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static nature
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  静止特性
     Large frame size can be used in these applications, due to the static nature of the channel conditions.
     在这些应用中,由于信道环境的静止特性,可以使用很大的帧长度.
短句来源
  “static nature”译为未确定词的双语例句
     N,N' tetramethylene 2,2' bipyridinium(DQ 2+ ) entrapped in the Nafion membranes is used as an electron relay. Luminescence quenching studies indicate that the quenching reaction of PtL 1L 2 2+ with DQ 2+ is both of dynamic and static nature.
     将带有正电荷的电子给体PtL1 L2 2 +吸附到膜中 ,电中性的受体PVS0 溶于水中 ,采用带有正电荷的N ,N’ 四亚甲基 2 ,2’ 联吡啶 (DQ2 +)作为电荷载体 ,并且也被吸附到膜内 .
短句来源
     The static nature of singlet and triplet exciton in polyacetylene and zero-field criterion
     聚乙炔激子单线态和三线态的稳态性质与零磁场判据
短句来源
     In the 1980s and 1990s, in the field of pragmatics------a new branch in linguistics,more and more scholars began to divert their attentions to the dynamic researches of utterances instead of stagnating in the static nature of remarks.
     二十世纪八九十年代以来,在语用学领域——语言学的一个新的分支,越来越多的学者和语言学家已开始把他们的目光由对话语的静态分析转移到语用学的动态发展。
短句来源
     Fixed networks take advantage of their static nature in two ways. First, they proactively distribute network topology information among the nodes, and each node pre-computes routes through that topology using relatively inexpensive algorithms.
     固定网络采用两种方式利用它的静态特性:第一,它主动地将网络拓扑信息分发给结点,根据这些拓扑信息,每个结点再使用相对简单的算法计算得到路由。
短句来源
     The traditional guard channel scheme (GC) and its numerous variants cannot adapt to changes in traffic pattern due to their static nature.
     传统的预留带宽策略(GC,guardchannel scheme)由于其固有的静态特征而不能适应流量模式的变化。
短句来源
  相似匹配句对
     Economicstructure seems to be both static and dynamic by nature.
     经济结构有静态和动态之分。
短句来源
     Back to nature;
     性命双修,先性后命;
短句来源
     Government and Nature
     “治”与“真”
短句来源
     The static nature of singlet and triplet exciton in polyacetylene and zero-field criterion
     聚乙炔激子单线态和三线态的稳态性质与零磁场判据
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  static nature
The static nature of the introduced logic family makes possible to apply the charge recycling technic to other more complex digital circuits and systems.
      
The strong red-edge effects, which are almost independent of the lipid composition demonstrate the immobility of the probe environment on the time scale of fluorescence emission and suggest the static nature of hydration effects.
      
The static nature of the map view favors applications related to inventory and description, and raises difficult questions of accuracy and interoperability.
      
The asymmetric nature of the benzoato ligand is further evidence of the static nature of such complexes.
      
Indocyanine green(ICG) angiography recently revealed intrachoroidal dye leakage and its static nature in CSC.
      
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Based on the theories on the distribution and flow of oil, gas and water through the micro-pores, the multi-function log interpretation program as a sort of interpretation system is designed to probe into the static nature of for-mations for the better appraisal of hydrocarbon resources on the one hand, and to unveil the dynamics of the production horizons for quantification of oil and gas reserves on the other. From application in 292 wells in 14 different oil fields, the system has proved to be capable...

Based on the theories on the distribution and flow of oil, gas and water through the micro-pores, the multi-function log interpretation program as a sort of interpretation system is designed to probe into the static nature of for-mations for the better appraisal of hydrocarbon resources on the one hand, and to unveil the dynamics of the production horizons for quantification of oil and gas reserves on the other. From application in 292 wells in 14 different oil fields, the system has proved to be capable of solving many geological problems such as: qu-antitative appraisal of pay zones; prediction of water production and produc-tivity of formations; quantitative description of flooding in open holes; de- termination of surplus oil saturation and its distribution in the pay zones,etc. It is expected that with the use of new logging technique, this system may be useful for other functions.

多功能测井解释程序是以油、气、水在微观孔隙中的分布与渗流理论为依据,在测井信息还原的基础上,研究发展而成的解释系统。它的提出与应用,不仅改善了以分析地层的静态特征为内容的油气评价概念,而且通过揭示产层的动态特性,相应发展了比较完整的油气层解释理论、分析逻辑和定量评价方法。经过16个油田(地区)325口井的现场应用,表明在油田勘探和开发的全过程中,这一解释系统能够提高解决地质问题的能力。主要功能为:定量评价油气层,预测地层的产水率与产能;定量描述裸眼井的水淹状况,确定产层的剩余油饱和度及其分布;而且能够定量计算二十多种地质参数,有利于开展油藏工程的研究。

The photoinduced electron transfer from the excited state of cyclometallated platinum(Ⅱ) complex PtL 1L 2 2+ (L 1=4 methoxyphenyl 6 phenyl 2,2' bibyridine,L 2=pyridine) incorporated into Nafion membranes to propylviologen sulfonate(PVS 0) in the surrounding solution has been examined by photochemical measurements.N,N' tetramethylene 2,2' bipyridinium(DQ 2+ ) entrapped in the Nafion membranes is used as an electron relay.Luminescence quenching studies indicate that the quenching reaction...

The photoinduced electron transfer from the excited state of cyclometallated platinum(Ⅱ) complex PtL 1L 2 2+ (L 1=4 methoxyphenyl 6 phenyl 2,2' bibyridine,L 2=pyridine) incorporated into Nafion membranes to propylviologen sulfonate(PVS 0) in the surrounding solution has been examined by photochemical measurements.N,N' tetramethylene 2,2' bipyridinium(DQ 2+ ) entrapped in the Nafion membranes is used as an electron relay.Luminescence quenching studies indicate that the quenching reaction of PtL 1L 2 2+ with DQ 2+ is both of dynamic and static nature.PtL 1L 2 3+ generated from the luminescence quenching remains in the Nafion matrix,while DQ +· migrates by an electron hopping mechanism to the Nafion water interface,where transfers an electron to PVS 0 to produce PVS -· .The negative charged PVS -· is repelled into the bulk solution by the anionic Nafion surface.The isolation of the photoinduced oxidized species PtL 1L 2 3+ in Nafion from the ultimate reduced species PVS -· in solution prevents them from undergoing back electron transfer,and a long lived(up to a few days) charge separation state is achieved.

研究了铂络合物PtL1 L2 2 +(L1 =4 甲氧基苯基 6 苯基 2 ,2’ 联吡啶 ,L2 =吡啶 )和磺酸丙基紫精 (PVS0 )在Nafion膜中进行的光致电子转移和电荷分离 .Nafion膜被水溶胀后形成类似反胶束的结构 ,其空腔表面带有负电荷 .将带有正电荷的电子给体PtL1 L2 2 +吸附到膜中 ,电中性的受体PVS0 溶于水中 ,采用带有正电荷的N ,N’ 四亚甲基 2 ,2’ 联吡啶 (DQ2 +)作为电荷载体 ,并且也被吸附到膜内 .激发PtL1 L2 2 +导致与DQ2 +发生电子转移 ,生成的DQ+· 迁移到Nafion膜 水溶液界面并将电子传给受体PVS0 ,生成的PVS+·被Nafion膜表面负电荷排斥从而阻止电荷回传 .电子转移产物PtL1 L2 3 +位于膜中 ,PVS+·位于溶液中 ,两者隔离 ,电荷分离状态的寿命可长达几天 .

A system level comparison between a conventional OFDM(orthogonal frequency division multiplexing) and the Multi-Symbol Encapsulated (MSE)-OFDM system is presented in this study. An analysis on impact of frequency offset on the system performance is presented. Comparisons are made on two different assumptions, i.e., either keeping the symbol size of the MSE-OFDM (i.e., number of the subcarriers) unchanged to increase the bandwidth efficiency, or keeping the bandwidth efficiency unchanged (ratio between CP(cyclic...

A system level comparison between a conventional OFDM(orthogonal frequency division multiplexing) and the Multi-Symbol Encapsulated (MSE)-OFDM system is presented in this study. An analysis on impact of frequency offset on the system performance is presented. Comparisons are made on two different assumptions, i.e., either keeping the symbol size of the MSE-OFDM (i.e., number of the subcarriers) unchanged to increase the bandwidth efficiency, or keeping the bandwidth efficiency unchanged (ratio between CP(cyclic prefix) and useful data transmission time) for system robustness to synchronization errors, i.e., frequency offset. In the first case for CP-reduced MSE-OFDM, bandwidth efficiency is improved due to a reduced number of CPs inserted between OFDM symbols. For the latter case of FFT size-reduced MSE-OFDM, robustness to synchronization errors is improved considerably due to the smaller number of subcarriers. The proposed system is of particular interest for fixed wireless systems and digital subscriber loops (DSL). Large frame size can be used in these applications, due to the static nature of the channel conditions. Implementation complexity of the MSE-OFDM system is also discussed.

本文对传统OFDM和多符号封装(MSE)-OFDM进行了系统比较.分析了频率偏移对系统性能的影响.比较在2种不同的假设下进行,即或者保持MSE-OFDM的符号长度(即子载波数)不收稿日期:2004-07-08作者简介:Y.WuFellow,IEEE,andX.WangMember,IEEEarewithCommunicationsResearchCentreCanada,CarlingAve.,Box11490,StationH,Ottawa,ONK2H8S2Canada.E-mail:yiyan.wu,xianbin.wang@crc.ca变以提高频带利用率,或者保持频带利用率(CP与数据有效传输时间之比)不变以改善系统对抗同步误差,即频率偏差的能力.在第一种降CP的MSE-OFDM情形下,由于减少了OFDM符号之间插入的CP数,频带利用率得以提高;对于后一种降FFT长度的MSE-OFDM情形,更少的子载波数显著改善了对同步误差的抵抗能力.本文提出的系统尤其适合于固定无线系统和数字用户环路(DSL).在这些应用中,由于信道环境的静止特性,可以使用很大的帧长度.文中还讨论了MSE-OFDM系统的复杂度.

 
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