查询词典 cycles

In this thesis, the limit cycles bifurcated from some kinds of polynomial systems are investigated using the methods of bifurcation theory and qualitative analysis.

本文利用分支理论和定性分析的方法，借助于计算机等辅助工具对几类多项式系统的极限环分支问题进行了研究。

This number is closely related to the number of limit cycles which are bifurcated from the generic perturbed Hamiltonian systems 〓.

这个数目与n次通有的Hamilton扰动系统〓分岔出的极限环数目密切相关，其中〓。

It plays an important role in the process of energy exchange, biogeochemical cycles and hydrological cycle in land surface.

它在陆地表面的能量交换过程、生物地球化学循环过程和水文循环过程中扮演着重要的角色。

It will provide scientific basis for applying fertilizer rationly during biogeochemistry cycles of C, N and global climatic change.

为农田生态系统碳、氮的生物地球化学循环及全球变化下农业生产中肥料的合理施用提供科学依据。

Soil, as reserve depot of carbon and nitrogen, take extremely important effect during biogeochemistry cycles of C, N and global climatic change.

全球变化是近年来人们关心的热点问题，土壤作为碳、氮的储库，在碳、氮元素生物地球化学循环及全球气候变化中起着非常重要的作用。

More oocytes from natural ovulation cycles (28%) developed into blastocyst than that from superovulation (16%).

与超排相比较更多的在自然周期的体内成熟卵母细胞(16%，28%)发育到了囊胚。

Using qualitative analysis methods, the paper studies the boundedness of solutions and the existence of limit cycles.

利用定性分析的方法，讨论了模型在收获率条件下平衡点的稳定性，解的有界性，极限环的存在性问题。

Using general qualitative analysis methods, we study the boundedness of solutions, the properties of equilibrium and the existence of limit cycles.

利用常用的定性分析方法，讨论了模型在收获率条件下的解的有界性、平衡点的性态及极限环的存在性问题。

In the light of the paleoenvironmental significance reflected by the radiolaria, graptolite, brachiopod,sponge spicule and the rock character, its suggested that the greyish green mudstone at the basal WufengFormation of the Goujiaya section would be probably deposited in 60 to 100 meters deep water, theGuanyinqiao bed in 50 to 80 meters deep, and the radiolaria-bearing silicalite from Wufeng Formation inwater with 200 to 400 meters deep. Combining the above-mentioned water depth with the sea-level changecycles, the change range of every one of the 5 cycles could be further conjectured. They were in ascendingorder: 20～120 m, 80～130 m, about 150 m, 50～250 m, and in excess of 200 m.

根据放射虫、笔石、腕足类、海绵骨针以及岩性等对古环境的指示意义，认为五峰组底部灰绿色泥岩段产出时水深约60-100m，观音桥层水深约50-80m，在晚奥陶世最大海侵期(对应于T.typicus亚带下部)，水深约400m，五峰组含放射虫硅质岩沉积时最小水深约200m，结合以上海平面变化的5次旋回，从而推算出各旋回海平面的变化幅度：在第①旋回，海平面变化范围大致为20～120m；在第②、第③和第④旋回中，海平面变化分别为80～130 m、大约150 m和50～250m；第⑤旋回的海平面升降幅度大于200 m。

On the other hand, the world has gone into an era of knowledge economy, the manufacture technology of the automobile industry in the world is much more than design and production and should include its whole life period or periods from market investigation, development and amelioration, manufacturing, distribution, after-sales service, breaking-down and reclamation to new cycles.

一是我国加入WTO后，国产汽车要应对全球化的挑战；二是进入知识经济时代，世界汽车工业的制造技术应考虑和操作的不再止于产品的设计与生产，而应包括从市场调查、产品开发和改进、制造加工、销售、售后服务，到产品报废、解体、回收，再到循环使用、循环利用的产品整个生命周期和多个生命周期。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷