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在飞行中

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If you're in an aerobatics airplane or you're doing aerial-combat maneuvers in a jet fighter or you're sailing a boat in an important race, you really don't think about the problems back at the office.

如果你驾驶一架特技飞行飞机,或驾驶一架喷气战斗机在空中作各种特技动作,或者在一场重要的比赛中驾驶一艘小船航行,你就会完全忘记工作中的烦恼。

Even people on Earth are exposed to cosmic radiation, but the amount is negligible.

大型太阳风暴产生时,不在地球大气保护中的太空人就会暴露在致命剂量的辐射下,搭乘商用客机飞行在高纬区的人们也会暴露在较高的辐射中,即使是在地球上的人们也是暴露在宇宙辐射中,只不过这些辐射量已经是微不足道的。

A scheme was presented to transmit 272 signals between time of flight counter electronics and trigger electronics in Beijing Spectrometer Ⅲ, using the chipset of serializer/deserializer and optical transceiver, achieving reliable long-distance transmission with only minute error rate.

在北京谱仪改造中,提出了使用并串/串并转换的方式通过光纤传输272路飞行时间计数器电子学信号给触发系统的方案,实现了误码率极小的可靠性长距离传输,并且验证了光纤传输在高密度信号远距离传输中的传输可靠性。

At the early iteratives, the mutation rate is bigger and the aim is to make particles to explore smaller and isolate region and to avoid the algorithm trapping to the local optimum. While the algorithm runs, the mutation rate will be decreased to reduce the disturbing to the particles. IPSO adopts a new method that congregates some neighboring individuals to form multiple sub-populations in order to lead particles to explore new search space. Additionally, our algorithm incorporates a mechanism with a simple and easy penalty function based on the largest distance between the particle and the boundary of the feasible region to handle constraint.

IPSO采用了一种新型的变异策略,变异概率随着算法的运行是动态变化的:在算法运行初期,变异概率大,其目的是使算法不但能够探测到目标空间中的孤立区域,而且避免搜索陷入局部极值;在算法运行后期,变异概率逐渐变小,以减少对粒子的扰动;算法通过将部分具有邻近距离的粒子聚集成核形成多子群引导种群中粒子的飞行;采用一个简单的基于粒子与可行域边界最远距离的罚函数处理约束的机制,使得算法高效实现。

This is reflected in the origin of the name (after the television series Monty Python's Flying Circus), in the common practice of using Monty Python references in example code, and in an occasionally playful approach to tutorials and reference materials.

这反映在Python的名字的由来上(由Monty Python的飞行马戏团的系列电视节目命名),也反映在示例代码中使用Monty Python上,也反映在入门和参考材料中偶尔出现的玩笑式的方法上。

It is shown that maximum temperature value of the field's will rise while the Mach number increases. After the Mach number exceeds one, a clear bowshock is obtained in the simulation result, and the Mach angle decreases along with the Mach number. Those are consistent with theoretical results. While the Mach number is 3.5, even the radome inside is adiabatic, the maximum temperature is below 1000K. So the CVD diamond thick film radome can meet practical requirement of flight at 3.5 Mach number.

研究发现,随着马赫数的增加,温度场中最大温度值也随之增大;在马赫数大于1时,会产生明显的弓形激波,且激波的锥角随马赫数增加而减小,这与理论结果相一致;当马赫数为3.5时,即使在头罩内壁绝热条件下,温度场中最高温度值也在1000K以下,表明CVD金刚石厚膜可以满足Ma=3.5的实际飞行要求。

SUMMARY In 21 century, all corporations in the world compete and develop in an environment of more merciful and uncertain and murkiness. Theory of strategy management and a lot of corporations sample thoroughly prove that a corporation lack of strategy just as a plane in bad weather, which will lose its direction probably.

进入21世纪以来,各个企业越来越在动荡、多变、不确定和混沌的环境中运作、竞争,战略管理理论和大量实践证明一个没有战略的企业,如同在险恶气候中飞行的飞机,随时可能迷失方向。

Periodic fluid pulsation in aeroplane hydraulic piping could induce fluid-construction vibration and lead to fatigue damage. It is impossible to find the error sensor's optimization location because of the pressure standing wave, and the pulsation attenuation effect is not perfect when adopting pulsation attenuation at single point. For this reason, a distributed active control method of fluid pulsation was presented. To avoid stationary point in all aviation states, several fluid pulsation actuators and error pressure sensors were placed along the piping. The second fluid pulsation produced by actuators can counteract the primary pulsation brought by aviation piston pump and make the mean pulsation of whole piping minimum when adopting adaptive feed- forward control and the filtered-X least mean square algorithm.

针对飞机液压能源管路系统中的周期性流体脉动诱发流固耦合振动,导致管路疲劳损伤的问题,针对管路中存在压力驻波特性,在采用单点消振时寻找误差传感器最佳布局位置困难而引起脉动抑制效果不理想的缺点,提出了一种分布式流体脉动主动控制方法,即沿管路不同位置布置多个主动消振阀和误差压力传感器,在任意飞行阶段,避开压力驻波点,以误差压力传感器的脉动测量值为控制目标,采用一种针对周期脉动主动控制的自适应前馈控制法和多通道自适应滤波-X LMS算法,调整控制器参数,使主动消振器产生的次级脉动与管路中的初始脉动相互抵消,达到整个管路中的平均流体脉动最小的效果。

Contact found in 80 works will impose upon space and the norm of thinking seems to exist faults and barriers, ahead of fashion conscious consumers continue to derive more imaginative ideas to make their work a kind of weightlessness a sense of unconscious, self-desire expansion and to meet the Gengrang has become such a vague sense of, when hidden, at times, a lot of 80, after describing himself as an artist is not weight of objects, flying freely in the air, floating, this subjective state of consciousness driven by the description of means that the objective mental states, disorders and emptiness, extreme inflation and a good self-concept of a serious departure from the idealism and sense of reality, greatly outstrips reality, a feeling based on fantasy or fantasy thinking.

在我们接触的作品中会无形中发现80后的思维空间与常态似乎存在着断层和隔阂,超前时尚的消费意识不断派生出更有想象力的观念使他们的作品有种无意识的失重感,自我欲望的膨胀和满足更让这样的意识变得虚无飘渺、时隐时现,很多80后艺术家将自己描述成没有重量的物体,在空中自由自在的飞行、飘浮,这种主观意识状态驱使下的描述,意味着客观精神状态的失常和空虚,极度膨胀和自我良好的唯心意识观严重背离了现实,凌驾于现实之上的感觉建立在空想或幻想的思维中。

The effect of the flight on the activities of energy metabolism related enzymes in the flight muscles of the Oriental armyworm moth, Mythimna separata females was studied. These enzymes measured were glyceraldehydes-phosphate dehydrogenase, glycerol-3-phosphate dehydrogenase, lactate dehydrogenase, and 3-hydroxyacyl-CoA dehydrogenase. In the first 5 min of the tethered-flight of 3 day-old moth, activities of all the enzymes related to carbohydrate and lipid metabulistu increased rapidly, enzymes related to lipid metabolism were completely activated, and the activities of HOAD were significantly strengthened. But in flight duration from 5th to 60th min, the activities of all energy metabolism related enzymes decreased, suggesting that the flight was going to be stabilized.

对3日龄粘虫雌蛾吊飞过程中4种相关酶3-羟酰辅酶A脱氢酶、3-磷酸甘油醛脱氢酶、3-磷酸甘油脱氢酶和乳酸脱氢酶的研究结果表明,在室内条件下,粘虫在吊飞过程中其能量代谢有以下特点:在吊飞的初始5min,所有与糖代谢和脂肪代谢相关的酶活性都快速升高,这段时期脂肪代谢的酶活性也完全被活化,HOAD活性明显增强;但在随后的5~60min持续吊飞期间与能量代谢有关的酶活性都有所下降,表明此时飞行活性趋于平稳。

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According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。

When I was in school, the rabbi explained everythingin the Bible two different ways.

当我上学的时候,老师解释《圣经》用两种不同的方法。