使...影响
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The research contents mainly include: First, the influence of foundation constraint condition to the temperature stress is analyzed, the temperature stress formula of ultra-long concrete anchor plate is deduced, then the influence of length to structure crack can be gotten from the formula. Second, a breathing method is set up to solve the problem of temperature stress in ultra-long concrete constructions. By setting the sliding floor, a breathing system is built up and the temperature stress reduced distinctly. Third, the effect of prestress technique in the control of temperature stress is analyzed, it is simulated and calculated through FEA to get the right way to apply the prestress. Forth, the delay of temperature field and unsteady conduction is considered, the temperature field of ultra-long concrete structure with later poured band is simulated, then temperature stress distribution after casting the concrete is calculated, finally the effect of later poured band to temperature stress of ultra-long structure is analyzed.
本文的研究内容主要包括:(1)分析了基础约束对超长混凝土结构温度应力的影响,推导了超长混凝土地基板温度应力公式,从而得出长度对结构裂缝的影响;(2)针对超长混凝土裂缝问题,提出了一种可呼吸的解决方法,通过设置滑动层,使结构成为一种"可呼吸"体系,从而有效的降低温度应力;(3)分析了预应力技术在控制超长结构温度应力中的作用,通过有限元模拟计算,得到合理的预应力施加方式;(4)考虑温度场的滞后效应及不稳定传导,对带后浇带超长混凝土结构浇注后的温度场仿真模拟,计算浇注后的温度应力分布,分析后浇带对超长结构温度应力的影响。
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Morphological conversion from spiralto coccoid forms occurred when HP was cultured with selenium and most of coccoid forms had fragmentary flagella and pilus; the effection of selenium to activity of urease, catalase, alkaline phosphatase is not exist or not evidence; selenium enable pET32a-vacA-E.coli BL21 which can express VacA produce yellow lipochrome, and the color become deeper with increasing of concentration of selenium; selenium can decrease expression of recombined VacA by restrain the growth of pET32a-vacA-E.coli,but can not influence activity and gene sequence of VacA; selenium can enhance the suppression effect of recombined VacA for gastric cancer cell, depress the index of cell multiplication and the forming rate of colony, decrease the number of cell in S period, increase total of cell in G period; After purified, the recombined VacA can be identified by VacA antibody.
体外实验结果表明:一定浓度的硒作用HP后,HP菌落数量随着硒浓度的增加而减少,菌落颜色由灰白色变为砖红色,溶血现象随硒浓度的增加和作用时间的延长而逐渐消失,HP的形态由弯曲形变为球形或椭圆形,鞭毛及菌毛出现脱落现象;硒对尿素酶、过氧化氢酶、碱性磷酸酶活性无影响或影响不明显;一定浓度的硒能使表达VacA的pET32a-vacA-E.coli BL21工程菌产生脂溶性砖红色色素,颜色随硒浓度增加而加深;一定浓度的硒通过抑制pET32a-vacA-E.coli BL21工程菌的生长,减少重组VacA表达量,但不影响其空泡毒活性及编码基因序列;纯化后的VacA重组蛋白可被VacA抗体识别,具有良好的抗原性。
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Theoretical Part: Through theoretical analysis of chemothermodynamics, combustion and engineering thermodynamics, factors that affect explosion limit were determined, which include temperature, pressure, spark ignition energy, electrode shape, direction of flame propagation and size of explosion vessel.
理论部分:根据化学热力学、燃烧学和工程热力学的基础理论,从本质上定性地分析了爆炸极限的影响因素,包括温度、压力、爆炸容器的大小、点火能量大小、以及火焰传播方向等,得出了这些影响因素对爆炸极限的影响规律,以确保实验有完整的理论基础指导;在此基础上本文提出了一种新的推算在常温常压下可燃性纯质和混合工质制冷剂爆炸极限浓度的理论方法,该方法由可燃性气体的化学组成来推算上下限浓度,不需要其它条件;对混合工质制冷剂,只要再知道混合配比,即可以推算出爆炸极限,使预测爆炸极限的工作更简单、方便。
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Neither was the material properties of cortical bone in tibia between the two groups at every stage of experiment.
卵巢切除对皮质骨的影响主要表现在使骨髓腔扩大,对骨外膜的影响较小,在短期内对皮质骨的力学性能无明显影响
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ZHOUSHAN is sea area which fertility is tiptop in our country. Sea surface wind is important factor of influencing contrail of excursion oil and culturist So investigating sea surface wind of ZHOUSHAN and setting up numerical forecast model which fits this sea area can offer tool for study sea wind in this area and let us has a mensurable acquaintance ship of effect degree of physics factors which effect sea surface wind in ZHOUSHAN sea area and acquaint oneself with physic process.
而海面风是影响溢油油团漂移轨迹和养殖业的重要因素,因此,对舟山海域的海面风进行研究,建立适合此区域的数值预报模式,可为研究该区域海面风作用过程提供数值预报工具,使我们对近海区域海面风场作用中物理因子的影响程度有更定量的认识,并对物理过程和影响机制有更深刻地了解。
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A predator model with refuge and toxicity is studied. By constructing a suitable Dulac function, it is shown that there is no limit cycle in the first quadrant, thus the globally stability of the equilibrium is proved. Further more, the paper analyzes the influence of refuge, toxicity and harvesting. It is amazing that ① if the death rate of predator is big or the harvesting effort is big, the existence of the predator is unrelated with refuge; if the death rate of predator and the harvesting effort are small, and the refuge is small enough, the population of both species is increased as the increase of refuge;② if d2=0, the increase of d1 has no influence on the prey population, while the population of predator is decreased.
研究一类有避难所、毒素作用和外界捕获影响的捕食系统,通过构造恰当的Dulac函数,证明系统在第一象限没有极限环,从而证明了平衡点的全局稳定性;分析了避难所、毒素、捕获作用对该系统最终种群数量的影响,发现:①当捕食者的死亡率大或其被捕获得多时,两种群的绝灭与避难所的存在无关;当捕食者的死亡率小、被捕获得多且避难所足够小时,随着食饵避难所的增加,捕食者种群数量也随之增加;②当毒素d2=0时,毒素d1的增加对食饵种群最终数量没有影响,而使捕食者种群数量下降。
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The following points are emphasized:The operation models of adiabatic and diabatic distillation have been set up and the operation block, thermodynamics model and mathematical model in the simulation have been determined as well;(2)Based on the simulation and exergy analysis with Aspen Plus program, shortcut distillation design—DSTWU model and rigorous distillation design—RADFRAC model, the author has determined the heat duty, exergy losses and the distribution of exergy losses along the adiabatic column, which will help the simulation and optimization of the diabatic distillation;(3)Diabatic distillation under various operation conditions has been simulated by using energy balance method and exergy analysis;(4)How the different mixture and the various degree of separation, number of trays and feed location influence exergy saving in diabatic distillation have also been discussed;(5)On the basis of the total exergy losses along the column, different schema of the heat transfer distribution along the column have been compared and analyzed;they can be classified in three categories: heat duty equipartition approach, empirical approach, separation degree matching approach. In conclusion, different heat transfer distribution along the column will have effect on total exergy losses. In particular, most satisfactory results have been obtained by using separation degree matching approach. In order to diminish the exergy losses, heat transfer distribution should meet the needs of the request of separation degree.And on this premise, the author makes his suggestion in increasing the proportion of heat supplied to the tray with minimum exergy losses and decreasing the proportion of heat supplied to the tray with the maximum exergy losses.
本文对透热精馏过程进行了模拟并对其节能效果的影响因素做了较为全面的分析和深入的研究,主要研究内容如下:(1)建立了常规精馏和透热精馏过程的模拟操作模块、热力学模型以及数学模型;(2)利用化工模拟软件Aspen Plus并分别采用DSTWU简捷模型和RADFRAC严格计算模型对常规精馏进行模拟计算和有效能分析,确定常规精馏塔的公用工程热负荷、有效能损失及有效能损失在塔内的分布,为透热精馏的模拟和优化提供数据参考;(3)对不同物系在不同分离度条件下进行透热精馏的模拟,分别采用能量衡算法和有效能分析法进行计算和分析;(4)探讨了各种因素如物系的选择、不同分离度、塔板数、进料位置对透热精馏节能效果的影响;(5)以全塔总有效能损失为比较基准,对热量在塔内的三种分布方案即热负荷平均分配法、经验法和分离度匹配法进行了对比分析并得出结论:塔内热量的不同分布方案对于全塔总有效能损失会产生影响,其中以分离度匹配法的节能效果最为理想,为减少有效能的损失,应使塔内的热量分布满足各塔板的分离度要求,并在此前提下,尽量减小有效能损失大的塔板的热负荷和增加有效能损失小的塔板的热负荷。
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Then again, with the aid of a multi period game model, the passage give the social welfare effects in firm's horizontal merger under open economy a dynamic analysis. In this way, no only the results are more systemic and more general, but also it can show the difference of the social welfare effects in short run and in long run of merger. In addition, it shows the potential conflict between governments and firms in dynamic condition.
其次,鉴于技术发展、产业变迁所产生的动态影响,本文运用多阶段博弈模型对企业兼并的社会福利影响给予了动态的分析,这样不仅使研究成果更加系统和客观,也反映了企业兼并对企业利润和社会福利的影响在短期与长期考察存在的差异,并揭示了动态条件下可能存在于政府和企业之间的利益冲突。
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The modulator could make different effect on fermentation, kerosene and triton-XlOO has little effect on fermentation, but span-20 and J3 -ionone could enhance the productivity of J3 -carotene, significantly. The content of 3 -carotene in the medium reach 2~3 times of the control experiments by adding Ig/L span-20.The effect of the mycelial morphology on producing 3 -carotene of Blakeslea tripora was also investigated.
在研究前体物和促进剂对p一胡萝卜素生产影响时发现:复合前体物添加可以提高产率到2.4倍;研究了不同小分子效应物对三抱布拉氏霉菌合成p一胡萝卜素的影响,结果表明:煤油、trinton一X 100对菌体中p一胡萝卜素含量影响较小,sPan一20可以提高卜胡萝卜素的产量,其中添加sPan一20可使p一胡萝卜素产量提高到2一3倍。
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Different biases can result in the opposite phase shifts of the impedance with respect to the applied signal. Neutral gas pressure affects the magnitude of the impedance, but does not change the shape of the frequency response curve. In addition, the position of the grid inside the vacuum chamber has little effect on the impedance.
结果显示栅网上的直流偏压对阻抗的影响很大,不同偏压可以使阻抗的频率响应反位相,气压对阻抗的大小有明显影响,但一般不改变频率响应曲线的形状,栅网的位置对阻抗几乎无影响。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力