降下
- 与 降下 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Under drought stress,content of soluble protein increased first and thendecreased,and content of soluble saccharide increased continuously.
在干旱胁迫下,可溶性蛋白质含量呈现先升后降的变化特点,而可溶性糖含量则持续上升,因而推测可溶性糖在逆境条件下,起抗脱水作用的时间可能比蛋白质要长一些。
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Different groups were received oral administration of different treatment for one month. The capability limens of the sacculus that caused abdomen-uplifting and back-arching and the time of contract of abdomen muscle in rats were observed. The levels of 5-hydroxytryptamine (5-HT), substance P, and calcitonin gene related peptide were evaluated.
观察各组大鼠在不同因素影响下的肠道内扩张引起腹部抬起和背部拱起的容量阈值和大鼠肠道内不同容量下扩张期间腹壁收缩次数,检测5-羟色胺(5-HT)、P物质、降钙素基因相关肽含量。
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Using a single pulse solar cell tester with constant light intensity for 5ms, we have studied the performance of conventional crystalline silicon solar cell with low concentrator( 1~10 sun)and cells temperature of 15~110℃at laboratory.
结果表明,室温下常规太阳电池的最佳工作点电压V_m和光功率放大系数a随入射光强增加呈现先增后降的趋势,并且串联电阻小的电池下降速度慢,串联电阻大的电池下降速度快;温度对晶体硅太阳电池的工作电压和输出功率相当敏感;在严格控制太阳电池工作温度的条件下,串联电阻小的电池在较宽的聚光范围内可以获得良好的使用效果。
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Numerical simulations were done for a bistable latch valve of the system by FLUENT, and three groups of datum for different fluids were obtained with the same effective exit sectional area. Besides, a static mathematic model for the electromagnetic valve was established based on the obtained datum. Secondly, the motion of the valve spool was realized by UDF file in FLUENT. Three kinds of motions, uniform, acceleration and motion driven by the coupling effect of the liquid resistance and the electromagnetic force, were calculated and compared. The dynamic characteristic of the electromagnetic valve was obtained by analyzing the relationship of the mass flow rate of the inside flow field of the electromagnetic valve, the change of the drop pressure of the passageway of the valve, and motion time.
并针对系统中的某双稳态电磁阀,使用商用CFD软件FLUENT对其进行内部流场的数值模拟,通过使用不同流体介质,不改变阀门有效出口截面积的情况下,分析得到的三组数据,建立了该电磁阀的静态数学模型;通过编写UDF文件,实现对阀芯运动方程的控制,在阀门做由闭合到开启、开启到闭合运动时,控制阀芯分别做匀速运动、匀加速运动以及阀芯受到液体阻力与电磁力作用力的耦合力的运动,分析了三种工况下电磁阀内部流场质量流率和阀门出口入口压降的变化以及运动时间,从而得到该电磁阀的动态特性。
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Effect of austenitizing temperature and air cooling rate on microstructure and properties of the CFB/M steel;2. Discussion on the feasibility and economy of 1000MW ultra-supercritical direct air cooling unit;3. Metal transformation temperature under air cooling condition was actually measured.
实测了空冷条件下金属的温度,分析了相变潜热释放引起的温降速度变化规律,并通过冷却速度曲线畸变特征点对实际工况下的金属相变开始温度和结束温度以及相变持续时间进行了判定。
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In microwave condition Ce~(4+) may oxidize sulfur compound such as the benzothiophene mainly in diesel fuel into sulfonea for the first time. By choosing proper solvent DMF to extract sulfonea, thus in microwave condition sulfur content in diesel fuel is reduced from 554ppm to 96ppm, up to 82.7% desulfurization ratio.
3微波条件下首次使用Ce~(4+)来氧化柴油中的硫化物并把这类硫化物氧化成砜类化合物,再选用合适的溶剂DMF,把这些砜类化合物通过萃取的方法除去,微波条件下的氧化脱硫可以将柴油中的硫含量从554ppm降到96ppm,达到82.7%的脱硫率。
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The ultra-drystorage is the technique,to lower seedmoisture contentless than 5%and store it at ambienttemperature to gain the same storability as seeds with higher MC at coldtemperature.
超干贮藏就是把种子含水量降至传统的安全含水量(5%)以下,并在常温下贮藏以达到高含水量种子在低温下贮藏的相同效果。
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RESULTS :① The left anterior descending branchwas most likely to be damaged;②The specificity between the wall-motion abnormality in A,AS,Apex an d single LAD disease was great (P.05);LAD and left circumflex artery infarcts could lead to AL and I regional wall-motion abnormalities respective l y;contractile function hypokinetic of the single I segment was mostly connected with LCX and right coronary artery injuries;patients with whole left ventricul ar contraction function hypokinetic always suffered from the three-vessel disea se .
结果:①冠状动脉梗塞后左前降支受累最为多见(45%);②LAD单支病变与前壁、前间隔及心尖部室壁运动异常有关(P.05)。LAD与左回旋支病变,主要为前间隔和下壁运动异常;而单纯的下壁室壁运动异常多为左旋支与右冠状动脉病变引起。3支病变造成心肌运动普遍减低,且以侧壁及前侧壁的室壁运动异常则更为显著(P.05)。
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During the researchperiod, the researcher collects a great number of literatures and research data. On theadvanced bases, the paper summary the achievement of previous development innatural disaster risk research both in domestic and abroad for references. Starting fromearth systemic and scientific thought, the paper makes analysis on the maincharacteristics of natural disaster risk system and probes into the theories and methodsof natural disaster risk assessment. The paper apply Remote Sensing and GIStechniques to take apart the dynamic assessment ways and modes of natural disasterrisk in diverse scales cities, in order to provide scientific basis for urban disaster riskdecreasing and risk decision-making management.
在国家自然科学基金项目&中国沿海城市自然灾害风险评估体系研究&和重点项目&沿海城市自然灾害风险应急预案情景分析&的资助下,调查分析了中国沿海典型城市自然灾害发育特征及其风险管理,获得了大量的文献资料与数据基础上,借鉴国内外自然灾害风险研究进展的成果,从地球系统科学思想出发,分析了典型城市自然灾害风险系统主要特征,探讨城市自然灾害风险评估方法与理论,并应用遥感和GIS技术,剖析城市不同尺度下的自然灾害风险动态评估途径和范式,为城市综合减灾降险和风险管理决策提供科学依据。
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MDA content, cell division , he activities of NR, CAT, POD and SOD of Pistia sagittifolia and Myriophyllum Spicatum with heavy metal,s ion concentration to appear a trend of ascending firstly and desending secondly . This trend explains that Pistia sagittifolia and Myriophyllum Spicatum on the Toxic Effects have similarities under handing the single Pb2+ and Hg2+. As the range of the concentration which each index is arriving at the maximum is different, this also indicates that there are some differences of the Toxic Effects between Pistia sagittifolia and Myriophyllum Spicatum under handing the single Pb2+ and Hg2
丙二醛含量、脂膜透性、硝酸还原酶活性、过氧化物酶活性、超氧化物歧化酶活性、过氧化氢酶活性随重金属离子浓度的增加呈先升后降趋势,说明在单一Pb2+和Hg2+处理下大薸和穗状狐尾藻毒害效应具有相似性;但各指标到达最大值的浓度范围不同,又说明单一Pb2+和Hg2+处理下大薸和穗状狐尾藻毒害效应具有差异性。
- 推荐网络例句
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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.
随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。
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But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.
不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。
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Closes the eye, the deep breathing, all no longer are the dreams as if......
关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。