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The results show that the flow stress decreases with increasing deforming temperature and increases with increasing strain rate. The flow stress of the alloy during hot compression deformation can be described by constitutive equation in hyperbolic sine function with a hot deformation activation energy of 196.27 kJ/mol. Partial recystallization takes place in the alloys deformed at a high temperature or at a low strain rate, and large number of dislocations and subgrains are observed in the alloy. The elongated grains observed in the samples coarsen with increasing temperature and decreasing strain rate. Correspondingly, the subgrain size increases and the dislocation density decreases. The main soften mechanism of the alloy transforms from dynamic recovery to dynamic recrystallization.

结果表明：Al-Cu-Mg-Ag耐热铝合金在热压缩变形中的流变应力随着温度的升高而减小，随着应变速率的增大而增大；该合金的热压缩变形流变应力行为可用双曲正弦形式的本构方程来描述，其变形激活能为196.27kJ/mol；在变形温度较高或应变速率较低的合金中发生部分再结晶，并且在合金组织中存在大量的位错和亚晶；随着温度的升高和应变速率的降低，合金中拉长的晶粒发生粗化，亚晶尺寸增大，位错密度减小，合金的主要软化机制逐步由动态回复转变为动态再结晶。

A transfer-matrix method is used to study cylindrical wave reflection at cylindrical media interfaces. We find that the reflection can be total at an interface of small radius but is only partial if the radius is large.

应用转移矩阵法研究柱面介质内表面处柱面波的反射，发现在小半径内表面上的反射为全反射，当半径较大时，它只是部分反射。

Supporting type is suggested to be developed into 3-prop to improve adaptability besides 2-prop and 4-prop. The difference of caving difficulty degree of coal seam is the base of caving coal method at high, medium and low position. Caving with small step and open caving flashboard used widely not only cause serious mixture of coal and rock but also hinder the improvement of top coal recovery. So we suggest caving with large step or closing caving door. Four-bar-mechanism of hydraulic support restricts development of new style caving powered support. Stabilization framework of expansion link and all-shield caving tail beam at high, medium and low position are introduced here.

支架支护型式，除了两柱、四柱以外，建议开发三柱支架以改善适应性；煤层冒放性的差异，是高位、中位和低位放煤方法存在和使用的依据；目前广泛采用的小步距放煤和开放式放煤插板不仅造成严重混矸漏矸，也妨碍顶煤回收率的进一步提高，建议采用大步距放煤和可关闭放煤口；液压支架四连杆稳定机构，制约了新型放顶煤液压支架的开发，介绍了液压支架伸缩杆稳定机构及全掩护拖移高位、中位和低位放煤尾梁。

The deformation mechanism is mainly the single-slip and cross-ship, the fracture mechanism is mainly the congregation of transgranular micro-hole, and large uniform deformation occurred before tough fracture, and therefore, the ability of plastic deformation and the mechanical properties of the material were remarkably improved. These fully indicate that the new melt-treatment developed in this work is an effective and advanced technique, and further testify that the improvement of metallurgical quality of the material is the key to enhance its mechanical properties, especially its plastic deformation performance. The results of tensile and compression tests at elevated temperature also indicate that the suitable hot-working temperature range is 400～450℃. 4. A steady-state plastic flow exists during the plastic deformation of the aluminum sheet used for pressure can at elevated temperature. A hyperbolic sine relationship can be satisfied between the steady-state flow stress and strain rate by introducing an Arrhenius term which involves some thermal activation parameters, i.

压力罐用铝材中的主要冶金缺陷为Al〓O〓夹杂物、气孔及富Fe杂质相；高效熔体处理显著改善了材料的冶金缺陷的存在形态，使含杂量明显减少、夹杂物尺寸变细小且分布均匀，富Fe杂质相变为细小、分布均匀的团球状或短棒状的复杂化合物，同时也明显细化了结晶组织；此外，由于高效熔体处理有效地减少了材料中裂纹萌生源数量，因而改变了材料的塑性变形微观过程及断裂方式，主要以单滑移和交滑移进行塑性变形，断裂方式为穿晶微孔聚集型，韧性断裂前产生了大量的均匀变形，不易出现变形失稳，从而显著提高了罐用铝材的塑变能力和力学性能。

While under Port Columbus International airport civilian radar approach control at 15 miles out and descending through 8,000 feet I was given permission to vector 30 degrees right to investigate what appeared to be a 2nd sun about 2/3 the size of a football field parked on the back side of a large cumulous cloud at about 4,000 feet and 5 miles NNW of the airport.

当在哥伦布港口国际机场民用雷达15英里作用半径外和慢慢通过8，000英尺我得到无线电许可要求向右转30度去调查在飞机场的4，000英尺和5英里NNW的大约是2/3足球场大小大积云状的云层后面停留的第二个太阳。

This essay analyzes the method and procedure of ice-making recorded in Huai Nan Wan Bi Shu, and creatively proposes that the principle of "ice-making in summer" is refrigeration through the quick evaporation of water to absorb heat under low pressure, and that ice is made on the fine silk at the mouth of an urn, but not inside the urn at its bottom as it was conventionally thought. The essay points out three necessary conditions which should be fulfilled in order to realize "making ice in summer": low relative humidity (less than 26%), large volume of the urn (about 100 L) and proper air temperature (about 20℃).

分析《淮南万毕术》所载制冰方法和过程，提出低压下水快速蒸发吸热制冷是"夏造冰"的制冰原理；结冰的部位不是传统观点所认为的瓮底，而是在瓮口的嫌上；指出要实现"夏造冰"，需满足三个条件：相对湿度低（低于26%）、瓮的容积大（100升左右）、空气的温度适当（20℃左右）。

At the same time, in Scotland, Wales, Ireland and large areas of France, English rule was expressed, if at all, through a mixture of scattered garrisons and semi-independent vassals whose obedience had to be continually refreshed by injections of cash and reminders of royal power.

同时，在苏格兰，威尔士，爱尔兰和法国的广大地区，英国统治的体现，如果能全部体现的话，是分散的堡垒和半独立封地的混合体，那些封地的顺从需要不断拿钱和王权势力的提醒者去刺激。

Four testing methods to detect the pollen viability of cucumber were being compared. The results indicated that I-KI staining method and acetic red dyeing were not suitable to judge the pollen viability of cucumber. Tetrazolium method can be used but the error is oversize. By and large, the Germination in vitro method was an efficient, stable and simple way to judge the pollen viability of cucumber. The component of culture medium is 10% sucrose+ 100mg/L H_3BO_3. If inoculated intraday, collect pollen of fresh abloom flower at 6:00 and if inoculated at the second day, collect before dark.

比较了4种常用的花粉活力测定方法——I-KI染色法、醋酸洋红染色法、TTC染色法和离体萌发法，认为I-KI染色法和醋酸洋红染色法不适于测定黄瓜花粉生活力，TTC染色法虽适用但误差较大，综合考虑各项因素，确定离体萌发法是最准确、简便、稳定的测定黄瓜花粉活力的方法。

The fEPSP response evoked in one pathway was small, usually 20–30% of the maximu, whereas a large response, usually 80–90% of the maximum, was evoked in the strong pathway. After recording of the baseline fEPSP evoked at 0.033 Hz, LTP of the weak pathway could be associatively induced by paired stimulation of the weak and strong pathways 100 times at 6 sec intervals, with stimulation of the weak pathway preceded 3–10 msec.

在记录以0.033Hz所引发基础的兴奋性突触后电位之后，在弱的路径上可以因配合弱与强的刺激路径而引发出相关性长期增益（每六秒一次共100次，弱的刺激路径在强的刺激路径之前 3-10 ms），然而当在两个路径之间的配合时间差大於10 ms时即无法形成相关性长期增益，此类型长期增益的引发是需要依赖活化NMDA接受器的，因为给予50 mM的D，L-AP5可以阻断相关性长期增益的引发（兴奋性突触后电位为原来的105±6﹪；n=6）。

The introduction combines traditional Chinese and Western medicine below the experience of enteritis of noxiousness of fine ailment of remedial Tibet mastiff, in order to offer reference. 1 hair sick condition and clinical expression ill dog are 2~4 month more age young dog, majority is come on suddenly, anorexia or abandon absolutely, mental depressed, systemic symptom worsens quickly, produce acuteness sex vomiting and diarrhoea, puke is first feed rotten, afterwards is yellow or olive bubble mucus and hematic type thing, have diarrhoea dung has the sticky stiff thing of grey yellow, turn after for rare dung of effluvial shape of embedded mucous membrane, then shows hematic dysentery, because ill dog is acuteness vomiting and diarrhoea are rapid dehydration, eyeball cave in, temperature is shown two-way and calorific,℃ of the 40~41 at the beginning of disease, 1~2d falls it is normal to come, after 3~4d answer elevatory, die very quickly next, 4~5d of course of diseases, the temperature when on one's deathbed drops more to normal temperature the following. Bottom of stomach of dog of die in one's bed of 2 analyse check has haemorrhage sex inflammation, show cardinal, small intestine mucous membrane falls off, alvine wall attenuates, there is gules mucus inside, mix inside large intestine have show wine blood excrement and urine, there are a lot of haemorrhage places on mucous membrane, haemorrhage of rectum mucous membrane is more, mesentery lymph node enlargement, sometimes afterwards sends intussusception, alvine tangent plane bleeds, cardiac muscle is loose, color becomes weak, cystic plentiful, liver is qualitative fragile and brittle. 3 diagnose 3.1 epidemiology to diagnose this ill much hair at young dog, rather dog of epidemic disease have an inoculation feels the most easily, be affected directly or affect secondhand, basically pass enteron infection, this disease all can happen all the year round, but with cold...

下面介绍中西医结合治疗藏獒细小病毒性肠炎的心得，以供参考。1发病情况和临床表现病犬多为2~4月龄幼犬，多数为忽然发病，食欲减退或废绝，精神沉郁，全身症状急剧恶化，发生剧烈性呕吐和腹泻，呕吐物先为食糜，继为黄色或黄绿色泡沫黏液和血样物，泻粪有灰黄色的黏稠物，后转为恶臭的内含黏膜状稀粪，继而呈血痢，由于病犬剧烈呕吐和腹泻迅速脱水，眼球下陷，体温呈双向发热，病初40~41℃，1~2d降至正常，3~4d后又复升高，然后很快死亡，病程4~5d，临死时体温多下降至常温以下。2剖检病死犬胃底部有出血性炎症，呈深红色，小肠黏膜脱落，肠壁变薄，内有红色黏液，大肠内混有呈暗红色血液粪便，黏膜上有许多出血点，直肠黏膜出血较多，肠系膜淋巴结肿大，有时继发肠套叠，肠切面出血，心肌松软，颜色变淡，胆囊充盈，肝质脆而易碎。3诊断3.1流行病学诊断本病多发于幼犬，未免疫接种犬最易感，直接感染或间接感染，主要通过消化道感染，该病一年四季均可发生，但以寒。。。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。