professional thinking and innovative thinking. At the same time, the students can grasp professional quality and master the entire engineering geology field of thought patterns and characteristics by the teaching. So the teaching can build the solid foundation that they can become high-quality engineering geology workers with the truly innovative ability.
Discuss about Fast Response Performance of under-Damped Second-Order System in Time Domain
Authors: Wang Yuan Sheng , Lu Gui Ying , Yu Juan , Li Bo
Published: March 2013

Influence of the damping ratio on the response fast performance to under-damped second-order system in the time domain has been discussed. The relationship between peak time and the input signal, the adjust time, and the system type has been analyzed. The response’s fast performance indicators are relative, and it is related to the input signal, the response of the system, and the type of system and its initial states. In conclusion, the peak time and the adjust time cannot reach a minimum at the same time. The fast response issue must be discussed in relation to specific cases, and it cannot be generalized.
Competency Models Utilization in Industrial Enterprises
Authors: Krajčovičová Katarína , Cagáňová Dagmar , Čambál Milos
Published: March 2013

The paper focuses on the issues of managerial competencies and the competency model in industrial enterprises. This paper deals with the theory of knowledge processing and its role as a theoretical basis for knowledge development in the area of managerial competencies. Managerial competencies, however, are becoming one of the key building blocks in the success of companies in terms of achieving both their mission and vision in adding value and improving business performance, and especially in the enhancement of the development of their own employees. A managerial competency is more than just knowledge and skills. It involves the ability to meet complex demands, by drawing on and mobilising psychosocial resources in a particular context. While skills and knowledge are part of a manager's competency, that can be measured fairly easily, intangible assets like effective communication and teamwork, while essential, are harder to pin down and evaluate. In the following parts of this article the concept of the competency model has been explained. A competency model organizes the competencies needed to perform effectively in a particular work setting.
Freeway Environmental Risk Assessment and Countermeasures
Authors: Pu Ji Sheng , Wei Lang , Zhu An Min
Published: March 2013

In recent years, various types of unexpected environmental accidents occurred frequently in China, which had caused great harm to economy and social development of China. The environmental risk assessment (ERA) model was built based on the related factors was described. Take the case of the proposed project of Cangzhou-Qiantongzhen freeway, the environmental risk was assessed by ERA model, and the corresponding countermeasures and emergency plans were put forward in the construction and operation period. The results show that the probability of water pollution in the sensitive sections along the freeway is 0.000927 to 0.011563times per year.
Relative Structure on Main Influence Factors of International Trade of New Energy Materials
Authors: Xue Wei Xian , Guo Rong
Published: March 2013

All domestic and foreign literatures on influence factors of international trade of new energy materials are statistically analyzed by using Meta-analysis method, and fourteen main influence factors are identified and extracted from previous research results. After that, the paper analyzes the relative structure among the fourteen factors by using interpretive structural model. The results show that export subsidy for new energy materials, import subsidy for new energy materials, insure subsidy, export drawback, export exemption, decreasing tariff for import, discount loan, import & export surety and revenue growth are superficial and direct influence factors; support fund growth, export tariff growth and import tariff growth are intermediate and indirect influence factors; interest of payment for import goods and interest of payment for export goods are essential and basic influence factors. This analysis is helpful to open out effect system and mechanism for international trade of new energy materials.
Developing Equipment Manufacturing Industry Based on Service-Oriented Manufacturing
Authors: Yang Li Xi , Zhou Xu Fang
Published: March 2013

Service-oriented manufacturing is an advanced manufacturing mode focused on integrating service with manufacturing. The remarkable importance is known to be strongly associated with the development of service-oriented economy in the period in which China transfers the traditional equipment manufacturing industry to the service-oriented manufacturing. We take a close insight into basic theories of service-oriented manufacturing, and then we analyze the characteristics, profiles, as well as the present situation of the equipment manufacturing. Finally, we propose some countermeasures for transferring the equipment manufacturing to the service-oriented manufacturing from the views of the aggregation mechanism, the network of innovative mechanism and manufacturing value-added chain.
One-Piece Flow Implementation Research in the Garment Enterprises
Authors: Hu Luo Yan , Huo Ya Rui , Jin Chang Qing , Zheng Yan , Zheng Qian , Xu Yan Yan
Published: March 2013

One-piece flow is one of the effective tools of lean production. Many garment enterprises expect to implement it in their own enterprises, but a lot of difficulties exist in the implementation process. In this paper, it takes an example of a well-known processing enterprise and to study the one-piece flow implementation process of a pair of jeans pipeline. By nearly a year of tracking and research, the paper systematically summarizes the pre-production preparation and production maintenance in the implementation of the One-piece flow. It demonstrates in detail on how to achieve the improvement of the hardware, software and personnel in order to reach the requirement of one-piece flow. Then, it systematically discusses the wage system of one-piece flow and will provide a theoretical and practical basis for the implementation of a single-piece flow production.
Three-Dimensional Modeling Design on Multifunctional Office Chair for Fitness on Solidworks
Authors: Li Qing Quan , Wu Hai Tao , Liu Hong Bin , Liu Jie
Published: March 2013

Established the model of multifunctional office chair for fitness, using 3D modeling software Solidworks, finished the 3D model of parts and parts assembly according to the design requirements of multifunctional office chair, visually and efficientlly. Importantly, this chair is the combination of fitness and massage function. So it is practical and cnvenient to the office crowd.
Parametric Finite Element Analysis of the Shipyard Lifting Lug Based on VB and ANSYS Interface
Authors: Lin Shao Fen , Chen Qing Lin , Zhu Zhao Yi
Published: March 2013

The software compiled by VB had good visualization and the finite element analysis of ANSYS was a rapid, precise and effective method, both of these advantages were combined by the interface technology between VB and ANSYS. Through parameterizing the structure, material and load of the lifting lug, a friendly human-machine interaction interface was developed in this paper. This software improved shipyard's engineering designers work efficiency at all levels, the safety of hull block turn-over and lifting was improved too.
The Design on Automatic Feed Punching Mechanism on SolidWorks
Authors: Duan Xiao Bin , Wu Hai Tao , Liu Hong Bin
Published: March 2013

Established the model of automatic feed punching mechanism by using 3D modeling software SolidWorks, we finished the 3D model of parts and parts assembly according to the design automatic feed punching mechanism’s requirements. This design based on the double-crank seven-bar mechanism as pressing mechanism and cam mechanism as feeding mechanism, completed the combination of pressing mechanism and feeding mechanism and the automation of the mechanism.
Optimization Design and CFD Study of Nature Gas Engine Inlet
Authors: Jiao Yun Jing , Si Peng Kun , Zhang Zi Li
Published: March 2013

By adopting CFD numerical simulation software, the steady numerical simulation of original engine inlet is carried on. On base of the original one, two new inlets are redesigned and their velocity fields are analyzed. From the simulation of CFD, we can learn that with the different inlet, the average flow velocity increases when the swirl ratio rises in same cross-section. Then the experiment of inlets with different geometry is carried on. Considered various kinds of performance of the engine, we found that the swirl ratio which is generated by the inlet should not be too high, but it also is not good with too low swirl ratio. In this investigation, comprehensive consideration of economy and power, the no.1 inlet is selected as the best one for the next study.
Simulation Research on Undercutting Properties of Involute Gears Based on VB
Authors: He Jia Ning , Gao Yong , Zhang Hai Bin , Zhang Chao , Deng Xu Lei
Published: March 2013

Establishing the corresponding relationship between radius at tooth tip and tooth root fillet by the curvature of conjugate flank based on the generating method to manufacture for gears. According to the Visual Basic, a 2-D mathematical model of relationship between undercutting phenomena and modulus, teeth and modification coefficient of involute gear was built, and then simulated undercutting influence level caused by modulus, teeth and modification coefficient. The generating method dynamic processes, generating profile and the root drawing obtained by the simulation will directly reflect the influences that modulus, teeth and modification coefficient with gears meshing processions, and provided a reliable basis for design gear transmission and machining involute gears.
Rigid-Flexible Hybrid MBD Based Modeling and Simulation Method for Coupler Mechanism
Authors: Qu Bao Zhang , Lu Bi Hong , Huang Jian Song , Liu Yu
Published: March 2013

The coupler mechanism is a key component of vehicle connection. The geometric shape of parts are very complex. Between the working parts there is a certain clearance, and mechanism function is implementated by the collision contact of these parts. So, it is very difficult to analyze how coupler works exactly. The RecurDyn software, the latest research results of multi-body dynamics (MBD), is used for modeling and simulation. The working state of the coupler device was reproduced in the software. The modeling and simulation of coupler irregular mechanism was created by using the rigid-flexible hybrid MBD system. Through the simulation results, including main parts parameter curves about mass centre motion, force curves on the joints, contact force between parts, and key components stress concentration area as well, the functional reliability and the structural reliability of coupler were analyzed in operating environment. Applying the MBD theory and technology above, the structural and functional reliability can be predicted for coupler liked complex mechanism.
Performance Study of Heat Exchangers with Continuous Helical Baffles on Different Inclination Angles
Authors: Song Su Fang
Published: March 2013

The three-dimensional model of heat exchangers with continuous helical baffles was built. The fluid flow dynamics and heat transfer of shell side in the helical baffled heat exchanger were simulated and calculated. The velocity, pressure and temperature distributions were achieved. The simulation shows that with the same baffle pitch, shell-side heat transfer coefficient increased by 25% and the pressure drop decreases by 18% in helical baffled heat exchanger compared with segmental helical baffles. With the analyzing of the flow and heat transfer in heat exchanger in 5 different inclination angles from 11°to 21°, it can be found that both shell side heat transfer coefficient and pressure drop will reduce respectively by 86% and 52% with the increases 11°to 21°of the inclination angles. Numerical simulation provided reliable theoretical reference for further engineering research of heat exchanger with helical baffles.
Modeling and Simulation of Valve Port in Non-Circular Opening Spool Valve
Authors: Huang Hao , Sun Zhong Wei , Li Xiong
Published: March 2013

With the application of FLUENT, in the inner flow field of the non-circular opening spool valve, the three-dimensional steady-state model was simulated at different valve port opening. The numerical simulation and visual analysis of the aboved flow field was carried out. In the valve port, the mass flow simulation value was compared with the calculated value. Then the relations of the valve opening size and speed, pressure and valve port flow characteristic of the flow field could be abtained. This method is helpful of analysis to different valve port structures, and plays an important role in the improvement of hydraulic valve performance.
The Optimization Design of Spindle Box for Large Friction Welder Based on the Sensitivity Analysis
Authors: Feng Rui Cheng , Xu Hao , Rui Zhi Yuan , Li Hai Yan , Zhou Bao Cheng
Published: March 2013

Focusing on the problem of accuracy machining to the friction welder,taking the spindle box of friction welder as the research object,the finite element simulation software of ANSYS workbench is applied to the static analysis of the box ,then the stress and strain response can be available. And through the using of sensitivity analysis optimization scheme is proposed ,which prerequisite basis is obtained for the optimization design and the improvement of breed to the spindle box of large friction welder
Analysis on Mechanical Characteristics of Flexible Membranous Disc Coupling
Authors: Yang Shang , Yuan Hui Qun , Li Yan
Published: March 2013

Using the basic finite element theory, 3D finite element models of flexible membranous disc coupling with different disc thickness is built by ANSYS ，and then the dynamic characteristics are analyzed in working conditions. In particular, the analysis of static stress and harmonic response to the thickness of 0.85 model is done for getting the stress variation under a rated condition. The date calculated by dynamic characteristics and stress analysis can satisfy the design requirements. Those researches and analysis provide a theoretical consideration for complex vibration situation of flexible membranous disc coupling and for the improvement and optimization of coupling product.
Research on Configuration-Complete Dynamic Modeling of Metamorphic Mechanism Based on Screw Theory
Authors: Hu Sheng Hai , Wang Hong Guang , Liu Xiu Lian , Zhang Xiao Dong
Published: March 2013

Kane dynamics equations of metamorphic mechanism based on screw theory is built, and the constraint equation with cut-off joint is completed by introducing exponentials formula. The configuration-complete dynamics equations of metamorphic mechanism is established with this two equations combined. The configuration-complete dynamics equations of the metamorphic mechanism in cutting machine for complex-surface is built using this method.
Matching Design and Simulation of Powertrain Parameters for Electric Vehicles
Authors: Gong Xian Wu , Wu De Jun , Ma Jian
Published: March 2013

This paper is aimed at developing a design methodology of powertrain parameters matching for electric vehicles. The vehicles’ dynamics were studied in an attempt to find an optimal torque-speed profile for the electric propulsion system. This study reveals that the motor peak-power characteristic is associated with acceleration and grade ability of vehicles, and the motor rated-power characteristic is related with maximum vehicle velocity. Powertrain parameters of a model vehicle were also designed through theoretical calculation and simulation. To reduce the vehicle mass, a fixed gear ratio transmission is adopted, and the transmission ratio was optimized aimed to improve the energy efficiency. The simulation with chosen driving cycles indicate that parameters matching of the vehicle powertrain are reasonable and can meet the design specification of vehicle power performance and driving range capability.
A Spatial Correlation Based Data Aggregation Algorithm for Wireless Sensor Networks
Authors: Wang Lei Chun , Zhou Guo Yu
Published: March 2013

Data aggregation is the important method to reduce data traffic and lower energy expenditure in wireless sensor networks (WSN). This paper analyzes the characteristics of data sampled by nodes, and gives the method to decide spatial correlation between neighboring nodes and the criteria to classify and decide data in WSN. On the basis of this, this paper proposes a spatial correlation based data aggregation algorithm for WSN, SCBD. SCBD classifies and decides data according to data criteria and spatial correlation among nodes in normal nodes and cluster heads at the same time, and then aggregates different types of data. The results show that SCBD outperforms RAA in terms of energy consumption, rate of data detection and quality of data aggregation.
Ethanol Sensor Based on Microring Resonator
Authors: Chen Yao , Ding Yu Li , Li Zheng Yu
Published: March 2013

Chemical sensors is gaining long-standing interests due to their applications in many areas such as bacterial and virus detection, medical diagnostics, drug development, food safety and environmental control. Among the existing chemical sensors, optical planar sensors show promising and attempt to beat their commercialized competitors because of their robustness, lable-free detection mechanism, mature complementary metal oxide semiconductor (coms) fabrication technology and naturally low cost. Silicon nitride microring resonators were demonstrated as chemical sensors. Using the technique of coms technology, the microring devices were fabricated with 200 µm in radius. Performance of the devices was measured, which showed the quality factor (q) was up to 25,000. Sensitivity of 108.9336 nm per reflective index unit (nm/riu) and detection limit of 1.836×10-4 riu were demonstrated by using various concentrations of ethanol solution as analytes.
Heterogeneous Convergence Model of Intelligent Perception Network Using Fiber Optic Sensing
Authors: Zhang Fan , Zhou Zu De , Xu Wen Jun
Published: March 2013

Fiber Bragg Grating sensor network plays an important role in the field of large-scale engineering and major equipment condition monitoring and diagnosis. The heterogeneous convergence between FBG sensor network and the Internet constitutes the FBG sensor network of Things which can future expand the network applications range and enhance the condition perception and monitoring capabilities. In this paper, the heterogeneous convergence model between FBG sensor network and the Internet is built. Based on the model, heterogeneous convergence principle and method between FBG sensor network and the Internet is introduced from three layers: perception layer, convergence processing layer and application layer. According to the theory and method, a condition monitoring and fault diagnosis system for the harbor machinery in the WAN environment is presented. The system physical running effect in the working field demonstrates the effectiveness and the rationality of the convergence method.
Design of Microcontroller System for Surface Scanning of Micro-Steel Ball
Authors: Song Ruo Feng , Wu Qian Qian , Yang Qian Ming
Published: March 2013

Based on the detection requirements of surface and sub-surface of micro steel ball, control system of defect scanning is studied, aiming at the problem of unfolded surface of steel ball, STC89S52 microcontroller is considered as the control core, then the feasible method of speed and direction control of step motor that driven by detection device, and hardware interface circuit and design of software solutions of the system are put forward, principles of unfolded surface of steel ball and control system of defect scanning and signal about defect scanning are analyzed, then the result are verified valid through the experiment. The results indicate that unfolded mechanics could be driven and flawed steel balls could be detected by the system of surface scanning of micro steel ball, which meet the design requirements.
Study of Rapid Calibration Method of Angel of Attack Sensor and Error Impact on Flight Control System
Authors: Li Dao , Yang Wei , Yang Zhao Xu , Li Jian Ping
Published: March 2013

The current calibration methods of combat aircraft’s attarck angle sensors are too complex and have some insufficiencies. According to the detailed design requirements of flight control system，a method combined with linear fitting and neural network identification is proposed, which can calibrate the measure data of the attarck angle sensors qucikly and accurately. The method proposed avoids the disadvantages of traditional interplation method， improves the computating efficiency, and ensures the the flight control system’s fault-tolerant ability. A simulation on flight control system with this calibration method was carrid out, which validated the precision and dependability of the method. The method can also deal strong nonlinear data quickly.
Design of Meteorological Monitoring System for High-Speed Railway
Authors: Yang Chang Song , Zhou Wang Ping , Wang Qi
Published: March 2013

Meteorological disasters seriously endanger bullet trains running in high speed, so this paper puts forward a design of meteorological monitoring system for high-speed railway (MMSHSR). The system monitors meteorological disasters to ensure bullet train to run safely and efficiently. Consisting of automatic weather stations (AWS), GPRS network, Internet, monitoring center, LAN, etc., this system automatically collected meteorological parameters, sent them to the GPRS network by the GPRS module. Receiving terminal received these parameters and sent to the monitoring center, which processed these parameters, sent them to railway departments through Internet which managed the train operation according to these parameters, to improve the traffic safety and efficiency. The paper discusses in detail the overall design, AWS hardware design and the system software design.
Research on Numerical Calculation Method to Aerodynamic Noise in High Velocity Environment
Authors: Zhang Li Jun , Chen Xiao Jiao , Li Min , Fan Yue , Fu Qiang
Published: March 2013

At present, the flight velocity and flight performance of an aircraft are higher, so that aerodynamic noise caused by an engine jet in the take-off and flight processes can reach 160 dB. The high strength of the jet aerodynamic noise is very harmful to vehicle drivers, vehicle structures and airborne equipments. Two numerical calculation methods to aerodynamic noise, the FW-H acoustic analogy method and the FW-H acoustic analogy and boundary element combining method, were introduced. These two methods were used to predict the aerodynamic noise, and the numerical calculation results were compared with the physical experimental results. Results show that the FW-H acoustic analogy method can predict aerodynamic noise. However, it cannot predict the sound field distribution. The FW-H acoustic analogy and boundary element combining method is able to predict the sound field distribution with sound reflection.
Experimental Investigation of Piezoelectric Bimorph Cantilever on Vibration Energy Harvesting Performance
Authors: Gong Jun Jie , Xu Ying Ying , Ruan Zhi Lin , Dai Long Chao
Published: March 2013

The bimorph piezoelectric cantilever model for vibration energy harvesting was established to analyse its natural frequency and generating performance according to Euler-Bernoulli theory. The influence of the length and thickness of piezoelectric cantilever on natural frequency and generating voltage was discussed by computing the cantilever equivalent stiffness. Experimental investigation was performed to measure its natural frequency and output generating voltage of bimorph piezoelectric cantilever, and the effect of cantilever with different proof mass and structural parameters on generating performance was also analysed. Theoretical results of bimorph piezoelectric cantilever are compared with experimental results qualitatively, good correlations are observed.
Structural Design and Testing of a Butterfly Piezoelectric Generator with Multilayer Cantilever Beams
Authors: Ruan Zhi Lin , Gong Jun Jie , Cai Meng Chang , Huang Bing
Published: March 2013

In order to solve the inconsistent problem of multi-layer connection and vibration in each layer, a butterfly piezoelectric generator with multilayer cantilever beams is designed. The generator is mainly constituted by butterfly multilayer cantilever beams and mass subassembly two parts. Physical devices of butterfly generator and typical piezoelectric cantilever are fabricated respectively. The experimental setup is also put up for the testing of resonant frequency and output voltage. It can be found that each layer of multilayer generator has a similar output voltage and resonant frequency to the typical one with same geometric and material parameters. So each layer in butterfly piezoelectric generator can be simplified as a typical cantilever beam for researching and analyzing.
Nanostep Fabrication Using FIB Technology
Authors: Wang Chen Ying , Yang Shuming , Lin Qi Jing , Jiang Zhuang De
Published: March 2013

The accuracy and traceability of measurement at nano-scale are directly related to nano-fabrication. Nanostep is typical structure, so the measurement and characterization of nanosteps are important to improve the accuracy of nano-fabrication. This paper studies on the relationship between the morphologic features of nanosteps and the processing parameters of a dual beam Focused Ion Beam (FIB). Nanosteps are fabricated with different depth of 50nm and 30nm. The experimental results show the depths of the nanosteps are affected by the sequence of the process and the processing energy. Although the relationship between the depth and process duration is linear, the depths of the nanosteps are not consistent with the design. The dimensions of the nanosteps at different positions are not constant because of the varying slope of the bottom and sidewall. It is necessary to optimize the processing parameters to achieve the designed dimensions.
Femtosecond Pump-Probe Investigation of Ultrafast Phenomenon of GaAs
Authors: Yuan Dong Qing
Published: March 2013

The effect process between femtosecond laser and matter had been introduced first. Then introduce the theory of strain pulse and the experiment set up.We detect transient reflectivity change on surface of GaAs at different delayed time using femtosecond transient reflection spectroscopy.We found it was made up of three parts: original scattering process of 100fs, carriers-lattice thermal equilibrium of 1.5ps and recombination process of 500ps.
Aircraft Wing Deflection Measurement Based on PLC Control System Design
Authors: Wu Da Wei , Su Dongdong , Li Jian
Published: March 2013

With the domestic aircraft to continuously improve the level of production, digitalization and automation of airplane ground test adjustment technology is transforming it into a requirement, flight test technology will move towards digitization, Integrated ,and commom direction of development. Automation of aircraft wing deflection measurement platform through the development of PLC control system experiment and pc with experimental realization of the process control and real-time monitoring, Established a complete set of data acquisition channel, Promote the development of aircraft wing deflection angle of automated measurement technology.
Research on Geometric Dimensioning Automatic Detection of Tubular Member
Authors: Yao Jin Jie , Yang Jing , Wang Li Ming , Han Yan , Bai Pei Rui
Published: March 2013

Geometric dimensioning measurement is a very important application in metrology. In this paper, we focus on the geometric dimensioning automatic detection of tubular member based on the laser displacement sensor. An automatic detection system of tubular member is designed using line laser scanning principle. The system includes base, swivel table, servo motor, motor driver, servo pack, motor controller, laser displacement sensor, data acquisition card, and computer. The system first gathers the displacement information by laser displacement sensor, then performs coordinate transformation and three dimension reconstruction of the tubular member. The external diameter and the roundness error can also be measured. The experimental results show that the geometric dimensioning parameters measurement is effective and accurate using this method.
An Advanced Verification Environment Based on VMM
Authors: Wang Jing , Ji Xin Hua , Yang Ning Xin , Jia Chao
Published: March 2013

This paper presents an advanced verification environment based on VMM verification platform architecture which is constructed based on an object oriented language named System Verilog. The portable, reusable and extensible verification environment, which has a hierarchical structure，randomized excitation and self-check mechanism, efficiently improves the adequacy and reliability of verification and validation efficiency. The environment was used to verify an EEPROM controller which generated the reading and writing timing signals to operate EEPROM. The AHB bus function model-VIP, that used in the environment, reduced the development cycle efficiently. Additionally, the function coverage collected in the test platform gave an intuitive evidence of the verification adequacy and reliability.
Effect of Al2O3 Capping Layer in ZnO TFT Fabricated by Atomic Layer Deposition
Authors: Jeong Kwang Seok , Kim Yu Mi , Yun Ho Jin , Yang Seung Dong , Lee Sang Youl , Lee Hi Deok , Lee Ga Won
Published: March 2013

In this paper, the electrical and physical analysis is carried out to investigate the effect of Al2O3 capping layer on ZnO film using atomic layer deposition. ZnO TFTs shows the metallic conduction behavior as Al2O3 capping layer thickness increases. From SIMS analysis, it is found out that the diffusion of Al into ZnO film is enhanced according to Al2O3 capping layer thickness. Moreover, the defects related to oxygen such as oxygen vacancy increase from XPS analysis and ZnO films reveal less compressive stress by substitution of Zn with Al form XRD analysis. That is, the metallic conduction behavior of ZnO TFTs with Al2O3 capping layer can be explained due to increase in the carrier concentration in ZnO channel layer from oxygen vacancy and substitution of Zn with Al.
Residual Stress Profile of Ultra High Strength Low Alloy Steel Induced by High Speed Milling Process
Authors: Qiu Kun , Long Zhen Hai
Published: March 2013

In order to improve the surface quality of ultra high strength low alloy steel work-pieces produced by high-speed face milling process, 23-1 factorial design experiment was con-ducted and the residual stress profiles within the surface and subsurface layer of work-pieces were measured. Corresponding empirical models for the residual stress profile were presented and the effects of cutting parameters (cutting velocity, feed per tooth, depth of cut) on characteristics of the residual stress profile were studied. Results show that: with the range of cutting parameters tested, the compressive residual stress profile would be induced below the work-pieces’ surfaces machined by high speed face milling process. Feed per tooth has the critical influence on the characteristics of the compressive stress profile, and the mechanism of residual stress generation will be different when feed per tooth changes in high speed machining process. To obtain higher compressive stress and deeper compressive stress profile depth, larger feed rate and depth of cut are required.
A Study of the Effect of Mineral Particle Shapes on Breakage Rate in Ball Mill Using DEM
Authors: Li Hong Cheng , Dong Wei Min , Xie Xing Ping
Published: March 2013

In order to investigative the effect of mineral particle shapes to breakage rate of ore, basing on discrete element method, comparative grinding experiments were performed separately in a laboratory ball mill under the same conditions of mass and feed by using regular tetrahedron, parallelepiped and sphere as models of mineral particle. This study shows that ore grain shapes have a great influence on breakage rate due to different impact energies in ball mill.
In-Fiber Mach-Zehnder Interferometer Fabricated by Femtosecond Laser
Authors: Ou Zhi Long , Yu Yong Qin , Zheng Jia Rong , Wang Ji Shun , Chen Xue , Yan Pei Guang , Du Chen Lin
Published: March 2013

We have demonstrated several MZIs based on two spaced 3-dB LPFGs with different interference lengths in conventional SMFs fabricated in air by femtosecond laser pulses with the duration of 200 fs and the repetition rate of 250 kHz. Experimental results show that the average fringe spatial period increases with the resonance wavelength, while decreases with the interference length in approximately inverse proportion. The dominant cladding mode interfering with core mode has been calculated. The MZI sensitivity on temperature, refractive index and strain with a length of 16mm has also been investigated.
Effect of Polyaniline Doping on Structural and Vapor Sensing Properties of Tungsten Organometallic Thin Film
Authors: Zaine Intan Syaffinazzilla , Zabidi Z.M. , Alias A.N. , Jumali M.H.
Published: March 2013

Tungsten organometallic sol and tungsten organometallic-PANi sol were deposited onto SiO2 coated silicon substrates by a sol-gel spin coating technique. SEM studies on tungsten organometallic film show that it consists of many hollows compared to tungsten organometallic doped 1 wt.% PANi while SEM studies on tungsten organometallic doped 4 wt.% PANi show the sample became porous and agglomerated. Tungsten organometallic sensor was responsive towards isopropanol vapour at room remperature with sensitivity of 13.03%. Although the sensitivity of tungsten organometallic-PANi is lower than undoped PANi sensor, the hybrid sensor exhibited good reversibility meanwhile response of undoped PANi sensor decrease extremely with time. The small amount of PANi doping into tungsten organometallic sol improved the sensing properties of the sensor in terms of reversibility and recovery time.
The Anti-Inflammatory Effects of Tetrandrine-Loading Poly(L-Lactic Acid) Film In Vitro
Authors: Wang Qiang Song , Li Xiang , Cui Yuan Lu
Published: March 2013

In the present study, the anti-inflammatory effects of tetrandrine-loading poly (L-lactic acid) (PLLA) films were investigated in vitro. The surface characteristics of blank PLLA film and tetrandrine-loading PLLA films were examined by electron spectroscopy for chemical analysis (ESCA). The ESCA data suggested that the tetrandrine-loading PLLA films became enriched with nitrogen atoms. The MTT assay was applied to evaluate the cytotoxicity of PLLA films with RAW264.7 cells. Production of nitric oxide (NO) was measured by the Griess colorimetric method. The gene expression levels of inducible nitric oxide synthase (iNOS) and IL-6 were detected by quantitative real-time reverse-transcription polymerase chain reaction (real-time RT-PCR). These results suggested that the anti-inflammatory effects of tetrandrine-loading PLLA films might be the results from modulating the NO/iNOS pathway and inhibiting the mRNA expression of iNOS and IL-6 in activated macrophages.
Force Transfer Mechanism of the Hinge Joint of Multi-Adjacent Hollow Slab Precast Bridge
Authors: Wang Gang , Shen Yong Gang , Xie Xu
Published: March 2013

For the common diseases of the hinge joint, a new structure named thin-film layer is presented to simulate its function in finite element model. Through the field test of an on-built bridge, real measured results are used to determine the parameters of the layer in the model. The model result shows that the deformations of the hinge joint include vertical shear dislocation and transverse bending deformation, which may lead to different kinds of diseases of the structure. A certain amount of reinforcements with reasonable configuration focusing on intensifying the whole structure is preferred.
Heat Resistant Turbine Wheel Development of Automobile
Authors: Kang Dong Soo , Woo Kee Do , Kim Dong Gun , Kim Sang Mi , Kim Dae Young , Kang Whang Jin , Jo Eun Jeong
Published: March 2013

Turbochargers of automobilehave been widely used in commercial vehicles by diesel engine. Nowadays, turbochargeris being tried to use passenger car by gasoline engine such as deluxe and compact car. Therefore, fabrication method and conditions of turbine wheel which is core parts ofautomobile turbochargers,arereviewed by Lost wax method. To fabrication of turbine wheel using Inconel 713C alloy, vacuum induction melting (VIM) with alumina (Al2O3) crucible was used. Inas- cast Inconel 713C alloy, the strength at the elevated temperature is not satisfied to commercial standard. Therefore, heat treatment was introduced in Inconel 713C alloy to increase strength. The strength at the elevated temperature was increased by aging treatment.
Some Properties of the Pneumatic Artificial Muscle Expressed by the Nonlinear Differential Equation
Authors: Macurova Anna , Hrehova Stella
Published: March 2013

The paper presents the proposal for the expressed some properties of the pneumatic artificial muscle. The solution of the differential equation is expressed by the application of the polar coordinate. This equation is the model for the movement of the pneumatic artificial muscle.
Finite Element Analysis of Piston under Mechanical Load
Authors: Wen Li Zhi , Zheng Ming Feng , Wang Xin Jian
Published: March 2013

In this paper, the model of the piston is founded by use of UG, and then joined in the ANSYS, applied the Multiphysics module and static structuer analysis function, we can count the stress field of the piston and accomplish the evaluate of the mechanical load.