排序方式: 共有25条查询结果,搜索用时 15 毫秒
12.
13.
厦门博坦10万吨级油码头位于厦门海沧嵩屿,南面正对鼓浪屿,西临厦门嵩屿电厂及九龙江口,工程由外商与中石化合资投建,是目前南方较大的成品油码头。码头为高桩梁板墩式结构,由6个靠船墩、8个系缆墩、内外侧装卸平台及栈桥组成。共有4件170t靠船构件,2件106t靠船构件,5件60t靠船构件。 相似文献
14.
本文主要分析了渗膜式压缩空气干燥器的结构、原理,并对渗膜式干燥器与目前在铁路机车上广泛使用的吸附式干燥器进行了对比分析,还对渗膜式压缩空气干燥器在机车上的应用前景进行了探讨。 相似文献
15.
Objective To study the toxic effects of 5-amionlevulinic acid-based photodynamic therapy (ALA-PDT) on human peripheral blood mononuclear cells (PBMCs), cord blood mononuclear cells (CBMCs) and peripheral blood stem cells (PBSCs), and furthermore, to understand the possible causes of this response. Methods We used MTT assay to detect the survival rate of PBMCs, CBMCs and PBSCs after treated by ALA-PDT under the optimum experiment conditions with U937 as control;Annexin V-FITC/PI was used to detect the pattern of cell death induced by ALA-PDT. By using flow cytometry, we detected intracellular PpIX fluorescence intensity. Results After ALA-PDT treatment the survival rate of PBMCs had no significant change;however in PBSCs and CBMCs, the survival rate reduced to 70%, and the survival rate of leukemia cell U937 was the lowest, about 30%. After incubation with ALA,except for PBMCs, intraceUuiar PplX fluorescence intensity of the other two kinds of normal haemocytes and U937 increased obviously. These results combined with the flow cytometry suggested that the main pattern of cell death here was apoptosts. Conclusion Under the optimum experiment conditions, ALA-PDT has a slight effect on normal haemocytes but excellent depletions of leukemia cells. Therefore, it can effectively purify autologons bone marrow or stem cell grafts. 相似文献
16.
为保证地铁、轻轨的正常高效运营,德国SIEMENS公司开发了OTN网.由于OTN网稳定可靠,可有效承担信息的传递与交换,因此在香港、上海和广州等城市的地铁系统中,均被采用. 相似文献
17.
本文是关于以微机为基础的涡轮增压器动态性能数值仿真研究,采用模块化结构,建立了涡轮增压器开式实验系统中的涡轮。压气机、燃烧室和转子的数学模型.采用美国威斯康星大学提供的TRNSYS动态系统仿真程序,在计算机上实现系统的动态仿真,可以得到在任何外界条件下涡轮工况的性能参数,其结果就好象在计算机建立了一个涡轮增压器系统实验台,所有的实验结果都可在计算机上得到。当输入实验相似的外界条件时,仿真所得参数与实验结果的比较说明了该系统的动态数值仿真是成功的。 相似文献
18.
19.
20.