电极表面处理和电极材料对微型点焊时电极粘附的影响

研究了电极表面处理和电极材料对镀镍钢板和镍板微型点焊时电极粘附的影响。结果表明：电极表面涂敷TiC后能提高CuCrZr电极和GlidCop60电极的抗粘附性能，其原因是涂层中的TiC能阻碍电极和镀镍板之间的局部焊接；GlidCop60电极的抗粘附性能优于CuCrZr电极的抗粘附性能，其原因是弥散分布于GlidCop60电极中的Al2O3能阻碍电极和镀镍板之间的局部焊接。     

硫黄促进剂体系用非迁移性助活性剂低聚物

本文报道的研究目的是开发迟效性促进剂硫黄硫化体系用助活性剂。这种添加剂可以提高交联键的形成速率而很少改变或者根本不改变混炼胶或其硫化胶的抗焦烧性性能或其他性能。本研究的另一目的是要设计一种具有慢效作用的硫化体系助活性剂。它不会从橡胶贴合制品(如轮胎)的一个部分迁移或者扩散到相邻的部分中去。本研究的初期阶段曾致力于评价一系列用作乳聚丁苯橡胶(SBR)硫化助活性剂的高分子量乙烯基吡啶二烯烃乳液共聚物。这些共聚物在室温下绝大部分是橡胶态的,它们都很容易分散于丁苯橡胶混炼胶中。使用乙烯基吡啶共聚物得到的初步结果是令人鼓舞的。     

从微观经济学看企业计算市场发展

基于2006—2013年的历史市场数据,本文从微观经济学的角度分析了企业计算资源市场的供需关系。工业界可以依据本文所提供的数据设计更好的定价策略,从而同时达到市场扩张和增加营收的目的。     

日本第一台商用多种固体流化床（MSFB）锅炉的设计和运行经验

0 引言近年来,在日本营造燃用低质固体燃料的锅炉日益增多,其中主要集中在循环流化床(CFB)锅炉上,这是因为它具有:1)广泛的燃料适应性;2)低的 NO_x 和 SO_2 污染排放。1986年三井公司建造了日本第一台商用 MSFB 锅炉,它被用作 Kuraray 化纤公司的自备动力装置。在此锅炉的设计与运行之前,作者利用试验装置研究了 MSFB 密相床的特性,以保证其性能和运行稳定性。此外,作者还研究了 MSFB 中所采用的固体循环系统在增加燃烧稳定     

REACTIVE DIFFUSION BETWEEN Si AND NbC AT 1300℃

ＲＥＡＣＴＩＶＥＤＩＦＦＵＳＩＯＮＢＥＴＷＥＥＮＳｉＡＮＤＮｂＣＡＴ１３００℃Ｃ．Ｒ．Ｋａｏ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｃａｌＥｎｇｉｎｅｅｒｉｎｇＮａｔｉｏｎａｌＣｅｎｔｒａｌＵｎｉｖｅｒｓｉｔｙＣｈｕｎｇＬｉ，Ｔａｉｗａｎ）Ｊ．Ｗｏｏｄｆ...     

淬火条件对变截面圆柱体裂纹的影响

前言为了防止淬火裂纹和变形,普遍采用分级淬火和延迟淬火。分级淬火是将奥氏体化后的试样,先浸入到稍高于上马氏体点(马氏体开始转变点)的淬火液中等温停留一段适当时间,然后取出空冷,以获得马氏体组织的淬火方法。延迟淬火是将奥氏体化温度的试样从加热炉中取出,先在空气中停留一定时间,然后再进行淬火。     

Spatial and functional relationships between air conduits and blood capillaries in the pulmonary gas exchange tissue of adult and developing chickens

The documented data regarding the three-dimensional structure of the air capillaries (ACs), the ultimate sites of gas exchange in the avian lung is contradictory. Further, the mode of gas exchange, described as cross-current has not been clearly elucidated. We studied the temporal and spatial arrangement of the terminal air conduits of the chicken lung and their relationship with the blood capillaries (BCs) in embryos as well as the definitive architecture in adults. Several visualization techniques that included corrosion casting, light microscopy as well as scanning and transmission electron microscopy were used. Two to six infundibulae extend from each atrium and give rise to numerous ACs that spread centrifugally. Majority of the ACs are tubular structures that give off branches, which anastomose with their neighboring cognates. Some ACs have globular shapes and a few are blind-ending tapering tubes. During inauguration, the luminal aspects of the ACs are characterized by numerous microvillus-like microplicae, which are formed during the complex processes of cell attenuation and canalization of the ACs. The parabronchial exchange BCs, initially inaugurated as disorganized meshworks, are reoriented via pillar formation to lie predominantly orthogonal to the long axes of the ACs. The remodeling of the retiform meshworks by intussusceptive angiogenesis essentially accomplishes a cross-current system at the gas exchange interface in the adults, where BCs form ring-like patterns around the ACs, thus establishing a cross-current system. Our findings clarify the mode of gas exchange in the parabronchial mantle and illuminate the basis for the functional efficiency of the avian lung.     

Compact cryogenic system with mechanical cryocoolers for antihydrogen synthesis

We have developed a compact cryogenic system which cools a vacuum chamber housing multi-ring trap electrodes (MRTs) of an antihydrogen synthesis trap using mechanical cryocoolers to achieve background pressure less than 10(-12) Torr. The vacuum chamber and the cryocoolers are thermally connected by copper strips of 99.9999% in purity. All components are installed within a diametric gap between the MRT of phi108 mm and a magnet bore of phi160 mm. An adjusting mechanism is prepared to align the MRT axis to the magnet axis. The vacuum chamber was successfully cooled down to 4.0 K after 14 h of cooling with heat load of 0.8 W.     

为什么显示器也需要通过Vista认证

最近有些读者朋友问：现在微软为什么这么霸道,连显示器都要通过它的认证,没有通过Windows Vista认证的液晶显示器会有什么不同吗？液晶显示器和Windows Vista操作系统之间到底有什么必要的联系呢？通过Windows Vista认证的显示器又有什么好处呢？针对上述种种疑问,今天我们将为大家一一解答。     

Transport of the dicyanogold(i) anion

We have shown that dicyanogold(I), [Au(CN)(2)](-) is a common metabolite found in blood and urine samples of patients treated with different gold based drugs. Some patients have high levels of gold within their red blood cells (RBCs). Size exclusion and C18 reversed phase chromatography show that the majority of the gold in RBC lysates is bound to protein, but small molecules such as dicyanogold(I) and gold-glutathione complexes are also present. Dicyanogold incubation with red blood cells in vitro leads to a rapid and complete uptake of gold. This uptake is unaffected by DIDS, an inhibitor of the anion channel, but is blocked by the addition of external cyanide. Dicyanogold is also readily taken up by H9 cells, a continuous CD(4+) cell line. This uptake is significantly inhibited by N-ethylmaleimide, suggesting a requirement for sulfhydryl groups. Dicyanogold inhibits the replication of the AIDS virus, HIV, in a cell culture model.