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- Keywords：supercritical CO 2 extraction,wheat embryo oil,extraction pressure,extraction temperature,quantity of cycling CO 20|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The modal parameters' identification by global orthogonal polynomial method proposed by Richardson, has been accepted widely. Nevertheless, it isn't the least variance estimation, the algorithm is very complicated, and the computation work is rather heavy. The improved method can reduce the estimation variance by including an extra error weighting function (EEWF), and the computation amount will be reduced with the base functions of denominator and numerator being chosen as identical series of orthogonal polynomials. The estimation results of the example without noise showed the validity of the new algorithm. For the example with noise, it is shown that the introducing of EEWF can improve the estimation precision efficiently, which can be obtained by iteration, and if the imaginary part absolute of the driving point compliance is adopted as the initial value of EEWF, the iteration times can be decreased down.Keywords：vibration,identification of modal parameters,polynomial,rational polynomial,curve fitting,parameter estimation,variance0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Squeeze flow between two disks is a classical mechanics model. Wall slip will affect the magnitude of squeeze viscous force. Based on the Reynolds' lubrication theory, squeeze flow between two parallel plates of a Bingham fluid with partial wall slip was considered. The results showed that the squeeze viscous force decreases with the slip parameter increases, the rigid region of the fluid increases with the slip parameter increases. When the slip parameter tends to infinit, the results of squeeze viscous force will be reduced to the case of the squeeze flow of rigid-plastic solid between two parallel disks.Keywords：squeeze flow,Bingham fluid,slip,lubrication theory0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The initiation and propagation of stress cracks of rice kernel were studied by the fractal theory. The stress cracks of rice kernel were observed by Scanning Electronic Microscope. The stress cracks of rice kernel possessed a fractal character. Four types of propagating models of stress cracks were established. The propagating kinetics of stress cracks was studied.Keywords：fractal theory,stress cracks,rough rice,drying0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Based on the study of the dielectric property of seeds, the factors affected on the dielectric property of seeds and the relationship between the dielectric constant and seed vigor were analyzed. Meanwhile, using the test rig of dielectric separation, the wheat seed were graded into 5 classes, and the indices such as kilo-grain weight, dielectric constant and vigor were measured. The result showed that the dielectric constant of higher vigor seed is smaller and the dielectric constant of lower vigor seed is greater, which verifies the theory that the dielectric separator separates seeds by means of the differences of grain weight and dielectric constant (vigor).Keywords：seed,dielectric constant,vigor,dielectric separation0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Fully considering the crop field condition, based on logic IC, a four rows monitoring device for corn precision seeders was developed, with sound and light alarm when absence or jam occurred. The study is not only including the circuit functions such as logic of alarm, time setting, rows selection, but also involving the connection ways between sensors and the main monitor, the setting structure of the sensors on the seeding tube, the waterproof and anti-dust of the sensors, and the method of power supply. This device was validated by field test. The functions are all credible.Keywords：precision seeder,seeding monitoring,sensor0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Effects of lactobacillus and cellulase on quality of corn stover silage were studied by the experimentation of ferment which was designed and controled in groups of lactobacillus, cellulase, lactobacillus and cellulase. Results showed that the treatment of corn stover silage with cellulase was reduced the ratio of m(VBN)/m(TN) to 28%, ADF 20% and butyric acid-to-total acid 100% as compared with the controled silage. This silage quality turned out to be better as compared with controled silage. Lactobacillus treatment can increase concentrations of NDF, m(VBN)/m(TN) although this silage had good color, odor and texture. Treatment of corn stover silage with cellulase and lactobacillus improved DM digestibility 8%, decreased m(VBN)/m(TN) 33% and lower butyric acid-to-total acid ratios 82%, NDF content 10%, ADF content 7%. The results showed that their quality could be improved obviously.Keywords：silage,lactobacillus,cellulase,corn stover6|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The characteristic wear tests of abrasive wear were carried out on the M-200 tester, and the wear surface images were photographed by using the Pen-MS wear video monitoring system. The analysis on characteristic wear images was conducted through computer digital image processing technology as follows in turn: the medium value wave filtering method removing noisy to strengthen wear images, the reiterative method computing segmentation threshold to obtain double-value images, the Kirsch-factor model plate matching method to detect the edge of wear image, the model recognition method to extract characteristic shape contour of images, the coding method to measure the area of characteristic region. The video description of characteristic wear processes and the quantifying analysis of characteristic wear damage mechanisms were realized.Keywords：mechanical wear,video monitoring,images analysis11|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Data models and standards for distribution automation databases are needed urgently by distribution automation projects in China. By analyzing features of power distribution operation and management, data flow graphs of operation data, maintenance and patrol data, and assets and topological data for power service utilities were proposed. These three data flow graphs can be used to describe the whole procedures of data generation, data procession and data transfers in power distribution services. Based on these graphs Entity-Relationship models and their relational modules for distribution automation database were developed.Keywords：power distribution,data models,data flow graphs,ER models1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Based on three different load operation conditions - light, normal and heavy, the proposed solution methodology can be used to decompose the problem of distribution reactive power planning into a investment planning problem and a operating planning problem. The mathematical model of optimal reactive power planning on rural power distribution network has been established. Genetic algorithm was applied to solve the 69 node system and practical system, the result is better than linear programming.Keywords：rural power distribution network,reactive power optimization,genetic algorithm,1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：To utilize the data accumulated by universities about pedagogic management effectively, the BGD(Beijing Graduation Database, BGD from 1996 to 2001) was researched by using DM(Data Mining) method. After thorough analysis of BGD,BGD was preprocessesd by many methods to standardize this method and it is made fit for knowledge discovery. In the pro-management progress, FAP method was put forward and adopted, which is used to construct attributes. Association Rules was researched and Apriori algorithm was improved. Association Rule was designed and realized according to practical requirement on the base of improved Apriori algorithm. It is used to mine BGD and some results which is helpful to decision making of universities.Keywords：Data Mining,Beijing Graduation Database,association rule,apriori algorithm,0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Aiming at the disadvantages of traditional network topology discovery algorithms, a new approach - RANTAD was presented. Based on TCP/IP network management architecture, RANTAD algorithm integrates multi networks protocols with exiting discovery techniques. In the actual discovery process, RANTAD algorithm can adopt with protocols and techniques adaptively according to the network situations. The algorithm was implemented with Microsoft Visual C++. The experiment showed that RANTAD algorithm can discover network topology information more efficiently and adaptively than traditional algorithms.Keywords：network management,topology discovery,SNMP0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：Asp. niger,phytase,submerged-fermentation,kinetics model1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：predictive modeling,Enterococcus faecium,tofu,growth model4|5|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：liquid cover film,frame material,filling material,digestant,discolor1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：cornpowder,carbonxymethyl starch,viscosity Etherification,reaction0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Large eccentricity of foundation of the long span building with arch roof makes the bottom area of foundation so large that it cannot be unrestricted adopted in practice. This paper analyzed the characteristic of those structures with this type roof, aim at the fact of engineering in China, provides several methods to improved foundation. 1) Increasing deadweight of foundation, the foundation beam under the wall will transfer the weight of the wall to the foundation; 2) Using composite foundation, construct the foundations of wall and column as a whole, the foundations of the wall endures part of the moment and shear force from the colum; 3) If the building endures little wind load and has no crane, eccentric foundation can be used, a proper reverse moment is given to the foundation. It was testified by engineering case that the composite foundation has smaller bottom and less volume than those foundation designed by general method. The improved foundation can save about 30% concrete. The cost was reduced and the construction will be convenient.Keywords：arch roof,foundation,eccentricity0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The situation of application and the impacts of agrochemicals on environments and human health are introduced. The topics, such as how to rightly develop the agrochemicals, and make full use of them in agricultural production, human health and food safety, as well as how to avoid the environment pollution were discussed in detail. Some viewpoints and suggestions were presented.Keywords：agrochemicals,entironment,human health,strategies2|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：Product market witnesses increasing changes of consumer demand. Therefore market managers have to consider these changes in the first place as optimizing their products line, which have become an important part of product decision making. An optimal product line selection model which is based on discrete choice data was modified. The application of the modified model was showed by a candy case to locate the most profitable product for each segmented market. The example proved its practicability and showed its applicability in market subdividing, product line optimizing and competition countermeasures developing respectively.Keywords：discrete choice model,product line,optimization3|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The Enterprise Capital operation in China is still in the immature period. The study on Enterprise Capital operation resultant aims to coordinate and control the capital operation pointedly. Applying piecewise function, the model of Enterprise management performance was buied. Considering dynamic quality of Enterprise Capital operation, the method called'Enterprise Operation Resultant Appraisement Model' was put forward, based on comparison to Enterprise management performance during two different period. Seven financial quantitative indexes including ROE, Return Rate of of total assets, Turnover rate of total assets, Turnover rate of the current assets, Asset-liability ratio, Liquidity ratio and increasing rate of sell were chosen. Four qualitative indexes including realizing degree of Enterprise's management strategy, the merging degree of Enterprise culture, coordination degree of production and management and combining result of goal enterprises were selected. By applying for this model, the capital operation appraisement of a real-estate enterprise was carriedout.Keywords：capital operation,resultant appraisement,appraisement model1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The mechanism of behavior selection of company and pig farm in high quality pork supply chain was analyzed, and the critical condition of behavior selection of them was obtained by using supervise game model. From the fields of risk mortgage, cheap purchasing, deferred purchasing, and grim strategy, the effects of punishment on the behavior selection of pig farm were studied. It was showed that breeding scale and the price difference of pork were the key factors effecting on the behavior selection. Facing high earning rational consumer, and creating pork supply chain by large pork processing enterprise, and actualizing market collection strategy based on the production difference will be the important approach to improve the behavior of pig farm.Keywords：high quality pork,risk behavior,supervise behavior,supervise game0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
