bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Relationship between Projection Number and Image Noise Level in FBP Reconstruction
Authors: Fang Zheng , Gu Xin , Zhang Xing Liang , Zhang Jing Rui , Chen Si Yuan
Published: July 2013

The number of projection affects the reconstruction quality in computed tomography system. Larger projection number will lead to better reconstruction quality. On the other hand, less projection number can reduce the radiation dose, save time and keep the patients comfortable. The optimal number of projection compromises both the mathematical accuracy and practical requirement. The purpose of this paper is to find the relationship between the projection number and the noise properties of reconstructed cross-section. It can provide references for researchers on CT application. A micro-CT system is utilized to validate the relationship between projection number and reconstruction quality in fan beam geometry. Full-scan and short-scan method are applied to reconstruct the specimen. Compared with full-scan method, short-scan can reduce radiation dose with the same step angle, and it can achieve better results with the same projection number when the sample data is sufficient.
Experimental Study of End Milling Force on Manganese Steel
Authors: Abebe Girma Seife , Liu Ping
Published: July 2013

Cutting force is a key factor influencing the machining deformation of weak rigidity work pieces. In order to reduce the machining deformation and improve the process precision and the surface quality, it is necessary to study the factors influencing the cutting force and build the regression model of cutting forces. This paper discusses the development of the first and second order models for predicting the cutting force produced in end-milling operation of modified manganese steel. The first and second order cutting force equations are developed using the response surface methodology (RSM) to study the effect of four input cutting parameters (cutting speed, feed rate, radial depth and axial depth of cut) on cutting force. The separate effect of individual input factors and the interaction between these factors are also investigated in this study. The received second order equation shows, based on the variance analysis, that the most influential input parameter was the feed rate followed by axial depth, and radial depth of cut. It was found that the interaction of feed with axial depth was extremely strong. In addition, the interactions of feed with radial depth; and feed rate with radial depth of cut were observed to be quite significant. The predictive models in this study are believed to produce values of the longitudinal component of the cutting force close to those readings recorded experimentally with a 95% confident interval.
The Design of Smart Search Support System in Data Information
Authors: Chen Yu Ke , Ma Yu Long , Bai Yang
Published: July 2013

This paper has discussed the design of the data information smart search support system according to certain data base, building phrase dictionary, and adopting the first code input of phrase spelling and Chin-English translation. It has achieved the functions such as the fast editing input and check of search code, and the dictionary maintain. Therefore, it has supported the person who searches information and the person who edits code fast with the data base.
The Behavior Strategy in Energy Saving and Emission Reduction of Transportation
Authors: Zhang Li , Zhang Yi , He Yu Hong , You Xin Ren
Published: July 2013

Reducing transport energy consumption and pollution emissions play an important role in the national energy security and protection of the ecological environment. Based on the status quo and main constraints of Chinese transport energy conservation and emission reduction, this paper discusses the recent behavior strategies to achieve the goal, from the five perspectives of technology, structure, management, institution and travel mode.
Preparation of Chitosan/TPP Nanoparticles Used as Carrier in Enzyme Immobilization
Authors: Sha Bi Ying , Liu Qing Shan , You Jing Jing , Ren Xiao Dan , Feng Hui , Yin Xiao Ying
Published: July 2013

This work investigated the preparation of chitosan nanoparticles used as carriers for immobilized enzyme. Methods The nanoparticles were prepared by ionotropic gelation method. Response surface methodology was used in the preparation of nanoparticles. The morphologic characterization of chitosan nanoparticles was evaluated by scanning electron microscope and atomic force microscope. Results Using an appropriate experimental design, we have studied the significant influence factors (pH of the solution, concentrations of the chitosan , ratios of components) in the preparation of chitosan/triphosphate (TPP) nanoparticles.
Comparative Evaluation of Volatile Constituents of the Ligarine Extracts from Different Parts of Ficus altissima
Authors: Wang Xin Guang , Luo Xian Qun , Mei Yi Ming , Lin Qiang , Xu Jing
Published: July 2013

This study was designed to comparative evaluate the volatile constituents of bark, fruit, leaf, aerial root, and root parts ofFicus altissima(Moraceace). Gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS) revealed the presence of 5, 14, 8, 10 and 2 compounds in the extracts obtained by ligarine extraction from different parts, respectively. The total yield of the volatile fractions was subsequently 0.93%, 0.50%, 4.24%, 3.41% and 0.72%. Higher amounts of esters, aliphatic acids and aliphatic hydrocarbons were found to compose major chemotypes in diverse parts of the plant attaining to 51.32%, 51.53% and 85.38% maximum, individually, with the exception of the extract from root, which consisted mainly of heterocyclic pyrrolidinone (75.93%). Dibutyl phthalate was the main and common component of all the volatile extracts totally attaining in average 49.20%, 22.83%, 4.09%, 11.45% and 24.07%, independently. The antioxidant activity by DPPH test was investigated for all the extracts. In addition, some pharmaceutical components such as elaidic acid, linoleic acid, squalene and vitamin E were discovered. The study offers theoretic basis for utilization of the traditional folk herbF. altissima.
Study on LOD of Chinese Honey Adulterated with HFCS by HPAEC-PAD
Authors: He Jin Zhe , Lei Ming , Sun Pei Long
Published: July 2013

In consideration of the adulterated situation and characteristics of Chinese honey market, high performance anion exchange chromatography-pulsed amperometric detection (HPAEC-PAD) used for detection of high fructose corn syrup (HFCS) in adulterated honey were further studied in this paper, Isocratic elution with optimize chromatographic conditions, the limit of detection (LOD) of HFCS in adulterated acacia honey, linden honey, date honey and citrus honey can reached 1% respectively, while performed good reproducibility and high stability. This method was simple, effective, high sensitivity, and can be widely applied to the detection of honey with HFCS.
The Calorific Value and Water Content of Three Kinds of Fish around Zhoushan Archipelago
Authors: Song Ke , Zhao Sheng , Lin Chao
Published: July 2013

Calorific value is the energy scale, reflects the change of various physiological activity in organizations and the effects of various environmental factors on animal and plant growth. It can be used as an effective index of animal and plant growth status. The three kinds economic fish: Japanese croaker (Argyrosomus japonicus), Large yellow croaker (Larimichthys crocea) and Japanese seabass (Lateolabrax japonicus) living around Zhoushan Archipelago, are studied in the experiment. Calorific value is measured by HWR-15E. The results show that: the muscle tissue water content ratio of each kind of fish is higher than the intact. The calorific value of the intact fish is higher than the muscular part. In addition, the closer the phylogenetic relationship between studied fish, the more significant calorific value difference.
Research and Application of EPWS (Equitable Payment for Watershed Service) by Measuring Sediments Based on GIS Technology
Authors: Huang Bo , Luo Hong Bing , Tang Jia Fa , Liu Xiao Ling , Deng Wei Jie , Xu Qiang , Zhang Ke
Published: July 2013

The first successful EPWS(Equitable Payment for Watershed Service) case is in Peru where there had finished whole three phases with excellent operation under the internal motive force between upstream community and downstream water supply company from 2009 to date. In China, the first EPWS programme in 2011 had followed the successful EPWS cases to find the adaptability of EPWS development in other watershed in Chian. Rapid hydrology appraisal for EPWS is most basis technology need. In this study, the sedimentation has been assessed and forecasted by GIS technology by using the measured sediment data. The average contribution of SS loads from Yuping Village and Ganzikou Village were about 67 % of EPWS area. This rapid hydrology appraisal had paid a key role to cause the signature of MOU on June 1th 2012 between upstream communities and downstream hydropower station. The next phase of EPWS will be carried out the planned livelihood strategies within water and soil erosion protection by upstream communities, then produced watershed service (reduced sediments) will be monitored and assessed by downstream hydropower station or other organizations.
A Magnetic-Controlled Detection System for Radar Absorbing Coatings
Authors: Zhou Jian Hua , Huo Li Xia , Li Wei Wen , You Bai Qiang , Li Yan Long , Li Hai Xiong
Published: July 2013

A magnetic-controlled detection system, with a rectangular solenoid coil in a waveguide test fixture, is proposed for radar absorbing coatings. By applying Ku-band rectangular waveguide, the field patterns at different positions, the reflection coefficientS11and its variation of several coating samples are simulated and measured under current loaded from 0 to 1.0 A. The results show that this detection system is repeatable and stable, and also reliable with the error of less than 10%.
Fault Diagnosis of Wind Turbines Based on Noise Detection
Authors: Cheng Jing , Wang Wei Qing , He Shan
Published: July 2013

Aiming at backward current situation of testing technology and fault diagnosis technology of wind power generation in China, a fault diagnosis method based on based on noise detection is put forward. Studied IEC 61400-11 noise measurement technology standard, this paper elaborates the noise detecting method, analyzes the feasibility and diagnostic steps of fault diagnosis, proposes fault signal extracting method based on wavelet analysis. According to analysis and simulation, it is shown that noise measurement is earlier than vibration detection, and the fault signal can be extracted effectively, so it has important value for engineering application.
Hub Eccentricity Measurement Based on Machine Vision
Authors: Han Rui , Zhang Feng Ling , Guo Shu Xia , Yin Peng , Wang Lei
Published: July 2013

In this investigation, a measurement system based on machine vision applied for auto-hubs eccentricity between the center hole and the pitch circle of bolt holes was proposed. The measurement system was integrated by a CCD camera with a telecentric lens, a diffuse bright-field back light illumination system, a rotating platform, a rotating encoder and an industrial computer. The camera was fixed at a suitable location from the rotation center, which ensured that one bolt hole and a part of the center hole could appear in its visual field. All bolt holes were shot when the auto-hub was rotating, while a rotary encoder recorded these angles. Then a global image of the auto-hub could be tiled by these pictures. An image-processing algorithm integrating morphology, circle fitting, affine transformation and edge extracting was used to measure the auto-hubs eccentricity. According to the measurement of a standard block that had 50um-eccentricity and was manufactured by WEDM-LS (Wire Cut Electrical Discharge Machining-Low Speed), the maximum deviation between measuring value and real value was less than 0.013mm, eccentricitys standard deviation was 0.0035mm and the standard deviation of eccentricitys direction angle was 2.37°. Meanwhile the experimental data of real auto-hubs gave an eccentricitys standard deviation less than 0.013mm and a direction angles standard deviation less than 2.1°.
Determination of Zearalenone in Corn by HPLC with Molecular Imprinting Affinity Purification
Authors: Pei Rui Li , Liu Jia Peng , Wang Ying
Published: July 2013

This article gives a contrast of molecular imprinting affinity purification method (by HPLC) and immunoaffinity column purification method (by HPLC) in the determination of zearalenone in corn. In the determination process, two levels (dosages) of 60μg/kg and 500μg/kg were used. Recoveries of by means of the two methods were 90.4%, 90.1% and 92.9%, 90.7% respectively. And the molecular imprinting affinity column can be reused several times.
Temperature Field Calculation of Anisotropic Crystal in the Photothermal Displacement Detection Theory
Authors: Zhang Ying Cong , Shen Hua , Zhu Ri Hong
Published: July 2013

Photothermal displacement technology is mainly applied in the measurement of the materials optical thermal parameters and the non-destructive testing. In order to study the optical thermal parameters of the anisotropic crystal, heat conduction equation of anisotropic crystal under a given temperature distribution is solved by using an integral transform method. The steady-state temperature field distribution of the crystal is obtained, which is simulated by Matlab and can be applied to the photothermal displacement technology to obtain the surface deformation to provides a strong theoretical basis for studying the optical thermal parameters of the sample.
Application of Fuzzy Comprehensive Assessment Method to Result Assessment of Basketball Professional Courses in Physical Academies
Authors: Zhi Gao
Published: July 2013

The paper discusses and researches the assessment method of graduation results for basketball elective course in Wuhan Institute of Physical Education preliminarily, by literatures and questionnaires. It is shown from the research results that the comprehensive assessment method based on fuzzy mathematical theory reflects the wide practicality and adaptability in the assessment of elective results in physical academies.
The educational assessment of physical colleges is conducted under a special circumstance. Over the last decade, lots of new ideas, new concepts, new models, and new methods of foreign education assessment have appeared, such as: alternative assessment, implementation assessment, and dynamic assessment. Some are more mature with feasibility and application value, some methods are cumbersome, lack of feasibility and universal. The paper pays the full attentions and makes calm analysis for the domestic and international development trends in the assessment, based on the scientific, practical, and innovative way. The discussed fuzzy comprehensive assessment method is a method that applies the fuzzy mathematics to educational assessment filed, which highlights the systematization of assessment index of students. It emphasizes the combination of qualitative assessment and quantitative assessment for a comprehensive, objective, and fair assessment of students' development, to describe the condition and progress of students more clearly and accurately.
Analysis of Influencing Factors on Performance of Rhythmic Gymnasts
Authors: Qiong Xu
Published: July 2013

The competition result of a rhythmic gymnast is dependent on the assessment of referees based on the athletic level of athlete at scene (including the difficulty, choreography, and quality of movements), and final ranking after comparing with the scores of other competitors. The paper proposes several factors which can affect the performances of rhythmic gymnasts including: the subjective factors such as scoring of referees, and also the objective factors such as athletic level of athletes at scene, competition conditions, competitors' conditions, etc.; and the paper also proposes the related countermeasures for above issues.
The Characteristics of the Long-Time Averaged Kinetic Energy of the Atoms in LJ Cluster
Authors: Ren Shi Wei
Published: July 2013

Using the standard microcanonical molecular-dynamics method, the behaviors of the individual atoms in the LJ clusters are investigated. It is found that the characteristics of the long-time averaged kinetic energy of the individual atom in the solid-like clusters are related with the symmetry of the clusters. Different symmetries result in different kinetic energy distributions over the atoms of the clusters.
Wide Frequency Band DC Corona Current Measurement and Analysis of Bundle Conductor Based on UHV Corona Cage
Authors: Lü Fang Cheng , Zhu Lei , Liu Yun Peng , Geng Qing Zhong , Zhu Jun , Dai Hang Juan , Xie Xiong Jie
Published: July 2013

A wide frequency band DC corona current measurement system is introduced in this paper. GPS technology is applied to make sure that the voltage and current signal are collected synchronously. The wide band corona current signal is transmitted to the lower computer by the wireless network of 300M/s. The wide frequency band DC corona current waveform was gained in the Ultra High Voltage (UHV) Test Base in Wuhan, which can reflect the high frequency pulses of the corona current, and corona currents of 6 bundle conductor LGJ630-45 in dry and rain (rain rate 20mm/h) conditions are gained. The corona current in the rain condition is much larger than that in the dry condition.
The Risk Measurement of the Space Launch Test Project Based on Gray Relational Analysis
Authors: Le Yao Dong , Wei Fa Jie , Liu An Ying
Published: July 2013

The special nature of space launch test projects requires ground personnel to reduce the occurring probability of risk and ensure the success of the projects to the greatest extents. Hence how to accurately identify, measure, control and manage risk through effective measurement is currently a focus of risk management for space launch test projects. This paper identifies risk factors in all the stages of the space launch test projects, and analyzes and sorts them based on the gray relational degree. The results offer advices for ground personnel to make more precisely identification and control of risk.
Identification Model in Frying Oil Based on Interval Partial Least Squares Regression Analysis
Authors: Zhao Ming Fu , Zhang Zheng Wei , Wang Nian
Published: July 2013

As we known frying oil belongs to waste oils when it has been excessive used, long time usage also cause serious effect. This paper chooses dragon fish oil which was fried 10 times excessively. We can extract the characteristic in absorption peak (323.391.443nm) of spectral absorption value as the dependent variable. Then build the interval partial least square model, Through the MATLAB, we can extract the optimum interval is 5 and the best factor of wavelength range is 7. Prediction of correlation coefficient for R is 0.998. By the cross validation verification Q22=-0.3461<0.0975, we can get the establishment of PLS equation as Y1, Y2, Y3. The model which we build can predict the content situation of characteristic absorption peak in frying oil effectively.
Fractal Ordering Nanostructured Planar Media
Authors: Kraynova G.S. , Frolov A.M. , Pisarenko T.A.
Published: July 2013

In this paper a method of characterization of network structures with multiscale hierachical periodicity in the spectral representation is suggested. The informodynamic analyses of the degree of similarity of complicated systems with different level of organization was established as the result of convolution of diffraction patterns. The indicator of the fractal dimension as the characteristic of degree of ordering of mesodefect systems of planar media was introduced. It is established that the rejection of the fractal dimension is observed under the increasing stochasticity of network system.
The Study of Non-Contact Measure Method for Deformation Based on the Digital Image Correlation
Authors: Li Zhi Guo , He Neng , Fan Ze Min , Liao Hai Li
Published: July 2013

Based on the application of the CSI non-contact full field strains and 3D displacements gauge made in USA in the laboratory for wind engineering of Southwest Jiaotong University, the theory of DIC, a non-contact deformation measurement method, is studied in the paper. The reliability of the method is testified by contrast tests. The paper also offers some useful advice byanalysing the factors that affect the measurement accuracy.
A Laser Tracking-Vision Guiding Measurement System for Large-Scale Parts Assembly
Authors: Sun Wen
Published: July 2013

To address the problems of low efficiency, high cost and low automatic level existing in traditional laser tracking measurement systems, a laser tracking-vision guiding measurement system for large-scale parts assembly is introduced in this paper. The system is composed of mono-camera and a laser tracker, can fulfill real-time tracking and automatic measurement throughout the whole assembly process. A global calibration method based on public planes and a method for finding the 3D positions of the target reflectors based on monocular vision measuring are expounded. Mathematical model is established, measurement system is built, and the experiment is accomplished. The experiment result indicates that the proposed system features relative high degree of automation and high measuring speed, has future in practical application.
A Method to Calibrate the Gauging Stations with PSD
Authors: Wang Xiao Feng , Ren Zhong Jie , Shen Hua , Li Jian Xin , Zhu Ri Hong , Huang Ya
Published: July 2013

Analyzing series images is the main method to clear up the attitude of High-speed target at present, and the coherence of the space coordinates of the image capture device is the key to solve the problem whether we can deal with those series images convenience. In order to make the capture ratio of the capture device high, and make the image processing convenient, Developed a method to demarcate the space coordinates of those gauging stations. Propose a method that using a semiconductor laser for a Imaginary benchmark straight line, Adjusting the position of the reference material with the optical system and position-sensitive detectors (PSD) to provide a benchmark for the space coordinate calibration of the gauging stations. We analyzed the measuring precision and repeatability of the method. The method is easy, high accuracy, high repeatability and widely used in many aspects.
Research on the Field Test Methods of Flow Rate and Water Level of Urban Drainage Pumping Stations
Authors: Feng Jian Gang , Bu Li Feng , Xu You Wei , Mao Bin
Published: July 2013

The flow rate and water level measure is one key work of the pumping station field test. And the reliable, applicable, economic and effective measurement method and instruments are the key decisive factors of the field test. The urban drainage pumping stations usually pump sewage, and its inlet structure and outlet structure generally use closed arrangement. These make the flow rate and water level measurement of the field test become complicated. Based on the characteristics of urban drainage pumping station, this paper analyzed the measurement methods of flow rate and water level parameters of the field test for urban drainage pumping station. In combination with a field test case for an urban drainage pumping station, this paper demonstrated how to choose the reliable, applicable, economic and effective measurement method to measure flow rate and water level parameters.
The Array Sensors for Consistent Through-Hole MFL Inspecting of Drill Pipes
Authors: Yang Yun , Zhang Hai Tao , Li Zheng Yan , Kang Yi Hua
Published: July 2013

The detection of through-hole with a diameter of 1.6mm and the consistency of its signal are the basic evaluation indicators to decide whether the drill pipe is available. The relative position of the defect and sensor is random during the actual detection, causing the difficulty that it is hard to ensure the signal consistency of through-hole detection. This paper begins with the analytical model of magnetic field leakage (MFL) for through-hole, using the coil to detect the tangential component of the through-hole MFL, with the single sensors signal shown by simulation. Experiments and numerical simulation were done for the 1.6mm through-hole to acquire the effective coverage of its MFL and the suitable spacing of array sensors. The experimental results are consistent with simulation, which could be theoretical guidance for the optimization of array sensors.
A Pre-Stitching Method to Manufacture Z-Pins Reinforced Woven Ceramic Matrix Composite Laminates
Authors: Liu Wei , Jiao Gui Qiong , Guo Jing , Jiang Hao Tian
Published: July 2013

Z-pins reinforced 2D ceramic matrix composites (CMCs), integratedly designed new materials, are developed to enhance 2D CMCs through-thickness in the form of Z-pins and to ensure significant increase in interlaminar fracture toughness, delamination resistance and impact resistance, and Z-pins reinforced 2D CMCs have much application. A manual pre-stitching method is developed to make holes in the graphite fixture to control Z-pins row spacings and to introduce yarns of 3000 T300 carbon fibers bundle into a preform. Z-pins reinforced woven CMCs for research were manufactured successfully by repeatedly using chemical vapor infiltration (CVI) to infiltrate SiC matrix into woven preform and carbon fiber sutures. It is shown that this method of manufactured Z-pins reinforced woven CMC is feasible.
Investigation on Fatigue Damage of the Al5Zn2Mg High Strength Aluminum Alloy
Authors: Sun Xian Liang , Tian Ai Qin , Chen Wen Bin , Ding San San , Yang Shang Lei
Published: July 2013

The fatigue fracture and the microstructure of Al5Zn2Mg high strength aluminum alloy were observed by OM, SEM and TEM, and the low cycle fatigue properties were tested and analyzed. The results of experimentation show that the low cycle fatigue life of Al5Zn2Mg high strength aluminum alloy is 9.28×104 cycle in R=0.1, f=8Hz, and σmax=0.75σb. The tensile strength is 444MPa. The fatigue fracture is composed of the initiation zone, the propagation zone, and the sudden fracture zone, which is characteristic of a mixed-type fatigue fracture. The fatigue crack initiates in the surface of Al5Zn2Mg aluminum alloy sample, while there is no fatigue striation in fatigue crack propagation zone. The η′(MgZn2) transitional strengthening phases are precipitated in Al5Zn2Mg aluminum alloy, and mostly distributed in grain boundary. The diameter of η′ strengthening phase is fine, about is 10nm. There is none precipitated zone in width nearby the grain boundary
The Processing Characteristics and Mechanical Properties of Semi-Prepreg RTM Composites
Authors: Li Wei Dong , Liu Gang , Hu Xiao Lan , An Xue Feng , Zhong Xiang Yu , Li Ye , Yi Xiao Su
Published: July 2013

A novel semi-prepreg resin transfer molding (RTM) process was developed to address difficulties associated with RTM process and to improve the mechanical properties of the resulting composites. Unidirectional semi-prepregs exhibiting relatively good overlay characteristics were prepared via prepolymerization of bismaleimide resin followed by wet winding. The processing characteristics and mechanical properties of composites fabricated via semi-prepreg RTM technology were compared with those of composites produced using a normal-prepreg compression molding process. Experimental results showed that the laminates fabricated by the semi-prepreg RTM process were of better internal quality and had superior mechanical properties as compared with laminates fabricated by the normal-prepreg compression molding process.
Experimental Investigation on Reduction Kinetics of Stainless Steel-Making Slag in Iron Bath Smelting Reduction
Authors: Zhang Bo , Niu Shuai , Chen Wen Bin , Li Wen Cai , Chen Fa Tao , Li Tao , Liang Li Sheng , Hong Xin
Published: July 2013

Reduction kinetics of stainless steel slag in iron bath smelting reduction was studied at the temperature of 1500°C ~ 1650°C. It was concluded that the reduction process consisted of two parts. That is to say smelting reduction was controlled by stainless steel slag melting initially and by interface reaction later. In order to increase smelting reaction rate, the melting point of slag should be decreased at the first stage and adjust the liquidity of slag at later stage. Smelting reaction rate will be accelerated by means of optimize the slag content. The optimal reduction result that all most all of the chromium in slag been recovered was obtained in temperature was 1500°C, basicity of slag was 1.0~1.2, the value of Al2O3+MgO was 25%.
Preparation and Characterization of Terpene-Based Diol from Terpene-Maleic Anhydride Using Lithium Aluminum Hydride as Reductant
Authors: Tang Xiao Dong , Xia Jian Ling , Li Shou Hai , Huang Kun , Li Mei , Lu Zhi Qu
Published: July 2013

A Diol with endocyclic structure that is 1-methyl-4-isopropyl-bicyclo [2,2,-2,3-two hydroxymethyl-5-Octene (MIBHO), deriving from terpene, was synthesized using the aid of lithium aluminium hydride (LAH) as reductant in THF media at 65 °C. The optimum synthesis conditions were confirmed by analysing the factors on reacting temperature, reacting time, different solvents and reductants. The molecular structure of the novel compound has been characterized by FT-IRGC-MS and 1H-NMR analysis. The data reveal that LAH could effectively reduce terpene maleic anhydride to corresponding alcohol, and the conversion rate of raw material could reach 84%.
Wear Resistant and Refractory Nonmetal Material of CFB Boiler
Authors: Liu Yan Ping , Liu Yang , Qi Ji Yu
Published: July 2013

The key in restricting CFB (circulating fluidized bed) boiler running was material selection, construction fixing, pouring, coating, structure designing and running mode of wear resistant and refractory nonmetal material. Based on the comparison of CFB boiler and PC boiler, this paper expatiated on the failure, abrasion mechanism, material capability and selecting material principle of wear resistant and refractory nonmetal material, pointed out mistakes of utility boilers material selection and arranged reasonable principle of selecting material from the angle of improving working life of boiler and enhancing wearing resistance property of boiler.
Experimental Study on Technical Difficulties of Botswana First Circulating Fluidized Bed Boiler during Loading Process
Authors: Zeng Guang , Zhao Sen Lin , Wei Lai , Huang Run Ze , Badirwang Modiri
Published: July 2013

For study of technical difficulties that make Botswana first CFB (Circulating Fluidized Bed) boiler can’t reach full load at beginning of loading process, first experiments were carried out as awful experimental cases to analyze influencing factors; Second experiments were carried out as tentative experimental cases to select useful solutions; Third experiments were carried out as targeted experimental cases to execute chose solutions. Results indicate that one prominent difficulty during CFB boiler reaching full load is that boiler operation bed temperature was too high which was a comprehensive effect with some other influencing factors. CFB boiler bed temperature MFT (Main Fuel Trip) set point slight increasing, grain size changing of both start-up material and feeding coal, limestone injecting, fluidizing air of seal pot and FBHE appropriate controlling and FBHE (Fluid Bed Heat Exchanger) gradually start working are taken simultaneously, all these effective solutions solve the technical difficulties and accelerate the boiler reach full load, but attentions still need to be paid for the boiler stable operation permanently in future.
The FEM Simulation of the Pressure and Fine-Blanking Quality
Authors: Wen Li Min , Li Qing , Wang Yi Min
Published: July 2013

A numerical model research of fine-blanking has been built up. The fine-blanking process of parts with pressure is 0KN20 KN40 KN60 KN respectively , thickness of plate 2.9mm and diameter 16mm,of steel 45, has been simulated. Through simulation, the study gets the material distribution situation of mean-stress fields in the progress of fine-blanking, and analyzes the relation between mean-stress fields and the crack of shearing zone. And get the pressure optimization value.
Electro-Catalytic Reduction Performance of La-Doped Nano-TiO2 Electrode
Authors: Yan Xiao Yun , Wang Feng Wu , Xu Mai , Xu Bo
Published: July 2013

Homogeneous and transparent lanthanum La-doped TiO2 nanocrystalline thin films were deposited on pure titanium substrates by sol gel dip coating method. The surface structures, morphologies and electrocatalytic activities of the prepared nano-TiO2 film electrodes were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Cyclic voltammetry (CV). The results demonstrated that the optimum molar proportion of La was 0.5%. This optimum La-nanoTiO2 electrode (Ti/0.5%La nano-TiO2) showed a higher electrocatalytic activity than the undoped nano-TiO2 electrode (Ti/nano-TiO2)
Application of Inverter in Elevator Group Control System Simulation Equipment for Teaching
Authors: Yang Zheng , Wu Li , Dong Xin Fa
Published: July 2013

In order to improve the operation of the elevator comfort, this paper uses the frequency conversion technology, PLC technology and field bus control technology. They can be used for both the single elevator control and elevator group control management. The system has good application flexibility. The control system can solve the problem of insufficient teaching devices in elevator group control system and forms a group control elevator simulation teaching system.
Research of Dynamic Weighing System Based on Multi-Sensor Data Fusion Technology
Authors: Wang Yan Xia , Bao Chun Hui , Fan Chun Ling
Published: July 2013

The multi-sensor data fusion techniques is discussed in dynamic weighing system based on the data measured from ultrasonic sensors, speed sensors, capacitive sensors and load cells. This new method can greatly increase the measure precision of the dynamic weighing systems, at the same time it can effectively reduce noise, vibration, electromagnetic interference and other environmental factors on the influence of dynamic weighing system measurement. Judging from the simulation result, this new method proves to be more accurate and stable than ordinary processing methods.
A Finite Element Simulation of the Surface Acoustic Wave Devices Based on Polarized Piezoelectric Ceramic
Authors: Cao Pei , Zhu Jia Lin
Published: July 2013

In this paper, the basic principles of the surface acoustic wave (SAW) formed in the periodically poled piezoelectric ceramic has been elaborated theoretically. The modal and harmonic analyses has been performed by utilizing ANSYS software for the periodically poled piezoelectric composite structure (adjacent piezoelectric polarization direction opposite) which composed by piezoelectric ceramic (PZT-4). The data of simulation result have been processed and obtained the following conclusion: the surface wave can be formed in the periodically poled piezoelectric domain with a relatively large amplitude, the motion track of each particle in the SAW is an ellipse by combined the transverse modal displacement and longitudinal modal displacement of each surface node. These conclusions are same as the theoretical values, the simulation results are very useful for designing SAW device with periodically poled piezoelectric ceramic.
A Study on Active Engine Vibration Control by Applying Hydraulic-Piezoelectric Mount
Authors: Yang Hang Xu , Wang Rui Min , Liu Dong Mei
Published: July 2013

Study of LMS control method on active engine mount is carried out for ride quality improvement. Take an active engine mount which is based and developed from a hydraulic mount with decoupled disc-membrane as a module, the characteristic of vibration isolation of active engine mount is simulated and analyzed. The results indicated that active engine mount could reduce the vertical vibration effectively with LMS Control method.
Study on Theory of Solid-Plug Conveying of Centrifugal Extruder by Experiments
Authors: Zhao Jing , Wang Lei
Published: July 2013

In this paper, a new polymer process machine--- centrifugal extruder is introduced. The performance of centrifugal extruder has been studied by experiments. The experimental analysis shows that the centrifugal force field can provide the solid-plug conveying pressure sufficiently and stably, which can prove the industry practicability of centrifugal extrude. By further discussion, it shows that the important influencing factors on the rotation velocity. And the conclusion is got that the theoretical analysis and the experimental result are agreement.
Experiment Research on Comprehensive Recovery of Carbon and Iron from Flue Dust
Authors: Nie Yi Miao , Wang Bin , Chen Miao , Liu Shu Xian
Published: July 2013

The properties of the flue dust of an iron-making plant and the results of separation experiment were given. The test results show that the flue dust could be enriched by gravity-flotation-magnetic separation technology to produce carbon concentrate and iron concentration. The results showed that 56% iron concentrate and 65% carbon concentrate could be got.
Thermal Stress Analysis of High Temperature Autoclave by ANSYS
Authors: Gao Hang , Li Yu Zhu
Published: July 2013

The comprehensive application and potential danger of high temperature autoclave was discussed. The influence of thermal stress of autoclave in the reaction process of prepare biodiesel was studied. Utilizing simulation software, visualization of the structure and security was finished and thermal stress mould of ANSYS was employed to analyze the thermal stress distribution and deformation of autoclave. After the 3D (3 dimension) autoclave body model was created by AutoCAD, ANSYS Multiphysics was used to simulate the change of thermal stress of autoclave. Taking direct method for example, the whole simulation process was introduced. Validating by some equipment necessarily, the results of analysis are credible.
Analysis on Lighting Source Configuration of Stadiums for College Physical Education
Authors: Li Shu Fang , Niu Shuang Guo
Published: July 2013

Based on the analysis on architectural characteristics of the training facilities for college physical education and in the light of lighting design standard for sports buildings, we designed the lighting uniformity for college physical education facilities with high demand for ground light and relatively low requirements for vertical lighting. It has been demonstrated through experiment and verification on corresponding illumination, power, energy efficiency of commonly used high voltage sodium lamps in the range of 187V-234V in electro-optic experiments, that college physical education training facilities should adopt the high-voltage sodium lamp as the electric light source.
Design and Simulation of Scalable Plastering Machine Based on Virtual Prototyping Technology
Authors: Li Zhen , Shang Xiao Jing
Published: July 2013

Design a scalable plastering machine for the traditional plastering machine problems in the structural design. On the basis of the three-dimensional solid model established using PRO / E, we make the simulation for the institutions overall course of the campaign through using ADAMS, to detected design products by experience whether meet the actual requirements or not, but also provide a theoretical basis for the optimized design of wall plastering machine in the future.
Design of Power Quality Monitoring System Based on PV Grid-Connected Inverter
Authors: Huang Ding Jin , Yan Yang
Published: July 2013

As widely use of photovoltaic grid-connected inverter, it had been more and more important to monitor its influence to public grid in real time. This paper introduces a detecting method of power quality indicators. Power quality monitoring system is designed by dual-DSP designs (TMS320F28335), which has high-precision and high-speed floating-point operation ability, and integrates with lots of hardware resource. At the same time, the article introduces the main hardware circuits, and the block diagram of software.
Comparison of Permanent Magnet Linear Synchronous Motor Characteristics Fed by SPWM Inverter and Sinusoid Voltage Source
Authors: Xu An Feng , Hu Qing , Gao Cai Xia
Published: July 2013

Permanent Magnet Linear Synchronous Motor (PMLSM) characteristics are deteriorated seriously by amount of time and space harmonics, which are arisen respectively from the inverter comprised array switches, the motor teeth-slots and distributed windings. The paper presents field-circuit coupled adaptive time-stepping finite element method to comparison research on PMLSM characteristics fed by SPWM voltage inverter and sinusoid supply. The co-simulation is used with the status space functions and time-step finite element functions. The simulation results of PMLSM fed by SPWM voltage source inverter and S-VS were compared and analyzed.
Current Limiting Reactor's Reactance Value Selection Based on Short-Circuit Transient Analysis
Authors: Zhao Tie Ying , Wang Yan Wen
Published: July 2013

Current limiting reactor can increase systems short circuit impedance so as to limit short circuit current. Current limiting reactor is directly involved in whole short circuit process when a short circuit fault occurs in a power system, which makes short-circuit current change more complex. Short circuit current level is affected by current limiting reactors parameters; a current limiting reactor with proper impedance value can maintain short-circuit current at an acceptable range. A short circuit transient process of a distributing network with current limiting reactor was analyzed, and the formula of current changing in short circuit transient process was deduced; according to the current changing formula, an engineering calculation formula of current limiting reactors impedance was derived. The case calculation shows that current limiting reactor meeting the need of the engineering calculation formula can reach the system current limiting requirement.
Study on Mission Environment-Oriented Materiel System
Authors: Shen Ying , Cao Jun Hai , Wu Wei , Wu Jun Wei
Published: July 2013

It sets up the system structure model of materiel system reliability simulation based on Adaptive Agent in the paper, emphasizes the devising thinking on SA, and not only provides the devising thinking and reference on other Adaptive Agent in the system structure model, but also establishes a base on a better operational and current reference technology model which helps to mission environment-oriented reliability analysis for materiel system. So by constant improving, it realizes for materiel system to simulate reliability operation in complex environment.
Diesel Engine Fault Diagnosis Based on Rough Sets
Authors: Pan Hong Xia , Tian Jing Yi
Published: July 2013

This paper introduces the rough set theory and ROSETTA software characteristics, gives a diesel engine fault diagnosis system based on rough set theory and the vibration signal of cylinder head. Taking a certain type large power diesel engine as an example, the first to be extracted from the cylinder head vibration signal wavelet packet de-noising and time-frequency domain analysis, constructed eigenvalue for fault diagnosis, then use ROSETTA software reduction feature attributes, finally completed fault pattern classification through the neural network. By comparing the output results of the neural network before and after processing by the ROSETTA software, show that rough set theory can optimize the feature attributes, effectively reduce the input of the neural network nodes, and improve the fault classification accuracy.
Study of Built-In Electric Field and Migration of Carries in Thermal/Electric-Field Poled Fused Silica
Authors: Dai Zheng Quan , Duan Jin Yan , Wang Jian , Li You , Ren Yi Tao
Published: July 2013

The thermal/electric poling process of fused silica glass is analyzed based on the multi-carriers model. The carrier continuity equation is applied to calculate the variation of the carrier concentration with time. The border of positive charge and negative charge is analogous to a p-n junction. Calculation of the built-in electric field is based on the Poisson equation. The result shows that the second-order nonlinearity effect is mainly formed by the Na+ depletion in the poled fused silica glass. The non-linear coefficient is calculated, it is agree well with the literature values, which verifies the reliability of the theory. The study provided theoretical foundation for manufacture optical communication components.
Design and Implementation of SRM Drive System
Authors: Song Shou Jun , Wang Lu Sheng , Zhang Zhi Hui
Published: July 2013

In this paper, the basic operating principles and control methods of switched reluctance machine (SRM) are described briefly. Then, the drive system of a 3-phase SRM is designed and implemented. The design process includes two main parts: hardware and software. In hardware design, the structure and working principle of digital control and power drive circuit are presented. In software design, the program flow chart is provided, and details of each functional module are given as well. Finally, many experiments are carried out to verify the dynamic performances of the system. The phase current under different control methods, speed variation curve under closed-loop control and the mechanical characteristics of the system are given. Experimental results show that the designed SRM drive system has good speed adjusting ability and strong robustness.
Implementation of High Accuracy DAC Controller Based on HRPWM in TMS320F2806x
Authors: Fan Ke , Deng Hui , Wang Feng
Published: July 2013

This paper proposes method for utilizing the on-chip high resolution pluse width modulation (HRPWM) as a digital-to-analog converter (DAC). The thesis detailedly discusses the basic principle of the design and analyzes the courses of affecting DAC output accuracy.It described the hardware design and the software design ideas. The experimental data shows the effectiveness of the proposed method.
Design on Fuzzy Controller of DC Motors Speed Control Based on DSP
Authors: Zhang Peng Jie , Guo Ji Hong , Ma Hong Jing , Ma Hong Ming
Published: July 2013

Aiming at the problems of nonlinearity, time-variant parameters, and uncertainty of system mathematical model in the PID regulator of DC motor control, a fuzzy controller of DC motor speed control based on TMS320LF2407A is designed in this paper, using the fuzzy control strategy to control, and its design procedure is described. The experimental results show that the speed control system of DC motor by using DSP controller and fuzzy control algorithms has a fast response, slight overshot and good stability, and improves the control effect.
Study on Carrier Frequency Control of AC Servo System Based on SVPWM
Authors: Zhang Shi Xiong
Published: July 2013

In this paper, the synthesis principle and realization way of voltage space vector in three-phase AC servo systems base on SVPWM are analyzed firstly; After that, the constraint relation between carrier frequency and all factors of operation conditions, and the theoretical relation of system restrained under the condition of high carrier frequency and low carrier frequency are deduces; At last, a carrier frequency modulation scheme based on the theoretical relation to make carrier frequency change with operation conditions is proposed in order to take full advantage of power devices and improve system performance. Experimental results show that the proposed scheme is feasible and effective.