夏大豆丰产增效技术研究

采用正交试验设计,研究了品种类型、栽培密度和种植方式3个因素对大豆产量的影响。结果表明：品种是夏大豆产量及各农艺性状的主要影响因素;3因素对夏大豆产量影响强度的顺序是品种类型〉栽培密度〉种植方式;在本区生态条件下,获得夏大豆最高产量的理论组合为：品种为有限类型沧豆6号,栽培密度2．4万秭／hm^2,种植方式为行距40cm。     

有急回作用的四杆机构计算机辅助设计

有急回作用的四杆机构是应用较广的四杆机构之一。笔者就其传动角提出了新的评价标准,并借助于计算机求得具有最佳传动角的平面急回四杆机构,为设计者提供了新的有效的设计方法。     

车载式火箭弹储存箱设计与实现

车载式便于能够在一定的距离范围内流动作业,期间火箭弹随车携带,存在安全隐患,采取有效措施,确保作业弹药安全储运非常重要.在此对车载式火箭弹储存箱的设计与实现进行了详细分析,依据有关标准和运输安全以及皮卡车空间尺寸要求,设计两侧开门和手动储弹架结构的车载式火箭弹储存箱,其中箱体具备防火、防盗功能.储弹架的储弹轨道采用整体夹紧机构,储弹轨道的上、下导轨用铝合金一次成型工艺制作.解决了火箭弹存取不便利及固定不牢靠的安全问题,同时满足装载4种类型人工增雨防雹火箭的业务需要.该存储箱已投入实际应用,取得较好的效果.     

贵州山区作物生产专家系统开发技术研究

本文通过对贵州山区复杂生态条件下农作物生产知识进行分析 ,提出“平台—框架—应用系统”的作物专家系统开发技术路线。其中对知识模型的建立、应用框架的开发设计和系统集成进行了详细的论述。其技术思想对在相应的生态条件下开发作物专家系统具有一定的借鉴意义     

荣昌猪相关性状分析方法

通过荣昌猪选育试验的数据资料,检证了计算机系统设计中的统计学分析方法的运行结果与完整性,并获得了荣昌猪选育性状间的相关系数、回归系数、通径系数及性状估测公式等多种统计结果。为系统设计中的其它模块运算分析打下了基础,也为荣昌猪的选育工作提供了许多有用的统计量。     

翻转犁限位块形状的反求分析与设计

以JD型液压翻转犁为模型机 ,运用反求工程技术 ,对其限深轮换位机构的限位块进行反求分析和研究 ,建立了其结构形状优化设计的数学模型 ,为零件的形状优化提供了一种新的思路和方法。同时将反求结果用于1LF— 335液压翻转犁 ,该犁已投入批量生产 ,限位块工作性能良好。     

人工水库旅游景点设计与环境风格定位

以包头市石门风景区为例,依托地域、历史和民族文化,探索如何使人工水库工程与自然环境和谐共处,并且寻找其在旅游和度假上的开发价值.具体讲述了此案例对大型人造工程的环境景观的理解与风格定位,以及风景区的旅游环境规划和景点设计.     

内河航道视觉航标的景观化设计初探

视觉航标是有目的建造的设施,它向船舶上经过培训的观察者传递信息以便助航。内河航道上的视觉航标不仅承担助航功能,其基本造型、外观形式及色彩等因子还承载着航道景观功能,与航道的驳岸、周边的其他景观要素一起表征特定航道流域的景观风貌。该研究通过分析航标的设计特点、设计影响因子,提出了内河航道视觉航标景观化设计处理的原则与方法。以期为今后视觉航标的设计提供参考。     

Parameter Design for the Power Train and Simulation of the Dynamic Performance of Elctrical Vehicle

The method and principle of the parameter design for the power train of EV is explored and discussed,then the parametersof EV. based on SC7101 are reasonably selected.The method of calculating the SOC of Lead_acid battery is provided and the relation among the electromotive force,the interior resistance, the polarized resistance and the SOC are analyzed. The capacity is compensated according to the relation between the capacity and the temperature, which is the basis on which the energy management system is designed and improved. The dynamic model which reflects the dynamic characteristics of the power train is established,then the dynamic performance of the EV based on SC7101 is simulated, and the factors that affect the continuous mileage of EV are analyzed,the measures to increase the continuous mileage are provided.The result shows that the analysis of the electric characteristics of battery and the dynamic model are correct,and the dynamic performance perfectly meets the need of the design target.     

An evaluation method of design ability usingmental workload assessment

By analyzing the relationship between design ability and design time, mental workload, and design effect, an evaluation method of design ability is proposed. As far as the factors involved in such method are concerned, mental workload is measured by NASATLX (national aeronautics and space administration task load index) scale, design time is acquired with a special program, and design effect is scored by expert. Then, the time spent on new design tasks based on the evaluated ability level is predicted by using support vector machines, which is then compared with real measured time. The result shows that the predicted time is well accorded with the real time, which indicates that the evaluation method of design ability is valid.