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The outflow fields of a simplified fastback car were studied with numerical methods of different turbulence models and diflerent discretization scheme s with the CFD code STARCD.
以简化的直背式轿车模型为研究对象,以商用计算流体力学软件STAR-CD为工具,应用不同的湍流模型和离散格式对轿车外流场进行了数值模拟,通过与试验结果的对比,研究了湍流模型和离散格式对直背式轿车外流场数值计算精度的影响,同时对SIMPLE算法及其两种修正方法PISO和SIMPISO算法的计算精度进行了比较。
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It isverified that the method for using little deformation condition was true with accurate solution of three-piece straightening curve.
文摘:基于三段矫直曲线应变速率的假设,通过计算三段矫直曲线的精确解,验证了使用小变形条件的正确性;考虑高温铸坯蠕变性能,对铸坯的力学行为进行了分析,得出了使用三段矫直曲线方法,铸坯应变速率、应力及应变在矫直区内变化较为平缓,可有效避免铸坯内裂纹的形成;使用本文三段矫直曲线精确解,调整辊列位置,可进行连铸机的在线技术改造。
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It isverified that the method for using little deformation condition was true with accurate solution of threepiece straightening curve.
文摘:三段矫直曲线应变速率的假设,通过计算三段矫直曲线的精确解,验证了使用小变形条件的正确性;考虑高温铸坯蠕变性能,对铸坯的力学行为进行了分析,得出了使用三段矫直曲线方法,铸坯应变速率、应力及应变在矫直区内变化较为平缓,可有效避免铸坯内裂纹的形成;使用本文三段矫直曲线精确解,调整辊列位置,可进行连铸机的在线技术改造。
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This thesis analyzes the types and art trait of solar-assisted heat pump water heater, the development trend of direct expansion solar-assisted heat pump water heater, makes a summary of these research results from six aspects. On the basis of these works and from the point of view of receiving optimum solar radiation , the thesis develops a novel design model of direct expansion solar-assisted heat pump water heater with a truncated cone collector/evaporator, theoretically analyzes the heat that the system can absorb, compares its ability with other two types of cylinder and flat plate ones, and calculates COP and EER with computer aids. The results show that a truncated cone direct expansion solar-assisted heat pump water heater can absorb not only more solar energy but heat energy in air. It takes on favorable thermal performance. Under the average day in February which is of the worst weather throughout the year in Kunming, the COP is about 4. 2, EER is about 2.9 . The heat absorbed by the system are more than those of the other systems. The system is very great in terms of saving
本文分析研究了太阳能热泵热水系统的分类及技术特点,直膨式太阳能热泵技术国内外发展趋势,从六个方面对直膨式太阳能热泵热水系统的研究进行了归纳总结;在此基础之上,从太阳辐射的最佳接收考虑,提出了集热器/蒸发器为圆台侧面的圆台型直膨式太阳能热泵热水器的设计模型,理论上分析了这种热水系统所接收的太阳辐射和得热量,并与圆柱型、平板型的直膨式太阳能热泵热水系统进行对比分析,通过计算机辅助模拟计算出:系统不但可以有效地吸收太阳能,还能有效地吸收空气中的热量,具有良好的热性能;在昆明,以2月为代表的冬季,其太阳辐照较低,系统的制热系数COP值也能达到4.2,效能比EER值为2.9;系统的得热量高出圆柱型、平板型的直膨式太阳能热泵热水系统,节能效果明显。
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On the other hand, the influence of Absurd drama manifested mainly in the perspective of observing the world in later plays. Absurd drama reveals the uncertainty of the world by the skill of"simile way". Contemporary playwrights draw extensively and broadened the use of"simile way", and create the new simile symbols: anti-classic simile, anti-system simile and anti-meaning simile. At the same time they use a comprehensive simile to create a kind of sensual drama.Absurd drama also destroys the language function of traditional drama by rupture and desegregation, also tends to use "the language of no meaning," to reflect the world's essence. The contemporary generation create a physical theatre to expulse of the role of language. Another extreme is to strengthen language function thus creating a language game.
另一方面,荒诞派戏剧的影响力主要体现在后世剧作对客观世界的认知上:荒诞派通过&直喻&的手法来表现世界不确定性的本质,被后世剧作家广泛借鉴并且拓宽了直喻手法的使用,出现了反经典、反系统和反深度的直喻符号,同时另一个极端则是用剧场性的全面直喻创造了具有震撼力的感官戏剧;荒诞派通过破裂与解体的方法化解了传统戏剧的语言功能,更倾向于用&无义的语言&表达来体现世界的无义,后世剧作家在此基础上索性彻底驱逐了语言的作用从而创造了肢体戏剧,另一个极端则是强化语言功能创造了&语言游戏&。
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Based on the analysis for the moving process of the spade of the straight-spade-typed tree transplanter and the forced state by applying basic theory and studying methods of the soil-machine system mechanics, mathematical models have been derived for calculating the spading resistance.
本文通过对直铲或树木移植机铲刀下铲过程及受力状况的分析,应用土壤—机器系统力学的基本理论和基本研究方法,建立了该铲下铲阻力的数学模型,并由此提出了减小其下铲阻力的方法和措施。
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Furthermore, the performance of half right circular corner filleted flexure hinge was analyzed, including the effect of its geometric parameters on its performance. Compared with symmetrical right circular corner filleted flexure hinge, the compliance and sensitivity to the load of half right circular corner filleted flexure hinge were better than those of symmetric right circular corner filleted flexure hinge. The above results provide a new idea for the applications of flexure hinge, which is used in compact structure and structure with large displacement.
同时对单边直圆导角复合柔性铰链的性能进行分析,分析了结构参数对其柔度性能的影响,通过与双边直圆导角复合柔性铰链比较,得出了单边直圆导角复合柔性铰链的转动能力、对载荷的敏感性均优于双边直圆导角复合柔性铰链,为柔性铰链在结构紧凑、大位移场合的工程应用提供了新的思路。
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Physical models of fragment discharge process are established and the fragment discharge law is discussed by the rational simplification of parallel- cut blasting process in this paper.
通过对直眼掏槽爆破过程的合理简化,建立了排碴过程的物理模型,研究了排碴规律,并通过实例对其合理性进行了验证。
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It was tempting to call this article "On the Armageddon Freeway"- straight through, no diversions.
这是诱人的呼吁,这条&对恶劣的高速公路&-直通过,没有改道。
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These results show that the choice of pole number and slot number has a significant effect on the performance and the proper choice of the pole-slot number combination and pole embrace can weaken the effect of output voltage harmonics and reduce usage of magnet material,as well as save cost,which are helpful to obtain the better performance.
结果表明:极槽匹配对直驱式风力永磁发电机性能有很大影响;通过合理选择极数、槽数以及极弧系数,可以减少输出电压谐波分量的影响,降低永磁材料的使用,节省成本,有助于直驱式风力永磁发电机获得良好的性能。
- 更多网络解释与对直通过相关的网络解释 [注:此内容来源于网络,仅供参考]
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cut across:抄近路穿过,对直通过
cure sb. of 治愈某人的疾病 | cut across 抄近路穿过,对直通过 | cut back 修剪(树枝等);削减
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Alignment:对准
电弧融接法是最常用应用最多的方法. 仪器一般包括四个部分:光纤的准直与加紧机构,光纤的对准机构,电弧放电机构,电弧放电和电机驱动的控制机构. 要求通过预习和实验,对各部分有深入的了解和认识. 准直(collimating)与对准(alignment)部件非常精密,严禁用手触摸,保持距离.
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cure sb.of:治愈某人的疾病
cry out 大声呼喊;大声抱怨 | cure sb. of 治愈某人的疾病 | cut across 抄近路穿过,对直通过
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deformation:变形
野兽主义作家们,对眼所看到的形象描写极度排斥,那好似以心为限,即是说对诉诸画家感情的东西,只以素直和大胆的表现,因此这种所表现的现象,是已通过了感情的三棱角,在我们视觉上所得到的形象显着的是"变形"(Deformation)了.
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directly:直接地
规则最终的通过确立了欧盟新的统一国际破产法制度,根据其第47条之规定,该规则自2002年5月31日起对各成员国生效(丹麦除外,因其在欧盟有关公约的议定书中对内务司法合作事项表示不予参加),并且是完整地(entirely)与直接地(directly)在成员国境内执行.
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entirely:完整地
规则最终的通过确立了欧盟新的统一国际破产法制度,根据其第47条之规定,该规则自2002年5月31日起对各成员国生效(丹麦除外,因其在欧盟有关公约的议定书中对内务司法合作事项表示不予参加),并且是完整地(entirely)与直接地(dire
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floating body:浮体
fUti浮体(floating body)飘浮于液体表面的物体. 浮体一方面受到重力的作用,同时又受到周围液体对它的作用力. 液体对浮体的作用力的合力称为浮力. 浮力的方向是竖直向上的,大小等于被物体排开的液体的重量,作用线通过排开液体体积的形心,
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gravitational force:吸引力
但是爱因斯坦发现相对论以后,却说因为有地心吸引力(Gravitational Force)等的影响,光线会弯曲,而不一定是直的. 爱因斯坦发表了这个理论后,有些人不能接受,因为他是用数学证明出来的. 但是后来通过观察星辰的运转证明了他的理论是对的.
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military training:军训
你们年级的学生开始接受为期一周的军训(military training),天气很冷. 你们全力按军训要求去做,汗水直淌,也顾不得去擦,你们的军训排长(platoon leader)是一位20岁的年轻人. 他对你们要求严格. 通过交谈,你们不仅了解了部队生活情况,
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ome out:发表,出版;出现,显露;结果是
come on [表示鼓励、催促等]快,走吧;开始,发生;进步,进展 | ome out 发表,出版;出现,显露;结果是 | cut across 抄近路穿过,对直通过