输电钢管塔杆的挠度计算

以薄壁杆件理论为基础 ,推导出输电钢管塔杆在复杂荷载作用下的挠度实用计算方法     

Reactivity of Redox-Active Guests Trapped Inside Molecular Capsules

Inclusion of guests inside molecular capsules may have pronounced effects on their chemical reactivity. This article provides a quick summary of research on the electrochemical reactivity of encapsulated redox-active guests. A brief account of the results obtained with simple hosts, such as cyclodextrins and cucurbiturils, starts the article. However, these hosts can only provide partial encapsulation. Most of the article is devoted to the results obtained by the authors’ group on the inclusion of ferrocene, cobaltocenium, and tetrathiafulvalene in molecular capsules formed by cavitand-type ligands, which give rise to supramolecular assemblies that provide full encapsulation. In general terms, trapping of redox-active centers inside molecular capsules leads to a substantial attenuation of their electrochemical kinetics, which results in electrochemically silent properties in extreme cases. However, the magnitude of this kinetic attenuation cannot be rationalized by simple criteria based on the overall size of the supramolecular assembly.     

Dimeric Resorcin[4]arene Capsules in the Solid State

Supramolecular chemistry research is focused on the study of weak non-covalent intermolecular — that is, supramolecular — interactions as the driving force in self-assembly and molecular recognition. Dimeric resorcin[4]arenes capsules have been a focus of our research for the last 15 years. This review describes the solid state complexation studies of unsubstituted phenolic resorcin[4]arenes and pyrogall[4]arenes towards the formation of dimeric capsules and assemblies using ionic and neutral species as guest molecules and templates. The multitude of different crystal structures obtained during these studies demonstrates the versatile nature of resorcin[4]arenes and pyrogall[4]arenes (2-hydroxy-resorcin[4]arenes) as supramolecular hosts in crystal engineering.     

冰蓄冷平板堆积床动态蓄冷特性理论研究

建立了描述冰蓄冷平板堆积床动态蓄冷特性的数理模型 ,并进行了数值计算。利用计算结果分析蓄冷剂过冷度、载冷剂流量对蓄冷性能的影响 ,从而为设计和优化冰蓄冷堆积床动态蓄冷性能奠定了基础。     

风水理念在园林设计中的应用

如今园林设计要综合考虑很多方面，风水是其中一个重要因素，关乎园林规划的合理性，甚至会涉及到吉凶问题，应当引起重视，并加强相关理论研究。本文先对风水理论及其基本原则做了简单介绍，然后从选址立基、景观设计、植物配置三方面分析了风水理念的实际应用。     

Development of Fission Gas Pressure Measurement Technique in the JMTR

To measure the gas pressure in fuel pins during irradiation, a null-balance type pressure sensor embodying bellows and a self-regulating apparatus was devised. An innovation applied to the device was the method of sealing with alumina plug the end of the mineral-insulated cable constituting the lead wire for conveying the signals from the pressure sensor. After verifying by out-of-pile test that the gas pressure could be measured up to 70kg/cm²G, with error within ±2.4%, an irradiation capsule was prepared in which a fuel pin containing U0₂-pellets and the pressure sensor were accommodated, and it was irradiated during three cycles of JMTR operation. The pressure sensor and the controller worked satisfactorily, the gas pressure being recorded through the three cycles of reactor operation. The applicability of this technique to practical measurements of gas pressure in fuel pins was thus established.     

Controlled Growth of Carbon Spheres Through the Mg-Reduction Route

Hollow spheres, hollow capsules and solid spheres of carbon were selectively synthesized by Mg-reduction of hexachlorobutadiene at appropriate reaction conditions. X-ray powder diffraction and Raman spectra reveal that the as-prepared materials have a well-ordered structure. A possible formation mechanism has been proposed.