专题学习网站在高职院校公共选修课的设计与应用

本文从高职院校开设公共选修课的意义和特点出发,以现代教育理论为指导,以现代信息技术为手段,为《乒乓球》这门公共选修课设计一个专题学习网站并介绍了应用。     

服装开襟纸样制作方法

介绍了服装开襟纸样制作的方法.服装开襟式样多,在服装中具有功能和装饰两种作用,服装中不同式样的门襟能充分显示出服装设计的特色.     

QoS-Aware Composite Services Retrieval

For current service-oriented applications, individual web service usually cannot meet the requirements arising from real world applications, so it is necessary to combine the functionalities of different web services to obtain a composite service in response to users＇ service requests. In order to address the problem of web service composition, this paper proposes an efficient approach to composing basic services in case no any individual service can fully satisfy users＇ requests. Compared with the general strategies adopted in most previously proposed approaches where only the best composition solution is produced, the QoS-aware service composition approach is given and top k solutions in the framework are provided, rather than focusing on obtaining the best composition solution, since the presented approach allows more candidates that are likely to meet the requirements of the users. The approach is based on a succinct binary tree data structure, and a system,named ATC （Approach to Top-k Composite services retrieval） system is implemented. In ATC, Qos is taken into account for composite service, and a heuristic-based search method is proposed to retrieve top k composite service. Some extensive experiments are designed and two web service benchmarks are used for performance study. The experimental results snow that the proposed approach can assure high precision and efficiency for composite service search.     

基于高分五号DPC氧气A吸收波段的云顶压强反演

云顶压强可用于估计云高,对气象观测和云特性研究等具有重要的作用.基于高分五号卫星搭载的多角度偏振探测仪(DPC)在氧气A吸收带设置的763 nm和765 nm两个波段进行了云顶压强反演方法的研究.首先,通过辐射传输模拟和多项式拟合得到了大气压强的计算公式,并对拟合公式进行了误差分析和校正.然后,分析了气溶胶、大气廓线等...     

顶网成形器的安装、调试与使用效果

介绍金城造纸股份有限公司两台国产文化用纸纸机安装使用顶网成形器的效果.介绍了顶网成形器的结构形式、技术实数以及安装调试过程.使用顶网成形器后,不仅加快了网部脱水速度,而且降低了成纸两面差,产品质量明显提高.     

几种材料拔色性能和常用染料可被拔色性能的研究

通过用进口／国产拔色材料,对国产／进口染料所染毛皮进行交叉拔色实验,研究了二氧化硫脲、保险粉、亚硫酸氢钠、硫脲的拔色性能以及一些常用染料的可被拔色性能。     

级联H桥光伏逆变器开关管开路故障诊断

多电平逆变器包含大量的半导体开关,以级联H桥光伏逆变器为例,针对开关管开路故障提出一种快速故障诊断和处理方法。在载波的顶端或底端采样每个H桥模块的输出电压,将其作为判断开关管开路故障的判据。诊断完成后,采取相应的措施降低故障程度。该方法可在一个载波周期内完成故障开关管的精确定位。实验结果验证了该方法的有效性。     

干法腈纶制条生产工艺

介绍了干法腈纶的制条生产工艺。结果表明:干法腈纶因其纺丝成形工艺特殊,纤维结构致密,截面成犬骨状,因而与湿法腈纶有不同的特点。合理设定拉断热板温度及拉伸、各区域拉伸倍数、再割区隔距及梳理拉伸等工艺参数,可成功开发出符合需求的3.33dtex干法腈纶膨体毛条。     

放顶煤开采顶煤变形与破碎特征

以放顶煤开采现场实测为基础,着重探讨了顶煤的变形特征、顶煤变形与支承压力的关系;对比分析了“卸载降架－拉架－支撑”和“带压移架”不同移架方式对顶煤破碎效果的影响,结果表明,支架的反复支撑对煤具有明显的破碎作用。     

Two types of a passive safety containment for a near future BWR with active and passive safety systems

The paper presents two types of a passive safety containment for a near future BWR. They are named Mark S and Mark X containment. One of their common merits is very low peak pressure at severe accidents without venting the containment atmosphere to the environment. The PCV pressure can be moderated within the design pressure. Another merit is the capability to submerge the PCV and the RPV above the core level. The third merit is robustness against external events such as a large commercial airplane crash. Both the containments have a passive cooling core catcher that has radial cooling channels. The Mark S containment is made of reinforced concrete and applicable to a large power BWR up to 1830 MWe. The Mark X containment has the steel secondary containment and can be cooled by natural circulation of outside air. It can accommodate a medium power BWR up to 1380 MWe. In both cases the plants have active and passive safety systems constituting in-depth hybrid safety (IDHS). The IDHS provides not only hardware diversity between active and passive safety systems but also more importantly diversity of the ultimate heat sinks between the atmosphere and the sea water. Although the plant concept discussed in the paper uses well-established technology, plant performance including economy is innovatively and evolutionally improved. Nothing is new in the hardware but everything is new in the performance.