四苯基卟啉蒽醌化合物与钴(Ⅱ)配位反应动力学

用光度法研究了5-[p-(β-蒽醌酰亚胺)甲氧基]-10，15，20-对甲基四苯基卟啉(H2TPP)在DMF溶剂中与金属钴(Ⅱ)离子配位反应的动力学以及镉(Ⅱ)离子对该反应的催化作用，提出了反应机理，并研究了温度对反应动力学参数的影响，求得基元反应的活化参数△rHm^≠、△rSm^≠及平衡步的△rHm^θ、△rSm^θ．     

大型电站锅炉主蒸汽温度的模块化阶梯式动态矩阵控制

针对淮南平圩电厂#1锅炉主蒸汽温度难以自动调节的问题,在充分了解系统特性、综合考虑各个扰动因素后,作者引入10个影响因素,提出了采用模块化、阶梯式动态矩阵控制方案,成功地解决了该厂2008t/h锅炉主蒸汽温度难以自动调节的问题,使其控制指标达到540±3℃之内,优于国家标准540±4℃.这一实施方案能解决大惯性、大时延及多扰动系统控制问题,具有在线辨识、滚动优化和实时反馈等优点.     

辨析企业人才的"留"与"流"

论述了辨证认识与处理好人才的“留”与“流”的关系，指出了只有做好人才管理工作，慎重地考虑人才的留用，才能使企业长期、持续、健康、稳定地发展。     

类型γ射线能谱指纹的识别机理

放射源的辐射指纹能起到标识和鉴别放射性物体的作用.在涉及核弹头不可逆销毁过程的深度核裁军核查中,核弹头的辐射指纹对标识和鉴别裁减下来的核弹头将起到关键作用.预先研究辐射指纹的有关技术,如识别机理的研究,将有助于深度核裁军的核弹头核查技术发展.以实验室放射源为研究对象,探索了类型γ射线能谱指纹的同一性识别机理.类型γ射线指纹识别机理的研究,就是要找出一种合适的方法,以较高的置信度,描述两个正在进行比较的γ射线指纹是否为同一放射源的指纹.采用了谱形比较法,并用谱相似度概念来描述两个指纹的相似程度.在谱形比较思想的指导下,编制了放射源类型指纹识别软件,并通过放射源同一性的识别实验验证了软件的有效性,同时研究了谱相似度随统计涨落和测量条件,如时间、源强和本底等因素的变化情况.研究结果表明:1)用相似度概念来描述两个指纹的相似程度,回答两个待比较的γ射线能谱是否代表同一类型放射源,是切实可行的;2)该识别机理只具备识别放射源类型的能力,而对同一类型、差异甚微的放射源个体还不能识别 关键词： γ射线能谱指纹 辐射指纹 识别机理 核查技术     

Dynamic fractal unifying interaction confirmed with magnetospheric behavior and orbital data

The solar wind makes the magnetosphere to expand and contract as indicated by the expansions and contractions of the auroral oval due to balancing of the dynamic pressure of the ambient space plasma at inner and outer magnetic lines. This self‐similar magnetospheric behavior elucidates the controversial magnetic storm‐substorm relationship and reveals the 3D‐spiral structure of magnetic interaction. The found self‐similarly evolving structure of one seen as fundamental interaction suggests dynamic fractal unifying interaction that builds a firework universe having 3D‐spiral code. The unifying interaction is described with equation drawn in new fundamental dynamic fractal framework. The equation of unifying interaction converges to the inverse square laws and the principle of uncertainty at laboratory scales. The dynamic fractal fundamental framework is made of one 3D‐spirally‐faster‐inward contracting and expanding, oscillating, basic matter. It simply accounts for observed constant speed of light and for the creation of bright and dark bands on a screen behind a tiny slit. The dynamic fractal framework is quantitatively confirmed with the orbital data for the Milky Way Galaxy, the Sun, the Earth, and the triple asteroid system 87 Sylvia. Many testable predictions are also made. The presented new fundamental dynamic fractal framework allows qualitative and quantitative modeling and simplification. © 2007 Wiley Periodicals, Inc. Complexity 12: 61–76, 2007     

基于系统振动的啮合齿轮齿面上的相对滑动运动分析

以单级直齿圆柱齿轮传动为研究对象,建立了系统的数学模型.通过齿轮系统振动运动分析,论证了考虑系统振动时存在于啮合轮齿齿面间的相对滑动运动,在此基础上对比分析了考虑和不考虑系统振动时存在于啮合轮齿齿面间的相对滑动运动的特点.指出由于系统振动的原因,齿轮副的实际中心线不是固定不变的,而是以平面运动方式变化的,实际啮合点的轨迹(亦即啮合线)不是一条直线,而是一条曲线.当齿面磨损或胶合破坏始于齿高中部时,造成这种破坏的主要原因是齿轮系统的共振.     

Visual Basic中动态数组的应用

Visual Basic中 ,动态数组的使用非常灵活 ,其用途十分广泛 .在循环使用一个以上动态数组时 ,优势更明显 .通过编写构造素数表以及求多项式导数的通用函数过程 ,可充分显示动态数组在 Visual Basic编程中的重要性     

热轧圆钢外径的激光在线检测研讨

本文报导热轧圆钢激光在线检测外径的阶段性研究结果，给出仪器研制原理及光机结构设计同仪器精度关系的研讨．     

动态帧长ALOHA信令在集群移动通信中的应用

本文介绍了在集群动通信中，运用动态帧长ＡＬＯＨＡ信令技术解决信道共用中停产碰撞问题的原理，并具体介绍了ＭＰＴ－１３２７协议的接续原理，特点，信息格式及呼吊建立过程和举例，文中还对动态帧长的算法作了简介。     

Theoretical study of cyclization of 2′-hydroxychalcone

The isomerization mechanism of 2′(OH)chalcone (1) in flavanone (2) was studied. The calculations were performed with the semiempirical method AM1, using totally optimized molecular geometries. A 6-step mechanism including several equilibrium states was proposed. It was concluded that: (a) At the conformational equilibrium of 1 there could be 43.9% of s-cis conformer; (b) The acid dissociation of 1 trans-s-trans is considerable; (c) The E_E, ΔH_f and net charges show that the rotation of ring A of 1 and the formation of ring C of 2 occurs without greater impairments; (d) Although the keto structure is the most stable one, the enolate of 2 is present in the reaction medium; (e) The conversion of enol of 2 in the keto form would be the limiting step of the analyzed isomerization rate.