高光谱图像高维多尺度自回归有监督检测

给出一种有监督检测算法以检测高光谱图像中的区域目标. 为利用高光谱图像中的空间尺度维信息, 在高光谱图像多尺度观测不同相连节点之间建立高维多尺度自回归模型, 并利用四叉树节点间的多阶马尔可夫性和高维多尺度回归噪声先验概率密度与高维观测条件概率密度的等价性及其多元 t 分布特性, 构造出适用于检测高光谱图像中区域目标的空间多尺度自回归有监督检测算法. 理论分析及实验中的5种评价方法的结果均表明该检测器可有效检测出高光谱图像中的目标区域.     

The crystal and molecular structure of a valinomycin analogue cyclo[(D-Val-L-Lac-L-Ala-D-Hyi)2(D-Val-L-Lac-L-Val-D-Hyi)]. H2O(C50H82N6 O18.H2O)

The crystal and molecular structure of the valinomycin analogue, cyclo[(D-Val-L-Lac-L-Ala-D-Hyi)2(D-Val-L-Lac-L-Val-D-Hyi)] has been solved by x-ray direct methods using the "Shake and Bake" procedure. The crystals, grown from a mixture of octane/CH2Cl2, belong to space group P2(1) (Z = 4) with cell parameters a = 10.29, b = 32.08, c = 18.73 A, beta = 97.05 degrees, and contain two molecules per asymmetric unit. After anisotropic refinement the standard reliability factor was Rl = 0.058. The conformations of both independent molecules is similar to that observed for isoleucinomycin, cyclo[-(D-Ile-L-Lac-L-Ile-D-Hyi)3] [V. Z. Pletnev et al. (1980) Biopolymers, Vol. 19, pp. 1517-1534]. The structure has an asymmetric conformation stabilized by six intramolecular H bonds, five bonds being of the 4-->1 type and one bond being of the 5-->1 type. One water molecule is caged in the internal cavity of each cyclodepsipeptide. This conformation could represent an intermediate state between free and complexed forms of valinomycin.     

氢化锆中氢的散射律和散射矩阵研究

从氢化锆晶体散射律的角度出发，研究了氢化锆晶体散射的特殊机理。根据氢化锆晶体散射的声学模型和光学模型给出的频谱分布，用国际通用程序ＧＡＳＫＥＴ计算了氢化锆中氢的散射律。     

河南省内乡—淅川地区边缘成矿体系与成矿预测

河南内乡—淅川地区具有一完整的边缘成矿体系。应用边缘成矿理论,通过野外对该区控矿要素的实际 调研和室内对比分析,提出了豫西南内乡—淅川地区边缘成矿体系的新认识。一级成矿边缘为华北板块与扬子 板块边缘对接处(山阳—西峡断裂带两侧),控制了两个跨省大型成矿带的形成;二级成矿边缘为区域深大断裂 边缘,控制区域成矿带形成;三级成矿带边缘为岩体边缘、次级断裂带边缘和地层交界面等,控制矿田、矿床的形 成;四级成矿边缘为岩体边缘不同岩相分界面、不同岩性层间面和构造形态、产状变化处。不同边缘交叉、叠合 地段是成矿最有利地段。研究表明,边缘成矿体系的形成与地质异常事件密切相关,板块活动、区域构造、火山、 岩浆侵入、沉积环境演化是边缘成矿体系形成的主导因素。根据边缘成矿规律进行了成矿预测,指出主要找矿 方向和有利找矿区段(靶区)。     

用气相反应法制备纳米WO3气敏材料

材料的制备是研制半导体气敏传感器的关键环节.用气相反应法,以纯钨丝为原料,制备了WO3粉末,又以此WO3粉末为基材,制作了NO2气敏传感元件.在性能测试中发现,该元件对低浓度(10-10)NO2灵敏,灵敏度可达10倍左右,而且响应迅速,响应时间为1.5 s.文中从材料的微观结构入手,对材料的敏感机理作了分析.     

一种新场发射压力传感器阳极膜结构的模拟与测试

提出了场发射压力传感器阳极变形膜的双层膜结构.计算机模拟证明这种结构与已报道的单层膜相比具有大量程与高灵敏度的优点.对这种结构的形变特性进行了实验测试,考虑到测量误差与湿法刻蚀造成膜表面的不平整因素,测实结果与模拟结果较为相符.     

基于NEMS技术的硅基纳机电探针阵列器件研究

进行一种用于高密度存储的硅基纳机电探针阵列器件研究.并采用理论计算和有限元模拟相结合方法对器件进行了设计;使用先进的微纳加工工艺技术将压阻敏感器和电阻加热器集成到超薄悬臂梁-针尖结构纳机电探针阵列器件上,实现器件制作;随后,进行器件电热特性及其敏感特性测试,测试结果与模拟结果相吻合;借助于原子力学显微镜在聚合物有机薄膜上实现了数据写入,优化写入条件后,数据记录面密度达31.6 GB/in2.     

Effect of enduracin on the activity of a cholesterol ester transfer protein in blood plasma of people with hypercholesteremia

Dr. Ellen R. Wiebe's study of the use of methotrexate and misoprostol in combination for early termination of intrauterine pregnancy (see pages 165 to 170 of this issue) is the first Canadian study of the use of this drug combination for medical abortion. The authors compare Wiebe's findings with those of earlier studies on methotrexate and misoprostol, as well as with European findings on the use of mifepristone with prostaglandins. The authors argue that although the methotrexate-misoprostol combination appears to be reasonably safe for the woman, the failure rate and the teratogenicity of methotrexate and misoprosol give cause for concern. The authors conclude that medical abortions ought to be offered only where there is adequate access to laboratory and surgical facilities and where losses to follow-up are systematically minimized to reduce the potential for continued pregnancy resulting in congenital abnormality.     

A prospective, randomized controlled trial of inpatient versus outpatient continence programs in the treatment of urinary incontinence in the female

Adults enter computer learning situations with diverse interests and backgrounds. They learn best when they can select from a variety of learning modalities with the goal of completing a desired task. Helping adults learn how to undo computer errors and identify support persons can be just as important as successful completion of a task on the first attempt. By applying these principles of adult education to computer learning, educators can facilitate competence and self-direction in learners.