软x射线近贴显微技术

软x射线近贴显微技术不但可使活的生物样品成象,分辨率高于光学显微镜,而且人为的样品准备程序在该技术中都可避免。本文描述了用高功率激光打靶产生的等离子体作为软x射线源而进行的近贴显微研究,并得到了分辨率好于1μm的结果。     

300 MN水压机垫板组力学行为规律研究

针对巨型水压机多层垫板组力学行为的多维非线性特征,本文应用作者开发的多体接触有限元程序,分析了300MN水压机垫板组力学行为规律,揭示了垫板组加载方式为几何空间状态与力学行为的相关性,说明了垫板组异常变形机制,提出了垫板组设计和使用的几点准则。     

饲育条件下Semisulcospiens decipiens的生长

在饲育温度条件下研究了Ｓ．ｄｅｃｉｐｉｅｎｓ的生长和产仔数及与饲育水温的关系。结果表明水温在上升期和下降期，新生贝和稚贝的生长速度较快，产仔数也较多．成体贝在水温１１℃～２９℃时，都可产出新生贝，以１８℃～２４℃时产出较多．在高温饲育条件下，成体贝的生长速度缓慢。     

关中地区的贫水化探讨

关中地区水资源贫乏，供需矛盾尖锐，存在严重贫水化问题，这阻碍着陕西经济的进一步发展．本文主要论述了这一地区贫水化的表现，提出解决贫水化问题的措施和对策     

Cationic poly(methacryl oxyethyl trimethylammonium) and its poly(ethylene glycol)‐grafted analogue as capillary coating materials in electrophoresis

Cationic polyelectrolytes were synthesized and used as semipermanent coating materials for capillaries in electrophoresis. The polyelectrolytes used were a homopolymer of poly(methacryl oxyethyl trimethylammonium chloride) (PMOTAC) and its poly(ethylene glycol) (PEG)‐grafted analogue. Two PMOTAC polyelectrolytes, with molar masses of 85,000 and 300,000 g/mol, and PEG‐grafted PMOTAC with a molar mass of 280,000 g/mol were synthesized and then characterized by size exclusion chromatography (SEC) and nuclear magnetic resonance (NMR) spectroscopy. Attachment of the polyelectrolytes to the wall of the fused silica capillary for electrophoresis caused the electroosmotic flow (EOF) to reverse. The polyelectrolyte coatings were tested over the pH range 2–11 at different buffer ionic strengths, and the most stable and strongest anodic EOFs were obtained at acidic pH values with low ionic strength buffers. Between runs the capillary is merely rinsed for 2 or 3 min with the background electrolyte solution. With the PMOTAC coatings at pH values ≤5, the RSDs of the EOFs were less than 2.9% after 60 injections. The effects of the molar mass of the polycation and of PEGylation of PMOTAC on the interactions between the polycations and basic proteins were studied at acidic pH values. The differences in the effective electrophoretic mobilities, resolution values, and plate numbers of the proteins with the different coatings were due to the EOF, as demonstrated through calculations of reduced mobilities, relative resolution values, and relative plate numbers. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 2655–2663, 2007     

Boundary-Value Problem of Drainage in a Fresh Groundwater Fringe above Saline Groundwater

A multiparameter boundary-value problem of fresh infiltration water seepage in a drained fringe above quiescent saline water is solved in the direct statement and studied in detail.     

关于太原市节约用水及中水利用的思考

中水利用对解决太原市缺水问题有着现实的必要性和可行性.推进中水利用应通过制定完善的法律法规体系,建立科学合理的水价格体系,理顺城市水业管理关系,培育中水市场体系等方法来解决.     

宜宾热源公司热电厂锅炉补给水处理工艺改造

分析了宜宾热源公司热电厂锅炉给水处理工艺的问题，指出因为原采用二级钠离子软化工艺水质不达标，造成频繁爆管，严重影响生产的不良后果．介绍了技术改造措施及效果：在原工艺基础上引入复床，将给水硬度控制在2．0μmol／L以下，碱度、氯根及电导率电得到控制，系统运行将近一年，水质稳定，锅炉运行正常安全，不仅消除了以前的生产隐患，而且节约了大量运行成本．     

恢复坎儿井输水系统功在当代利在千秋

文章简述了坎儿井输水系统的优缺点，及在干旱地区农业发展中的重要作用。要恢复、发展坎儿井输水系统，全面认识到坎儿井输水系统在新疆干旱区绿洲农业发展中的重要意义。     

网上中文水利信息资源的利用

对网上中文水利信息资源进行了分析总结,以便为水利信息用户提供网上信息资源的检索查询作参考。