当前公共图书馆读者服务工作发展思路探析

针对当前的时代特征和发展形势,结合广州市越秀区图书馆、苏州图书馆等国内公共图书馆近年来的工作发展,探究了公共图书馆通过环境气氛的营造、关怀弱势人群、创新读者活动、拓展服务内容等途径开创读者服务工作新局面的思路.     

轴流压缩系统振动模型分支的进一步研究

用微分方程定理论和分支理论的方法，讨论了轴流压缩系统的振动模型，证明了周期解和Ｈｏｍｏｃｌｉｎｉｃ轨道的存在性。分析了当某些参数变化的动力学行，结果为预测压缩系统振动的增长和衰减提供了重要参数设计。     

热交换实验中量热器热损耗的研究

对热交换实验中量热器尺寸结构进行分析研究 ,结果表明实验中量热器的最小热损耗只与其设计尺寸有关 ,即量热器的容积一定时 ,最小热损耗只与容器的高度有关而与其它实验值无关     

三尖杉总生物碱纯化工艺条件的研究

研究高三尖杉酯碱的纯化工艺，通过正交实验获得最佳纯化方案。通过单因素实验筛选最佳大孔树脂，并对纯化有显著影响的因素进行正交实验，获得最佳纯化方案。选取NRA树脂可以达到最佳纯化目的。选用NRA树脂进行生物碱纯化是可行的，大孔树脂在确定的因素下可以达到最佳纯化作用。     

干旱区内陆河流域产业结构效益分析——以黑河流域中游张掖市为例

产业结构与区域资源、环境之间存在着强烈的互动关系,以黑河流域中游张掖市为例,将水资源作为产业结构变化的内在驱动力,从经济效益、资源效率、资源供需、环境效益等方面出发对西北干旱区内陆河流域的产业结构效益进行了分析.根据研究区现状,提出了产业结构调整方案.     

平面阵列电磁导弹辐射器

给出了面电流平面阵列产生电磁导弹的条件,并对阵列辐射特性进行了分析。结果表明,该辐射一方面可以实现空间能量合成,大大提高单个脉冲的能量（峰值功率）,另一方面还具有良好的波束扫描特性。     

Anomalously high δ D and micro-scale hydrogen isotope heterogeneities in the mantle: Ion microprobe analysis of am-iboles from peridotite xenoliths at Nushan, eastern China

Hydrogen isotopic compositions of four amphibole grains from three pieces of lherzolite xenoliths in Cenozoic basanites of Nushan, eastern China have been analyzed by ion microprobe. δ D values of all analyzed points range from ?94‰ to +46‰, some of which are much higher than the highest δ D (+8‰) reported previously for mantle materials. The heterogeneities of D/H ratios within single grains have been observed, the variation of δ D is up to 80‰ on the scale of less than 400 ?m. No correlation between hydrogen isotopic ratios and hydrogen contents can be found, implying that the scatter of δ D values could not result from a late shallow process such as hydrogen loss or hydrothermal alterations and should be considered as inherited from the source at depth. Chemical compositions of Nushan amphiboles are very homogeneous, excluding the fact that the scatter of δ D values could arise from variable fractionation factors between a single fluid source and minerals. Therefore, metasomatic fluids responsible for the formation of Nushan amphiboles should be heterogeneous and result in the observed large variable and anomalously high δ D values of amphiboles. We suggested that such metasomatic fluids could be related to magma degassing in the mantle source. Based on the D-H diffusion data and the scale of hydrogen isotope heterogeneities, it was inferred that the mantle metasomatism took place soon before the eruption of host magma.     

利用X射线衍射仪评价防膨剂效果的实验方法

以水化膨胀能力最强的钠蒙脱石为研究对象,利用X′Pert Pro粉晶X射线衍射仪测试蒙脱石（001）晶面间距的原理,探索性地建立了使用X射线衍射仪直接、快速评价防膨剂防膨效果的方法和实验流程。系统总结了钠蒙脱石在去离子水、有机防膨剂、无机防膨剂中的（001）晶面间距变化情况。研究表明,蒙脱石（001）晶面间距的变化能够直观的反应防膨剂的防膨效果。并且采取了先抑后膨、先膨后抑的方法对防膨剂的稳定性、持续性进行了评价,拓宽了评价防膨剂的性能参数     

松塔水电站坝址区右岸绕坝渗漏分析

介绍了松塔水电站坝址区工程水文地质条件,对右岸古河道中松散沉积物、右岸基岩绕坝渗漏、右坝肩Ⅲ级阶地松散层的渗漏量进行了计算,得到了各渗漏量数据,为设计施工提出了防渗建议.