在尺寸上

Tooth Proportions.—There are 17 pitches: 2.5/5, 3/6, 4/8, 5/10, 6/12, 8/16, 10/20, 12/24, 16/32, 20/40, 24/48, 32/64, 40/80, 48/96, 64/128, 80/160, and 128/256. The numerator in this fractional designation is known as the diametral pitch and controls the pitch diameter; the denominator, which is always double the numerator, is known as the stub pitch and controls the tooth depth. For convenience in calculation, only the numerator is used in the formulas given and is designated as P. Diametral pitch, as in gears, means the number of teeth per inch of pitch diameter.

齿比——一共有17种齿比：2.5/5，3/6，4/8，5/10，6/12，8/16，10/20，12/24，16/32，20/40，24/48，32/64，40/80，48/96，64/128，80/160和128/256在这一系列的分数中的分子是径节，径节的大小决定了节圆的直径；而分数中的分母通常是分子的两倍，分母是残余径节，它的作用是控制齿槽的深度为了方便计算，在所有的公式中都使用分子作为计算参数，并且与齿轮的表示方式一样定义为径节P尺寸，也就是在节圆上，每英寸长度上的齿数

After certifying the irreality of ideal filtering function, we can get a better filter selecting a proper window function. Comparing two actual filters, we designate a good"Panama hat"filtering function. Meanwhile, an effectively linear interpolating function is introduced to raise the image reconstruction quality. Describing its realizing steps on the micro-computer briefly, we reconstructed some images from the anlogue projections of some models. The number of projection views is 180, 100 same interval parallel lines per view; the size of reconstructed images is 64×64 pixels with 64 gray levels; the reconstructing speeds are 40" on PC-386 and 12"on PC-486, respectively; each pixel is 0.31mm.

在证明了理想滤波器的不可实现性之后，得知通过选择适当的窗函数可获得很好的滤波函数，经过两个实际滤波器的效果对比，我们选取了较好的"巴拿马帽"形滤波函数，同时也介绍了一个有效的提高重建质量的线性内插函数，概要地叙述了平行射束图象重建的计算机具体实现步骤后，对几个物体的模拟投影数据进行了重建：投影角为180°，每视角下有100个平行投影数据点，在386微机上重建尺寸为64×64，时间约为40秒；在486/33MHz微机上只用了12秒，图象的象点精度是0.31mm。

If as a result of body shell keycap stuck with the key causes of the "key card" failure, may be key in the cap and put a gasket between the pads can be used稍硬some plastic (such as floppy disk jacket abandoned) made, its size is equal to or slightly larger than the key body size, and location by the rod through the ammonium can open a free passage under the square hole, in accordance with its set of poles, the plug cap; use this pad chip cap with the key body to prevent stuck, you can repair button; If as a result of spring fatigue, shrapnel resistance causes large card key failure, then the Special button to open the body, a little stretching to restore flexibility to reset the spring; Remove the key precursor to the resumption of shrapnel.

若是由于键帽与键体外壳卡住的原因造成"卡键"故障，则可在键帽与键体之间放一个垫片，该垫片可用稍硬一些的塑料做成，其大小等于或略大于键体尺寸，并且在按杆通过的位置开一个可使铵杆自由通过的方孔，将其套在按杆上后，插上键帽；用此垫片阻止键帽与键体卡住，即可修复故障按键；若是由于弹簧疲劳，弹片阻力变大的原因造成卡键故障，这时可特键体打开，稍微拉伸复位弹簧使其恢复弹性；取下弹片将键体恢复。

The stealth warplane for the microwave radar usually have complicated structures with the coating of wave absorption. On the base of calculation and modeling of the geometrical structure of the warplane in real size, the HF RCS of the air crafts under two different polarizations in different direction have been calculated with the FDTD. The result shows that the above mentioned stealth warplane have the obvious characterstics of frequency resonance, polarization and the relatively large RCS in HF Band 10-30dBm2, which can be used as the theoretical reference for selection of working frequency for sky wave OTH Radar and it also means that the sky wave OTH radar has good capability of anti-stealth targets quantitatively.

对微波雷达具有隐身作用的飞机，其形体较为复杂且表面涂敷有强吸波材料在对一种具有隐身几何外形结构实际尺寸飞机进行计算建模的基础上，文中采用FDTD技术得到了两种极化状态下该飞机无涂敷时不同方向上的短波雷达截面RCS值其结果显示了这种隐身几何外形飞机在短波波段有明显的频率谐振特性、极化特性和较大的RCS10-30dBm2，可为天波超视距雷达在选择工作频率时提供理论参考，并定量地说明天波超视距雷达具有较优的反隐身目标能力

It has the same style with LTHS100E, however, its functions were improved based on the old style; at present, LTHS100B applies imported wind pump assembly which has twice theme ---absorb and blow (increase parts on positive pressure air, strengthen the pressure that can deliver the unmelted flux directly into little hopper); the height of material absorbing and delivering can reach as high as 5 meters, and its level distance is around 12 meters, and the capacity of flux depends is 80KG; the suspended function also can be tailored according to customers' requirements; the weight of 100B is 130KG, its outer dimension is 450*800*1100mm. It has the advantages of small-volume, light-weight, beautiful-outer-appearance, unnecessary of air-compression, and can be ground-mounted or suspended; it is also easy to be operated, with switching on button, it can be operated. Furthermore, it is controlled by infrared ray. It has alarming lights.

该机与LTHS100E机形相同，但其主要特点：在LTHS100E的基础上精心整改了其功能，现LTHS100B是采用进口风泵总成为基础，吸、吹二次全部为主题（在正压气上增加了部件，增强了压力把吸收回来没有融化的焊剂直接推送到前方机头的小料斗内，）焊剂的吸、送料其高度不得超过5米，水平距离在12米左右，焊剂容量为80KG，可悬挂也可根据用户需要为用户量身订制，自重为120KG，外型尺寸为：450*800*1100mm，本机具有体积小，重量轻，外型美观，不需要具备压缩空气，可落地、可悬挂灵活，其操作简便为一线通即可，红外线控制，上方有警示灯显示，当焊剂不足时就会报警。

The method includes the following steps: depositing a non-magnetic layer (3) of sufficient thickness; anisotropically etching the non-magnetic layer to form a steep wall of suitable dimensions at the required position of a flux guide; depositing a magnetic material to form a magnetic layer (9) on the wall in such a manner that the magnetic layer has a thickness corresponding to the required track width; removing undesired deposits of magnetic material but maintaining the magnetic layer on the wall; depositing an insulating material (19a) to cover the magnetic layer.

该方法包括下列步骤：淀积足够厚度的一个非磁层(3)；非均质地蚀刻该非磁层以便在磁通引导的要求位置形成适宜尺寸的阶跃内壁；淀积一个磁性材料，以便在该内壁上形成一个磁层(9)，使得该磁层具有对应于该要求的磁迹宽度的一个厚度；去除不希望的淀积的磁性材料而保持在该内壁上的磁层；淀积一个绝缘材料(19a)以便覆盖该磁层。

The remaining three species are much more difficult, at least from herbarium material, as staminate flowers seem to offer no useful characters; leaves on flowering specimens are often young, and therefore, generally small, and in all three species the leaf shape and size is variable, with character states overlapping between the species.

Flacourtia mollis的年轻的果可以被它的叶毛被认出，剩下的3 种更难分，至少从标本馆的标本上看如此，因为雄花好像没有提供有用的特征；在花标本上的叶经常幼嫩，因此，通常小，在全部3 种中叶的形状和尺寸是易变的，在物种之间具有重叠特征状态。

For thin polycrystalline films, especially those with columnar structure, once the diameter of grains on the film surface is larger than the film thickness, the total area of above and under basal planes (film-substrate interface) will be larger than that of side plane. And if the film precipitates on the substrate with thermal expansion coefficient different from that of the film, great thermal stress will be introduced during annealing.

对于薄膜特别是柱状晶薄膜，当晶粒在膜平面内的尺寸大于膜厚时，柱状晶粒的上底面和下底面的面积将大于侧面的面积，如果薄膜还附着在与其热胀系数不同的基体上并在不同于沉积温度的条件下退火时，膜中将存在较大的热应力。

Special localized cutting communication with the customer; 2.5 If not available notched hole diameter less than 60 mm hole, can be used to be relatively enlarger for the opening; After opening 2.6 backplane approach, starting with the opening negative, positive exposed bit sharp, nated from the positive control (both sides maintain collapse teeth); 3 connected corner of the corner of the 3.1 connection method, identify three Kok code on the middle and lower (50 mm poured from top to bottom. Another try a) 3:00 even in the corner of the counter and cross wooden cabinet on the sideboard; 3.2 corner of the Outer Limits with a shutter-ping; 3.3 In accordance with the drawings corner of the size, will have a fixed angle of the black reinforce the lower corner with 3:00 counters even

特殊局部地方的切割必须与客户沟通； 2.5如割口不大可用圆孔、直径小于60mm孔，可用相对应的扩孔器进行开孔； 2.6后背板开孔方法，先从反面开孔，正面露出钻头尖时，再从正面往里操作； 3 转角条的连接 3.1转角条的连接方法是，找出三个角码，上中下（上下50毫米往里，另居中一个）三点连在与转角柜交叉柜体的侧板上； 3.2转角条的外沿与门板一平； 3.3按照图纸转角条尺寸，将已固定的转角条用黑钉上中下三点与转角柜连

Its rule of change was obtained. On the basis of other studies, the flocculation kinetics and flocs structure was studied. By making some assumptions, collision frequency were presented. Then the the flocculation kinetics model was established through population balance equation. Comparison of experimental data and modeling results indicate that there are the same trend between the two. So the model can predict flocs number and size during flocculation of Yellow River's loess particles without using empirical parameters. The TEM and SEM were used to obsever flocs in the study of floc structure. The flocculation was divided as flocculi, floc and floc aggregate. The flocs structure model was established by assumption that particles position in floc accords with tetrahedron. The fractal dimension of model and experimental flocs was found to be coincident. So the model can reflect the structure of flocs formed in flocculation of Yellow River's loess particles by macromolecule flocculant at a certain extent.

最后，本文还对絮凝动力学和絮体结构进行了研究，在前人研究的基础上，针对高分子絮凝黄河泥沙，对絮凝过程作了一些符合试验条件的假设，建立了颗粒碰撞频率表达式，应用了颗粒数量平衡方程，从而建立了絮凝过程的动力学生长模型，模型计算结果与试验数据对比表明，二者趋势一致，在没有使用经验参数的情况下基本上能够描述黄河泥沙絮凝过程中絮体数量和尺寸分布的变化过程；对絮体结构的研究中，应用扫描电子显微镜和透射电子显微镜对絮体进行了观察，将絮体分为絮粒、絮团和絮网三个不同的生长阶段，通过假设颗粒结合位置符合正四面体，建立了絮体结构模型，计算得到的模型絮体分形维数基本与试验中的实际絮体相符，在一定程度上能眵反映高分子絮凝黄河泥沙生成的絮体结构。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。