基于模糊匹配的平面连杆机构反求设计研究

对平面连杆机构曲线进行了分析,提出了用一组特征参数来描述连杆曲线,建立了连杆曲线图谱库,并将模糊论应用于连杆机构的曲线匹配,从而获取所求的机构参数.最后给出了应用实例,证实了该方法的可行性与有效性.     

近终形薄带连铸工艺技术比较

近终形薄带连铸是钢铁工业简化工序，节能降耗，降低成本最具有竞争能力的一项重大新工艺技术，本文报导了世界各先进工业国近年来开展研究的最新成果，分析比较了诸多机型的优缺点，并提出了突破工艺技术的技术关键和建议。     

Nonlinear black-box modeling in system identification: a unified overview

A nonlinear black-box structure for a dynamical system is a model structure that is prepared to describe virtually any nonlinear dynamics. There has been considerable recent interest in this area, with structures based on neural networks, radial basis networks, wavelet networks and hinging hyperplanes, as well as wavelet-transform-based methods and models based on fuzzy sets and fuzzy rules. This paper describes all these approaches in a common framework, from a user's perspective. It focuses on what are the common features in the different approaches, the choices that have to be made and what considerations are relevant for a successful system-identification application of these techniques. It is pointed out that the nonlinear structures can be seen as a concatenation of a mapping form observed data to a regression vector and a nonlinear mapping from the regressor space to the output space. These mappings are discussed separately. The latter mapping is usually formed as a basis function expansion. The basis functions are typically formed from one simple scalar function, which is modified in terms of scale and location. The expansion from the scalar argument to the regressor space is achieved by a radial- or a ridge-type approach. Basic techniques for estimating the parameters in the structures are criterion minimization, as well as two-step procedures, where first the relevant basis functions are determined, using data, and then a linear least-squares step to determine the coordinates of the function approximation. A particular problem is to deal with the large number of potentially necessary parameters. This is handled by making the number of ‘used’ parameters considerably less than the number of ‘offered’ parameters, by regularization, shrinking, pruning or regressor selection.     

圆柱形螺旋弹簧的简捷计算

将圆柱形螺旋弹簧设计中的部分常用公式组合成一组仅与弹簧指数Ｃ有关的公式，并将Ｃ＝４～１４代入计算而获得一套参数表，由此，可提高圆柱形螺旋弹簧的设计效率。     

时变多变量系统辨识的一种方法

本文提出时变多变量系统辨识的一种新方法，并分析了算法的收敛性和稳定性。仿真例子表明所提出算法是有效的。     

衡山客运索道工程鞍座的设计

对衡山索道工程中双承载,双牵引鞍座在上、下站房及线路上的配置和主要技术参数、结构进行了较详细的叙述与分析。     

坐标测量机结构热特性参数的估计

本文提出了一种通过热位移时间序列分析对坐标测量机结构热特性参数进行估计的计算机辅助实验方法。     

DB590钢焊接冷裂纹敏感性的研究

超低碳贝氏体钢是具有高强度高韧性的新型钢种，它的合金元素含量少，含碳量又低，具有较好的焊接性能。采用插销试验研究了ＤＢ５９０钢焊接冷裂纹敏感性，同时用扫描电镜分析该钢插销试样的冷裂纹断口形貌。试验表明该钢具有优良的抗冷裂性能。     

针尖轮廓飞象扫描检测方法研究

分析了目前我国几种针尖轮廓检测方法、特点和存在问题。提出了一种针尖飞象自动检验方法，其原理是：被检测的针尖和探测器不动，利用转镜系统扫描针尖，产生针尖各部的时序象（飞象），这些依次出现的象受到探测器检测，即可获得反映针尖轮廓的一串直径信息。文中还对飞象扫描法的误差进行了分析和讨论。     

20keV～17MeV中子能谱测量

基于质子反冲方法，建立了一套宽能区，高效率的中子谱仪系统，分别用三支充不同气压氢和甲烷的球形正经计数管和一个有机闪烁探没器分段测量２０ｋｅＶ～１７ＭｅＶ的中子能谱，为了去除γ射线本底，对两种探测器分别采用了两种不同的脉冲形状别技术，谱仪直接测量的是中子在探测器中产生的反冲质脉冲幅度谱，通过解决矩阵方程的方法得到中子谱，解谱中所用的各个探测器的中子响应矩阵均蒙特－卡洛方法计算得到，谱仪在全能区的中子