标准地

The modal tests of PCB and PCB assembly (free boundary condition and fixed boundary condition) were carried out. The equivalent elastic modulus and damping parameters of PCB can be gained, and the fixed boundary condition of finite element model was also determined. These will help to the following work. Second, drop impact tests of three different heights were carried out. Strains and acceleration responses of PCB were measured. Failed BGA packages of different test conditions were dyeing, and cross section analysis of failed solder joints was conducted. It was found in our drop tests that the root cause of lead-free solder joints under drop impact was the combined effect of mechanical shock and PCB bending vibration.

针对JEDEC标准试件的局限性，提出了设计便于统计学研究焊点可靠性的试验试件的构想，利用有限元模态分析方法确定并验证了用圆形PCB组件替代JEDEC标准试件的可行性；通过一系列模态试验和有限元模态分析，确定了圆形PCB组件的相关试验参数，这不仅为跌落碰撞下PCB组件有限元模拟确定了较为合理准确的有限元模型，而且为正确地评价跌落碰撞下PCB组件的可靠性问题奠定了基础。

NOTE 3 Calibration laboratories that maintain their own primary standard or representation of SI units based on fundamental physical constants can claim traceability to the SI system only after these standards have been compared, directly or indirectly, with other similar standards of a national metrology institute.

注3： 持有自己的基准或基於基本物理常量的 SI 单位表达式的校准实验室，只有在将这些标准直接或间接地与国家计量院的类似标准进行比对之后，方能宣称溯源到 SI 单位制。

Being better than high quality edible alcohol and produced by mordern scientific technologies, high pure alcohol, with specific properties of its smell, physical and chemical quality index, and content of fusel oil,aldehyde group and ester group, is widely used in liquor-making industry.

1高纯度酒精的定名高纯度酒精的名称已在我国酒精和酿酒行业流行，但我国现行的酒精标准中，尚没有高纯度酒精这个等级，酒精企业中，产品质量达到高纯度酒精标准的也为数不多，高纯度酒精的名称是自发地叫起来的。

The method includes identifying (101) a surface in the image, and for each point in the image, calculating (102) a first curvature measure, forming (103) a set of rings of points about each point, each ring being of equal geodesic distance from a center point for the ring, calculating (104), for each ring, a standard deviation of the first curvature measure, and selecting (105) those rings with a minimum standard deviation for the first curvature measure.

该方法包括在所述图像中识别(101)表面；为该表面中的每个点计算(102)第一曲率量；为该表面中的每个点形成(103)围绕每个点的一组点环，每个环具有到该环的中心点的相等的测地距；为每个环计算(104)第一曲率量的标准偏差；以及选择(105)那些具有第一曲率量的最小标准偏差的环。

On the base of Pearson correlation coefficient indicate that the connection between IBI and CQHEI is higher than IBI and ISC of Juoshuei river basin. To the section of the upper and middle reaches, we suggest choosing simple and convenient SIAM to be the standard for environment in the future. But due to the type of ecosystem has a tendency to estuary ecosystem at the lower reach of Juoshuei river basin, SIAM is more unsuitable for evaluating at the reach. The correlation between each index is not notable, so we suggest seeking other assessment method as comparative environmental standards.

由指标相关性讨论可知栖地品质与生物完整性相关性较高(r=0.649)，水质状态与生物完整性相关性则较低(r=0.267)，对於中上游河段部分，建议日后进行河川生态环境调查时可选择简便易用的SIAM模式做为标准；下游近海河段则因河川型态渐转变为河口生态系的型态，故适用於溪流生态系的SIAM在适用性上较差，各指标间相关性并不显著，建议可寻求其他评估模式做为环境品质的判断标准。

CCDI's portfolio shows a history of working for the progress of the public. Our projects have been recognized by both the public and the consultancy industry, most recently with the design of the "Watercube", the National Swimming Center and other six sport facilities for the Beijing 2008 Olympic Games. Incus the past, we have provided project management services for the Shanghai International Exhibition Center, using our experience to achieve an optimized control of time, cost and quality of the project. At present, our work in the Healthcare industry is helping to raise the quality of Chinese medical facilities to international standards and our Environment and Energy division has begun an ecological preservation effort at Dongli Lake in Tianjin….. At CCDI, we care about the environment we are living in and we are here to help resolve challenges presented in the progress of China urbanization.

CCDI为2008年北京奥运会主持设计了国家游泳中心"水立方"、网球中心、沙滩排球馆、射箭场、曲棍球场、小轮车场等六个场馆；意识到城市可持续发展的迫切性，我们正在推进天津东丽湖全生态城镇方案以及河南、安徽、山东等地区新能源项目的实施；在医疗领域，我们关注人们的医疗和健康，将国际标准应用于医院设计，引领国内医疗行业设施建设的发展方向；通过国际经验的运用，为上海国际会展中心提供全程项目管理服务，实现了时间、成本、质量的更优控制……在CCDI，我们珍爱我们生活的城市环境，为此我们将一如既往地担负起企业的社会责任，为中国城市建设提供高标准的专业服务。

In the case where your itemize deductions, including home mortgage interest and property taxes, do not exceed the standard deduction amount, it is better for you to take standard deduction.

在此情况下，你列举扣除额，包括住房抵押贷款利息和房产税，不超过标准扣除额，是更好地为你采取标准扣除。

This paper points out that laser beam quality's evaluating criterion is related to real application types.

详细地介绍了各种激光光束质量的评价标准，提出了光束质量的评价标准与实际的应用类型有关。

One side effect of the library's use of a namespace is that when we use a name from the library, we must say explicitly that we want to use the name from the std namespace.

标准库使用命名空间的副作用是，当我们使用标准库中的名字时，必须显式地表达出使用的是命名空间 std 下的名字。

A quadrilateral distortion metric was proposed, which considered both of element minimal angle and warpage. An mesh smoothing approach of combining Laplacian method and μGA for quadrilateral mesh was presented, which could improve the mesh quality significantly without effect the algorithm's performance.

提出一种综合考虑单元最小角和翘曲的四边形网格质量评价标准，以该标准为优化目标，提出了一种以面积为权值的Laplacian方法与小种群遗传算法相结合的网格光顺方法，在兼顾计算效率的同时，可有效地优化网格形态质量。

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。