F value

美 [ef ˈvæljuː]英 [ef ˈvæljuː]
  • 网络F值;光圈值
F valueF value
  1. Distributive feature of f value of different coal body structure coal

    不同煤体结构煤的f值分布特征

  2. You see there the f value ?

    看到f值了吗?

  3. A Design of Cold Spot Temperature Measurement and F Value Calculation System for Can Sterilization

    罐头杀菌冷点温度和F值测定系统的设计

  4. Test and research on comprehensive index F value for prediction of coal and gas outburst

    煤与瓦斯突出预测综合指标F值的试验研究

  5. Sterilization efficiency : the tested F value was above 60 min.

    灭菌效力实测F值超过60min;

  6. Calculation of F Value of High Temperature Pasteurization in Soft Canned Fish Food

    水产软罐头食品的高温杀菌F值计算

  7. Study of F value in solution of salicylic acid and alcohol by dioptre analysis

    水杨酸醇溶液折光分析法F值研究

  8. But F value of cold-point decreased as the increase of initial water content .

    中心冷点处F值随水分含量的增加而下降。

  9. RESULTS The alcohol extract of each plant drug showed special TLC spot and R f value .

    结果:每种植物药醇浸出液的鉴别试验显示有其特定的薄层色谱斑点Rf值。

  10. The Qf 0 value and the τ f value increased to be saturated .

    Qf0值和τf值也都随着取代量的增加而上升,最后达到饱和。

  11. Research and development of a computer-based real-time acquisition and displaying system for food temperature and F value / C value

    食品温度及F值/C值计算机实时采集显示系统的研制

  12. High F Value Few-peptide and Its Physiological Function

    高F值寡肽及其生理功能

  13. The Enzymatic Preparation of high F Value Oligopeptide and the Evaluation of its Anti-fatigue

    酶法制备玉米高F值寡肽及其抗疲劳功能评价

  14. Effect of quantitative acupuncture manipulation on F value in the patient of acute angle-closure glaucoma

    量化针刺手法对急性闭角型青光眼F值的影响

  15. It could function as data receiving , F Value calculation , real time curve drawing , data saving and outputting .

    该装置具备数据接收、F值计算、实时曲线绘制和数据保存的功能。

  16. The discrimination selected nearly stations have a good validity than the stepwise discrimination with F value .

    选择邻站用判别分析方法建立的恢复模型,效果更好。

  17. At last , the control of F value in step-wise regression models and the selection of forecasting factors were discussed .

    并对逐步回归分析法中F值的控制和预报因子的选取等问题作了深入的讨论。

  18. Cooking with higher temperature and pressure , temperature of cold-point increased faster , and F value rose up more quickly .

    高温高压下蒸煮,中心冷点升温更快,F值的增加速率成倍上升。

  19. The high F value few-peptide is one kind of small peptide mixture contain high branch amino acid and low aromatic amino acid .

    高F值寡肽是一种具有高支链氨基酸含量和低芳香族氨基酸含量组成的小肽混合物。

  20. According to the time occupancy , occupancy degree and accuracy , recall , F value for the performance evaluation , etc. , the system is good .

    根据时间占用度,空间占用度及准确率、查全率、F值等进行了性能评测,系统良好。

  21. However , the f value still needs to be readjusted in soils with high organic matter ( more than 50 g kg-1 ) .

    对于有机质含量接近和高于50gkg-1的土壤,校正因数还需要修改。

  22. The study discovered that the dilution ratio almost had no effect on cellulase activity when F value was adjusted to F0.82 .

    研究发现将稀释倍数F校正为F0.82后,计算得出的纤维素酶活性值几乎不受稀释倍数影响。

  23. Especially , the precision , recall and F value of complicated organization name recognition is increased by 0.24 % , 1.39 % and 0.86 % respectively .

    特别是结构比较复杂的机构名识别准确率提高了0.24%,召回率提高了1.39%,F值提高了0.86%。

  24. With the modified model and the optimized k f value , the effects of the surface film in reducing ammonia volatilization under different environmental conditions were simulated and analyzed .

    在该模型中,用选定的kf值对表面分子膜抑制氨挥发的效果与pH、风速、水深和温度等的关系作了进一步模拟分析。

  25. The best solvent selectivity for IPC can be obtained by comparing the ratio of R f value of different solvent systems on TLC plate with compounds being isolated .

    最佳溶剂选择性可通过不同溶剂系统在薄层板上所给难分离物质对的最大Rf比值确定;

  26. Through enzymatic hydrolysis , preparation of high F value oligomeric peptide , protein-depth development of basil to enhance the economic value of perilla and resource utilization .

    通过酶法水解,制备高F值低聚肽,深层次开发紫苏蛋白资源,提高紫苏的经济价值和资源利用率。

  27. The effects of source and concentration of carboxymethyl cellulose ( CMC ) , cellulase level and dilution ra-lio ( F value ) on cellulase activity were studied .

    本文采用DNS法测定黑曲霉纤维素酶活性,研究了底物羧甲基纤维素钠(CMC-Na)来源、浓度、纤维素酶浓度和酶液稀释效应对纤维素酶活性测定的影响。

  28. Objective To explore the effect of quantitative acupuncture manipulation on aqueous outflow ( F value ) in the patient of acute angle closure glaucoma at " clinical prodromal stage " .

    目的:探讨量化针刺手法对急性闭角型青光眼的临床前期眼房水流量(F值)的影响(以下简称F值)。

  29. The formula of nutritive beverage was composed of 1.2 % high F value oligo-peptide solution , 4 % fruit juice , 6 % sugar and 0.15 % citric acid .

    以制得的高F值低聚肽溶液为基料,研制肽饮料和酸奶,肽饮料最佳配方为高F值低聚肽溶液1.2%,果汁4%,砂糖6%,柠檬酸0.15%。

  30. The Q ′ f value of the sample decreases with the increasing of Zr content , while the temperature coefficient of resonator frequency of the sample increases with the increasing of Zr content ;

    当Zr/Sn<1时,样品的Q×f值随Zr含量的增加而降低,谐振频率温度系数随Zr含量的增加而增大;