"奖优罚劣"的动态多指标灰色关联度模型研究

针对动态多指标系统决策特点 ,利用灰色关联分析方法提出了一种新的“奖优罚劣”的动态多指标决策模型。该模型不仅对指标进行初始化处理时使用了“奖优罚劣”原则 ,而且通过构造相关矩阵 ,利用特征根、特征向量的性质 ,构造最优指标体系 ,并由此确定最优指标体系中各指标的权重。通过计算决策对象与理想矩阵、负理想矩阵的关联度 ,进而得到决策对象的排序结果。模型中充分考虑了指标的成长特性 ,将其整个系统的成长特性进行比较 ,作为关联度的一部分。在经济决策的实际问题中应用该模型 ,取得较好的效果     

Supergene mobility of noble metal elements in black rock series

In order to discuss the supergene mobility of noble metal elements in black rock series, measurements have been conducted with ICP-MS method for the contents of Ru, Rh, Pd, Ir, Pt, Au and Ag in the primary jordisite-rich black shale ore, in the supergene leached jordisite-rich black shale ore, in the pyrite-rich black shale ore and in the water of pit, well and stream of the mining area near Zhongnan Village, Zunyi District of Guizhou Province. The temperature, pH, electric conductivity, dissolved oxygen of the water were also measured. The pit water is acidic with high electrical conductivity and low dissolved oxygen. The total content of platinum group elements in the primary pyrite-rich black shale ore is only 1/13 of that in the primary jordisite-rich black shale ore. The Ag content in the former is only a half of that in the latter while the Au contents in the two kinds of ores are almost the same. Being leached under supergene condition, the contents of most of the noble metal elements except Au in the jordisite-rich black shale ore greatly decrease; the leaching rates of Rh, Pd, Pt, the total platinum group elements and Ag reach as high as 66.72%～74.79%, revealing that under supergene condition, platinum group elements and Ag can migrate along with water; the ratios of Ag/Au, Pd/Ru, Pt/Ir and(Pt+Pd)/(Ru+Rh+Ir) are remarkably decreased, displaying that Pt and Pd relative to Ru, Rh and Ir, Ag relative to Au bear more active mobility. The noble metal elements in the black rock series near Zhongnan Village might be mobilized and migrate under the procession of "cold water" rich in [SO4]2- with pH value being about 2.4 at a temperature below 50 ℃.     

Phylogenetic position of Schnabelia, a genus endemic to China： Evidence from sequences of cpDNA matK gene and nrDNA ITS regions

The chloroplast gene matK and the internal transcribed spacers (ITS) of the nuclear ribosomal DNA from Schnabelia, a genus endemic to China, and 6 genera of Verbenaceae and 13 genera of Lamiaceae were sequenced. The phylogenetic signal and validity outgroups were measured and evaluated by means of the relatively apparent synapomorphy analysis (RASA). Independent and combined phylogenetic analyses for the matK and ITS sequences were performed using the maximum parsimony (MP), neighbor-joining (NJ) and maximum likelihood (ML) methods, indicating that Schnabelia oligophylla and Caryopteris terniflora form a sister-group relationship. The Caryopteris complex is not shown to be a monophyly because Trichostema, C. paniculata and C. forrestii are paraphyletic to the clade containing the remaining members of the complex. A monophyly of Ajugoideae proposed by Cantino et al., including 8 genera in this study, is strongly supported and the closest relatives of Schnabelia are in the Ajugoideae (Lamiaceae), especially near Caryopteris terniflora. The polygenetic analyses also showed that the genera of Lamiaceae and Verbenaceae sampled in this tudy are phylogenetically mixed and the genus Avicennia is distant to other genera of Verbenaceae. RASA and combined analysis can be used as effective approaches to determining the relationships among phylogenetically complex groups.     

基于多电视台的两种无源雷达成像算法

基于外辐射源的无源雷达成像是当前新体制雷达的研究热点,给出了利用多个电视台作为外辐射源的直接二维快速傅里叶变换成像算法和极坐标成像算法。建立了多基地无源雷达成像模型,通过理论推导得到目标散射函数和雷达接收信号之间的傅里叶变换对的关系。选取15个电视台信号作为外辐射源进行了仿真实验,分析和比较了两种算法的性能,证实了算法的可行性。     

一种新的基于混合策略的动态组密钥管理方案

针对大型动态组通信,提出一种基于Iolus LKH SKDC混合策略的组密钥管理方案。该方案中全局组控制器通过密钥树来管理各个子组控制器,每个子组内采用改进的LKH SKDC方案管理子组成员;子组管理器根据成员ID值,利用单向散列函数计算成员所在路径上各节点密钥值。该方案具有分组管理和集中管理的优点以及良好的可伸缩性,它使LKH方案中的单点失效问题限制在子组范围内,不会对全局产生影响。理论分析和数值结果表明,该方案中子组管理器的密钥存储和动态更新开销大大减少,且用户在加入和退出子组时不会随机产生更新密钥,具有较好的综合性能。     

社会中介组织法律地位探析

公共行政理论的发展，使社会中介组织成为与国家行政一同行使公共管理职能的社会公行政的承担者，其作为国家和社会、个人之间的中介，承担了越来越多的原应由政府部门履行的公共服务职能，同时，它代表其组织成员的利益，加强与政府的沟通、交流与互动，并在相当程度上制约政府权力，具有特殊的法律地位。这种特殊的法律地位不仅体现在其独立性上，更可以从其地位的双重性上凸现出来。     

矿井井筒提升容器活塞风效应分析及计算

矿井提升容器在井筒中占据了部分井筒空间,升降运动时,产生活塞作用效应,提升容器周围的流场和压力场均发生变化,产生动态局部阻力.根据流体力学理论,分析了罐笼在井筒内升降过程中空气的速度变化情况,采用相对坐标法推导了在井筒风速影响下罐笼顺风、逆风和相会时的活塞风速数学计算模型.研究结果表明,井筒提升容器活塞效应的影响因素主要有提升容器的外形尺寸、井筒内的机械通风风速和阻塞比等.研究结论为研究由于矿井井筒提升容器活塞作用效应产生动态局部阻力提供了理论依据.图2,参11.     

一类误差不独立的变量含误差模型

对一类不独立变量含误差模型进行了探讨,建立了相应的模型,用极大似然方法给出了参数的估计;考虑了此模型的实例应用,并从相对偏差上将独立变量含误差模型与不独立变量含误差模型的结果进行比较,揭示了不独立EIV模型的先进性与较好的预测精度.     

加压泵供暖对其他热用户水力干扰的敏感性分析

通过对供热管网的理论分析,推导出水力失调后管网作用压差的计算公式。该公式以相对流量比和相对水力失调度为特征参数。通过实例计算分析,得出加压泵供热用户干扰其他热用户水力工况的因素。加压泵热用户水力失调是导致其他用户水力工况、热力工况恶化的根本原因;在水力失调度相同的条件下,加压泵供热用户影响其他热用户水力工况的严重程度是不同的,它与管网各用户和加压泵热用户的相对流量比大小有关,加压泵热用户相对水力失调度的大小有关,加压泵热用户和其他热用户的相对位置以及管网资用压差的大小等有关。     

蛋白质三维空间统一坐标系的建立

目的构建蛋白质三维结构的统一坐标系。方法利用蛋白质原子的质量作为权重,根据每个原子的位置信息求出蛋白质的质心,以此作为统一坐标系的坐标原点;再利用蛋白质位置坐标的二阶矩构造的矩阵求出蛋白质主成分的坐标向量,作为蛋白质三维坐标的基轴。结果编程实现了蛋白质统一坐标系的建立。结论该方法有效可行,为后续的蛋白质结构研究奠定基础。