变度

According to the principle of mutual transformation between potential energy and kinetic energy,the vertically falling law of power law fluid by the action of unconstant static pressure and the relation between rheological parameter and time were studied,thus providing a theoretical basis for calculating the rheological parameters of fluid in funnel viscomete...

根据位能与动能的变化关系，作者研究了在非恒定静压作用下幂律流体垂直下落的规律及流变参数与时间的关系，从而为计算漏斗粘度计中流体的流变参数提供了理论依据。

As compared with the traditional irrigation-traditional fertilization, the following results of the improved optimized irrigation-optimized fertilization were obtained: significantly higher nitrogen use efficiency; the like tiller number per unit area, percentage of the tiller ear number/the tiller number, the ear number per unit area, the greatly reduced grain number per ear, and significantly heavier weight of 1, 000 grains; a trifle taller plants; shorter base internode length, a bit more weight per unit internode length, longer internode length under ear; almost the same LAI values in middle and later stages; coincident process of dry matter accumulation from straight growth onwards, a little more dry matter accumulation amount from earing to maturity; a little longer flag leaf, 2〓 leaf, 3〓 leaf (but the three leaves were shorter than those of the optimized irrigation-traditional fertilization) and shorter 4〓 leaf from top, a bit reduced total area of these leaves; almost the same leaf thickness, mean canopy leaf tilt angle, light extinction coefficient , ratio of light penetration in the upper, middle and lower parts of the wheat canopy, and fair plant type; almost the same senescence process of flag leaf; and increased root amount in 0-120cm soil layer and smaller rate of progressive decrease of the root length density and root weight density with soil getting deep, which can strengthen the resistance to adverse conditions such as water stress in the later stage.

在优化水肥条件下，冬小麦总分蘖数、成穗率及单位面积穗数与传统水肥比较接近，但穗粒数显著减少，千粒重显著提高；株高稍有增加；基部节间长度缩短，充实度略微增高，穗下节间增长；中后期LAI与传统水肥的LAI值基本吻合；起身至成熟干物质积累量动态变化过程与传统水肥十分接近，但抽穗至成熟所形成的干物质量增加；上三叶变长（但上三叶长度增加幅度小于优化灌溉-传统施肥处理），倒4叶变短，总叶面积略有减少；叶片厚度、冠层平均叶倾角、消光系数、冠层各层的透光率与传统水肥差异很小，株型较好；旗叶叶绿素含量动态变化与传统水肥十分接近；0-120cm土层的总根量明显增加，上层根群和深层根群的差异最小，有利于提高小麦后期的抗逆力。

Myocardialβ3-AR density up-regulation obviously(-5.16±0.004 vs -5.13±0.011, P.05)in rats treated with dexamethasone compared with rats treated with saline. 6. Myocardialα1-AR density up-regulation obviously(-5.16±0.017 vs -5.14±0.003, P.01)in rats with CHF compared with normal rats, buffy particle increased in myocardium slice. Gray scale value grew down, and i.e.α1-AR density greatened.

地塞米松治疗的心衰大鼠与注射生理盐水的心衰大鼠相比，心肌的β3-AR明显上调(-5.16±0.004 vs -5.13±0.011， P.05)。6大鼠心衰时，心肌的α1-AR密度明显上调(-5.16±0.017 vs -5.14±0.003， P.01)，免疫组化采集的图像显示，心衰大鼠的心肌切片棕黄色颗粒明显增多，灰度值变小，密度变大。

When selecting well location and optimizing design plan, the authors advocate sticking to the following principles including restricting hole deviation, barefoot interval and horizontal displacement in the scope of 35 degrees, 400 meters and 200 meters respectively, trying to decrease the work of changing direction and hole deviation to ensure smooth borehole and increasing the quality of sidetracking and cementing wells and the results of oil increase.

在进行井位筛选和优化设计方案时应遵循的原则是：将井斜、裸眼段长、水平位移分别控制在35度、400米、200米之内，尽量减少变方位变井斜的工作量保证井眼平滑，提高侧钻井固井质量和增油效果。

Finally, the experimental setup of MR intelligent boring bar was built on the CA6140 type lathe. The experimental results show that the method can suppress the chatter efficiently and can improve the surface quality of workpieces significantly, whose roughness has decreased from 10 μm to 1.5 μm.

最后，在车床CA6140上搭建了磁流变智能镗杆的颤振抑制实验系统，实验结果表明，变结构刚度方法能够快速高效地抑制镗削过程中产生的颤振，并且使加工表面的粗糙度Ra从10μm降至1.5μm，大幅度提高了加工表面质量。

heological properties at a low shear rate range(10-2-10s-1) and the glass transition temperatures for PEK-C with different moleCular weithts have been studied by using a cone/plate rheometer and DSC' The activation energy for melt flow increases with Mw The dependence of Tg on molecular weight exhibits two linear range and the value of nitersect agrees with the critical molecular weight , Mc' which is first reported for PEK-C' Mc value obtained according to η0 is about 8× 104 g/mol and the relation between Mc and temperature was dis-cussed.

用锥权流变仪及DSC的方法研究了5种不同分子量的酞侧基聚芳醚酮在低剪切速率区（10－2－10s－1）的流变行为及其分子量与玻璃化转变温度的关系。结果表明，样品的粘流活化能随分子量的增加而增大，Tg随分子量的变化是二个线性区，其交点值与所求的样品的临界分子量值相对应。利用测得的零剪切粘度值（η0）首次求得了PEK—C的临界分子量值。同时也讨论了Mc与温度及η0和Tg与分子量的关系。

In this paper, the vehicle model on a scale of 1/4 and the half-sine curve are used to simulate the longitudinal curve of the plate girder bridge deck with creeping camber and the mathematical relations between the vehicle vertical vibration response and creeping camber, span length and vehicle traveling speed of the bridge are derived.

采用1/4汽车模型和半正弦曲线模拟板梁徐变上拱桥面线形，推导车辆竖向振动响应与板梁徐变上拱度、桥梁跨径、行车速度之间的数学关系。

The fermion environment is considered from zero temperature to the critical temperature. It is show that the decoherence of the two-level system may also act as the witness of the environments phase transitions, which is similar to the relation between quantum phase transitions and decoherence in the former study.

对于一维XY自旋链系统，二粒子系统的纠缠度会在自旋链的量子相变临界点附近发生剧烈的变化，这种剧烈的变化正是量子相变的一种外在体现。

Since the input and output current of the coupling transformer are in phase, the tank's current is lagging the inverter driving voltage.

下图，感抗高的结果是逆变器电流差不多滞后逆变器电压90度角。

The chroma (C3 ) of both perianths decreased, while the hue angle of the yellow outer peri2anths increased from yellow to pale yellow, and the red inner perianths decreased from red to dark red.

黄色外瓣和红色内瓣彩度C3值均变小，黄色外瓣色相角h增大，由黄色向浅黄方向变化，而红色内瓣色相角h变小，由红色向深红方向变化。

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