新安煤矿16煤导水裂隙带高度研究

结合新安煤矿开采技术和水文地质条件,以岩石力学实验资料为基础,分别采用"三下开采规程"法、类比法、经验公式法和数值模拟法对新安煤矿16煤开采导水裂隙带高度进行综合对比研究。计算结果表明:数值模拟法可对裂隙带发育高度直观显示,并和最终确定的导水裂隙带高度一致;综合确定新安煤矿16煤的最大导水裂隙带高度为30m,防水煤柱高度35.5m,为确定16煤合理开采上限提供理论依据。     

含茂金属的金属有机TCNQ电荷转移盐

本文对ＴＣＮＱ与含茂环或芳环的金属有机配合物形成的电荷转移盐的合成、分子结构、光谱、磁学性质和电导率进行了评述。     

三元Ti49.2Ni49.3Co1.5形状记忆合金的低频阻尼特性

用动态机械热分析仪在变频、变温、变振幅条件下，对三元Ti49.2Ni49.3Co1.5合金的低频阻尼特性进行了研究，结果表明：三元Ti49.2Ni49.3No1.5合金由于温度和应力的作用发生相变而导致不同的阻尼特性，马氏体相（M）、R相的阻尼高于母相（P），相变过程（多相共存）出现阻尼峰（极大值），同时伴随有对应的弹性模量峰（极小值）；频率和振幅对相变阻尼及马氏体相阻尼影响较大，对母相阻尼影响较小，频率和振幅越高，相变阻尼峰越不明显；合金在升温过程中出现二次相变（M→R→P），M→R的相变阻尼远远高于R→P的相变阻尼。     

简易家用起坐器的研发

现代家用起坐产品缺乏并昂贵的现状,利用人因工程学知识,设计了简易家用起坐器,产品为床垫式结构,通过开关控制步进电机启停,从而实现起坐运动。产品经济实用,安全舒适,有很高的实用价值。     

一种基于Java应用构件动态重定位模型

提高分布应用性能和各种资源利用率的关键途径是尽可能地减少处理机间的通信量和让处理机忙于有用的工作．在因特网环境下，现有提高分布应用性能和各种资源利用率的工作存在一定的不足，如不能在邻居局域网范围内进行负载平衡．提出了基于局域网簇和“通讯录”的应用构件动态重定位模型．在该模型中，一方面对局域网簇内负载进行平衡，另一方面针对构件远程调用决策重新定位构件或复制构件副本以提高分布应用的性能．另外，构件动态重定位模型必须满足构件迁移前后一致性，给出了一种基于通讯录的构件通信算法，解决了该一致性问题并且具有较高的效率．实验结果表明该模型是可行和有效的．     

碳纤维的丙烯酸电聚合涂层及其复合材料的界面

丙烯酸10%水溶液,于25℃下,经电引发后在碳纤维表面发生聚合反应。采用FT-IR、~(13)C-NMR、XPS、SME和元素分析等方法对所发生的电聚合反应和成为涂层的高聚物进行了表征和鉴定。结果表明:涂层/碳纤维界面粘合层中存在物理吸附和化学键合或端聚物。而涂层/基体界面层是化学键合。     

晶体二阶有效非线性系数在全卦限中的对称性

从分析二阶有效非线性系数公式入手，针对各类单轴、双轴晶体，讨论了其二阶有效非线性系数在其折射率主轴坐标系八个封限中的变化情况，给出了相应的对称性结果。为寻求晶体中的最佳相位匹配方向提供了理论依据。     

Preparation of Zn-doped TiO2 nanotubes electrode and its application in pentachlorophenol photoelectrocatalytic degradation

Zn-doped titanium oxide （TiO2） nanotubes electrode was prepared on a titanium plate by direct anodic oxidation and immersing method in sequence. Field emission scanning electron microscopy （FESEM） showed that the Zn-doped TiO2 nanotubes were well aligned and organized into high density uniform arrays with diameter ranging from 50 to 90 nm. The length and the thickness were about 200 and 15 nm respectively. TiO2 anatase phase was identified by X-ray diffraction （XRD）. X-ray photoelectronspectroscopy （XPS） indicated that Zn ions were mainly located on the surface of TiO2 nanotubes in form of ZnO clusters. Compared with TiO2 nanotubes electrode, about 20 nm red shift in the spectrum of UV-vis absorption was observed. The degradation of pentachlorophenol （PCP） in aqueous solution under the same condition （initial concentration of PCP： 20 mg/L; concentration of Na2SO4：0.01 mol/L and pH： 7.03） was carried out using Zn-doped TiO2 nanotubes electrode and TiO2 nanotubes electrode. The degradation rates of PCP using Zn-doped TiO2 nanotubes electrode were found to be twice and 5.8 times as high as that using TiO2 nanotubes electrode by UV radiation （400 μw/cm^2） and visible light radiation （4500 μw/cm^2）, respectively. 73.5% of PCP was removed using Zn-doped TiO2 nanotubes electrode against 45.5% removed using TiO2 nanotubes electrode in 120 min under UV radiation. While under visible light radiation, the degradation efficiency of PCP was 18.4% using Zn-doped TiO2 nanotubes electrode against 3.2% using TiO2 nanotubes electrode in 120 min. The optimum concentration of Zn doping was found to be 0.909%. The PCP degradation efficiencies of the 10 repeated experiments by Zn-doped TiO2 nanotubes electrode were rather stable with the deviation within 3.0%.     

Primary Sn-rich titianite in the Qitianling granite, Hunan Province, southern China: An important type of tin-bearing mineral and its implications for tin exploration

The Qitianling calc-alkaline granite in Hunan Province (South China) has attracted much attention since the discovery of the Furong super-large tin deposit. The present study provides new mineralogical data to address their implications for exploration of tin deposits. In the Taoxiwo granite in the southeastern part of the Qitianling granite body, Sn-rich titanite was identified as an important type of Sn-bearing mineral. The titanite commonly occurs with biotite as euhedral crystals, exhibiting typical envelope-like shape and sector-zoning texture. These indicate that the titanite most likely crystallized in the magmatic stage. Electron-microprobe analyses show that the titanite is enriched in tin up to 1.12 wt% SnO₂, with an average of 0.43 wt%. With the crystallization of the granite, primary minerals undertook hydrothermal alteration by magma-derived fluids. Subsequently, in the hydrothermal stage, the primary Sn-bearing titanite was altered (at least partially), but still preserved its typical envelope-shaped outline. Micro-scale cassiterite is a representative product of such alteration; other secondary minerals include fluorite, ilmenite, Sn-bearing rutile and quartz. Therefore, the titanite, commonly present in the calcalkaline granites, can be treated as an important Sn-carrying mineral in the Qitianling granite, reflecting the primary magmatic environment with tin enrichment. The hydrothermal alteration of the primary titanite and subsequent crystallization of cassiterite recorded a process of leaching and accumulation of tin in magmatic-hydrothermal evolution of the Sn-bearing granite. Thus, this titanite has important implications for tin exploration. Supported by National Natural Science Foundation of China (Grant Nos. 40730423 and 40221301) and Project of China Geological Survey (Grant No. 1212010632100)     

一种利用域名系统支持主机移动的路由协议

当网络主机改变网络接入点时。传统的TEP／IP协议无法正常运作。这是由于IP地址的双重作用(既是主机的名也指明主机当前的网络位置)引起的，支持主机移动的网络协议SHMUD(Supporting Host Mobility Using DNS)用域名作为主机名。保留主机IP地址指示其当前网络位置的作用，解决了这一问题，SHMUD以域名服务系统作为它的位置目录，在每个移动主机可能访问的网络中安装移动代理，当移动主机从一个网络移动到另一个网络。并通过DHCP服务器获得了当地网络的一个IP地址后。向它的归属代理(Home Agent)发送登记请求，归属代理根据该移动主机的请求通知DNS服务器。DNS服务器就更新该移动主机的域名—地址映射。这样网络中其它主机利用域名与该移动主机通信时就可以直接将IP报发往该移动主机的当前IP地址了，在移动主机改变网络接入点的过程中，可能与其它主机正在进行通信。为保证通信不被中断(称为平滑越区)。SHMUD提出了一种新的机制以实现主机的平滑越区。此外，SHMUD还提供必要的安全措施使各个移动代理和DNS服务器不受网络攻击。最后，给出了SHMUD的原型系统和性能分析，与其它支持主机移动的路由方案如Mobile-IP相比，SHMUD实现了路径优化、资源的分布式管理、平滑越区以及身份验证等。此外，它只需要在移动主机可能访问的网络中安装移动代理，并在移动主机上安装必要的软件即可运行，不必进行大规模的软件升级，因此较适于在因特网中推广。