Ultra-low power dissipation of improved complementary pass-transistor adiabatic logic circuits based on FinFETs

With the technology scaling down, low power dissipation has become one of the research focuses in the field of integrated circuit design. Various types of adiabatic logics have been invented for low-power applications. However, the expanding leakage current degrades the performance of conventional adiabatic logics. In this article, a novel improved complementary pass-transistor adiabatic logic （ICPAL） based on fin-type field- effect transistor （FinFET） devices with ultra-low power dissipation has been presented. The proposed ICPAL takes full advantage of different FinFET operating modes, that is, shorted-gate mode, independent-gate mode, and low-power mode, to make a tremendous reduction in power dissipation. For explication and verification, the power dissipation of different ICPAL standard cells has been investigated and compared with other types of adiabatic circuits based on FinFETs. The results show that the ICPAL circuits have ultra-low power dissipation in a wide range of clock frequencies（30-800 MHz） under the condition of similar number of transistors, and the average reduction in power dissipation is about 23.1%, 75.0%, and 50.0% relative to 2N-2N2P, improved pass- transistor adiabatic logic, and complimentary pass-transistor adiabatic logic, respectively. Furthermore, ICPAL supports a better pre-evaluation of system power dissipation in VLSI design and has an intrinsic characteristic for the resistance to some types of side channel attacks.     

珍珠粉、珍珠层粉、珍珠母粉的热重及热重动力学

采用热重及热重动力学方法 ,分别研究珍珠粉、珍珠层粉和珍珠母粉的热分解过程及其反应机理。结果表明 ,珍珠粉和珍珠层粉的热分解可分为二个阶段 :第一阶段为 2 50～ 370℃之间 ,失重率约 3% ,反应级数为 1 .6,活化能为 1 0 5～ 1 1 0 k J/ mol属于有机质的热分解 ;第二阶段为 60 0～ 770℃ ,失重率约为 40 % ,反应级数为 1 .3,活化能为 2 80～ 2 90 k J/ mol,属于碳酸钙的分解。珍珠母粉在 2 50～ 370℃之间不存在明显的失重。根据这一现象 ,可以通过热重分析来鉴别珍珠及其制品。     

新型干湿两用电机车冗余控制系统设计

介绍西门子S7-300 PLC和6SE70矢量变频器在平煤神马集团许昌首山焦化公司干湿两用电机车上的应用,重点阐述电机车多种运行控制方式及其冗余控制的实现.     

Joint optimal sensing time and power allocation for multi-channel cognitive radio networks considering sensing-channel selection

In this paper,we consider a multi-channel cognitive radio network(CRN)where each secondary user(SU)can only choose to sense a subset of channels.We formulate a joint optimization problem of sensingchannel selection,sensing time and power allocation under the constraints of average transmit power budget and average interference power budget,which maximizes the CRN’s total throughput.We propose a greedy algorithm to solve the joint optimization problem,which has much less computational complexity.Moreover,it is shown that the search space of the greedy algorithm can be further pruned.Finally,numerical results demonstrate that the greedy algorithm has comparable performance to the exhaustive search algorithm.     

大型乙烯“三机”情况调研及分析

介绍了我国乙烯装置的现状,根据调研我国大型乙烯“三机”的情况,重点分析了乙烯“三机”存在的问题、原因及处理措施。     

微波辐照对PET／PEN共混物非等温热降解行为的影响

用热失重分析法（TGA）对微波辐照不同时间的PET／PEN共混体系的热降解行为进行了比较分析，用图解微分法和差减微分法计算了降解反应表观活化能（E），频率因子（lnA）和反应级数（n）等降解反应动力学参数，并讨论了微波辐照对PET／PEN共混物热降解行为的影响及其机理。结果表明：微波辐照使PET／PEN共混物的降解反应活化能降低了约23-74kJ／mol，起始降解温度降低了4．16～13．08℃，失重速率加快了0．06～0．27％／℃，从而促进PET／PEN共混物的降解，降解动力学参数（n）的值从0．83增大到了1．86，降解反应的机理由分解控制转为扩散控制。     

线性双峰聚乙烯／低密度聚乙烯共混物的流变行为与力学性能

研究了线性双峰聚乙烯（LBPE）与低密度聚乙烯（LDPE）共混物溶体的流变行为，讨论了共混物的组成，剪切应力和剪切速率以及温度对熔体流变行为，熔体粘度的影响，测定了不同配比熔体的非牛顿指数（n)，熔体流动速率（MFR）及力学性能，为双峰聚乙烯的加工和使用提供了理论依据。     

气液固三相并流系统流型的混沌识别

运用确定性混沌分析技术，研究了气液固三相并流系统散式鼓泡流、聚式鼓泡流、柱塞流、泡沫流及环状流压力波动信号的混沌动力学行为。结果表明，吸引子可以用来表征气液固三相并流系统的动力学行为，混沌特征参数相关维D2和K熵可以用来定量识别以上五种流型。以混沌定量识别为基础，给出了三相并流系统的流型图。     

班级管理工作的创新

对班级管理中怎样培养学生的创新能力作了一定的阐述。     

基于微藻培养的沼液处理相关耦合技术进展

基于微藻培养的沼液处理相关耦合技术是近些年沼液资源化处理利用领域的研究热点。本文综述了沼液处理与CO₂固定耦合技术、沼液处理与高值生物质生产耦合技术、沼液处理与生态农业耦合技术等耦合技术的研究发展现状与优缺点，并指出了各耦合技术发展的关键问题，如沼液处理与CO₂固定耦合技术中高CO₂耐受性藻株选育与固碳影响机理研究问题、沼液处理与高值生物质生产耦合技术中低成本、低能耗高值生物质生产技术开发问题、沼液处理与生态农业耦合技术系统性评价体系缺乏问题等。最后，为促进耦合技术突破现有瓶颈，从微藻选育、微藻培养、沼液处理与沼气工程综合经济性4个角度提出相关的建议。