THE PHYSICAL SIMULATION ON EXTRUSION PROCESS OF GLASS FIBER COMPOSITE WIRE COATED BY LEAD

The method of manufacturing the composite wire by extruding lead to coated glass fiber is described. The different composite wire that diameter is from 0.5 to 1.0mm has been produced by two kinds of different extruding technology (getting wire along horizontal direction and getting wire along perpendicular direction). The optimal extruding technological parameter has been given in different extruding technology by the physical simulation (H: 300℃, 550kN, 0.16mm. P: 300℃, 215kN, 0.16mm). The effect on the coating speed by other extruding technological parameters in the different extruding technology has been discussed. The extruding temperature and extruding force is higher, the coating speed is faster. It has been pointed, that the affection on the extruding technology by the extruding temperature has also behaved as the extruding temperature rising up spontaneously. The reason for exiting the minimum extruding force and maximum extruding force also has been discussion in this paper. It is also important to the extruding process and coating speed that is the coating clearance.     

采用有限元分析法量化不同中空玻璃边缘密封的热位移

间隔条和玻璃板片之间的相对热位移是中空玻璃边缘密封乃至中空玻璃(IGU)本身老化的主要原因之一.作者采用有限元分析法(FEA),建立了发生在大尺寸(1.5 m×2.1 m)的中空玻璃边缘密封的热位移与温差变化之间的模型,这是三种商业化的、不同材质的、不同设计的间隔条,在温度变化为-30～ 60℃范围内的模型.此模型是基于铝间隔条和镀锌钢间隔条与尼龙插角的搭配,不锈钢间隔条和弯曲插角的搭配.尼龙插角假定为实心的并稳固地固定于间隔条上;弯曲插角被建模成实心弯曲的金属插角,并同样稳固地固定于间隔条上.由于实际的弯曲插角是空心的,模型可能高估了这种转角设计的应力.正如预期那样,在低温时,插角会被向内拉,导致弯曲角度大于90°;在高温下,插角会被向外推,导致弯曲角度小于90°.通过检测发生在中空玻璃周边第一道密封的聚异丁烯密封胶厚度的变化,作者发现,到目前为止,不锈钢间隔条对于截面积的变化影响最小;铝制间隔条的影响最大.这个发现与基于间隔条材料与浮法玻璃之间热膨胀系数差异而预期的性能一致.因此,热位移引起的第一道密封的有效扩散横截面变化,可以解释为何具有不同间隔条材料的中空玻璃之间的性能差异.     

粘合增进剂对帘线与橡胶粘合的影响

本研究的目的是对２－硝基－２－甲基－１－丙醇（ＮＭＰ）与包括六甲氧基甲基蜜胺（ＨＭＭＭ）和六亚甲基四胺（ＨＭＴ）等在内的工业材料的粘合性能进行评估和比较，在硫化过程中，这些材料起亚甲基给予体的作用，与间苯二酚交联，生成粘合树脂，所有这些试验材料都已经在轮胎胶料中使用，以增进钢丝和织物增强材料与橡胶的粘合。本文论述了钢丝带速层和尼龙胎体层的粘合性能，用新硫化的和在不同老化条件下处理的硫化试样进行了试     

Metallation of Isatin (2,3-Indolinedione). X-Ray Structure and Solution Behavior of Bis(Isatinato)Mercury(II)

The first X-ray structure of an isatin (2,3-indolinedione, isaH) metal complex, bis(isatinato)memury(II) (C(16)H(8)N(2)O(4)Hg) (1), was determined. (1) was obtained from the reaction of isaH with mercury(II) acetate in methanol. Analogously, treatment of sodium saccharinate and mercury(II) acetate in methanol yielded Hg(saccharinato)(2) (*)0.5CH(3)OH (3). (1) crystallizes in the monoclinic system, space group P2(1)/ a with a = 7.299(1) A, b = 8.192(1) A, c = 11.601(1) A , beta = 105.82(1) degrees , V = 667.4 A(3), Z = 2, D(calc) = 2.452 g cm(-3), MoKalpha radiation(lambda = 0.71073 A), mu = 115.5 cm(-1), F(000) = 460, 21(1) degrees C. The structure was refined on the basis of 2023 observed reflections to R= 0.044. The two deprotonated, non coplanar isa ligands are trans to each other in a head to tail orientation and bound to the Hg through the nitrogen in a linear N-Hg-N arrangement. The Hg atom is at the center of symmetry of the complex and displaced by 0.62 A from the two planes of the isa ligands (tau Hg-N1-C2-O2= -16 degrees ). The Hg-N bond length is 2.015 A. Nopi-aryl-memury(ll)-pi-aryl stacking interaction was observed either in the solid state or in the solution state. The IR, electronic, and (1)H and (13)CNMR spectral data of (1) and (3) suggest binding of the memury to the heterocyclic nitrogen, in agreement with the crystal structure determination of (1).     

Al-3.5Cu-7Si合金拉伸断裂行为研究

观察了Al—3．5Cu-7Si合金拉伸断裂试样横截面的断裂路径，并结合力学性能试验对该合金的断裂行为进行了研究，总结了该合金中各种相的数量及形态对力学性能的影响。结果表明，除了高铸造气孔率明显降低该合金力学性能外，针状的硅相及由杂质铁产生的针状铁相(FeSiAl5)是导致Al-3．5Cu-7Si合金力学性能下降的主要因素：固溶处理温度偏高造成的局部熔化微区会严重损害其力学性能，而少量未溶解块状θ相(CuAl2)对其力学性能无显著影响。     

Ti5Nb人工钉扎中心NbTi超导体的磁通钉扎机制分析

采用棒基组合的装配方法，用热挤压和冷加工相结合的工艺制备了岛状Ti5Nb人工钉扎中心NbTi超导体，其中Ti5Nb体积含量为10％。通过对此超导体进行详细的磁通钉扎机制分析，认为样品的磁通钉扎力特征主要由正常相钉扎和Δκ扎相结合的机制决定。根据分析的结果，采用多源标度方法，很好地拟合了不同线径样品的磁通钉扎力密度随磁场变化的曲线。拟合的结果表明：样品在较低场下的性能主要由正常相钉扎机制决定，而在较高场下的性能主要由Δκ钉扎机制决定。并且随着线径的减小，正常相钉扎力密度和Δκ钉扎力密度均有不同程度的提高。     

Continued development of a mass balance model of chemical fate in a sewage treatment plant

Chemicals that pass through a sewage treatment plant (STP) and into receiving waters lead to exposure of human and ecological receptors. Most countries require that such chemicals and especially those that are new to commerce be assessed for their treatability in STPs using a screening-level model. The STP model has been widely used for such assessments in Canada, the US and elsewhere. It is important for both industry and regulators that such a model be simple, accurate and applicable even with the limited data available for most chemicals. The STP model has been upgraded to include the capability to handle ionizing chemicals, and a variety of treatment plant configurations commonly used in Canada and elsewhere around the world. A scheme for obtaining appropriate biodegradation half-lives for the different treatment options from available aqueous biodegradation half-lives or standard biodegradability tests is suggested. Model simulations show good agreement with pilot-scale experimental data from literature for 20 organic chemicals with widely varying physico-chemical properties.     

Comparison between laboratory and field leachability of MSWI bottom ash as a road material

The leaching properties of bottom ash from municipal solid waste incineration (MSWI) used as an aggregate substitute in unbound pavement layers are evaluated. The mechanical behaviour of bottom ash is acceptable for this application, but the potential environmental consequences constitute the most important limitation on the use of bottom ash as a road material. The environmental properties of bottom ash are assessed by means of the Dutch availability test NEN 7341 and the single-batch and two-stage batch European EN 12457 laboratory leaching tests. Furthermore, an experimental unbound pavement stretch is constructed to provide information on leaching behaviour under field conditions. In this high infiltration scenario, the results from predicted (based upon laboratory leaching tests) and measured releases (under field conditions) are compared, evidencing that predictions based on compliance leaching tests may be highly realistic. The depletion period of the extractable fraction of a number of elements in these field conditions is also quantified.     

用于激光器的电感储能发生器

研制了适用于激光器的电感储能发生器(GIES),并研究了它在高压混合气体中的放电和激光参数.研究表明,电感储能发生器可产生高压预脉冲并引起放电电流的突然增大,可在不同的混合气体中形成长时间的稳定放电,从而方便地控制和优化每一种气体混合物的预脉冲参数.在未知IES击穿电压和首次放电幅度下的参数时,电流尖峰会按因子1.5-...