汽车悬架主要性能参数的匹配研究

通过对汽车悬架结构的比较,对悬架静挠度和动挠度的匹配和车身侧倾中心高度与悬架侧倾角刚度在车轮的分配问题进行分析,利用生产试验的方法,总结了车辆运动特性要求下的悬架设计规则,为确定汽车悬架系统主要性能参数的设计和初始值提供了依据,进而合理地匹配确定其主要性能指标。     

装载机发动机与液力变矩器功率匹配优化

装载机发动机与液力变矩器之间的匹配对各自性能的发挥及整机牵引特性均有重要的影响。在拟合装载机发动机与液力变矩器有关特性曲线的基础上,以装载机的动力性为目标,建立发动机与液力变矩器匹配的优化模型,优化装载机发动机与液力变矩器的功率匹配,给出了算例并分析了优化结果。     

对低产林改良先造后抚的探讨

为改造生长率低、产量低、质量低、结构单一、生态系统脆弱的低产林,对先造后抚的营林措施进行了论述,提出先造后抚是改造低产林的重要手段。     

OPTIMIZATION OF BIPARTITE JOINS WITH GRAPH THGORY

An optimization approach for multi-relational joins based on the matching concept in graph theory is introduced. The basic idea lies in constructing a join graph from an expression of N-relation query, and seeking for a maximun matching with minimun total weight. The algorithm for bipartition(X, Y) is proposed in this paper.     

Load dynamic matching of supply and demand side based on the utilization of urban sewage heat energy

Flowing dynamic characteristics and its temperature dynamic characteristics of a three-level sewage pipe network in Chongqing were analyzed. A mall's building whole year load was simulated. In the adverse condition of wastewater flow, the market construction peak discharge heat was compared with the sewage heat load, the balance between the most adverse flow and the building demand was found. Explored supply and demand matching method between urban sewage and city building load in flow adverse condition to take full advantage of the urban sewage cold and hot resources. the composite system was adeptcd to make up the most unfavorable flow time of sewage average heat load and the construction load difference; it also puts forward principle of load sharing and control strategy aimed at compound system.     

Developing a Recognition System of Gun-code

Intelligent recognition system of gun code is designed , which achieves online recognition of gun code. We applied video camera to get image, and some special technique in this deformed character recognition. As well, we applied dynamic template matching to get a better result.     

Study on Computer 3D-Reconstruction Algorithm of the Contour Points Matching Interpolation for Serial Cross Images

A computer 3D-reconstruction algorithm was proposed for serial cross images,which is called contour points matching interpolation algorithm. The intermediate contours betweentwo neighbouring contours are preduced by contour points matching interpolation to form 3D-shapeof the reconstructed object. This algorithm is simple and can be easily implemented. Its advantagesare fast speed and strong adaptability for medical serial cross images 3D-reconstruction. Experi-ments show that the results are satisfactory.     

水头可调薄壁堰式渠道流量智能测控系统优化试验研究

采用巴赞堰流公式计算流量的水头可调薄壁堰式渠道流量智能测控系统通过渠道流量量测与控制试验,验证了其精准的测流功能和智能控制技术的可行性。为进一步提高该测控系统运行的效率和稳定性,减少运行能耗,对矩形薄壁堰堰流公式进行水力试验研究,通过分析堰上水头和流量关系,拟合出矩形薄壁堰流量计算公式。通过向该拟合公式引入修正系数λ=0.848,将测控系统测得的堰上水头数据值代入该拟合公式求得的流量值与电磁流量计测得流量值的差值的平均值为-0.004L/s,标准差为0.119,线性相关系数R2=0.989 1。该拟合公式相对于巴赞堰流公式形式简单、参数较少、运算简便,同时也满足节水灌溉对精准测流的要求,更适用于水头可调薄壁堰式渠道流量智能测控系统,对于在灌区推广和使用该测控系统具有重要的意义。     

模板法自动提取遥感图像耕地变化信息的研究

该文在多时相遥感图像中采用主成份差异法提取耕地变化信息，研究的关键在于差值前如何进行图像匹配、如何自动提取变化信息以及差值后如何确定变化阈值。在逐像元判断是否变化时，根据计算机视觉的数据处理思想提出一种采用(2n+1)×(2n+1)判断模板进行判断的方法，这种方法可以大幅度地改善单像元判断的效果。经试验，提取耕地变化信息的准确程度达85％以上，可以替代人工判读的工作。