查询词典 channel width

The pulse width broadening of the femtosecond laser after angular dispersion wasdescribed,the pulse width expression at arbitrary propagation distance was provided,the pulse width broadening of the femtosecond laser by AOD was precisely predicted,thegeneral theory on pulse width broadening of plane wave,spherical wave and Gaussianbeam was deduced and the physical mechanism of pulse width broadening based on eachabove light beam model was revealed.

本文对随机扫描双光子显微镜中飞秒激光传输特性进行了系统深入的研究，完整解决了这一理论问题，发现了空间与时间色散通过角色散耦合的规律，为空间与时间色散同时补偿的方案提供了理论依据，基于此原理的单个角色散器件同时补偿空间和时间色散的方案高效解决了声光偏转器的色散补偿这一核心难题，为建立随机扫描双光子显微成像装置并应用于神经学研究奠定了基础：阐明了飞秒激光经角色散后的光斑展宽规律，获得任意传输距离处的光斑解析式，精确预测了声光偏转器对飞秒激光的光斑展宽，并揭示了光斑展宽的物理机制。

It was illuminated that the width of the centre bright fringe decreased along with the increasing width of the rectangular aperture when the effect of the aperture on the beam couldn't be ignored,however,the width of centre bright fringe step changed with increase of the size of the aperture when the effect could be ignorable,the width of the half maximum intensity of the centre bright fringe decreased along with the accretion of the width of the aperture and then it tends to a constant.

结果表明，当光阑对光束的衍射影响明显时，光束衍射场的中央亮条纹的宽度随着光阑边长的增大而减小；当光阑对光束的衍射影响极小时，中央亮条纹的宽度随着光阑边长的增加而阶跃变化，中央亮条纹强度的半最大值宽度随着光阑边长的增大而减小；当光阑对光束衍射影响极小时，中央亮条纹半最大值宽度趋近于一定值。

The canopy structure and leaf morphological characters of 4 sugarcane genotypes at different leaf layers on seedling were studied by using CI-100 plant canopy instrument and CI-203 area meter instrument. The results showed the leaf morphological parameters, canopy structure and radiation transmission at different leaf layers were notably different among different genotypes. The variation of Ila, Amfi, Dl at different leaf layers were mainly caused by the leaf width at relevant position. The variation of K at different leaf layers was related to Amfi and Dl. The variation of Td（transm. coef. for diffuse penetration）had significant correlations with Ila, Amfi and Dl. The variation of Tr（transm. coef. for radiation penetration）had significant correlations with Dl, leaf width and the ratio of leaf length to width. The variation of Par had significant correlations with Ila, leaf area, leaf width and the ratio of leaf length to width.

摘要利用CI-100数字植物冠层分析仪和CI-203叶面积分析仪测定了4个甘蔗品种不同叶位层的冠层参数和相应叶位叶片的形态特征，结果表明：不同基因型不同叶位层间叶片形态、冠层空间结构和冠层辐射特征存在显著差异，不同叶位层叶面积指数、叶簇倾角和叶分布的变化主要由冠层内不同叶位叶片叶宽的变化引起，而不同叶位层消光系数的变化主要与叶簇倾角和叶分布有关；散射光透过系数的变化主要与叶面积指数、叶簇倾角和叶分布有关，直射光透过系数的变化主要与叶分布、叶宽、长宽比有关，光合有效辐射的变化与叶面积指数、叶面积、叶宽、长宽比有关。

The fiber length has only little influence on the basic density within the growth rings, and significant correlation at 0.01 levels was found between the basic density and the fiber length among the different rings. Only slight negative correlation was found between the basic density and the fiber width within the growth rings, but significant positive correlation at 0.01 levels was indicated between the basic density and the fiber width among the growth rings, contrary to that of fiber length. It was demonstrated that significant positive correlations at 0.01 levels between the basic density and fiber double wall thickness, fiber length to width ratio and double wall thickness to diameter ratio, significant negative correlations at 0.01 levels between the basic density and fiber diameter and diameter to width ratio, only slight negative correlation between the basic density and fiber width both in the same growth rings and among the different growth rings. No significant correlation was found between the basic density and the vessel morphological features, nor was the tissue proportion in the same growth rings. But among the different rings, it was found there was significant positive correlation at 0.01 levels between the basic density and the fiber proportion among the different rings, and significant negative correlation at 0.01 levels between the basic density and vessel-elements proportion and ray proportion, only slight negative correlation between the basic density and the parenchym proportion. Significant or no significant negative correlation was found between the basic density and the microfibril angle in the same growth rings, but significant negative correlation was found between the basic density and the microfibril angle among the different growth rings.

生长轮内纤维长度对基本密度的影响不大，而在不同生长轮间纤维长度与基本密度达极显著正相关，纤维宽度与此相反，同一生长轮内纤维宽度与基本密度极显著负相关，不同生长轮间只有微弱负相关；基本密度与纤维双壁厚、长宽比、壁腔比在生长轮内和生长轮间均呈极显著正相关，而与胞腔直径、腔径比均呈极显著负相关，仅与纤维宽度呈微弱的负相关；导管形态对基本密度的影响不显著；同一生长轮内组织比量对基本密度的影响也不显著，但不同生长轮间基本密度与纤维比量呈极显著正相关，与导管比量和木射线比量呈极显著负相关，与轴向薄壁细胞比量仅呈不显著负相关；生长轮内基本密度与微纤丝角呈显著或不显著负相关，但在生长轮间这种负相关达到极显著水平。

With the decrease of gap width and box draft, the position of the resonant wave number increases. The band width of the resonant wave number depends on gap width closely. With the increase of gap width, the band width increase.

共振频率主要随着吃水深度的增大而减小；其次随着狭缝宽度的增大而减小；再者就是随着箱体宽度的增大而减小。

The method comprises A: separately configuring different common channel priority indication for different service data stream transmitted on same dedicated service channel; B: according to sequence from high to low of public channel priority indication for different data stream, priorly scheduling public channel high priority indication service data stream for transmitting at every moment; C: if service data stream of low common channel priority indication being not scheduled in a preset reference time period, then upgrading the service data stream common channel priority indication, then return to B.

分别为在同一专用业务信道上传输的不同业务数据流配置不同的公共信道优先级指示；B。在每一时刻，所述专用业务信道按照不同业务数据流的公共信道优先级指示由高至低的顺序，优先调度公共信道优先级指示高的业务数据流进行传输；并C。预设一参考时间段，若公共信道优先级指示低的业务数据流在所述参考时间段内总没有得到调度，则将该业务数据流的公共信道优先级指示升高，然后返回B。

The different points of views, transverse section, plane and volume changes are considered. The results show that the evolution of the Xinqiao Channel has experienced three stages: in 1861~1926 ,the Xinqiao Channel area had been eroded at first and then silted; the Xinqiao Channel is formed during 1926~1958 with the channel experiencing persistence erosion; from 1958 to 2002, the total volume of the Xinqiao Channel keeps stable with the volume of 5.02×108m^3. The pattern of 10m contour has shaped to a certainty in 1926 and 5m contour of the upper and lower parts of Biandansha has been joined. The change of sections of the Xinqiao Channel reflects its thalweg movement to the North Bank 1.1~2.8 km, its shape changes from "U" shape to "V" shape and its depth has been deepened.

计算结果显示在所研究的区域内自1861年以来新桥水道冲淤过程明显被分为三个阶段：1861~1926年的66a间新桥水道区域经过一段时间的冲刷后又重新产生淤积，总容积变化不大；1926~1958年的33a间新桥水道在不断的冲刷中总容积由2.603亿立方公尺增长到5.076亿立方公尺；1958年至今的45a时间里水道容积基本保持在平均5.02亿立方公尺。1926年新桥水道10m等深线已经形成一定的格局，1947年5m等深线向上延伸，扁担沙已经不再与崇明岛相连；1958年上下扁担沙的5m等深线基本连成一体，可以认为此时新桥水道已经形成。

In this dissertation, the characteristics of the OFDM wireless channel are modeled and simulated, the work as follow has been completed.(1) Based on studying the theory of the spread of wireless channel, the characteristics of wireless channel are analyzed, the models of a variety of fading channel are established, and the model of the wireless channel with tap delay line and Jakes channel model are designed.

本文主要是对OFDM系统无线信道特性进行建模与仿真，完成了以下工作：(1)在研究了无线信道传播理论基础上，分析了无线信道传播特性，建立了各种衰落信道的结构模型，设计了无线信道抽头延迟线模型和Jakes仿真模型。

The experiments cover two types of cement-lacking- channel models,one for circular channel s of different angular width,and the other for channel s with gradually decreasing void channel .

对固井质量评价中第Ⅰ界面胶结可能出现的不同角宽度的周向窜槽和渐变窜槽的声波测井响应进行了物理模拟，探讨了首波到达时间、首波幅度与发射接收探头之间的自由套管面积之间的关系。

Secondly, in the trapezoidal channel which profile is that the base width is 20cm, the depth of channel is 20cm, the slope coefficient 1.0, and U-shaped channel which profile is that the depth of channel is 40cm, the radius of bottom circular arc, the external dip angle α of abutment wall is 8°, the article does a series of experiment researches on many of cylinder measuring flumes, such as circular, pier shaped, elliptic and diamond cylinder flumes, and discusses the variance of discharge coefficient, submergence factor, backwater height, head loss and critical submergence degree for each of cylinder measuring flume. On this basis, the article optimizes the structure shape of the cylinder measuring flume further.

然后，在底宽为20cm、渠深为35cm、边坡系数为1.0的梯形断面渠道和渠深为40cm、底部圆弧半径为15cm、边墙外倾角α=8°的U形渠道上，对圆柱形、桥墩形、椭圆柱形和菱柱形等多种柱形量水槽进行一系列的试验研究，探讨各种形式柱形量水槽的流量系数、淹没系数、壅水高度、水头损失、临界淹没度等变化规律，在此基础上，对柱形量水槽的结构形式作进一步优化分析。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。