1) valid value table
有效值表
1.
It uses valid value tables(VVT) to connect each geographic feature with its codes information.
在地理信息数据库(Geodata-base)数据模型中,以国家标准地理信息分类代码体系为基础,在数据字典表中存储地理要素实体的分类与特征属性,利用有效值表将地理要素与其本身的代码信息联系起来。
2) effective value measuring instrument
有效值测量电表
3) effective value voltmeter
有效值电压表
4) apparent effective energy
表观有效能值
1.
It was concluded that:apparent effective energy measured by three methods had significant difference (P<0.
采用全收粪法、指示剂法、回肠末端食糜法测定14种不同来源小麦混合日粮的表观代谢能值(AME)和氮校正表观代谢能值(AMEn),同时用回肠末端食糜法测定回肠表观消化能(IDE)和回肠氮校正表观消化能(IDEn),然后比较3种方法所得表观有效能值之间的差别,结果表明:3种生物学方法所得的小麦混合日粮的表观有效能值有显著差异(P<0。
5) effective calorific value
有效热值
1.
The effective calorific value,composition and thermal stability of the smelting coal are all important for the COREX process,because they can influence the smelting process by influencing the coal consumption,the utilization rate of reduction gas,and the height of the fixed b.
在COREX流程中,主要检测熔炼煤的有效热值、成分和热稳定性。
2.
Coal consumption of COREX is too much and coke is still used to supply effective calorific value of coal and form a fix bed with carbon.
COREX的主要问题有两个,其一是煤耗过高,其二是仍需使用一定比例的焦炭,以补充有效热值和形成含碳固定床。
3.
At the same time,based on the study of anaerobic fermentation with several different biomass materials,the heating value,the theoretical biogas conversion rate and the actual biogas conversion rate were analyzed,and the effective calorific values between direct combustion and biogas making were compared.
本文以木薯秆为原料,采用批量单相厌氧发酵的工艺,初步探讨了影响木薯秆厌氧发酵的因素,同时在研究了几种不同生物质原料厌氧发酵制取沼气的基础上,分析了原料的热值、理论沼气转化率及实际沼气转换率,并比较了直接燃烧与制取沼气的有效热值,及木薯秆固液分离发酵与混合发酵的有效热值。
6) virtual value
有效值
1.
A new measurement for alternating-current virtual value is presented.
介绍了一种交流电有效值测量仪,该仪器以PIC12F629为核心,利用比较器,定时/计数器等单片机内部资源以及自动可调的参考电压构造新颖的测量方法,实现对输入波形的数据实时采集,通过计算得出交流电的有效值。
2.
According to the principles of numeration table, the author puts forward simple but practical methods of how to measure the mean values, virtual values and peak values of non sine waves.
根据数字万用表的测试原理,提出了用其测量非正弦波电压平均值、有效值及峰值的简单实用的方法。
3.
The AC voltage meter and the AC current meter used in power system are usually rectifying instruments, which adopt principle of responding to the average value of voltage and current and get the virtual value by using of the proportion between the average value and it.
电力系统中使用的交流电压表和电流表通常采用整流式仪表,其工作原理是对电网电压和电流的平均值响应,利用平均值和有效值的比例关系从而得出信号的有效值。
补充资料：有效F值
有效F值(Effective F number)，亦称有效光圈值。在装上特写圈或皮腔进行拍摄时，镜头和胶片的距离会增大，故尽管光圈刻度相同，而达至胶片的光量却变少。例如就连无限远摄影时的F：8，相当于实称原大摄影时有效F值的F：16。称此为特写时的曝光倍数。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条