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1)  wrong tetrahedron
四面体穿刺
2)  Integrated piercing
整体穿刺
1.
Integrated piercing is the technology for manufacturing solid fabric of fiber.
整体穿刺是一种制造纤维立体织物的工艺技术。
2.
The paper analyzes the interaction between woven fabric and needle in the integrated piercing process of orthogonal laminated woven fabrics, proposes and establishes fiber bending elongation and elongation breakage model,and talks over the structure parameters influencing fiber bending elongation.
分析了正交叠层机织布整体穿刺工艺机织布与钢针的相互作用 ,提出并建立了纤维的弯曲伸长及伸长断裂模式 ,讨论了影响纤维弯曲伸长的结构参数。
3.
This paper analyzes the mechanism of fiber bending and elongation of integrated piercing process, and builds the mechanical model of steely needle, then discusses the increasing and decreasing relation between maximum bending stress, maximum shear stress and the resistance that acts on needlepoint and radius and length of needlepoint, then optimizes the form of needlepoint according to the result.
分析了整体穿刺过程中纤维弯曲伸长机理 ,建立了钢针的力学模型 ,分别讨论了作用在针尖上的最大弯曲正应力、最大剪切应力以及穿刺阻力与针尖半径和针尖长度之间的关系 ,然后根据获得的结果对钢针针尖的形状进行了优
3)  Pricking body position
穿刺体位
4)  puncture of extremity vein
四肢静脉穿刺
1.
Puncture of external jugular vein was carried out for the test group(32 cases),and puncture of extremity vein was carried out for control group(30 cases).
[方法]将62例老年危重病人随机分为实验组和对照‘组,实验组32例采用颈外静脉穿刺,对照组30例采用四肢静脉穿刺。
5)  tetraploid Robinia pseudoacacia
四倍体刺槐
1.
Study on softwood cutting of feed tetraploid Robinia pseudoacacia;
饲料型四倍体刺槐嫩枝扦插试验初报
2.
Megaspore and microspore genesis and the development of gemetophytes in tetraploid Robinia pseudoacacia;
四倍体刺槐大小孢子发生和雌雄配子体发育
3.
The Anatomic Evaluation of Plantlets on Fodder-type Tetraploid Robinia pseudoacacia.
饲料型四倍体刺槐组培苗的解剖学鉴定
6)  Robinia pseudoacacia
四倍体刺槐
1.
Studied on the oxidation enzymes activities in the periods of making roots in the green branch of Robinia pseudoacacia;
四倍体刺槐扦插生根过程中氧化酶活性的变化
2.
Effects of different precipitable techniques on nutrient composition of Robinia pseudoacacia leaf protein;
不同沉淀方法对四倍体刺槐叶蛋白营养成分的影响
3.
Primary Report of Robinia pseudoacacia Planting Experiment;
四倍体刺槐造林试验初报
补充资料:四面体数
四面体数
四面体数

四面体数三角锥体数是可以排成底为三角形的锥体(即四面体)的数。四面体数每层为三角形数,其公式是首n个三角形数之和,即n(n + 1)(n + 2) / 6。其首几项为:1, 4, 10, 20, 35, 56, 84, 120...(oeis:a000292)

四面体数奇偶排列是“奇偶偶偶”。

1878年,a.j. meyl证明只有3个四面体数同时为平方数:1, 4, 19600。唯一同时是四面体数正方锥数的数是1(beukers (1988))。

它们可以在杨辉三角每横行从右到左或左到右的第4项找到。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条