查询词典 transmittance

On mountainous sites, grade Ⅰ or Ⅱ stands including land below the crown of the secondary broadleaf forest and the Chinese-fir plantation or east-facing, shady dry land could be considered for the plantation. The transmittance of crown in the areas should be 55%~60%. One-year-old high quality seedlings above 25 cm tall and 0.25 cm in diameter near the ground-level should be used. For high-yield, field cultivation, shading facility should be considered and seedlings of taller than 15 cm and greater than 0.15 cm in diameter near the ground should be applied. The appropriate density and sunlight transmittance ought to be 30 cm×30 cm and 50%, respectively.

结果表明，利用山地种植，选择透光率为55%~60%的Ⅰ、Ⅱ类立地的残次阔叶林和杉木林冠下，或地形隐蔽、东向的山垅旱地，选用苗高25 cm以上、地径0.25 cm以上的1年生优质苗木造林；利用农田进行庇荫设施高产栽培，应选用苗高在15 cm以上、地径0.15 cm以上规格的苗木栽植，适宜栽植密度为30 cm×30 cm，遮阳透光率在50%左右。

Because the EPWE method is designed to derive easily the evanescent modes which can be used for the matching boundary conditions, we can get the transmittance for the semi-infinite photonic crystal. In this study, some interesting behaviors can be observed, for example, the transmittance is very sensitive to the surface we chose. The transmittance even can be almost 1 or 0 when the cutting planes of photonic crystal are different for the specific frequency. In this proposal I want to see the reason of the total reflection which seems to be conflicted with the existence of the propagation modes at that frequency and what will be happened when we consider the finite thickness case.

在EPWE 的方面，在这三年的时间里，我会尽量完成有限厚度的光子晶体的计算，因为以前主要算的是半无穷的光子晶体的计算，当中也看到了一些很有趣的行为，比方某些频率下，其穿透率与它的介面有很大的关系，因为，当光子晶体的切面不同，在特定频率下，其穿透率可以由几乎全穿透变成全反射，这里我想看看如果考虑厚度，到底会对系统有什麼影响。

By analyzing the changes of water vapor concentration and the transmittance of 2400 cm-1 along with time, the results indicate that the changes of water vapor parameter of local area environment take effect on the transmittance of atmospheric model.

结合水汽的变化情况，分析了2400 cm-1的透过率随时间变化情况，说明在局地环境下水汽参数变化会对模型计算的大气透过率带来影响。

By computer simulation, we analyze the influence of the incidence plane, incidence angle and thickness of air gap on transmittance, and the dependence of the transmittance on wavelength is given in the spectral range which is required by the instrument system using Sellmeier dispersion equation. The transmittance of Grand-Taylor prism is tested in experiment, and the results are in good agreement with the theoretical results, so the correctness of the theory is verified.

论述了自行设计研制的偏振干涉成像光谱仪的工作原理，分析了其核心部件格兰-泰勒棱镜的分光机理；运用光线追迹方法，推导出了格兰-泰勒棱镜全视场角透过率计算公式；通过计算机模拟分析了入射面、入射角和空气隙厚度对该棱镜透过率的影响，并利用方解石Sellmeier色散方程，给出了该棱镜在仪器系统要求的光谱范围内透过率与波长的关系曲线；实验测试结果与理论计算公式相符，验证了理论公式的正确性。

As for top-hat beam and transmittance of 0.1-1.0 of Gaussian beam intercepted aperture, they were measured to transmittance curves of Z-scan.

但由于实验过程中得到的高斯-贝塞尔光束不易加以确认，所以在实验上利用灵敏度较高的top-hat 光束进行测量。

The testing mechanism of IR spectrum transmittance is studied and the testing method of IR spectrum transmittance is established.

研究了烟幕红外光谱透过率的测试机理，建立了烟幕红外光谱透过率的测试计算方法。

We measured the light transmittance, reflectance and photosynthetic capacity of leaves of Mikania micrantha and 19 other species of plants (herbal and woody sp.) in the same community. M. micrantha and other plants were similar in transmittance and reflectance spectra and showed no apparent differences in the relation between leaf-optical and photosynthetic-related in the same community.

该文对薇甘菊及其所在群落内19种植物的叶片透射率、反射率和光合特征指标进行了测定，结果表明：薇甘菊与其它植物透射和反射图谱的变化趋势都比较相近，在各个光学特征指标与光合相关指标的相互关系中，薇甘菊并没有表现出区别于同一群落内其它植物的特征。

Design the structure of high performance Low-E film including its material and thickness of every layer according to basic optical theory. Carry out an innovative work to calculate its optical performance by characteristic matrices and optical admittance. Compare the results with those we get by traditional measurement.3. Prepare Low-E films with RF magnetron controlled reactive sputtering. The result shows that in the visible region (380nm-780nm), the highest transmittance is 82.4% while the average value is 75%. In the NIR region (780nm-2500nm), the average transmittance is 16.2%. These characters can fit the demand of the glass used in architecture and cars, and also in other applications.4. We novelly use the material Titanium as protective layer to solve the problem that Ag layer would disappear when depositing the second TiO_2 layer. As the protective layer, Ti does not increase the number of targets so as to lower the costs. The thickness of the protective layer Titanium is adjusted by controlling of sputtering time. Results shows the Low-E films get the best optical character when the sputtering time of Titanium is 20 seconds5. We novelly proposed a new transmittance quality factor Q=_·(?_-__ to evaluate the performances of Low-E films, which makes it easier to judge the qualities of Low-E film.6. The photocatalysis of Titanium dioxides is researched and introduced into Low-E films. Sb-doped TiO_2 thin films are prepared. Its photocatalysis and hydrophilicity are measured.

论文的工作主要有：1、总结了低辐射薄膜的制备方法，性能，以及国内外最新研究进展和应用，并对两种类型的低辐射薄膜进行了比较。2、从光学基本理论开始，设计了离线低辐射薄膜的结构，包括每一层的材料和厚度，并创新性的用特性矩阵和光学导纳理论计算了该离线膜的光学性能，利用软件对其进行了仿真，与实际制备的薄膜所测量的性能相比较。3、完成在实验室仪器上制备低辐射薄膜，掌握其工艺条件，解决了超薄金属膜的制备问题，所制备的低辐射薄膜在可见光区(380hm-780hm)最高可达82.4%，平均透射率为75%；在近红外区(780nm-2500nm)的平均透射率为16.2%，其性能达到建筑物幕墙玻璃，汽车前挡玻璃等应用标准，并为进一步的大规模生产打下基础。4、针对中间银层在镀上层膜时易被氧化这一工艺难题，本研究创新性的提出用Ti膜作为保护膜，没有增加新的靶材，提高了生产效率，并节约了生产成本。

This paper measured the transmittance spectrum of Sr_3NbGa_3Si_2O_(14),a new kind of piezoelectric single crystal,from ultra-violet to visible wavelength and studied its optical activity by a novel method—measuring the transmittance spectra in Z-direction between parallel polarisers. And the rotation dispersion was fitted.

本文测定了紫外、可见光区新型压电晶体—Sr3NbGa3Si2O14的透过率，并利用一种新方法即通过测量晶体在平行偏振系统中的透过率谱研究了其旋光性，且拟合出旋光色散曲线。

In order to save the rare iceland and increase the transmittance of polarizing prism,a type of polarizing prism combination of iceland and glass is designed. The prism have super high transmittance of o light when the incident angle is Brewster's angle.

为了节省稀有昂贵的冰洲石晶体材料，尽量提高偏光棱镜的透射率，提出了一种采用冰洲石晶体与光学玻璃组合的方法，给出了以布儒斯特角入射来提高o光透射率的偏光棱镜设计。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。