Very Singular Solutions for Thin Film Equations with Absorption

The large-time behavior of weak nonnegative and sign changing solutions of the fourth-order thin film equation (TFE-4) with absorption where    n  ∈ (0, 3)   and the absorption exponent  p  belongs to the  subcritical  range is studied. First, the standard free-boundary problem with zero-height, zero contact angle, and zero-flux conditions at the interface and bounded compactly supported initial data is considered. Very singular similarity solutions (VSSs) have the form Here  f  solves the quasi-linear degenerate elliptic equation that becomes an ODE for    N  = 1   or in the radial setting in      . By a combination of analytical, asymptotic, and numerical methods, existence of various branches of similarity profiles  f  parameterized by  p  is established. Secondly, changing sign VSSs of the Cauchy problem are described.
This study is motivated by the detailed VSS results for the second-order porous medium equation with absorption   ( u  ≥ 0)  which have been known since the 1980s.     

A molecular simulation to investigate the possibility of electro-osmosis in non-ionic solutions with uniform electric fields

Recent literature, including many standard text and reference books, implies directly or indirectly that electro-osmosis (a phenomenon of significance in both the life and physical sciences) cannot take place in non-ionic solutions under applied uniform electric fields, but a molecular dynamic method shows that it does take place in such systems.     

The structure of pure tertiary butanol

The technique of second-order difference neutron scattering with hydrogen/deuterium isotopic substitution has been used to measure the intermolecular structural correlations in pure liquid tertiary butanol. The newly developed technique of empirical potential structure refinement has been used to perform a detailed structural analysis of the resulting partial distribution functions, providing a means by which a full set of interatomic partial distribution functions consistent with the experimental data can be extracted. A comparison with our experimental results is made for a Monte Carlo model produced using fixed potentials as in earlier simulations of this alcohol system, and for the model which results from our procedure. The results suggest that the extent of intermolecular hydrogen bonding, although significant, is less dominant than generally accepted.     

有限空间大气环境控制技术的研究

本文根据设计和使用经验,从剖析有限空间污染物的来源出发,探讨有限空间大气环境控制及其控制的方法,提出空气净化与再生的实施途径。     

空调系统污染分析研究

从化学和微生物的角度,分析了空调系统的污染起因,并综合分析了现有应用于空调系统中的净化技术,提出了研发健康空调的新思路。     

低温等离子体去除室内气态污染物的发展现状

本文介绍了室内气态污染物的来源和特点,阐明了等离子体的概念、存在状态以及分类,列举了低温等离子体的制备方法、部分化学反应的机理以及在去除室内空气污染物方面国内已取得的成果,并提出了今后需要进一步研究的问题。     

军团病菌-在喷泉中的传播和控制

本文分析了喷泉所引起的军团病菌的繁殖、散发和传播途径,通过喷泉现场的实测和分析,运用最佳投资效益分析方法,说明选择合理的喷泉水系统的水处理方式和运行管理,可以实现减少军团病危险的环境效益和降低喷泉水系统处理费用的经济效益。     

压阻式力敏硅传感器的结构剖析

剖析了各种压阻式力敏硅传感器的结构,介绍了其工作原理和测试方法并,对力敏硅传感器结构的优劣作出分析,为合理地选择、应用力敏硅传感器提供了依据。     

面向二十一工嵌入式系统综述

本文根据应用领域,对计算机分类提出了嵌入式计算机和通用计算机的新定义,总结了嵌入式系统工业及其开发的特点,概括了嵌入式处理器的发展及现状。实时多任务操作系统（RTOS）已成为嵌入式系统的热点,本文对RTOS及其与嵌入式开发的关系进行了详细讨论,提出了当前中国嵌入式系统应用行业面临的困惑和挑战以及建立嵌入式应用产业化的设想。     

新型升压式DC/DC变换器人LT1930

介绍了一种新型升压式DC/DC变换器：T1930及其应用电路。