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The conditional symmetry instability is the intermediate process between the stable and instable states of the atmosphere. The evolution of the atmosphere from the stable to unstable state or from unstable to stable state comes through two stages. The convective-symmetric instability circulation is related with the state and type of the instability. When the conditional instability lies in the lower level and conditional symmetric instability in the upper level, the circulation will have vertical updrafts in the lower level and slantwise updrafts in the upper level. The release of conditional symmetric instability gives rise to a mesoscale rain belt.

结果表明：条件对称不稳定是大气稳定状态和条件不稳定状态之间的中间纽带，大气由稳定向不稳定或者由不稳定向稳定的演变均通过条件对称不稳定来实现；对流对称不稳定环流的形成与不稳定层的配置有关，当低层为条件不稳定而高层叠加深厚的条件对称不稳定时，对流对称不稳定环流低层出现垂直上升气流，高层出现范围较广的倾斜上升气流，对称不稳定能量释放产生中尺度云带。

The mechanism was similar to the equivalent barotropic warm core structure. The Conditional Instability of the Second Kind was the primary mechanism of development and maintenance for MCSs in case 2005. As the MCSs intensified and persisted, the latent heating was highly efficient in producing significant enhancement of Mei-Yu front systems. The LLJ intensified by Coriolis acceleration of ageostrophic wind was induced by the effect of latent heat release. The LLJ and the effect of latent heat released reinforce each other in convection system through a positive feedback process.

综合而言，2005年个案中梅雨锋面结构为垂直近乎不倾斜的浅系统，槽线系统不明显，锋面水平温度梯度微弱，低层具有强水平气旋式风切，较似正压系统，个案中MCS发展及维持机制，主要是透过CISK 过程来维持；其过程是由於低层锋面带上之辐合激发对流发展，对流潜热释放造成局部气压梯度增强，因而增强地转风；而潜热释放亦有利低层辐合之增强，产生非地转风，再透过科氏加速增强西南风，使LLJ增强，形成一正向的回馈作用。

The results show that the brush-plating coating is even and compact from section plane with good toughness and adhesion. The microhardness of the coating is 230.6HV0.5 which is 3 times of cast aluminium substrate. The wear resistance of the coating is 3 times of cast aluminium substrate. But the friction coefficient of the coating is 0.70 which is more high than that of the substrate, which is favorable for the fixed conjugate between the axis sheath and the axis seat of the gear-box.

结果表明，镀层厚度分布均匀、致密，镀层与基体界面清晰，未出现氧化物夹层，镀层的韧性和结合强度均较好；测得碱性铜及铸铝基体的显微硬度分别为230.6、74.2HV0.5；碱性铜的镀制使基体表面显微硬度及耐磨性均提高了2倍多，磨损状况明显改善。

This dissertation focuses on solving this convex optimization problem byanalytical approaches.

由于各层协议的设计都会影响整个网络能量的消耗，NLM问题需要综合考虑各层协议的约束，因此本文采用跨层优化的方法解决这类问题。

Convolvulus P. multiflorum P. cuspidatum have the exine stratification considered as typical of the dicots, endexine, foot layer, columellae and tectum.

结果表明：外壁结构分化成两个明显的层次，即外面的外壁外层以及内面的外壁内层，其外壁外层由覆盖层、柱状层和底层组成的。

D gas field is a structural-lithological reservoir. The main gas formation is marine shoreface sandstone dam and shoreface beach sand. The reservoir has serious anisotropy. This mainly shows the coombe on the surface and the thin interlayer in reservoir.

D气田为构造－岩性油气藏，主力气层为海相临滨砂坝和临滨滩砂，储集层非均质性严重，主要表现为平面上的冲沟和储层内部厚度较薄的隔夹层。

Canopy with brick tower Corbel Shi Sanceng out, bottom-up four-and eighth-out water chestnut son of teeth.

塔檐用砖砌叠涩挑出十三层，从下往上四层和第八层挑出菱角牙子。

Structure of maculae densa is observed around renal corpuscle, but no medullary loop is discovered.

肾小囊是肾小管的起始端，由内、外两层壁层构成，内层与肾小球的毛细血管紧贴，外层为单层扁平上皮细胞。

The results show that soil-root complex still comply with Coulomb's law; root-soil complex cohesion and the incremen in the unit soil content directly proportional relationship, and the root system anchoring role formula is established based on this; Different distribution methods in root has different impact on the shear strength of composite material.

最后，通过有限元分析表明，草根的作用，能够降低浅层土体中的应力水平，即草根能改变浅层土体的应力应变状态；草根增加了浅层土体的粘聚力，对边坡的稳定是有利的。

With the increase of SiO〓 layer uiickness, pseudocrystal SiO〓 initially grows into cristobalite and, then, into amorphous when its thickness beyond 3.4nm.

随着SiO〓层厚的增加，TiB〓／SiO〓多层膜中的SiO〓从赝晶结构长成方石英结构，并在SiO〓层厚超过3.4nm后转变为非晶。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐