共查询到20条相似文献，搜索用时 15 毫秒
1.
Automatic mechanical transmission (AMT) bed testing is one of the important jobs for AMT researching and development. Through bed testing we can finish many works such as testing performance of AMT, AMT-engine matching, optimizing control rules and so on. AMT testing bed is built up base on the sample AMT developed by ourselves. Data are transmitted between PC and SCM though RS232 COM. By this way electronic throttle, clutch and shifting are controlled. Hardware port can be read in Windows 2000 by calling the unpublicized functions. Testing-controlling Program is also developed and AMT bed testing can be carried out with advanced test and control technology. 相似文献
2.
Sun Dongye Qin Datong Yang Yalian 《保鲜与加工》1998,(4):1-6
Based on the kinematic and kinetic characteristics, the friction model of a metal pushing V(belt continuously variable transmission (CVT) is established in this paper. The relation between applied forces and speed ratio as well as transmitted torque is analysed. The coputational formulas on the tension forces of steel ring and compression forces between metal blocks are derived. The theoretical bases for designing a metal pushing V belt CVT equipment and its control system are provided. 相似文献
3.
Considering the difficult of acquiring and transmission the signal from the moving equipment, a new fault diagnosis monitoring system is presented. The system acquires the state signal from the moving equipment by data acquisition module that based in W77E58 high-speed SCM, and transmits the data fast by wireless mode. The signal data can be use for fault diagnosis and precise analysis. The system has the ability for acquiring abundance of data with a high speed, the ability for high accuracy data conversion, and has a function of programme controlling gain and programme controlling low-pass filtering. The successful application of this system on the vibration monitor about the material-transporting bogie in an iron works of a domestic steel enterprise proves the stability and credibility about the design project, also testifies its practical value and versatility. 相似文献
4.
Lai Xinchang 《保鲜与加工》1988,(4)
This paper comprehensively discusses the interface between AutoCAD and the advanced language. It presents three main ways: by means of . DXF file, SCR file and AutoLISP language. The former two have been used by some people in China. This paper presents the method with its programs for its accomplishment. As to the last one, the author has developed its application with the method for its accomplishment, the problem and the handling method for deletion of library function. AutoCAD can be used as support software for microcomputer CAD. This paper provides some references for technical personnel concerned. The programs in this paper have been all verified by IBM PC/XT, GWO520-CH. The pictures are drawn by DMP-56A. 相似文献
5.
Genetic analysis for protein content in indica rice 总被引：5，自引：0，他引：5
Analysis of genetic main effects and GE interaction effects for protein content (PC) and protein index (PI) of indica rice
(Oryza sativa L.) was conducted for two year experimental data by using a genetic model for quantitative traits of seeds in
cereal crops. Nine cytoplasmic male sterile lines or maintainers as female parents and five restorer lines as male parents
were used for a NC II mating design in 1995 and 1996. The results indicated that PC and PI traits were simultaneously controlled
by genetic main effects as well as GE interaction effects. For PC and PI of rice, the embryo interaction effects (embryo additive
and dominance interaction effects) were important as effects of triploid endosperm, cytoplasm and diploid maternal plant.
The estimates of narrow-sense heritability for PC and PI of rice were 85.3% and 77.9%, respectively. The interaction heritability
was found to be larger than the general heritability for PC and PI of rice. Significant relationships for components of different
genetic effects between PC and PI were found. The GE interaction covariances tended to be positive.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
6.
Continuously variable transmission (CVT) is the ideal transmission for automobile, it is also one of the most important research items of researchers and automobile companies all over the world. In order to research vehicle with torque converter as starter and metal pushing belt as high speed transmission equipment(dual state CVT system), based on the test data of engine and torque converter, the integrated control strategy for vehicle with dual state CVT system is proposed and integrated control simulation for car with dual state CVT system is finished at the condition of multi mode. The research results provide the theory method of analysing and designing for CVT vehicle. 相似文献
7.
Continuously variable transmission (CVT) is the ideal transmission for automobile, it is also one of the most important research items of researchers and automobile companies all over the world. The dynamic simulation model is established and integrated control strategy of standing start is proposed for dual mode CVT vehicle, aiming at automatic vehicle with torque converter as a starter and metal pushing belt as a higher transmission equipment (Dual mode CVT vehicle), on the base of engine and torque converter performance experiment. Simulation result shows that vehicle performance can be improved by using the control strategy proposed. The research results provide the theory method of analyzing and designing for CVT vehicle. 相似文献
8.
According to our previous investigations, resistance to Phytophthora capsid in Capsicum annuum genotypes, ‘Line 29’, ‘PI201232’, ‘PI201234’ and Serrano Criollo de Morelos 334 (‘SCM334’), seems to be controlled by three genes. In order to determine the genie relationships between these four sources of resistance, three experiments were conducted which included the four genotypes, their F1s, F2s, F3s and BC1 generations together with the susceptible pepper genotype ‘Morron INI A 224’. Inoculations were made, when plants had 4—6 leaves, by irrigating the culture substrate with a zoospore suspension of P. capsici isolate ‘Bl’. Though the four genotypes showed percentages of resistance close to a 100%, none of them actually reached this level in the three experiments. ‘SCM334’ was the most resistant genotype, transmitting a high level of resistance to its F1, F2 and BQ generations. ‘Line 29’ was more resistant than ‘PI201232’ and ‘PI201234’. However, the F1 F2 and BQ generations of these three lines showed similar degrees of resistance. The four genotypes seem to have one of the three genes postulated for their resistance in common. All genes displayed a similar level of resistance, except the specific genes of ‘SCM334’, the effect of which was slightly higher. Several working procedures are suggested for breeding programmes. 相似文献
9.
小麦蛋白质含量和优质亚基遗传 总被引：12，自引：1，他引：11
研究了小麦子粒蛋白质含量和优质高分子量麦谷蛋白亚基对小麦品质的影响及其互作关系。结果表明，控制蛋白质含量的基因作用主要是以加性效应为主，也存在非加性效应，F1的蛋白质含量与双亲的蛋白质含量的平均值高度相关，蛋白质含量的一般配合力方差大于特殊配合力方差，F2子粒蛋白质含量的分离呈正态分布。在优质育种亲本选配上，一般配合力比特殊配合力更重要一些。普通小麦品种高分子量麦谷蛋白亚基受遗传控制，不受环境影响，具有品种特性；其在F1中呈共显性和倾母遗传现象，在F2中遗传行为遵从孟德尔的基因独立分配和自由组合规律。在小麦品质改良中既要重视蛋白质的含量，更应重视蛋白质的质量，即数量和质量改良途径并重。 相似文献
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In almond, the presence of double seeded nuts significantly reduces their commercial value. For this reason, in breeding programs of this species, seedlings producing double seeds are usually eliminated. In order to avoid this trait in the offspring and increase the efficiency of the breeding programs it is important to know its genetic control. In this work, heritability of double seeds was estimated by midparent–offspring regression (narrow sense, h2) and by variance components analysis (broad sense, H2) for 3 years, in a population with a combination of full-sib and half-sib offspring coming from eight crosses designed for this objective. Heritability was high by both methods every year, and the values calculated by variance components were higher than those estimated by regression. The average ratio h2/H2 0.69 implies some influence of a non-additive effect for this trait, such as dominance and environmental effect. In this case, the influence of the temperatures preceding blooming on the percentage of double seeds can be inferred from our results, with lower temperatures increasing the percentage of double seeds. In the crosses between parents with high percentage of double seeds a normal (Gaussian) phenotypic distribution was observed. For crosses between one parent without double seeds and parents with high-medium percentage of double seeds a right-skew distribution (L-shaped) was observed, and certain transgressive segregation was observed in the descendants. This transgressive segregation was confirmed when both parents presented null percentage of double seeds. The results confirmed the complex architecture of this trait transmitted quantitatively, where additive, non-additive and genotype-by-environment interaction effects play an important role. 相似文献
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14.
The important strategy decision making system, one of the difficult problems of the research of Group Decision Support System, is an open complex huge system, which is almost non structure and hard to construct. In order to organize and take advantage of decision making departments more effectively, this paper presents the thought of combining Multi Agent System with Dynamical Alliance and set up the GDSS Framework of Organization Oriented Dynamic Alliance based on Multi Agent after analyzing the characteristics of MAS and Dynamical Alliance. Different departments can be organized more effectively on the three layer system structure composed of the strategy layer, the tactics layer and the operation layer. The decision making layer of each department is composed of the integrate decision making subsystem, which means that the decision making layer of each department can be used solely or be a part of Dynamic Alliance to make the important strategy decision and the system gets more flexible. 相似文献
15.
To provide various production for fulfilling the customer's requirements to the market has been the goal of manufacturing enterprises. The order form is the representation of customer's requirements. It has been the headstream and end-piont of the management of enterprises and SCM. The idea and it's realization of SCM to the whole process are introduced, that is driven by the order form. It's derived from several aspects, including the characteristics of the production's configuration, the type of order form and supplying, the manufacture organizing mode and the material requirements, the way of SCM in manufacturing enterprise and the model of SCM to the whole process driven by order form, realizing technique, etc. 相似文献
16.
3种植物对镉污染土壤修复的试验研究 总被引：4，自引：1，他引：3
为探究植物修复技术在济源镉(Cd)污染土壤的应用特征和效果,笔者以不同Cd污染程度的实际土壤为对象,采用盆栽试验,对比三叶鬼针草、黑麦和印度芥菜对Cd的耐受、富集、转移能力及修复效率。结果表明：污染组植物的生物量无显著下降,供试植物均具有较强的Cd耐性。3类植物富集特征不同,地上部分富集Cd浓度顺序依次是：三叶鬼针草＞印度芥菜＞黑麦。3种植物中黑麦地下部分Cd含量最高,轻、重度污染组的Cd含量分别达到11.95 mg/L、28.56 mg/L。三叶鬼针草对Cd具有较强的转移能力,其中在轻度污染土壤中转移系数(TF=2.23)最大。此外,三叶鬼针草修复效率最高,轻、重度污染组分别为2.04%、1.59%。综上所述,三叶鬼针草的生物量、富集转运系数和修复效率均高于黑麦和印度芥菜。因此,三叶鬼针草可作为济源Cd污染土壤修复植物之一,为当地土壤Cd污染治理提供理论指导和技术依据。 相似文献
17.
In deviated deep hole directional drilling operation, drill collar and heavy drill pipe are used to provide enough weight on bit in order that penetration of rock can be conducted and drill-string stability can be maintained. However, as a result, this practice usually puts overloaded torque and tension force on the drill-string and hence results in early fatigue failure of drill-string. Based on the elastic deformation and stability analysis of the bottom hole assembly of drill-string, a discussion on the critical condition to keep drill-string in stabilization and the planning criterion to determine bottom hole assembly is presented . Optimized planning of BHA can be achieved by making the drill pipe partially work in compression state, which may considerably reduce the torque and tension force on the drill-string with the weight reduction of drill collar, and therefore reduce the failure possibility of drill-string. 相似文献
18.
Siti Hazirah Zolkafli Maizura Ithnin Kuang-Lim Chan Mohd Isa Zainol Abidin Ismanizan Ismail Ngoot Chin Ting Leslie Cheng-Li Ooi Rajinder Singh 《Breeding Science》2021,71(2):253
Oil palm is continually being improved via controlled crossing of selected palms to ensure sustainable yields and productivity. As such, correct parental assignment is important as the presence of illegitimates will compromise the progress of improvement. In the present study, we determined the optimal number of microsatellite (SSR) markers for detection of illegitimates in selected oil palm crosses with high confidence. Determining the optimal number of markers to assign parentage will ensure that the DNA fingerprinting will be cost effective for routine use as a quality control tool in oil palm improvement programs. Here, we evaluated a wide range of crosses that included a cross derived from wild germplasm palm. The results revealed that markers with high PIC are informative and detect most of the alleles present in a cross, including those exhibited by the illegitimates. A larger number of optimum sets of markers are needed to detect all illegitimates for crosses with higher levels of genetic diversity. The optimal number of polymorphic SSR markers determined in the present study can ensure that appropriate quality control is implemented for oil palm improvement programs. 相似文献
19.
The acquisition of physiological signals is the first step of its analysis and processing. The development mode for PC/104 module is introduced and the design of multichannel acquisition system for physiological signals based on PC/104 is also put forward. The system hardware mainly includes PC/104 embedded computer,DIAMOND-MM-16-AT acquisition card and four-channel amplifiers. Windows 2000 is used as operating system for PC/104 embedded computer. The multithread program to sample data is made by means of programming language Visual C++ 6.0. The experimental results show that the system can be applied to sample, analyse, and process the physiological signals. The system also has lots of advantages, such as small volume, low power, firm structure and steady performance. 相似文献
20.
In order to study the cooling characteristics of the nozzle, a test platform is designed and developed for spray cooling feature measurement based on unsteady state heat conduction. By heating and keeping Q215 metal samples up to some surface temperature, a series of temperature data are collected by S7-200 modules during spray force cooling. Through Visual C++6.0 and Matlab interface programming, a series of regression equation with thermodynamic property versus temperature, such as density, specific heat capacity, and thermal conductivity etc., and with temperature versus sample time are obtained. The surface heat transfer coefficient and spray cooling feature of nozzle can be indirectly measured by the regression equations. The relation between surface heat transfer coefficient versus temperature, spray pressure and water intensity are investigated by means of the testing equipment. The experiment result shows the method is feasible and can be used in spray cooling feature measurement for all kinds of nozzle. 相似文献