非稳定的

Two stable dynamic mathematic models of extrusion have been created, which have some relation with times, by using the experiment data of extrusive processing of instability.

利用非稳定状态挤出过程的试验数据，建立了与时间关联的两个不同稳定状态之间产率变化的动态数学模型。

With the new model and the program, steady seepage field in work period, free surface position variable law with time at upper reaches in unsteady seepage period and seepage field variable law on the condition of different seepage coefficient and water decrease speed are stimulated.

利用建立的模型和编制的程序能模拟正常运行期的稳定渗流场、非稳定渗流期上游水位变化时自由面位置随时间的变化规律以及不同的水位下降速度时渗流场的变化规律。

According to the stress-strain complete process curve, the total volumetric strains and crack induced 1 volumetric strains is adopted as damage parameters for analyzing the five phases during the crack growth (crack closure , linear elastic, stable crack growth, unstable crack growth and post failure).

通过压缩试验获得的脆性岩石的全应力应变曲线，利用体积变量和裂纹体积变量等损伤变量分析得出裂纹发展的五个阶段即：压密、弹性、微裂纹稳定扩展、裂纹非稳定扩展和峰后失稳等。

This equation is changed into the standard form of the Mathieu equation by using Galerkin method.

应用Galerkin原理将该屈曲方程整理为Mathieu方程的标准形式，并利用Mathieu方程解的稳定区域与非稳定区域的分界，即方程系数的本征值关系，得出磁弹性问题屈曲临界状态的判别方程。

In this paper, the relations between the transparence of polymer film and polymer structure, phase, and movability of photon have been studied by using stable and unstable scattering rates under different boundary conditions.

利用在给定一系列边界条件下的稳定，非稳定散射研究聚合物薄膜透光性与物质的结构、相态、光子运动等物理性能的关系，为工农业和先进技术合理选用聚合物质薄膜，提供了重要的理论和应用价值。

Through the comparison of energy, the asymmetric solution is stable while the symmetric one is revealed unstable.

通过变形发生分岔前后的能量比较发现，分岔后的对称变形是不稳定的，而非对称变形是稳定的。

Alternating Direction Implicit-Finite Difference Time Domain is unconditionally stable and the maximum time step size is not limited by the Courant stability condition, but rather by numerical error.

摘要基于交替方向隐式技术的时域有限差分法是一种非条件稳定的计算方法，该方法的时间步长不受Courant稳定条件限制，而是由数值色散误差决定。

A non-uniformly windowed pyramidical architecture is proposed, the normalizations of the feature vectors of two extraction algorithms are investgated and the Polak-Ribiere learning algorithm is modified to guarantee the weight vector not to converge to non-stable local minima.

文中提出了一种带非均匀窗形式的金字塔状多层神经网络模型I研究了两种特征提取方法的向量规整问题，改进了Polak—Rjbiere学习算法并证明它能够保证连结权向量不收敛到非稳定局部极小点。

The two-dimensional CDRC-ADI-FDTD update equations for collision unmagnetized plasma are induced. The unconditional stability of the CDRC-ADI-FDTD formulation for collision unmagnetized plasma is obtained by the examples.

推导了碰撞非磁化等离子体中的二维CDRC-ADI-FDTD迭代公式，并用算例验证了碰撞非磁化等离子体CDRC-ADI-FDTD算法也是无条件稳定的。

The influence of thickness of acoustic absorbing material on propagation characteristics of unsteady gaseous detonation through the right-angle tee joint bend was analyzed.

在上述的直角三通弯管中安装声学吸收材料，研究气体非稳定爆轰波的传播特性。结果表明：声学吸收材料对弯管中非稳定爆轰波传播有很大的影响。

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。