氯化钐与缩二脲固体配合物的合成及性质

本试验在无水乙醇介质中用六水合氯化钐与缩二脲反应制得了一种新的配合物,经分析测试得知,该配合物可能的结构式为:〔Sm(BuH_2)_4〕Cl_3,并证实了缩二脲是通过羰基氧原子与S_m~3+配位,且Cl~-未参与配位作用.     

STATISTICAL ANALYSIS OF YARN APPEARANCE IN SINGLE PLATED WORK KNITTED ON LARGE DIAMETER CIRCULAR WEFT KNITTING MACHINE

In this paper the significance analysis has been made of the factors influencing the yarn appearing of single plated weft-knit fabrics knitted on large diameter machine by a mathematical statistical method. By means of orthogonal test and variance analysis, it is known that the feeding tension is the significant factor influencing the yarn appearance and the ground yarn tension should be larger than the face yarn tension. Through comparison, it is also known that the drawing off force should be regulated suitably, the carrier should be near the first closed needle, and the sinker should be out late slightly.     

一种微处理机LQG自校正调节器

本文给出了一种一步最优 LQG 自校正调节器在 TP805单板机上的实现—STRI—01,详细介绍了 STRI—01的硬件和软件构成。本文还讨论了LQG 自校正器在运算字长较短的单板机上实现时的一些问题。最后给出了模拟实验结果,结果表明这种微处理机 LQG 自校正调节是可行的.     

Adaptive Excitation Control with L2 Disturbance Attenuation for Multi-Machine Power Systems

Generator excitation control plays an important role in improving the dynamic performance and stability of power systems. This paper is concerned with nonlinear decentralized adaptive excitation control for multi-machine power systems. Based on a recursive design method, an adaptive excitation control law with L2 disturbance attenuation is constructed. Furthermore, it is verified that the proposed control scheme possesses the property of decentralization and the robustness in the sense of L2-gain. As a consequence, transient stability of a multi-machine power system is guaranteed, regardless of system parameters variation and faults.     

多个数字仪表字符串区域的定位和识别研究

根据待识别图像中多个仪表的特点,运用边缘检测技术、数学形态学方法、连通域标记法等来定位出多个仪表待识别字符串区域,并运用BP神经网络来识别.经过试验,能准确定位出各个仪表字符串区域,其识别率也达到了95%.     

THE EFFECT OF RUN-IN VALUE ON DIMENSIONAL AND PHYSICAL PROPERTIES OF RASCHEL WARP KNITTED FABRICS

After run-in analysis of Raschel warp knitting,the dry and wet relaxation treatments of twelvetwo-bar warp knitted fabrics having six different knitting tightnesses were made,and some physi-cal properties of these fabrics which had been finished were tested.On the basis of these experi-ments,the effect of run-in value on dimensional properties and the relationships between run-invalue and physical properties are discussed and analysed.     

带微机系统的硬支承动平衡机

介绍了在工业用硬支承动平衡机中利用计算机代替传统的电气箱作为测量和解算装置的方法。通过对振动信号整周期采样提高测量精度．运用时域中正、余弦相关技术对离散采样数据进行数字化处理，获得动平衡信号中同频量准确的幅、相信息。为保证解算精度，文中采用一种新方法对硬支承动平衡机进行标定。所研制的样机具有令人满意的平衡效果。     

EGARCH(1,1)模型对上证指数与成交金额波动性的实证研究

以2010年3月31日-2014年10月28日的上证指数与其成交金额的日数据为样本,对其进行Granger因果检验,采用ARCH族模型,对上证指数与成交金额的波动关系进行了非线性研究,并对EGARCH(1,1)模型运用于成交金额对上证指数日收益率的影响进行了检验和预测.     

考虑上游信号控制的公交停靠站车辆延误模型

针对公交停靠站运行效率缺少评价方法的问题,以时空轨迹图描述公交车辆在停靠站的到达、服务及驶离过程,在考虑上游交通信号配时影响的情况下,建立公交车辆延误与到达率、服务时间的数学关系模型,并通过实际调查数据验证模型的有效性.结果表明在不同条件下模型计算结果与实测值的相对误差为9.98%,能够准确反映公交停靠站的运行机理,对于评价公交停靠站的服务水平和分析相关影响因素提供了重要依据.     

创伤性膈疝21例临床诊治分析

目的 探讨创伤性膈疝的诊断治疗方法及经验教训.方法 对1992年至2008年间吉林中西医结合医院收治的2l例创伤性膈疝患者进行回顾性分析.结果 2l例中18例治愈;l例死于复合伤过重;4例延迟诊治,其中2例死亡.结论 医生应提高对膈疝的认识,一经确诊应及时手术.