壳

The cylindrical shell of open circumambience with both ends simply supported and the cylindrical shell with clamped ends are analyzed, then the cylindrical shell of close circumambience with simple support and the other end clamped along straight edges are analyzed.

分析了两端简支的封闭圆柱壳、两端固定的封闭圆柱壳和两端简支直边固定的开敞圆柱壳的振动特性，同时研究了环向半波数对圆柱壳固有频率的影响，并给出了不同边界条件的振型图。

It mainly consists of SN trend Guan Yan geosyncline type rift moving for long time and EW trend Da-Hong-Shan original continental crust rift moving in the early proterozoic and Yuan Bian-E-Bian original continental crust rift moving in the Mid-Late Proterozoic.

首次提出元古宙该区的古大地构造性质为诞生于太古宙雏陆壳内及其斜坡的雏陆壳型三岔裂谷系，主要由元古宙长期活动的南北向昆阳地槽型裂谷和早元古宙活动的东西向大红山雏陆壳间裂谷与中晚元古宙活动的盐边—峨边雏陆壳间裂谷组成，并论证了它们的演化—运动史。

Under the fixed and clamped boundary conditions, a nonlinear differential oscillation equation with quadric and cubic items was presented by the Galerkin method, and a nonlinear free oscillation equation of the shallow reticulated shells with damage was solved.

基于Lematire等效应变损伤原理，计及扁球面网壳各个杆件的损伤影响，根据薄壳非线性动力学理论推导出含有损伤扁球面网壳非线性动力学方程和协调方程，在固定夹紧边界条件下，用Galerkin方法得到一个含二次和三次非线性振动微分方程，并对具有损伤扁球面网壳的非线性自由振动方程求解。

Then the single layer spherical, cylindrical, elliptic paraboloidal reticulated shell and double layer cylindrical reticulated shell are calculated on the large deformation stability respectively, which show the application of the development system on the large deformation stability analysis of space bar structures.

用所开发的系统对单层球面网壳、圆柱面网壳和椭圆抛物面网壳以及双层柱面网壳进行了大变形稳定性计算，说明了所开发系统的可应用性。

Results Trunk neural crest stem cells were successfully isolated and cultured. The immuocytochemcal result showed that the cells were nestin-and P75-positive. Trunk neural crest stem cells grew through adhering to chitosan fiber after inoculation. Under an electon microscope, the spindle-shaped trunk neural crest stem cells were proliferated and migrated along the fiber. The cells arranged side by side or linked by heads and tails in processes. The ends of S-100 positive cells were flat and expanded, adhering to the fiber as claw-shaped pseudopodium.

结果 采用神经管植块法培养的神经嵴干细胞，免疫细胞化学染色呈现nestin及P75双阳性，将其接种在壳聚糖纤维支架材料上，可见神经嵴干细胞贴附于壳聚糖纤维上生长；S-100免疫细胞化学染色显示，S-100阳性细胞突起的末端呈扁平状膨大；扫描电镜显示，壳聚糖纤维上的躯干神经嵴干细胞为梭形，呈现"端对端"、"肩并肩"排列，伸出爪形伪足贴附于壳聚糖纤维上。

Simulation result of the experiment shows that unloading and recovery process of PTCS is not consistent with the local stress redistribution and concentration.It can be divided into four phases:1.local stress unloads first in the middle of PTCS;2. stress continues to unload near the incident bar.3.Stress continues to unload near the transmission bar,the first and second layer PT buckling rumple disappear;4.the whole PTCS vibrates elastically.

对具体冲击实验的数值模拟结果表明：相变柱壳的卸载恢复过程在柱壳结构中是不均匀的，伴随着壳体局部应力释放和局部应力集中，可以分为以下四个阶段：1、柱壳中部发生弯曲变形的壳体应力首先释放，2、靠近入射杆端的壳体应力继续释放，3、靠近透射杆端的壳体应力释放，第一层与第二层相变屈曲皱褶消失，4、柱壳整体弹性振动。

FRAP method measured antioxidant capacity of vitamin C (as FeSO4 equivalents μg /μg) of 4.14, reflux extraction method extracted to the untreated mung bean shells, rich green bean shell GABA treatment, selenium-rich bean shell three kinds of material dealing with anti-oxidant capacities of 0.73,0.69,0.80, three peeled mung bean products are not detected because of the content extraction.

FRAP法所测维生素C抗氧化能力(以FeSO4当量计μg/μg)为4.14，回流提取法所提取到的未处理过绿豆壳、富GABA处理绿豆壳、富硒处理绿豆壳三种物质抗氧化能力分别为0.73、0.69、0.80，三种去壳绿豆产品均因所提取含量不足以检测。

Vehicle lubricants: Heineken Shell gasoline engine oil, Shell Rimula diesel engine oil, Shell Road, Lu Da X-100 engine oil, transmission fluid dynamics Shi, Shi Beili hyperbola gear oil, Shell tank Po.

壳牌喜力汽油发动机油，壳牌劲霸柴油发动机油，壳牌路路达 X-100 发动机油，动力施变速箱油，施倍力双曲线齿轮油，壳牌水箱宝。

The sound is different between normal duck eggshells and cracked duck eggshells when being knocked by stiffer materials; the sound of normal eggshells is very silvery and sonorous, while the sound of cracked eggshells is very toneless and tedious.

好壳蛋与损壳蛋在被其他物体碰撞时，蛋壳会发出不同的声音，好壳蛋蛋壳发出的声音清脆，而损壳蛋蛋壳发出的声音沙哑、沉闷。

We have more than 400 workers in the company, We are able to accomplish watchcase (including stainless steel watchcase, copper watchcase, alloy watchcase),watchstrap,watchdial, finished assembly etc a full set of production and processing independently, and comply with the relevant quality standards, Good quality, reasonable price.

在厂职工400余人，能够独立完成表壳(包括不锈钢壳、铜壳、合金壳)，表带，表面，成品表组装等全套生产加工，遵循相关质量标准，产品品质优良，价格合理。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。