bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Calculation Method for the Reinforced Concrete Coupled Column in Certain Fuel Power Plant Main Building
Authors: Liu Wei Xing
Published: January 2015

In industrial buildings, reinforced concrete structure with low cost, superior corrosion resistance, fire resistance, while reducing regular, routine maintenance workload characteristics, widely used in thermal power plant room. But when the special process requirements and other conditions that restrict the construction site need to build span, height higher open plant, if the column structure is still using the traditional rectangular cross-section in the form of, in terms of force or from the economy are inappropriate. Double limb reinforced concrete columns flat belly bar, to solve this contradiction. This article will elaborate on the design and calculation methods flat belly bar double limb column.
The Experimental Study of Ultrasonic Testing Prestressed Bellows Pore Grouting Quality
Authors: Zhou Shao Lin , Zhang Feng , Cao Yuan
Published: January 2015

The ultrasonic method can be used for testing and analyzing the pore size of concrete. By studying the spectrum curves which is formed by ultrasonic transmitting at different thickness concrete panels can we get different time regular patterns of head waves formed by ultrasonic going through homogeneous concrete, compact grouting pore, grouting incompact pore, not grouting pore. All these provide a basis for predicting prestressed bellows pore grouting quality and judging whether there is interspace in pore. By artificially setting defects in bellows pore, for example, filling the pore to completely empty, 1/4 compact, 1/2 compact, 3/4 compact, fully compact and then embedding them in a concrete slab for ultrasonic testing. Test results show that the ultrasonic method can effectively evaluate the grouting quality of prestressed bellows pore.
Deterioration of FRP-Concrete Interface under the Environment of Dry-Wet Cycling at High Temperature Based on Reliability Theory
Authors: Yang Ting
Published: January 2015

Five conventional tests (Shapiro-Wilk test, Kolmogorov-Smirnov test, Cramer-von Mises test, Anderson-Darling test and Chi-Square test) were carried out in this paper to learn the probability distribution of fracture energy of FRP-concrete interface under the environment of dry-wet cycling at high temperature. The relationship between interfacial fracture energy and the number of cycles was established through nonlinear regression analysis. Then the reliability index and the probability of deterioration of FRP-concrete interface that uses experimental data as design values were analyzed according to the reliability theory. It is shown that the optimum distribution of interfacial fracture energy is lognormal distribution, and the relationship between logarithmic mean value of interfacial fracture energy and number of cycles is subject to the exponential function. As the cycle number increases, reliability index decreases rapidly while the probability of deterioration the other way around in the beginning, yet both are stabilized at a certain level eventually. The probability of deterioration has reached a high value in a few cycles in experiments.
Optimization of Stay Cables in the Double-Set Arch Pylon Cable-Stayed Bridge
Authors: Hu Shi Xiang , Ma Wen Gang , Luo Min
Published: January 2015

The determination of post-tensioning cable forces is one of the most important issues for the design of arch pylon cable stayed bridge. In this paper, the optimization module implemented in MATLB, together with the commercial finite element software MIDAS, were employed to evaluate the minimum bending strain energy of the bridge. After optimizing the cable forces, the bending moment of the pylons were bigger than the values of original design. The bending moment of the main arch pylon within 55m to 70m height increased by 7280 kN•m, and the bending moment of the auxiliary arch pylon within 30m to 60m height increased by 3926 kN•m .The stress of the pylons was still far below the allowance value when the obtained cable forces were applied. However, for the girder, the difference between the maximum positive and maximum negative bending moments due to dead load can be lessened greatly by the application of the obtained cable forces. The results obtained revealed that the method presented could make full use of cable forces and lead to optimal structural performance.
Analysis of Pile-Support Supporting Structure Internal Force in the Open Cut Section of Metro Tunnels
Authors: Kuang Yang , Yang Jun , Shan Ai Cheng
Published: January 2015

Based on the open excavation area from Yulu Station to Wulidian Station in Chongqing subway circle lines, the finite element software Ansys was used to establish three-dimensioned model to calculate and analyze the mechanical characteristic of the pile-support supporting. By simulating the construction process of subway tunnel, the characteristics of supporting structure were analyzed from the stress and displacement of pile and supporting. It can summarize that the internal force characteristics of pile-support supporting conform to the requirements of the construction safety.
A Research on a Medium-Speed Wire Cut Electrical Discharge Machining
Authors: Wu Chang Zhong , Lu Shuai Shuai
Published: January 2015

Based on the characteristics of the machine, wire walking agencies, table feed system and the circuit control section has been studied in combination with all kinds of WEDM. The machine use PLC to control the campaign of wire walking agencies, using the trip switch to control motor reversing, controlling the movement of the machine table through MCS-51 series single-chip and using high-frequency pulse-way power offers a range of different pulse width of the rectangle for WEDM .In this way ,it simplifies the overall structure of the machine and improves efficiency of the feed system and cutting performances.
Finite Element Analysis of Guyed Offshore Monotower Subjected to Extreme Environment in Malaysian Water
Authors: Jamaluddin Mohd Affiq , Liew Mohd Shahir , John Kurian V. , Eik Lee Hsiu
Published: January 2015

This paper presents the finite element structural sensitivity analysis of a cable guyed monotower known as the Tarpon Monopod when subjected to extreme environments in Malaysian waters. A hydrodynamic loading and static platform response analysis is performed in SACS v5.3 to gauge the structural robustness in extreme Malaysian metocean conditions. A Stokes Fifth Order Wave Theory was employed to obtain wave kinematics and dynamics for load computation. The Tarpon Monopod design is reviewed generically. An actual platform located in 60m water depth within Malaysian waters is modelled for analysis. Four different guying cable scenarios are considered which are the fully guyed condition (three guy cables pinned), two guy cables condition (one wire loss), one guy cable condition (two wire loss) and free standing condition (total loss of guy wires) are presented. The environmental load sets are simulated at different headings using 45 degree steps. The results suggest that the structural caisson contributes little to the lateral stiffness of the platform. The Tarpon Monopod has little structural redundancy and its integrity is highly dependent on guy wire condition and environmental load headings.
Researches on Friction Performance of Water-Lubricated Polymer Composite Journal Bearings Based on Experiments
Authors: Gao Geng Yuan , Yin Zhong Wei , Jiang Dan , Zhang Xiu Li
Published: January 2015

A composite which is PTFE as a matrix with PEEK and carbon fiber as fillers is developed to fabricate the bush of water-lubricated journal bearings. The bush is fabricated with a new structure that a relatively large straight groove is opened in its upper part. A water-lubricated journal bearing made up of the bush and a steel sleeve is studied using purposed-built test rig. It is shown that the test bearing operates under hydrodynamic lubrication for almost all of the given conditions. The composite developed in the work is a promising material for water-lubricated journal bearings, and the new structure can be well used in water-lubricated journal bearings.
The Adjacent Vehicle Coordination System on the Expressway
Authors: Zhang Fang Zhou , Jiang Hui , Lv Yang
Published: January 2015

The adjacent vehicle coordination monitoring system on the expressway is to calculate the relative position and display it. So the driver can observe the behavior of adjacent vehicles more easily and then to predict their next behavior. The technology of this system is based on the energy-efficient equipment-DSP which is used to control the peripheral devices. GPS is used to locate. ZigBee will send the latitude and longitude value to each vehicle in the queue. The system will use the latitude and longitude value to calculate the relative location between the vehicle and the vehicle, and display the value on the LCD screen. So the driver can observe each other and avoid these situations such as overspeed or emergency stop. After the test of each node's hardware and software design the main functions have been proved through the experiments.
Development of Sensor and Application of Biologic Sensor
Authors: Tang En Yang
Published: January 2015

With the development of mechanics and micro-electronic technology,sensor technology has a great improvement during the 50 years.At the same time,biologic technology is on the march.Biologist put forward more strict demand for biologic sensor,which in same degree boost progress of biologic sensor.This passage try to present basic theory of sensor and some advance biologic sensor.
Soil Moisture Inversion Based on AMSR-E and MODIS Data Fusion: A Case Study of Huaihe River Basin
Authors: Xu Jing Wen , Wang Yu Peng , Zhao Jun Fang , Pu Fei Yu , Wang Peng
Published: January 2015

In this paper, the correlation between fused data and original data, the measured soil and the precipitation data over Huaihe river basin by exploring the inversion of soil moisture from the time and space based on the method of multi-source remote sensing data fusion has been studied. In order to fuse the AMSR-E data which is all-day and all-weather and can penetrate the earth surface to some extent, with the MODIS data that can reflect the surface condition and temperature characteristics, the method of wavelet fusion was carried out in MATLAB. The conclusions of this study are listed as follows: (1) the inversion result of the fused data based on AMSE-E and MODIS is much better than a single remote sensing data inversion; (2) the fused data based on AMSE-E and MODIS is sensitive to soil moisture change trend when the seasons alternated every year, especially in the spring, summer and autumn.
Research on the Temperature and Humidity Environmental Testing & Analysis of Closed Breeding Plant System
Authors: Yang Wen Xiong , Hu Bin , Ma Cheng Wei
Published: January 2015

In order to make a more accurate control of temperature and humidity on the Closed Breeding Plant System (CBPS), air temperature and relative humidity changing with time and spatial distribution were monitored by temperature and humidity sensors in different space points (22) of CBPS for 6 consecutive days. The results showed that during the Bright Period , the average temperature of CBPS was 26.2 ± 0.5 °C, in the regulation of the target range and Relative humidity is 77 ± 2%, slightly higher than the control target. During Dark Period, the temperature falled from 26 °C to 19 °C and the average relative humidity reached 99%, significantly higher than control target. We could use the air switch to reduce relative humidity of CBPS.
Flight Tests Data Processing in Engineering for Light Aircrafts Take-Off Performance
Authors: Yu Xue Mei , Zhang Hua , Zhao Wen Jun
Published: January 2015

Method to deal flight test data on take-off performance for light aircrafts was provided in this paper. Firstly, the corresponding flight test requirements of regulation CCAR23 and impact factors were analyzed. Then, subsection coefficient method, which divides take-off phrase into three sections with different mathematical model, was adopted and relevant characteristic parameters were developed by simplified these math model. Finally, the parameters which were identified and proved valuable by analyzing their feasibility were used to calculate the aircraft take-off performance, and main factors influencing take-off performance were provided. The data processing method on flight test is also applicable to analyze landing performance by constructing proper theoretical model.
The Sensitivity Analysis of Power Loads and Meteorological Factors in Typhoon Weather
Authors: Hu Jian Chen , Fu Zi Xing , Jiang Shang , Zhang Yong Jun
Published: January 2015

Due to the lack of data about special windy or rainy day weather and the abnormal change characteristic of load, this paper proposes a new sensitivity analysis method between load and meteorological. Firstly, a method is put forward to select the factors affecting the load based on grey theory to calculate the correlation coefficient. Secondly, the multiple linear regression relationship between load and weather according to the meteorological conditions in different intervals is built to get more accurate sensitivity between load and meteorological factors. Finally, an example is used to reveal the law of load changing with weather in Haikou power grid. The result shows that the proposed method has a practical reference value for improving power grid load forecast accuracy and operation safety in the typhoon and other special weather conditions.
Acoustic Field Calculation of Ultrasonic Phased Array Concave Cylindrical Transducer
Authors: Wang Li Jiu , Li Shuang
Published: January 2015

The focus law and acoustic field computation method about circular arc linear phased array have been discussed in the paper. Acoustic field of transducers is given by the use of the coordinate transformation and an approximation with rectangle element instead of circular arc element, and was calculated using Rayleigh-Sommerfeld Integral.
Discussion on Active Television Interference Characteristic of UHV AC Transmission Line
Authors: Xie Hui Chun , Zhang Jian Gong , Zhou Zhuo Yi
Published: January 2015

High-voltage transmission line corona and sparking will bring television interference (TVI). Study has been seldom executed about active TVI from HV transmission line, and much less research on UHV AC lines. Based on present literatures, this paper brings forward test method of TVI from HV transmission line. Near straight span and tension tower of Chinese UHV AC Pilot Demonstration Project, several tests about TV picture, TVI field strength, the television signal field strength before and after lines energized, has been carried out in good weather. According to observation, interference characteristics to TV picture has been analyzed. Results indicate that, with increasing distance from the outer phase, UHV single circuit TVI field strength in fine weather attenuates negative exponentially. This paper illustrates it is questionable to use CISPR quasi-peak value for assessment of interference on TV picture caused by UHV transmission line corona and sparking noise.
Adaptation Evaluation Method of Distribution Network to Accept Distributed Generations
Authors: Hui Yu , Wang Xin , Zhao Dong Mei , Su Jian , Wang Peng , Liu Hai Tao
Published: January 2015

Adaptation evaluation index system is established according to the influences brought by the distributed generations (DGs) interconnected with the distribution network. Evaluation indicators are proposed to reflect the operating conditions of distribution lines, switches and other important devices of distribution network. Combine Analytic Hierarchy Process (AHP) and Principal Component Analysis (PCA) method is used to determine the weights of the evaluation indicators. Whereby obtain the comprehensive evaluation results of distribution equipment adaptation to DGs integration. A study of a practical grid is made in the cases of the DGs centralized integration, decentralized integration, and without DGs. The simulated result shows that a large number of DGs connected with the distribution network would deteriorate a majority of the equipment operating indicators, especially to the indexes related to switches and protection devices. Meanwhile, when a distribution network is connected into the same capacity of DGs, the distribution equipment would show a better adaptation to DGs' decentralized integration.
Influence of Inorganic Salts on the Refraction Index of Water
Authors: Zhao Xin Yi , Peng Yu Feng , Zhai Cong Cong , Han Xue Yun , Zhang Yi
Published: January 2015

The refractive index of double-distilled water and inorganic salt solutions of concentrations varying from 0.4 to 100 ppt (‰) have been measured at 20 Celsius degrees using Abbe refractometer, respectively. The inorganic salts such as NaCl, MgSO4, KCl and MgCl2,these forming the major constituents of seawater are used as solutes of the water solution. The effect of the concentration of these constituents on the refractive index of the solution is experimentally investigated. And meanwhile, the index of refraction studies are carried out for the laser wavelength of 405nm, 450nm, 532nm and 633nm under the case of varying concentration. The results show that the refractive index of the solution will be linearly increased with the increase of the concentration of these constituents. The index of refraction differs for the different solutes when their concentration is same at a certain wavelength.
Analysis on the Impacts of Different Distributed Generation Grid-Connected Modes on Power Quality
Authors: Wang Peng , Ren Zhi Yong , Zhao Dong Mei , Sheng Wan Xing , Yu Hui , Liu Hai Tao
Published: January 2015

This paper propose the power quality evaluation index used to evaluate the impacts of the different distributed generation grid-connected modes made on power quality in the distribution network. Simulation example is built on the basis of a real distribution network as prototype using DigSilent software. Then Comparative analysis of the impacts on voltage deviation, harmonic and short duration voltage fluctuations of decentralized integration mode and centralized integration mode are made. The simulation results show that the centralized mode has more influences on the distribution network power quality, especially when there is power generated by distributed generations flowing to the main grid.
A Research on Effective Communication Distance for Surface Wave Propagation
Authors: Li Jing Wei , Quan Hou De , Cui Pei Zhang
Published: January 2015

Near field communication of HF radio is in the form of surface wave propagation. The propagation loss increases with the increase distance, but there is a certain regular. In addition to this, the communication quality relates to the background noise. In order to find the relationship between them, we obtain the relationship between effective communication distance and background noise through theoretical derivation in the 2FSK system. Simulation results show that the effective communication distance is shorter with the increase of carrier frequency and the decline of the ground conductivity. And the simulation results can play a guiding role for the estimation of the HF radio’s effective communication distance.
Multi-Bit Flip-Flop Replacement Method Optimization and Synthesis Impact
Authors: Wang An Jing , Fu Yu Zhuo
Published: January 2015

Recently, Multi-bit flip-flop usage has shown its advantage in dynamic power saving in nowadays commercial electronic design. This paper present a more comprehensive comparison of chip-level synthesis result by using single-bit flip-flop and multi-bit flip-flop standard cell and except for analyzing the power and area benefit from replacement under the maximum speed, this paper give a compromise solution to solve that using multi-bit flip-flop cannot run as the fastest as single-bit with even large area. The trade-off between a multi-bit flip-flop cell driving strength and its area when designing multi-bit standard cell that will greatly influence synthesis result as speed arise are also mentioned. Finally, this research about MBFF further usage improvements may be helpful for designers to know how to take full advantage of multi-bit flip-flops to bring about the wanted benefit.
Research on Interference Model of Cooperative Cognitive Radio Networks over Rayleigh Fading Channel
Authors: Li Jian , Li Sheng Hong
Published: January 2015

Cooperative spectrum sensing technology has been identified as an effective approach to mitigate the interference generated by cognitive radio users on primary networks. In this paper, based on the rigorous mathematical derivation, we proposed an interference model of cooperative cognitive radio networks on the licensed user over Rayleigh fading wireless channel. In the case of the cognitive radio users independently and cooperatively sensing the existence of the licensed user, the proposed model analyzes the effect of some key parameters on the interference such as the missing detection probability of spectrum sensing scheme, spatial density of cognitive radio users etc. This model not only is a theoretical expression but also can be put into applications. The numerical results are given to verify the proposed model.
Mobile Communication Inter-Symbol Crosstalk Cancellation Based on Calman Digital Equalizer Filter
Authors: Sun Li Hua , Huang Cui Cui , Yu Liang Jun
Published: January 2015

In the digital mobile communication signal transmission system, the inter-symbol interference is one of the main factors affecting the performance. In order to make the error rate reducing to a minimum, this paper designs a new Calman digital equalization filter. It is based on Calman filter principle, and establishes the control mathematical model of observation equation and state equation, and uses MATLAB programming to realize the algorithm. In order to verify the effectiveness and reliability of this filter, this paper uses filter toolbox of MATAB to do numerical simulation on the filtering effect. Through comparing with normal digital equalization filter effect, after adding the Calman digital equalizer filter, the feedback signal is conformed to the reference signal. The duty ratio of SPWM follows the basic changing law, so as to maximize the elimination of crosstalk inter-symbol. It provides reference data for the research on mobile communication inter-symbol interference.
An Improved Adaptive Beamforming Method for Spatially Non-Collocated Vector Sensor Array
Authors: Dong Xiang Lei , Li Hui Yong , Wang Ling
Published: January 2015

To reduce the mutual coupling effects among the collocated electromagnetic vector sensor and enhance the performance of the joint space-polarization filtering, an improved adaptive beamforming method is proposed for non-collocated vector sensor array in this paper. First, the distributed array geometry composed of the crossed dipole pair and the signal model are introduced. Second, theoretical derivation of the improved method is discussed. By projecting the weight vector of the joint space-polarization minimum variance distortionless response (SPMVDR) onto a signal subspace, the optimal weight vector of the improved method is obtained. The projection operation generates a lower power of the output noise and improves the signal to interference plus noise power ratio (SINR) compared with the conventional SPMVDR. Computer simulation results indicate that the improved algorithm can achieve a good joint filtering performance and enhance the robustness to array pointing error.
Optimum Design Algorithms and Simulation Analysis of Power Transmission Network Based on EPOCHS
Authors: Hui Li
Published: January 2015

This paper studies a new type of power transmission network and power communication transmission technology. First, the working principle and network topology form of power optical transmission network have been presented in this paper, the power budget of the optical transmission model has been given through the loss of optical system and dispersion limit theory. Then the power transmission network and power communication transmission have been simulated through EPOCHS software simulation software, which based on the design aspects of CP transport port, transport protocol and transmission signal, the simulation parameters has been set according to the transmission mathematical model, and the security and efficiency of power transmission network has been proved through the fault signal diagnosis and signal characteristics of delay and jitter. The result of simulation shows that power transmission network power transmission have shorter delay and less jitter, which provides the reliable theory basis for the development of electric power communication network and complex network.
PWM Based DC-DC Converter Design with Feedforward Voltage for a Fuel Cell
Authors: Xiao Jun Ming , Zhang Wen Tai , Wen Sheng Jun , Wang Dong Yun
Published: January 2015

In this paper, a fuel cell power system is considered to supply DC power for a Peltier based cooling process. For the fuel cell, there exist slow dynamic response and soft characteristic due to long-running. Therefore, the fuel cell hybrid power system is designed, including fuel cell, battery, unidirectional DC-DC converter and bidirectional DC-DC converter. In order to reduce the slow dynamic response and soft characteristic, it is the most important that the bidirectional DC-DC converter is controlled for charging or discharging to the battery. A control scheme combined feedforward and feedback is proposed for the bidirectional DC-DC converter, where feedforward control is based on the output voltage of the fuel cell. Simulation results based on the designed circuit and proposed method are given to verify the performance of the converter.
Sensing System of Environmental Parameters Based on SMS Module
Authors: Yang Fan , Wang Qiu Jing , Gan Yi Fan
Published: January 2015

Environmental data transferring method based on cell network is featured with good signal coverage, reliability and without network development, therefore, this method has a large application value and prospect. In order to satisfy the demand of long distance, wirelessly environmental parameters sensing, an environmental parameters sensing system based on SMS (Short Message Service) module is developed. The system can measure environmental parameters, and send them by SMS. And also, this system can connect with PC (Personal Computer) as a remote environmental parameters acquiring terminal. Experiment results show that, the environmental parameters sensing system fulfill sensing environmental parameters and sending by SMS successfully.
Study of TD-LTE Coverage and Uplink/Downlink Power Budget in High-Speed Train
Authors: Hou Qun , Zhou Yi Fan , Peng Xin , Zhang Long
Published: January 2015

The signal coverage technology and the difficulties of TD-LTE coverage in High-speed Train are summarized. The method of the TD-LTE uplink/downlink power budget is mentioned and the path loss and power budget are calculated in ordinary scene and tunnel scene respectively. The results show that in the F working frequency band of the TD-LTE, the maximum path loss of the High-speed Train is allowable to reach 110~130 dB. In the ordinary scene, by using large power station and a high gain antenna, the outdoor coverage radius of TD-LTE is up to 600~1000m. In the tunnel scene, using the leaked cable, the coverage radius of the RRU is up to 500m.
Design and Realization of Smart Home System Based on Wireless Sensor Networks
Authors: Ruan Yan
Published: January 2015

The paper takes STM32 microcontroller as the core. The UIP protocol stack is transplanted to STM32 to construct embedded web server and wireless sensor networks is used to construct the internal network of smart home. In combination with GSM communication technology, a smart home control system with the advantages of reliability, simplicity and flexibility is designed. In addition, this article also introduced a low power wireless receiving and transmitting chip CC 1100 in detail, completed software and hardware design of wireless receiving and transmitting module. Aspect of hardware design, completed the peripheral circuit design of CC 1100 and design of interface circuit .Aspect of software design, completed setting of register, communication of SPI with single chip and receiving and transmitting of data, has given the flow chart and the procedure.
A Method Based on Hash Table to Implement the NAS Layer Decryption in LTE Big Data Platform
Authors: Zheng Ting , Zhang Zhi Zhong
Published: January 2015

Firstly, this paper introduces the overall framework and design ideas of LTE big data platform. Secondly, it describes the principles of decrypting encrypted data. In view of the distribution characters of keys required by NAS layer decryption, a decryption scheme for analysis and implementation based on the data structure of hash bucket is proposed. Finally, this scheme is validated and analyzed. Aiming to studying decryption scheme of NAS date, applying this scheme to analyze the LTE big data platform and implementing the function of encrypt the NAS PDU in LTE big data platform. The scheme has a good application value in the field of network testing and a great signification to the operation and maintenance of LTE big data platform.
The Modeling of Solar Cells
Authors: Li Chun , Zhou Shi Qiong
Published: January 2015

The world is increasingly experiencing a great need for additional power resources so as to reduce dependency on conventional sources, and solar energy could be an answer to that need. However, the performance of solar energy depends on solar radiation, ambient temperature, and load impedance. A practical engineering mathematic model of solar cell is developed and a general simulation model of PV cell is created based on Simulink system, which is convenient to be applied to the research and development of solar cell.
Design of Automatic Thermostat Control System for Substation Inspection Robot
Authors: Luan Yi Qing , Yang Wei , Xiao Peng , Ma Zhi Fang , Wang Hai Peng
Published: January 2015

When the inspection robot works outside the substation, the internal temperature of the robot will increase or reduce along with the ambient temperature and may become ill-suited for the instruments inside. According to this problem, we design an automatic thermostat based on Thermoelectric Cooler, and design the thermostatic control system. Experiments show that this system can keep the internal temperature in a proper range, and therefore improve the adaptability of the robot to the environment. Consequently, the reliability and stability of the inspection robot is greatly improved.
Study on the Pathogens Carrier Rate of “Red Globe” Table Grape at Different Temperatures
Authors: Zhang Lu , Gao Li , Li Xi Hong , Zhao Peng Yu , Li Feng , Shao Chong Xiao , Li Yao Yao , Ma Hong Yuan
Published: January 2015

“Red Globe” table grapes were packaged at four temperature conditions: -1C、-0.5C、0C and 4C. Pathogens carrier rate of grape flesh, grape pedicel, grape peduncle and disease incidence rate were measured at 0, 15, 30, 45, 60, 75 and 90 days. The result revealed that-0.5C was the best storage condition of “Red Globe” table grape, from perspective of pathogens carrier rate of grape flesh, grape pedicel, grape peduncle and disease incidence rate. There was a positive correlation between disease incidence rate and pathogens carrier rate of grape parts. This study is to provide a theoretical basis for reducing the loss red grapes.
Chaos Generation of Induction Motor Based on Time-Delayed State Variable Feedback
Authors: Wang Jun
Published: January 2015

In order to realize chaos generation in running process of three-phase AC induction motor, exact linearization via time-delayed state variable feedback is used in this paper. By discussing the condition of exact linearization of induction motor using differential geometry, the induction motor system realizes chaos generation. Running mode changes from steady state to periodic or even chaos motion. Designing the chaos generation controller; getting the chaos generation when induction motor running with this controller. The simulation results show that the time-delayed state variable feedback method which using differential geometry theory design chaos generation on induction motor model is feasible and the control result is satisfied.
The Effects of the Post-Annealing Atmosphere on the Ultraviolet Responsivity of n-ZnO/p-Silicon Nanowire Heterojunction
Authors: Zhou Hai , Zhu Yong Dan , Hu Cheng , Zuo An You
Published: January 2015

UV photoresponse of n-ZnO/p-Silicon nanowire (SiNW) photodiodes is investigated by varying post-treatment conditions. Based on spectral responsivity measurement, the responsivity of our photodiodes decreases with increasing the post-annealing temperature in vacuum atmosphere, and the biggest responsivity reaches to as high as ~42 A/W under a reverse bias of 2V near 390 nm when the post-annealing temperature is at 100 °C. And the responsivity is higher when our devices are annealed in vacuum atmosphere than in oxygen atmosphere. We think that the higher responsitivity may be due to the smaller grain size and more oxygen-vacancy-related defects in ZnO film deposited at lower temperature. These results may benefit potential applications of n-ZnO/p-SiNW photodetectors in ultraviolet region.
Modeling and Simulation for Anti-Lock Braking System (ABS) of Automobiles Based on Simulink
Authors: Gong Ting , Yan Hui , Liu Peng Fei
Published: January 2015

Anti-lock Braking System (ABS) is a critical active safety technology for automobiles. In this paper, continuous system and discrete system in ABS model are simulated, in which system simulation method based on finite-state machine is adopted, and Simulink is used for modeling. Result of simulation suggests that this simulation system can reflect the actual working process of ABSon automobiles, shorten braking distance obviously and improve safety.
Design of Control System for Automatic Welding Machine for Battery Packs of New Energy Automobile
Authors: Hu Hai Yan , Yang Jian Dong
Published: January 2015

According to the welding technology of the battery packs in new energy automobile, this paper adopts PC and motion control card as the hardware of the automatic welding machine control system and the software is designed based on the idea of both the hierarchical design and the modular design. The automatic operation of code G and code M of the numerical control system has been realized. Combining the coarse positioning with the fine positioning effectively solves the problems between efficiency and accuracy in position, which greatly promotes the stability of the system.It has excellent control functions and good performance.
Application of Man-Machine Isolation Automation Assembly for Industrial Electric Detonator
Authors: Li Hong Jun , Yan Jiu Jiang , Yan Long , Chen Wei
Published: January 2015

The article combines with existing industrial electric detonator production processes with in-depth analysis to the key issues of constrain ting the development of industrial electric detonator assembly automation. Then we put forward a new type of industrial electric detonator assembly production line based on man-machine isolation, comparing the new production mode with traditional mode of production and analyzing the advantages and feasibility, and then we carry on an experiment about a prototype produced according to the above processes so that we can verify the analytical results. The results show that this scheme can achieve human isolation and industrialization continuous operation requirements.
Parameters Tuning and Performance Analysis of PID Controller for Gas Tank Pressure
Authors: Zhang Jian , Zhang Song , Dan Zhi Hong
Published: January 2015

In this paper, we firstly analyze the performance of PID controller for pressure of gas tank. Based on the model with the variable of gas mass, we present quantitative relations between PID parameters and convergence rate, overshoot of pressure error. In the following, we further give the principles of parameter tuning for PID controller. Finally, an illustrative example is provided to demonstrate the effectiveness of proposed results.
Manufacturing Accuracy Control of Precision Machine Tool Based on Taguchi Method
Authors: Wang Chuan Lei , Sun Qing Chao , Mu Xiao Kai , Shi Bo Wen
Published: January 2015

In the manufacturing process of precision machine tool, the precision of the machine tool can not simply rely on parts design tolerance to achieve, and also need choose parts assemble for different tolerance values to ensure the accuracy of machine tools. Machine tool assembling deviation accumulation model is established by using the homogeneous coordinate transformation matrix, the quality loss function of taguchi methods apply to mechanical products matching activities. Considering the processing deviation of parts, the quality loss function of assembly cumulative deviation as an effective indicator for measure machine tool accuracy, the assembly precision of machine tools are ensured by optimize matching different geometric deviation parts. An example is given to testify the validity of this method.
Aviation Flight Attitude Control Technology
Authors: Hu Jun
Published: January 2015

This paper presents a range of two miniature spacecraft attitude Fuzzy Neural Network Sliding adaptive controller, using a weighting factor to combine indirect and direct fuzzy neural network controller fuzzy neural network controller. Interval two free parameters of fuzzy neural network adaptive sliding mode controller via output feedback control law and adaptive law be adjusted online. Simulation results show that after joining 10db Gaussian white noise, and in order to reduce the impact of external interference and noise training data, a controller with respect to the range of large amount of control type II generated by the controller. Overall adaptive scheme guarantees the global stability of the closed-loop system, all signals involved are bounded in some way, and also showed a high level of tracking performance.
The Combined Simulation of High-Speed Parallel Manipulator Based on MATLAB, SolidWorks and ADAMS
Authors: Zhen Zhuo , Liu Chao Ying , Zhang Ying Kun , Hao Cun Ming
Published: January 2015

This paper mainly focuses on the modeling and simulation of a three-DOF high-speed parallel robot which is widely used in the design of an enterprise vials testing equipment. For high-speed parallel manipulator rapid modeling and collaborative simulation, we study the two methods. One approach is to transfer the 3D SOLIDWORKS model into MATLAB/ SIMULINK model. Another method is to convert the three-dimensional model of SOLIDWORKS models into ADAMS. ADAMS and SIMULINK work together as a simulation platform. The results show that the two methods could provide the efficient and significant simulation platform to research the control strategy of High-speed parallel manipulator.
Pneumatic High-Pressure Mud Pump Based on PLC Control
Authors: Xu Yi Hong , Zhu Chang Sheng
Published: January 2015

This paper proposes a design of pneumatic high-pressure mud pump based on PLC control. According to this method, we design the three-cylinder reciprocating single acting pneumatic high-pressure mud pump, and give the details of PLC control system and high-pressure pump body, finally briefly describe the working principle and the experimental results.
Design of Multi-Intelligent Robot Wireless Communication System Based on ZigBee Automation Control
Authors: Chen Jie , Xiong Huo Gen
Published: January 2015

This paper designs a new ZigBee intelligent robot communication control system, which realizes one to many data transmission. Upper computer can send commands to control multiple mobile intelligent robots to do the action response through wireless module. Slave computer can also send data to host computer to achieve remote monitoring, and has high relay ability. In order to verify the effectiveness and reliability of the system, this paper tests the system and obtains 3D signal and robot node control distribution. Through the analysis of the system time delay and control signal features, we found that the system has good stability, which can satisfy the design need of multi-intelligent robot control. It provides the theoretical reference for the study of ZigBee automation control.
Optimization of Fractional Order Controller Parameters
Authors: Zhang Peng , Li Ping , Li Qing Rui
Published: January 2015

A new training method is proposed, which could solve the problem of that parameters of fractional order controller are not easy to be selected. This method which based on the principle of gravity optimizes parameters. Random initial parameter based on step was set as coordinate form which in the midpoint of the multidimensional space. The error between the actual output and the target output was set as radius. This method had advantages which could not need to calculate the gradient and could randomly select initial. Through the simulation experiment, this method is successfully applied in the fractional order PID controller, which obtains the optimal parameters.
The Analyse on Stiffness Model of 3-PPSR Flexible Parallel Robot
Authors: Luan Yu Liang , Rong Wei Bin , Sun Li Ning
Published: January 2015

In order to achieve greater workspace motion, it’s designed a high aspect ratio 3-PPSR flexible parallel robot, driven by a piezoelectric motor, connected by flexible hinges, which has the advantages of simple structure, non singular, seamless, high motion precision. Because of the stiffness of the system directly affecting the motion accuracy, load bearing performance, according to the characteristics of high aspect ratio flexible hinge, It’s established the mathematical model of flexible hinge through finite element method. Using method of integral stiffness, conbined coordination equation with force balance equation, the flexible stiffness model of system is obtained. Finally, through using Ansys, it’s confirmed the validity of the theoretical model by comparing of the theoretical stiffness model results with the finite element analysis of the model results, to provide a reliable guarantee for optimization and analysis of kinematics and dynamics of flexible parallel robot.
Control for Grid Connected Inverter under Unbalanced Grid Voltage Based on PI-QR Controller
Authors: Pan Jia Jin , Liu Yan Cheng , Wang Chuan , Zhang Qin Jin
Published: January 2015

Control strategy under unbalanced and distorted grid voltage is one of the most significant tasks for grid-connected inverter (GCI). In order to guarantee that the grid current meets the related IEEE Std.929-2000, a new control scheme was presented. Firstly, the typical model of GCI was presented. Secondly, the GCI control model based on PI-QR controller in synchronous reference frame (SRF) was built. Finally, the system’s simulation was conducted under distorted and unbalanced grid voltage. The results demonstrate the effectiveness of the presented control strategy.
Research on a Gantry Robot Based on PLC
Authors: Mahir A.I.I. , Deng San Peng
Published: January 2015

Picking and placing products manually on the production line has flaws of inefficient, it takes a long time, slow, unsafe, Non-flexible, high labor intensity. A gantry robot system is designed, which includes the gantry robot, conveyor belts and its control system base on PLC. The development of this system is to show the application through PLC, and then the efficiency of the system improved effectively. It provides an effective design for improving the system.
Computer Control Software Design Model Based on Improved PID Algorithm
Authors: Qian Xin Jie , Hu Gui Xiang , Fu Qiu Lin , Yang Bo
Published: January 2015

The optimal design for computer control software is studied. Since computer control software is susceptible to interference during the control process, a computer control software design model based on improved PID algorithm is proposed. The PID algorithm is combined with particle swarm algorithm to calculate PID control parameters, which is viewed as evolutionary particles of the particle population, and given a certain flight speed in the search space, the speed of the particles will be adjusted iteratively and dynamically in accordance with the experience of population’s evolution calculation, in order to achieve computer control software design. The simulation results show that the proposed algorithm applied for computer control software design, can improve the control precision and meet the actual needs of computer control.
Using Image Registration Method to Register UAV
Authors: Zhang Yan , Li Jian Zeng , Jiang Pan Pan , Du Yu Long , Gong Shi Feng
Published: January 2015

For the UAV’s characteristics that is the date of camera shooting and photographing and digital map contain information, a UAV target location method is presented based on image matching. Firstly, using the artificial reconnaissance registration method that has improved, the UAV aerial images that consider digital map coordinates as the target are registered to obtain registration information. Then, the UAV video frame resolution containing the target is improved by improving the method of super-resolution reconstruction. Finally, making use of the Gaussian pyramid matching algorithm based on optical flow, the video frames are registered with the aerial to complete the target. By MATLAB and C++ simulation, achieving the above algorithm. The results proved that this method achieve the target location without the UAV position and attitude information, while improving the precision and speed of target location, that is an effective method for target location in the battlefield.
Research on the Cooling System of High-Speed Motorized Spindle
Authors: Lei Chun Li , Rui Zhi Yuan , Li Te , Wu Qin
Published: January 2015

In order to control effectively the temperature of the motorized spindle, based on thermodynamics, heat transfer theory and fluid dynamics control theory, the model of motorized spindle with cooling system is established and simulated. Based on the idea of orthogonal experiment and simulation experiment, the comprehensive tests are built, and the optimum matching relation between the heat flux of motor and the flow velocity of cooling liquid is determined in this article. The results show that the flow velocity of coolant can be adjusted according to the heat flux of motor which can control the temperature in the steady range and improves the cooling effect.
Controlled Synthesis and Optical Properties of CuInS2 Nanocrystals
Authors: Guo Xiu Chun , Zhou Wen Hui
Published: January 2015

A facile method for the synthesis of size-and shape-controlled CuInS2 semiconductor nanocrystals was developed by thermolysis of a mixed solution of Cu (acac)2, In (acac)3 and dodecanethiol at 200 °C. By adjusting the reaction time, CuInS2 nanocrystals with size of ~2 to ~6 nm were obtained. The as-prepared nanocrystals were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis absorption and photoluminescence (PL) spectroscopy. The nanocrystals solutions exhibit tunable absorption and PL spectra with the absorption edge ranging from 450 to 750 nm while the PL emission peaks from 660 to 700, indicting a strong size-dependent quantum confinement effect. The proposed synthesis strategy developed in this work may be used as a general process for other metal chalcogenides nanocrystals and may have a bright application prospects in different areas, such photovoltaic application, in the future.
The QSPR Study for the Net Heat of Combustion of Esters Based on Ant Colony Optimization
Authors: Cao Hong Yin , Wang Rui
Published: January 2015

A quantitative structure–property relationship (QSPR) model for predicting the standard net heat of combustion () was developed based on the ant colony optimization (ACO) method coupled with the partial least square (PLS) for variable selection. Five molecular descriptors were screened out as the parameters of the model, which were finally constructed using multi-linear regression (MLR) method. A reliable model of five parameters for predicting the of esters was established, which can provide some help for engineering to predict the based on only their molecular structures.