2010 CAV award announcement

The 2010 CAV (Computer-Aided Verification) award was awarded to Kenneth L. McMillan of Cadence Research Laboratories for a series of fundamental contributions resulting in significant advances in scalability of model checking tools. The annual award recognizes a specific fundamental contribution or a series of outstanding contributions to the CAV field.     

交叉口混合交通流微观控制模型

为构建智能网联汽车(CAV)和有人驾驶汽车(HDV)混合通行情况下的交叉口通行机制与控制方法, 本文提出CAV专用道条件下交叉口协同通行模型. 首先, 设计CAV专用道条件下的交叉口布置, 对交叉口进行网格化处理,将CAV通行时隙和HDV绿灯相位对交叉口某部分网格某时段的占用统一到交叉口时空资源描述框架下; 其次, 建立兼顾CAV与HDV的交叉口时空网格资源分配模型, 构建自适应信号灯控制算法和CAV轨迹规划算法; 再次, 以车辆最小延误为目标进行自适应信号灯配时优化和CAV轨迹优化; 最后, 选取广州某典型交叉口建立仿真实验对所提方法的有效性进行了验证.     

定风量系统中空调房间建模与Matlab仿真

本文介绍了定风量空调系统的基本原理,着重对定风量(CAV)空调系统房间数学模型进行了推导。最后文章利用仿真软件Matlab对整个空调控制系统进行了仿真,得到了良好的系统响应。     

光盘光道布局与性能

同心圆光道与螺旋线光道在光记录性能上各有其特色．与恒角速度（ＣＡＶ）布局相比，恒线速度（ＣＬＶ）布局增大了数据存储容量，却增长了存取时间．分区恒角速度（Ｚ－ＣＡＶ）布局具有介于恒角速度式布局和恒线速度布局之间的性能。改进恒角速度（ＭＣＡＶ）式记录方式，利用可变数据传输率通道，可在分区恒角速度式记录方式的基础上获得恒角速度布局的存取速度和恒线速度布局的数据存储容量。     

2011 CAV award announcement

The 2011 CAV (Computer-Aided Verification) Award was presented on July 17, 2011 at the 23rd annual CAV conference in Snowbird, Utah to Thomas Ball and Sriram Rajamani of Microsoft Research for their contributions to software model checking, specifically the development of the SLAM/SDV software model checker, which successfully demonstrated computer-aided verification techniques on real programs.     

Innovation quality in knowledge cities: Empirical evidence of innovation award competitions in Finland

Innovation awards have for long attracted policy makers as a method for innovation promotion. Still, academic research on innovation awards has thus far received little attention. In particular, empirical studies on the motives to enter award competitions and the realized impacts of winning an innovation award are scarce. This study addresses this research gap. Firm-level evidence, questionnaire data on innovation award winning companies of the Finnish national Innofinland and Quality Innovation of the Year award competitions, indicate that the motives for companies to participate in award competitions and the realized impacts of winning an award are largely the same: media coverage and a credibility boost. The importance of innovation awards in innovation policy was, however, considered only as mediocre or modest. As a conclusion it can be stated that innovation awards are an additional tool for innovation promotion, alongside innovation inducement policies including tax reductions and direct funding, as they produce significant positive effects for the award winning companies, and an additional indicator of innovation quality in the context of knowledge cities.     

Design and results of the 2nd annual satisfiability modulo theories competition (SMT-COMP 2006)

The Satisfiability Modulo Theories Competition (SMT-COMP) arose from the SMT-LIB initiative to spur adoption of common, community-designed formats, and to spark further advances in satisfiability modulo theories (SMT). The first SMT-COMP was held in 2005 as a satellite event of CAV 2005. SMT-COMP 2006 was held August 17–19, 2006, as a satellite event of CAV 2006. This paper describes the rules and competition format for SMT-COMP 2006, the benchmarks used, the participants, and the results.     

An impact study of integrating connected automated vehicles with conventional traffic

Connected and automated vehicles (CAVs) promise to change the transportation landscape with safer, faster and more energy-efficient mobility. However 100% CAV penetration may never be achieved, raising the question of how to ensure a productive co-existence of CAVs with conventional vehicles. In this paper, we address the problem of optimally controlling CAVs under mixed traffic conditions where both CAVs and human-driven vehicles (non-CAVs) travel on the roads. We specifically consider problems with such mixed traffic crossing an intersection without using explicit traffic signaling, the objective being to minimize energy consumption subject to a throughput maximization requirement while guaranteeing safety constraints. The impact of CAVs on overall energy consumption is investigated under different traffic scenarios as a function of the CAV penetration rate (i.e., the fraction of CAVs relative to all vehicles). Performance under traffic light control is used as a baseline for this study. Results are validated through simulation using MATLAB and VISSIM. The results indicate that the energy efficiency improvement becomes more significant as the CAV penetration rate increases, while the significance diminishes as traffic becomes heavier.     

基于J2EE的高校研究生学位授予管理系统的设计与实现

介绍目前高校研究生学位授予工作中的主要问题,提出开发一套基于J2EE技术架构的研究生学位授予管理系统来解决这些问题的需求,并给出该系统的功能流程设计、数据库设计及开发实现。     

基于Spring Boot+ Vue的学生评奖评优 系统的设计与实现

高职院校每年都要对学生进行各类评奖评优的活动,如何公平公正且高效率地评奖评优对学生和教师而言都有着重要意义,能更加激发学生的学习热情,同时也能减轻教师的工作负担,有效节省人力成本。基于此,设计并实现了学生评奖评优系统。系统采用B/S 架构,使用前后端分离模式,后端采用Spring Boot + MyBatis 实现,前端采用Vue 框架实现,前后端通过Ajax技术实现数据交互,数据基于JSON格式。数据库使用MySQL,通过MyBatis 实现数据库读写操作。     

智能建筑中央空调系统的控制

本文详细介绍了智能建筑中定风量空调系统和变风量空调系统的结构、主要的控制内容以及空调系统典型的控制规律。     

MBNQA criteria in education: assigning weights from a Malaysian perspective and proposition for an alternative evaluation scheme

In order to improve quality and productivity among American companies, the Malcolm Baldrige National Quality Award (MBNQA) was launched by the National Institute of Standards and Technology (NIST) under the US Department of Commerce in 1987. Over the years, the award has proved to be effective in improving companies' market share, customer satisfaction, employee morale, and also profitability. MBNQA has been a ‘role model’ in developing a national quality award for many other countries in the world. Furthermore, for organizational self‐assessment, the criteria framework of MBNQA has been in use throughout the world. Presently, the award is offered in three categories: Business, Education, and Health care. The present paper is concerned with MBNQA in Education. NIST has developed a comprehensive set of criteria to be fulfilled in order to be eligible to win the award. However, in the existing literature, it is not clear how the weights are assigned to the criteria and subcriteria. The present paper uses the analytic hierarchy process (AHP) to reassign criteria weights from a Malaysian perspective. Furthermore, the paper points out the fallacy of the present evaluation scheme and proposes an alternative one based upon the absolute measurement procedure of AHP. The modified scheme is expected to enhance the fairness of the evaluation of the award aspirants. The paper also shares the experiences gathered in data collection using AHP.     

基于事件触发机制的双编队车辆换道决策模型

针对由联网自动化车辆(connected and automated vehicle,CAV)组成的双编队车辆换道问题进行了研究,提出了一种基于事件触发的分布式换道决策模型.该模型针对双编队系统设计了一种编队内和编队间的一致性控制协议;同时,为了减少CAV车辆控制器的频繁更新,设计了一种基于组合测量方式的事件触发器,并给出Lyapunov函数证明了算法的稳定性且不存在Zeno行为.仿真结果表明,所设计的控制协议能够使双编队系统收敛一致,有效降低CAV控制器的更新频率,减少系统能耗.通过模型对比,在证明所提决策模型有效性的同时,系统能够更快地收敛.     

具有能量奖励策略的微正则退火算法

为提高微正则退火算法求解旅行推销员问题的最终解质量,提出一种对妖的能量进行奖励的策略,在拒绝状态时增大妖所携带的能量,用以提高脱离局部极值的能力.按照能量奖励后是否做限界检查,给出了无上界约束和有上界约束两种实施方式.仿真显示无上界约束的能量奖励策略能够提高最终解的质量,而有上界约束不能提高算法性能.为加快应用该策略后的收敛速度,设计了一种容忍机制,降低了搜索到最优解时的平均目标评价次数.     

CEDA Currents

Among this month's CEDA Currents newsletter items are the ICCAD 2009 conference, the IEEE Embedded Systems Letters' most-accessed articles; results of the Memocode Codesign contest, the results of the CAV Award, the IEEE CEDA Phil Kaufman Award; and upcoming CEDA events.     

How Award‐Winning SMEs Manage the Barriers to Innovation

Much attention has been focused on increasing the so‐called ‘innovation quotient’ of national manufacturing economies. In particular, there has been widespread interest in revealing and examining those barriers that impede innovation, the suggestion being that the removal of such barriers constitutes a prerequisite for successful innovation. This study reports on the experiences of eight firms who had received a UK Design Council ‘millennium product’ award for ‘groundbreaking’ innovation. The implication of the award is that these firms should have overcome any barriers they faced and therefore act as exemplars of how to manage innovative new product development. However, the research shows that the firms were as likely to ignore barriers as they were to address them. Living with a barrier as an alternative to overcoming it is clearly an acceptable strategy for a number of these award winners. The study reports on how the firms managed the various barriers that they encountered.     

新型电容式液位变送器的研制

本文介绍了一种电容式液位传感器的工作原理和电路设计的新方法,它通过利用单片的电容/电压信号转换芯片CAV424实现了对电容量简单而准确测量,该变送器具有测量精度高、可靠性好和较高的性价比等优点.     

地面交通控制的百年回顾和未来展望

从路权这个新的角度回顾了过去100年地面交通控制发展的几个关键转变点，并结合目前新兴的网联车和无人车技术，分析了今后50年地面交通控制的发展方向.     

A comprehensive analytical performance model for disk devices underrandom workloads

Our goal is to contribute a common theoretical framework for studying the performance of disk-storage devices. Understanding the performance behavior of these devices will allow prediction of the I/O cost in modern applications. Current disk technologies differ in terms of the fundamental modeling characteristics, which include the magnetic/optical nature, angular and linear velocities, storage capacities, and transfer rates. Angular and linear velocities, storage capacities, and transfer rates are made constant or variable in different existing disk products. Related work in this area has studied Constant Angular Velocity (CAV) magnetic disks and Constant Linear Velocity (CLV) optical disks. We present a comprehensive analytical model, validated through simulations, for the random retrieval performance of disk devices which takes into account all the above-mentioned fundamental characteristics and includes, as special cases, all the known disk-storage devices. Such an analytical model can be used, for example, in the query optimizer of large traditional databases as well as in an admission controller of multimedia storage servers. Besides the known models for magnetic CAV and optical CLV disks, our unifying model is also reducible to a model for a more recent disk technology, called zoned disks, the retrieval performance of which has not been modeled in detail before. The model can also be used to study the performance retrieval of possible future technologies which combine a number of the above characteristics and in environments containing different types of disks (e.g., magnetic-disk-based secondary storage and optical-disk-based tertiary storage). Using our model, we contribute an analysis of the performance behavior of zoned disks and we compare it against that for the traditional CAV disks, as well as against that of some possible/future technologies. This allows us to gain insights into the fundamental performance trade-offs     

基于CAV444的电容式液位传感器设计

介绍了电容式液位传感器的测量原理,提出了一种基于新型电容测量集成电路芯片CAV444的电容式液位传感器的设计方案。测试结果表明,该传感器性能稳定,测量精度较高,误差较小,能够满足低浓度瓦斯输送安全监测系统的水位监测需求。