the lift-off phenomenon in through-hole wave soldering with sn-ag-cu-bi solder was investigated by the simulation experiment.

1、

the paper introduces the design of the control system of wave soldering machine and its controller.

本文介绍了波峰焊控制系统的总体设计和控制器的开发，并且在文中重点对基于继电反馈的PID控制参数自整定算法及纯滞后补偿控制算法进行了深入的研究。

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2、

this paper introduces technology of wave-soldering and the application in wave-soldering system based on plc.

本文介绍了波峰焊技术及其PLC在波峰焊接机系统中的应用。

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3、

establishment and analysis of wave soldering solder joints finite element model

波峰焊焊点有限元模型的建立与分析

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4、

there are two important characteristics in wave soldering with pb-free solders, the using high sn-content solder and the higher soldering temperature than the traditional sn-pb solder.

无铅钎料的波峰焊有2个重要特点，钎料中Sn含量很高以及钎焊温度明显高于传统的Sn-Pb钎料。

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5、

twin pontoon column stabilized semi-submersible drilling unit

双下浮垫柱稳半潜式钻井平台

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6、

further processing control compute model translate slab surface temperature into vidicon aperture data based on cast information. control image processing system size of vidicon aperture. image processing system adopt slab image in focus, brightness stabilization.

此外，模型还根据浇铸过程信息，将计算的板坯表面温度转化为摄像机光圈数据，用于控制图像处理系统中摄像机光圈大小，使得图像处理系统采集的板坯图像始终清晰、亮度稳定。

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7、

the aperture will be set to the aperture opening you have selected and you can confirm the areas that are focused.

光圈将被调整到你已选择的光圈大小。你可以核准对焦区域。

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8、

each number does not necessarily correspond to a specific size of the aperture opening, but is a relative number.

每组数字并非是光圈打开大小的特定值，只是一个程度的相关体现。

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9、

the influence of the following factors on showing of cracks by high speed photography, i. e. methods of illumination, illuminance, angles of camera, photographic speed, magnitude of iris diaphragm and speed of shutter, etc. was discussed.

讨论了照明方法、照度、摄影机角度、摄影速度、光圈大小和快门速度对高速摄影中裂纹显示的影响。

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10、

considering the effect of exposure time, aperture size and the depth of field to image collection synthetically, the holistic definition of image is computed to choice the best exposure combination.

综合考虑曝光时间、光圈大小、景深等对采集图像的影响，通过计算整体清晰度，选择最佳曝光值组合；

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11、

therefore, in order to automatically obtain moderate-brightness images, it is only needed that the aperture size, exposure time and signal gain are effectively controlled.

因此，为了能自动获得亮度适中、细节表现清晰的图像，只需要对光圈大小、曝光时间、信号增益这三个量进行有效控制便可以实现。

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12、

it is shown that this sort of temperature images will not change significantly with the aperture, shutter speed of the camera used.

新模型中从火焰图像转化而来的温度图像不因CCD摄像机镜头尺寸、光圈大小、快门速度等成像参数的改变而发生变化。

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13、

finally the lighting was finished and we just needed to adjust the tone mapping, the exposure and aperture of the camera to complete the image.

最后灯光设置结束后我们仅仅需要调节贴图色调，和摄影机曝光度和光圈大小来完成这张图片。

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14、

one of the unique features of drum scanners is the ability to control sample area and aperture size independently.

一个独特的功能的滚筒扫描仪是能够控制抽样地区和光圈大小独立。

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15、

research on thermal conductivity of zirconia-containing high alumina refractory fiber felt

含锆高铝耐火纤维毡的导热性能研究

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16、

it was found that the naoh-chitosan microsphere had similar structure with chitosan and lower crystallinity via sem, ir, and xrd characterizations.

经SEM.IR，XRD等表征，表明NaOH-壳聚糖微球具有与壳聚糖相似的结构和较低的结晶度。

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17、

the effect of absorbed dose irradiated in vacuum and air on the crystallinity of drawn hdpe was studied.

研究了在真空和空气中γ辐照对拉伸高密度聚乙烯（HDPE）结晶度的影响。

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18、

influence of n ( sio_2)/ n ( al_2o_3) on the crystallinity and alkylation performance of mcm-22 zeolite

n（SiO2）/n（Al2O3）对MCM-22分子筛的结晶度及烷基化性能的影响

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19、

effect of degree of crystallization on the cycle performance of spinel limn_2o_4

结晶度对尖晶石LiMn2O4循环性能的影响

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20、

annealing temperature and time remarkably affect the microstructure and the grain size of nd ( fe, mo) 12 phase.

晶化温度和时间显著影响Nd Fe12-xMox磁粉中Nd（Fe，Mo）12相的结晶度和晶粒大小。

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