Effect of the incomplete accommodation of the heterogeneous recombination energy on heat fluxes to a quartz surface

Taking both the heterogeneous catalytic processes, including the surface formation of particles with excited internal degrees of freedom, and the processes of multicomponent diffusion and heat transfer in the MESOX apparatus fully into account makes it possible to obtain a recombination coefficient and an accommodation coefficient of the oxygen-atoms-on-quartz recombination energy which are in good agreement with the experimental data. The heterogeneous catalysis model constructed can be used effectively for predicting the heat fluxes to the surface of reentry vehicles on their entry into the Earth’s atmosphere.     

放射源应用现状及管理的几点建议

分析了青岛市四方区放射源应用现状,指出了目前放射源管理工作中存在的实际问题,提出了今后放射源管理工作的具体思路和建议。     

浅析不作为犯罪的行为性和作为义务来源

行为是刑法的基础,作为与不作为是犯罪的两种基本形式,不作为的特殊性以及作为义务的主要来源的确定,是认定不作为行为罪与非罪的关键,本文拟就这两个问题作一探讨。     

用网络拓扑分析含受控源电路的一种系统方法

通过３个实例分析，阐明用网络拓扑分析含受控源电路的一种系统方法。     

秸秆气化燃气的净化及提高燃烧热值的研究

介绍一种新型湿式净化秸秆气化燃气的方法及基本原理 ,并讨论分析了其对秸秆燃气热值的影响 .     

关于理想气体任意准静态直线过程的最高温度点与吸放热转折点

讨论理想气体任意准静态直线过程吸热放热问题时，关键是如何确定过程中吸放热转折点的位置．阐述了最高温度点与吸放热转折点并不重合的原因，并给出了确定最高温度点和吸放热转折点的方法．     

数字图书馆信息资源组织浅探

简述了数字图书馆的含义，数字图书馆信息资源组织中要遵循的选择性、标准化、多雏性和安全性原则及信息资源的获取方式。     

Boiling heat transfer characteristics of nanofluids in a flat heat pipe evaporator with micro-grooved heating surface

An experimental study was performed to understand the nucleate boiling heat transfer of water–CuO nanoparticles suspension (nanofluids) at different operating pressures and different nanoparticle mass concentrations. The experimental apparatus is a miniature flat heat pipe (MFHP) with micro-grooved heat transfer surface of its evaporator. The experimental results indicate that the operating pressure has great influence on the nucleate boiling characteristics in the MFHP evaporator. The heat transfer coefficient and the critical heat flux (CHF) of nanofluids increase greatly with decreasing pressure as compared with those of water. The heat transfer coefficient and the CHF of nanofluids can increase about 25% and 50%, respectively, at atmospheric pressure whereas about 100% and 150%, respectively, at the pressure of 7.4 kPa. Nanoparticle mass concentration also has significant influence on the boiling heat transfer and the CHF of nanofluids. The heat transfer coefficient and the CHF increase slowly with the increase of the nanoparticle mass concentration at low concentration conditions. However, when the nanoparticle mass concentration is over 1.0 wt%, the CHF enhancement is close to a constant number and the heat transfer coefficient deteriorates. There exists an optimum mass concentration for nanofluids which corresponds to the maximum heat transfer enhancement and this optimum mass concentration is 1.0 wt% at all test pressures. The experiment confirmed that the boiling heat transfer characteristics of the MFHP evaporator can evidently be strengthened by using water/CuO nanofluids.     

Thermochemically induced binding of methyl orange to polycations containing primary amine groups

The thermochemical transformation of electrostatically formed complexes of methyl orange (MO) with polycations containing primary amine groups such as ammonium salts afforded new polymers with a high concentration of covalently bound 4‐N,N‐dimethylaminoazobenzene groups in the side chain. Poly(allylamine hydrochloride) and poly(β‐aminoethylene acrylamide hydrochloride) were employed as support polycations for MO. The transformation of sulfonate–ammonium ion pairs into sulfonamide bonds, via heating at an elevated temperature, was supported by the polymer properties before and after the thermal treatment. The polymer structure changes were monitored with elemental analysis, Fourier transform infrared, ¹H NMR, and ultraviolet–visible absorption spectroscopy, and thermogravimetric analysis. The spacer length between the backbone and azobenzene structures used as side chains strongly influenced the polymer properties before and after the heat‐induced reaction. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 5898–5908, 2006     

太原市东山热电厂和调峰热源厂双热源并网设计

根据太原市集中供热总体规划,确定在东山新建二台64MW的调峰热源厂。针对供热系统并网的特殊情况和地形条件,通过对水压图和可行性进行理论分析,提出了在热电厂供水管网上增设加压泵的技术措施。使双热源并网运行技术可行、安全可靠、高效节能。