The paper discusses the relations between parallel vector fields and Jacobi fields in a complete Riemannian manifold, and proves that there exists infinite closed geodesics in a local symmetric space which is orientable, compact, nonsimply connected and with nonnegative sectional curvature.
讨论了曲率定号的完备黎曼流形上的平行向量场与Jacobi场之间的关系;证明了紧致的偶数维具非负曲率的非单连通局部对称空间上存在无穷多条长度一样的闭测地线。
The Reciprocity Between Parallel Limited Length Current Carrying Straight Leads;
平行有限长载流直导线间的相互作用
Long-distance and Parallel Charged Transmission Line s Rock Digging Method;
长距离平行带电线路的岩石开挖方法
Design for the instrument of collating the parallel of multi-axis optical system with video output;
具有视频输出的多光轴光学系统平行校正仪设计
Architectural appearance is the new balance reached between cross and parallelism ,which is the target and goal of the constant change of the appearance constitute ,as well as means the new relations of existence , and at the same time furthers.
建筑形态就是在“交叉”“平行”间不断达成的新的平衡,这正是形态构成不断变换的目的与目标,也意味着人与自然及人与人之间新的存在关系,并推动着现代人的审美观念向更高层次发展。
By analyzing the lexical structure and semantic characteristic of parallelism in literary language,this essay tends to show the beauty of balance,rhyme,imagery and style created by the figure of speech,parallelism.
本文将从分析文学语言中“平行”修辞格的句法结构、语义特点出发,研究“平行”修辞格产生的均衡美、节奏美、意象美和气势美等美学特征。
In the poem Mending Wall,using the ingenious structure arrangement and the skills of repetition,parallelism and symbolism,Frost incisively and vividly shows the complicated relation between people and people or between people and the society in modern western civilization only by simple language.
在《修墙》一诗中,他采用匠心独运的结构安排以及平行、重复、象征等写作技巧,仅用简单、通俗的语言就淋漓尽致、生动地表现了现代西方文明社会中人与人、人与社会之间复杂的关系。