裂解C_5馏份热二聚制双环戊二烯

采用分段管式反应器进行裂解Ｃ５馏份热二聚反应的研究。通过工艺条件试验，考查了Ｃ５原料中环戊二烯（ＣＰＤ）浓度、各段反应温度、停留时间等对ＣＰＤ转化率、双环戊二烯（ＤＣＰＤ）收率及选择性的影响。以试验数据为依据，建立了描述热二聚反应的数学模型，并对模型中若干参数进行了回归。应用数学模型对该过程的工艺条件进行优化。     

结合长输管道特点 做好HSE体系建立工作

建立HSE管理体系的核心是进行危害识别与风险评估。结合长输管道的特点,针对评估结果制定相应的管理方案、应急预案、运行控制文件、作业指导书;并对过程加以系统化控制。     

动态Cr,Tm,Ho：YAG激光器的实验研究

本文报道Ｑ开关Ｃｒ，Ｔｍ，Ｈｏ：ＹＡＧ激光器的实验研究，研究了Ｃｒ、Ｔｍ、Ｈｏ：ＹＡＧ激光器的调Ｑ工作的一系列特性，并分析了多脉冲产生的机制，获得了单脉冲能量６０ｍＪ的２．１μｍ的稳定调Ｑ激光输出，通过倍频途径测得了茯倍频光的光脉冲半宽度３５ｎｓ。     

自分散法低温烧成莫来石制品的研究

对用自分散法形莫来石和用此法低温烧结制成莫来石制品进行了研究，结果表明：在１３００℃的条件下，能制得性能优良的高纯莫来石制品。     

超磁致伸缩材料Tb_（0．27）Fe_（2－x）的超声学研究

用超声脉冲回波重迭法测量了超磁致伸缩材料Ｔｂ＿（０．２７）Ｄｙ＿（０．７３）Ｆｅ＿（２－ｘ）系列样品在不同磁场下的超声波速度，给出了该系列样品的弹性常数随磁场的变化情况，并对实验结果作了初步的解释和探讨。     

滦河下游河流健康评价研究

针对河流健康评价中诸多评价方法在指标权重确定方面存在困难的问题,应用改进主成分分析评价方法,实现河流健康等级评价。该方法从原始数据标准化处理方法上进行分析,用新的数据标准化方法代替传统的数据标准化方法,克服了原始数据部分信息丢失的问题,用主成分贡献率作为评价权重,克服了主观赋权的人为干扰,使评价结果更加客观真实。以滦河下游唐山地区8个河段为计算实例,得到所研究区段河流健康状况均为亚健康状况,其中玉田、丰润、滦县等区段的健康指标已经接近于不健康状况临界值。为此,建议应加强滦河下游河段的环境保护。     

Research on the interference control and resource allocation in D2D communication

In order to solve the problem of interference caused by D2D users reuse cellular resources in cellular network,an algorithm of interference control and resource allocation of D2D communication in single cell cellular system was proposed.Firstly,an interference graph was constructed according to the interference between users in the system to find the reusable channel resource for D2D users.Then,the channel resource pre-allocation and the channel switching policy were performed for D2D users in sequence according to the preset D2D user priority.The simulation results show that the proposed algorithm can significantly improve the system throughput and the access rate of D2D users so that the system can achieve better performance in the presence of small or large number of D2D users.     

基于新型时间放大器流水线时间数字转换器

针对传统时间数字转换器(TDC)中普遍存在的转换速度与转换精确度相互制约问题,提出一种适用于流水线型TDC结构的新型边沿对准时间放大器。这种时间放大器采用三级门控延时链与边沿合成器的级联结构,可实现增益为4的整数倍时间放大。在0.35 μm标准CMOS工艺下完成整体流水线型TDC的设计,仿真结果显示,输入动态范围为6.11 ns,时间分辨力为13.1 ps,转换速率为50 MSamples/s。相比于传统基于脉冲序列时间放大器的TDC,转换速率提高19.5%,精确度提高33.7%。     

APM:agent protection mechanism applied for IaaS platform

The interference of false or fake test data on IaaS platform will contaminate the evaluation results,confusing users’ choices for IaaS services.To solve this problem,an agent protection mechanism (APM) for IaaS platform test environment was proposed.It ensured the integrity and commanded validity of the agent without additional hardware or software.Also an effectiveness verification approach based on requests was presented to detect APM failure problems timely.An experiment environment according to APM was implemented to evaluate the effectiveness and the performance overhead.Experimental results show that the APM is effective in protecting agent integrity and command validation,and its performance overhead is minor.     

TiN薄膜的合成及其性能研究

用电子束蒸发沉积钛和40keV氮离子束轰击交替进行的办法合成了TiN薄膜。用RBS,AES,TEM,XPS,和X射线衍射研究TiN薄膜的组分和结构表明:用离子束增强沉积制备的TiN薄膜主要由TiN相构成;晶粒大小为30—40um,无择优取向;而非离子束轰击沉积的薄膜则是无定形的;用离子束增强沉积制备的TiN薄膜,其氧含量明显小于无离子束轰击薄膜的值;在TiN薄膜和衬底之间存在一个界面混合区,厚度为40um左右。机械性能测试表明,TiN薄膜具有高的显微硬度,低的摩擦系数。