stillness population

The theoretic solutions of position response characteristic of two-dimensional tetra-lateral PSD illuminated by the static and moving light source were solved.

推导出在四边形二维PSD光源静止照射和连续扫描照射下的位置响应特性理论解,比较两种光源照射方式下引起相对位置变化,讨论了光源扫描速度对探测光入射位置信息的影响,得出结论:在两种光源照射方式下,二维PSD探测光入射位置存在严重的非线性,但是响应时间比一维PSD短。

Use static elements or relative static elements in the changing graph to get the main moving point and its relations with other known conditions to correctly calculate the orbit equation.

利用变动图形吕的静止或相对静止因素 ,抓住主要动点及其与已知条件的联系 ,正确求出轨迹方程 。

Using Lorentz alterrnate, this paper bears out force of motion electric charge acting on static charge.

文中利用洛仑兹变换给出了运动电荷作用在静止电荷上的力。

Discussion was made for productive features of key static equipment in urea production plant,commentary was made for the technical reformation process and technical development direction for the equipment of urea reactor,pre-separator,first stage of heater,rectifying column,evaporating separator etc.

论述了尿素生产装置中关键静止设备的生产特性,对尿素合成塔、预分离器、一段加热器、精馏塔、蒸发分离器等设备的技术改造过程和技改发展方向进行了评述。

The experiment has studied the effect of two submerged plants -- Hydrilla verticillata and Vallisneria spiralis to suspended solid in static water and compared them with the blank cell.

实验研究了两种典型的沉水植物——轮叶黑藻和亚洲苦草在静止水体中对悬浮固体的作用,并与空白组进行了比较。