如何进行投资决策分析

本文阐述了可行性研究人员向投资者提供决策分析时应考虑的一些问题：科学决策准则；多方案比较；市场分析；价格分析和预测；项目基准收益率；资金筹措。     

纤维多孔陶瓷作为复合蓄热材料基体的可行性研究

混合烧结法与熔融浸渍法是目前复合蓄热材料的两种基本制备方法，自发浸渍法是无机盐／多孔基体复合蓄热材料较佳的制备工艺。结合自发浸渍工艺原理的分析，对蜂窝陶瓷、添加造孔剂制备的多孔陶瓷与纤维多孔陶瓷在孔隙率、孔结构及力学性能等方面进行了比较。纤维多孔陶瓷凶其高孔隙率（可达95%以上）、优良的连通孔结构及特殊的断裂力学性能，可用作复合蓄热材料基体。纤维多孔陶瓷用于复合蓄热材料基体可有效地解决普通多孔基体中相变材料含量低、熔融物易溢出及抗热震稳定性差等问题。     

微波诱导催化炭还原处理废气的研究

介绍了中国氮氧化物的污染现状和目前实际采用的治理技术,简单阐述了这些技术的利弊。综述了微波诱导催化炭还原技术处理废气中的氮氧化物的原理以及国内外在利用微波技术处理氮氧化物的研究现状及该技术存在的问题。     

SL-919型聚氨酯胶粘剂的合成、性能及应用

本文介绍了SL-919型聚氨酯胶粘剂的合成、性能及应用方面所做的工作。     

在线稽查装置用电信息采集系统的窃电分析--基于电力用户用电信息采集系统

在电网供电过程中,一些用户受利益的驱使,使用非法手段窃电,使得国家电能大量流失,给国家经济造成了严重的损失。因此,探究防窃电方法成为了电力科技领域研究的重点。介绍了新型防窃电在线稽查装置,概述了该装置的运行原理和实现方法,为在线准确判定用户是否有窃电行为提供了一定的依据。     

Graphics Processing Units and Open Computing Language for parallel computing

Graphics Processing Units (GPUs) have become increasingly powerful over the last decade. Programs taking advantage of this architecture can achieve large performance gains and almost all new solutions and initiatives in high performance computing are aimed in that direction. To write programs that can offload the computation onto the GPU and utilize its power, new technologies are needed. The recent introduction of Open Computing Language (OpenCL), a standard for cross-platform, parallel programming of modern processors, has made a step in the right direction. Code written with OpenCL can run on a wide variety of platforms, adapting to the underlying architecture. It is versatile yet easy to learn due to similarities with the C programming language. In this paper, we will review the current state of the art in the use of GPUs and OpenCL for parallel computations. We use an implementation of the n-body simulation to illustrate some important considerations in developing OpenCL programs.     

Analysis of geometric characteristics of GGBS particles and their influences on cement properties

This paper presents an investigation into the geometric characteristics of different ground granulated blast furnace slag (GGBS), including particle size distribution (PSD), shape and their influences on cement properties. Samples of GGBS with different PSDs are prepared using in three processing approaches, a ball mill, an airflow mill and a vibromill. The morphology of GGBS and the PSD is studied, respectively, with scanning electron microscope (SEM) and laser particle analyzer (LPA). The results indicate that the PSD of GGBS processed by an airflow mill is concentrated on a narrow range, whereas the size of GGBS made by a ball mill are distributed in a large range. The morphology of GGBS processed by a vibromill is mostly spherical and its surface is very smooth. The results also show that when GGBS has a similar surface area, the strengths of cement mortar, in which 50% cement is replaced by GGBS, are related to PSD of the GGBS. The early strength of sample containing GGBS processed by a ball mill is higher than that by an airflow mill, whereas the long-term strength of this mix is lower. When 0.05% ZS grinding assistant agent is added into the ball mill, the output of the ball mill increases by 18%, the fluidity of mortar containing GGBS is greatly improved and the fluidity ratio reaches to 106. Strengths of the mortars, consisting of 50% cement and 50% GGBS with and without grinding assistant agent, are similar.     

Single-ion conduction and lithium battery application for ionomeric cross-linking polymer

The single-Li⁺ conduction of the cross-linking poly [oligo (oxyethylene) methacrylate-co-lithium methacryloyl hexylsulfonate]s was studied, and an Li⁺ ionic transport number of 0.994 estimated from the isothermal transient ionic current (ITIC), in which an ion-blocking platinum electrode was used. The results show that Li⁺ -ionic conduction can be reasonably described by Vogel–Tammann–Fulcher (VTF) equation, suggesting that there is close correlation between ionic migration and segmental motion in these polymers. The battery composed of lithium/this copolymer film/polyaniline supplied a constant short circuit current (J_SC) of 45 μA/cm² and an open circuit potential (V_OC) of 3.6 V at 25°C. © 1993 John Wiley & Sons, Inc.     

薄荷中乌发组分的初步探索

从干燥的中草药中,通过有机溶剂煎煮,萃取和浓缩得粗提物,然后用硅胶柱作正相剃度洗脱,分离得到所需的乌发的有效成分。并通过比色皿法由L-酪氨酸与蘑菇酪氨酸酶的氧化激活率来检测所得粗提乌发组分的效果。