The life span of the data saved to a session is, at most, from the moment the user accesses a domain to the moment when a user times out after a preset amount of time of inactivity.
保存在会话中的数据的生命期，最长是从用户访问域的那一刻到用户在预设的一段不活动时间之后超时的那一刻。
Based on the model of multi-span slender rod, the moment equations and deflection equations of elevator rail with duplex safety gear were established and resolved in a complex state of stress.
结合双安全钳作用特点，以多跨度细长杆模型为基础，建立并求解了电梯导轨在复杂受力状态下的弯矩方程和挠曲线方程。
This paper has made use of the mo me nt distribution method to bring on the formulas of support moment of unequal span continuous beam less than or equal to four spans.
本文利用弯矩分配法推导出四跨以内不等跨连续梁支座弯矩精确值的算式。
For two Three-Columniation End moment Equations at neighbor points, moved out sidesway, it is Three-span moment Equation of frame that be relationship moments in three spans with load.
利用在连续两个结点上的三柱端弯矩方程，消去侧移分量产生刚架连续三跨的柱端弯矩与荷载关系的三跨弯矩方程。
The results indicate that the vertical bending moment of girders, especially the girders of middle span, are influenced more obviously by coherence effect than by local site effect.
研究结果表明：相干效应对主梁纵向弯矩影响比较大，尤其是中跨部位；而局部场地效应相对影响较小。
With the limitations of the maximal bearable bending moment and the positive lifting force, the controlling parameter curves of span and lifting Angle are then acquired to guide the safety operation.
以长桩结构能够承受的最大弯矩和吊点力不为负值作为限制条件，得出安全作业跨距和倾角参数控制曲线。
Due to the large span of the floor slab, the moment torsion of the beam, under the vertical load, is obvious.
由于板跨较大，竖向荷载使梁截面承受的扭矩较大。
The formulas of moment coefficient and connective stiffness coefficient single with the single span-layer frame under vertical loads are presented.
计算了单层单跨框架在竖向荷载下弯矩系数和连接刚度系数的函数公式。
The loading of a tubular busbar is equivalent to that of a large-span beam, and the stress on the cross -section is mainly the tensile stress of the dead weight bending moment with much deflection.
管型母线受力状况相当于大跨度的梁，截面上的应力主要是自重弯矩的拉应力，挠度比较大。
The quasi-moment method presented in this paper is based on the structural analysis of a multi-storied and single-span symmetrical frame.
本文以多层单跨对称框架的受力分析为例，提出了虚拟弯矩法。
Overrunning Speed Clutch is one of the key pats in impulseStepless Speed Regulators, and working capability depends on the control factor of its mechanism efficiency, twist moment and life - span.
超越离合器系脉动无级变速器的关键部件，其工作能力决定了整机效率的高低、输出扭矩的大小和耐用寿命的长短。
Concrete is poured on the upper part inside the steel box in the span-center bending moment area to solve the problem of the insufficient pressing area of concrete on the top of the steel box girder;
跨中正弯矩区钢箱内上部浇筑混凝土，可解决钢箱梁顶部混凝土受压面积不足的问题；
Concrete is poured on the upper part inside the steel box in the span-center bending moment area to solve the problem of the insufficient pressing area of concrete on the top of the steel box girder;
跨中正弯矩区钢箱内上部浇筑混凝土，可解决钢箱梁顶部混凝土受压面积不足的问题；
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