bluuebunny/crossref_metadata_2025 huggingface dataset:
Facial Expression Recognition Based on Gabor Texture Features and Centre Binary Pattern
Authors: Li Li Sai , Ying Zi Lu , Huang Bin Bin
Published: March 2015

This paper was proposed a new algorithm for Facial Expression Recognition (FER) which was based on fusion of gabor texture features and Centre Binary Pattern (CBP). Firstly, gabor texture feature were extracted from every expression image. Five scales and eight orientations of gabor wavelet filters were used to extract gabor texture features. Then the CBP features were extracted from gabor feature images and adaboost algorithm was used to select final features from CBP feature images. Finally, we obtain expression recognition results on the final expression features by Sparse Representation-based Classification (SRC) method. The experiment results on Japanese Female Facial Expression (JAFFE) database demonstrated that the new algorithm had a much higher recognition rate than the traditional algorithms.
New Segmentation Scheme for Low Quality Fingerprint Images
Authors: Guo Bo , Han Bo , Niu Lei
Published: March 2015

Proposes a new scheme for low quality fingerprint images which is used point oriental image and based on gray distributing rule of the pixels after investigating existing approaches to fingerprint segmentation. Experiment results indicated that this scheme performs better than traditional fingerprint image segmentation alogrithms. And it has higher performance in terms of efficiency and robustness.
Research on Image Restoration Methods
Authors: Dong Yu Bing , Zhang Hua Xun , Sun Ying
Published: March 2015

In the paper, degradation and restoration model is introduced. Image restoration method using inverse filtering and using wiener filtering are studied and implemented. A new method of image restoration is proposed by combining histogram equalization and median filtering. Comparing three methods by MATLAB simulation, the results show that the new method can effectively restore degradation image with comparatively high restoration efficiency.
Monocular Structure from Motion Based on Angular BA
Authors: Li Xiu Zhi , Yang Ai Lin , Qiu Huan , Jia Song Min
Published: March 2015

This paper presents a technique for monocular Structure from Motion (SFM) that reconstructs 3D world shape. The technique proposed uses optical flow for 2D pixel pair matching and Angular Bundle Ajustment (ABA) for 3D structure refinement. The proposed strategy has two main advantages. Firstly, optical flow fields provide sufficient dense correspondence of image point pairs and secondly, ABA outperforms classic BA variants, especially for the points relatively far from camera. The reconstruction results obtained in realistic scenario demonstrate the effectiveness and accuracy of the proposed algorithm.
A Genenral Feistal Structure Based Color Image Encryption Algorithm
Authors: Lu Bin , Li Yu Chen , Liu Fen Lin
Published: March 2015

A General Feistal Structure based color image encryption and authentication algorithm is designed in this paper. The plain image is first permuted, then divided into groups of size pixels and encrypted by block encryption algorithm; finally the cipher image is obtained by performing inverse permutation on the image. In which, block encryption function is the kernel part of the encryption algorithm, and is designed with general feistel structure. To provide integrality authentication function, the last cipher block is the cipher of the sum of all plain blocks. It’s from experiments and analysis that the algorithm is secure and valid.
Data Mining Based Intelligent Retrieval Algorithm and its Application
Authors: Wang Chun Ping
Published: March 2015

Mathematical model of information retrieval algorithm retrieves digital libraries involved, it is very important to design an algorithm to make the best of the books, in order to extract the required information, including the association rules and classification method for from the database predicting the reader and potential use of fast and accurate information. In this paper, the intelligent data retrieval books mining algorithms to analyze, you can study the books of intelligent retrieval application, until the actual retrieval algorithm to solve the model first developed to meet the requirements, design a library of books intelligent information retrieval system .
Neural Network Expert System in the Application of the EMC Design
Authors: Tang Ji Ling , Li Nian Feng , Liu Hong Liang
Published: March 2015

According to the characteristics of the large equipment, electromagnetic interference, using neural network method is put forward a set of for large electronic equipment electromagnetic coupling and interference, the analysis of the expert system based on the large electronic equipment as analysis object, the common interference on the interference classification and coding, the BP neural network is constructed, using neural network, the inference mechanism of expert system for the optimization design, and test verification.
Exponential Stability for Stochastic Neural Networks with Time-Varying Delay and Leakage Delay
Authors: Li Ya Jun , Li Jing Zhao
Published: March 2015

This paper investigates the exponential stability problem for a class of stochastic neural networks with leakage delay. By employing a suitable Lyapunov functional and stochastic stability theory technic, the sufficient conditions which make the stochastic neural networks system exponential mean square stable are proposed and proved. All results are expressed in terms of linear matrix inequalities (LMIs). Example and simulation are presented to show the effectiveness of the proposed method.
Simulation of Traffic Flow in Hurricane Emergency Evacuation Use Dynamic Control Strategy
Authors: Mao Chao , Chen Shou , Yang Peng Fei
Published: March 2015

Based on the hurricane evacuation process, the dynamic characteristics of hurricane disaster risk were analyzed. The degree of harm and endanger regional are the two aspects of dynamic characteristics of hurricane disaster risk and by use the hurricane center and hurricane levels, the risk measurement method for a given point was proposed. The new emergency evacuation strategy was based on the largest decline of unit risk which was also the main idea of vehicle steering decision function. By the hurricane evacuation examples, the case that traffic net with traffic bottlenecks was studied by simulation. The results show that the proposed hurricane emergency evacuation strategy of this paper is feasible and have practical implications.
A Time Series Analysis and Neural Network Based Scheme for Fault Diagnosis of Transformers
Authors: Zhang Jian Jun , Song Ye Xin , Qu Yong
Published: March 2015

This research presents a time series analysis and artificial neural network (ANN)-based scheme for fault diagnosis of power transformers, which extracts the characteristic parameters of the faults of the transformer from the results of time series analysis and bases on this basis establishes the corresponding back propagation (BP) neural network to detect the transformer operating faults. The simulation experimental results show that as compared to the related works, the proposed approach effectively integrates the superiority of time series analysis and BP neural network and thus can greatly improve the diagnosis accuracy and reliability.
Solution for Radio Frequency Identification Conflict
Authors: Dai Yin Fei , Dai Yin Chun
Published: March 2015

The paper describes that when two or more tags in a wireless channel, and transmitting an identification signal to the reader, the signal will overlap, causing the reader can not normally be resolved.By comparing of the advantages and disadvantages of several anti-collision algorithm,clarify the need for anti-collision algorithm improvements.
A Method for Controlling the Permanent Magnet Linear Motor with the Counterweight by Pneumatic Cylinder
Authors: Chen Sheng , Zhao Dong Biao , Wang Yang Wei
Published: March 2015

In the control model of the permanent magnet linear motor (PMLM), if the pneumatic cylinder is used to balance the weight, the pressure dynamic variation of both suction chamber and discharge chamber can affect the load force of model. The dynamic model of pneumatic cylinder is analyzed, and the equation of impedimental force caused by the single acting pneumatic cylinder is given out. With the combination of PMLM model, the system’s kinetics equation is established. A modified 3-tier composite control structure based on nonlinear force observer is put forward. The nonlinear part of the system is compensated effectively. The the experiment results demonstrate the practical applicability and efficiency of the proposed method.
A Precision Compensation Method for Space Manipulator Trajectory Planning Based on Particle Filter
Authors: Wang Yi Fan , Sun Han Xu , Chen Gang , Jia Qing Xuan
Published: March 2015

A precision compensation method for space manipulator trajectory planning is presented for improving the accuracy during the execution of a task. First, the control process is described by using a state space equation. Second, process parameters are estimated in real-time using particle filter. Then, the system’s real time operational reliability is calculated based on the state space equation and process parameters. Finally, a control variable compensation strategy is given based on the theory of Statistical Process Control. Simulations show that this method effectively improves the accuracy and stability of space manipulator control system.
Study on Control System of SCM Palletizing Robot Arm
Authors: Diao Jin Xia , Hou Ru Ying , Hu Hai Dong
Published: March 2015

This paper studies the joint type palletizing robot arm, using MFC application platform designed a four-axis palletizing robot arm control software. Software in the paper we design has friendly interface, the operator through the input palletizing basic information, and then introduced with the steering gear control and DSP implementation of serial communication programming, and system hardware circuit was designed by palletizing robot arm control system simulation tests were conducted to verify system functions.
Water-Saving Monitoring System Design Based on LabView Simulation Platform
Authors: Shu Juan , Liao Huan He , Xu Yuan Fang
Published: March 2015

A water-saving irrigation monitoring system was designed based on ZigBee wireless sensor network and LabView simulation platform. This system can solve the problems of unnecessary waste caused by the traditional artificial irrigation water and wiring complex of water-saving control system. The information of each node and data acquisition can be detected by the ZigBee wireless network monitoring system. Upper machine was designed by LabView virtual design platform, and all aspects of organic characteristics of the crop water requirement rule were combined through the fuzzy control decision support system. The date of the irrigation water would be directed, and achieved a fine management of water and scientific irrigation.
Speed Sensorless Control System Based on MRAS
Authors: Jiao Zhi
Published: March 2015

In this paper, a strategy for estimating the induction motor’s rotor speed is proposed. The proposed rotor speed estimation strategy is based on model reference adaptive identification theory. By applying the proposed strategy, the induction motor control system can estimate the induction motor's rotor speed precisely. To improve the rotor speed estimation performance of the system, two methods have been adopt. The speed sensorless control system based on proposed strategy was built with Simulink blocks in Matlab platform. The corresponding simulation results demonstrate that the proposed method can operate stably in the whole range of speed with preferable estimation precision of stator resistance and rotor speed.
Obstacle Avoidance of Omnidirectional Intelligent Wheelchair Based on Multi-Sensors
Authors: Li Xiu Zhi , Liu Zhao , Jia Song Min
Published: March 2015

As the number of handicapped people increases worldwidely, the role of electric wheelchair becomes important to enhance their mobility. In the relevant community, attention is mainly directed to how to solve the problems in motion control for the wheelchair users, and scarce reports have appeared concerning obstacle avoidance of wheelchair. In this paper, we present a new method of obstacle avoidance for omnidirectional intelligent wheelchair bases on multi-sensors information fusion. Distance information acquired from ultrasonic sensors and visual information acquired from monocular camera are combined together, in which optical flow method is employed to distinguish obstacles. Extensive experiments have been conducted in the laboratory. As shown in experimental results that, the developed omnidirectional intelligent wheelchair works correctly and effectively in obstacle avoidance.
A Mitigation Method for Temperature Error Based on MEMS Gyroscopes Array
Authors: Li Song , He Xiao Feng , Wu Mei Ping , Hu Xiao Ping
Published: March 2015

In order to decrease the temperature error of MEMS gyroscopes, a mitigation method based on gyroscope array was proposed. Angular rate of MEMS gyroscope fluctuates dramatically with the change of gyro temperature when gyroscope starts up. The temperature characteristic error of MEMS gyroscope has become one of the major errors in the practical application. A mitigation method for temperature error was presented based on MEMS gyroscope array utilizing high correlation of temperature errors in the same batch of MEMS gyroscopes. This method was designed to improve environmental adaptability and shorten the startup time of MEMS based inertial measurement unit. Experimental results showed that the method was feasible and effective.
The Network Long-Distance Supervisory System Based on Web
Authors: Huo Da Yong , Wang Yi
Published: March 2015

From the perspective of system integration, this paper introduces how to apply the Web network technology to the long-distance supervisory system. It is discussed about the implementation plan and software design to form a web-based remote monitoring system. The software design of the entire supervisory system includes the local and the remote monitoring software design. The author analyzes the design purposes, the contents, the methods and the characteristics of these two kinds of softwares. This article studies the working process of web-based long-distance supervisory system. Related questions and the solution measures in the design of the system are also covered.
Measurement Uncertainty Sources Analysis and Verification of Time-Grating with Variable Coupling Coefficient
Authors: Yang Hong Tao , Fan Bin , Zhou Jiao , Fei Ye Tai , Peng Dong Lin
Published: March 2015

In order to improve the precision of Time-grating with Variable Coupling Coefficient, the electrical traveling wave equation was derived in detail base on the further study of working principle of Time-grating sensor. Combined with the processing and assembling methods of sensor, the uncertainty sources of sensor standing wave, synthesis traveling wave signal and the produce reasons of higher harmonic were analyzed by using uncertainty theory. The produce reasons of higher harmonic were verified with spectral analysis of the original sensor error data, and then the primary and secondary uncertainty sources affected the sensor measurement uncertainty sources were got, which were time and spatial orthogonal error, amplitude error of two roads signal and stator and rotor air gap uneven. The conclusion made in this paper can be used to conduct the structure optimal design, sensor error correction and uncertainty evaluation.
Quality Evaluation Apparatus and Method for Laser Shock Processing the Weld Used in FDSO
Authors: Wang Fei
Published: March 2015

A large number of the welding processes were used in the construction of the FDSO, and laser shock processing the critical weld can significantly improve the mechanical properties of the weld. For the current difficult to judge the impact of laser shock processing, quality evaluation apparatus and method for laser shock processing by light deflection were proposed for online quality assessment of laser shock processing the weld.
Design and Development of the Mass Image Storage Platform Based on Hadoop
Authors: Zhou Xiao Qing , Sun Jia Xiu , Luo Xing Xian
Published: March 2015

With fast development and deep appliance of the Internet, problem of mass image data storage stand out, so the problem of low management efficiency, low storage ability and high cost of traditional storage framework has appeared. The appearance of Hadoop provides a new thought. However, Hadoop itself is not suit for the handle of small files. This paper puts forward a storage framework of mass image files based on Hadoop, and solved the internal storage bottleneck of NameNode when small files are excessive through classification algorithm of preprocessing module and lead-in of high efficiency and first-level of index mechanism. The test manifests that the system is safe, easy to defend and has fine extension quality; as a result, it can reach to a fine effect.
A Novel Parameter Optimization Platform of Dynamic Reactive Power Compensator for Composite Power Load
Authors: Li Juan , Chen Jing , Yuan You Xin , Zhou Xue Song , Wang Yi Fei
Published: March 2015

Reactive power compensation is one of the effective means to improve the quality of voltage, reduce loss and save energy. How to make full use of the inductance converter and capacitance banks and to make them cooperative run, is the key of industrialization for the dynamic reactive power compensator for the composite power load. Therefore, a novel parameter optimization platform of the dynamic reactive power compensator for the composite power load is designed in this paper. The following works have been done in the study: reactive power variation characteristic of the composite power load and power factor requirements, capacity calculation and parameter adjusting method of the dynamic reactive power compensator, and a novel parameter optimization platform of the dynamic reactive power compensator for the composite power load. The research has laid a theoretical foundation for this dynamic reactive power compensator in industrial applications.
Study on the Measures to Prevent Hump Section Midway Switch
Authors: Wu Guang Rong
Published: March 2015

When hump field is in humping operation, for some reasons there will be an illusion that the section is switched ahead of time, which causes that the section gets the next order to switch on the way while the train is still in the section without clearing rail of the column, posing risks to the safe running of the humping hook vehicles. The above problems will be discussed and solutions for the switch due to the hump error will be raised.
The Design Optimization of Si-Based Isotope Microbattery
Authors: Cheng Zai Jun , Huang Chuan Wen , Zhou Peng
Published: March 2015

A theoretical model of Si-based P-N junction isotope microbattery’s electrical output was demonstrated. According to the model, electrical output performance of a 1*1 mm2Si-based isotope microbattery under the irradiation of a 1 mCi63Ni source was simulated. The optimal doping concentration was obtained when the microbattery had the maximum output power density of 0.95 nW/cm2.
The Research and Design of the Adaptive Automotive Headlamps Based LED System
Authors: Zhao Xu Sen , Bai Shuo
Published: March 2015

A new control scheme with self-adaption is put forward in this paper. The digital control and the analog circuit are combined. A light intensity sensor can be implemented with a photoelectric triode. This sensor makes the self-adaptation control of LED possible. As a result, the light of LED can be adjusted automatically with a PWM chopper according to the ambient brightness. The whole system’s power supply is from a Boost converter which has a high efficiency. In addition, This combination improves the hommization of the system and solves the problems existing incurrent headlamps, unsafe factors are also reduced. The validity of design is verified by experimental results.
The Dielectric Resonator Antenna with Good Electrical Properties and Special Shape for Camouflage
Authors: Zhou Chang , Yang Rong Hua , Xu Rong Yu , Liu Gang , Yan Yu Jie , Qu Dan , Fan You Wen
Published: March 2015

A dielectric resonator antenna with special shape for camouflage in the city is proposed in this paper. A series of antennas with different materials and shapes chosen from the normal building were made and analyzed. It was found that electrical properties of the antennas were extremely affected by shapes of the antenna and locations of the tap. Based on the results, a dielectric resonator antenna with return loss >-20dB, peak gain >6 dBi at 1.275 GHz was demonstrated. This technique will allow the design and installation of dielectric resonator antenna with good electrical properties for camouflage in the city .
Research on some Key Mechanical Properties of Silicon Nitride Thin Films Deposited by PECVD
Authors: Yang Qun Feng , Zheng Jian Yi , Wang Jun Qing , Lin Jun Hui , Zhao Xue Nan , Zheng Gao Feng
Published: March 2015

The purpose of this work is to study the mechanical characteristics of the silicon nitride(SiNx) thin films prepared by PECVD technique, some researches as follows were carried out. First, the SiNx thin films were deposited on the two different substrates. Then, the atomic force microscope (AFM) was adopted to test the surface quality of the SiNxfilms, and the scanning electron microscope (SEM) was used to test the section morphology of the SiNxthin films. Finally, the rotating beam structures was applied to measure the residual stress in the SiNx films. The SiNxthin films with low stress can be fabricated through PECVD, in which the surface roughness values(Ra) are 1.261 nm and 2.383nm, and the residual stress is 43.5 kPa. Therefore, the SiNxthin films deposited by PECVD are suitable for the preparation of device dielectric films in MEMS.
Measurement and Analysis of Concrete Curling Slab Using Imbedded Sensors
Authors: Qiang Wang
Published: March 2015

A series of accelerated full-scale tests on rigid pavement were conducted to evaluate the concrete slab curling effects on the pavement design. Data from deflection sensors and embedded strain gages were acquired and analyzed along with the observed performance data. The collected data can be used for identifying the slab corner cracking and potentially giving the slab curling amount.
Traffic tests were simulated using the finite element method in three dimensions and compared with sensor readings. A comparison of maximum tensile stresses between the curling slab and flat slab was performed. It was found that the critical stresses are located near the longitudinal joint in the curling model, the same as the distress observation of concrete slab.
Preparation and Crystallization of Modifed Talc/Poly(L-Lactic Acid) Composites
Authors: Wang Li Na , Deng Feng Jie
Published: March 2015

The slow crystallization speed of poly(Lactic acid)(PLA) has limited its application. In this work, the surface of Talc was grafted with oligo PLA, and then modifed Talc /PLA was prepared, and the results showed that the modified HA could greatly enhanced the crystallization of PLA.
Progress on Preparation and Application of Calcium Carbonate Whisker
Authors: Qiu Hui Hui , Luo Kang Bi , Li Hu Ping
Published: March 2015

Calcium carbonate whisker is a new kind of environmental-friendly inorganic material. Some advantages of calcium carbonate whisker such as low manufacture cost, simple preparation condition and excellent properties draw a lot of attention and make it higher potential competitive in the market. This review summarizes the research progress of calcium carbonate whiskers prepared with the different methods such as carbonation method, metathesis reaction method, sol-gel method, urea hydrolysis method and gravity crystallization method, and describes the research status in diverse applications of calcium carbonate whisker in enforcement of composite materials, being as filler of paper-making and additives in friction materials.
New Energy Development and Energy Chemical Engineering (Topic Field) Released of Alkali Species under High Pressure Gasification of Pakistani Coal
Authors: Jaffri Gul E Rana , Shah Jaffri Syed Ali Rehan
Published: March 2015

Inorganic species are released during pressurized gasification, can cause severe problem of hot corrosion. The direct utilization of coal is harmful for power plants. The aim of work to obtained comprehensive knowledge of release alkali species Na-,K-,Cl and S-species prior to carry out experiment. Therefore thermodynamic equilibrium calculations were performed by Fact Sage 5.2 and simulated the gasification environment at elevated pressure.Three soft Pakistani coal such as Lakhra (Vad < 41.44%), Thar (Vad < 42.02%) and Sor-range ((Vad < 21.11%) belong to Lignite and sub-bituminous coal were selected and releasing order was calculated by plotting mole fraction of each species Vs pressure (5 to 15bar ) at 1000°C.On the basis of predicted releasing order the H2S can be predicted most stable species under gasification at elevated pressure. The high released amount of SO2, H2S, NaCl, KCl and HCl was predicted for LKH and SRC at 5 and 15 bar pressure and 1000°C temperature. Comparing with high pressure the predicted released of H2S was found higher than SO2, NaCl, KCl and HCl at 15 bar pressure while the released of SO2was observed lower than H2S, NaCl, KCl and HCl at 5 bar pressure during gasification process. The above available predicted information is valuable for hot gas cleaning technology.
Synthesis, Structure and Electrical Properties of Pr-Doped Apatite-Type Lanthanum Silicates
Authors: Tian Li Peng , Ren Zhi Hua
Published: March 2015

Apatite-type lanthanum silicates doped with Pr3+ at the La site, La10-xPrxSi6O27 (x = 0, 1, 2, 3, 4, 4.5), were synthesized via sol-gel process. Thermal behavior of the dried gel of La10-xPrxSi6O27 sample was studied using TG/DTA. X-ray diffraction, SEM and complex impedance analysis were used to investigate the microstructure and electrical properties of La10-xPrxSi6O27 ceramics. The XRD results indicated the maximum doping quantity of Pr3+ is x = 4.5. Lanthanum silicates doped with Pr3+ cations have a higher total conductivity than that of undoped lanthanum silicates. The enhanced total conductivity depends on the improved density of La10-xPrxSi6O27 (x = 0, 1, 2, 3, 4, 4.5). At 973K, the highest total conductivity is 1.36×10-3S.cm-1 for La9PrSi6O27 ceramic.
Determination of the Interface Roughness between Ni-Coated Layer and Cu Substrate by Glow Discharge Optical Emission Spectroscopy Depth Profiling
Authors: Liu Yi , Lin Wei Xuan , Ye Wei Bing , Li Huan Sheng , Li Jiong , Yu Wei Hua , Wang Jiang Yong
Published: March 2015

The depth profiles of Ni-coated copper substrates polished by different mesh size sandpapers were measured by the glow discharge optical emission spectroscopy (GDOES) depth profiling technique. The measured depth profiles were well fitted by the MRI-CRAS model developed recently on the basis of the Mixing-Roughness-Information depth (MRI) model and the CRAter-Simulation (CRAS) model, taking into account the pronounced crater effect upon GDOES depth profiling. The crater effect upon depth profiling was characterized quantitatively and the interface roughness values between the coated Ni layer and the Cu substrates were determined and compared with the ones measured by AFM.
The Solar Cell Research of Particles Irradiation and Damage Effect
Authors: Peng Zhi Guo , Liu Hai Lang , Li Hang , Song Yi Mei , Cai Zhuo Kang
Published: March 2015

This paper discusses the particles irradiation effect of solar cells, particles irradiation damage mechanism of the solar cell are summarized. Through in-depth analysis and summary of predecessors' research results, proposed a variety of means such as electron irradiation, cobalt 60 irradiation and proton irradiation research the irradiation damage effect of polysilicon batteries. Through comparative analysis for rules, and for new materials research of the battery, improving preparation technology of the solar cell and monitoring the production process providing some reference of improving the radiation resistance and electrical performance of the battery.
Improving Safe Properties of Pp13TFSI Based Electrolyte for High-Voltage Graphite/Li[Li0.2Mn0.54Ni0.13Co0.13]O2 Battery
Authors: Li Hui Feng , Sun Gen Ban , Wang Qiang , Sun Lin Na , Jiang Fun Bin
Published: March 2015

Safety is the key-feature of high energy density lithium-ion batteries and thermal stability of the electrolytes is crucial. In this work, the thermal and flammability properties of mixed electrolytes based on the conventional ethylene carbonate (EC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC) (1:1:1 v/v/v), 1M LiPF6 and the hydrophobic ionic liquid (IL) N-methyl-N-propylpiperidinium bis (trifluoromethanesulfonyl) imide (Pp13TFSI) have been investigated. The mixed electrolyte is observed to be nonflammable at the Pp13TFSI contents of more than 40 vol.%. And physical and electrochemical characteristics of high energy density lithium ion batteries based on Li [Li0.2Mn0.54Ni0.13Co0.13]O2 as the cathode and artificial graphite as the anode with mixed electrolyte are also investigated. The cell of graphite/ Li [Li0.2Mn0.54Ni0.13Co0.13]O2 with 1 mol/L LiPF6/40%Pp13TFSI + 60% (EC+DMC+EMC) (1/1/1,v/v/v) electrolyte shows first charge capacity of 313.8 mAh g-1 and discharge capacity of 201.8 mAh g-1, respectively. Moreover, the nail penetration tests are carried out on the charged lithium-ion cells after formation, and the results show no explosion, ignition, or thermal runaway. These results suggest that the IL has potential to improve the safety of lithium ion batteries and can be used to fabricate the high energy density lithium ion batteries for electric vehicles and hybrid electric vehicles.
Optically-Enhanced Polymer Bulk Heterojunction Solar Cells by Addition of Gold Nanostructures
Authors: Zhang Li  Xin , Zhang Pan Pan , Ma Da , Dang Yang , Chen Xin , Zhang Chun  Xia , Kang Bo Nan
Published: March 2015

We investigate the effects of Au nanoparticles (Au NPs) on poly [N-9′′-hepta-decanyl-2,14-carbazole-alt-5,5-(4′,14′-di-2-thienyl-2′,1,3′-benzothiadiazole)]:ph-enyl-C61-butyric acid methyl ester (PCDTBT:PCBM) based organic photovoltaic (OPV) devices by thermal evaporating Au NPs onto polytetrafluoroethylene (PTFE) layer which is based on indium-tin-oxide (ITO) glass substrate.Significant improvement in terms of short-circuit current density (Jsc) by 33.6%, fill factor (FF) by 0.9%, and thereby commensurate power conversion efficiency (PCE) by 40.7% were achieved compared to devices without Au NPs. The OPVs performance enhancement is attributed to the formation of Au NPs-induced surface plasmons that increases the rate of exciton generation, and the probability of exciton dissociation.
Structures and Optical Properties of Sm-Doped CuInTe2 Semiconductor
Authors: Nie Xiao Meng , Guo Yong Quan
Published: March 2015

Since the rare earth based compounds have shown excellent properties such as luminescence and photo-electric transformation effect due to their 4f electronic structures. A novel Sm-doped CuIn1-xSmxTe2 semiconducting compounds have been designed and their crystal structures, microstructures and optical properties have been investigated using X-ray diffraction(XRD), scan electron microscopy (SEM), ultraviolet and visible spectrophotometer and Raman scattering. The results reveal that the doping of samarium into CuInTe2 (CIT) could stabilize the chalcopyrite structure, the lattice parameters shows fluctuation phenomenon with doping Sm in CIT. The SEM morphologies show that the grains tend to be agglomeration and form the column-like or the flake-like single crystals. The band gap Eg are corresponding to 1.25eV and 1.32eV before and after doping Sm with 0.1 mole into CuInTe2. Raman scattering analysis proves that Sm significantly adjusts the atomic vibrating models, and result in the losses of some vibrating peaks. It reveals that doping of Sm into CuInTe2 is helpful for the absorption of spectra with special frequencies.
Synthesis of Three Dimensional Graphene/Multiwalled Carbon Nanotubes Nanocomposites Hydrogel and Investigation of their Electrochemical Properties as Electrodes of Supercapacitors
Authors: Zhou Lei , He Da Wei , Wu Hong Lu , Qiu Zeng Hui
Published: March 2015

A facile synthesis method of three dimensional reduced graphene oxide (RGO)/multiwalled carbon nanotubes (MWCNTs) hydrogel was introduced. Hydrogel samples which were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM) and examined by X-ray diffraction (XRD) have been used as the electrode of supercapacitor. Cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) were used to investigate the Supercapacitors which we have fabricated. Because MWCNTs inserting into layers of RGO homogeneously prevent the layers of RGO from stacking and enlarge the specific surface area of graphene, the specific capacitance of RGO/MWCNTs material has been greatly improved. At the current density of 0.2A/g, the specific capacitance of RGO/MWCNTs electrode is about 176F/g, which means a 52% increasement compared to which of pure RGO material electrode. And the specific capacitance of RGO/MWCNTs also achieves a good rate property.
The Effect of N Doping Amount on Zn/N-Codoped Composite Films by Vacuum Deposition
Authors: Zhang Shu Juan , Li Ming Sheng , Duo Yi , Zeng Shu Qiang
Published: March 2015

The Zn/N co-doped composite thin films were deposited on medical glass slide by synthesis technique of arc ion plating and magnetron sputtering. The influence of N doping amount, annealing treatment on films properties were investigated. Film structure, surface morphologies and optical properties were measured with XRD, SEM and UV-VIS transmittance spectroscope. The results show that the absorption edges of the composite films increasing with the rising N doping amount. The greatest absorption edges of the composite films can reach 550nm, but the transmittance decreasing with the N doping amount increasing obviously. The absorption edge of the films decreased in different degree after annealing treatment. The annealing treatment reduces the absorption edge and decreases the N doping amount of Zn/N-codoped composite. The crystal structure changed obviously after annealing treatment, the crystal structure were most ZnTiO3 before annealing treatment, The ZnTiO3 diffraction peak decreases with increasing the N doping amount, the film surface grain changed significantly after annealing treatment, which is corresponding to the XRD result, the crystal particle got further crystallization.
Experimental Study on Seismic Performance of Circular Steel Self-Compacting Concrete Elements
Authors: Zhang Ming Tang , Zhao Wei Juan , Zhang Zhi Run , Wang Qing Li
Published: March 2015

In this article, through changing the parameters of the slenderness ratio lambda and axial compression ratio of n, the eight experimental study of steel tube concrete bending members with circular cross section. To explore different slenderness ratio of lambda concrete-filled steel tube under low cycle loading, the damage form of artifacts, deflection change, the relationship between the load and strain, load (P) and displacement (Δ) curve, the axial deformation and stiffness degradation curve, displacement ductility coefficient and the change of parameters such as energy consumption, thus further elastic-plastic seismic response analysis of concrete filled steel tubular structures. Got by test data of load P - displacement Δ relation curve and stiffness degradation curve, the displacement ductility coefficient, the total energy consumption. To get round steel tube reinforced concrete member seismic performance is good, the ductility damage.
Moisture Damage Range in Gradation of Asphalt Mixture ATB-25
Authors: Tian Peng , Zhan Gao Feng , Nai Lei
Published: March 2015

The first aim of asphalt mixture gradation design is moisture resistance and uniformity. In such a case, the high temperature stability and durability is to be improved. In order to improve the moisture resistance level of asphalt mixture ATB-25, and reduce the possibility of moisture damage, the experiment will use the orthogonal method. On this condition, chose 9 group of mixture gradation with two factors and three levels. With marshall experiment and the results analysis we find the relationship in VV, asphalt content and gradation. The maximal and minimum value of VV will be found. The range of moisture damage will be obtained. This research will provide a meaningful reference for ATB-25 gradation design.
Sodium Sulfate Corrosion of Polypropylene Concrete Strength Curve of Impact Study
Authors: Sun Chang Zheng , Zhu Fan Fan , Lin Ying Dong
Published: March 2015

Using ultrasonic method for various corrosion instars of clear water, sodium sulfate solution corrosion respectively after block of NDT, polypropylene mortar test results calculated according to the theory of strength. Through the press again the compressive strength test, it is concluded that polypropylene mortar test block intensity of real value[4]. Through the press again the compressive strength test, it is concluded that polypropylene mortar test block intensity of real value.
Influence of Modified Organosilicon Waterproofing Agent on Durability of Concrete
Authors: Hu Yan Yan , He Ting Shu , Song Xue Feng
Published: March 2015

Modified organosilicon waterproofing agent was synthetized. It was painted on concrete surface and then the influence of durability on concrete was studied. Results indicate if it is painted on the surface of concrete, it has excellent hydrophobicity and can greatly improve the concrete quality. It can reduce the penetrability coefficient of chloride 6~10 times lower than the one without coating .The agent can prolong reinforced concrete’s life and reduce the carbonization depth of concrete.
The Effect of Milling Parameters and Nickel Content on Ni-Al-TiO2-B2O3  System during Mechanical Alloying
Authors: Liu Qi , Dong Shi Jie , Guang Xu , Sun Shi Xuan , Luo Ping
Published: March 2015

The effect of nickel contents and milling parameters on the preparation procession of TiB2-Al2O3 composite powders during the mechanical alloying (MA) was studied in this paper. Milling parameters have certain influence on the phase transformation of Ni-Al-TiO2-B2O3 system during mechanical processing. With the same milling parameters, the proper content of Ni can promote the reaction route and influence the microtopography of the products.
Effect of Yttrium Addition on Cyclic Oxidation Behavior of Co-10Cr-10Al Alloys at 1073K
Authors: Wang Jun , Xu Xian Chao , Wang Yang , Wang Chu , Xie Fei , Li Yu Qin , Luo Chun Li , Xiang Jun Huai , Zhang Hong Hua
Published: March 2015

The effect of rare earth element yttrium on cyclic oxidation behavior of Co-10Cr-10Al alloys in ambient atmosphere of 1 atm at 1073K was investigated. The results indicated that the addition of 0.05 at.% Y in the alloy enhanced the formation of protective oxide scales with compact smooth surface, and improved cyclic oxidation resistance of the alloy. On the contrary, the addition of 0.1-0.3 at.%Y greatly increased the oxidation rate of the alloy, with formation of a rapidly growing Co oxides layer with the porous and rough surface appearance.
Microstructural Evolution of Cr-Ta Powder in the Process of Mechanical Alloying
Authors: Yao Jing , Lu Shi Qiang , Xiao Xuan
Published: March 2015

High energy ball mill tests under the condition of the ball material mass ratio 13:1 and the rotate speed 400 r/min have been employed to investigate the process of mechanical alloying (MA) of Ta and Cr powder mixed in the mole ratio of 1:2.The microstructure evolution process and phase composition were explained useing scanning electron microscope (SEM) and X-ray diffraction (XRD). The results show that, the milled 20h powder existed in Ta (Cr) supersaturated solid solution and amorphous after 40h. Although the hours were spent on ball milling reached to 50h, Laves phase TaCr2had not been made during the process.
Effect of V, Ti, and Ce on Structure and Performance of NM400
Authors: Peng Jun , Niu Liang , Guo Yong , Liu Li Xia , An Sheng Li
Published: March 2015

To improve the performance of NM400, V, Ti and Ce were added in NM400. The effect of alloy on grain size, precipitation, hardness and toughness was studied. The result shows that V and Ti can improve the performance by grain refiner and dispersion-strengthening. By further adding Ce, the size of grain and precipitations of V and Ti is significantly reduced, the solid solution quantity of V and Ti and the amount of precipitation are increased, and the precipitation shape transforms from cube to sphere. Therefore the hardness and toughness of steel are greatly improved. In this study, 0.2% V and 0.2% Ti were added into NM400. As a result, the precipitation of V and Ti, in form of carbide and nitride, was the smallest and dispersed, and the grain size was the smallest, which leaded to the best performance. The conclusion is that, to ameliorate the performance of NM400, the optimal additive amount of V and Ti is 0.2% no matter whether adding Ce or not.
Effect of Al2O3 and CaF2 on Melting Temperature of High Calcium Ladle Desulfurization Slag
Authors: Fan Wei , Zhang Jin Zhu , Ao Wan Zhong , Huang Jun
Published: March 2015

The external desulphurization of molten iron has become an important step in the production of steel and iron. The melting temperatures of high calcium desulfurization slag, which were taken from Shougang Shuicheng Iron and Steel (Group) Co. Limited, were investigated on basis of the method of hemisphaerium temperature. The contents of CaO, Al2O3 and CaF2 in the slag were adjusted in 47%-53%, 14%-20% and 2%-10% respectively by adding analytical reagent Ca (OH)2, Al2O3 and CaF2 using orthogonal design. The results show that the melting temperature of desulfurization slag decreases obviously with the increase of the content of Al2O3 between 14% and 20%, and decreased markedly with the increase of the content of CaF2 lower than 8%. The impact to the melting temperature of the high calcium slag is as follows: Al2O3 > CaF2 > CaO.
The Present Situation and Developing Trends of Hot Closed-Die Forging
Authors: Liu Qi , Guang Xu , Sun Shi Xuan
Published: March 2015

Due to its advantages including high quality of the forging parts and low production costs,hot closed-die forging (HCDF) play an essential role in the machine building industry. However, in recent decades, the pace of its development is gradually slowing down. In the hope of drawing up some new ideas about future development of the HCDF, this paper presents a brief overview of it. This study roughly prospects several potential research issues of the HCDF. Some new research fields such as precision forging, combined forging and numerical simulation have been shown. Challenges and possible response to them have been discussed.
Experimental Study of a Lead-Zinc Sulfide Comprehensive Recovery
Authors: Li Ji Yong , Tong Xiong , Xie Xian
Published: March 2015

A refractory lead-zinc sulfide was studied in this experiment, at which the effect of use of new zinc activator L-23 and a traditional zinc activator copper sulfate are compared. It’s drawn from the results, with use of a new activator L-23, the grade and recovery of zinc concentrate have a significantly increase, and attained a good indicator that the zinc concentrate grade is 43.77%, recovery is 79.62%.
Research Progress of Adsorption Capacity-Enhancing Modified Natural Manganese Mineral
Authors: Yu Hua Jiang
Published: March 2015

The progress of adsorption capacity-enhancing modified manganese mineral, as well as the optimal conditions on which the adsorption of modified natural manganese mineral is conducted, are discussed and summarized in this paper. Moreover, the optimal parameters of the adsorption of Cu2+, Ni2+, and As (V) by using natural manganese mineral are respectively presented and the adsorption capacity is compared.
Study on the Pretreatment Leaching of a Micro-Disseminated Gold Ore Deposited in Yunnan
Authors: Wang Fei Wang , Cui Yi Qi , Tong Xiong , Xie Dan Dan
Published: March 2015

In this research, a fine disseminated gold ore in Yunnan, After four ore exploration tests of chemical pretreatment, get a reasonable oxidation-leaching process that: W-1 (60 kg/t) and M-3 (45 kg/t) used in conjunction with inflated amount of 0.5 m3/h, under the condition of 75°C, stirring pretreated for 24 h, the ore sample after pretreatment was filtered to take a certain amount ,at the condition of normal temperature and pressure, NH4SCN 0.6 mol/L, KMnO4 10 g/L, slurry solid ratio of pulp is 4:1, stirring time is 5 h, pH value is 3. Under these conditions, the gold leaching rate up to 82.26%.
The Application of BOP During Oil Well Drilling
Authors: Han Guo You , Zhang Xi Sheng , Du Xiu Hua
Published: March 2015

This is an introduction to brief application of blowout preventers and accessory equipment. Fluid (either liquid or gas) erupts from the well, usually with great force, and often ignites into a roaring inferno, especially if the fluid is gas. The trouble arises when the pressure in the formation is higher than that in the well. The pressure in the well is maintained by the type and amount of drilling fluid being circulated through it. Blowout preventers(BOPs), in conjunction with other equipment and techniques, are used to close the well in and allow the crew to control a kick before it becomes a blowout.
The Research of Geochemical Characteristics and Indicative Significance for the Source Springs - A Case of Huanglong Valley in Sichuan Province
Authors: Zhang Kai Guang , Wang Hai Jing , Ba Ming Ting
Published: March 2015

This paper used the methods of hydrochemical data logging, in-situ titrating , collecting the Source spring samples and the atmospheric samples in the water, by analysis their geochemical characteristics, to distinguish the source of sediment at Huanglong valley in Sichuan. The research shows the gas in the Haunglong Spring water is mainly from deep earth, which contains the inner earth information, instead of atmospheric or biogenic origin. Meanwhile, the research also shows the travertine deposited samples in the deep groove of earth contain a lot of information about the tectonic movements such as earthquakes , volcano activities and so on.
The Technology Limits for Stratified Injection of Polymer Flooding
Authors: Sun Qi , Yang Jing , Sun Li Yan , Dong Xiu Long
Published: March 2015

At present the development of Daqing Oilfield has entered the water pick-up period, and the polymer separate injection technology for the injection well is urgent needed. However, the difficulty of selecting well and lever for the separate injection of the injection well is relatively large due to the complexity of the Class II reservoir of geological conditions. So for The limits of technology of the geological features, the limits of technology injection of stratified polymer injection for the Class II reservoir provides a scientific basis for the development of oil fields.In this paper, taking Daqing Oilfield Sabei Development Zone as example, establish the mathematical model of polymer flooding. Determine the well and layer selection principles of layered polymer injection wells in the ClassIIreservoir timing. According to the current development situation, give the decrease in water content and the improvement value in recovery under a given measure.Through this paper, we have got production effect of layered polymer injection in the Class II reservoir of Sabei area and given quantified layered polymer injection technology limits.