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- Keywords：Penicillium documbens,lignin peroxidase,purification0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：tomato,uniconazole,seed soaking,seedling growth,physiological characters2|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
Influence of seed tray vibration on work performance of suction-vibration type precision seed device
Keywords：precision sowing,suction seeder,vibration,test analysis1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27- Abstract：A controller for precision seed metering device was developed. The controller includes a speed measuring instrument, auto control system, man machine interface and driving mechansim, it can input data, process data, and automatically control the speed of the seed sowing device. During seeding, the speed measuring instrument gets the speed of precision drill and the step motor is used to control the seed metering device. Thereby, decreases the effect of the wheel skid on the uniformity of seed metering. The system is simple and can directly input the diameter of the speed measuring instrument, the seed hole of seed sowing device and the amount of seed. By experiment, the system is reliable and can make the speed of the seed sowing device and the speed measuring instrument uniformity, and improves the uniformity of the amount of seed, and achieves the goal of design.Keywords：precision drill,controller,step motor,the speed measuring instrument,the seed sowing device2|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：agricultural machine,used plastic film collecting machine,collecting technological,main working mechanism4|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：thermoelectric cooling technology,nutrient solution,control,temperature2|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：solar greenhouse,tomato,NPK,light and temperature condition1|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The thick rotten disease of Ziziphus jujuba Mill. cv. Jinsixiaozao has been studied in the laboratory and field in many years. The study results are as follows: The thick rotten disease of Z. jujuba Mill. cv. Jinsixiaozao generally occurred in the production areas in Hebei province, Shandong province and Tianjin. It was most serious in Botou county, Hebei province. The thick rotten disease occur on the fruit in August 20, while the fruit become red and disciform thick rotten spot. The pathogens is Physalospora obtuse (Schw.), and the agamobium is Fusicoccum sp.Keywords：Ziziphus jujuba Mill. cv. Jinsixiaozao,thick rotten disease,identification of pathogen4|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：Chinese winter jujube,Zizyphus jujuba Mill,fermentation softening,ethanol,respiration,ethylene Production,1 MCP1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：cashmere goat,energy,body composition,cashmere production0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：This study was conducted to examine the effects of dietary fiber levels on dietary fibers and protein digestibility of emus fed on diets with different fiber levels of alfalfa meal. Digestibilities of Acid detergent fiber (ADF), Neutral detergent fiber (NDF) and Crude fiber (CF) were not influenced by the increasing dietary fiber levels when alfalfa meal contents on diet were 10 % or less and were decreased by further increasing of fiber contents on diet. The suitable maximums of the fiber contents on diet were ADF 7 8 % , NDF 16 7 % and CF 6 1 % . Dietary protein digestibility was the highest when alfalfa meal content was 5 % and it was significantly ( P <0 05) decreased by the increasing dietary fiber levels when alfalfa meal contents exceeded 5 % . Dietary protein digestibility was the highest when dietary fiber contents were ADF 7 4 % , DNF 16 4 % and CF 5 5 % . These results suggest that the dietary fiber levels influence dietary fibers and protein digestibility and the condign dietary fiber levels in emus' feed are ADF 7 4 % , DNF 16 4 % and CF 5 5 % .Keywords：dietary fiber,dietary protein,digestibility1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：Zafirlukast,endogenous leukotrienes,broiler chickens,pulmonary artery pressure0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：Beijing duck,retina,displaced amacrine cell,cell size,cell density0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：AA chickens were orally immunized with Eimeria tenella wild oocysts and its precocious oocysts twice. The oral infection and subsequent challenge with Eimeria oocysts effect on the populations of CD4 +?CD8 +T lymphocytes in the intestine, cecal tonsils and spleen of chickens, which was assessed by immunohistochemistry. Lymphocyte proliferation assay was used for the assessment of cellular responses. The results showed that after primary infection CD4 + cells increaseed immediately and significantly and reached peaked on 6th day, and the area positive of CD4 + cells of intestine and spleen was 38 % and 44 % in chickens immunized with wild oocysts, and was 36 % and 43 % in chickens immunized with precocious oocysts. Whereas nonspecific increase post challenge was found. The rapid and considerable increase of CD8+ cells occurred post challenge, on day 2nd post challenge, the area positive of CD8 + cells in intestine and spleen was 37 % and 50 % in chicken immunized with live oocysts, and was 39 % and 50 % in chickens immunized with precocious oocysts. No notable differences were observed between the immune responses against wild and precocious oocysts. The lymphocyte responses of immune chickens noticeably increased post infection than the control chicken. The response level of chickens post challenge was remarkabley higher than the level without challenge. There was not significant difference between response level of chickens immuneized with wild oocysts and chicken immune with precocious oocysts.Keywords：E imeria tenella,wild oocysts,precocious oocysts,cell immunity,mucosal immuniy,chickens1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The mathematical programming and optimal control theory were introduced into the optimal design of axial flow turbine stages. First, on the basis of conditional extreme value of non linear mathematical programming, the meridian channel shape and vane geometric parameters of axial flow turbine stages were calculated. Then, with the optimized meridian channel of axial flow turbine, the perfect physical model and mathematical expression of the proposition of optimal flow pattern, including all performance in turbine stages, were put forward. This problem was further recasted into a typical control to maximize specific performance index such as that of work of stage with given initial state, fixed terminal condition and constraints of part of state terminal variables. By using cost function method and DFP conjugate direction method, the optimal parameters were calculated.Keywords：mathematical programming,optimal control theory,turbine stage,optimal design1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The key technology of the vision system of fruit picking robot is to extract fruit object from images quickly and exactly. The substance of object extraction for the vision system of robot is image segmentation. Among lots of fruits and vegetables, there are a considerable color difference between their ripe fruits and their backgrounds, yet the fruits of the same type are of almost the same color. Then the distribution of color between the ripe fruits and the backgrounds is different in Color Space. Based on these features, an algorithm to extract fruits object from images, which is based on the approach of color space reference list, was put forward. A color space reference list was built from fruits swatch images in the algorithm. The fruit object was extracted by using the list. Compared with other image segmentation arithmetic, this arithmetic base on color images, then the background will be more clean when the image is processed. Because of that there is no complex operation, this arithmetic is propitious to real time image process. Experiments on strawberry, orange and tomato were respectively conducted by adopting several color models usually used in image processing. The results of these experiments showed that ,by using this algorithm, expected results can be achieved under L *a *b,HSV,YC b C r color models.Keywords：fruit picking,vision system,image segmentation,color space reference list0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The management of the bitstream and the parsing of video data are the basis of the video decoder. Video decoder algorithm based on LAN adopts three kinds of buffers were offered to store the bitstream. The receiving buffer stores the bitstream come from the server. The working buffer directly gives needed bits to the decoder. The middle buffer associates the above mentioned two buffers. The bitstream parsing consists of two steps. Firstly the video data must be extracted from the compound bitstream, then required bits are provided for the decoder. Since the decoding was asked to begin at any time, the client requests the server to transfer the information to fill the indispensable parameters before receiving the bitstream, furthermore the decoder ignores all the bitstream until the first I frame comes. In order to decode the B frame following the first I frame, the algorithm creates a previous prediction picture. The Bayer ordered dithering was used to show the sequential pictures nicely. The algorithm have been used to video monitor system of bank, and have good stability. Offers a satisfied resolution for the similar applications.Keywords：MPEG 1,video,bitstream,decoder,algorithm0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The platform originates from information service management and combines with the practice of most trade corporation in China. The corporation information platform was reconstructed by introducing B/S mode, making full use of advantages such as transmission convenience of modern network technique,data precision and timing and widely communion,and overcoming some disadvantages such as informational isolation of correlative corporation with traditional management information system, as well as ineffective use of data, the limits of time and zone. The retail corporation management was regarded as the core of the platform that supplies providers with the functions of relative management,analysis and system information service and so on, and admits customers into integrated management. At the same time decision making and analysis in graph was adopted to decide effectively,and virtual products displayed in 3D interaction to meet the customer need.Keywords：enterprise information,S SCM,CIMS0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：The computerization of highroad information is not only an indispensable requirment of the development of the national economy but also an important part of method to improve the throughput ability of highroad freight. This dissertation brings forward a feasible and useful design model of the HFIS(Highroad Freight Information System) and its realization plan on the basis of some network theories and application technologies. This system takes advantage of the Internet, and bases on the TCP/IP protocol and mobile communication, can realize the information real time collection and transmission from remote points. In the system, the issuance of information can be done through telephone, fax, Internet and mobile phone. The HFIS uses short message gateway to connect the mobile network and internet, and makes the two systems share some public information, and provides a new method to manage the freight information. It's now one of the earliest information system in China to manage the freight information by using the mobile short message technology and has some advantages for demonstration.Keywords：freight information,short message gateway,CMPP0|5|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：garden planning,open space total scale,reforesting on farmland,small towns0|7|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Abstract：A predator system of 2 dimension was qualitatively investigated,where the prey population having the collectively defensive capability. The positive boundness of the solutions was proved; and at the condition of the fold bifurcation, the portraits structure near the positive equilibrium and the global structure of the portraits were obtained. The results showed that whether the predator persist on or perish out depends on the intrinstic increasing rate of the prey population: If it is lower, the predator will perish out; Increasing it, the predator's persist region extends; But if it is higher, the collectively defensive capability of the prey population make the predator difficult, and the predators persist region contracts.Keywords：predator system,saddle node bifurcation,portraits structure1|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
- Keywords：solid phase extraction,environmental water,pesticide,GC NPD0|6|0<HTML><L-PDF> <Meta-XML>Updated：2024-02-27
