纲

Biology a taxonomic group ranking between a phylum and below a class or subclass.

居于门和次纲之间的分类组。

As a windfall of such analysis , It points out that physical constant of permittivity in vacuum actually is an constant without physical dimension .

给出了常见的50余个物理单位和物理量的时空组态和时空结构。作为一个分析结果发现，真空介电常数实际上是一个无量纲的物理常数。

Firstly the dimensionless planar motion model of SGKW was established;then the optimal control problem of shortest time coplanar hit orbit was transformed into two-point boundary value problem by means of Pontryagin maximum principle .

首先建立了SGKW的无量纲化平面运动模型，然后利用庞特里亚金极大值原理将时间最短共面打击轨道的最优控制问题转化为两点边值问题。

According to the requirement of a minimum-fuel-consumption, a method of coplanar hit orbit optimization design for SGKW was studied. The dimensionless planar motion model of SGKW was founded, and the optimal control problem of minimum-fuel-consumption coplanar hit orbit was derived into two-point-boundary-value problem according to Pontryagin maximum principle.

针对燃料最省要求，研究了SGKW共面打击轨道优化设计方法，建立了SGKW的无量纲化平面运动模型，利用庞特里亚金极大值原理将燃料最省共面打击轨道的最优控制问题转化为两点边值问题。

The Celegians are a species of intelligent scyphozoans, appearing as floating brains trailing a cluster of prehensile tentacles.

塞莱吉亚人是一种钵水母纲的智慧种族，看起来就像漂浮的大脑曳挂着一串缠卷的触须。

They form the key link in our work for the present period.

这是我们这一时期工作的纲。

Qualitative analysis of the influence of the strength of anisotropy,dimensionless latent heat,and noise factor on the shape of crystal growth is given.The results show that the velocity of principal branch growth increases as strength of anisotropy increases and the branch structure is very strongly dependent on strength of anisotropy;as ...

结果表明，枝晶主干生长速度随着各向异性强度的增大而增大，并且枝晶结构强烈依赖于各向异性强度；随着无量纲潜热的增大，晶体生长过程中枝晶结构特征愈加明显；扰动对枝晶结构特征有一定的影响，随着扰动因子的增加，枝晶间竞争生长加剧。

Namely,the varialle will be divided into groups by factor analysis first,then going along principal component evaluation to the variable of each group separately.

而在综合评价中，应用主成分分析方法既可以消除各指标不同量纲的影响，也可以消除由各指标之间相关性所带来的信息重叠。

Lamellarins are a group of marine active pyrrole alkaloids isolated from prosobranch mollusks. So far, over 40 lamellarins have been isolated and identified.

片螺素是一类从前腮亚纲软体动物中分离的具有较强生物活性的海洋吡咯生物碱，迄今已发现40余种。

A flagellated protist that ingest s food and lacks chlorophyll.

动鞭亚纲原生生物一种有鞭毛的原生生物，它摄取食物并缺乏叶绿素

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。