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- Abstract：To explore new prediction methods of macro agricultural production system, one method of modeling the prediction of agricultural production based on BP (back propagation) model is established. Fitness analysis of foodstuff production was made and the total production of 461.2546 million ton in 2004 was forecasted using all the data of meteorology, economy, production, inputs, technology and prices. Compared with gray system method, the model has over 90% of precise fitness,tolerance on errors, association and studying capacity. This model can be applied to solve issue of prediction of agricultural production system.Keywords：artificial neural network,back propagation model,agricultural production system,forecast0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：cellulose degradation bacteria,composite microbial system,cultural condition,cellulose degradation0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：In order to study effect of the mulching on improving rainfall use efficiency, simulation was conducted using the artificial rainfall of sprinkle, moderate rain and downfall were simulated. The 0-20cm layer soil water content distribution was compared within 3 treatments, corn mulch cover, wheat mulch cover and no residue cover. The result shows that water content with mulch cover in 0-5cm layer is temporarily lower than that with no residue cover ones after sprinkle because of mulch cover blocking rainfall infiltration. But the soil water content with corn mulch cover is almost the same as no residue cover' after 24 hours, then higher than no residue cover' later. The water evaporation with no residue cover is higher than with mulch cover. After moderate rain, blocking effect of mulch cover on leaching is mainly happened in 5-20cm layer, but chiefly in 10-20cm layer after downfall. The water holding capacity of mulch cover's blocked rainfall infiltration temporarily. However, because of low evaporation, rainfall infiltration effect of mulch cover on water infiltration are higher than that of no residue. Even under the small amount rainfall mulch cover still benefits the rainwater use.Keywords：mulch cover,rainfall infiltration,moisture evaporation1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The vascular bundle in peduncle of rice is the important channel of the transportation of photosynthetic products for panicle. In this study, a recombination inbred lines population, derived from the cross between the two Japonica-like cultivars: Guangsan and C418, was used to construct SSR marker linkage map and to map the quantitative trait loci(QTL) controlling number of vascular bundles in peduncle, yield and yield components. Four QTLs for the number of large vascular bundles in peduncle were detected on chromosomes 1, 5, 8 and 11,respectively. Three QTLs for the number of small vascular bundles in peduncle were mapped on chromosomes 5, 9 and 10,respectively. A total of thirty QTLs belong to eight traits of yield components were detected. Through the analysis of linkage relationship among QTLs controlling vascular bundles in peduncle, primary and secondary rachis branches and grains per panicle, it was suggested that the increase of number of large and small vascular bundles in peduncle might keep the affluent flow as well as enhance the capacity of yield sink of rice.Keywords：rice,vascular bundle,yield trait,QTL1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：Diospyros kaki,fresh-keeping wrap,shelf-life,water-keeping,de-astringenc2|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：mouse,hatched blastocyst,straw,open pulled straw,vitrification3|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The suitable water content of Alfalfa silage and the effect of FGJ and silage inoculant bacteria-MMD3 on the fermentation of Alfalfa silage are studied under laboratory condition at 72.72%, 47.30% and 28.48% water content of Alfalfa silage. Results show that: 1) the effect of Alfalfa silage fermentation is the best at 47.30% water content. 2) addition of FGJ and silage inoculant bacteria-MMD3 can improve the level of silage nutrition, and the silage effect of silage inoculant bacteria-MMD3 is better than FGJ. 3) the silage effect of addition FGJ and silage inoculant bacteria-MMD3 is obvious at 72.72% and 47.30% water content, but is not so at 28.48%. 4) The Acetic acid content of silage inoculant bacteria-MMD3 is higher than the control.Keywords：fermented green juice (FGJ),silage inoculants bacteria,Alfalfa,silage,water content5|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：whole-plant corn,silage,lactobacillus,cellulase,microorganism,fermentation characteristics1|2|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：Property of impedances of unfrozen and frozen-thawed crucian carp was measured under different frequencies. Although impedances of both unfrozen and frozen-thawed crucian carp decreased as frequencies increased, change value of impedance of unfrozen crucial carp was evidently more than that of frozen-thawed ones. Therefore, it is feasible to differentiate unfrozen and frozen-thawed crucian carp using change value of their impedances.Keywords：unfrozen crucian carp,frozen-thawed crucian carp,frequency,change ratio of impedances1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：In order to solve the problems of which the spiral bevel gear of Oerlikon type is necessary to cut and modify repeatedly, a new method was developed to predict the contact pattern and greatly reduce the cost for manufacturing by means of building a tooth contact analysis model of prolate epicycloids bevel and hypoid gears for Oerlikon SKM2. Running through the developed calculation software package, the diagram output by computer softwares closely coincides with the contact pattern observed on a testing machine. The package is not only used for computer aided analysis tooth contact pattern, but also for analyzing the moving rule of tooth contact pattern.Keywords：prolate epicycloid,bevel and hypoid gesrs,contact pattern,computer aided analysis0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：In order to simulate the behavior of the U-tube ground heat exchanger (GHE) used in ground source heat pump (GSHP), a pseudo 3D model was developed which was based on coupling two less dimensional models. A heat exchange power function was introduced as the boundary condition for the inlet of the U-tube. The distance between the heat source and the center of the field was simplified by calculating a mean distance between them. Finite-volume-method was used to solve the control equations. The maximum and mean relative error between numerical and experimental results were only 3.48% and 1.33% respectively. According to the numerical results, with a 40m depth borehole the specific value between inlet and outlet temperature is 1.34; with 80m and 120m depth this value were 1.90 and 2.77 separately, and the difference temperature caused by the outlet tube is minor. This came the conclusion that extra borehole depth aggravates heat short circut between the 2 legs of the U-tube.Keywords：ground source heat pump,ground heat exchanger,numerical simulation,heat transfer model1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：Dynamic reactive power optimization model is established in this study. A new approach utilizing genetic algorithm to auto-separate load curve in segments is proposed. Genetic algorithm has been used to complete the reactive power optimization. It is studied how to build appropriate VQC limits according to the calculation of reactive power optimization. When deciding VQ limits of VQC, the forecasting load of every period of time is defined as a fuzzy number, which turned exact one by a certain believe level to calculate the range of reactive control. The software structure of the reactive power control system is designed in this paper. The reactive power optimization program has been validated in a district power system. The power loss dropped by 4.96% after optimization in a district power system.Keywords：power system,reactive power optimization,genetic algorithm,short-term load forecasting1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：According to the grafting robot's characteristic of multi tasks, the control system adopts to double CPU in order to increase the working rate. It is divided into two parts: one for detecting and another for grafting, which are controlled by two CPU respectively, and each CPU has their own different duties. The detecting CPU is mainly in charge of getting the root stock, identifying the leave' direction and growing point's height. The grafting CPU's tasks are to realize giving, cutting, grafting and sending out. In order to complete the grafting process, information is transmitted by I/O ports between two CPU to make them harmonize with each other. The control system realizes that several operations are done at the same time. Therefore, the working rate and reliability are increased greatly. So the automatic grafting robot has the high practicality.Keywords：nutritional bowl grafting,double CPU,parallel operation,control system0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：noise,mathematics morphology,median filter,denoise0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：porcine blood,immunoglobulin G,heat denaturation,thermodynamics2|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：silver carp,cathepsin,surimi gel softening,washing1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：wheel loader,cooperatively-manufactured -parts(CMP),reliability0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：circulation economy,materiel circulation,value proliferation,circulation economy pattern,agricultural industrialization0|6|0<HTML><L-PDF> <Meta-XML>Updated：2023-12-22
- Keywords：village and town constructive using Land,readjustment,potentiality of using land0|6|0<HTML><L-PDF> <Meta-XML>Updated：2023-12-22
- Abstract：The paper, with constant market share model, analyzed the composition of competition, commodity composing and market scale effect on agricultural export from Chinese Mainland to Taiwan during 1992 and 2002. The results showed that labor-intensive and some special products from Chinese Mainland, like Chinese traditional medicine, were favorable in the agricultural exportation to Chinese Taiwan. Competitive effect, the main reason for the remarkable increase in exportation to Chinese Taiwan, was the key factor controlling Chinese Mainland to obtain surplus between cross-straight agricultural trade. In contrast, commodity composition and market scale effect were negative factors. There was scarce exportation of the products which Chinese Taiwan much required, which might be the main reason for little commodity composing effect.Keywords：agricultural products,exportation competitiveness,constant market share model,Chinese Taiwan,0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
