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通过现场观察、实践学习和经验总结,对军事攀登中抓结的种类、优缺点及主要用途进行了积极探讨,以期为有关组训人员进一步提升抓结的应用效果提供参考. 相似文献
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We used compiled geochemical data to investigate the mechanisms that control Mg#(molar ratio of Mg/(Mg+FeT)) in andesitic arc lavas.We find that andesites from mature continental arcs with crustal thickness of>45 km have systematically higher Mg# than those from oceanic arcs with crustal thickness of<30 km.The elevated Mg# in continental arc lavas results from strong Fe depletion during high-pressure differentiation favored in thick crusts.This proposal is reinforced by our comp... 相似文献
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“Experience the Heritage： Digital Exhibition on China＇s Intangible Cultural Heritage” was recentlyheld in the Capital Museum in Beijing, as part of the celebrations to mark the 6fth annual Cultural Heritage Day. 相似文献
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山东省农民健康状况的实证研究 总被引：2，自引：1，他引：1
运用文献资料、问卷调查、数理统计和逻辑分析法,采用定量分析与定性分析相结合的手段,对山东省农民的生产生活基本状况、经济收入、生活方式、身心疲劳程度等内容进行调查和分析。发现农民患各种慢性病的比率较高,高收入农民和低收入农民的身心健康状况均不良,中等收入农民的健康水平反而较好,总体上农民患病率呈现两头高中间低的趋势。在分析影响农民身心健康的诸种因素的基础上,针对存在的问题提出了相关的对策和建议。 相似文献
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The development of sodium-ion(SIBs) and potassium-ion batteries(PIBs) has increased rapidly because of the abundant resources and cost-effectiveness of Na and K.Antimony(Sb) plays an important role in SIBs and PIBs because of its high theoretical capacity,proper working voltage,and low cost.However,Sb-based anodes have the drawbacks of large volume changes and weak charge transfer during the charge and discharge processes,thus leading to poor cycling and rapid capacity decay.To address such draw... 相似文献
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Jing ZHAO Hui-min YAN Ya LI Jia WANG Lu HAN Zhi-hao WANG Meng-xiong TANG Wei ZHANG Yun ZHANG Ming ZHONG 《Journal of Zhejiang University. Science. B》2015,16(5):380-387
目的:观察匹伐他汀钙对高胆固醇血症患者外周血管的影响。创新点:首次在国内发现匹伐他汀钙能够改善高胆固醇血症患者肱动脉和颈动脉血管内皮功能而且延缓其动脉粥样硬化发展,并首次证实改善内皮功能是匹伐他汀钙延缓其动脉粥样硬化发展的重要原因。方法:按照入选排除标准,选取本院高胆固醇血症患者(HC),完成超声心动图检查的40例。根据剂量不同,分为两个剂量组:1 mg剂量组20例(男性5例,女性15例,平均年龄(55.20±8.35)岁),2 mg剂量组20例(男性9例,女性11例,平均年龄(57.56±6.09)岁)。访视结束后完成超声心动图检查的HC组36例,两个剂量组分别有2人失访。治疗后1 mg剂量组18例(男性3例,女性15例,平均年龄(56.00±7.85)岁),2 mg剂量组18例(男性7例,女性11例,平均年龄(57.79±6.46)岁)。选择本院同期体检中心30例正常人作为对照(年龄和性别均与病例组匹配,男性14例,女性16例,平均年龄(54.94±6.90)岁)。所有研究对象,均经隔夜禁食12~14小时,次日清晨抽取空腹肘静脉血,测定临床生化指标。采用Sequia512彩色多普勒超声诊断仪,应用高分辩率外周血管超声技术,检测HC治疗前后肱动脉血流介导性舒张功能(FMD)、颈动脉结构和功能。结论:经匹伐他汀钙治疗8周后,高胆固醇血症患者血管功能明显改善,表现为FMD升高,僵硬度减小;颈动脉僵硬度和内中膜厚度(IMT)延缓进展与其内皮功能改善密切相关。 相似文献
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Ming Hong 《中外文化交流(英文版)》2006,(8):22-23
Bronze Standing Figure The bronze standing gure, 2.62 meters high with a 0.8-meter foundation, is the largest bronze masterpiece of ancient China ever discovered. The bronze gure wears a lotus-shaped crown carved with cloud and thunder patterns. It has a skinny face, two big eyes, a high nose bridge and a wide mouth. A small hole is pierced on each of its ears for hanging ear rings. The gure wears a serious but peaceful expression, its eyes shining with profound wisdom and its thin mouth lip… 相似文献
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WANG Jing-qin WANG Hai-tao WEN Ming ZHU Yan-cai 《浙江大学学报(A卷英文版)》2007,8(3):459-463
Because of the different ways in which contact materials work, the basic requirements for silver metal oxide contact materials are different. They are anti-welded and anti-erosion when closed, anti-erosion when broken, and arc easily moved and have smaller contact resistance. In this paper, La2O3 is used as a stable oxide in contact material to replace CdO. A new type of Ag/SnO2-La2O3-Bi2O3 contact material is first obtained through using powder metallurgical method. Then electrical contact material parameter tester is used to test the electrical contact performance of the contact material. Through experiments, the arcing voltage and current curves, arcing energy curves, fusion power curves while broken and contact resistance while closed were obtained. Analysis of the results showed that the addition of La2O3 makes the contact material have the following advantages： smaller electrical wear, smaller arc energy, smaller contact resistance and arc is more easily extinguished. 相似文献
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INTRODUCTIONTherearemanymanufacturedtoolsandprod uctsfordailyusethatarefabricatedbyironsuchas:ironmongery ,ironplate,ironstrap ,ironwire ,ironstairsandotherironworks.Theseproductsimprovethelivingconditionsofourlife.Toachievethevarioususegoalsandgivespecia… 相似文献
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HUANG Taosheng QI Ming 《Journal of Zhejiang University. Science. B》2005,6(12):1223-1226
The First Hangzhou International Symposium on the Medical and Laboratory Applications of Medical Genetics and Genomics was held in Hang-zhou from October 6~8, 2005. The symposium was organized and sponsored by the First Affiliated Hos-pital, School of Medicine, Zhejiang University and co-sponsored by the Zhejiang Medical Association; School of Medicine of Zhejiang University; the James Watson Institute of Genomics Sciences and Beijing Genomics Institute/Huada Genomics Center of t… 相似文献