AS／400的2000年问题的探讨

２０００年问题是ＩＴ行业要迫切解决的问题。分析了ＡＳ／４００的２０００年问题，并且给出了一个可行的ＡＳ／４００ ２０００年问题实施方案。     

多窗口下绘图效率的提高与应用

通过实例 ,讨论了交叉矩形检验法 ,此法主要用在Windows绘图软件中 ,用于提高针对于同一数据文件的多窗口下其余窗口中的图形显示效率。该方法具有实现简单 ,实用性强的特点。在实际绘图软件的编写过程和实践中得到证明 ,能够大幅度的提高多窗口下图形元素的显示效率。     

Windows应用程序中屏幕存储和恢复的方法

本文介绍在Windows程序中将屏幕图形以位图形式拷贝到内存设备背景中，然后在需要的时候再将内存设备背景中的位图像拷贝到屏幕上的方法。     

Plasma-assisted co-evaporation of β-indium sulfide thin films

This paper describes the development of plasma-assisted co-evaporation (PACE) for the formation of β-In₂S₃ thin films. Indium was supplied by conventional thermal evaporation, while the chalcogen gas precursor (H₂S) was activated using an inductively coupled plasma (ICP) source. Using a combination of optical emission spectroscopy and mass spectrometry it was shown that the ICP effectively dissociated H₂S, producing atomic sulfur. Transport modeling was used to quantify the flux distributions of the co-evaporated metal and the plasma-generated species impinging the substrate. Model predictions were validated by measurements of deposition rate and film properties. Substantial improvements in both materials utilization and substrate temperature reduction were realized with respect to conventional co-evaporation. β-In₂S₃ was formed as low as 100 °C and it was observed that quality was a strong function of S/In ratio. The grain size decreased and the optical band gap increased as the substrate temperature was reduced.     

基于TMS320C25音频处理系统的C语言编程

这篇文章着重讨论了Ｃ语言程序在以ＴＭＳ３２０Ｃ２５为基础的处理系统中的开发和应用。详细介绍了从Ｃ源程序到适用于Ｃ２５格式的程序的开发过程，同时讨论了在开发过程中可能遇到的问题及其解决办法。同时，文章对两种编程语言在ＴＭＳ３２０Ｃ２５系统中的应用前景作了简单的比较和预测。     

Heat flux profile upon building facade with side walls due to window ejected fire plume: An experimental investigation and global correlation

This paper investigates the heat flux profile upon building facade with side wall constraints due to ejected fire plumes from a window of an under-ventilated compartment fire. A reduced-scale model (1:8), consisting of a cubic fire compartment with a facade wall attached and two side walls located symmetrically at both sides of the window is developed. The window dimensions and the side wall distances are changed in experiments, representing different ventilations and constraints on fire plume entrainment. Five heat flux gauges are employed in measurement of vertical heat flux profile upon the facade wall. Results show that with the decrease in separation distance of side walls, the heat flux increases for small windows where dimensionless excess heat release rate ${\dot{Q}}_{ex}^{⁎}\ge 1.3$ (“(half) axisymmetric fire” regime), meanwhile shows weak dependency on side wall separation distance for large windows where ${\dot{Q}}_{ex}^{⁎}<1.3$ (“wall fire” regime). A new global formula is proposed to characterize the vertical profile of heat flux based on Lee’s model without side walls as further modified by a parameter K in relation to the separation distance of side walls and characteristic length scales of the window. Experimental data for different windows and side wall separation distances are well collapsed by the proposed formula.     

Impact of window blinds on daylight-linked dimming and automatic on/off lighting controls

This paper presents the field-measured performance of two commercial photocontrolled lighting systems, continuous dimming and automatic on/off, as a function of various configurations of manual and photocontrolled automatic venetian blinds. The performance indicators considered were the space illumination and the electric lighting consumption as a function of blind slat angle and retraction area. The results showed that under clear sky and without blinds both lighting control systems reduced the lighting energy consumption on average by 50–60% when compared to lights fully on from 6 AM to 6 PM. These savings, however, dropped by 5–45% for the dimming system, and by 5–80% for the automatic on/off system with the introduction of various static window blind configurations. The savings in lighting energy were more significant when the lighting control systems were used with photocontrolled blinds. This was due to the capability of the blinds to adjust their position automatically in direct response to the variable daylight levels.     

建设全媒体科普视窗创新科普手段

全媒体、3G网络、LED显示屏等新技术的兴起给科学技术传播工作带来了全新的机遇和挑战。本文以新型科普设施"全媒体科普视窗"的研发、应用和推广为主线,探讨了新形势下依靠科技手段创新科普传播方式的意义与途径,并阐述了以全媒体科普视窗为基础的科普服务体系的建设,以及需要注意的问题和相应的解决方法。     

Full scale experimental study of single-sided ventilation: Analysis of stack and wind effects

Natural ventilation can contribute to the reduction of the air conditioning demand and to the improvement of thermal comfort in buildings. In this paper, the flow field and the air change rate generated by a simple configuration of natural ventilation, namely single-sided ventilation, are examined experimentally. The experiments are realized in a full scale building exposed to outdoor conditions, using several measurement techniques. The main features of the flow generated by stack and wind effect are examined for different outdoor conditions (temperature difference, wind speed and direction). Finally, measured air change rates are compared to those calculated by existing correlations in order to analyze their applicability to the experimental configuration. Results show that the wind generates turbulence diffusion at the opening, counteracting the stack effect. Moreover, in the case of windward opening, there is an additional effect, namely the effect of mixing layer, which tends to increase the airflow rate. Existing correlations give reasonably good results in the case of windward opening, while in the case of leeward opening they overestimate the airflow rate.