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- Abstract：Millet lcy-b gene was cloned by the Touch Down-PCR. Sequence analysis showed that the open-reading frame of the cDNA was 1?782 bp and encoded a putative protein with 594 amino acids. The molecular weight of the putative protein was 67?724?u. All of the proteins encoded by lcy-b gene in plants contained a FAD/NAD (P) binding region. The homologue of the obtained gene with monocotyledon daffodil was higher than that of the dicotyledon. And the homologues of the proteins were higher in middle and tail parts. Southern blottiog indicated that lcy-b gene was one copy of the millet genome.1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：A new gene (f103) was isolated from Setaria italica cDNA library. The sequenced and characterized. f103 gene was composed of 819 nt. The encoded putative polypeptide had a molecular weight of 14 113 u and contained 130 amino acid residues. Southern blotting analysis indicated that f103 was one copy in the genome of millet and had homologous gene in maize. Northern blot analysis showed that f103 mRNA accumulated in stems, inflorescence, developing seeds, but not in leaves. The analysis by a biology software indicated that the hydrophibic domain was dominant in the structure of the deduced protein which had several phospho-sites and might be a nuclear targeting protein. All these would be the structural basis for the function of F103 protein.Keywords：millet,f103 gene,cDNA library,sequence analysis5|2|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：arbuscular mycorrhizal fungus,Rhizobium leguminosarum,faba bean,organic P,nitrogen1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：microecologics,lactic acid bacteria,antibiotic,antibiotic susceptibility1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：Ecosystem health is a newly emerged field with great potential, and the basis for ecosystem service and the new aim and new method of ecosystem management. Farmland ecosystem is a typical man-made ecosystem, and a healthy farmland requires a scientific management, rational structure, environment-friendly, high productivity and high sustainability, as well as the integration of nature's material and energy cycling, supply of healthy, safe, high quality and various food source to human society, and correct and effective service functioning. The farmland ecosystem health assessment should be assessed with integrated measures, with macroscopic and microscopic studies based on the designed management objectives. The eco-environment factors, social economy factors and human health factors should be considered when we choose the parameter. At the same time, the international criteria and widely accepted methods should be applied in the standard classification of parameter. Based on the concept framework and basic property of farmland ecosystem that has been mentioned above, this paper try to find the suitable parameter which can synthetically assess farmland health. With Analytical Hierarchy Process, the present study regarded the assessment aim as the realization of sustainable, healthy and high efficient farmland ecosystem, and established a set of parameter for farmland ecosystem health assessment, including structural parameter, environmental parameter, productive parameter, sustained parameter and management parameter. Moreover, the standard classification of indicator system was given in this paper.Keywords：ecosystem health,farmland ecosystem health,indicator system for assessment,indicator standard1|7|0<HTML><L-PDF> <Meta-XML>Updated：2023-12-22
- Keywords：plant growth regulator,SHK-6,soybean,yield,protein,amino acid1|6|0<HTML><L-PDF> <Meta-XML>Updated：2023-12-22
- Keywords：deciduous fruit trees,organ regeneration,medium,explant,culture condition1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：the northern ectone,function of ecosystem,ecological degradation0|6|0<HTML><L-PDF> <Meta-XML>Updated：2023-12-22
- Keywords：avian influenza,H 5N 1 strain,vaccine,poultry1|6|0<HTML><L-PDF> <Meta-XML>Updated：2023-12-22
- Keywords：Chlamydia psittaci,major outer-membrane protein,vaccine,broilers1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：Pathological changes of sacculus rotundus of rabbits which had different ages and were infected with rabbit haemorrhagic disease virus (RHDV) were studied. RHDV in liver, kidney and spleen of the experimental rabbits was also tested by both the enzyme-linked immunosorbent assay (ELISA) and the quantitative analysis of intraepithelial lymphocyte(IEL) in the villus epithelium of sacculus rotundus. The results indicated that the infected rabbits of two months old did not appeared abnormal changes in clinical symptom, necropsy and histopathology. RHDV antigen was not detected in sera, liver, kidney and spleen. But the infected rabbits older than two months had obvious alterations in clinical symptom, necropsy and histopathology, and contained high level of RHDV antigen in sera. Immunohistochemistry showed a positive immunoreactivity of RHDV antigen in the liver, spleen, kidney and sacculus rotundus in these infected rabbits. The number of IEL in the villus epithelium of sacculus rotundus of the rabbit younger than two months increased significantly following infecting. The number of lymphocyte in proper tunic also increased obviously.Keywords：rabbits with different ages,sacculus rotundus,RHDV,IEL,pathology3|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The Dirichlet problem of the one-dimensional p-laplace was studied extensively. Many scholars have proved the existence of the solution, the weak solution and the positive solution of the Dirichlet problem. But there is a little research about the one-dimensional p-laplace with the mixed boundary value problem. Using the method of time-mapping and Leray-Shauder degree to study the existence of solutions of the one-dimensional p-Laplace with the mixed boundary value condition was studied. From the lemma of Leray-Shauder degree the existence theory of the positive solution was put foward. The result indicated that the theory is correct.Keywords：p-Laplace,time-mapping,mixing boundary value condition0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The impulse-momentum equations were introduced by integrating the canonical equations of multibody systems which are not valid for the dynamics analysis in the impacting processes. A method of automatic searching collision positions was given in multibody impact systems with non-fixed collision positions and many kinds of collision positions, such as the multibody systems consisted of two single pendulums.Keywords：canonical equation,impact,impulse-momentum,collision position,automatic search0|6|0<HTML><L-PDF> <Meta-XML>Updated：2023-12-22
- Abstract：There are many research papers about mathematic theory of stochastic course and stochastic differential equation, but no a whole theory can be used to analyse nonlinear system. On the base of equivalent linearization method about certain nonlinear system, a equivalent random systems method was developed and used in analyzing the dynamic response of nonlinear random structures. Considering the multi-degree of freedom system, the formula of equivalent random systems method was expounded. The nonlinear mono-degree of freedom system was taken for example. The numerical results showed that the responses of the proposed approach were much close to the Monte-Carlo solutions, and the time used in computing was much less than the Monte-Carlo mothed.Keywords：nonlinear random structures,equivalent random systems method,dynamic response0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：pyridine derivatives,1,3,4-thiodiazole,herbicidal activity,synthesis2|6|0<HTML><L-PDF> <Meta-XML>Updated：2023-12-22
- Abstract：Tank seat is one of the most important components in tank cabin, which has a great effect on the diver fatigue. Aimed at stationary parameters evaluation of tank seat, an evaluation method based on fussy mathematics is established. The range of each parameter was ascertained according to human dimension. The evaluation factors and the subjection degree function were researched, and the weight of each factor was ascertained by investigation.Keywords：tank seat,stationary parameters,evaluation model,0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Keywords：rice,transplanter,seedlings guide-canal,movement analysis0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
Study on comprehensive evaluation model of human body constitution based on artificial nerve network
Abstract：BP network model of the artificial nerve network was introduced to do the quantitative research to the comprehensive evaluation of human body constitution. In view of complicated and nonlinear relation between constitution items and body comprehensive constitution, the constitution items were taken as the input and the expert's comprehensive evaluation of human body constitution was taken as a desired output for modeling the comprehensive evaluation of human body constitution. The modeling result indicated that the BP network model not only has high precision of fit, but also has good prediction effect. BP network model can really reflect the comprehensive constitution of human body. A new approach for the quantitative research of the comprehensive evaluation for human body constitution was provided.Keywords：human body constitution,comprehensive evaluation model of constitution,artificial nerve network,3|6|0<HTML><L-PDF> <Meta-XML>Updated：2023-12-22- Abstract：The engagement mathematic model of crossed helical involute gears was built. The spacial figure of gears contact was drawn up by using MATLAB software. The instantaneous contact ellipse is revealed by partial enlargement. The extremity curve of the velocity vector at the contact point was also drawn up. The basic platform of dummy assembling, three-dimensional animating and resembling the real motion were constructed. A new seeable method of gears contact analyzing was explored by using computer.Keywords：crossed helical involute gears,gears contact analysis,MATLAB1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：A method was introduced with Pro/E software for the accurate modeling and assembling of gears;the parameter driver and expression for design were created in accordance with the style of Pro/E. The interference of gears assembled can be tested. This method was proved to be an ideal gear transmission design way.Keywords：Pro/E,involute,modeling,assembling0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The system collected sequential video data, and send the data to TMS320DSC21 for M-JPEG compression process. The compressed data was packed and sent to network. The monitor computer can receive, display, save and play back the video data from remote network camera. And the computer can control remote network camera and cradle head. The system provides a new method for remote real-time video monitoring, the digitalized management of monitor data and network transmission of video data. Because of the using of M-JPEG compression, the management of video data was more reliable. The system uses TI's TMS320DSC21 as processing platform, so it has convenient fixing, flexible configuration. The system is used in several cases and has good market prospect.Keywords：TMS320DSC21,video data Compression,M-JPEG,network camera1|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
- Abstract：The traffic flow of motor-vehicles and non-motor-vehicles was observed with method of man-accounting six periods of time in a day at typical congesting road in Beijing, and created observation tables, figure and database of every intersection for traffic flow with flow-direction, then the characteristics and changing rules of traffic flow were analyzed. The capacity of the section can't meet the need of driving car, and driving cars in the south-north direction must wait for multi-queue at the intersection, which arouse badly traffic congesting pre-post sections, the capacity and improving status of traffic, traffic management and control, traffic order should be typically thought over. These results are real and reliable, which are offered for some department of decision-making to improve the traffic congestion, forecast status of traffic flow and program traffic road-net.Keywords：traffic congestion,intersection,traffic flow,0|6|0<HTML><L-PDF> <Meta-XML>Updated：2023-12-22
- Keywords：natamycin,yeast,inhibition,minimum inhibitory concentration0|6|0<HTML><L-PDF> <Meta-XML>Updated：2023-12-22
- Abstract：Studies on the possibility that the biodegradable mulch film were carried out by using the carboxymethyl corn powder (CMCP) instead of the carboxymethyl starch (CMS). The effects of CMCP or CMS content in the film on transmissivity, intensity, elongation ratio and the viscosity were discussed. The results showed that CMCP film was about the same characteristics as CMS film. When content of CMCP or CMS exceed 3.5%, the transmissivity, intensity and elongation ratio will gradually drop down, but the viscosity of making film solution will be increased. According to mechanical property, viscosity of machine spray coating and transmissivity, the favourate adding quantity of CMCP was about concentration of 3%.Keywords：carboxymethyl corn powder,carboxymethyl starch,biodegradable mulch film0|1|0<HTML><DownloadPDF> <Meta-XML>Updated：2023-12-22
