平面Ⅲ级机构运动分析的降级法和泰勒级数逼近法

本文提出平面Ⅲ级机构运动分析的两种方法──降级法和泰勒级数逼近法。上机实例计算表明，这两种方法是正确的，可行的，并对一般由Ⅲ级机构组成的多杆机构的运动分析具有通用性．     

PP_(333)对幼龄桃树早期生长的影响

本试验试材为三年生‘春蕾’桃树,在新梢生长旺盛期叶面喷施PP_(333)。结果表明:PP_(333)能够抑制新梢生长,控制树冠扩大,缩短节间长度,增加早期新梢萌发量。从而起到了化学修剪的效果。     

时间分辨多光谱技术研究

本文讨论了具有时间分辨的多光谱探测技术 ,并通过结合钛宝石锁模激光器、荧光显微、高重复频率皮秒扫描相机等技术 ,研制出一套基于皮秒同步扫描相机的五维双光子激发荧光多参数复合显微成像系统 ,实现了细胞层次上的五维测量 ,并可方便地实现多种功能成像 ,例如荧光强度、荧光寿命和荧光光谱成像     

水－甲醛－三聚甲醛三元系精馏过程的模拟计算

采用弛豫法对文题所述系统进行了模拟计算。结果表明，尽管三聚甲醛（ＴＯ）在该系统中相对挥发度较高，但受到甲醛、水浓度变化的制约，ＴＯ增浓缓慢，当理论塔板多于８块后，其增浓效果更不明显。     

中外合资经营企业最优折旧策略

我国于1980年制定了“中外合资经营企业所得税法”,为中外合资经营企业的所得税及各种折旧方法作出了明确的规定。根据此税法及折旧不计人应税所得额的原则,本文探求一种最优折旧策略,使中外合资企业应纳税收入扣除额的净现值为最大。为了提供这一成果,本文采用了惯用的三种折旧方法——直线忻旧法、余额递减折旧法及年数和折旧法,通过数学运算和最优化分析,认为由直线折旧法与年数和折旧法相组合的方法优于其它方法。这种折旧策略对国营企业也有较大参考意义。最后,本文给出了一个实例,以说明此方法的应用及其现实意义。     

顺丁烯二酸与二甲苯共沸脱水动力学

研究了顺丁烯二酸（顺酸）在二甲苯溶剂中共沸脱水生成顺丁烯二酸酐（顺酐）的反应过程。通过减小顺酸固体粒度及增加搅拌装置等手段，消除内外扩散的影响。在１２３～１４０℃温度范围内，测定了该脱水反应的速率。研究表明，该脱水反应为一级反应，且在不同温度区域表现出不同的活化能。     

Micromorphology and safety properties of meager and meager-lean coal for blast furnace injection

Four types of meager and meager-lean coal and one type of high-quality anthracite were selected based on the safety requirements for blast furnace coal injection and domestic coal quality to conduct microstructure and component analyses.The analyses of the organic and inorganic macerals and the chemical compositions of the selected coal samples indicate that the four types of meager and meager-lean coal have low volatilization,low ash content,and low sulfur content;these qualities are suitable for blast furnace injection.Grindability test was conducted on the four types of meager and meager-lean coal and the anthracite mixed coal samples.Results indicate that the mixture of meager and meager-lean coal and anthracite is beneficial to improve the grindability of pulverized coal.The explosive tests reveal that the selected coal samples are non-explosive or weakly explosive.When the proportion of meager and meager-lean coal is less than 40wt%,the mixed coal powder would not explode during the blowing process.The minimum ignition temperature test determines that the minimum ignition temperatures of the four types of meager and meager-lean coal and anthracite are 326,313,310,315,and 393°C,respectively.This study provides a guiding research idea for the safety of meager and meager-lean coal used in blast furnace injection.     

Five modified boundary scan adaptive test generation algorithms

1. INTRODUCTION In the process of applying boundary scan technologyto improve the testability of circuit board, the taskafter the boundary scan design for circuit board is togenerate test vectors for it, namely, the test generationalgorithm. Usually, according to the information usedin the test generation algorithm, the test generationalgorithm falls into three types: first, traditionaboundary scan test generation algorithm such asMCSA[1], WOA [2] and equal weight algorithm [3~5]they al…     

基于ARM的嵌入式Linux终端系统性能实时优化研究

传统嵌入式Linux终端系统性能优化方法通常忽略了硬件方面的优化,导致整体优化结果不佳。为此,提出一种基于ARM的嵌入式Linux终端系统优化方法。给出基于ARM的嵌入式Linux终端系统内存分配图,根据系统内存分配图,将嵌入式Linux终端系统内存分配问题转换成0-1背包问题,通过动态规划方法解决背包问题,实现嵌入式Linux终端系统内存优化。通过ARM硬件中断管理与数据处理实现Linux终端系统实时性优化,ARM利用高级中断控制器AIC的硬件中断定向功能和优先级控制功能对中断进行管理,数据处理采用主动丢弃策略对实时性问题进行处理,将一些无用或者不重要的数据删除。实验结果表明,将所提方法应用于嵌入式Linux终端系统实时性优化后,嵌入式Linux终端系统时延显著降低,内存分配更加高效稳定。