有角的

Based on varying process of generator terminal parameters after excitation fault, shortages of excitation protective principle of static stability boundary and asynchronous impedance boundary are analyzed. It proposed that excitation fault research relates to large-disturbance stability. Because dynamic power-angle character of generator after excitation fault is non-sinusoidal, there are differences between dynamic power-angle character and static state power-angle character. So it isn't ideal to protective operation result based on small-disturbance stability and static stability boundary criterion. At the same time, it proposed that asynchronous boundary impedance criterion is a constant reactive power circle moving adown j Xd′. It can ensure complete loss-of-excitation generator measuring impedance enter into the circle, but can't ensure the other condition measuring impedance including impossible losing synchronism enter. So loss-of-excitation protection would be maloperation when system voltage drops short and recovers or generator rejects load.③Based on stability principle, it puts forward setting conditions and calculation method of generator loss-of-excitation protection by direct measuring power-angle.

以励磁故障后发电机端的相关参数的变化为基础，通过对以静稳定边界和异步阻抗边界作判据的两类三种现行励磁保护在原理上存在的缺陷分析，发现：励磁故障是一个大干扰稳定性问题，励磁故障后的发电机的动态功角特性与静态功角特性有很大的差异，已远非正弦曲线，因此基于小干扰稳定性原理、以静稳定边界作判据的保护必然动作不理想；异步边界阻抗判据是一个下移j Xd′的等无功阻抗圆，它可以保证完全失磁后的发电机测量阻抗能进入该阻抗圆，但不能保证完全失磁之外的其它状态不会进入该阻抗圆，因此在系统电压短时下降或发电机突然甩负荷等情况下可能启动该保护使之误动。

At present, several definitions are available for the acetabular anteversion and inclination, whereas there are different expressions for one definition.

目前髋臼前倾角和外展角有多种定义，即使对于同一种定义，也有多种不同的表达方式。

Jun companies are relying on sophisticated tools in Taiwan's Changhua with the production base has been 20 years in the thread cutting tool manufacturing experience to provide timely to clients, there Jun products include silk thread attack, thread cutter, sheet metal screw hinge (Banya , Pill-ju), dental sheet metal films, the cutting tools have been cut from the blade angle gap with knives and special materials are selected tungsten steel materials, life expectancy than the average 10 times the number of long knives.

公司依托有晙精密工具在台湾彰化设有的生产基地已有二十于年生产制造螺纹切削刀具经验，能够及时提供给客户的有晙产品包括螺纹丝攻、螺纹铣刀、螺纹铰钣、牙钣片，各项切削刀具都经过切刃离隙角处理，且刀具材质均选用特殊钨钢材质，寿命比一般刀具长数十倍。

Investigation showed that the road Tai'an City Green application of a total of 70 plants, of which 22 species of street trees, with the main species Sophora japonica, P.tomentosa, wax, paulownia, privet, few hairs; Green belt 50 kinds of plants, including Magnolia, Lagerstroemia, lobular privet, Purple BARBERRY lone, oriental arborvitae, cedar, readleaf cherry plum in vitro, pomegranates, Forsythia, Di-tang, and Rose Hosta such perennial flowers.

调查表明，泰安市道路绿化应用的植物共有70多种，其中行道树22种，主要树种有国槐、毛白杨、白蜡、泡桐、女贞、五角枫等；绿化带植物有50 多种，主要包括白玉兰、紫薇、小叶女贞、紫叶小檗、龙柏、侧柏、雪松、紫叶李、石榴、连翘、棣棠、玉簪以及月季等宿根花卉。

This horn had eyes like the eyes of a man and a mouth that spoke boastfully.

这角有眼、像人的眼、有口说夸大的话。

The representative families are Dryopteridaceae, Athyriaceae, Polypodiaceae, Thelypteridaceae, Selaginellaceae and Aspleniaceae. The main genera are Dryopteris, Selaginella, Asplenium, Arachniodes, Pteris, Allantodia and Plagiogyria. The top families' distribution types are cosmopolitan and pantropic ones, the main genera are pantropical ones, while species distribution type belong to the east Asia type and represents the feature of subtropics transition to warm temperated areatype. As for the order of closeness, the sequence of pteridophytes floristic relations between Songyang and the adjacent regions goes as Southwest China, South China, Central China, Japan, North China, Northwest China and Northeast China. The six upland pteridophytes next to Songyang can be put into the same natural flora because of its closest relationship. But compared with other 11 upland fern flora in China, fern in Songyang is not rich enough. There are 37 species endemic to China in Songyang.

结果表明，松阳蕨类植物共有38科72属161种7变种；优势科为鳞毛蕨科、蹄盖蕨科、水龙骨科、金星蕨科、卷柏科、铁角蕨科，优势属为鳞毛蕨属、卷柏属、铁角蕨属、复叶耳蕨属、凤尾蕨属、短肠蕨属、瘤足蕨属；科的分布以世界分布和泛热带分布为主，属的分布以泛热带分布为最多，种以东亚分布类型为主，特别是中国—日本分布类型最多，表现出亚热带向暖温带过渡的特点；本区与邻近地区蕨类植物区系关系的密切程度由大到小依次为西南、华南、华中、日本、华北、西北、东北；与邻近的6个山地蕨类植物区系的亲缘关系密切，可以划为同一自然区；与国内11山地蕨类植物区系相比，松阳的蕨类植物丰富程度不高；松阳拥有37种中国特有蕨类植物及一些珍稀蕨类植物，有较高的保护价值。

The results show that cutting tools and cutting parameters had an important influence on the quality of the fiber in the planing process of metal fiber. The larger rake angle and appropriate clearance angle of tools favored to fabricate metal fiber. Back engagement influenced the forming process of metal fibers most greatly, feed rate and cutting speed varied little.

研究结果表明：在金属纤维刨削成形过程中，刀具参数和切削用量对纤维的质量有重要影响，较大的刀具前角和合适的刀具后角有利于纤维的成形，而背吃刀量对金属纤维的成形影响最大，切削速度和进给量的影响则不明显。

Based on Mononobe-Okabe＇s postulation and the reasonable consideration for the restricted pore water, a first-order differential equation of the dynamic active earth pressure on rigid retaining walls with submerged backfills in the traaslational movement mode under earthquake loads is set up by using the method of level-layer analysis.

基于Mononobe-Okabe假定，在合理考虑土体孔隙中受限水含量的基础上，利用水平层分析法推导了填土中有地下水时刚性挡土墙平移模式下的动主动土压力强度的一阶微分方程，并求得非线性分布解：探讨了地下水位、受限水含量、填土的内摩擦角、墙背的摩擦角和地震系数等参数对土压力强度分布、合力作用点高度以及倾覆力矩的影响。

The results show that the flap hinge spring rate has a great effect on helicopter stability and control, but precone and prelag angle,lag hinge spring rate and blade lag motion can be negligible...

分析结果表明：旋翼的预锥角和预掠角对直升机全机的稳定性和操纵性的影响可以略去不计，而桨叶根部挥舞方向上的弹性约束刚度对直升机全机的操纵稳定性有较大影响，摆振方向上的弹性约束刚度和桨叶的摆振运动对直升机稳定性的影响不大，可以略去不计。

On the basis of the modeling and analyzing of the transmission system of the PQS-3-D elevator for car in the preamble, this article analysis the reason of the small difference of the angular speed, angular acceleration, angular displacement curve between the bilateral symmetry components. Actually, it is the result of that the torsional rigidity of the bilateral drive shafts are different, therefore has made the revision suggestion to the drive shaft parameter.

在对PQS-3-D型汽车专用升降机传动系统建模分析的基础上，分析左右对称传动构件的角速度、角加速度、角位移曲线在系统起动时间内有较小差异的主要原因，发现是由于左右传动轴的扭转刚度系数不同造成的，故对传动轴的参数做了修改建议。

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。