生物组织中光敏剂浓度的非侵入式测量

用反射式分光光度计测量生物样品表面背散射光的变化能够调定作品内光敏剂浓度，本文把光子迁移模型理论用于该方法．测量灵敏度与已有的扩散理论的结果比较表明，光子迁移模型理论可用于光敏剂浓度的确定．     

退卷积过程中的低能尾修正

本文详述了康普顿轮廓测量退卷积处理过程中,关于低能端谱形畸变(即低能尾)的修正的思路和具体方法     

内置式共轭凸轮开口机构分析与设计

本文讨论了内置式共轭凸轮开口机构的运动特性,并给出了共轭凸轮实际廓线的精确解析设计方法。     

滚刀齿形铲磨原理的研究及其应用

通过论证阿基米德螺旋面不可径向铲磨，引出“螺纹铲削面和圆柱性螺旋面都 是不可径向铲磨曲面” 的重要概念，从而阐明了滚刀齿形铲磨时其齿侧面必然发生 畸变的根本原因，指出了滚刀齿形铲磨原理的本质。 应用铲磨原理，文中提出一种计算铲磨砂轮廓形的新方法；提出一种能使齿轮 滚刀齿侧面１／２齿长上齿形都保持ＡＡ级精度的变Ｋ值铲磨新工艺；此外，还提出一 种金刚石铲磨砂轮修形的共轭拟合新方法。     

利用谱线的多普勒展宽测定等离子体离子温度

本文论述了利用研制的谱线线形快速扫描仪测定HT-6B托卡马克等离子体离子温度的原理和方法。通过测定OV2781线的多普勒宽度,得到的离子温度约为40eV。     

The Ror receptor tyrosine kinase family

Receptor tyrosine kinases (RTKs) participate in numerous developmental decisions. Ror RTKs are a family of orphan receptors that are related to muscle specific kinase (MuSK) and Trk neurotrophin receptors. MuSK assembles acetylcholine receptors at the neuromuscular junction [1, 2], and Trk receptors function in the developing nervous system (reviewed in [3-5]). Rors have been identified in nematodes, insects and mammals. Recent studies have begun to shed light on Ror function during development. In most species, Rors are expressed in many tissue types during development. Analyses of mutants that are defective in the single nematode Ror demonstrate a role in cell migration and in orienting cell polarity. Mice lacking one of the two Ror gene products display defects in bone and heart formation. Similarly, two different human bone development disorders, dominant brachydactyly B and recessive Robinow syndrome, result from mutations in one of the human Ror genes. Received 17 April 2001; received after revision 2 July 2001; accepted 4 July 2001     

Interaction of fluid dynamic factors in the migration and accumulation of natural gas

The migration of fluid petroleum gas, described as fluid potential, depends only on gravity, fluid pressure controlled by depression and capillary force during tectonically stable period; but on tectonic stress during the tectonically active period with severe compression. This method is applied in the Junggar Basin, showing that the migration of Jurassic gas during Cretaceous and Eocene and the migration of Permian gas from Jurassic till the present are determined by capillary force and fluid pressure (including overpressure) which is controlled by depression; the migration of Jurassic gas from Eocene till the present and the migration of Permian gas during Triassic are controlled by tectonic stress.     

SQL Server到Oracle的数据迁移方法

分析比较SQL Server和O racle的数据结构,介绍从SQL Server到O racle数据迁移的四种方法,通过实例给出使用O racle M igrate W orkbench工具将数据从SQL Server迁移到O racle的步骤和问题分析。     

城乡人口迁移与集聚的规模效应研究

分析了城乡人口迁移类型和动力机制,论述了城市集聚规模效应的一般理论,提出了城乡人口迁移与集聚规模效应的评价体系,并从3个方面揭示了特定区域内城乡人口迁移与集聚规模效应的动态变化。     

包兰铁路沙坡头段防护体系近地面流场特征

基于地形和流场实测，研究了包兰铁路沙坡头段铁路防护体系近地面流场沿NNW-SSE方向的变化．结果表明，由于地形变化以及人工植被和草方格的存在，防护带内等风速线沿风向呈逐渐变疏和抬高的趋势，各高度的风速总体上呈递减趋势，风速放大率为负；沙丘迎风坡风速放大率为正，流动沙丘迎风坡风速放大率高于固定沙丘迎风坡．沙丘背风坡2．5m高度内风速放大率总体为负．防护带内的固定沙丘背风坡气流通体减速，各高度的风速放大率全部为负，平均为一1．48％／m．防护带内地表空气动力学特征发生变化，其中沙丘迎风坡地表风速廓线接近于对数率；人工植被带地表空气动力学粗糙度显著高于流沙区．