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Therefore, the moist potential vorticity analysis associated with the mesoscale convective system was researched in the paper, so as to reveal the moist potential characteristics of mesoscale convective system in typhoon circulation. The results showed that, during the generation stage, convective instability characterized by MPV1 was a favorable condition for forming MCS, while the vorticity which was caused by the slantwise isentropic surface and the vertical shear of the horizontal wind characterized by MPV2 was an inspiring mechanism. The specific process was that, the atmosphere exhibited the feature of strong convective instability at the low level of convection areas and the southeast areas, which included plenty of erratic energy. The slantwise ascended the stream transfer the erratic energy to northwest, where the stratification stability was small. As decreased, the cyclonic vorticity increased. On the other hand, the vorticity caused by the slantwise isentropic surface and the vertical shear of the horizontal wind inspired the release of convective instability and as a result that the MCS formed. During the development stage, the cyclonic vorticity increased quickly with the persistent decreasing of . Meanwhile, the inclination of isentropic linewas bigger than the absolute momentum line at middle level, which exhibited the feature of conditional symmetric instability , then the conditional symmetric instability was forced to release by the vorticity resulted from the slantwise isentropic surface and the vertical shear of horizontal wind, and the MCS developed.

结果表明，在对流形成阶段，MPV1即对流不稳定为MCS的形成提供背景不稳定条件，由MPV2即湿等熵面的倾斜和水平风的垂直切变而引起的涡旋发展作为强迫机制：MCS形成的区域及东南区域中低层是强对流不稳定层，蕴含丰富的不稳定能量，倾斜上升运动把对流不稳定区具有强不稳定能量的暖湿空气向西北中层的中性层结区输送，由于的减小，气旋性涡度增强，有利于形成对流，另一方面，由于湿等熵面倾斜和低空急流加强而引起的涡旋发展作为一种强迫机制激发对流不稳定能量得到释放，从而形成对流；在对流系统地发展阶段，由于低层的对流不稳定性进一步减弱，进一步减小，气旋性涡度进一步增强，有利于MCS的增强，中层等θe 线的倾斜度比绝对动量M 等值线的倾斜度大，对应有条件对称不稳定区域，满足条件对称不稳定条件，在湿等熵面倾斜和台风低空急流作用下引起的涡旋发展强迫对称不稳定能量释放，从而使得对流得以维持和加强。

The paper introduces some researches, such as a new method to calculate the added mass for the seismic analysis of the fuel assembly in fast breeder reactor, simulation on the vortex shedding of double heat exchange tubes in a steam generator, simulation on the vortex shedding caused by the cross -flow over plates in a fuel assembly of an advanced reactor, the research on the impacting phenomenon of the free-surface on the vessel head in a storage tank as the main vessel of the China Experimental Fast Reactor shaken by the earthquake, and the researches on the solution of the liquid sloshing by moving particle semi-implicit and the scattering phenomenon caused by sloshing, and so on.

本文介绍华北电力大学在该方面的一些研究进展，例如，快堆燃料组件抗震分析新的流体附加质量计算方法研究；蒸汽发生器换热管双管漩涡脱落的数值模拟；一个先进堆燃料组件平行板上流动引起的漩涡脱落数值模拟；由地震引起的自由表面对快堆主容器冲击现象的研究；移动粒子法求解液面晃动及晃动引起离散现象的研究等。

The Scientism caused an educational revolution in China, and forced China to turn our educational idea from "cultivate one's morality and character" to "specialist education", our educational content from inanition and inutility to practicality, our educational manner from closing to open, our pedagogy from nonexistence to existence, our educational study from roughness to fine.

在我国引起了一场教育革命，促使我国在教育观念上由"修身养性"转向"专才教育"，在教学内容上由空疏转向实用，在教育方式上由封闭转向开放，在教学论上由无到有，在教育研究上由粗旷转向精细。

In order to measure the radiation dosimetry by heavy ions which entered the Shen-Zhou shuttles, a solid state nuclear track detector CR-39 was installed in the inner wall of SZ recoverers.

为了测量在神舟飞船返回舱内由空间重电离粒子引起的辐射剂量，采用了固体核径迹探测器CR39来测量飞船飞行期间，返回舱内由重电离粒子引起的能量沉积。

The latedischarges decreased from 9.29 ± 0.97 to 6.71 ± 0.68 with the A-fiberconditioning stimulus increasing from 1 to 5 (n〓8, P〓0. 05).(7) The intervalbetween the conditioning stimulus and test stimulus (C-T interval) wasincreasing, the inhibition tended to plateau off. At shorter time intervalsthe inhibition became more effective. When C-T interval was limited in 50ms,the inhibitory effects was the strongest, here, the late discharges reducedfrom 12.57±1.21to 2.29±0.42 (n=11, P＜0. 01).(8) Behavior research showedthat the rat model of snake venom exhibited neuropathic pain with heathyperalgesia, cold and mechanical allodynia, which corresponding to the acuteelectrophysiological findings.

此时轻刷WDR神经元的感受野不能引起其活动改变，但伤害性齿镊夹捏仍可引起WDR神经元放电增多；〓5〓晚成分放电的潜伏期缩短，即宁静期的时程变短，由给蛇毒前的118.83〓3.67ms降至50.72〓1.36ms〓n〓32，P〓0.01〓；〓6〓在正常动物，如果预先给予只激活A纤维的弱条件电刺激〓mA，100μs〓可抑制随后的伤害性检验刺激所诱发的WDR神经元的晚成分放电，当条件刺激个数从1增加至5时，每次伤害性检验刺激所诱发的晚成分放电数从9.29〓0.97个降至6.71〓0.68个〓n〓8，P〓0.05〓；〓7〓固定条件刺激数为1个，当条件刺激与检验刺激之间的间隔增大时，A纤维条件刺激对WDR神经元晚成分放电的抑制作用逐渐减弱，当条件刺激与检验刺激之间的间隔在50 ms以内时，抑制效应最为显著，此时，晚成分放电数由正常时的12.57〓1.21个降至2.29〓0.42个〓n〓11，P〓0.01〓；〓8〓与急性研究中的WDR神经元电活动的变化结果相匹配，利用蛇毒制备的大鼠模型在行为学上表现为热痛觉过敏、冷觉的痛性感觉异常及机械痛觉过敏等慢性痛症状。

At the same time, most WDR neurons failedto respond to the light brush applied to the receptive fields, but they couldbe intensively excited by the noxious pinch.(5) The latency of the latedischarges was shortened from 118.83 ± 3.67ms to 50.72 ± 1.36ms (n〓32, P〓0. 01).(6) Preceding graded number of A〓fiber conditioning inputs (〓mA, 100 μs) delayed the C-activity evoked by the following nociceptive teststimulus activating both A- and C-fiber applied to the sciatic nerve. The latedischarges decreased from 9.29 ± 0.97 to 6.71 ± 0.68 with the A-fiberconditioning stimulus increasing from 1 to 5 (n〓8, P〓0. 05).(7) The intervalbetween the conditioning stimulus and test stimulus (C-T interval) wasincreasing, the inhibition tended to plateau off. At shorter time intervalsthe inhibition became more effective. When C-T interval was limited in 50ms,the inhibitory effects was the strongest, here, the late discharges reducedfrom 12.57±1.21to 2.29±0.42 (n=11, P＜0. 01).(8) Behavior research showedthat the rat model of snake venom exhibited neuropathic pain with heathyperalgesia, cold and mechanical allodynia, which corresponding to the acuteelectrophysiological findings.

此时轻刷WDR神经元的感受野不能引起其活动改变，但伤害性齿镊夹捏仍可引起WDR神经元放电增多；〓5〓晚成分放电的潜伏期缩短，即宁静期的时程变短，由给蛇毒前的118.83〓3.67ms降至50.72〓1.36ms〓n〓32，P〓0.01〓；〓6〓在正常动物，如果预先给予只激活A纤维的弱条件电刺激〓mA，100μs〓可抑制随后的伤害性检验刺激所诱发的WDR神经元的晚成分放电，当条件刺激个数从1增加至5时，每次伤害性检验刺激所诱发的晚成分放电数从9.29〓0.97个降至6.71〓0.68个〓n〓8，P〓0.05〓；〓7〓固定条件刺激数为1个，当条件刺激与检验刺激之间的间隔增大时，A纤维条件刺激对WDR神经元晚成分放电的抑制作用逐渐减弱，当条件刺激与检验刺激之间的间隔在50 ms以内时，抑制效应最为显著，此时，晚成分放电数由正常时的12.57〓1.21个降至2.29〓0.42个〓n〓11，P〓0.01〓；〓8〓与急性研究中的WDR神经元电活动的变化结果相匹配，利用蛇毒制备的大鼠模型在行为学上表现为热痛觉过敏、冷觉的痛性感觉异常及机械痛觉过敏等慢性痛症状。

According to present achievement, when subsidiary stress caused by distributed load is less than 20 percent of static lateral pressure induced by gravitation, distributed load's effect may be ignored. Therefore, the expression of topograpthy influence depth on self-weight stress field is obtained.

已有研究成果表明，当由外载引起的附加应力小于由重力引起的静止侧压力的20%时，则可以不考虑外载的影响，这样便导出了地形对自重应力影响深度所满足的函数关系式。

The most important cause in dogs is by a Chiari I malformation, which is when an underdeveloped occipital bone interferes with spinal fluid circulation and results in fluid accumulation in the cervical spinal cord.

引起犬类脊髓空洞症主要是由ChiariI畸形引起的。ChiariI畸形由发育不良的枕骨干扰脊髓液循环并导致颈髓积液。

The onset of symptoms is 5 to 9 days after tick attachment, and include incoordination progressing to paralysis, changed voice, and difficulty eating.

在北美，该疾病主要由革蜱属的蜱引起，而在澳大利亚则主要由硬蜱属的蜱引起。

Cloudy water in the aquarium is caused by a bacteria bloom, while green water is an algae bloom.

水族馆里的混浊水质是由细菌繁殖引起的，而绿色的水是由藻类繁殖引起的。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。