长度

The first disadvantage of MMI device is wavelength sensitive, which leads to restricted applications. To reduce the wavelength insensitivity in optical network applications, the demand of light source with a specific wavelength is needed, especially for power splitters. For this reason, a wideband criterion for MMI splitter is proposed. The basic principle is based on reducing the interference length difference and making it shorter than the spot size for constructive mode interference. Simulation results show the spectra of proposed MMI splitter is wide enough (1.26-1.61um) to cover the fiber communication band and the size of the splitter is more compact than that of the conventional MMI or Y-branch splitter.

多模干涉元件的第一个缺点为波长敏感，此缺点会限制其在实际上的用途；因元件在网路上的应用时，通常都需要降低波长敏感性，以减低对光源波长准确性的要求；有鉴於此，本论文提出多模干涉分光器的宽频标准；基本原理是建立在缩短其多模干涉区的长度差，并使之小於建设性干涉的光点大小；透过模拟后发现，操作频宽可涵盖光纤通信全波段(1.26-1.61um)，且长度小於Y形分支结构的分光器。

And the effects of length of data N to the approximate entropy of chaotic system isalso analyzed.All these are accomplished by examining several time series produced by a surperposition of white noise and noise-free data.It uses the discrete system logistic map and continuous system Lorenz attractoras the examples.

以Logistic方程描述的离散系统和Lorenz方程描述的连续系统为例，采用白噪声和无噪声信号以不同的信噪比混迭而成数据的方法，分析了相同数据长度N，不同信噪比下，混沌系统近似熵的变化；相同信噪比，不同数据长度对系统近似熵的影响。

To get the steady interface, the ratio of coextrusion flow length to height is at least l-1.5._The role of smooth flow zone is important to reduce the pressure-fall. The higher surface quality of the fluid path can make the velocity field more uniform and the interfacial offset less. However, the layer interface position was almost unaffected by the convergence angle, so for the convenience of die manufacture and extruder\'s collocation, it is fit to make the contact angle as 90°with smooth corner.

在模具结构参数中，共挤出流道的长度和模具壁面光滑程度对界面有重要的影响，根据计算结果得到了方形流道共挤出段长度与高度比的取值范围；而模具入口收敛角对界面的影响不大，在实际生产中为了模具制造和共挤出机布置的方便，可采用圆滑过渡的90°入口角。

The choice for material of iron core, all the structure design and the method of collimation for the magnet were also described. Simulation results of Opera show that when the length of the core is 220 mm, the effective magnetic length is about 302 mm and the maximal magnetic density is around 0.215 T at four interior angles. Corresponding field uniformity is within 0.8% in the area of 133 mm×200 mm.

根据磁铁的设计指标，给出了磁铁设计要求铁芯材料选择方法、整体的结构设计以及如何对磁铁进行定位和准直，并采用Opera程序进行模拟计算，结果表明：当铁芯长度为220 mm时，磁有效长度大约为302 mm；磁感应密度最大的地方在4个内角上，约为0.215 T；在133 mm×200 mm的平面范围内，磁场均匀性优于±0.8%。

With the basal stem of short spike L.brevitaba and its coterminous stolon, clonal ramet taken from grasslands which were non-degraded, light-degraded, moderate-degraded and heavy-degraded as the materials, the differences of stolon number and its length and the dry weight per unit of length of short spike L.brevitaba stolon from different degraded grassland were studied.

方法］以未退化、轻度退化、中度退化、重度退化草地上挖取的短穗兔耳草基茎及与其相连的匍匐茎和无性系分株为材料，研究不同退化草地上短穗兔耳草匍匐茎的数量、长度和单位长度匍匐茎干重的差异。

The radio of the length and the weight between in cotyledon and in the whole is corresponding to the degree of stress, which is in favor of root system getting into the deeper to alleviate the stress.

根的长度和干重在总长度和总干重的比例一般与胁迫程度呈正相关关系，以利于其根系深入到盐胁迫程度较低的土壤深层。

You need to know what the cross product is and what it means geometrically (a vector perpendicular to the vectors with a length equal to the sine of the angle between them).

你需要知道向量积是什么，以及它的几何意义(一个和两个向量都垂直的向量，长度等于原来两向量的长度乘以两向量的夹角的正弦)。

The following information is typically needed for each SKU: Item length, width, height, and weight Active picking location for the item Case quantity and dimensions (length, width, height, and weight) for items stored by the case Pallet quantity (or cases/tier and tiers/pallet) for items stored by the pallet Vendor if items are to be stored in vendor groupings Family group if items are to be stored by product groupings Special storage conditions, if applicable (flammable, refrigeration, etc.) Maximum stacking height or crushability factor, if applicable Items that are often sold together, if applicable.

下列信息通常需要为每个sku：项目长度，宽度，高度，体重活跃采摘地点为案例项目数量和尺寸(长度，宽度，高度，和重量)项所储存的案例托盘数量(或个案/层与层/pallet)用于存放物品的托盘如果卖方的项目将被储存在卖主集团77家，如果项目要储存产品gr oupings特别贮存条件下，如果适用最大堆叠高度或crushability因素，如果适用项目，常常一起出售，如果适用。

It is found unexpectedly that for any composition of theEOBT segmented copolymers, when ζ=0.22, the hard segments can start to crystallizeand the crystallizability of the hard segments increases with ζ. Although the definite valuehas no universal significance for all kind of segmented copolymers.

考虑到硬链段受限的程度与软硬链段的长度都相关，用硬链段和软链段的长度比ζ=〓来表征硬链段在这种受限条件下的结晶能力，则发现对于任何分子量的EOBT多嵌段共聚物，只要ζ＞0.22，硬链段就能结晶，此后，硬链段的结晶能力随ζ的增大而增加。

Because I only make rods of one length from each culm, I cut each culm to length before splitting.

因为我只会使棒的一个长度从每个秆，我将每个秆长度之前分裂。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。