| 1. | The method used for calibrating ac voltage calibrators will depend on the required accuracy and bandwidth of the unit under test
校正交流电压校正器的方法将视乎所需的准确度及接受测试元件的带宽而定。 |
| 2. | Ensure all validation and equipments are operated and maintained in a safe and secure manner and are calibrated to required accuracy
确保所有验证和设备的操作与维护在安全可靠的状态下进行及所有验证设备校准到所需精度。 |
| 3. | For many , the final product selection decision is often determined when a particular technology clearly demonstrates its ability to deliver long - term reliable level measurement with the required accuracy
对于许多人来说，当一个特定技术明确地证明其能按必要的精度提供长期可靠的物位测量时，常常才能下定决心，选定最终的产品。 |
| 4. | Based on the computational results for the initial grid division , the adaptive grid refinement is introduced until meeting the required accuracy . the computer program is established for implementing the aims described above
在对初始网格进行初步的流场计算的基础上，根据计算结果对网格进行自动加密，直到流场模拟结果达到规定的精度要求。 |
| 5. | To maintain the required accuracy , the implementation of the ssfm requires that the step size be selected carefully , which has been studied by many authors . however , the selective problem of the time window width , which has important effect on the numerical simulation , was rarely reported
时间窗口的选取毫无疑问对计算结果有很大的影响，然而目前针对t _ w的选取及其对数值模拟结果的影响这一方面的研究尚未见报道。 |
| 6. | The optical manufacturing for off - axis aspheric mirrors has become increasingly challenging for two reasons . the mirrors , in addition to being larger , are more aspheric and off - axis in order to meet the requirement of next generation space camera , which is commonly configured as three - mirror - anastigmat ( tma ) to get both wide fov and high resolution , and the required accuracy is more stringent
近年来，人们提出了“离轴三反消像散” ( tma )结构来满足下一代空间相机“详查”和“宽覆盖”的技术要求，该结构中要求使用三块离轴非球面反射镜，而大口径、高精度离轴非球面反射镜的制造技术是研制tma结构空间相机的主要技术瓶颈之一。 |
| 7. | Using the program two and three - dimensional numerical simulation of wind flow around single or multiple buildings can be achieved and the detailed flow condition including wind velocities , pressures and time - average characteristics of turbulence can be obtained . in order to attain the required accuracy efficiently multi - layer local refinements can be carried out based on the initial division grid
程序采用fortran语言编制，可实现二维和三维单体及群体建筑的绕流风场的模拟计算，获得建筑绕流风速、表面风压及湍流平均特性等数据；可通过对初始网格实施多层次的网格局部加密，以使风场解达到最终的精度要求。 |
