The tests show the system levels the relevant standards set by atp and iso , which are proved to be a successful one . airtightness test shall be carried out when the temperatures inside and outside the refrigerated containers should be stabilized within 3k of each other and should both be within the range 288k to 298k 进入实验工况后，温度调节精度为0 . 3 ，环境温度场的梯度值不超过1k ，而箱内温度场的梯度值一直维持在2k以内，该集装箱的漏热率u为43 .
Electro - optical curves for lc cells have been analyzed and it has been shown mat a large attenuation range and a shallow attenuation slope can be achieved simultaneously for a variable optical attenuator based on a parallel - aligned lc cell with an appropriate surface anchoring strength . as compared with the existing liquid crystal - based voa structure ( using two cascaded lc cells with a particular material ) , the present structure is simple and has no special requirement for the lc materials 提出了基于弱锚定平行排列液晶盒的可变光衰减器(衰减范围大、衰减曲线下降平缓以保证调节精度) ，与己有液晶型可变光衰减器结构(选用特定液晶材料、两个液晶盒级联结构)相比较，本论文提出的基于弱锚定平行排列液晶盒的可变光衰减器结构简单，同时对于液晶材料无特殊要求。
The phase of base - wave and harmonic was adjusted separately and the accuracy is 0 . 1 . the content of harmonic is from 0 to 99 % and the amplitude of all six signals was adjusted separately from 0 to 2v with its accuracy of 0 . 1 mv . the frequency is from 40 to 70hz and the system can be used as signal generator or parameter measurement only 系统中含有高达21次谐波成份的三相信号由软件产生；基波和各次谐波的相位单独可调，调节精度为0 . 1度，各次谐波含量0 99可调；各路输出信号幅度在0 2v内单独可调，调节精度0 . 1mv ；输出信号频率在40 70hz可调；可单独作为谐波信号源或测量系统。
Through small signal stability analysis and transient stability simulation in a typical hvdc system ( epri 36 ) , the results show that some characters of closed - loop system on the basis of associated feedback control , such as angle stability , voltage accuracy and small signal stability , are better than those of avr + pss 通过一个典型交直流电力系统（ epri - 36系统）的小干扰稳定计算和暂态仿真表明，关联测量分散励磁控制下的闭环系统在功角稳定性、电压调节精度以及小干扰稳定性方面均优于常规励磁附加pss 。
