一种作业弹性与截止时间感知的作业调度算法

针对采用MapReduce模型的大数据分析作业的调度问题进行深入研究，并分析现有任务调度算法的缺陷，现有算法没有考虑资源分配对于作业截止时间的影响，也未考虑不同类型作业截止时间的敏感性问题。因作业的完成时间随着分配资源的不同而改变，故称之为弹性作业，截止时间敏感性是指不同类型作业对截止时间要求的严格程度不同。针对以上问题，提出一种截止时间感知的弹性作业调度算法（DA）。该算法将作业依据截止时间敏感程度进行分类，在基于作业整体执行时间预测的基础上，通过调控不同的资源分配策略来改变作业完成时间，同时结合用户对于截止时间的需求及作业预执行的收益来提前规划作业的资源分配及调度次序使得整体收益最大化。将算法在仿真拥有210个物理节点的集群中进行实验，实验表明该算法满足了截止时间的限制并使得作业整体收益值平均提高了2.37倍。     

防差错系统在软胶囊生产中的应用

随着制造执行系统(manufacturing execution system, MES)在汽车制造业中的广泛运用, 越来越多的行业开始导入MES系统。我国保健食品行业发展迅速, 市场规模不断扩大, 越来越多的企业将MES系统导入到生产过程中, 目前绝大多数企业只停留在MES系统的初级阶段, 用于物料、容器具和人员的追踪等。我司在MES系统的基础上, 对软胶囊生产进行防差错系统开发, 将防差错系统与MES系统全方面的结合, 并运用到软胶囊生产过程中。通过对软胶囊生产工艺分析, 确定各个环节的质量风险点, 增加探头感应器、扫描枪、编程, 赋予设备与物料条形码, 实现配料化胶、压丸、干燥选丸防差错系统的开发。防差错系统的开发应用, 减少了软胶囊生产过程的质量风险点, 避免人为因素带来的质量偏差, 实现生产过程中的局部自动化, 为实现软胶囊连线生产奠定了扎实的基础。     

Goal-oriented dynamic test generation

ContextMemory safety errors such as buffer overflow vulnerabilities are one of the most serious classes of security threats. Detecting and removing such security errors are important tasks of software testing for improving the quality and reliability of software in practice.ObjectiveThis paper presents a goal-oriented testing approach for effectively and efficiently exploring security vulnerability errors. A goal is a potential safety violation and the testing approach is to automatically generate test inputs to uncover the violation.MethodWe use type inference analysis to diagnose potential safety violations and dynamic symbolic execution to perform test input generation. A major challenge facing dynamic symbolic execution in such application is the combinatorial explosion of the path space. To address this fundamental scalability issue, we employ data dependence analysis to identify a root cause leading to the execution of the goal and propose a path exploration algorithm to guide dynamic symbolic execution for effectively discovering the goal.ResultsTo evaluate the effectiveness of our proposed approach, we conducted experiments against 23 buffer overflow vulnerabilities. We observed a significant improvement of our proposed algorithm over two widely adopted search algorithms. Specifically, our algorithm discovered security vulnerability errors within a matter of a few seconds, whereas the two baseline algorithms failed even after 30 min of testing on a number of test subjects.ConclusionThe experimental results highlight the potential of utilizing data dependence analysis to address the combinatorial path space explosion issue faced by dynamic symbolic execution for effective security testing.     

Die Baugesellschaft Gebrüder Rank und ihre spanischen Ziegelgewölbe in München

The Rank construction company and the introduction of brick vaults in Munich after 1945 The construction of vaults without scaffolding with thin bricks has a centuries‐old tradition, particularly in Spain and Italy. Since the beginning of the 19^th century, it has been successfully spread mainly on the American double continent. The Rank Brothers construction company in Munich is known to date as one of those construction companies that began building with concrete in its home city very early on. New investigations, which were made possible above all by the provision of archive material by Paul Basiner, now point to an additional focus of this company's work. The architects and engineers of the company had been also able to familiarise themselves with this traditional Spanish brick‐vaulted construction method via the branch office in Spain, which was established from 1911 on. This knowledge was particularly in demand in the years following World War II, when the destroyed vaults had to be rebuilt with simple means and low material consumption. Together with Carl Sattler, who had become acquainted with similar construction methods in Italy, brick vaults were initially used to complete the construction of the Landeszentralbank in Munich. In the following years, Rank was able to provide many buildings in and around Munich with brick vaults. It was not until the 1960s that this construction technique went out of fashion and was thus somewhat forgotten.     

煤矿企业安全生产调度执行系统研究

生产执行系统(MES)是连接上层企业资源计划(ERP)与底层过程控制系统(PCS)的桥梁,是基于ERP/MES/PCS三层结构扁平化管理的综合自动化系统(CIMS)的关键。针对煤炭生产过程的特点,提出煤炭行业的制造系统体系结构,形成具有煤炭行业特色的MES(安全生产调度执行系统),对其各部分的功能进行了阐述,并进一步讨论了安全生产调度执行系统的软件平台。     

探讨如何加强工程量清单计价合同的管理

工程量清单计价的合同贯穿在建设工程的实施过程中,如何在计价方式、风险约定、合同备案、合同的履行等方面进行管理,有利于《建设工程工程量清单计价规范》的推广和执行。     

浅谈提升企业执行力

阐述了执行力是企业市场竞争取胜的根本保证,从人员、决策制度、监督考核等方面分析了当前影响企业执行力的主要因素,深入地探讨了提升企业执行力的途径,以提高企业的执行力,从而保证企业的生存和发展。     

创作与转译—SOM近期作品综述

回顾评介SOM的发展进程及近期作品。     

执行电力工程建设概算定额(沉井工程)存在的问题与对策

电力工程建设概算定额是一套专业性定额,是全国各省市水厂电厂的工程项目建设(如水厂的铁皮沉淀池工程和电厂的循环水取排水系统工程等)在招投标领域中使用较为广泛的一套定额,笔者针对上述系列工程项目在实际执行该定额过程中的实质性问题,用实例来阐述在执行沉井工程定额过程中遇到的一些问题,并针对这些问题提出相对应的对策,以借鉴同行。     

深入贯彻<会计法>努力消除会计信息失真

就会计信息失真的屡查不止的恶劣现象，从主观和客观两方面分析了其原因，指出要彻底消除这一现象，既要不断提高会计人员的职业道德水平和业务素质，又要不断强化企业内部的制约和监督体系，加大执法力度。