查询词典 standard test

Based on current references about periclase expansion, it is considered that MgO con- tent limitation stipulated in the present national cement standard should be replaced by examining cement soundness with autoclave expansion test in order to guarantee quality of concrete engineering and to make full use of limestone resources.

所以直至今日仍有很多学者在为保证混凝土长期安定和合理使用资源两者之间探索新的路子。我国水泥标准在1977年修订时放宽了MgO规定，但它并不完全是建立在科学的，合理的基础上，其规定本身在实践中尚存在矛盾现象。

The spectral responsivity of test infrared detector is calibrated in two stages with two types of primary standard detector.

红外探测器的光谱响应率定标是在两套定标系统上利用两种参考探测器实现的。

Methods We test the cataract eyes pre-operatively apply with the scotopic blue and white flash(the intensity of which is 2.5logunit lower than that of the standard's)electroretinogram respectively,and analysis the relationship between the corrected visual acuity peripheral retinal(about 10 degree outside the macular fovea) condition 3 months post-operatively and the b wave amplitude of two kinds of F-ERG.

术前采用暗适应蓝、白光(比标准闪光衰减 2 。5 log单位的低强度光)视网膜电流图分别检查拟行白内障手术眼，将术后 3月最佳矫正视力、周边(黄斑中心凹 10°以外)视网膜状况与术前两种 F- ERG b波振幅分别作对比分析。

Made according to Standard JB/T7974-99,material Ht250,woking surface made by skiving,used to test the straightness and flatness of workpiece,Environmental temperature 20±5℃ when using.

按JB/T7977-99标准制造，材料HT250，工人面采用刮研工艺，是用来测量工件的直线度和平面度的量具，使用温度（20±5℃）。

Regarding the differences between the instrument and methods we take in inspection, please kindly sned me the test report of the sample, from which we may find out directly the difference compared with your standard.

考虑到我们的检测仪器和检测方法会有些差别，所以请把你检测的样品结果发给我。这样可以更直观的看出样品与你要求的指标存在的差别。

There is some variation even within standardized lighting conditions, due to factors including lamp characteristics, ambient temperatures,and the amount of electrical power available.once color viewing equipment has being installed,it is difficult to test how well it conforms with the standard, unless expensive equipment, such as a spectroradiometer,is used.

标准的照明条件会有一些变化。取决于像灯的特性，周围的温度，和一定数量可用的电能，一旦颜色观察设备已经安装，那就很难检测它有多符合标准，除非是使用很贵的设备，比如分光辐射度计。

BACKGROUND: Establishment of individual femoral model can describe the stereochemical structure of femoral accurately, which is conductive to measuring femoral anatomic forms. This model possesses unified standard, and removing the potential confounding factors, thus, it is more suitable for biomechanical test.

摘要背景：个体化股骨模型的建立，能够准确、完整地描述出股骨的立体结构，有助于测量股骨的解剖形态，这样的模型有统一的密度和机械性能，去除了个体之间性别、年龄、种族、骨质疏松程度、是否有骨病等混杂因素，用于生物力学测试更有意义。

Through simulation of the real process of thomcolumbar burst fracture and use of modem dynamics techniques, the present study was (1) to investigate the kinetic relationship between structural damage and impact energy absorption and dynamics mechanism of thoracolumbar burst fracture by quantitative analysis of various injured segments;(2) to explore the instability mechanism of L1 vertebral burst fracture and its injury threshold by three-dimensional analysis of the injured segment with stereophotogrammetry in combination of transient physical parameters, anatomy and image;(3) to explore the corresponding relationships between impact energy, geometry parameters and biomechanics by geometry and biomechanical analysis of thoracolumbar burst fracture, which may provide an objective standard for evaluation of spinal injury severity and experimental evidence for adoption of biomechanical treatment in clinic;(4) to evaluate the fixation effect of different instruments and the effect of intervertebral bone graft on segment fixation by analysis of the threedimensional stability of different internal fixation instruments and their decompression of the spinal canal, which may provide experimental evidence for therapeutical selection for thoracolumbar burst fracture in future; and finally to investigate the effect of various instrument fixation on dynamical characteristics by comparison and quantitative analysis of frequency and amplitude responses, which may provide certain theories and experimental evidence for application of vibration test to judge the stability of the spine.

本研究从胸腰段脊柱爆裂骨折发生的实际过程出发，以现代动力学检测及计算机多通道高性能数据采集分析系统等高新技术为基础，实时量化分析损伤节段的工程参数，揭示了结构破坏与能量吸收的变化规律，探讨了胸腰段脊柱爆裂骨折的瞬态损伤机制；利用三维立体摄像技术，对不同损伤程度的节段进行三维运动分析，结合瞬态物理参数、影像学和病理解剖，明确了〓椎体爆裂骨折的失稳机制及损伤阈值；通过对胸腰椎爆裂骨折的几何学变化及生物力学分析，明确了撞击能量与几何参数、几何参数与生物力学的相应关系，为评判脊柱损伤程度提供了客观标准，为治疗中采取适宜的生物力学方法提供了实验依据；通过对比分析不同内固定器械的三维稳定性和对椎管的减压作用，评价不同器械的复位固定作用，同时比较椎体间植骨对节段固定作用的影响，为今后临床胸腰段脊柱爆裂骨折的治疗选择提供依据；利用振动测试与分析技术，比较及量化分析了不同致伤状况的频幅响应特征，比较分析了各种器械固定对动力学特性的影响，为今后临床建立基于振动测试与分析技术判断脊柱稳定性的诊断方法，提供了一定的理论和实验依据。

By roundness image processing,the characteristic information of round parts can be got.Thus we can precisely and swifty test the roundness error and correlative geometry dimension and shape error of the parts.Through the comparison to the standard objects or design demands,we can estimate whether the part is qualified

对采集到的零件图片进行图像处理，得到零件的圆度特征信息，从而精确快速的检测出零件圆度误差和相关几何尺寸和形位公差，通过与标准件或设计要求的比较，判断出被测零件的圆度是否合格。

Sponge outgassing in vacuum at the ambient temperature and the temperature on teated according to spaceflight industry standard and test equipment is measured.

利用航天工业行业标准及测试设备对一定真空度条件下的聚胺脂网状泡沫在常温及加温两种不同工况时的出气情况进行测试；对两者的放气量进行比较；对放气机理进行分析探讨。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。