Ac small signal model and the operating principle of forward converter with active clamp are analyzed in this paper . the superiority of fac is obtained by comparing three typical kinds of methods of magnetic reset for forward converters 本文结合应用有源钳位正激变换器，对有源钳位正激变换器从电路的工作模式到小信号模型建立进行了深入的分析。
Accordingly , the next day , i went out with my dog , and set him upon the goats ; but i was mistaken , for they all fac d about upon the dog , and he knew his danger too well , for he would not come near them 一月二日照着昨天的想法，我今天带狗外出，叫它去追捕那些山羊可是，我想错了，山羊不仅不逃，反而一起面对我的狗奋起反抗。狗也知道危险，不敢接近群羊。
Results : part 1 effect of iron on contraction in rat endothelium - denuded aortic rings ( 1 ) ferric ammonium citrate ( fac ) ( looumol / l ) caused a phasic response with an initial transient contraction followed by relaxation in thoracic aortic ring （ l ） 100pmol几拘磅酸铁（ ferricammoniumcitrate ， fac ）对血管具有直按收缩效应，可引起大鼠主动脉环发生相位性收缩。
Pretreatment with l - arginine ( l - arg ) before incubation with fac could not reverse the inhibition of relaxation response to ach completely . ( 2 ) in endothelium - intact aortic rings , l - arg could relax the pe preconstricted vessels （ 2 ）正常含有内皮的主动脉环在pe预收缩后，给予不同浓度的l afg可引起血管舒张；铁孵育后， l afg引起的舒张幅度显著减小（ p 0刀5 ） 。
By convention , the government responds to a foreign affairs committee report , specifically addressing each conclusion and recommendation , via command paper published within two months of publication of the fac s own report 依照惯例，政府要对外事委员会的报告做出回应，而且是要对报告中的每一项结论和建议都要给予回应，具体做法就是在报告发布后两个月之内发布政府对此的施政报告。
After successful completion of the fat , thales communications shall issue and submit to the buyer ' s signature a factory acceptance certificate ( hereafter the " fac " ) , which shall be signed by the buyer not later than two ( 2 ) days from its submission thereof 在成功的完成了fat之后，泰雷兹通信公司应出具并提交给买方一份工厂验收合格证（以下称“ fac ” ） ，此验收合格证应由买方在提交后两日之内签字。
The method to obtain the equivalent inductance of im is proposed , and the small - signal model of the peak - current controlled im - fac converter is founded . based on the presented small signal model , the parameter design of the compensator is accomplished 提出im中电感的等效方法,依据电感等效值和建立的峰值电流控制fac变换器的小信号模型完成了采用峰值电流控制的im - fac变换器的小信号分析和补偿器设计。
It is shown that under the action of the shock , the region current moves towards the midnight , accompanied by a successive occurrence of two fac structures : an anomalous fac pair of opposite direction to the region current and a new region current of the same direction 模拟结果表明，在激波的作用下，电离层区电流系统向子夜方向运动，在向阳侧相继出现与原区电流反向的异常场向电流对和同向的新生区电流对。
The background interplanetary magnetic field is spiral with a vanishing south - north component , the initial ionosphere is dominated by the region field - aligned current ( fac ) and the corresponding dawn - dusk electric field , and the interplanetary shock collides with the earth along the sun - earth line 背景行星际磁场为螺旋场，南北分量为零；初始电离层由区场向电流和相应的晨昏电场所主导；行星际激波沿日地连线方向撞击地球。
Chapter one centers on the significance of the - ory and practice of the study of the fluctuation of the real estate cycle , and take cognizance of its objective inevitability as well as controlablity because of its fluctuation affected by variety fac - tors , so the government can keep the stable develop - ment of the real estate for a long time by control - ling its impacting factors 第一章重点论述了房地产周期研究的理论和现实意义：通过对房地产周期波动研究，认识到房地产周期有客观必然性的一面，同时其波动又受各种因素影响从而有可调控的一面，因此政府可通过对各种影响因素的调控达到相对调控房地产周期的目的，从而保持房地产“长期、稳定、健康发展” 。
