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- Abstract：On the basis of the calculation and analysis of Symmetric Scale Comparative Advantage Index, Symmetric Efficient Comparative Advantage Index and Symmetric Comprehensive Comparative Advantage Index of vegetable production in China, following conclusions are drew: first, great differences exist among different areas in China; second, areas have vegetable producing advantages are those have good marketing conditions; and third, vegetable production in China has began to abide by rules of comparative advantage. At last, suggestions for vegetable production to make good use of area advantages are put forward as follows: first, vegetable production should follow the path of scale producing; second, it is important to set up centralized vegetable market system in order to ensure vegetables' circulating in high efficiency; third, industry polices for advantages complementing between areas should be adjusted by government; and last, every area should coordinate the relation between vegetable producing and area agricultural comparative advantages.Keywords：Symmetric Scale Comparative Advantage Index,Symmetric Efficient Comparative Advantage Index,Symmetric Comprehensive Comparative Advantage Index1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The technical condition and status of sustainable development and informatization in twon were analysed, the concept of informatization twon and the applicable technique were explained, the index system for evaluating and application of geographic information system were discussed, the basic structure for information town development was pointed out. Urbanization and information have been entered into the period of high speed development of China. The mangement, particularly for the governmento informatization will play a decisive role in the informatization town development.Keywords：town,informatization,GIS,index system,government management1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：A quasi Shannon wavelet collocation method for two point boundary value problems was constructed. The quasi wavelet based numerical method was used to discrete the spatial deriatives. The extrapolation method for quasi Shannon wavelet collocation solution was provided. The same strategy can be taken between Shannon wavelet collocation method and extrapolation method in choosing mesh spacing, it is easy to improve computational accuracy by combining these two methods. The numerical solution of examples showed that quasi Shannon wavelet collocation method is successful in computing of the problems possessed heavy gradient solutions, and the extrapolation method is helpful to improve the precision of the collocation solutions.Keywords：quasi Shannon wavelet,collocation solution,extrapolation methods0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：In order to evaluate the normal viscous force between two rigid spheres in squeeze flow of a power law fluid efficiently so as to implement into simulation using the Distinct Element Method, a fitting scheme with a factorization technique and series expansion was developed instead of numerical integration based on the integration form of formulation for the force in our accompanied paper. Comparing with the accurate results by a numerical integration, the approximate results by the proposed scheme, an excellent agreement was shown but the proposed scheme can greatly reduce the CPU time.Keywords：the discrete element method,power law fluid,squeeze flow,viscous force,fitting2|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：Flos Lonicerae,Chlorogenic Acid,extraction purification0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The best parameters of technology was determined through orthogonal test, then using method of boiling water to obtain polysaccharide of indigowoad root, and content was determinated with phenol vitriolic colorimetry. The extracting rate of unrefined polysaccharide of indigowoad root by using microwave treatment was up to 33 062 % , and the content of polysaccharide was up to 75 211 % , better than using boiling water extraction alone. The polysaccharide of indigowoad root has been obtained for the first time by microwave technique, both extracting rate and content are apparently high.Keywords：microwave technique,indigowoad root Polysaccharide,extraction,determination0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：cow manure,ice straw,composting,factors,composting temperature,oxygen consumption rate7|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：spray drying,gas particle flow,model,CFD0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Spinning disk may achieve a good droplet distribution with low volume spray method. Since its special spray pattern, the droplets atomized by a spinning disk have high potential to drift than that produced by hydraulic nozzles. By analyzing the initial velocity of a droplet and the spray pattern of a disk, its characteristics on droplet distribution and drift ability were estimated. Comparison tests between spinning disk and standard fan nozzles were conducted for the evaluation of the drift potential of spinning disks. The study results showed that spinning disks were not suitable for target spray whem they were mounted on a boom, but might performed well on an over all spray with low or ultra low volume spray, which would benefit arid and semi arid areas.Keywords：spinning disk,spray pattern,drift0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：SiC W laminated composites,fracture toughness,principle9|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：A calculating method for finding the induced geodesic torsion was developed by using differential geometry and other mathematics tools. During the development, the concepts of principal curvature and principal direction were used by which the calculation could be simplified.Keywords：geodesic torsion,induced geodesic torsion,theory of gears engaging,1|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The industrialized agriculture in China has been made a rapid progress in recent years. However, the automation level is still relatively low. So the introduction of computer vision technique into the field of industrialized agriculture has great significance in promoting the intelligent control level in greenhouse. A review of recent development of computer vision in this field was taken and its main focus is on two sides: using image processing technique to monitor the plant growth and develop agriculture robot. The research directions of the computer vision technique in the future are predicted in aspects of the development of the image processing hardware, the application of neural network technique and the new method of image processing.Keywords：computer vision,image processing,industrialized agriculture,growth monitoring,robot7|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The design and realization of a storage management information system was developed and the software flat application of multi regional information management system was solved. The system, based on Browsers/Server 3 tier technique structure, constructed the company plat utilizing WEB server, Application server, Oracle database and JDBC. Furthermore, the dynamical publication and exchange of information in the Internet was realized using JSP and JavaScript and played a significant role in the development of company.Keywords：Storage management,B/S,JDBC,JavaBean,Oracle,2|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Two new methods were presented to process image edge, both detection measurement of gray on border upon area and detection measurement of template. When the fruit image was detected using these two new methods, the edge detection was very well. The image edge obtained by these methods is very clear, successive and regular. The farther processing was not needed. The image area detected in these methods was half of that in traditional method. So the speed was very fast in the processing.Keywords：edge detection,computer uision,indefinite image3|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The effectiveness and actualities of mechanical system virtual prototyping software were summarized. The process from prototype to utility, commercialization and industrialization was analyzed in software engineering. The basic concept of practical improvement for a mechanical system virtual prototyping software was presented. The key points of the mathematical model, topology structure, constraint type, kinematic and dynamic simulation and data exchange were discussed by the theory of multibody system dynamics and the technique of object oriented.Keywords：mechanical system,virtual prototyping,kinematics,dynamics,simulation0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：hawthorn vinegar,fruit vinegar,bottom fermentation,alcohol fermentation,vinegar fermentation2|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Cost is an important factor must being calculated in design of greenhouse structure. Reducing the quantity of steel used in structure is the most efficient way to cut down the cost of greenhouse. The principle of full stress optimization design was introduced. Based on mechanical analysis, the mathematical model of greenhouse structural optimization design was built. Full stress optimization was applied to multi span greenhouse design. As the aid of greenhouse design, software of optimization was developed. The software was tested in typical case and used to multi spans greenhouse.Keywords：full stress,greenhouse frame,optimum design0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：R.C. long columns are widely used in engineering structures. Due to the large deflection, a full range analysis of R.C.long columns under eccentric load is complicate and difficult. A non linear finite element model was developed for the full range analysis of R.C. long columns. In this model, the non linear behavior of materials and the non linearity of geometry were considered. A non linear analysis computer program was developed for this model, and some practical analysis was made and the results were compared with the test data. The eccentricity amplification factor was analysed in detail. All analysis results showed that the nonlinear F.E.M.model developed in this paper is applicable with sufficient accuracy for practical use.Keywords：reinforced concrete,long column,nonlinear,finite element method0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To overcome the limitation of frequencey responding analysis method, an eight freedom model of vehicle ride dynamic was developed. The model involves the vehicle vibration in vertical, pitching and longitudinal. Computer simulation in time domain of the vehicle ride on B grade road that use the Matlab/Simulink was carried out. The research result showed that this method can be used to evaluate and predict the ride comfort of vehicle running on the random road, it is helpful to design and control the vehicle suspension system.Keywords：vehicle ride dynamics,ride comfort,simulation in time domain,suspension system2|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：A brief review of detecting and evaluating technique of motor driver fatigue is provided. According to the comparison between several commonly used detecting and evaluating techniques of motor driver fatigue, the P80 of PERCLOS (the proportion of time the eyes were closed at least 80 percent) is most significantly correlated with driver fatigue. A convincing case has been made that slow eyelid droop PERCLOS has the best potential to detect fatigue. A feasible method based on the mathematical model and symmetry analysis is presented to detect and locate the driver's eye in an image and the gray scale mode matching technique is used to determine the driver fatigue degree. An example for detecting the eyelid closure over the pupil over time is given. The combinations of mathematical model and symmetry analysis increases the robustness of the performance while the target is deformed. The scheme is suitable for human face location in intelligent human machine interface and provides a groundwork to practical application of face recognition techniques. The PERCLOS based recognition algorithms will be considered as a most effective method used to accomplish real time measure of alertness for in vehicle, drowsiness detection systems.Keywords：PERCLOS,driver fatigue,image recognition,gray scale mode matching,detecting and evaluating algorithms,1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
