非理想阵列的信号波达方向和多普勒频率估计

在均匀线阵存在误差的情况下 ,提出了一种信号波达方向和多普勒频率的估计方法。此方法在空间域 ,不仅考虑了阵元幅相误差 ,而且考虑了阵元位置误差 ,使包括幅相误差和位置误差在内的误差矩阵达到Frobe nius范数的最小值。在时间域考虑了测量噪声 ,使得多普勒频率估计的似然概率达到最大。仿真结果表明了此算法的有效性。     

Developing the methodology of TSI: From the oblique use of methods to creative design

During the last 13 years, a dialogue has been conducted in the Critical Systems literature on the subject of choice betwen methods. However, in the late 1980s and early 1990s, researchers went in two separate directions. One direction involved an exploration of the “creative design of methods.” This is when the problem situation is understood in terms of a series of systemically interrelated research questions, each of which might need to be addressed using a different method, or part of a method. A synthesis is generated that allows each individual research question to be addressed as part of a whole system of questions. The other research direction involved the development of “Total Systems Intervention” (TSI), a meta-methodology that, amongst other things, encourages the creative exploration of the problem situation prior to the choice of methods. One of the latest innovations in TSI is a theory of the “oblique” use of methods. This is the use of methods for purposes other than those they were originally designed for. However, it is argued here that all the case studies that have been subject to an “oblique” interpretation can be better explained if they are seen as examples of the creative design of methods. We can therefore bring together the two strands of research that have hitherto been pursued separately in the Critical Systems literature. it is suggested that TSI can be enhanced by an understanding of the creative design of methods because the latter allows us to explain the purposive, flexible, and responsive way in which TSI is most successfully used in practice.     

光导池吸光度表达式的推导与计算

在窄矩形横截面入射光束被平凸透镜会聚后，其入射光线全部沿直线型光导池的子午面反射行进的情况下，推导出光导池吸光度表达式．按此式用计算机进行数值计算并作图，发现吸光度Ａ与待测样品浓度和光导池的长度均成很理想的线性关系．     

全面质量管理在军队院校教育的可行性分析

从管理思想，管理模式和管理文化对全面质量管理与军队院校管理进行了比较．讨论分析了将全面质量管理引入军队院校管理的可行性。     

初始排污权分配的优化模型

总量控制目标的实现与排污权交易政策的顺利展开,首先要解决的一个关键问题是初始排污权的合理分配.在给定排污总量上限的前提下,从分配时兼顾经济最优和公平性出发,同时考虑各地经济、环境、社会发展等综合因素构建了初始排污权分配的极大极小模型,分析了解存在的KKT条件,讨论了模型的解法.此外,该模型考虑到了效用函数不可微的情况,并且能够根据政府的偏好对社会效用和公平性进行权衡.     

黑荆树皮中缩合单宁的提取

采用微波法、超声波法和高压蒸煮法从黑荆树皮中提取缩合单宁,探索了它们的最佳提取工艺条件,并对这些提取方法进行了比较.实验发现微波法是提取缩合单宁的最佳方法.用IR、UV、TG-DTA分析和XRD分析对微波法在最佳条件下提取的缩合单宁进行了表征.     

H2CO分子高温配分函数的理论研究

在20-6 000 K温度范围内,计算了非对称陀螺分子H2CO的总配分函数,其中,转动配分函数采用WATSON的刚性转子模型,振动配分函数采用谐振子近似.20-6 000 K的温度范围被划分为5个区间段,计算的配分函数在这5个温度区间分别被拟合到一个温度T的四阶多项式,从而在每个区间均得到5个拟合系数.由这些拟合系数就可以快速、准确的获得分子在所研究温度范围内任意温度的总配分函数.     

分光光度法测定川产乌头属植物总生物碱的含量

根据二帖类生物碱和酸性染料溴甲酚绿在酸性缓冲液中形成的络合物能被氯仿提取,并且提取液在415 nm处具有吸收值的原理,运用酸性染料比色法测定了四川境内乌头属植物总生物碱的含量.乌头碱的标准曲线范围是8.8-52.8μg/mL(r=0.999 87,n=6),其平均加样回收率为99.548%.该方法灵敏度高、简便、准确快速.     

超声波提取扁蓄总黄酮及测定

目的:从扁蓄中提取总黄酮并测定其含量.方法:选择乙醇为溶剂,用超声波技术从扁蓄中提取黄酮类物质,并对所提取的黄酮类物质进行验证,用分光光度法测定含量.结果:测得样品中总黄酮的平均含量为1.88%,平均回收率为100.95%.结论:运用超声波法从扁蓄中可以提取出黄酮类物质,加快提取速度,提高提取效率.