基于DSP的嵌入式系统的程序引导设计

作对以DSP为核心的嵌入式系统的程序引导功能进行了深入的研究及分析,并以TI公司的TMS320C33芯片为实例,归纳了其实现流程及设计方案,从硬件和软件两个方面阐述了实现该功能的关键点和值得注意的地方。该设计已被应用于一个配电网环网柜智能终端装置。运行实践表明,是一种简便、可靠的方案。     

Milling process simulation for the variable pitch cutter based on an integrated process-machine model

Milling process simulations provide a useful way to design and adjust the technical parameters of milling process. As the milling process involves coupling     

分布式实时数据库在输变电系统中的应用

本论文主要对分布式实时数据在输变电系统中各项事务管理和数据汇总处理等应用进行阐述.首先介绍了分布式实时数据库及其特点,接着,详细介绍了分布式实时数据库在输变电系统中的应用.分布式实时数据库的建立可以实现对国网山西省电力公司检修公司所有事务的处理和对所运营的各地区的变电站实时数据进行汇总和处理,同时为智能变电站网络管理系统的建立提供知识库数据和专家经验.为变电站的联网运行奠定基础.     

建筑师应博学

前辈梁思成先生在上世纪四十年代于清华大学教导学生：“建筑师的知识领域要很广,要有哲学家的头脑、社会学家的眼光、工程师的精确与实践、心理学家的敏感、文学家的洞察力……但是最本质的,他应当是一位有文化修养的综合艺术家”.     

High-pseudocapacitance of porous and square NiO@NC nanosheets for high-performance lithium-ion batteries

Layered nickel oxides have been focused with intense research interests as high-performance lithium-ion batterie(LIB) anode.However,it is hard to obtain few layered nickel oxides material directly as it easily forms bulk material with the strong interaction between the interlayer.In this work,two-dimensional(2 D) nickel-based coordination polymers were successfully prepared according to aqueous phase copolymerization approach.And then uniform carbondoped NiO nanosheets were successfully obtained from facile solution assembly and post-thermal treatment.The detailed electrochemical testing shows that the uniform NiO nanocrystals encapsulated into porous N-doped carbon(NiO@NC) nanosheets present much higher rate capability with the discharge specific capacity of 782.7 mAh·g~(-1) at high current density of 2.0 A·g~(-1) than pure NiO(690 mAh·g~(-1)).It also shows long-term cycling performance with 91 % retention after 50 cycles at 1.0 A·g~(-1).The high rate capability,cycling stability and the easy synthesis make NiO@NC nanosheets as a promising candidate for LIB anode and build up new way for the fabrication of metal oxides anode materials.     

Strength,strain capacity and toughness of five dual-phase pipeline steels

The effect of microstructures on strength, strain capacity and low temperature toughness of a micro-alloyed pipeline steel was elucidated. Five various dual-pha...     

摩擦改进剂对改善燃油经济性的影响研究

采用四球机试验,考察了钼胺化合物、二烷基二硫代氨基甲酸钼、无灰型摩擦改进剂与摩擦因数的关系以及它们之间的复配作用。结果表明：摩擦改进剂（FM）降低摩擦因数的效果与其化学结构有关;加入量提高,摩擦因数的改善效果明显;不同化学结构的摩擦改进剂复配使用,可以减低整个温度区的摩擦因数。     

负载氯喹的骨靶向纳米颗粒打破肿瘤细胞增殖与骨吸收之间的恶性循环

肿瘤细胞增殖与骨吸收之间的恶性循环加剧了骨肿瘤的进展和转移风险.为此,我们设计并制备了聚乙二醇-阿仑膦酸钠修饰的聚多巴胺(PPA)纳米粒子,并在其表面负载自噬抑制剂氯喹(CQ),期望利用该治疗载体(PPA/CQ)打破肿瘤细胞增殖与骨吸收之间的恶性循环,从而有效地治疗骨肿瘤.实验证明,PPA/CQ可以有效地富集到骨组织,...     

Liutex identification on hairpin vortex structures in a channel based on msfle and moving-PIV

The spatiotemporal evolution of hairpin vortex structures in a fully developed turbulent boundary layer is investigated qualitatively and quantitatively by usin...