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Worn surface morphology was examined with scanning electron microscopy, and wear volume was measured with a Talysurf 5P-120 topographer. Results show that CNTs, in mass concentration of 0.01%~0.1%, can greatly improve the antiwear ability of lubricating oil. With addition of CNTs, the maximum reduction of wear rate is about 57%, and scratches on the worn surfaces become slighter and more uniform. The maximum decrease of friction coefficient is about 15% with 0.025% CNTs additive at the load of 300 N. The antiwear mechanism has been discussed.
结果表明:碳纳米管作为润滑油添加剂表现出优良的抗磨性能,在质量分数仅为0.0125%~0.1000%时,润滑油的抗磨性能显著提高;在质量分数约为0.0500%时其抗磨效果最佳,磨损率降低幅值达57%;在较高载荷下,添加0.0250%的碳纳米管能够使其摩擦系数减小约15%,但随着碳纳米管质量分数的增加,摩擦系数迅速提高;含碳纳米管润滑油的磨斑表面平整,划痕较细且分布均匀。
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Methods A total of 60 patients with acute stroke of less than 24 h duration were included in the study. Nutrition risk screening was done in all those patients, with nutritional parameters to evaluate their nutritional status. Nutritional parameters were evaluated at admission and after 14, 28 d after the stroke, respectively. Results We found 15 cases with nutrition risk of 60 patients in admission, and incidence rate of undernutrition is 13.3%.
收集我院急性脑卒中患者60例,均进行营养风险筛查评分,检测营养学的指标来评定其营养状况,对存在营养风险和营养不良的患者均进行常规脑卒中治疗和营养支持,在住院14d、28d后再进行营养风险评分和相应指标的检测,分析营养风险评分与营养评价指标的检测在临床工作中的作用。
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The articles published by Xiuhua News Agency quotes some of the means summarized by experts, which are adopted by America to manipulate the exchange rate: through some deceiving investment reports or some research outcomes to release misleading information into the market; oversold Euros and sterling pounds by hedge funds through hedge funds recently, and may attack Yen in the near future; presses RMB to appreciate to the level he expects through political, diplomatic and trading means; undersold Euros through stabilization fund to raise the value of dollar and lower the value of Euro, and then printed his home currency at a large scale to offset its bad debts.
新华社上述文章引用了专家归纳的美国操纵汇率的一些手法:通过带有欺骗性的投行报告、专家研究结果等,向市场释放诱导信息;近期通过对冲基金沽空欧元、英镑等外币,未来还有可能攻击日元;耍弄政治、外交和贸易手段,压迫人民币按其要求和标准升值;在金融危机中,先是通过平准基金大量抛售欧元,导致欧元狂跌、美元上涨,然后大肆印制钞票,填平坏账。
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Determination of blood pressure and heart rate : At the end of 12 weeks after lercanidipine treated, the rabbits were anesthetized with Urethan (5ml/kg). The right carotid artery was cannulated with a te for the measurement of blood pressure.
血标本:在实验开始时和4周、8周、12周末分别测定血清总胆固醇、甘油三酯、高密度脂蛋白胆固醇、低密度脂蛋白胆固醇,血清丙二醛含量和超氧化物歧化酶活力。
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At a mean follow-up of 15 months (range, 10-19 months), 19 (65.51%) of 29 patients had excellent results, and nine patients (31.03%) had acceptable results. HolCTU failed to maintain good flow in the latter group, necessitating internal urethrotomy/endoscopic dilation once or twice for stabilization (maximal flow rate 15 mL/s or greater). One patient (3.44%) had recurrent obstruction despite repeated internal urethrotomy, which finally required formal transpubic urethroplasty. All of the patients were continent, with no change in potency status.
经过15个月的后续追踪(范围在1 0-19个月),29位患者中有19 位(65.51%)患者有极佳的效果,另有9位(31.03%)患者有可以接受的效果;不过,后面几组无法以尿道造口术维持好的流动,为了稳定流速,需要一至两次内部的尿道造口术/内视镜扩张术(最大流速为5 mL/s 或更大);有1位(3.44%)患者虽然重复接受内部尿道造口术,但是一再发生阻塞,患者最后需要经正规的耻骨尿道成形术,全部患者可在不影响性功能的情况下控制排尿。
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The concentrations of CODcr and NH4+ vary from low to high, then from high to low in the process of refuse leaching, that is to say that there are three phases which are aerobian decomposition, facultative aerobian and anaerobian decomposition;(3)The time of landfill reaching to stabilize under the condition of filtration, for landfill of Jinqianpu, is at least 86 years if CODcr is regarded as a index; but is about 98 years when NH4+ as an index;(4)The column leaching experiment simulated is carried on interactivity between leachate and different lithologic characters, water-bearing media of different thickness. Some parameters can be determined by calculation, such as, the retained factor and hydro-chemical transportation rate of pollutants in suspended media, which quantitatively analyse the suspended soil capability of components purification and the pollution scope of water bearing media.
垃圾淋滤过程中和经历了一个由低到高、再由高到低的过程,即垃圾填埋过程中经历了好氧分解、兼性好氧分解及完全厌氧分解等三个阶段;(3)垃圾组分在淋滤条件下分解达到稳定的时间,对于金钱堡垃圾填埋场,若以作为考核指标,填埋场达到稳定化时间至少需要86年;若以作为考核指标,则填埋场达到稳定化至少需98年的时间;(4)对垃圾浸泡液与不同岩性、不同厚度含水层介质之间的作用进行了土柱淋滤模拟试验,通过计算污染质在包气带介质中运移的阻滞因子和水化学迁移率等参数,定量地描述了包气带土层对污染质的净化能力和污染范围。
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Our country since 1994 the exchange rate was axled,the foreign trade basically has been at a favorable balance condition,the foreign exchange reserve grows quickly;Thus causes the RMB gradually to face the pressure of appreciation. On the July 21,2005 The Peoples Bank of China announced the RMB appreciated 2% compared with US dollar,which has been clear about the inevitable trend of RMB appreciation.
我国自1994年汇率并轨以来,对外贸易基本处于顺差状态,外汇储备增长较快;从而使人民币逐渐面临升值的压力。2005年7月21日中国人民银行宣布人民币对美元升值2%,表明了人民币升值的必然趋势。
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The result suggested the presence of three typesreceptors at least in the compound eye of Chrysopa sinica Tjedar and Chrysopa50septempunctata Wesmacl, but four type receptor in Chrysopaformosa Brauer.3 The intensity make effect on ERGs value .The result indicate that the stronger the luminance, the higher the ERG value in a certain intensity range of monochromatic and white light stimuli,but the rate of improvement make creeping until the extent to intensity.
光强度对3种草蛉ERG值有影响,—定光强度范围内,草蛉复眼的ERG值皆随白光刺激光强度的增加而增大,至一定光强度时增加变缓,(但是在光强度为log=0时,并没有出现—个反应平台),呈现出—种近似线型的式样,表明:草蛉成虫复眼具有较强的光强度自调节和耐光能力。
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Compressed Air circumrotate at a high speed in the vortex tube, divided into two different airstreams after vortex in the vortex room, the air in the center of the tube have low temperature, and the air temperature out of the tube higher, adjust the rate of air in cooled and hot, we can get better refrigeration effect and hot effect.
气流在涡流管内高速旋转时,经过涡流变换后分离成总温不相等的两部分气流,处于中心部位的气流温度低,而处于外层部位的气流温度高,调节冷热流比例,可以得到最佳制冷效应或制热效应。
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By using the experiment animal and target animal to establish the pathology model of Colibacillosis, the experiment also measured out that matrine can effectively reduce the death rate of chicken caused by the Escherchia coli at the dose of 100mg/kg, showing that matrine has a good prohibiting effect on the Escherchia coli.
本实验还通过对实验和靶动物制造大肠杆菌病的病理模型,测定出苦参碱在100mg/kg的剂量下对大肠杆菌所致雏鸡死亡率有显著的降低作用。
- 推荐网络例句
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Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).
呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。
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The cost of moving grain food products was unchanged from May, but year over year are up 8%.
粮食产品的运输费用与5月份相比没有变化,但却比去年同期高8%。
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However, to get a true quote, you will need to provide detailed personal and financial information.
然而,要让一个真正的引用,你需要提供详细的个人和财务信息。