f layer

1. Fiberglass sleeving coated with polyurethane is manufactured with non-alkali fiberglass braided sleeving and coated with a layer of polyurethane and than thermoset to form F grade insulating sleeving.
   聚氨酯玻璃纤维软管系采用无碱玻璃纤维编织成管，并涂以改性聚氨酯树脂经加热烘干而成的F级绝缘软管。
2. Local government to bottom allied: The bottom layer receive upper level, the1 F receive a built-up layer Chan water success will come.
   地方政府对下联：下层蒙上层，一层蒙一层层层掺水水到渠成。
3. Comparative Study of Polar Ionospheric F Layer Observations with IRI in Both Hemispheres
   南北极电离层F层观测与国际参考电离层对比研究
4. Some computed results for parameters at top of F layer are given.
   文中还给出了以电离层F层作背景参数的数值计算结果。
5. The density of oxide fixed charge N_f and the density of trapping states N(?) at the interface between the A, laser-recrystallized polycrystalline silicon layer and the underlying oxide layer have been studied by high frequency and quasi-static state C-V technigues.
   我们用常规的高频和准静态C-V技术测量了氩离子激光再结晶多晶硅/二氧化硅界面的氧化物固定电荷密度Nf和界面态陷阱密度N（it）。
6. The mechanism causing the annual variation of the first ionisation for the F layer is the expansion and/ or the contraction of the upper atmosphere depending upon the seasons.
   决定F层每天开始电离时间的机制，是高层大气随季节不同而膨胀或收缩。
7. F in ite Layer Analysis for Layered and Elastic Half-space under Arbitrary Force Systems
   任意力系作用下的层状弹性半空间的有限层分析方法
8. Objective: To test the F_1 genetic purity of five two-line hybrid rice combinations, SDS-PAGE of seed storage proteins, ultrathin-layer isoelectric focusing of esterase isoenzyme and RAPD molecular markers were used in this report.
   目的：探讨利用种子贮藏蛋白SDS&PAGE电泳、酯酶同工酶超薄等电聚焦电泳和RAPD分子标记鉴定五个两系杂交水稻组合F1种子纯度的可行性。
9. The level of F-actin expression in the cytoplasm of outer layer is apparently higher than that of inner one, and this difference shows statistical significance.
   内层细胞胞质中的F肌动蛋白表达量较低，外层细胞胞质中的F肌动蛋白表达量明显高于内层细胞，两者差异有统计学意义；
10. Response to Electrical Stimulation of Layer ⅰ on the Neurones Located in Sublayer ⅱ_ ( a~ f) in Brain Slice of the Pigeon Optic Tectum
    家鸽顶盖脑片Ⅱ（a～f）亚层神经元对电刺激Ⅰ层的反应
11. Two Dimension C F Imaging of Northern section Earth-crust Layer Velocity Constructure of South-north Seismic Belts in China
    中国南北地震带北段分层地壳速度结构模型的二维CT成象电磁波井间CT成象技术及其在岩土工程中的应用
12. Let f ( r) denote the least order p ( r) of nonisomorphic r-regular graphs having the same path layer matrix.
    记f（r）为具有相同路径层矩阵的不同构的r-正则图的最少顶点数。
13. The electron density profiles of F layer were distorted severely in the course of the storm, and the key region of distortion was located at about 260 km.
    在某些时段内，F区电子密度剖面产生了特殊的畸变。
14. The morphology of F2 layer during the solar eclipse is examined, and the mechanism of its formation is discussed theoretically.
    本文着重考察了日全食时F2层的形态，对其形成机制进行了理论探讨。
15. Finally, a special model of the force distribution of each layer in the granular packing will be considered that is a 2D hexagonal packing under a vertical downward point force at the top layer.
    最后，我们研究了具有六角密排结构的颗粒系统在外力F（exl）作用下各层颗粒的作用力随水平位置的分布。
16. The varied relations to such parameters as thickness x s of frost layer, frost density ρ f, effective thermal conductivity k f and resistance r f of frost layer, surface temperature t s of frost layer and flow friction factor f have been obtained.
    获得了霜层厚度xs、霜层密度ρf、霜层综合热导率kf及热阻rf、霜层表面温度ts以及流动阻力系数f等参数的变化规律。
17. The diurnal, seasonal and solar variation tendencies of electron peak density ( N m E) or critical frequency ( f o E) in E layer are revealed preferably in the computing results.
    计算结果能较好地反映出E层电子密度峰值（NmE）或E层临界频率（foE）的日变化、季节变化以及随太阳活动的变化趋势。
18. Results: There were significant differences in the 8 parameters ( two dimensions and three dimensions) in the epidermal cell layer on the gap junctions between the meridian and the control. Site ( P < 0 001, F test).
    结果：发现经脉线上和经脉线外对照区表皮细胞层缝隙连接的二维、三维8个参数均差异明显（P<0001，F检验）。
19. Conclusion 1.Human amnion of 7-9 weeks consists of two cell layers and cell types that are the inner layer of epithelial cells and the outer layer of mesenchymal cells. The mesenchymal cells contain more F-actin in cytoplasm than that in cytoplasm of epithelial cells.
    结论1早期人胚羊膜由两层细胞即内层的上皮细胞层和外层的间充质细胞层组成，胞质中F肌动蛋白的表达量间充质细胞高于上皮细胞；
20. The annual variation of the solar height at the time of first ionization of the E2 layer is irregular, whereas this solar height of the F layer has a regular annual variation.
    该层每天开始电离时的太阳高度年变化是没有规律的，而F层每天开始电离时的太阳高度却具有有规律的年变化。
21. The distribution characteristic of auroral electrojet in AZS, is helpful for the studies of F layer and magnetosphere coupling in polar region and aurora dynamics.
    了解了极光电集流在南极中山站的分布特征，有利于极区电离层和磁层耦合及极光动力学的研究。
22. Atmospheric gravity waves can initiate the Perkins instability. After initiation, the Perkins instability grows into large amplitude oscillations of the F layer.
    大气重力波能触发Perkins不稳定性，在更短时间内增长成为大幅度电离层振荡。
23. Evoked responses of sublayer IIa f to electrical stimulation of layer I were recorded in 28 pigeon optic tectum slices using micropipettes, and effect of acetylcholine receptor antagonists atropine and tubocurarine on the evoked potential were analysed.
    在28例家鸽顶盖脑片上，以微电极记录电刺激顶盖I层引起的IIa-f亚层诱发电位，并观察乙酰胆碱受体拮抗剂阿托品和筒箭毒对诱发电位的影响。
24. At the same time, the speed distribution function f(η) is constructed, the iteration equation of boundary layer thickness δ( x) is required and the momentum integral equations of boundary layer are solved.
    强调构造边界层内速度分布函数并设法得到边界层厚度的迭代式式对求解边界层动量积分方程的重要性。
25. After the fault activity ′ s being ended, the fault F 1 through salt layer was quickly closed. The butted joint of sandstones and mudstones and the good quality cap rocks caused the natural gas to be preserved in the traps.
    断层停止活动后，穿盐断裂F1受压很快垂向封闭，侧向砂泥对接以及良好的盖层品质使天然气得以保存。
26. The soil F showed obvious leaching features in soil profile, and the contents of soil F in bottom layer were higher. The soil and water erosion process in surface layer could increase fluoride pollution.
    研究区土壤全氟、水溶性氟均表现出明显的淋溶特征，以底土层较高，而水力作用下的表土侵蚀过程可能会加重氟污染状况。
27. A new layer is designed and added in the model to realize the communication between mobile phone and ordinary E-government through pre-defined protocol SMS. F series algorithms in 3G are used to guarantee the confidentiality and integrity of the pre-defined protocol SMS ( short message service).
    模型中新增了一个自行设计的移动层，使得手机与普通电子政务可以通过预定义的协议短信实现相互之间的通信，所采用的3G中的F系列算法保证了协议短信的机密性与完整性。
28. Firstly, we takes statistic variable F to decide granular layer. Secondly, we apply knowledge discovery algorithm based on the model to define distance formula.
    该算法首先利用多阶段思想，结合F统计量进行粒度层划分及确定；其次，运用基于新模型的知识发现算法，重新确定距离公式。
29. A dual-layer structure was formed on F/ M steel and austenitic steels. The outer layer was Fe-rich magnetite structure, while the inner layer was Cr-rich spinel structure.
    F/M钢和奥氏体不锈钢表面氧化膜一般为两层结构，外层为富Fe的磁晶石结构，内层为富Cr的尖晶石结构。

noun

1. the highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission

   Synonym:    Appleton layerF region