Thirty and ninety days feeding tests 天和90天喂養(yǎng)試驗
Feeding test for 90 days 天喂養(yǎng)試驗
Feeding test for 7 days 天喂養(yǎng)試驗
Experiment results show that the high power supply quality rectifier meets supply need of ac drive reciprocal power fed test rig 實驗結(jié)果表明,該高供電品質(zhì)整流電源符合交流傳動互饋試驗臺的供電要求。
Based on slip frequency control strategy for the mutual - feed test bed , it is studied the regulation of traction motor speed as well as the analog load resistance torque with analog load 摘要針對互饋試驗臺,基于轉(zhuǎn)差頻率控制策略,研究了牽引電機(jī)側(cè)速度的調(diào)節(jié)和負(fù)載模擬側(cè)阻力矩的調(diào)節(jié)。
Through the developed mutual - feed test bed , it is proven that the control program features accurate speed regulation and is capable of load simulation at different locomotive working modes , which reaches the requirement of high power test system 最后通過研制的互饋試驗臺證明該控制方案可以精確調(diào)速,同時能夠模擬機(jī)車各種工況下的負(fù)載,滿足大功率試驗系統(tǒng)的要求。
The author analyzed test signals and steps of each display test standard , and drew the meaningful contents for fed tests . finally , test technologies and evaluation methods were creatively established . the test standards and evaluation methods were verified by lab - made 25 inch fed panel 根據(jù)所提出的fed整機(jī)和顯示屏參數(shù)的測試方法,建立fed整機(jī)參數(shù)和fed顯示屏像元的光電特性的測試系統(tǒng),包括測試儀器設(shè)備、信號源和供電電源,實際測試了本實驗室制作25英寸彩色fed顯示器。
By analying the requirement of traction characteristics of rectifier in ac drive reciprocal power - fed test system , in this paper , the research on high power supply quality rectifer is conducted around topology and mathematical modeling , high power supply quality rectifer ' s control methods are summarized . predicted current control based on space vector pwm in two - phase stationary coordinates is proposed and used in this paper 本文分析了交流傳動互饋試驗系統(tǒng)牽引特性對整流電源的要求,對高供電品質(zhì)整流電源的拓?fù)浣Y(jié)構(gòu)和數(shù)學(xué)模型進(jìn)行了研究,總結(jié)了高品質(zhì)整流電源的控制方法,闡述了本文采用的兩相靜止坐標(biāo)系下基于空間矢量脈寬調(diào)制的預(yù)測電流控制方法。
The insect feeding test indicated that the development of lymantria dispar was clearly put off , in which the insects feeded transgenic plants were 2 ages , when the insects as the control were 4 ages after treating 15 days . besides , the insect growth was restrained , that the weight of insect as control was 9 . 7 and 6 . 4 times compared to the treated ones . it also resulted that the foreign gene could normally express in the transgenic plants by displaying insect resistance in a certain degrees 舞毒蛾幼蟲發(fā)育推遲, 15天時處理為4齡,但對照仍為2齡,發(fā)育推遲了2個齡期;舞毒蛾生長受到抑制,對照的體重為處理的9 . 7倍與6 . 4倍,外源基因嚴(yán)重抑制幼蟲的生長,說明外源基因在轉(zhuǎn)基因白樺中能夠正常表達(dá),轉(zhuǎn)基因植株表現(xiàn)一定的抗蟲性。