变度

By the field survey which lasting a period of 3 grown seasons and by the means of remote sense and geographic information system, we ascertain the present vegetation pattern of Hunshan-Dake sand land, find out vegetation distribution principles on the different scales in the same time . From west to east, with the increasing of dry degree, the type of plant community changed form the xeric to the mesic. The vegetation of Sand land shows the characteristic of the zonal vegetation, but dont consistent with the traditional diversification principle. The vegetation of the middle part displays a high differential characteristic, which compresses the longitudinal zonation at a certain extent. So we can say that sand land vegetation is semi-zonal.

通过对浑善达克沙地历时三个生长季的地面考察并应用遥感及地理信息系统等手段，确定了浑善达克沙地植被分布现状及浑善达克沙地植被在不同尺度下的分异规律：由西向东，沙地植被随着干燥度的降低，由旱生群落为主的区段递变为以中生群落为主的区段，表现出具有一定的地带性植被特征，但与传统的地带性植被的递变规律不相一致，沙地中段的植被表现出了高度的特异性，在一定程度上压缩了植被的经向地带性，表现出沙地特有的地带性分布规律，所以认为沙地植被是一种半地带性植被。

The abundances of the five elements of both categories increase with increasing metallicity.

这两类红团簇巨星中的5种元素均具有随金属丰度变大而增丰的趋势。

The theoretical analysis shows that the wave-activity relation presented a nonconservative form in which the pseudoenergy wave-activity density is composed of disturbance kinetic energy, available potential energy and buoyant energy. The local change of pseudoenergy wave-activity density depends on the combination of shear of zonal basic flow, Coriolis force work and wave-activity source or sink as well as wave-activity flux divergence.

理论分析表明，拟能量波作用方程具有非守恒形式，其中的拟能量波作用密度主要由扰动动能、有效位能和浮力能三部分组成；拟能量波作用密度局地变化除了受拟能量波作用通量散度影响之外，纬向基本气流切变、科氏力作功以及由非绝热加热和水汽相变所构成的波作用源汇项对其也都有贡献。

The proportion of reserves of low permeability gas reservoirs to nonproducing reserves is larger and larger in China at present. And the depletion way of production is used in low permeability gas reservoir currently, so the gradual drop of formation pressure during the exploitation will result in the deformation of rocks, which makes the reservoir porosity and permeability decline.

目前中国低渗透气藏的储量占未动用气藏储量的比重越来越大，而低渗透气藏一般都采用衰竭式开采，在生产过程中地层压力逐渐下降，导致储层岩石变形，使得孔隙度和渗透率降低，从而导致低渗透气藏开发效果变差。

The results show that the heterostructure photonic crystal can extend remarkably the photonic bandgap compared with the periodic structure;a defect is inserted into the heterostructure photonic crystal,the nontransmission band is wider than that of the symmetric structure without heterostructures,(1H1L)_m(1H)_n(1L1H)_m.

结果表明，与周期结构相比异质结构光子晶体可以显著地拓宽光子晶体的光子带隙；在该文提出的结构中引入缺陷，与(1H1L)m(1H)n(1L1H)m光子晶体相比，产生缺陷模式光子带隙范围明显拓宽，适当调整缺陷层的数目、位置和厚度可得到多通道滤波；并研究了实际操作中随机误差带来的影响，随无序度的增大，其带宽基本不变。

Even in an oven set as low as 225 or 250 degrees, if the pot is covered, the contents will reach the boil, and the meat will overcook and dry out.

即使烤箱温度设置到225或250度这样的低温，如果锅盖盖上的话，煮的东西也会达到沸点，肉类也会烹制过火并且变干。

When the voltage space vector is located within overmodulation mode I, the locus in the hexagon remain the circular, but the amplitude is larger than the modulus of voltage space vector to compensate the voltage distortion on the edge of hexagon; the reference voltage vector tracks the hexagon sides in the remaining.

实验结果表明，该算法简单易实现，能够有效的提高直流母线的电压利用率，具有在低频运行稳定，逆变器输出电流正弦度好等优点。

The adsorption of polyoxyethylene alkyl ether surfactants (Brij 30 and Brij 35) on synthetic smectite clay nanoparticles and the interactions between them have been investigated through surface tension, zeta potential and rheology properties measurements, showing that Brij 30 and Brij 35 are adsorbed onto Laponite surface, and the adsorption is increased with decreasing oxyethyl groups.

通过表面张力、Zeta电位和流变学参数的测定，研究了聚氧乙烯烷基醚类非离子型表面活性剂(Brij 30和Brij 35)在合成锂皂石纳米颗粒表面的吸附及对Laponite水分散体系中颗粒间相互作用和体系粘度的影响。结果表明，这类表面活性剂能显著地吸附在Laponite颗粒表面上，且吸附量随其分子中POE链长短而不同。

Results In 22 patients after injected PAHG, 3 cases (6 breasts) were normal, 7 cases (10 breasts) were stiffened, 8 cases (12 breasts) found callocity. MRI also showed 2 cases (2 breasts) of pectoralis major myositis and 2 cases (2 breasts) of concomitant mammary fibroadenoma.

结果：22例病例中，3例（6只）注入物所形成的乳房形态、柔软度正常，7例（10只）变硬，8例（12只）硬结，2例（2只）胸大肌炎，2例（2只）伴发乳房纤维瘤。

We present a new method of perturbative expansion in quantum chromodynamics with gluon background fields,which can be used at high,intermediate and low energy scales,and the corresponding Feynman rules are given.

对于具有胶子背景场的量子色动力学，从变分微扰论出发，通过对场作标度变换，把格林函数按一个合适的参数展开，提出了一种既适合于高能区也适合于中低能区的新的微扰展开方法，并给出了相应的费曼规则。

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