有效操作

The features are simple structure and lightweight and protrusive working parts and dajustable support element.

实验结果表明：该机具有操作容易、使用和携带方便、转向灵活等特点，能有效降低劳动强度。

The Radiographer / Ultra-sonographer's role is to independently perform radiographic / ultrasonic examinations and produce images of diagnostic quality for radiological reports with due regard to patient welfare, clinical responsibility, radiation protection and effective use of technology.

放射影像技师/超声波检查技师的职责是独立操作并完成放射影像/超声波的检查并制作可用于相关诊断的影像图片，作为放射影像报告的参考。同时也要考虑和兼顾到病人的利益，相关临床职责，辐射保护和对技术的有效运用。

Photocopy of a valid Restricted Certificate of Competency in Radiotelephony of the radiotelephony operator on board.

船上无线电话操作人员的有效限用无线电话资格证书影印本。

In some other aspects, the cells operate using an adaptive reuse scheme that allows the cells to efficiently allocate and reallocate the system resources to reflect changes in the system.

在一些其它方面中，使用自适应复用方案而操作的小区允许小区有效地分配和重分配系统资源，以反映出系统中的变化。

Effective and risk-free operation of modern information systems relies heavily on security practices and overall information security management.

有效和无风险运作的现代信息系统依赖于安全的操作全面的信息安全管理。

Internet-based romote monitoring and fault diagnosing technology is an available approach to meet the requirements.

基于Internet 的设备远程监测、操作和故障诊断技术是解决这一问题的有效途径。

Test results showed that paving sand method can effectively eliminate the seed bounce. Paving high clean sand on the belt can provide favorable background for computer identifying seeds distribution. In addition, this equipment has advantage of no oil pollution, seeds recycling use and convenient operation.

经实际测试结果表明，铺砂能有效消除种子着落弹跳现象，高洁净度砂带可为计算机图像识别种子分布状况提供良好参照背景；该试验台还具有无油垢污染、种子可循环利用以及操作简便等特点。

In addition,two main factors influencing on torque measurement precision,shaft vibration and ambient temperature,are discussed and corresponding revolutions avoiding these influences are brought forward. Then two sets instrument,SEC Shaft HorsePower meter and WDC 1605A Current Ship Power Measurement System,are analyzed,emphasizing on basic principle,performance,installation and operation on-board.

同时，结合具体的测量仪器设备——日本SHOYO公司的"SEC船舶主机功率仪"和美国WDC无线数据传输公司的"1605A通用海上试验功率测试系统"，详细介绍应用扭矩仪实船测量柴油机的输出扭矩和有效功率，包括基本测量原理、设备的技术性能、应用注意事项以及实际安装与操作等内容。

366 This machine is simple in design,yet it is efficient in operation.

参考译文这机器结构简单，但操作有效。

The main jobs of this paper are as followed: 1 The reuse of the frame design technology for aircraft assembly fixtures is researched. a frame line part library is built with the templet driven technology, the reuse of the frame line part come true by the tools for instantiation and instance modification. The design resources are effectively used, some repeating work is cut. 2 Two methods to obtain the assembly feature are proposed: the straight way by the Enumeration method and the indirect way by project features to the assembly plane. All of the assembly features of the frame and the adjustable bearings are obtained by these two methods which makes the frame automatic assembly technology for aircraft assembly fixtures come true. 3 The frame automatic assembly technology aircraft assembly fixtures based on assembly features is researched. A binary tree assembly model is used to express the assembly information of the frame for aircraft assembly fixtures, the automatic assembly between the frame, the aircraft and the adjustable bearing is completed within the three steps: distribute, obtain and evaluate assembly feature. Finally, the efficiency of the frame assembly design is proved. 4The frame interpart modeling technology for aircraft assembly fixtures is researched, the intersection methods are concluded and the arithmetic of the single-cut, double-cut and inter-cut intersection is proposed, the interpart fast modeling of the frame design for aircraft assembly fixture come true. 5Based on the researches mentioned before, a sub-system of frame fast design for aircraft assembly fixture is developed on CATIA. The sub-system is used to design the aircraft assembly fixtures in a large aeronautics corporation and make a good- effect.

论文的主要工作如下： 1研究了飞机装配型架骨架设计重用技术，在总结归纳骨架线框结构类型的基础上，应用模板驱动的方法建立了骨架线框库，通过骨架线框零件的实例化和离线编辑实现骨架线框的重用，有效利用设计资源，减少重复劳动； 2提出穷举几何对象的装配特征直接获取方法，遍历零件模型的几何对象，从中捕捉所需装配特征，该方法简捷、高效；提出向装配面投影的装配特征间接获取方法，该方法在现有特征基础上生成装配特征，解决了部分装配特征难以直接获取的问题； 3研究了基于装配特征的飞机装配型架骨架自动装配技术，采用一种二叉树装配模型表达骨架的装配关系，并通过装配特征的分配、获取和赋值三个步骤，实现了骨架分别与飞机产品和可调支承的自动装配，避免了繁琐的人工交互操作，提高了骨架设计的效率和规范化程度； 4研究了飞机装配型架骨架零件间建模技术，在总结归纳骨架元件相贯处理方式的基础上，提出了骨架元件单剪切相贯、双剪切相贯和互剪切相贯的实现算法，简化了骨架相贯处理的过程； 5基于以上研究，在CATIA平台上开发了飞机装配型架骨架快速设计子系统，并应用于某大型航空企业的装配型架设计，提高了设计效率和设计质量。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。