Models of networked control systems with long delay are presented in three cases , namely , the delay varies within the sampling time ; the delay is random tad in order ; the delay is random hat oat of order 摘要分析了长延时网络控制系统的3种情况:延时的变化范围小于一个采样周期;延时随机且有序,延时随机且无序。
The rotating and / or shifting procedures are presented in detail , and the movement of the time - varying sliding surface is obtained quantitatively at every sampling time by taking advantage of the range of the sliding mode band 给出了滑模面旋转和平移的具体过程,同时由于滑动模态区的宽度固定,可以定量地确定出滑模面在各个采样时刻的变化量。
When hypothetical conditions of sampling time and data precision are sufficed , a / d574 was choosed . not only the a / d574 has low cost and convenient interfaces , but also because the a / d apply more converters and the information of it gathering is handy A d转换器在满足采样时间和数据精度的前提下,尽量选取了市场供应量大,价格低廉,接口方便的a d574 ,这种a d转换器应用较多,资料收集方便。
According to the reserved scanning address sequence , channel range and trigger mode , it can sample data . the module can change sample time and sample length . the sample data can be disposed by the cpu on board and then be stored in 64k ram 本模块可根据预先设置的扫描地址序列、通道量程和触发方式进行数据采集,采样时钟和采样长度可以改变,测得数据经过板上cpu的实时处理后在64k的存储器中缓存。
The observed differences in the release patterns of different components and the differences between materials are important when preventive steps are to be taken , and it stresses the importance of applying a relevant sampling time and period in exposure assessments 上述不同微生物组成和不同材质间的释放型态的差异,在采取预防措施时是很重要的,也说明了要使用适当的采样时间和采样时段来进行暴露评估。
Meanwhile , caused by the stochastic disturbances and measurement errors , monitoring model based on single measurement value of individual sampling time tends to lack credibility and stability , and can ' t reflect the overall phase - specific operation state 同时,由于各种随机扰动的影响及测量误差的存在,针对单一采样时刻的过程测量值进行建模往往不能保证足够的可靠性与稳定性,无法实时反映过程时段整体运行情况。
In order to enhance the measure precision and expand the using area of the existing oil pipeline mfl ( magnetic flux leakage ) detecting system to natural gas pipeline testing , detailed information of flux obtained by decreasing sampling time and space interval is needed 为了提高现有输油管道漏磁检测系统的检测精度以及扩展系统的适用范围使其适用于天然气输送管道的检测,需要通过减小采样时间间隔和空间间隔的方法以获得更加完备的漏磁场信息。
Next , within a special period of sample times , the paper summarizes m & a ' s operation patterns of many domestic listed companies at the angle of practical research , sorts them into eight patterns . they are integrated m & a , share transfer upon consideration , management buy - out , share transfer given gratis , assets replacement , absorb and merge , invest to hold share and m & a on the second market . the paper also statisticses and analyzes the datas of many cases 随后,在一定的样本期间内,对国内上市公司的并购案例从实证研究的角度作了方式上的划分和总结,将并购方式归纳为整体并购、股权有偿转让、管理层收购、无偿划转并购、资产置换并购、吸收合并式并购、投资控股式并购和二级市场并购等八种方式,研究了大量案例,并对案例数据进行了统计分析。
The experiment ' s results show that the system is stable under the static pressure control and energy saving under the minimum total supply air volume control . although the terminal dampers ' s tuning time is prolonged under the minimum total supply air volume control , it can be reduced by adopting the appropriate sampling time when debugging the system . from all of this we can conclude thart the minimum total supply air volume control has a good application perspective 实验结果表明,定静压控制方式下系统较为稳定,最小总送风量控制比定静压更加节能,但它延长了末端阀位的调节时间,在系统调试时,我们可通过选择合适的采样时间来缩短阀门的调节过程,所以最小总送风量控制具有广阔的应用前景。
Chapter three provides synchronization algorithms in dvb - t cofdm receiver , including symbol timing recovery , carrier frequency error estimation and sampling timing recovery . chapter four introduces some channel estimation algorithms based on interpolation in dvb - t receiver . five estimators are compared , in terms of mean - squared error both in rayleigh channel and ricean channel 第三章首先讨论了由于载波频率偏差、符号定时偏差和采样定时偏差对ofdm系统所造成的影响和干扰,然后针对dvb - t系统的cofdm接收机方案,分别给出了符号定时同步、频率同步以及采样钟同步的实现算法,并对它们的性能进行了分析仿真。