In this paper, ackerman steering linkage of double - wishbone suspension is taken as the study object, choosing the splitting joint and steering lever joint to carry out the design of optimization the mathematics models are established based on the multi - body system dynamics, applying its analysis method of kinematics to study the mechanism kinetic principles owing to more spatial factors considered, and calling off many hypotheses affecting the accuracy, compared with the traditional methods, the models are better to reflect the realistic motion principles, the results are more exact and applicable moreover, the force analysis is applied to the conduct mechanism the analysis method of dynamics in the multi - body dynamics is applied to study the forces applied on every component, working out the constraint reaction force of up and down ball joints, and developing the current computation program in the end, produce the upper wishbone geometry model in the ansys software package, meshing and carrying out the fea, testifying if the intensity of the wishbone meet with the requirements
本文以雙橫臂獨立懸架的轉向傳動機構
作為研究對象,選擇對斷開點和節臂球銷的位置進行優化設計,在此基礎上建立了基於多體系統動力學的導向機構和轉向傳動機構的數學模型,運用該學科的運動學分析方法研究機構的運動規律,編制了通用優化設計軟體。由於考慮了更多的空間因素,取消許多影響準確性的假設,因此建立的數學模型與傳統的方法相比更能反映實際運動規律,得到的優化結果也更加
精確實用。此外,本文還針對導向機構進行受力分析,在建立該機構的空間動力學模型后,運用多體動力學中的動力學分析方法研究各個桿件的受力,計算出上下球鉸的約束反力,並開發出了相應的通用計算程序。
Thing - thing 3, exciting action shooting games waiting for you to challenge oh operations guide :
Thing - thing 3 ,
精彩動
作射擊游戲等著你來挑戰哦
During the process of fertilization a zygote with the diploid set is produced
通過受
精作用使受
精卵形成一個二倍體。
The development of gynoecium after anthe - sis and fertilization in eleutherococcus senticosus araliaceae
刺五加開花后雌蕊的發育狀態與受
精作用
Testa the hard dry protective covering of a seed, formed from the integuments of the ovule. after fertilization the layers of the integuments fuse and become thickened and pigmented
外種皮:覆蓋在種子外部的堅硬幹燥的保護層,由胚珠的珠被發育形成。受
精作用后珠被各層發生融合併加厚著色。
Horng - liang lay, chia - chi chen and shu - tuan chiang. 2003. simultaneous analysis of nine components in “ byi - liang - tang ” by high performance liquid chromatography. the 12th international congress of oriental medicine. abstract p. 158
賴宏亮。 2003 。中草藥之基原?定、成分分析及產品之研發。藥用及香
精作物生產與利用研討會論文集, p . 36 - 44
Fuel ethanol, from lignocellulosic hydrolysates, as a kind of renewable clean energy source, attracted more and more attention
摘要以木質纖維素水解液發酵生產的燃料酒
精作為一種清潔的可再生能源引起人們極大的關注。
The leisure and cultural services department have contributed a selection of representative works by hong kong artists from the collections of the hong kong museum of art at the departures hall of the hong kong international airport
康樂及文化事務署以其轄下香港藝術館的珍藏,在香港國際機場離境層,陳列了三位著名香港陶瓷藝術家的
精作。
Illustrated with 34 representative works, among them ink paintings that assimilate traditional techniques of chinese art and others drawn from his unique series of zen paintings, the booklet accompanying this exhibition also contains an article, " the way of ink painting the origin and in search of zen ", which introduces l shoukun s theories of art
呂壽琨:新水墨畫展覽小冊輯錄了呂壽琨的水墨畫
精作共34幀,包括其秉承傳統的
作品和后來獨創的禪畫。並刊有專文水墨之道-溯源與尋禪簡介呂壽琨的創
作風格,分析呂氏從師古師自然走向尋禪的進程。
As a kind of food additive, meat flavour has a close relationship to food safety
摘要肉味香
精作為一種食品添加劑,與食品的安全性有著直接的關系。
In 1981 - 1982, she worked as a visting scholar in the department of clinical pharmacology at karolinska institute and department of bilolgical chemistry at pharmacia fine chemicals company in swecen. zhu is one of the pioneer chinese scientists worked in the field of pharmacokinetics
回國后,他又向who申請了"棉酚抗生
精作用的生化機制"研究課題,為其批準,獲其科研經費,並按時圓滿完成各項研究,受其好評。
Typical sperm, which has normal amounts of chromatin, can take part in fertilization ; however, atypical sperm, which has abnormal amounts of chromatin, or has no chromatin, ca n ' t take part in fertilization, but has nutritional function
典型
精子含有正常的染色質,因而能參與受
精作用;異型
精子含有不正常量的染色質,或不含染色質,因而不參與受
精作用,多具營養功能。
We also sought to determine whether we could induce human eggs to divide into early embryos without being fertilized by a sperm or being enucleated and injected with a donor cell
我們也想知道,卵子是否可以無需
精子的受
精作用,或不必去核再注入其他細胞核,就可以直接分裂成早期胚胎。
- 1, 4 - gt seems to play a multifunctional role hi normal cell physiology and has been associated with sperm - egg binding, cell - cell recognition, cell migration on basal lamina and neurite extension, embryonic maturation, rheumatoid arthritis, and cell development. hi this paper, it is studied on expression of the - 1, 4 - gt gene
細胞質膜上的- 1 , 4 - gt與
精子的受
精作用、胚胎形成、內分泌、神經元細胞的遷移、癌細胞的轉移、表皮細胞的增殖及自體免疫性疾病等方面都有著密切的關系。
In a similar experiment, however, we succeeded in prompting human eggs ? on their own, with no sperm to fertilize them ? to develop parthenogenetically into blastocysts
但在另一個類似的實驗,我們卻能讓卵子在未經受
精作用下,成功以孤雌生殖的方式發育到囊胚期。
January 16. the 18th amendment goes into effect at midnight. alcohol is banned as an illegal substance. organized crimes takes over distribution
1月16日,第18條修正案午夜起生效。酒精作為一種違法物質被禁止。有組織的犯罪集團介入銷售。