浮囊

The tension stress distribution of the aerostat envelope under windless condition is obtained using the FE model, and critical regions with high stress are pointed out. The calculated value of tethering force fits well with the theoretical one. The results are instructive for the safety evaluation and design of aerostat structures.

应用此技术建立了无风载条件下浮空器囊体张应力分布的有限元分析模型，给出了囊体的张应力分布情况并指出危险应力区域，对系留力的计算值与理论值吻合较好，计算结果对浮空器结构安全评估及设计具有一定的理论指导意义。

A finite element model is proposed to calculate the mechanical state of a moored aerostat system. The difficulty in matching the loads of the tethers is overcome by releasing the tether constraints and applying the load step by step. The causes of non-convergence during computation is investigated and solved by modifying the criterion appropriately.

针对浮空器地面系留系统采用多级系绳集束设计导致有限元建模中系留力难以施加的问题，提出了分步加载，对系绳节点逐级建立载荷匹配关系的建模技术；对囊体局部应力集中导致计算难以收敛的问题进行了分析并提出解决方法。

The giant jellyfish exhibit two types of reproduction, one is asexual reproduction, including fertilized eggs, planula, scyphistoma, podocyst, strobila and ephyra; the other is sexual reproduction, including medusa or jellyfish, typically solitary, pelagic.

大型水母的生活史中有明显的世代交替现象，受精卵，浮浪幼虫，螅状体，足囊，横裂体到碟状体的幼体发育阶段属无性世代，幼蜇发育到成蜇阶段属有性世代。

The grey-eyed morn smiles on the frowning night, chequering the eastern clouds with streaks of light, and flecked darkness like a drunkard reels from forth day's path and Titan's fiery wheels: Now, ere the sun advance his burning eye, the day to cheer and night's dank dew to dry, I must up-fill this osier cage of ours with baleful weeds and precious-juiced flowers.

黎明笑向含愠的残宵，金鳞浮上了东方的天梢；看赤轮驱走了片片乌云，像一群醉汉向四处狼奔。趁太阳还没有睁开火眼，晒干深夜里的涔涔露点，我待要采摘下满箧盈筐，毒草灵葩充实我的青囊。

But in turn, this means that there seems to be no natural law for the evolution of swim bladders!

而反过来，这意味着对浮囊的进化来说似乎没有自然法则！

So swim bladders evolved by further natural selection.

因此说，浮囊是通过深层的自然选择演化出来的。

They will then be put in a specially designed float tank.

然后放在特制的浮囊。

It was poised, preadapted by chance, no design, to function as a swim bladder.

没有经过计划，它只是偶然地稳定下来，产生了预适应性，起到了浮囊的作用。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。