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optimal delay     
相关语句
  最优延迟
     System optimization is also considered; values of K are given which minimize the average total cost per unit time, and it is shown that the optimal delay period is either 0 (no delay) or infinite (no vacation), in case of Poisson arrivals.
     对于延迟时间有指数分布和是确定的情形分别求得系统的稳态分布的精确表示及某些性能指标.文章还讨论了系统优化问题,给出使得单位时间平均总成本最小的K值.证明在泊松到达的情形最优延迟时间是0(无延迟)或无穷(无休假)
短句来源
     A New Method to Choose Optimal Delay Time for Phase Space Reconstruction
     一种选取相空间重构最优延迟时间的算法
短句来源
     A new method to determine the optimal delay time for the maximum independence of coordinate of phase space is proposed on the basis of predictability of time series.
     利用时间序列的可预测性随预测步长变化的规律,提出了一种选取最优延迟时间的新方法;
短句来源
     A new method to recover packet losses using (2,1,m) convolutional codes is proposed. The erasure correcting decoding algorithm and the decoding determinant theorem are presented. It is also proved that the code with optimal distance profile has optimal delay characteristic.
     本文提出了一种基于(2,1,m)卷积码的网络丢包错误恢复新方法,给出了(2,1,m)系统卷积码的纠删解码算法和解码判定定理,并证明了最优列距离剖面码具有最优延迟特性。
短句来源
     After pointing out that the optimal design method of MSSNR TEQ cant be real-time implemented by DSP, we present a suboptimal MSSNR TEQ design method, which reduces the computational complexities greatly by using a new method to estimate the optimal delay D and a proposed step-by-step algorithm to compute the TEQ taps.
     提出了一种MSSNR TEQ的次优设计方法,它首先估计出目标抽样窗的最优延迟,然后用分步求解法求出TEQ的抽头系数。 和最优方法相比,次优方法的计算量大幅度减少,可实时实现,而其缩短信噪比的损失很小。
短句来源
  最佳延迟
     The optimal delay time was acquired through a test injection. Slice thickness 3.2mm, pitch 1 were used.
     SCTA扫描参数取准直宽度3.2mm,螺距(pitch)1,以小剂量试验获得最佳延迟扫描时间。
短句来源
     The output signal to noise ratio and the optimal delay time are obtained by very simple methods.
     同时以比较简洁的方法得到了输出信噪比和最佳延迟时间的解析表达式,使本算法理论趋于完善。
短句来源
     In the phase space reconstruction of chaotic time series, various methods for choice optimal delay time lag and embedding dimension are summarized. The methods of reconstruction expansion false nearest neighbors and minimum of prediction error are proposed to determine the two parameters at the same times. The applicability of the method is illustrated by Lorenz system.
     对混沌时间序列相空间重构中最佳延迟时间间隔和嵌入维数的选取方法作了综述 ,提出了同时考虑这 2个参数选取的重构展开虚假邻点法以及预测误差最小法 ,并以Lorenz系统为例作了验证
短句来源
     The optimal delay time was acquired through SmartPrep software. Slice thickness 3.0mm,pitch 1.5 were used.
     SCTA扫描参数取层厚3.0,螺距(pitch)1.5,用SmartPrep软件对比剂智能触发技术获得最佳延迟扫描时间。
短句来源
     The imaging quality of renal arteries CTA depended on the scanning skill tea certain extent, and a small test injection was necessary for optimal delay time before CTA.
     肾动脉CTA的成功在一定程度上取决于扫描技术,其中利用小剂量试验获得最佳延迟扫描时间十分必要。
  最佳延时
     A Scheme of the Optimal Delay Time of an Integrated Fuze for an Air Defence Missile
     防空导弹一体化引信的一种最佳延时方案
短句来源
     When laser operating parameters change, the optimal delay has larger variation relative to maximum amplification region (10 ns).
     当激光工作参数改变时,最佳延时相对于最大放大区(10ns)有较大的变化。
短句来源
     Experimental investigation of influence of CVL operating parameters on optimal delay of CVL oscillator-amplifier chain
     激光工作参数对铜蒸气激光器振荡—放大链最佳延时影响的实验研究
短句来源
     Influence of Ne pressure, input voltage, wall temperature and discharge tube atmosphere on optimal delay of the CVL oscillator- amplifier chain is studied.
     本文研究了氖气压、输入电压、管壁温度和放电管气氛对铜蒸气激光器振荡—放大链最佳延时的影响。
短句来源
  “optimal delay”译为未确定词的双语例句
     Conclusion: The optimal delay time should be varied with CM injection rates when the total volume given was unchanged (1.5ml/kg).
     结论:造影剂总量按1.5ml/kg计算时,延迟时间的选择应根据不同的速度而定。
短句来源
     Experiments show that influence of laser operating parameters on the yellow light optimal delay is larger than that of green light.
     结果表明,激光工作参数对黄光影响较大。
短句来源
     First, liver axial dynamic enhanced MRI with rapid or slow contrast administration were done to measure the time when the signal intensity of PV, HV and IVC reached the peak, in order to determine the optimal delay time for the second experiment.
     第一部分做了10例肝脏横断面动态增强MRI,分为两组,分别用快速和慢速法注射造影剂,测定PV、HV和IVC达信号峰值的不同时间,以决定第二部分实验的延迟时间。
短句来源
     The optimal delay times have been obtained from the first infinitesimal value of mutual information. The K2 information entropy and D2 correlation dimension of fluctuating signals have been extracted. It is shown that the K2 information entropy and D2 correlation dimension are sensitive to flow patterns variations of oil/water two phase flow and they are sensitive ‘indicators’ of flow patterns variations.
     3、提取了油水两相流电导波动信号的关联维D2和信息熵K2,得出的信息熵K2、关联维D2对油水两相流流型变化比较敏感,具有流型变化敏感“指示器”的特性。
短句来源
     Methods Sixty-one patients without pancreatic disease were choosed at randomly in the two approaches study: Firstly,21 patients underwent single-level enhanced serial CT scanning of the pancreas. By means of injection dosage of 120 ml contrast at 5 ml/s rate,CT value of the peripancreatic aorta and portal vein,pancreatic and hepatic parenchyma was measured respectively in order to determine the optimal delay time of multi-phase scanning (including arterial phase,pancreatic phase,and liver phase).
     方法 随机选择 6 1例无胰腺疾病患者 ,分为 2个步骤研究 :(1) 2 1例行胰腺同层动态增强扫描 ,对比剂总量为12 0ml,注射流率为 5ml/s,分别测定胰周主动脉、胰周门静脉、胰腺实质及肝脏实质在增强后不同时间点的CT值 ,确立最佳的多期 (动脉期、胰腺期及肝脏期 )增强扫描延迟时间。
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  optimal delay
This paper presents a framework for designing and evaluating long, buffered interconnect wires in FPGAs with near-optimal delay performance using HSPICE-derived delays.
      
Calculation of the optimal delay in nonsimultaneous firing of borehole charges
      
It is shown that the proposed method for the design of optimal delay equalizers results in all classes of equalizers with real and complex poles and approximates the prescribed group delay more accurately.
      
Thirty μs was determined as the optimal delay in the pump-probe pair.
      
Basic characteristics of the optimal delay and capacity assignment, a useful algoritm for the calculation of (γC)+ and simple upper and lower bounds on (γC)+, are derived for store-and-forward tree networks.
      
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Influence of Ne pressure, input voltage, wall temperature and discharge tube atmosphere on optimal delay of the CVL oscillator- amplifier chain is studied. Experiments show that influence of laser operating parameters on the yellow light optimal delay is larger than that of green light. When laser operating parameters change, the optimal delay has larger variation relative to maximum amplification region (10 ns).

本文研究了氖气压、输入电压、管壁温度和放电管气氛对铜蒸气激光器振荡—放大链最佳延时的影响。结果表明,激光工作参数对黄光影响较大。当激光工作参数改变时,最佳延时相对于最大放大区(10ns)有较大的变化。

Objective: Using time density curves analysis for better understanding the effects of alterations in contrast material (CM) injection rate on aorta and liver enhancement, to choose the optimal CM injection rate and delay time in the two phase hepatic helical CT scans.Materials and Methods: Twenty eight patients were randomizely divided into four groups and each group patient received the same amount CM at different injection rate (2ml/s, 3ml/s, 4ml/s and 5ml/s respectively). Scans were performed at the level...

Objective: Using time density curves analysis for better understanding the effects of alterations in contrast material (CM) injection rate on aorta and liver enhancement, to choose the optimal CM injection rate and delay time in the two phase hepatic helical CT scans.Materials and Methods: Twenty eight patients were randomizely divided into four groups and each group patient received the same amount CM at different injection rate (2ml/s, 3ml/s, 4ml/s and 5ml/s respectively). Scans were performed at the level of the first liver hilus and started 15s following the administration of CM then repeated every 15s for 3min. Aorta and liver enhancement were quantitated on the basis of CT attenuation value of pre and post contrast material. Time density curves were constructed and analyzed statistically.Results: Aortic and hepatic enhancement were different in altering injection rates when the volume of CM was given at 1.5ml/kg. The group of 4ml/s had greater enhancement but no significant difference statistically with the group of 3ml/s, significant difference with the other two groups. It was also found that the mean time reaching to peak aorta and liver enhancement was different at variable rates. It was 32.14s, 66.42s respectively for 3ml/s and 30s, 60s respectively for 4ml/s. Conclusion: The optimal delay time should be varied with CM injection rates when the total volume given was unchanged (1.5ml/kg). 3~4ml/s of injection rate were suitable for dual phase hepatic scans, and its delay time for aterial phase and portal venous scans should be 30 s and 50~60 s respectively. In addition, it should be considered individually depending on the patients condition and scan protocol.

目的:应用时间-密度曲线分析比较不同的造影剂注射速度对主动脉和肝脏强化程度的影响,以选择适合动脉期和门脉期双期扫描的注射速度和最佳的延迟时间。材料与方法:选取28例正常人随机分为4组,以不同速度(2ml/秒,3ml/秒,4ml/秒及5ml/秒)从周围静脉内注入造影剂后15秒开始扫描,以后每隔15秒在同一层面扫描1次,共3分钟。测量主动脉和肝实质不同时间增强后的CT值,分析时间-密度曲线,并对4组结果做统计学处理。结果:造影剂总量均按1.5ml/kg体重给予时,不同注射速度主动脉和肝实质的强化程度不同,以4ml/秒组最优,但统计学处理和3ml/秒组无差异,而与其他两种速度之间有差异。不同注射速度时主动脉和肝实质到达强化峰值的时间也各不相同,3ml/秒组分别为32.14秒、66.42秒而4ml/秒组分别为30秒、60秒。结论:造影剂总量按1.5ml/kg计算时,延迟时间的选择应根据不同的速度而定。适合双期扫描的速度为3~4ml/秒,而动脉期延迟时间宜用30秒,门脉期为50~60秒,但还应考虑到患者的情况和扫描方式

Optimal blasting parameters is derived through modelling tests in laboratary based on similarity law and Livingston blasting crater theory.Based on these parameters,some modelling tests on blasting with five different delay times have been carried out which shows that the optimal delay for breakage is 40~70ms.The result has a good agreement with practice.

根据相似原理和LivingstonCW爆破漏斗理论进行实验室模拟试验得出最佳爆破参数,以此参数为条件进行5种不同延迟间隔时间的模型试验,求得破碎效果最佳的微差间隔时间为40~70ms,并为现场工业试验所验证。

 
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