国内外厚煤层大功率电牵引采煤机机电一体化新技术

介绍国内外大功率厚煤层电牵引采煤机的机电一体化新技术,包括总体技术、交流变频电牵引技术、工况检测、故障诊断技术、自动调高技术、远程通讯和集中控制技术。     

On the cost of searching signature trees

A precise analysis of the retrieval of signature trees is presented. A signature tree is a data structure constructed over a signature file to speed up searching all those signatures, which match a given query signature. The methods used include a detailed study of probabilistic analysis in conjunction with suitable contour integration of complex variabled functions.     

大规模定制下的质量控制系统框架设计

大规模定制为生产带来了变革和影响。针对新的生产方式的要求，根据推动大规模定制的过程方法和技术来分析他们对于质量控制产生的影响和要求，给出了大规模定制条件下的质量控制系统的建议，并给出了一个简要的系统模型。     

退火炉保护气氛的安全控制

钟罩室退火护采用微压氢气作为保护气体，炉内压力的监控是保证安全生产不可忽视的必要手段，该文针对该公司选用的国产钟罩式退火护作了简要介绍，对国产钟罩式退火炉压力监控系统作了分析，指出了存在的缺陷，提出了改进措施。     

Fast and accurate pricing of discretely monitored barrier options by numerical path integration

Barrier options are financial derivative contracts that are activated or deactivated according to the crossing of specified barriers by an underlying asset price. Exact models for pricing barrier options assume continuous monitoring of the underlying dynamics, usually a stock price. Barrier options in traded markets, however, nearly always assume less frequent observation, e.g. daily or weekly. These situations require approximate solutions to the pricing problem. We present a new approach to pricing such discretely monitored barrier options that may be applied in many realistic situations. In particular, we study daily monitored up-and-out call options of the European type with a single underlying stock. The approach is based on numerical approximation of the transition probability density associated with the stochastic differential equation describing the stock price dynamics, and provides accurate results in less than one second whenever a contract expires in a year or less. The flexibility of the method permits more complex underlying dynamics than the Black and Scholes paradigm, and its relative simplicity renders it quite easy to implement.     

燃料变化对气体燃烧器燃烧性能影响的数值模拟研究

该文以John Zink公司一种瓦斯燃烧器为几何原型,对燃烧器和稳焰旋流器附近三维复杂形状未作任何简化,生成了包括燃烧器和炉膛的结构化网格,换用甲烷、乙烷、丙烷和丁烷四种不同的气体燃料,用标准的k-ε湍流模型、k-ε-g湍流扩散燃烧模型和蒙特卡洛辐射换热模型对燃烧器内的流动及燃烧状况进行了全尺寸数值模拟,预报了燃烧器内流场和温度场,考察燃料变化对炉内温度场的影响规律及燃气射流特性参数(Re·D1)对火焰长度的影响,对进一步优化设计燃烧器、提高加热炉热效率有很好的指导意义。     

综合线损分析系统研究

描述了综合线损分析系统应该具有的主要功能和分析内容，介绍了系统实现中应该注意的几个问题、系统内容和实现方法。     

绿色供应链管理的基本原理

人口、资源与环境三者之间的矛盾日益突显，要求制造业提高其活动与环境的相容性。绿色供应链管理是从系统的观点与集成的思想出发解决制造业与环境之间冲突的有效方式。从可持续发展的思想出发建立了绿色供应链的概念模型，分析了绿色供应链管理的目标，在此基础上探讨了绿色供应链管理的基本原理，认为共生原理、循环原理、替代转换原理与系统开放原理是实施绿色供应链管理应该遵循的基本原理。     

结构工艺性冲突解决策略的研究

通过分析各种冲突解决方法的特点，提出了一种冲突的集成解决方案。采用面向对象的Object Pascal语言编制了一个实例，给出了该方法在零件结构工艺性设计中的具体应用。     

Development of intelligent multisensor surveillance systems with agents

Intelligent multisensor surveillance systems consist of several types of sensors, which are installed on fixed and mobile devices. These components provide a huge quantity of information that has to be contrasted, correlated and integrated in order to recognize and react on special situations. These systems work in highly dynamic environments, with severe security and robustness requirements. All these characteristics imply the need for distributed solutions. In these solutions, scattered components can decide and act with some degree of autonomy (for instance, if they become isolated), or cooperate and coordinate for a complete tracking of special situations. In order to cope with these requirements and to better structure the solution, we have decided to design surveillance system control as a multiagent system. This is done by applying an agent-orientated methodology, which is assessed with concrete scenarios.