热稳定的

It is proved that the two-dimensional non-hydrostatic Boussinesq equations on the x ? z plane with the kinetic viscous term and the thermal dissipative term are unstable equations in the C 2 function class.2. If we replace the influence of the kinetic viscous term by Rayleigh friction and the thermal dissipative term by Newton cooling, the new generalized equations are stable equations in the C 1 function class. The construction of the solution space and the discriminating method for well-posedness of the problem of determining solution are given.

本文的主要结果如下：1证明了在y方向上均匀的带有运动粘性项以及热耗散项的两维非静力、Boussinesq近似的x-z面上两维旋转流体的控制方程组在C 2函数类中是一个不稳定的方程组。2如果以瑞利摩擦来代替粘性的影响，以牛顿冷却来代替热量的耗散，则所获得的一个新的方程组在C 1函数类中是一个稳定的方程组，给出了其解空间的构造和各种定解问题的适定性的判别方法。

Weaknesses: Defensively Tucker could stand to improve on his intensity … Doesn't seem to possess great anticipation skills nor the awareness to play the passing lanes … Ball handling, while improved, still isn't great … Perimeter shooting remains prone to streakiness … Not a great shooter coming off screens … Solid three point shooter when his feet are set but struggles to hit with regularity due in part to his slow release … Despite being a great athlete, Tucker rarely explodes off the dribble due to his average first step … Doesn't always use the mid-range jumper to his advantage, often he'll slash to the basket or shoot the three … From a position standpoint there is concern about what position he will play in the NBA … While blessed with athleticism, he may struggle to shoot consistently enough to play shooting guard and his height might be a detriment at small forward … While his game has progressed considerably over the past 5 years, one has to wonder how much more he can improve … Below average free throw shooting limits his ability to take full advantage of the contact he creates … BY Matthew Maurer

弱点：Tucker应坚持提高他在防守中的紧张程度。没有让大家看到令人期待的技能。边缘的投射仍然有些忧虑，犹豫。持球能力在提高，但仍然不是很好。。。三秒区也没意识到传球。在脱离掩护后不是名很好的射手。定点时稳定的3分射手。但他仍尽力使自己的得分更加稳定，有规律。很大程度是因为他的慢热。而且作为优秀的运动员，Tucker很少突然运球加速，因为他启动速度不是很快。。。他不总用他中距离跳投的优势，他经常slash to the basket或投射3分。。。他现在很担心忧虑自己将会在NBA中担任什么位置。。。当他有幸得到良好的运动热情，他可能去担当得分后卫而且他的身高不利于打SF。当他过去5年已经有了相当大的进步，人们都对他还有多大的提高空间感到疑问。他低于平均水准的罚球能力限制了他利用身体优势造对手犯规然后得分这种战术的实施。

To obtain a complete picture about shock formation in non-viscous flow, in the succeeding chapter we investigate the isothermal shocks in adiabatic flows. We find that in this case the shock solution still exists, but the structure and the properties of the solution are greatly different from above even qualitatively. In some region of the parameter space there only exists unstable shock solution and in some region of the parameter space there may exist two stable shock solutions.

为得到完整的无粘流体中激波形成的图象，在接下来的第四章，我们研究绝热流体中等温作为激波条件时的情况，发现此时激波解仍存在，但解的结构和性质甚至在定性上都与前两章有了显著的不同：某些参数空间只存在非稳定的激波解，某些参数空间则会同时出现两个稳定的激波解。

The Earth possibly is one by occupies the major part material stably the counter-flow inner layer as well as occupies the few parts the counter-flow outer layer to be composed, the former is constitutes the Earth quite stable movement, the attraction, the magnetic field and so on the macroscopic phenomenon foundation; The latter constitutes the Earth most to be rich in the change the beautiful semblance, such as: Land, islands, volcano, earthquake, plate movement and so on nature environment with each kind of great phenomenon, eliminate this this also are decide the Earth for the perfectly round spheroid basic reason, because the internal heat circular reactions is from starts, the huge energy finally becomes the Earth good fortune a beautiful rich life the star.

地球可能是一个由较稳定占绝大部分物质的对流内层以及占较少部分的对流外层组成，前者是构成地球比较稳定的运动、引力、磁场等宏观现象的基础；后者则构成地球最富于变化的美丽外表，诸如：陆地、岛屿、火山、地震、板块运动等等自然界环境与各种伟大的现象，除此这也是决定地球为浑圆球体的根本原因，因为内热循环反应是从一点开始的，巨大的能量最终把地球造化成一颗美丽的富有生命的星球。

Because of the adulteration of rare earth ion and the lamellar structure of the calcium and titanium mine, the material has lower heat conductivity and higher coefficient of thermal expansion compared to the zirconium oxide which is stabilized by 7-8% yttrium oxide.

由于稀土离子的掺杂及其自身的层状钙钛矿结构，该材料与目前普遍使用的7～8％氧化钇稳定的氧化锆相比具有更低的热导率和更高的热膨胀系数。

At the present time, It is a major method of research on the thermostability of thermozymes to compare the homology of amino acid sequence between thermozymes and mesophilic enzymes.

螺旋的稳定性使嗜热酶在二级结构上更稳定。在高级结构中，&额外&的离子键、疏水作用、氢键、寡聚体的形成等对嗜热酶的耐热性起主要作用。

Polyimide films capped with nonreactive phthalimide end groups were synthesized with theoretical number average molecular mass of 10000 and 30000 calculated using the Carothers equation. The effect of end-capper on the thermal properties was studied by investigating the change of the glass transition temperature T(subscript g of films after cured at high temperature.

制备了经邻苯二甲酸酐封端的理论数均分子量为10000和30000的聚酰亚胺薄膜，通过差示扫描热分析测定薄膜高温热处理前后玻璃化温度的变化，研究了PA封端对ODPA/ODA聚酰亚胺薄膜热稳定性能的影响。

On other hand, specific fragments containing thermostable DNA polymerase gene were amplified from the genomic DNA of some strains of thermophilic bacteria isolated from Yunnan hot springs, and recombinant plasmids were constructed.

同时，我们还利用特异性的热稳定DNA聚合酶基因的扩增引物，从生长在云南温泉的嗜热菌总DNA中筛选出了能被此类引物扩增的特异性片段，并构建了相应的重组质粒。

The effects of various antioxidants on the discoloring behavior and the mechanical properties of the PA6 specimens during the course of thermal-oxidative aging were systematically studied.

研究结果表明：使用胺类抗氧剂能明显地改善PA6的抗热氧老化变色性能，还能使其保持较高的热稳定性能和力学性能，并大大延长PA6的静态使用寿命；用酚类抗氧剂/亚磷酸酯抗氧剂组成（1：1）的稳定体系能对改善PA6的耐热氧老化性能产生协同效应。

During the calculation of the early age temperature field, the early age physical and mechanical performance of concrete varies with its age, therefore in the second chapter we discuss the early age physical and mechanical performance of concrete and its development regulation with time, we emphasize elastic module and the development about the early age strength of concrete varying with time, at the same time consider the effect of shrink and creep upon the early age of concrete, in succession discuss how to confirm the physical parameter of thermodynamics of concrete.

之后讨论了混凝土的热物理参数的确定。为了能够正确合理的应用有限元方法求解早期混凝土温度场问题，第三章论述了求解温度场的有限元方法。第三章首先对热传导的微分方程作了阐述。之后确定温度场的边界条件。本章采用变分原理推导有限单元法计算温度场的公式。因此在第二小节叙述了变分原理，然后阐明了不稳定温度场的计算的三种方法，确定第四章分析中将采用向后差分法求解0#箱梁早期的温度场。

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。