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大功率行波管新型慢波线技术的进展 被引量:17
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作者 王文祥 宫玉彬 +2 位作者 魏彦玉 余国芬 赵国庆 《真空电子技术》 2002年第6期13-18,共6页
全金属慢波结构由于具有热耗散能力强 ,功率容量大 ,比耦合腔慢波线带宽宽 ,结构整体性好 ,尺寸大等一系列优点而备受人们关注。本文着重介绍了螺旋槽、环板、曲折波导及周期加载波导四类结构的发展现状 ,包括理论研究与实际应用情况 ,... 全金属慢波结构由于具有热耗散能力强 ,功率容量大 ,比耦合腔慢波线带宽宽 ,结构整体性好 ,尺寸大等一系列优点而备受人们关注。本文着重介绍了螺旋槽、环板、曲折波导及周期加载波导四类结构的发展现状 ,包括理论研究与实际应用情况 ,探讨了新型慢波线在技术上存在的问题及今后的努力方向 ,指出全金属慢波结构将在毫米波行波管、返波管。 展开更多
关键词 大功率 行波管 慢波线技术 慢性结构 螺旋槽 曲折波导 周期加载波导
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Clinical pathological study of treatment of chronic hepatitis with hyperbaric oxygenation 被引量:1
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作者 刘伟 赵伟 +2 位作者 吕翔 郑小刚 罗婵 《Chinese Medical Journal》 SCIE CAS CSCD 2002年第8期1153-1157,147-148,共5页
OBJECTIVE: To detect the feasibility and theoretic basis for treatment with hyperbaric oxygenation (HBO) in chronic hepatitis and to compare the changes in hepatic function, immunity, pathologic morphology, ultrastruc... OBJECTIVE: To detect the feasibility and theoretic basis for treatment with hyperbaric oxygenation (HBO) in chronic hepatitis and to compare the changes in hepatic function, immunity, pathologic morphology, ultrastructure and HBV in hepatic tissues before and after treatment. METHODS: Sixty cases of chronic hepatitis were randomly selected and divided into two groups: the experiment (n = 30) and control groups (n = 30). Patients in the experimental group were treated with HBO for 6 courses. Patients in the control group were treated for 60 days with the usual drugs used in the clinic. The function and bloodstream graph of liver were examined and liver biopsies were made before and after treatments. Routine paraffin sections were stained with HE and observed under the light microscope. Ultra thin slides from paraformaldehyde and glutaraldehyde fixed liver tissue were stained with lead citrate and observed with the transmission electric microscope. HBsAg and HBcAg in liver of the experimental group were detected with ABC immunohistochemistry method before and after treatment. RESULTS: For the experimental group, ALT, SB, gamma-GT, AKP, IgG, and IgM in blood and the degeneration and necrosis of hepatocytes were remarkably decreased (P 0.05), and the expression of HBsAg and HBcAg in liver was not weakened (P 展开更多
关键词 Hyperbaric Oxygenation ADULT FEMALE Hepatitis Chronic Humans IMMUNOHISTOCHEMISTRY Male Middle Aged
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