摘要：本文从电视播控系统的硬盘服务器架构、二级存储、容量和带宽、网络与控制及播总控等方面论述了陕西电视台新播控系统的设计原则及方案。

摘要：采用常压铸渗成型工艺制备了一种新型的三维连续网络结构碳化硅/铸铁复合材料,利用销盘摩擦磨损试验机对复合材料在干摩擦条件下的摩擦磨损行为及耐磨机制进行了研究。结果表明:复合材料的相对耐磨性高达基体灰铸铁的4.7～7.9倍,平均摩擦系数为基体灰铸铁的46%～89%,具有良好的抗干摩擦磨损性能。

摘要：Most routing protocols for sensor networks try to extend network lifetime by minimizing the energy consumption, but have not taken the network reliability into account. An energy-aware, load-balancing and fault-tolerant routing scheme, termed as ELFR was propsed to adapt to the harsh environment. First a network robustness model was presented. Based on this model, the route discovery phase was designed to make the sensors to construct into a hop-leveled network which is mesh structure. A cross-layer design was adopted to measure the transmission delay so as to detect the failed nodes. The routing scheme works with acknowledge (ACK) feedback mechanism to transfer control messages to avoid producing extra control overhead messages. When nodes fail, the new healthy paths will be selected locally without rerouting. Simulation results show that our scheme is much robust, and it achieves better energy efficiency, load balancing and maintains good end-to-end delay.

摘要：采用泡沫塑料先驱体挂浆成型法和高温烧结法制备三维网络结构SiC陶瓷预制体,通过常压铸渗成型工艺制备了三维连续网络结构SiC陶瓷/灰铸铁复合材料,结果表明:SiC质泡沫陶瓷骨架表面经铜化合物法金属化处理后,可有效改善金属对陶瓷相的润湿与铸渗能力,使得铸态复合材料的抗拉强度提高约17%;复合材料的体积密度为6.26g/cm3,比灰铸铁降低了11%;复合材料经热处理后,其硬度为热处理前的1.62~2.91倍,抗压强度为热处理前的1.56~2.04倍。