查询词典 permanence

Experiments done by Bower suggest that babies develop a sense of object permanence when they are about 18 weeks old.

鲍尔的实验证明婴儿在出生大约18周的时候就培养了物体恒存性的感觉。

This dissertation holds that the Communist Party has the internal demand of permanence maintaining its class benefit and realizing its ideal, because of its class characteristic and the pursuit of communism ideal.

本论文认为共产党的阶级特性和共产主义的理想追求，决定了其对所代表的阶级利益的持久维护以及理想的最终实现有着内在的诉求，这就要求有着共同理想和利益的人能够长期掌握政党的领导权以及国家的政权。

Paradoxically, Zeami finds a metaphor of the permanence of art in the ever-going cycle of Change as flowers come into blossom and fade, begin to bud forth and bloom again.

吊诡地，世阿弥在一个不断前进的循环，变，如同花绽放与凋零，又开始冒芽及再开花的过程中，找到一个可代表艺术永恒性的譬喻。

In the forth chapter, by employing the comparison theorem in theory of difference equations together with pure analysis, we get sufficient conditions for permanence of a class of ratio-dependent discrete system.

第四章运用差分方程理论中的比较定理和纯分析的方法得到离散系统持久性的充分条件。

By applying the comparison theorem and some new analysis technique, some sufficient conditions which guarantee the permanence of the system are obtained. After that, by constructing a suitable Lyapunov function, sufficient conditions which ensure the global attractivity of the system are obtained.

利用差分方程的有关理论，使用与前面不同的分析方法，获得保证该系统永久持续生存的充分性条件；其后通过构造适当的差分Lyapunov函数，得到保证该系统全局吸引的充分性条件。

Here reigned a species of things that was, no matter how compliantly it bowed to the minor whims of fashion, in the main so wholly convinced of itself and its permanence that it took no account of wear, inheritance, or moves, remaining forever equally near to and far from its ending, which seemed the ending of all things.

统治这里的是这样一类事物，不管它如何顺从于潮流的变幻无常，大体上它仍坚信自己，坚信自己的永恒性。因此它不考虑磨损、继承或变化，永远与它的末日保持相同地远又相同地近，仿佛它的末日，就是万物的末日一般。

By using the theories and methods of impulsive,discrete and continuous dynamical system,arithmetic operators,optimiza-tion and numerical simulation,we study locally and globally asymptotieal stability of the boundary periodic solutions,and the permanence of the these systems.

以脉冲动力系统理论为基础，同时结合离散动力系统、连续动力系统、算子理论、优化理论等相关的理论和方法，在已有的研究成果的基础上，研究这些模型的边界周期解的局部和全局渐进稳定性、系统的持续生存、周期解的存在性与唯一性以及周期解的轨道稳定性等等。

Specially made ceramics electrode daylight lamp of nanometer ,It is the electric light source patent technique produce that one kind of electrode launch electromagnetic wave that the ceramics stuff by means of the permanence was make was kindled phosphor powder .

纳米特制陶瓷电极荧光灯，是一种通过永久性的陶瓷材料制成的电极发射电磁波点燃荧光灯的电光源专利技术产品。纳米特制陶瓷电极荧光灯技术，改变了传统荧光灯的技术原理，材质和构造，纳米陶瓷电极荧光灯的使用寿命是白炽灯的30倍。

The principle of permanence of form, an arbitrary dictum, could not serve as a solid foundation for algebra

型的永恒性原理是一种任意的理论，不能作为代数的牢固基础。

The first part presents develops of predator-prey systems and gives the model that is investigated in our paper; Chapter 2 presents the results on boundedness of solutions and permanence of system; In chapter 3, we explicitly derive a domain of attraction for the positive equilibrium of system by using Liapunov method; The local stability and the conditions that Hopf bifurcation occurs are obtained in chapter 4; In chapter 5, some explicit fomulae of the direction of Hopf bifurcation and the stability of bifurcating periodic solutions on the center manifold are determined,using normal form and center manifold introduced by Hassard et al; In chapter 6, some numerical simulations are performed to illustrate the analytical results found; Our paper ends with a brief conclusion.

全文共分七章，第1章对捕食-食饵系统的发展背景做了介绍并给出了本文研究的模型；第2章讨论了系统的保持性和解的有界性；第3章研究正平衡点的全局性质，对正平衡点的吸引域进行了精确估计；第4章研究了系统的正平衡点的局部稳定性和Hopf分支存在的条件；第5章利用规范型和中心流形定理得到了一个决定Hopf分支方向、分支周期解的稳定性及其他性质的精确公式；第6章对一个具体模型进行了数值模拟；第7章对全文进行了总结。

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