As regards the confused fee charging modes , the paper suggested a compromise charging mode that gave consideration to both the existing standard of advertisement customers and the practical situation of web media , based on current conditions 对于混乱的收费模式，本文建议应考虑到广告客户的自身水准和网络媒体的实际情况，从实际出发采取一种兼顾二者利益的折中的收费模式。
There exits contradiction between the qos guarantee and complexity of channel assignment algorithms . and the channel search time is correlated with the channel utilizing efficiency . so each solution plan is the compromise among these factors 因为在系统的通信服务质量和信道分配算法执行的复杂性之间存在矛盾，而且它与信道搜寻时间和信道利用率也有关系，所以任何一种解决方案的提出总是不同矛盾折中的结果。
Due to the hardware characteristic ' s limitation , such as the poor speed of a / d , d / a conversion and dsp process , the most part of sr system adopt middle course . that is to say , by using the special digital converter or running relevant arithmetic , it converts the radio signal to intermediate frequency signal and completes the base - band signal process that is n ' t the veriest sr and is named " software defined radio ( sdr ) " 由于受到硬件性能如a d 、 d a及dsp芯片处理速度的限制，目前的软件无线电系统多采用折中的实现方案，增加专用的数字变频器或者运行数字变频算法，将射频信号变频到中频，然后再进行基带信号处理，这样的软件无线电系统又被称之为“软件定义无线电” ，它并不是真正意义上的软件无线电。
Abstract : this paper developed time domain integral constraints on error response for siso feedback control systems caused by nominal plant ' s near cancellation of stable pole - zero near the j - axis . these integral constraints should be satisfied by any feedback control systems . these integral constraints give new insight into the inherent trade - offs . it will result in the settling time longer or the infinite norm of the error response larger when there are near cancellations of stable pole - zero near the j - axis . hence , when feedback control systems are designed , it is necessary to avoid the compensator ' s poles and zeros nearly cancelling the nominal ' s zeros and poles ( even if these poles and zeros are stable ) 文摘:导出了单输入单输出反馈控制系统误差响应基于名义系统稳定的零、极点近似相消的时间域积分约束,此积分约束是任何反馈控制系统均应满足的.这一约束给出了单输入单输出反馈系统固有折中的新的观点.名义系统稳定的零、极点近似相消的存在导致反馈控制系统的调节时间延长或者误差响应的无穷范数变大.因此,在反馈控制系统设计中,尽量避免补偿器的零、极点与名义系统的极、零点近似相消(即使这些零、极点是稳定的)
