变变

Birds and insects, even the gayest and most lawless, were concealed, abated, voiceless, folded in on themselves, up to absolutely nothing at all in the transfixed light and warmth but, the senses warned one, at any moment all would be on the turn to something else ---a runt of a leaf would suicidally loosen it grip, and fall; a bird would speak with tiny, sweet inanity; a less restful fish would nudge its mouth above the glass surface between the lily-pads, and prove it liquid and illusion; a shadow would hint its ultimate allegiance with midnight, owls, blackness, sleep, and its need immediately to lengthen a hair's-breadth, and become an infinitesimal degree cooler.

即使是最活泼淘气的虫鸟也悄悄地把身体蜷缩起来，不知躲到哪里去了。炙热的光线里好象一无所有，感觉却告诉你一定有些什么。所有的东西都随时会变一个样子：一片叶子可以自动脱落；一只鸟可以细声细气地说起话来；一尾不安静的鱼在百合花叶间轻啄，证明它们是只水中的幻象；一片阴影暗示着午夜，猫头鹰，黑暗，以及睡眠，它多么希望自己变大一点点使周围变得凉爽。

A new universal hybrid topology is brought forward. Two types multilevel inverter: equal DC voltage and DC voltage in geometric proportion is studied, besides this, simulation and experiments on SVPWM applied on cascaded H-bridge inverter is also studied.

提出了多电平逆变器的一种通用组合拓扑结构，针对这种拓扑结构重点，研究了直流侧电压相同及等比变化的两类级联拓扑以及级联H桥逆变器的矢量控制方法；并对级联H桥逆变器的矢量控制方法做了实验研究。

Part Ⅰ deals with the foundmental theory of variational technique in the lossy electromagnetic fields. In chapter two and three the Green theorem is introduced so the unified method to derive functional is given. Chapter four is devoted to discuss two type of inner product. In chapter five the generialized least function theorem is given and applied in the derivation of variational expressions.

第一篇主要是关于有耗电磁变分的基础理论，由四章组成，前二章引入了以Green定理为核心的边值问题理论，建立了电磁变分的普遍理论，第四章从对称的观点出发讨论了建立泛函的两种内积形式，第五章给出了一般电磁场的广义最小作用量原理，并用之解决变分问题。

Mass fraction) sodium erythorbate ;nonenzymatic browning of greengage juice was restrained more remarkably by vacuum concentration than by normal pressure concentration;the non-enzymatic browning of greengage juice increased and the color darkened with the increase of concentration and processing temperature;non-enzymatic browning of greenga.

结果表明：在青梅果打浆时加入质量分数为0.2%的异抗坏血酸钠，可防止果汁氧化褐变而保持天然淡黄色泽；减压浓缩较常压浓缩明显抑制了非酶褐变的发生；随着果汁含量和加工温度的提高，非酶褐变加快，色泽加深；低温有利于青梅浓缩汁的贮藏，冷冻贮藏是最佳的贮藏条件

In the present paper, we determined the mitochondrial DNA sequence 539bp of the high variable I D-loop regions(mtDNA HVS-I) for 243 domestic fowls 19 were Wugu (or black-bone chicken and 8 non-wugu breeds/races and 38 red jungle fowls (Gallus. Gallus. spadiceus and Gallus. Gallus. jabouillei). We also sequenced 289bp mitochondrial DNA of Cyt-b for 5 red jungle fowls; D-loop region (mtDNA HVS-I)for 19 individuals Guinea fowl and 18 individuals mule chickens (Guinea fowl $ x Wugu chickens^ ) respectively; mtDNA HVS- II of D-loop region for 34 individuals of domestic fowls and red jungle fowls in 690bp and the MC1R code gene in 945 bp.

本文共测定了19个乌骨鸡品种及8个非乌骨鸡品种的243个家鸡和38个原鸡个体(属于Gallus.gallus.spadiceus和Gallus.gallus.jabouillee亚种)的线粒体D-环高变区(mtDNA HVS-Ⅰ)539bp的部分序列，另外还测定了5个红原鸡个体线粒体细胞色素b的289 bp序列、19个珍珠鸡个体、18个骡鸡个体的线粒体D环高变区序列、30个家鸡个体线粒体D环非高变区的690bp序列以及34个家鸡及原鸡个体的MC1R基因编码区的945bp。

The DFP method is proved a officient one in processing unconstrainted optimization problem, so in this thesis, used the idea of mechanical structural optimization for reference analytically and extended modified formula of DFP—matrix to shape optimiation the DFP—Hamilton function method is put forward.

由于变尺度方法是有效的无约束优化方法，本文在分析的基础上借鉴了机械结构参数优化的思想，并将变尺度矩阵的修正公式扩展至形状优化中去，进而提出了变尺度—H函数极值法，并用其解决了梁、柱和复杂曲面的形状优化设计问题，取得了较好的效果。

By Llibre's algebraic invariant theory, at first on the basis of classification for quadric and quadric homogeneous binary polynomial, the plane linear and cubic homogeneous polynomial differential systems are classified.

利用Llibre的代数不变式理论，首先由二元二次和二元四次多项式的分类结果，对一次和三次齐次多项式微分系统进行代数分类，同时补充了已有结果中出现的漏洞；其次，由称共变张量空间的性质，对缺二次项的三次微分系统在保证轨线走向不变的前提下进行代数分类，使分类后同类系统的示性多项式有相同零点；最后通过讨论一类简单系统的有界性说明了分类的方便方处。

A hyperbolic sine relationship is found to correlate well the flow stress with the strain rate, and an Arrhenius relationship with the temperature. The strain hardening coefficient n and deformation activation energy Q are evaluated by linear regression analysis. And the flow stress constitutive equation of the alloy during hot compression is obtained.

应变速率和流变应力之间满足指数关系，温度和流变应力之间满足Arrhenius关系，通过线性回归分析计算出该材料的应变硬化指数n以及变形激活能Q，获得该铝合金高温条件下的流变应力本构方程。

Under the hypothetic climate change scenarios of 20% change in precipitation and –2℃ change in temperature, annual runoff in the four regions will increase 37.8%, 62.3%, 73.2% and 48.2% respectively in order.

根据黄河上中游未来气候的可能变化，假定的气候变化方案为：降水变化为±20%、±10%和不变，同时气温保持不变及变化±1℃、±2℃共25种组合。

If he is you grow worse, he become for you lovely, he changed for you heart ……you how, if she is your clipping long hair, she start to keep for you immortalization of firework, you would be sad still will they tightly pack go into bosom medium.

如果他为你变坏，他为你变乖，他为你变了心……你要怎样，如果她为你剪断长发，她为你执起不灭的烟火，你会伤心还是将他们紧紧的包入怀中。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。