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1.
The ride comfort of more than ten representative motorcycles is evaluated by the r. m. s acceleration value through road test. Then the investigation on ride comfort, with five grades, is carried out through these motorcycles rode by a dozen drivers. Using statistics and fuzzy mathematical methods, the fuzzy evaluation model of motorcycles ride comfort is built to discuss the relationship between the vibration magnitude and human reaction. Finally, according to this model, two motorcycles ride quality are evaluated. 相似文献
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To make up the vacancy of the evaluation methods for ATV ride in the world, the pratical feature of ride comfort of ATV are studied and analyzed. Based on the ISO2631 and ISO5349, the objective methods of ride com-fort of ATV are proposed. This method uses the total root mean square of weighed of three axles to evaluate the vibration of the handle and seat. Road tests and experiments on rolling drum experiment table with the test system on ride comfort of some typical ATVs are conducted, the result of the two tests are matched each other, so the evaluation method can well reflect the effects of the vibration on human body. 相似文献
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《保鲜与加工》2003,(10):6-9
A kind of useful virtual dynamic model of motorcycle is established with dynamic analysis software ADAMS. Some related key problems regarding dynamical modeling is researched. By inputting road load spectrum, the ride comfort of motorcycle is analyzed and the simulating results are evaluated. Based on the evaluating results, the strength of front and rear damping springs are optimized and the performance of the redesigned product is improved. 相似文献
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The human thermal comfort is influenced by many factors, and it is fuzzy, so it is a kind of stochastic fuzzy variable. So the evaluation of human thermal comfort is fuzzy also. and the method assessing the human thermal comfort with fuzzy mathematics is reliable. The factor affecting the human thermal comfort is analysed and predigested. Based on the analysis above,the methodology of assessing the thermal comfort is presented. The methodology resolves the decision_making continuum, so it lightens uncertainty of traditional method. The simulation results are compared with the Predicted Mean Vote index, and they are in good agreement. The study shows that the methodology of assessing the thermal comfort is reliable,and it presents a new approach for studying the human thermal. 相似文献
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A multi rigid body dynamic model of an all terrain vehicle (ATV) is established in MSC.ADAMS. The model takes into consideration the body, suspension, frame and the steering system. According to the method of superposition of harmonic wave, a Grade B road file is created in ADAMS for the riding comfort test. The engine excitation is analyzed. The infliction for engine excitation to ADAMS is achieved. The ATV ride comfort simulation is carried out with the excitation of the engine, and the seat vibration is evaluated using an evaluation method programmed via MATLAB. It has laid a good foundation for further analysis. 相似文献
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The situation and the future of the automotive industry information construction is shown in this paper. The significance of Chinese automotive industry information construction is discussed,and the technology base and system structure is also described. The function and the structure of information system by one application of marketing plotting system in one automobile factory's E-commerce are introduced.The important significance for develop and research of product and strategic decision is shown by building market demand information system. 相似文献
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In the new environment, product development is the core of product innovation and quickly responsive to the market for the enterprises. The speed and effectiveness of development is the key factor to the success of product development. The design for business is the key technique in achieving the effectiveness of product development. And manufacturing system is the bridge between business and products. The design method of facing business is discussed, and the design flow and content of manufacturing system supporting facing business are pointed out. At the same time, the author also sets forth the construction definition, the construction design and the detailed design of the manufacturing system. So the design flow of manufacturing system facing business is established. 相似文献
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为了能够对青海省黄河谷地贵德县旅游气候资源价值做出评价,指导旅游产业健康持续发展,笔者利用青海省贵德县气象站1961—2015年55年观测的资料,计算旅游气候舒适度的3种指数,并分析该县旅游气候舒适度。结果表明:贵德县旅游气候最舒适期为每年的6—8月,较舒适期是5月和9月,舒适期在4月和10月,不舒适期为11月至次年3月。旅游期内舒适程度:7月8月6月9月5月,均呈上升趋势。旅游舒适天数呈显著增多趋势,每10年增加1.7天,平均舒适期为142天,占全年天数的38.9%。 相似文献
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Automobile comfort dynamic simulation is necessary when we predict and evaluate the comfort of a automobile or optimize performance of automobile. The nine DOF vibration model of automobile is established , which acts root mean square value of body in multiple work conditions as comfort evaluation indices. Based on the comfort simulation, the Hongyan 1160 is predicted in the way of comfort. The programmes can be used in many different automobiles . The computational result indicates that the model can simulate vibration of automobile truly. It is significant to research automobile comfort evaluation to optimize performance of automobile and comfort simulation .The computational program can be applied to optimize or simulate which has some reference value. 相似文献
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Some results are presen ted which related fault-tolerance degrees of a multibussystem with the con nectivity of the bipartite graph induced by the system. Using the best con nectivi-ty bipartitegraph. we also present two classes of multibus systems which have the best degree of busfault tolerance and the best degree of bus-processor fault toferance as well as better degree of proces-sor fault tolerance. 相似文献
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This paper introduces a method of solving the problem of leather cavity measurement in shoe CAD/CAM by industrial CT technology. Concentrating on peculiarity and requirement of leather cavity measurement, this paper presents a X-ray industrial CT system scheme, which not only satisfy the requirement of leather cavity measurement but also can achieve general industrial CT. measurement. The achievement on data collection system and motion control of stepping motor is emphasized. 相似文献
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Roll pass design is one of the important content of making the rolling technology of section steel.The traditional pass design relies mainly on artificial experience,which brings some tedious calculation and great consumption of raw materials.In order to improve production efficiency,the constitute and the design methods of the roll system for thread-steel-bar are analyzed during stretching,further rolling and finished rolling.The mathematical models and the(experience) formulas used for the roll design in the past are revised.The computer aided roll design system is developed for thread-steelbar based on the structural means of compiling program.The authors adopt Visual Basic6.0 as a visual program tool,and combine the basic design theory of the thread-steel-bar's roll and the practical experience.The system can shorten the design cycle of the new product development,and reduce the energy consumption of the rolling mill and the distribution of production. 相似文献
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A model for indoor thermal comfort assessment was investigated in this paper. By using this model, the indoor thermal comfort of low energy consumption buildingwith buried pipe system was evaluated. The result shows that the buried pipe ventilationcan improve indoor thermal comfort in hot climates. 相似文献
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设计了一套水暖锅炉自动调温系统应用于农业生产,主要部件包括主机、辅机、控制系统和水暖管道装置等。基于PLC的锅炉补水泵控制系统能够对整个锅炉的运行状况进行监测、报警、控制,保证锅炉正常、可靠地运行。该设计克服了以往养殖水暖锅炉中存在的缺陷,可以保证锅炉补水泵控制系统稳定可靠工作。 相似文献
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辣椒cDNA-AFLP体系的优化与应用 总被引:1,自引:0,他引:1
以辣椒花蕾和嫩叶为试验材料,对影响辣椒cDNA-AFLP体系的关键因素进行了探讨,建立了适宜于辣椒基因差异表达的cDNA-AFLP体系。结果表明,Trizol法适用于辣椒花蕾和嫩叶总RNA提取;SMART法合成双链cDNA效率较高;利用Taq I/Ase I分步酶切cDNA各3h可酶切完全;连接产物最佳稀释倍数为15倍;预扩产物稀释15倍经选择性扩增,PAGE电泳可以获得带型丰富且重复性好的结果。辣椒cDNA-AFLP反应体系的建立为辣椒基因的差异表达分析奠定了基础。 相似文献
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舒适度是人居环境的重要评判指标。利用宁波市1957-2016年逐日气象数据和2005-2016年逐时气象数据,对宁波市夏季舒适度变化特征及其对气温要素的响应进行分析,开展了基于舒适等级累积时数的日舒适度评判模型研究。结果表明:宁波市60a夏季舒适日数年际间波动变化不明显,但夏季不舒适日开始时间提前趋势明显;舒适度指数日变化与气温日变化趋势相似,13时最不舒适;宁波市夏季舒适日数与平均气温、平均最低气温、平均最高气温、极端最高气温和高温日数显著相关;利用线性拟合结果,建立了基于舒适等级累积时数的宁波市夏季日舒适度评判模型,对模型分别进行历史资料回代模拟和2016年一致性验证,舒适和不舒适等级历史回代一致率较高,2016年模型验证中各等级一致率均在91.7%以上,表明新模型评判效果较好,能够满足业务服务需求。 相似文献
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Application system generally refers to all kinds of computer information system. It aims at improving the sharing and application of the resource. The resource in application system usually means data resource. For computer management and maintenance, there are not only data resource, but also program resource and network resource. Effective management of this resource is key to ensure proper work of the application system. In this paper, the basic pattern and policy for resource management is put forward and a method to build and realize the resource layer that lies between database layer and application layer is to be found. This management layer, which skillfully connects the application system with resource and establishes good base for application and exploitation of system, is named as resource management system. 相似文献
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Product design is a procedure that enterprises meet the needs of consumers; conceptive design is one of the steps in product design and it directly considers requirements of consumers. So how to supply consumers with satisfying function is the essential point. On the basis of function analysis of Value Engineering, the paper puts forward a new method to exercise function definition and function analysis, implements conceptual product design procedure with database techniques.A new way is gotten to convert requirements to conceptual product. 相似文献