基于Wiki的企业标准制修订系统

开发了一种基于Wiki的企业标准制修订系统,主要用于帮助大企业集团开展面向分布在各地的下属企业协同制订和修订企业标准.其主要特点是：（1）将企业标准制修订中的各个环节,如制定计划、起草标准、征求意见、审查、投票、批准发布、修订等过程放在企业的外联网/内联网上协同进行;（2）利用Wiki模式下的标准投票机制,通过民主的方法,选择最佳的标准框架和条目;（3）利用Wiki模式,通过大众化评价方法,进行标准协同制订和修订,集中大家的经验和智慧,使企业标准日趋完善;（4）利用Wiki系统收集标准实施中的反馈信息,提高反馈信息收集的效率.由于标准得到大多数人的认可,实施的效果就会好得多.通过基于Wiki的企业标准制修订系统,可以有效地提高企业的标准制修订能力,显著提高标准制修订的效率和质量,并降低标准制修订成本.     

Cu nanoparticle preparation in a tube-in-tube microchannel reactor and encapsulation by silica

An approach to fabricate Cu@SiO₂ nanostructured materials was presented by using Cu nanoparticles (NPs) produced in a tube-in-tube microchannel reactor (TMR) as the core. Due to the excellent micromixing efficiency of the TMR, monodisperse Cu NPs of sub-5 nm were easily obtained. A combination of the direct silica-coating technique with the remarkable ability of the TMR for mass production of nanoparticles may open an economic pathway for producing core-shell nanomaterials.     

Rapid fabrication of organic/organic photonic bandgap films with tuneable mechanical properties using blended polymer spheres

In this study, the photonic bandgap (PBG) film with tunable mechanical properties and photonic stop band was prepared by a simple and feasible approach. Colloid polymer spheres with a relatively large diameter (approximate D_n of 200 nm) and different glass transition temperatures (T_g) were blended with small polystyrene (PS) latex (D_n = 20 nm) and were subsequently casted on a substrate for 3 h at 50°C for self‐assembly of the PBG film. The monodispersed polymer spheres were synthesized by soap‐free emulsion polymerization in the boiling state. The T_g values of the spheres were predetermined based on the Fox equation, and designed to fall in the region of ?34°C to 112°C. Small PS could also be synthesized by this approach using the comonomer, sodium p‐styrenesulfonate (NaSS), to ensure the small diameter. The long‐range ordered structure constructed by embedding the small PS in the PBG film was indirectly confirmed on the basis of SEM analysis, from which the monochromatic film color was determined based on Bragg's diffraction law. Tunable film color was achieved by adjusting the diameter of the spheres, as evaluated using UV–Vis. Tunable mechanical properties of the PBG film were also achieved by varying the T_g of the spheres or the filling ratio of small PS. Based on these approaches, the ultimate tensile strength could be tuned in the region between 0.39 to 4.7 Mpa, and the relative strain could be varied from 1236% to 16%, illustrative of the excellent deformability of the film. Furthermore, by variation of these two parameters, the film properties could be changed from typical elastomer behavior to brittle plastic polymer type behavior, greatly extending the prospective application fields. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40276.     

异形气雾罐的数值模拟与试验研究

异形金属气雾罐成形中,会产生壁厚减薄严重及皱折破裂等成形缺陷。采用数值模拟的方法,对气压胀形的工艺参数进行优化处理,可以降低胀形区应力,减小壁厚减薄率和改善壁厚分布状况,数值模拟结果与试验验证结果吻合较好,研究结果对工艺优化和过程控制具有实用价值。     

LaDy_(0.1)Fe_(11.4)T_(0.1)Si_(1.5)(T=Mn,Fe,Co)合金的磁热效应

使用电弧炉熔炼制备了LaDy0.1Fe11.4T0.1Si1.5(T=Mn,Fe,Co)系列合金。XRD分析表明该系列合金具有NaZn13型立方单相晶体结构,空间群为Fm-3c。磁性测量表明:随着替代原子T原子半径的减小,合金的居里温度(TC)逐渐增大。在外场变化ΔB=1.5T时,该系列合金的最大磁熵变分别为12.3,25.0,11.4J/kg·K。     

Influence of the Interphase on Impact Properties of Zirconium Silicate Filled High-Density Polyethylene

Yellow zirconium silicate is a promising substitute for cadmium pigments used in plastics. However, the incorporation of zircon pigment in HDPE without loss of impact strength is required. By introducing the untreated pigment in the polymer, the impact strength reduces to 60% of the value for the unfilled polymer. Different types of silane coupling agents were used to regain the impact strength of the composite. Octadecylsilane acted as a wetting agent rather than as a coupling agent. The impact strength hardly improved. A vinyl functional and a methacryloxy functional silane improved the impact strength to 70% relative to the unfilled polymer. The physically bonded, interdiffused network formed by silane and polymer improves the impact strength by the flexible nature of the interphase. An azidosilane improved the impact strength only to 73%: the interphase bonded covalently to the polymer as well as to the filler, in that way improving the impact strength, but behaving as a brittle system. A relatively thick, flexible interphase bonded covalently to filler and polymer was created. This interphase improved the impact strength to the value of the unfilled polymer.     

对全球化语境下中国住区景观设计风格的思考

以全球化背景下的当代中国城市住区景观为对象,筒述了中国住区景观发展历程,对当代中国住区景观西化现象进行反思。通过探讨住区景观设计风格背后的问题,期望借此促进中国住区景观设计回归本土设计哲学。     

玻璃粉对混凝土性能的影响

为降低玻璃对环境的危害以及水泥生成过程中产生的能耗,文中通过测试玻璃粉对工作性能以及耐久性能的影响,并运用XRD、SEM、MIP等微观分析方法探究机理,研究发现玻璃粉部分替代水泥有助于改善混凝土的工作性,但由于玻璃粉的替代,导致水化的胶凝材料的减少,孔隙率增加.随着龄期的增加,玻璃粉的火山灰反应有利于降低有害空隙,在适...     

奥运村微能耗楼工程能源利用效果分析

介绍了奥运村微能耗楼的能源系统设计和运行管理措施,针对2008年夏季的运行情况,测试和分析了微能耗楼能源系统的效率,结果表明节能效果十分显著.