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The joint effect of active and reactive power on the voltage stability of a typical power system was considered by analysing the two parameter bifurcation problem related to nonlinear oscillation phenomena. Numerically, as the active power P1 increases, the Hopf points get closer and eventually coincide at P1=1.455 43 the cyclic fold curve gets closer and closer to the Hopf curve and finally intersects the Hopf curve at a singular point the period-doubling points also get closer and finally coincide at P1≈0.65. The stability behaviour is pre-determined using the normal form approach near the limit point of the Hopf curve. Hence, in the power system attention should be paid to both the consumption of active power and the decrease in the reactive power to prevent nonlinear oscillations. A controller can be designed to absorb some active power and to avoid the nonlinear oscillations that damage the system components.

针对一个典型的单机无穷大电力系统，通过分析系统的双参数分岔的非线性振荡现象，综合考虑有功和无功功率对电压稳定性的影响数值分析表明，随着有功功率的增加，电力系统的Hopf点越来越靠近，最终合为一点在P1=1.455 43处同时圈折cyclic fold 曲线也越来越靠近Hopf曲线，并在Hopf曲线的稳定与不稳定临界点处与Hopf曲线相交倍周期分岔点也随着越来越靠近，最终在P1≈0.65 合为一点应用正规形理论方法，初步确定了Hopf曲线极限点附近的稳定性态因而，电力系统应注意让负荷利用有功功率，减少无功功率的产生以防止非线性振荡另外，可以设计一个稍微吸收网络的有功功率的控制器，以避免因周期振荡而造成电力系统仪器的损坏或电压崩溃

The Failure model of slopes can be classified into 2 kinds, toppling model and sliding model. The force distribution of each model is analyzed in oblique coordinate system, and the equation to calculate the forces are derived. Many external forces, such as earthquake force, water pressure, bursting force, bolting force and etc., can be easily considered in these equations.

分析了倾倒模式和滑动模式两种岩质边坡的破坏型式，对其受力情况进行了分析，并利用刚体平衡理论，给出了在斜角坐标系下推力计算方程，该方程可以方便地考虑任意方向的地震力作用，还可以考虑水压力、锚固力、建筑物外荷载和其它人工作用力。

Yang will be looking to make up for that failure and is considered a strong contender for a gold both in the team and all-around individual competitions as well as possibly on the parallel bars and the rings.

杨威将会期待弥补那次的失败。不论在团体比赛、还是全能个人的比赛中、还是可能在双杠或吊环上他都被视为是一位强有力的竞争对手。

The first method is not related to petrogenesis, but welcomed by its benefit in field work and basic petrology research; the second method reflects magma sources and tectonic environment, which has always been considered to be very important since proposed, especially a steady flow of A-type granite result in recent years; the third method, often used by researchers, consists of information about mineralogy, petology and magma source; the last method is characterized for its simple and uniform classification criterion, as well as strong operability.

矿物学－岩石学分类不涉及成因信息，比较适用于野外工作以及最基本的岩石学研究；ISMA分类的标准反映的是岩浆源区和构造环境，自提出后备受重视，尤其是A型花岗岩的研究成果近来大量涌现；Barbarin的综合性分类包含了矿物学、岩石学和岩浆源区的信息，也受到一定的推崇；Frost的地球化学分类标准统一，具有很强的操作性。

As for parasites, is currently not considered to be caused by pica a major factor, but the child still repellent is a must, anthelminthic work twice a year must be upheld.

至于寄生虫，目前虽不认为是致异食癖的主要因素，但对孩子的驱虫仍不可少，每年两次的驱虫工作必须坚持。

In this paper, the characteristics and safety of bar gene, PAT proteins and glufosinate were expatiated. The bar gene and glufosinate play important roles in plant engineering, and bar sequences are considered to be as safe as any other DNA in food and have no pleiotropism.

本文对除草剂草丁膦及其抗性基因之一－bar基因及其产物PAT蛋白的一些特性和安全性作了阐述。bar基因及筛选剂草丁膦在植物基因工程中发挥着重要作用。bar基因无多效性，与食物中的DNA一样安全。

Kinematics model of the suspension be reduced to truss structure, but as each bar is absolutely rigid, hinge point is also considered to be only a pure rotation without any deformation of rubber parts, such results have a certain margin of error.

运动学模型中把悬架简化成杆系结构，而各个杆件看成是绝对刚性的，铰点处也认为是只有纯转动而无任何橡胶件的变形，这样所得的结果就有一定的误差。

Heterosmilax is considered to be derived from ancestral Smilax and occurs as the most derived clade of the Smilacaceae,and thus it is reasonable to retain it as a section in Smilax s.1. Within Smilax most currently recognized sections are polyphyletic, but some major lineages are distinct.

Coilanthus的部分种组成一个具较高支持率(88％)的单系分支，分析表明肖菝葜属并非是一个好属，应归入菝葜属；(3)菝葜属6个组的划分大都没有得到支持，只有东亚北美间断分布的草本菝葜组sect。

The sport of dog fighting in Japan has precise rules and it is stylized almost as much as the Sumo wrestling events. The Tosa Inu is considered to be the Sumo fighting dog of Japan being large powerfull and persistent.

另外你的亲戚朋友来你家玩的时候他也会表现的非常友好就和普通宠物一样，但是要注意的是他会和他们保持一定的距离，它不会将他们当朋友的哦，而是会保持一定的警戒状态。

As an example, the time series of China composite stock index is considered Firstly, the distribution of five days return on China composite stock index is studied. Secondly, based on the R/S analysis Hurst exponent is worked out and determination detecting can be done . Lastly, the topological characteristics such as correlation dimension and maximum Lyapunov exponent are extracted from time series.

作为例子，本文对中国股票指数时间序列做了实证分析，首先研究了中国股票指数的五天收益率的分布规律，然后运用重标极差分析方法计算出赫斯特指数，并以此为基础进行确定性检验，最后在相空间重构的基础上提取吸引子的拓扑特征指数。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。