A magazine for electronic original equipment manufacturers and electronic manufacturing service providers in China who design, assemble and test surface mounted PCBs. 针对中国电子制造商的电子制造服务业,帮助他们开展表面贴装电路板的设计、组装和测试。
Care should be taken to ensure that the probe is held normal to the test surface and pressed positively on to the test surface. 应注意确认探头通常的手握方式以直接接触测试漆膜的表面。
The container was inverted on the test material surface for a period of 24 hours. 该瓶倒置于所测试的材料表面持续24小时。
Sunshine Refraction Test and Surface Temperature Measurement to Suspended Glass Insulator 悬式玻璃绝缘子阳光折射试验和表面温度的测量
Contact fatigue test of surface hardened gears 硬齿面齿轮的接触疲劳试验
Electrical characteristic test and surface modification in Contact mode of STM using I-Z curve 利用I-Z曲线的STM接触模式的电学测量和表面改性研究
Test of surface temperature in alloy steel billet continuous casting 合金钢方坯连铸铸坯表面温度测试研究
Identification of Cooling Characteristics on a Test Probe Surface by Inverse Heat Conduction Problem 利用IHCP对淬火测试探头表面冷却特性辨识的研究
At the same time, through the microscope test of surface, the effect on craze density by strain rate has been investigated as well. 同时通过表面银纹显微镜观察实验,研究了应变率对银纹密度的影响。
Besides, jet perforating simulation test, surface compounding test, field cement plug test of one well and field well-cementing tests of two wells are carried out. 此外,还进行了聚能射孔试验、地面打灰试验、1口井的现场打水泥塞试验和2口井的现场固井试验。
Drop Tower Test of Surface Tension Tank 表面张力贮箱落塔试验
In order to conveniently and quantitatively test the surface shape of large aperture optics, a digital knife-edge tester is integrated with a traditional knife-edge tester, CCD image processing and a computer aid calculation. 为便捷地定量检测大口径光学元件面形,运用数字刀口检测技术,把传统刀口仪与CCD图像采集处理、计算机辅助计算相结合,构成数字刀口仪。
When flow velocity reaches 2.62 m/ s, the local corrosion is pitting corrosion and the protective corrosion product film can not form on the test coupon surface at the temperature of 100 ℃ and the CO_2 pressure of 0.03 MPa. 在流体速度为2.62m/s的情况下,温度为100℃、CO2分压为0.03MPa时,发生的局部腐蚀主要为点蚀,试样表面未能形成保护性腐蚀产物膜;
Experiments comparing the measured value of ultrasonic thickness measurements and mechanical measurements on rough corroded materials without flattening the test surface were carried out. An average measurement error of from 0.6 mm to 2.2 mm was found in the ultrasonic measurements. 根据对未经平整的粗糙锈蚀表面分别进行超声波厚度测量和机械测量的比较试验,发现超声波测量的平均误差为0.6~2.2mm。
The system also test the surface defects of the aluminium sheet. 实验还对铝板的表面人工缺陷进行了检测和分析。
Model test of surface water intake of Jining Canal Power Plant 济宁运河发电厂地表水取水口物理模型试验研究
Twenty five test results are collated and calculated so as to get test regression surface of concrete, which is critical fracture surface of concrete or criterion of three dimensional mixed mode fracture for concrete. 对全部试验结果进行整理和分析后,用数理统计的多元回归法得到混凝土的三维断裂准则。
The new automatic system of distinguishing defects on test workpiece surface presented in this paper has wiped out all the influence of visible light given by ultraviolet exciting lamp, overcome the zero drift of the amplifier, and restrained the electromagnetic interference in the high gain amplifier. 本文提出的荧光磁粉探伤自动识别系统,消除了紫外激发光源中可见光的干扰,较好地克服了放大系统的温漂,抑制了高增益放大器中的电磁干扰。
Tensile test and surface layer effect of ultra fine grain thin copper sheet prepared by electrodeposition 电沉积法制备的超细晶薄铜板拉伸及表面层效应
In this paper, a novel electrochemical technique under thin water film, combined with dew test and surface roughness measurement, were utilized to study the atmospheric corrosion performance of cold-rolled mild steel plates. 采用薄层电化学测试技术,并结合结露试验和表面粗糙度测量研究了冷轧低碳钢板的耐大气腐蚀性能。
In the convective drying process, the infrared thermal technology was used to test the surface temperature of wet Vitamin E and Maitong soft gelatin-capsules. The thermograms of wet Vitamin E and Maitong soft gelatin-capsules were obtained. 应用红外热像技术,在对流干燥实验台上对热风干燥过程中软胶囊表面温度进行了测试,得到了湿维E软胶囊和脉通软胶囊的红外热图。
Novel Moisture Soaking Techniques Of Soldering Heat Test for Surface Mount LSIs 新的表面安装LSI耐焊接热试验加湿技术
Research on automatic test for surface hardness of metalwork 金属工件表面硬度自动测试研究
ET can test surface cracks by testing the change of impedance when the testing coil is near the tested object. 电涡流检测是利用探头线圈靠近被测物体时阻抗发生的变化来检测裂纹的。
The results indicated that the method could improve the ablative resistance of the composites. The linear ablative rate of the composites at the test surface and the maximum temperature of the backside of the composites were decreased by 7.2% and 20 ℃ respectively. 结果表明通过阳极氧化处理可以改善复合材料的耐烧蚀性能,其线烧蚀率降低了7.2%,背面最高温度降低了20℃。
Intelligent Optical Test of Surface's Status of the Highway and It's Information Processing 高速公路路面状况的光学智能检测与信息处理
The temperature of the liquid and test section surface and heat transfer coefficients, with and without acoustic cavitation, were measured and analyzed in order to study the effect of the parameters of acoustic cavitation on natural convective heat transfer. 实验中测量并研究有无声空化作用时液体温度、加热表面温度及传热系数的变化,旨在研究声空化参数对自然对流传热的影响。
Magnetic fluorescent-penetrant inspection is a NDT method that often used to test the surface cracks of ferromagnetic materials. It is widely used because of its high sensitivity, fast speed and its simple and dependable craft without the destruction of raw materials. 荧光磁粉探伤是检验铁磁性材料表面或近表面缺陷的一种常用手段,由于其在不破坏原材料的条件下,具有检测灵敏度高、速度快、检测工艺简单可靠等优点,从而得到广泛应用。