有效质量

The average depth of erosion on gritstone for cavitation water jets is 2 times as much as common water jets, and its mass erosion is 7 times as much as common water jets, and its diameter of erosion is 2.3 times as much as common water jets.

对于含有空泡的磨料射流，围压增加空化噪音减少，泵压增加空化噪音增加；有效靶距直径比增加，对花岗岩的冲蚀深度与冲蚀质量存在一最优有效靶距直径比；在最佳冲蚀时间下，较纯水空化射流工作效率提高2倍。

How to measure harmonic effectively is necessary for improvement and optimization. The surveillance equipment for power quality, which can analyze the harmonics become more and more important in the low-voltage system.

如何准确有效的检测谐波是改善和优化电网电能质量的前提，带有谐波分析功能的电能质量监控装置在低压系统中呈现越来越重要的地位。

At present, in order to promote instruction evaluation and the healthy development of higher education, we must further our research and carry out evaluation ac- cording to levels and catergories, develop evaluation technology, build up evaluation data- base, lower the implicit cost of evaluation, carry out management counsultation in evaluation, cope with the conflicts triggered by the intrinsic defect of evaluation.

为此，必须准确把握高等教育质量的特点，加深对教育评估目标、评估方式和评估过程中的突出问题的认识，形成促进教育质量提高的有效机制。我国现行的高校本科教学工作水平评估已初显成效，当前应深入研究和解决分层分类开展评估、评估技术研发、建立评估数据库、降低评估隐性成本、在评估中开展管理咨询、妥善处理因评估本身固有的不足带来的矛盾等问题，切实推动教学评估和高等教育的健康发展。

Inertial force of motorcycle's crankshaft-connecting rod is the main origin of whole motorcycle's quiver.

长期以来生产企业缺乏有效的曲柄连杆机构惯性力实验检测设备和手段，在生产过程中难以对发动机惯性力有效的控制和调整，影响了发动机和整车的质量。

"The Tendering and Bidding Law of the People ' s Republic of China" lead the competition mechanism of bid invitation and tender into the investment financing and public purchase of our country. This mechanism has changed our country ' s traditional direct purchase and administration way, broken the place and department protectionism, offered an equally competition environment and effective legal guarantee for the bid invitation and tender, assured the quality of project, improved the economic benefit, advanced the technique and manage level, ensured the quality of construction、 shorten the time for a project and promoted the socialist market economy system setting –up and perfection.

《中华人民共和国招标投标法》把招标投标的竞争机制引入我国投融资和公共采购领域，改变了我国传统的直接采购和行政分配方式，打破了地方和部门保护主义，为企业的招标投标活动提供了平等的竞争环境和有效的法律保障，保证了项目质量提高了经济效益，促进了技术进步和管理水平的提高，保证了工程质量、缩短工期，促进了社会主义建设市场经济体制的建立和完善。

The conclusion of numerical simulation shows that nondestructive testing techniques based on vibration theory are effective to detect the quality of leakproof wall, and suitable for large-scale detection specially.

在此基础上的数值模拟结果表明基于振动理论的无损检测方法可以有效地确定防渗墙整体的质量状况，适合于防渗墙质量的大规模普查。

The promise must be clear and complete. The original copy of the letter of undertaking it must be provided, in which the effective stamp of the enterprise or the signature of the legal person must be attached.

对货物环保质量控制的承诺（对供货来源及供货方环保质量控制的承诺）：要求承诺内容明确完整，承诺书要提供原件应有供货企业有效印章或法人签字。

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。

It can advance economic healthy development, optimize economic structure, promote industrial modulability; provide suitable human beings for companies to assure its sustainability; improve people's living quality in body and mind.

劳动就业质量可以有效地推进我国经济的健康发展，优化经济结构，促进产业调整；为企业合理配置人才，保证企业可持续发展；提高人们的生活质量，不单是物质生活更重要的是身心健康发展。

LTD. Analysis of invalidation of the two MOOG valves was carried out with the help of advanced apparatus and profound expertise in this area at Fudan University. Our research reveals that poor quality of the valve surface is the root cause for invalidation. A detailed description of the method used in analyzing the invalidation of electro hydraulic servo valve is presented in this article. This research demonstrates that academic institutes can play a significant role to solve engineering problems by leveraging their existing resources.

我们利用复旦大学先进的表征仪器和工具以及积累的大量失效分析案例的丰富经验，对二个失效的MOOG阀的阀体进行解剖分析，判明了失效的真正起因不是液压油质量问题，而是阀滑表面质量存在问题，论文详细论述了我们采用的表征分析方法从宏观上、微观上对电液伺服阀阀的失效行为进行了全面分析的过程，是科研教学机构利用自身资源解决实际问题的一次有效的实践，具有较强的科学意义。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。