璧固美矣犹堪琢之--教育部高教司组编98版《大学语文》指瑕

《大学语文》中出现释义欠妥、注音谬误及技术性错误,表明现行教材在编纂中略嫌粗放,亟待去伪存真,精雕细琢,使其日臻完善。     

应用Delphi4的MIDAS构件组开发起重机零部件管理系统

Delphi自版本4就开始提供一组新的构件MIDAS,使用它,可以方便地开发具有三层体系结构的数据库应用程序。本文分析了MIDAS构件组的开发原理,并以起重机为例,论述了开发基于三层结构的起重机零部件管理系统的基本步骤,并详细讨论了开发中三层结构的实现过程。     

履带式推土机粘弹性悬挂机构的开发研究

对履带式推土机行走机构的振动特性进行测试 ,建立起推土机缓冲系统模型 ,经对模型特性参数对传递率影响的分析 ,确定出参数的合理值域。把阻尼材料诺模图曲线数字化 ,做到了计算机对诺模图动态曲线的自动查询 ,实现了阻尼缓冲结构的动态优化。掌握了阻尼缓冲结构的设计理论和方法 ,已应用于 2 4 2kW履带式推土机粘弹性悬挂机构的开发。     

基于多层前馈型神经元网络模型的摄像机定标算法

针对传统线性、非线性摄像机定标算法的鲁棒性,提出了基于多层前馈型神经元（MLFN）网络模型来替代传统精确的摄像机定标数学模型,MLFN网络模型作为层状网络可实现任意维复杂的输入／输出映射,对于无需计算摄像机构,外参数的应用场合,该模型提供了一种实用且有较好鲁棒性的摄像机定标算法,同时为了补偿摄影机非线性畸变,把图像按畸变程度分割成两个区域,分别建立各自基于MLFN网络的摄像机定标模型,实验表明,该方法有效补了畸变,并提高了模型精度,给出了基于MLFN网络模型摄像机定标算法实验,验证了该模型的有效性。     

古耀州瓷着色元素的中子活化分析

运用中子活化分析(NAA)技术,测定耀州瓷釉中29种元素的质量含量,从中选取24种着色元素．通过对比分析,最后确定铁是耀州瓷的着色主元素,证明了考古界“耀州瓷以铁为着色主元素”的说法．     

Studies on Wear and corrosion resistances of carbon nitride thin films on Ti alloy

0　IntroductionArtificialarthrosiseshavebeenwidelyusedintheoperatorsclinicalsurgeriesforthepatientswhosearthrosiseswerese riouslyseverelydamaged.Butmostofartificialarthrosisescanon lybeusedforabouttenyearslongduetotheseriousabrasion .Forthisreason ,theimprovementofthelongevityofartificialarthrosisbecomesanimportantsubjectofstudy .TheartificialarthrosisesbeingmadeupofTialloyTC4(Ti 6Al 4V)andthepolythenewithultrahighmolecularweighthavegreatpotentialitiesonim provinglongevitybecauseTC4canreac…     

高速网络芯片测试方法研究

针对网络芯片测试方法研究不多的现状,该文在描述测试概念和抽象测试结构的基础上,根据测试系统中控制观察点的位置,给出了5种网络芯片抽象测试方法,即:集中测试法,分布测试法,远程测试法,穿越测试法和回绕测试法。利用这些测试方法,对用于核心路由器高速接口卡上的OC-48cPOS(packetoverSONET)芯片进行了功能、互操作和性能测试,并分析了测试结果。测试实践表明,这些抽象测试方法能够满足网络芯片测试的需求。     

Coupling and feedback between iron and sulphur in air-sea exchange

Iron in surface seawater has been demonstrated to be the limiting nutrient factor for primary productivity in certain oceanic regions where other major nutrients are abundant[1—5]. The available Fe to the phytoplankton in seawater is related to the uptake of carbon dioxide through the ocean and, in turn, to the global greenhouse effect[6—11]. Recent reports showed that the available Fe in the seawater is closely correlative to nitrogen fixation in the ocean[12—17]. Understanding which Fe s…     

<Emphasis Type="Italic">In situ</Emphasis> generation and detection of methyl radical by voltammetry

The chemistry of free radicals is one of the advanced subjects of fundamental sciences such as biomedicine, environment protection, new energy sources and new material. The detection technique of free radicals is an essential tool for studying free radicals. Methyl radical is one of the representatives of alkyl radicals and the studies on it attract more attention. The current approaches to obtaining methyl radical are based on pulse radiolysis of organic substances that contain the methyl gro…