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所属行业:电气机械和器材制造业

  • 22861.2013年家电行业回顾:行业回暖市场复苏

    [电气机械和器材制造业] [2014-03-13]

    2013年,在中国经济形势呈现回升态势的同时,中国家电行业终于进入了国家一系列刺激性政策的尾声,家电行业告别政策救市,回归市场调节。虽然近几年家电企业深受政策影响,但是在充分竞争中成长起来的中国家电行业,敏锐地把握住消费升级的历史机遇,致力于产业的转型升级,产业竞争力和盈利能力得到显著改善。
    关键词:2013;家电行业;回暖;市场
  • 22862.空气净化器国家标准启动新一轮修订工作行业存在争议,宣传力度有待加强

    [电气机械和器材制造业] [2014-03-13]

    关键词:空气净化器;国家标准;修订工作;宣传力度
  • 22863.热泵热水器压缩机国标即将实施

    [电气机械和器材制造业] [2014-03-13]

    关键词:热泵热水器;压缩机;
  • 22864.并行电力系统动态应变分析的动态负载平衡和调度

    [电气机械和器材制造业] [2014-03-13]

    Power system simulations involving solution of thousands of stiff differential and algebraic equations (DAE) are extremely computationally intensive and yet crucial for grid security and reliability. Online simulation of minutes to hours for a large number of contingencies requires computational efficiency several orders of magnitude greater than what is todays state-of-the-art. We have developed an optimized simulator for single contingency analysis using efficient numerical algorithms implementation for solving DAE, and scaled it up for large-scale con-tingency analysis using MPI. A prototype parallel high speed extended term simu-lator (HSET) on in-house high performance computing (HPC) resources at Iowa State University (ISU) (namely Cystorm Supercomputer) is being developed. Since the simulation times across contingencies vary considerably, we have focused our efforts towards development of efficient scheduling algorithms through work stealing for maximal resource utilization and minimum overhead to perform faster than real time analysis. This chapter introduces a novel implementation of dynamic load balancing algorithm for dynamic contingency analysis. Results indicate potential for significant improvements over the state-of-the-art methods especially master-slave based load balancing typically used in power system community. Simulations of thousands of contingencies on a large real system were conducted and computational savings and scalability results are reported
    关键词:光机电;电力系统;动态调度;应变分析
  • 22865.高性能计算的电力系统动态模拟

    [电气机械和器材制造业] [2014-03-13]

    High-speed extended term (HSET) time domain simulation (TDS) is intended to provide very fast computational capability to predict extended-term dynamic system response to disturbances and identify corrective actions. The extended-term dynamic simulation of a power system is valuable because it provides ability for the rigorous evaluation and analysis of outages which may include cascading. It is important for secure power grid expansion, enhances power system security and reliability, both under normal and abnormal conditions. In this chapter the design of the envisioned future dynamic security assessment processing system (DSAPS) is presented where HSET-TDS forms the core module. The power system is mathematically represented by a system of differential and algebraic equations (DAEs). These DAEs arise out of the modeling of the dynamic components such as generators, exciters, governors, automatic generation control, load tap changers, induction motors, network modeling and so on. To provide very fast computational capability within the HSET-TDS, this chapter motivates the need for high performance computing (HPC) for power system dynamic simulations through detailed modeling of power system components and efficient numerical algorithms to solve the resulting DAEs. The developed HSET-TDS is first validated for accuracy against commercial power simulators (PSSE, DSA Tools, Power-World) and then it is compared for computational efficiency. The chapter investigates some of the promising direct sparse linear solver for fast extended term time domain simulation and makes recommendation for the modern power grid computations. The results provide very important insights with regards to the impact of the different numerical linear solver algorithms for enhancing the power system TDS.
    关键词:光机电;电力系统;动态模拟
  • 22866.电力系统矩阵图形处理单元的多项式预处理

    [电气机械和器材制造业] [2014-03-13]

    Programmable graphics processing units (GPUs) currently offer the best ratio of floating point computational throughput to price for commodity processors, outdistancing same-generation CPUs by an order of magnitude, which has in turn led to their widespread adoption in a variety of computationally demanding fields. Adapting power system simulations to these processors is complicated by the unique hardware architecture of GPUs, which precludes the usage of direct linear system solvers based on Gaussian elimination. Krylov subspace methods are better suited to the GPU architecture, yet the ill-conditioned nature of power system matrices requires substantial preconditioning to ensure robustness of these methods. To reduce the time spent on preconditioning, we have developed a GPU-based preconditioner designed specifically to handle the large, sparse matrices typically encountered in power system simulations. The preconditioning technique used, based on Chebyshev polynomials, is described in detail, as are the design decisions made in adapting this algorithm to the GPU. Evaluation of the performance of the GPU-based preconditioner on a variety of sparse matrices, ranging in size from 30 x 30 to 3948 x 3948, shows significant computational savings relative to a CPU-based implementation of the same preconditioner and a typical incomplete LU (ILU) preconditioner.
    关键词:光机电;电力系统;
  • 22867.小家电行业借力电商突围

    [电气机械和器材制造业] [2014-03-10]

    关键词:小家电;电商突围
  • 22868.家电行业季度分析报告——2013年3季度

    [电气机械和器材制造业] [2014-03-10]

    2013年5月,节能补贴政策告一段落,家电行业进入政策空窗期。2013 年1-8 月,家用电力器具制造业销售收入同比增长15.7%;生产彩色电视机8246.8 万台,增长4.4%,其中液晶电视6571 万台,下降0.3%。
    关键词:家电产业;空调;洗衣机;电视;冰箱;厨卫电器;变频空调;智能电视;空气净化器
  • 22869.集成电路行业:2014年政府工作报告解读

    [电气机械和器材制造业] [2014-03-10]

    第十二届全国人民代表大会第二次会议于2014年3月5日在京开幕,国务院总理李克强在工作报告公布2014年重点工作,指出产业结构调整要依靠改革,进退并举。其中,在「进」的方面,要设立新兴产业创业创新平台,在新一代移动通信、集成电路、大数据、先进制造、新能源、新材料等方面赶超先进,引领未来产业发展。
    关键词:集成电路;政府工作报告
  • 22870.电子行业:在集成电路等方面赶超先进-国家政府工作报告电子行业解读

    [电气机械和器材制造业,电力、热力、燃气及水生产和供应业,计算机、通信和其他电子设备制造业] [2014-03-07]

    2014年国家政府工作报告中对于促进新兴产业发展进行了论述,我们认为其中比较重要的内容有: “设立新兴产业创业创新平台,在新一代移动通信、集成电路、大数据、先进制造、新能源、新材料等方面赶超先进,引领未来产业发展。“”强化企业在技术创新中的主体地位,鼓励企业设立研发机构,牵头构建产学研协同创新联盟。“ “加大政府对基础研究、前沿技术、社会公益技术、重大共性关键技术的投入“。投资要点:第一次提出要在集成电路领域赶超先进;设立新兴产业创业创新平台,产业支持政策预计更加市场化;重申强化企业在技术创新中的主体地位,有望利好产业链龙头公司;继续坚定看好本土集成电路产业崛起。
    关键词:移动通信;集成电路;大数据;先进制造;新能源;新材料
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