By calculating large quantity of examples , this text studies earthquake resistant behavior of tapered portal frame with pined bases and analyzes its natural frequency , natural period of vibration and vibration mode . by comparing interior forces of pillar top , beam end and span midpoint in two conditions that seismic action effect participates combination of forces and not when portal frame is n ' t changed , ensure conditions that combination of seismic action effect has controlling f unction during tapered portal frame design , and tapered portal frame demands anti - earthquake design 本文通过大量算例分析，研究柱脚铰接楔形变截面门式刚架的抗震性能，并对其自振频率、振型进行了分析；通过比较地震作用效应参与荷载组合与不参与荷载组合两种情况下，梁柱截面尺寸不变时，柱上端、梁端、跨中截面处的内力大小，确定在什么情况下地震作用效应组合起控制作用，变截面门式刚架需要进行抗震设计。
The proposed function has same properties just as the ones of paper [ 1 ] , unifies the forms when the intervals have common endpoint or not , avoids the impact of the level and dimension of values and make the extension analysis be more objective , is continuous for all real field but the common one , gets the maximum value at the midpoint , and has more applicability 该初等关联函数具有与文[ 1 ]初等关联函数相似的性质，且统一了有公共端点和无公共端点区间类型，能消除量级和量纲的影响，使得可拓优度评价结果更客观，在除了公共端点外的全体实数域内连续且在中点取得最大值，并有更宽的适用范围。
After 50 nmol / l hntx - iv treatment for 5 min , the peptide didn " t effect the active and inactive time course of sodium currents and the steady - state activation of sodium channels , but it caused a 10 . 1 mv hyperpolarizing shift in the voltage midpoint of steady - state sodium channel inactivation on drg neurons 细胞5分钟后， ttx一s钠电流的激活与失活相以及通道稳态激活特征均无明显改变，但ttx一s钠通道能引起钠通道的半稳态失活电压有约10 . lmv的超极化漂移。 100二。
First , the basic raster graphics algorithms for drawing 2d primitives are introduced , including edge coherence and the scan - line algorithm of triangle , brush algorithm of thick line ( and its improved method ) and midpoint circle and ellipse algorithm ; and the current situation of the advanced algorithms is also involved . second , the mapping of high level programming language to hardware description language is described , some principles of the conversion of algorithm to state machine are proposed also ; then , the implementation of basic graphics in hardware is discussed in detail , the state machines are drawn in the paper , and the interfaces of hardware are defined , block diagrams too , and the advanced algorithm of conic is proved ; finally , some issues about test are described , the results of simulation and synthesis are given in the last , and some detailed data are displayed in the appendix 首先介绍了现有的基本图形生成算法，包括三角形边相关扫描算法，宽直线的线刷子算法及其改进和圆形、椭圆的生成算法，同时介绍了加速算法的研究现状；然后，讨论了高级语言描述到硬件描述语言的映射，提出了算法到状态机抽象的规律；接着具体讨论了基本图形的硬件实现，给出了各算法的状态机图，接口定义和实现框架，并且从理论角度给出了二次曲线加速算法的证明：最后采用软件工具进行测试验证，给出了模拟、综合实现的结果，并在附录中有详细的实验结果数据。
According to the test results of 15 large size specimens of sfrc four - pile caps , crack status , the midpoint flexibility of pile caps bottom , concrete strain side and steel strain bottom are observed , and primary influencing factors of sfrc four - pile caps are analyzed by changing bulk factor , effective thickness , quantity of distributed steel and steel laying mode 依据15个大尺度钢纤维混凝土四桩承台试件的试验情况，通过改变钢纤维体积率、承台有效厚度、配筋量及配筋方式，观察和记录了桩承台裂缝开展与分布、承台底部中点挠度、侧边混凝土应变和底部受拉钢筋应变，分析了影响钢纤维混凝土四桩承台承载能力的主要参量。
Similar to hntx - iv , 100 nmol / l hntx - v did n ' t effect the active and inactive kinetics of currents and did n ' t have the effect on the active threshold of sodium channels and the voltage of peak inward currents . however , 100 nmol / l hntx - v caused a 7 . 7 mv hyperpolarizing shift in the voltage midpoint of steady - state sodium channel inactivation 1 / liintx一v也不影响ttx一s钠电流的激活相和失活相，对钠通道的激活闽值和最大激活电压也无明显改变，但能引起钠通道的半稳态失活电压有7
Abstract : the multifunctional inverter power sourcethe handy inverter welding , plating & charging manchine , developed with advanced inverter and micro - electronics control techniques , adopts “ half - bridge power expansion supply midpoint voltage autocontrol setting ” , and technically and effectively having solved inverter subvision of inverter power expansion circuit for leaning magnetism , reliability of high - power inverter setting , achives combination of constantcurrent and constantvoltage export , and realizes low - voltage dc and high - voltage ac double power supply 文摘:运用先进的高频逆变技术和微电子控制技术设计研制的逆变式多功能电源便携式逆变焊镀充电多用机，采用“半桥式功放级供电中点电压自动控制调节装置” ，在技术上解决了逆变功放电路因偏磁而造成的逆变颠覆，有效地解决了大功率逆变器的可靠性问题；进行多种外特性的综合设定，实现了恒流与恒压输出的合一；与传统焊机相比，实现了开环和闭环状态下都互不影响的低压直流电瓶和高压交流双供电
Jean hunter , a professor of agricultural and biological engineering at cornell university , is at the midpoint of a three - year study funded by the national aeronautics and space administration to develop menus for months - long space missions to the moon and mars , where astronauts will grow and prepare their own food 康奈尔大学的农业和生物工程学家珍涵特，现正进行一项由太空总署所赞助的三年研究计画，这个研究已经进行了一半，是要为长达数月的月球和火星之旅设计菜单，而且太空人将要自己养植和料理食物。
