认真总结经验继续做好大坝安全定检工作

我国电力系统的水电站大坝，大多数为高坝大库，确保这些大坝的安全，事关国民经济的发展和社会稳定的大局。因此，加强水电站大坝安全管理工作，是摆在各级电力主管部门面前的一项重大社会责任。１９８５年大坝安全监察中心（以下简称“大坝中心”）成立后，依法行使大坝安全监察职能，在国家电力主管部门的直接领导和各大坝安全责任单位的支持下，做了大量开创性工作。水电站大坝安全定期检查就是其中的一项重要内容。首轮定检从１９８７年古田溪一级开始试点到１９９８年底为止，已圆满完成９６座水电站大坝的定检工作。通过首轮定检，对…     

多传感器目标识别的图像数据融合技术研究

军事和空间技术的要求促进了微光技术的发展。微光图像实时处理技术是夜技术今后发展的重要方向，本文针对微光图像与脉冲激光测距仪的数据信息实时融合与显示的方法及其实现进行了研究。给出了系统框图及工作原理，为实现探测识别、跟踪的实时性、智能化和微型化，从而为研制新一代战术侦察与火控系统提供了具体有效的技术基础。     

蒸汽压法测定导热油热分解温度的研究

根据克拉贝龙—克劳修斯方程，建立了国内外文献未见报道的测定导热油热分解温度的试验装置和试验方法，测定了大量国内外导热油的热分解温度，数据表明该法具有准确、简单、实用、省时、省力等优点     

Exclusion of BMP6 as a candidate gene for cleidocranial dysplasia

Cleidocranial dysplasia (CCD) is an autosomal dominant, generalized skeletal dysplasia in humans that has been mapped to the short arm of chromosome 6. We report linkage of a CCD mutation to 6p21 in a large family and exclude the bone morphogenetic protein 6 gene (BMP6) as a candidate for the disease by cytogenetic localization and genetic recombination. CCD was linked with a maximal two-point LOD score of 7.22 with marker D6S452 at theta = 0. One relative with a recombination between D6S451 and D6S459 and another individual with a recombination between D6S465 and CCD places the mutation within a 7 cM region between D6S451 and D6S465 at 6p21. A phage P1 genomic clone spanning most of the BMP6 gene hybridized to chromosome 6 in band region p23-p24 using FISH analysis, placing this gene cytogenetically more distal than the region of linkage for CCD. We derived a new polymorphic marker from this same P1 clone and found recombinations between the marker and CCD in this family. The results confirm the map position of CCD on 6p21, further refine the CCD genetic interval by identifying a recombination between D6S451 and D6S459, and exclude BMP6 as a candidate gene.     

Isolation of a genetic locus associated with metronidazole resistance in Helicobacter pylori

We examined the molecular mechanism of metronidazole resistance by constructing a lambda-Zap II phagemid expression library with genomic DNA from a metronidazole-resistance strain of Helicobacter pylori. Twenty-two clones were found to have elevated MTZ resistances in XLOLR strain of E. coli. Phagemids belonging to the twenty two clones were extracted and then retransformed into the XLOLR strain of E. coli. After MTZ selection, five clones could confer metronidazole resistance consistently. According to Southern hybridization and DNA sequencing, the five clones contained a same locus, recA. In addition, transforming the five clones into BL21 strain of E. coli produced a higher resistance to MTZ. Interestingly, electroporation of one of the five phagemid clones into two MTZ sensitive H. pylori yielded MTZ resistant strains. Comparing amino acid sequence in MTZ resistant with sensitive isolates revealed two point mutations at this locus. Above results suggest that mutation in recA may be associated with metronidazole resistance of H. pylori.     

云贵响水电站高水头主阀设备优化设计

水轮机进水阀门是响水电站关键设备之一，对提高机组运行安全可靠性和经济效益至关重要。在设计中，经过技术、经济论证，采用结构简单、操作方便和价格便宜、且有国内外经验可借鉴的高水头蝴蝶阀。     

G60S防窜剂在板深78-1井长封固段固井中的应用

大港油田板深78-1井是一口定向深探井,完钻井深4560m,套管下深4554.04m,井底静止温度为142℃,循环温度为115℃。固井水泥采用嘉华G级加35％硅粉,外加剂用G60S防窜剂和H88高温缓凝剂,固井采用双胶塞,固井时水泥浆平均密度为1.83g/cm~3。经CBL测井结果表明,水泥浆从井底返至井深2293m,封固段长2261m,全井封固优质段累计达1693m,优质率达74.9％。固井效果良好。     

强折射轴对称流场的干涉再现方法

利用光学方法测量气体状态参数的关键在于确定气体折射率场的变化。光线通过稳定的非均匀折射率场时发生偏折，并且在强折射对称场中会产生交叉，使得条纹位移量的判读困难。本文首先分析了光线在轴对称折射率场中的偏折效应，在此基础上，给出了一种利用成像透镜对强折射轴对称场中折射率的干涉再现方法。该方法与其它方法相比较能够精确地确定折射率ｎ（ｒ）的值。     

角状螺旋固体激光器热畸变自补偿特性分析

利用张量方法对角状螺旋光路固体激光器作了分析，证实其在ｘ、ｙ两方向对激光介质的热畸变有自补偿作用，且ｘ、ｙ两方向呈对称性．     

磷酸盐玻璃中稀土离子的发光浓度效应研究

磷酸盐玻璃中稀土离子的发光浓度效应研究王民权，马立新，樊先平（浙江大学材料科学与工程系３１００２７）（南京航空航天大学）ＳｔｕｄｙｏｎＣｏｎｃｅｎｔｒａｔｉｏｎＥｆｆｅｃｔｓｏｆＲａｒｅＥａｒｔｈＩｏｎｓｉｎＰｈｏｓｐｈａｔｅＧｌａｓｓｅｓ￥Ｗａｎｇ...