bluuebunny/crossref_metadata_2025 huggingface dataset:
Data Acquisition and Transmission in Tracking Control System
Authors: Zhao Ding Yuan , Yang Hong
Published: January 2012

In tracking control system, control precision is influenced by the generation of control signals and precision of control is affected by data acquisition. Signals are easily interfered by environment after data acquisition．Therefore transmission standards and communication protocols are crucial links．Related links of this system was analyzed and discussed in this paper．
Control Strategies on Yalong Bay Ice Storage District Cooling System
Authors: Sun Yu Ying , Zhao Yao Hua , Wang Ying Jie , Hu Yan Ting , Ni Yong Feng
Published: January 2012

Yalong Bay ice storage district cooling system is a very high degree of automation system, the stategies of which are detailed analyzed in the artical from three parts: refrigerating system, chilled water distribution system and user cooling exchange system. For the benefit of the environment and the oprerating efficiency of power grid, these control strategies are designed on cooling demand and peak load shifting. Now they have been successfully applied to Yalong Bay DCS, through the three control hierarchies: local control, centralized management and optimizing control. The artical has reference value for design on ice storage district cooling system control.
Current Compensation Control Strategy for Reduction Normal Force Ripple of PMLSM
Authors: Ning Jian Rong , Wang Cheng Yuan , Xia Jia Kuan , Shen Li
Published: January 2012

The ripple normal force of permanent magnet linear synchronous motor (PMLSM) can directly deteriorate the machining accuracy of ultra-precision CNC machine tool which use linear motor direct drive. First, the normal force of PMLSM was calculated using finite element method (FEM) .then, id current compensate lookup table was established by indexing iq current, gap and position of mover .In order to reduce the ripple of normal force and keep the thrust steady, PMLSM current compensation control system was realized by injecting the id current to counteract the normal force ripples using field oriented control (FOC) method. The effectiveness of this proposed method is verified by the simulation using Matlab according to the comparison between the compensation and no compensation cases.
Gobal Optimization Based Power System Stablization with WAMS Time Delay Study
Authors: Lin Zhang , Liu Di Chen , Jun Wu , Liao Qing Fen , Lei Yun , Dong Fei Fei
Published: January 2012

It is very important to take into consideration time delay in wide area power system stability; the design of PSS (Power System Stabilizer) should consider global optimization with WAMS (Wide Area Measurement System) time delay. Newly designed PSS should be insensitive to time delay and suppress internal low frequency oscillations. It is used as feedback signal and is real-time synchronous that WAMS signal shows. Power system is modeled with the consideration of time delay. LMI (Linear Matrix Inequalities) is used to solve the stability condition of time delay system. Based on the time-delay effect of the wide-area measurement signals, this paper redesigned the PSS with global optimization of power system. The attached two-area-four-machine system simulation illustrates that wide-area PSS designed by global optimization with the consideration of time-delay can limit internal low frequency oscillation with time-delay insensitivity, and improve the stability of power system. It implements global optimization of PSS with WAMS time delay stability.
Research and Realization of Facial Expression Robot
Authors: Zhang Yu , Yang Kuo , Deng Xue Ying , Shi Ying
Published: January 2012

By analysing the formation mechanism of human facial expressions and summary of existing research about facial expression robot, the paper summarized the facial expression robot, developed three technical difficulties, and proposed the improvements according to the technical difficulties. Based on the above, the paper presented one facial robot with eight facial expressions of basic emotions. In mechanical part, the mechanical structure with 20 degrees of freedom is designed; in control part, SSC32 V2 is used to control 20 servo coordination movements; in simulation modelling part, a special silicon rubber material is developed and the soft part of material is used to as the skin of facial expression robot. The facial expression of robot substantially increased the extent of such robot simulation.
Economic Analysis on the Combined Power/ Refrigerating Cycle for Power Plant Air Cooling System
Authors: Chen Li Jun , Mi Li Jun , Xu Chao , Yang Shan Rang
Published: January 2012

At present, the development of power industry is facing the pressure of energy saving and emission reduction. This paper reviewed briefly the strategy for development in optimizing power cycle and improving comprehensive utilization of heat energy. A economic analysis was made to the combined power cycle/refrigerating cycle air cooling system (hereinafter called ‘combined cycle air cooling system’ or ‘CCACS’) which presented previously and estimated its contribution to energy saving and emission reduction in this paper. An analog computation example shows that the combined cycle air cooling system based on the compression refrigeration is feasible and effective. Finally this paper pointed out that the air-cooling system is facing the re-selection under the new situation, the indirect air-cooling system will be of importance to the development, and the combined cycle air cooling system will become a kind of new options.
Research on Flat Earth Removal Techniques of INSAR
Authors: Li Jia , Xin Jia
Published: January 2012

As a new microwave remote sensing technique, synthetic aperture interferometry has been developed rapidly in last thirty years. It is based on synthetic aperture. The imaging algorithm of the synthetic aperture radar interferometry (INSAR) is introduced. Two approaches of flat earth removal are derived and compared. The influence of the flat earth removal processing to the interformetry phase statistics distribution and phase derivative is analyzed. The results indicate that the flat earth removal technology makes the phase unwrapping easier and improves the precision of it.
Versatile Gate for Artificial Neural Network Circuit
Authors: Rahman Abul Hasanat Muhammad Jahanur
Published: January 2012

versatile gate is a multipurpose device, which can be transformed into any types of gates, amplifier, differentiator, and integrator. It has control inputs which guides transformation of this device. This implies that any chip made of this device can change hardware structure just by using software program. This enables hardware upgrading without buying new chips. This reduces electronic wasteland, which proves that it is very ergonomic and environmental friendly.
Design of Solid Mounted Components Using Bulk Acoustic Wave Technology for Communication
Authors: Venkatalakshmi B , Radhika K
Published: January 2012

Low power and portable systems working at high frequency are becoming a significant force in the communication industry. SAW filters have been used in wireless communication systems since the early days of mobile phones. But applications at the higher handset frequencies run up against the capability of conventional SAW structures. Bulk Acoustic Wave (BAW) Technology, a relatively recent addition to this portfolio follows MEMS principle to design high performance microwave components for RF communication. Simulation of the Bulk Acoustic Resonator using Butterworth Van Dyke Model (BVD) Model and design of Ladder Filter with the designed resonator in the RF design platform Agilent ADS (Advanced Design System) have been presented. The simulated results confirm the tuning of operating frequency of designed BAW device at 2.4 GHz.
Removal of Hexavalent Chromium and Turbidity in Drinking Water by Chitosan
Authors: Li Shao Xiu , Lian Yu Qiang , Mai Jian Feng , Tan Jian Xiong , Hu Shu Jie , Xia Wen Qin , Duan Wei Wei
Published: January 2012

The threat of heavy metal pollution in water sources becomes increasingly serious. Toxic hexavalent chromium is harmful for health. Chitosan is a non-toxic and pollution-free substance, it is a cationic coagulant after protonated in diluted acid solution, it also can complex for many heavy metal ion. The study on removal of Cr (Ⅵ) and turbidity in drinking water by chitosan in this paper was performed. The results showed that the removal efficiency of Cr (Ⅵ) decreased with increasing pH, the removal rate of Cr (Ⅵ) was as high as 100% at pH4 using the chitosan concentration of 1.0g/L, but in these conditions, the turbidity was not removed. The removal efficiency of Cr (Ⅵ) bore relationship to stirring time of slow mixing step and initial concentration of Cr (Ⅵ). The best stirring time was 4 hours. To attain a good removal efficiency of Cr (Ⅵ), the dosage of chitosan must increase with the initial concentration of Cr (Ⅵ) increasing. At pH7, low chitosan dosage had good turbidity removal.
Cytochrome P4501A (CYP1A) Expression in the Liver of Feral Common Carp (Cyprinus carpio) Inhabiting a Nitrotoluene Contaminated Site
Authors: Xu Jing Bo , Jing Nan
Published: January 2012

As a result, CYP1A expression in fishes is frequently used as a biomarker of exposure to aromatic hydrocarbon contaminants and early biological effect. We determined EROD activity and cytochrome P4501A protein level in liver of feral fish, common carp, Cyprinus carpio inhabiting a nitrotoluene contaminated environment in this study. The results show that feral C. carpio caught from contaminated water(nitrotoluene)in Songhua River displayed induction of CYP1A at two levels of expression, namely, apoprotein level and catalytic activity in liver.
Optimal Allocation of Heat Exchanger Area for Vapor-Compression Heat Pump Plants
Authors: Li Xiao Ming , Yang Zhi Qiang , Shi Xiu Ji , Shi Yue , Zhang Qiang
Published: January 2012

In order to optimize coefficient of heat pump, the finite time thermodynamic optimization theory is applied in this paper. By introducing area ratio of the condenser and evaporator, the analytical expressions for the optimal allocation of heat exchanger area for the irreversible Carnot heat pump with variable-temperature heat reservoirs are derived. For illustration, a real vapor compression heat pump example is utilized. Empirical results show that the optimal values for real vapor-compression heat pump cycles are obtained when area ratio is equal to 0.916. The results can guide the evaluation of existing heat pump plants or influence design practice for future plants.The results can guide the evaluation of existing heat pump plants or influence design practice for future plants.
Custom Contoured Cushion: A Finite Element Analysis
Authors: Singare Se Kou , Zhong Zhou Yan , Xu Guang Hui , Zhou Jiang Jun
Published: January 2012

A good chair cushion not only provides comfort but also control the posture and to reduce the risk of pressure sore occurred. The purpose of this study was to evaluate the mechanical interaction between the cushion and user of wheelchair. The buttock model geometric, individual data’s of healthy male subject were acquired by 3D reconstruction form laser scanner, while the custom made cushion design based on the Tekscan Clinseat pressure assessment system data. A standard clinical experiment protocol for the collection of interface pressure distribution was developed. The pressure distribution data of buttocks-cushion interface was collected when the subject sat on an initial cushion. According to the pressure distribution data and parameters of cushion material that was acquired in the material test; an individual mathematics model was built and then transferred into CAD software to create the CAD model of the cushion deflection geometry.
A Novel Bus Protection Based on Morphological Top-Bottom-Operator
Authors: Shu Hong Chun , Dai Yue Tao , Tian Xin Cui
Published: January 2012

A novel transient component bus protection based on morphological bop-bottom-operator is presented in this paper, which takes the max top-bottom-operator of current traveling wave to fast distinguish the bus internal fault from external fault. The method is based on the principle that the high frequency component of transient traveling wave caused by external fault will be attenuated by the bus capacitance but the traveling wave caused by bus internal fault changes slightly. Simulation is carried out with PSCAD/EMTDC, the result verifies the bus protection is reliable and accurate. The novel bus protection also can treat lightning failure or lightning disturbance happened on transmission lines as bus external fault, without malfunction. Introduction
Design of the Telemedicine ECG Monitoring System Based on GPRS
Authors: Cui Rui Xue , Bi Ya Jun
Published: January 2012

This paper introduces the design of telemedicine ECG monitoring system based on GPRS.This system combined holter monitoring technology and advanced wireless public communication network, which realizes user outside the hospital can be achieved by heart disease remote real-time monitoring function.This paper firstly introduced the structure design of this system, and then the electrocardio monitoring terminal, the communication circuit as well as the software and hardware of monitoring centers respectively. Clinical experiments showed that this system can realize remote real-time monitoring, and has important clinical significance.
Construction of Green City Development Strategies in Shenyang City
Authors: Li Jun Jing , Li Meng Ling , Cheng Wei
Published: January 2012

This paper describes the creation of the national environment in Shenyang city in the process model, green city status and created some problems, and analyzed the causes of these problems, finally, to solve the problems of the measures proposed.
Effect of Cellulase Hydrolysis on Dyeing Properties of Linen
Authors: Kan C.W. , Yuen C.W.M. , Lam Y.L.
Published: January 2012

This paper investigated the effect of cellulase on dyeing properties of linen fabric. Acid cellulase of different concentrations was used for treating linen fabric with and without simulated mechanical agitation. After the cellulase treatment, linen fabrics were dyed to different depths, with two reactive dyes (one was bifunctional and the other was monofunctional). Results revealed that colour yield was reduced as shown by K/S Sum value in relation to the increased enzyme concentration and mechanical action. The X-ray diffraction analysis revealed that crystallinity ratio was increased with increase in amount of enzyme used in the treatment. Colourfastness to crocking and laundering were improved after enzyme treatment.
Preparation of PNIPAAm Grafted Cotton via O2 Plasma and its Thermal Sensitivity
Authors: Li Yong Qiang , Liu Ting Ting , Liu Jin Qiang
Published: January 2012

A temperature-sensitive N-isopropylacrylamide (NIPAAm) grafted cotton fabric was prepared by the plasma-induced graft polymerization technique. The surface morphology of the grafted fabric was observed from field scanning electron microscopy (FSEM). Fourier transform infrared spectroscopy (FTIR) and DSC were used to characterize the structure and thermal property of the grafted fabric. The results showed that the PNIPAAm was grafted onto cotton fabrics. The DSC analysis results indicated that LCST value of the grafted fabric was around 32 °C. The water permeation flux of the grafted fabric varied dramatically with a slight change at temperature around the LCST, which showed that the grafted PNIPAAm could act effectively as a chemical valve to control the on-off behavior of cotton fabrics.
Antibacterial Efficiency and Cellular Toxicity of PET-Based Hollow Fibers Containing Silver Particles
Authors: Lin Ling , Chen Yun Neng , Gong Wen Zhong , Wang Shan Yuan
Published: January 2012

This work focuses on antibacterial efficacy and cellular toxicity of PET-based hollow fiber with silver particles incorporated (Ag/PET hollow fiber), which was synthesized by differential pressure method. Escherichia coli (E. coli) were used to investigate the antibacterial capability of Ag/PET hollow fiber with antibacterial kinetics experiments. The antibacterial results demonstrated that Ag/PET hollow fiber had an excellent antibacterial property against E. coli and the efficacy was dependent on several aspects including fiber length, weight and silver content. The cytotoxicity of Ag/PET hollow fibers on WI-38 cells was assessed using Methyl Thiazolyl Tetrazolium (MTT) assay, and the results showed no significant toxicity to WI-38 cells. SEM images of WI-38 cells treated by Ag/PET hollow fibers showed that cells morphology was unaltered in the presence of Ag/PET hollow fiber. However, abnormal size, shrinkage and rounded appearance of cells at higher dose suggested slight toxicity of Ag/PET hollow fiber. Combining the antibacterial and cytotoxic results, it was found that there was a certain concentration of silver ions which can achieve a minimization of cytotoxicity and a maximization of antibacterial efficacy.
Applying Syntan to Improve the Solid Effect of Silk/Wool Blends Dyed with Acid Dyes
Authors: Sun Sha Sha , Chen Na , Yao Fang , Tang Ren Cheng
Published: January 2012

Silk is blended with wool to make high-class apparel, contributing luster and strength. For the dyeing of silk/wool blends, the solid shades are usually required. However, the apparent color strength of dyed wool is generally higher than that of silk, which must be improved through the selection of dyes employed as well as the control of pH and dyeing temperature. In this paper, a novel approach of syntan application to improving the solid effect of silk/wool blends dyed with acid dyes was investigated. The influence of syntan on the distribution of different acid dyes in silk and wool as well as the apparent color strength of two fibers was determined. The mechanism for syntan to improve the solid effect was discussed according to the behaviors of syntan adsorption on silk and wool as well as fiber structures.
Lipase Immobilization on Functional Group Controlled Surfaces
Authors: Ye Peng , Wang Xin Ping , Han Zhu Ping , Yang Jie , Wan Rong Bing
Published: January 2012

A simple means was demonstrated to control the functional group on surface and use this surface as a model support to investigate the effect of surface chemistry on lipase adsorption and its activity. It was based on mixing polystyrene (PS) solution with small molecular weight functional group-terminated polystyrenes (PS-Fs, functional groups such as-CH3, -CF3, -NH2, -COOH and-OH) and casting them on glass plates to fabricate the functional group controlled surfaces. The amount of adsorbed lipase on the surface with similar functional group density was-CH3> PS > -CF3> -NH2> -COOH > -OH. The activity retention of the immobilized lipase was-OH > -NH2> -COOH > -CF3> -CH3> PS.
Reflux Extraction of Aloetic Anthraquinone
Authors: He Zhi Peng , Wu Zan Min , Han Yu Yang
Published: January 2012

Using ethanol as solvent, reflux extraction of aloetic anthraquinone compounds was studied. The single-factor orthogonal experiments were conducted to optimize extraction process and the extractive was identified using infrared spectroscopy. The results suggested the best extraction conditions: ethanol concentration 70%, extraction temperature 333.15K, extraction time 25 min, bath ratio 1:1.5. This simple and effective extracting method is in accord with current energy-saving, environmental protecting trends, and its product has wide application prospects for preparation of health-care textiles.
Dyeing of Polyester/Cotton Blends with Encapsulated Disperse/Reactive Dyes for a One-Bath Auxiliary-Free Process
Authors: Meng Chun Li , Wang Yan Wei , Cao Ji Liang
Published: January 2012

Research onthe one-bath dyeing process of encapsulated disperse dyes and reactive dyes on polyester/cotton blends showed that through the suitable modification before dyeing, polyester/cotton blends could be dyed with encapsulated disperse/reactive dyes in an auxiliary-free, one-bath method. The dyed goods attained excellent levelness and fastness. The residual dye in the final baths were very low. Thus, cleaner dyeing production and environment protection can be realized.
Dyeing of Pearl Fiber by Walnut Peel Dye
Authors: Dong Chao Ping , Dong Jie , Xia Jian Ming
Published: January 2012

This paper studied the metachrome process of an optimal dyeing method by comparing the color and fastness of walnut peel extract applied on the pearl fiber with ammonium ferrous sulfate as mordent. In addition, the paper also ascertained the reasonable dyeing process, that is, pH 9, walnut peel extract (the dye) dosage 200 ml/L, mordant (ammonium ferrous sulfate) 2.5 g/L, temperature 80 °C, time 60 min and liquor ratio 1:30, through analysis on single-factor experiments and orthogonal experiments by taking K/S as an evaluation index for the dyeing effect. The results showed that a better effect is achievable by dyeing the pearl fiber with walnut peel dye through the metachrome process.
Comparative Effect of Hydrophilic and Lipophilic Nanosized Titanium Dioxide on the Properties of Coated Paper
Authors: Tang Yan Jun , Chen Man , Li You Ming , Zhao Yu , Zhang Xiu Mei
Published: January 2012

In this paper, the effect of the charge of hydrophilic and lipophilic nanosized TiO2 on the optical properties and printability of coated paper was investigated. The parameters including brightness, opacity, surface strength and sizing degree were used to evaluate the optical properties and printability of coated paper. The effects of hydrophilic and lipophilic TiO2 on the properties of coated paper were discussed. It was shown that the optical properties and printability of coated paper increase persistently with the change of nanosized TiO2 charged from 5% to 15%. Once the charge of nanosized TiO2 was over 15%, the main properties of coated paper took on a downward tendency. The properties of coated paper were related to the surface properties of nanosized TiO2 samples. It was found that the lipophilicity of nanosized TiO2 sample played a more important role in the improvement of the coated paper properties, which was believed to be based on the fact that lipophilic nanosized TiO2 could be well compatible with the binders used in the paper coating.
Extraction of Bamboo Nanofibers Using Acid Hydrolysis for Functional Chemicals of Ecological Dyeing and Finishing
Authors: Zhang Yong , Xue Guo Xin , Zhang Xiu Mei , Tang Yan Jun
Published: January 2012

In this work a study on the feasibility of extracting cellulose nanofibers from bamboo fibers, by means of three different procedures was carried out. These processes included the using of three different types of acids (H2SO4, HCl, and a mixture of H2SO4/HCl). The raw bamboo fibers were mercerized with NaOH solutions. They were then submitted to the three different acid hydrolysis processes. The final bamboo nanofibers were morphologically characterized by transmission electron microscopy (TEM) and their surface charges in suspensions were estimated by Zeta-potential. Their degree of polymerization (DP) was characterized by viscometry and the crystallinity was tested by X-ray diffraction (XRD). All bamboo nanofibers presented a rod-like shape, an average diameter (D) of 6-10 nm and length (L) of 100-180 nm, with an aspect ratio (L/D) of around 16-18. The aggregation state increases with the amount of HCl introduced into the extraction, due to the decrease of surface charges. However, this release presented nanofibers with litter better degree of polymerization than those whose acid hydrolysis was carried out using only H2SO4.
Development of Eco-Friendly Colouration Processes for Textiles
Authors: Carr Chris
Published: January 2012

The textile industry is under continuous pressure to develop and implement eco-friendly processes that offer high performance, acceptable costs and minimal environmental impact. Water is the processing medium to colour textiles and its use incurs a significant cost in terms of acquisition, purification, heating, rinsing, drying and disposal. In this study we examine the problems and potential solutions associated with water-based colouration, the application of pigment dyeing systems and the effect of fluorocarbon finishes and plasma processing on improving their surface and bulk properties.
Technology Forecasting Methods with Emphasis on Bibliographic Analysis and Curve Fitting: A Photocatalytic Case Example
Authors: Jaranyagorn Promsak , Chansa Ngavej Chuvej
Published: January 2012

Technology forecasting methods can be applied to make sure we know the potential direction, characteristic, state and effect of technology change. A good forecast can maximize gain and minimize loss from future conditions Nowadays, many companies invest a great deal in R&D to develop competitive new products and technology. Globalization and the rate of technological change in highly competitive market mean that companies need to consider increasing the R&D budgets and ensuring the money is spent efficiently and effectively. Technology forecasting is very useful for decision making in managerial issues. It can help government manage their public agendas and budgetary constraints and for business strategic direction and prioritizing R&D projects. This paper explores the technology forecasting methods and demonstrates the use of bibliographic analysis and curve fitting with Bass diffusion and exponential models for trend forecasting of titanium dioxide photocatalyst as a case example.
Design and Fabricate InGaAlAs Quantum Well Device for Future Optoelectronic Integration
Authors: Li Te , Hao Er Juan , Wang Yong , Lu Peng , Qu Yi , Liu Guo Jun
Published: January 2012

InGaAlAs multiple Quantum Wells (QWs) on InP substrate were designed for the loss compensation of surface plasmon polaritons (SPPs). Quantum well material, number of the quantum well, composition and other details of the wafer were discussed. The wafer was grown on n+ InP substrate by metalorganic chemical vapor deposition. Electrical-pumped device was fabricated by conventional III-V processes and e-Beam lithography (EBL) technology. When forward voltage is added on the device, it is observed that the propagation length of long-range SPPs decreases with increasing gain coefficient and the gain of the quantum wells at 1.55μm assist the propagation of SPPs.
Fatigue Strength Analysis of Internal Combustion Engine Crankshaft Based on Dynamic Simulation
Authors: Liu Na , Li Guo Xiang , Lang Shuai Guo , Hu Yu Ping , Liu Xiao Ri
Published: January 2012

This paper established multi-body dynamic model of block-crankshaft system by method of finite element substructure and multi-body dynamics, and carried out the distribution of dynamic stress acting on the crankshaft in a working cycle and on this basis carried out the fatigue strength analysis, then received the fatigue safety coefficient and fatigue life data of each part of the crankshaft.
Research on Educational Methods of High-Quality Medical Students Based on Tacit Knowledge Construction
Authors: Liu Zhi Guo , Wu Shu Yong
Published: January 2012

Quality education is the central task of medical education. In this paper, by using tacit knowledge and the constructivist theory of knowledge, the writer proposes a specific method for quality education of medical students through discussing constitution of the qualities of medical students and analysing construction mechanism comprehensively.
Surface Emission of InxGa1-x N/GaN Espaliers Grown by MOCVD under Different Optical Excitation
Authors: Zhu You Zhang , Liu Yan , Wang Hong Xia , Sun Zhen , Yuan Jin She
Published: January 2012

Photoluminescence properties of InGaN film grown on sapphire substrates by metal organic chemical vapor deposition(MOCVD) was experimentally Investigation. The x-ray diffraction(XRD), transmission spectra, PL spectrum were used. The result of XRD shows that the mole composition of In in the InGaN film is estimated be 0.2 approximately. The band gap of the sample is calculated to be 2.66eV. A clear oscillation from F-P cavity could be observed on transmission spectra. There are three main peaks from the surface emission InGaN espaliers being excited on different light sources and different excitation power density. which can be explained the broad PL come from the difference of In composition modulated by was modulated due to F-P cavity arising from surface of sample. . It is found that there is some relationship between the position of the peaks in the PL spectra, the wavelength and intensity of power density and the F-P cavity.PACS: 73.61.
The Research of Face Recognition Method Based on Wavelet Transform
Authors: Bi Li Hong , Ma Yan Fang , Piao Li Hua
Published: January 2012

Face recognition is a kind of biometric identification technology possessing great development potential, researching on this technology has great theoretical values. The paper presents a method of image block principal component analysis (PCA) based on wavelet transform. The image was firstly disposed by wavelet transform and segmented, then we set the different weight values for each of parts according to the different role in the overall image and extract eigenvector using the PCA, finally, the face image is recognized according to the eigenvector and feature. This method can improve the speed and accuracy, reduce the complexity of feature extraction and improve the speed of recognition.
Application Research of Computer Technology in the Decision Making of China's Supermarket Logistics Centers
Authors: Teng Yue
Published: January 2012

Logistics centers are mainly comprised by a series of operations from purchasing of goods to preservation, allocation, delivery, packaging and distribution. By drawing support from advanced management technology and modernized information exchange network, logistics centers have effectively connected production and consumption altogether, making all goods circulating under an efficient, harmonious and ordered state, which in return achieved best commercial efficiency and social efficiency. Currently, logistics management software is far from enough to satisfy customers' needs, and still remains on the level of purchase, sales and inventory management. This research is conducted in allusion to the actual situation of China's information-based logistics industry, with the objective to improve modern management level of logistics industry. According to the demands of domestic logistics enterprises, we employed OLAP technology for data processing, and data mining technology in decision-making analysis, which realized information-based management in logistics centers. On this basis, we realized basic purchase, sales and inventory management. Furthermore, we as well created the data warehouse, so as to perform online analysis, processing and data mining, to realize intensive processing of data, as well as to provide support for decision-making. Computer-aided decision-making software is the development direction of management software.
The Influence of Cutting Parameters on Machined Surface Microhardness during High Speed Milling of Titanium Alloy TC17
Authors: Tian Wei Jun , Li Yu , Yang Zhen Chao , Yao Chang Feng , Ren Jun Xue
Published: January 2012

The paper is concerned with the effect of cutting parameters on surface microhardness in the high speed milling of titanium alloy TC17 with carbide cutting tools by single factor experiment. To provide experimental evidence for process parameter optimization and surface quality control in high-speed cutting titanium alloy parts. The results show that to aim for lower hardening layer depth, cutting parameters can be optimized as: vc=391.7m/min, fz=0.05mm/z, ap=0.45mm. The effect of cutting parameters on microhardness has experienced surface hardening-softening - re-strengthening - the process of stabilizing，in the experimental range.
Research on Fuzzy PID Adaptive Control for Steam Generator Water Level
Authors: Peng Wei , Zhang Da Fa
Published: January 2012

In order to overcome shortcomings of the traditional PID control for nuclear steam generator water level, we proposed a fuzzy PID control system by using fuzzy reasoning. By summing up the experience of skilled operators, we gave a set of fuzzy control rules, and determined some important control parameters. To verify the effectiveness of fuzzy PID control, a simulation for a steam generator in Qinshan nuclear power plant, for example, was given. Simulation results show that the method can effectively improve the control quality.
Dynamic Simulation and Control Research for Special Shipborne Crane Based on ADAMS
Authors: Li Peng , Zhu Fang , An Xu Feng
Published: January 2012

The special crane used by ship in this paper is a multi-joints and folding robot arm’s work system. Because it needs to work in a variety of sea conditions and being affected by waves and so on, the high demands of the trajectory control should be required. For this kind of complex control system, a system which is analyzed and simulated by the combination of ADAMS (Automatic Dynamic Analysis of Mechanical Systems) modeling based on a virtual prototype and MATLAB control is built and designed. The composition and implementation of the system are presented in the paper. The fuzzy cerebella model articulation controller (FCMAC) was used to tracking control and dynamic simulation research was done for this system. The results showed the superiority of this method which made kinematics and dynamics modeling analysis on ship-borne special crane based on the ADAMS. The simulation results of controller showed FCMAC had good tracking effect. The research method has intuitive, efficient and convenient features, provide better thought for similar studies of complex mechanical system.
Concrete Compressive Strength Prediction Using Rebound Method with Artificial Neural Network
Authors: Liu Jian Ming , Li Hui Jian , He Chang Jun
Published: January 2012

Concrete is a mixture of the cementing material, aggregate and water in a certain proportion and is the most main materials of the civil engineering materials. It is difficult to make modeling for a highly complex material. The concrete rebound value with wide randomness is a dependent variable, while the compressive strength value with narrow randomness is an independent variable. This paper aimed to show possible applicability of artificial neural networks (ANN) to predict the compressive strength. Back propagation neural networks (BPNN) model is constructed trained and tested using the available test data of 108 different concrete specimens. The data of input parameters used in BPNN model were covered the ratio of water to cement, fine aggregate ratio, coarse aggregates, mean value of test area of rebound method measurement. The mean absolute percentage error was less then 10.19% for compressive strength. The results showed that ANNs was good at as a feasible tool for predicting compressive strength.
Abnormality Detection Methods for Airborne Equipment’s Working Performance Based on χ2 Distribution Model
Authors: Lü Yong Le
Published: January 2012

In the research of Prognostics and Health Manage-ment aiming at the airborne equipments such as aeroengines, the working state of equipments can be efficiently monitored based on the flight data acquired, recorded and transported to the ground database by the Aircraft Condition Monitoring System.Firstly, the conception of normal working performance model and the Polynomial Coefficient Auto-Regressive model are introduced in the paper to help identify the abnormality of equipments. Secondly, based on chi-square distribution model, the abnormality detection algorithm based on chi-square test of standardized error sum of squares and the abnormality detection algorithm based on chi-square test of distribution fitting are put forward to detect the equipments’ latent damage or fault. Compared to the former, the later can effectively reduce the rate of false alarm, however response unpunctually to the equipment’s abnormality. Finally, the validity of algorithms is confirmed by the results of simulations aiming at a low pressure compressor rotor vibration amplitude sequence. It is indicated that the algorithms will be good tools for condition-based maintenance and autonomic logistics in future.
Design of Image System Based on Textile Application
Authors: Zhang Hong Hua
Published: January 2012

This paper gives out a design of system which can be used to design the pattern on textile fabrics. It goes without saying that innovation is playing a vital role in the design and more responsible for the popularity of products in the market, especially in the pattern CAD/CAM domain. So more and more researches have focused on how to design and manufacture patterns better. Intensifying the function of innovative pattern design has become the urgent requirement of the new generation of printing pattern CAD/CAM.This system applied advanced technology of image processing. At the same time, in order to meet the need of the fast design of the spinning industry, it took advantage of the simple menu that can realize the processing function of images and files. With a little manual operation, it can realize the design of spin and weave pattern easily. And the picture can be kept the file that spin and weave machine can identify. This paper primarily studied and introduced the BMP picture’s load and read and the arithmetic of the meshing and the disposal of the picture. Finally this thesis introduced the theories of the frame of design and the fill of the picture and the realization of some assistant tools.
Superheater Steam Temperature Control Based on the Expanded-Structure Neural Network Inverse Models
Authors: Ma Liang Yu , Shi Zhen Xing , Lee Kwang Y.
Published: January 2012

In order to improve the control effect of the Superheater Steam Temperature (SST) for a 300MW boiler unit, this paper presents an inverse compensation control scheme based on the expanded-structure neural network inverse models. The input and output variables of the expanded–structure neural network Inverse Dynamic Process Models （IDPMs） for the superheater system are determined from understanding of the boiler operating characteristics. Then, two neural network (NN) inverse controllers are designed with the IDPMs as on-line output compensators for the original cascade PID controllers in order to improve the control effect. Detailed simulation tests are carried out on the full-scope simulator of the given 300MW power unit. It is shown by tests that the control effects of the NN-compensated control on the SST are significantly improved compared with the case of the original cascade PID control scheme.
Technology for EDFA Gain Flattening Based on Long Period Fiber Grating
Authors: Liu Kai Xian
Published: January 2012

EDFA is an important component in WDM optical communication systems. But the uneven characteristic will lead to reduced effective transmission bandwidth and system performance degradation. This paper studies on issues of EDFA gain flattering based on long period fiber grating, and provides detailed analysis of the method of using LPFG to achieve flat EDFA output gain. Numerical simulation result shows that this method can reduce unevenness to 0.2dB and below.
DNA Computing Model Based on Self-Assembled Nanoparticle Probes for SAT Problem
Authors: Li Fei , Xu Jin , Li Zheng
Published: January 2012

. SAT problem is one of important NP-complete problems with widespread application. In this paper, a new DNA computing model based on self-assembled nanoparticle probes is presented to solve this problem. Its essence is that all possible combinations of variables for given problem are encoded in the recognition zone of self-assembled nanoparticle probes. Major benefits of this method include vast parallelism, extraordinary information density and easy controllable operation. The result reveals the potential of DNA computation based on nanotechnology in solving complex problem.
General Modularized Design (GMD) for the Agile Design of Crane Drum
Authors: Cao Xu Yang , Liu Xue Xia , Pan Zhi Yi
Published: January 2012

In order to improve the design efficiency of the crane and its parts to meet the fierce market competition, we developed rapid design system for crane drum. According to GMD theory, this paper takes crane drum for study, and divides it into several modules to form series and modular of crane drum. Summarized the design theory and knowledge of the crane drum and determined the parameters of functional modules. We shift modules from static modules to dynamic modules. By making a second development of Solid Edge with Visual Basic.NET, we developed agile design system for crane drum. After numerous tests in the actual design process, the system can greatly improved the quality and efficiency of design.
Design and Modeling of Cutting Paper Tape Machine for Sole Coating
Authors: Sun Chuan Zhu , Hao Chao Hui
Published: January 2012

For the family embarrassment and annoyance brought by the replacement of slippers when someone pays a visit, a cutting paper tape machine for sole coating was designed. Based on the detailed calculation and preliminary drafted general design scheme, the electric motor was chosen, the transmission ratio was distributed reasonably, the structural style and related parameters of worm gear were designed, and the stress strength was checked. Based on these, the three-dimensional model was established, through simply simulation, the scheme was verified and improved, and the parametric design was realized. Thus, one kind of convenient and practical cutting paper tape machine for sole coating is provided for families and high-grade places, which is greatly convenient to visitors.
Formation and Control of Cutting Direction Burr in Machining
Authors: Wang Gui Cheng , Li Qin Feng , Pei Hong Jie , Qu Hai Jun , Zhu Yun Ming
Published: January 2012

In this paper, the forming processes, main effect factors and change law of the cutting direction burr in orthogonal cutting have been studied and related theories are analyzed based on the cutting experiments. The result shows that the forming processes of cutting direction burr consist of normal cutting, flexure deformation of end surface of workpiece, plastic effect, continuous cutting and shear-break separating in orthogonal cutting. And a new phenomenon was found that cutting direction burr is formed with the shear-break separation of the chip and workpiece machined surfaces. In addition, the size of cutting-direction burr varies with workpiece materials, cutting parameters and geometric parameters of cutting tool. The study may be important science and practical value in order to control and reduce cutting burr in precision machining.
Rescheduling of Parallel Machines under Machine Failures
Authors: ShangGuan Chun Xia , Li Jun Tao , Shi Rui Feng
Published: January 2012

In this study, we address a rescheduling problem in parallel machine environments under machines failures. To make a balance between efficiency and stability of the reschedules, we consider the total number of tardy jobs as efficiency measure and the number of jobs processed on different machines in the initial and revised schedules as a stability measure. Then a heuristic algorithm which synthesizes beam search (BS) and repair-based constraint satisfaction algorithm is developed. Numerical experiments are processed to evaluate the performance and efficiency of the proposed algorithm. The experimental results show that the proposed algorithm improves the results significantly.
Online Weld Quality Benchmarking and Assurance during the Mass-Production Resistance Spot Welding Process
Authors: Gong Liang , Liu Cheng Liang , Li Yan Ming , Li Bing Chu
Published: January 2012

Nowadays online quality estimation for the resistance spot welding (RSW) has benefited a lot from monitoring the electrode displacement caused by nugget thermal expansion. Based on these emerging monitoring techniques a new approach is proposed to classify the weld quality and assure the quality for mass-produced weld group, which enables the continuous quality improvement concept during the welding process. A causal models are built with the offline trained Bayesian Belief Networks (BBN). It is a weld quality assessment net reveals the dependency of the weld quality on the features displayed by the displacement curve, which can be used for overdesigning the safety welds or as the probabilistic forecasting model for online weld quality assessment. The experimental results show that the proposed approach is valid and feasible to predict the weld quality and assure the overall quality for weld group in real applications.
Future Research Vessels
Authors: Alkinson Larry P.
Published: December 2011

The academic research vessel fleet in the United States is embarking on a great experiment. By 2004 we will know if SWATH vessels such as the Kilo Moana and the possible built Woods Hole Oceanographic Institution coastal SWATH have such great advantages that all future vessels
will be of SWATH design. Or, we will find that the two hull forms have distinct niches and the fleet will evolve with a strategic mix. Regardless of the future hull form research vessels will grow in size to accommodate advanced technology and the people to run and maintain it. The research
vessel will become an office and laboratory at sea with seamless communication to the shore for the oceanographer.
Sustained Ocean Observations from Merchant Marine Vessels
Authors: Rossby Tom
Published: December 2011

Merchant marine vessels have provided invaluable information about weather and climate over the seas. In this note, it is shown how these vessels also contribute to ocean research through systematic surveys of upper ocean temperature, salinity and currents. By repeatedly sampling a
particular route, one can obtain an accurate picture of the mean state of the ocean and where and how it varies. With a few examples drawn from our own work we show how commercial shipping and cruise vessels, with their unparalleled access to the oceans, could give society far more extensive
and valuable information about upper ocean and atmospheric conditions on a regular basis. But for this to happen, a new generation of ocean instrumentation needs to be developed that is optimized for completely automatic and unattended operation on such vessels. It also means working with
the merchant marine community to develop guidelines and procedures for future cooperative efforts.
United States Arctic Research Vessels
Authors: Berkson Jonathan M. , DuPree George W.
Published: December 2011

Recent concerns with pollution and climate change in the Arctic have led to new monitoring and research programs that require the support of arctic research vessels. This paper reviews the status of U.S. surface and submersible research platforms with a focus on surface ships. During
the Science Ice Expedition (SCICEX) program in the 1990s, U.S. Navy submarines were successfully used as research vessels and extensive oceanographic data were collected during under-ice transits. With the decommissioning of the Sturgeon-class submarines, future under-ice research cruises
are uncertain and will depend on the availability of other ice-capable submarines or the development of high-endurance automous underwater vehicles. For scientific work on surface research vessels the U.S. has two multi-mission polar icebreakers and a new icebreaking research vessel. In addition,
University of Alaska has begun concept designs for replacing the R/V Alpha Helix with an intermediatesized, ice-strengthened ship for oceanographic and fisheries research around the coast of Alaska. Two multi-mission Polar-class Coast Guard cutters, USCGC Polar Star and USCGC
Polar Sea, are equipped to serve as oceanographic research vessels and have made important contributions to both Arctic and Antarctic science programs during the last twenty-five years. USCGC Healy, which was designed from the keel up as a research vessel and heavy icebreaker, is
capable of supporting large multi-disciplinary studies. The ship, which will be operated as a dedicated Arctic research vessel, was delivered in November 1999, completed ice and science trials in July 2000, and conducted its first dedicated science cruise in the Eastern Arctic in the summer
of 2001. The advent of Healy adds significantly to the U.S. science-support capability in the Arctic.