对比度

To improve contrast and/or color purity, an apertured obstruction plate forming chicanes in the electron paths is arranged between the preselection plate and the fine-selection plate.

为改善对比度和／或色纯度，一个在电子路径中构成障碍的多孔板安置于预选板和精选板之间。

Lab model consists of three tunnels, the L channel represents the brightness, which controls the brightness and contrast of a picture, a channel including color from caroba to gray to bright pink (high-brightness value), and b channels including color from a bright blue to the grey to Browning (high-brightness value).

Lab模式由三个通道组成，L通道表示亮度，它控制图片的亮度和对比度，a通道包括的颜色从深绿到灰色到亮粉红色，b通道包括的颜色从亮蓝色到灰色到焦黄色。

Aberrant contrast was noted to spread into the intervertebralforamen or epidural space 16% of the time, being more common at cephalad spinal levels.

当异常的对比度超过16%时被记录下，这种情况常发生在头侧的脊柱阶段。

Some enhance efficiency will be good with enhance effect being not obvious.Under this condition,using gray scale bargraph transformation process makes coarctate gray scale distribution of original image sparse,and non-easy observed details clea...

对于这种情况就可以采用灰度直方图变换方法将原始图像密集的灰度分布变得比较稀疏，从而拉大图像的对比度并在视觉上达到明显增强的效果，使一些原本不易观察到的细节能变得清晰可辨。

The just noticeable differences of colorfulness, brightness, contrast and sharpness are studied based on subjective visual perception experiment.

利用主观视觉实验研究了色彩度、亮度、对比度和清晰度的人眼可察觉变化步长。

Then convolve the fingerprint image with the matched filter for removing noisy and increasing the contrast of ridges and valleys.

论文作者根据指纹图像中局部纹线方向和宽度选择相适应的滤波器进行滤波，并采用了一种用于指纹图像增强的匹配滤波方法，以局部纹线方向和局部纹线频率来构造一组与纹线方向和宽度相关的滤波器，最后达到去除噪声和增强峰谷对比度的目的。

Decolorize this layer: Image ?Adjustments ?Desaturate (shift+ctrl+u) and increase the layer's contrast, applying next option: Image ?

去色此图层：图象-调整-去色，用来增加此层的对比度。

I also wanted to desaturate a little some of the parts of armor, so I created HUE/Saturation layer control with mask.

我也想降低一点部分盔甲的饱和度，所以我创建了一个亮度对比度叠加层并用遮罩来控制。

Next, I duplicated the very back texture layer, pressed Ctrl+Shift+U to desaturate, placed it above all the other layers, then set the layer to Overlay and 40% opacity. This basically ups the contrast on the image.

接下来，将木板材质的图层复制一遍，按Ctrl+Shift+U去色，将其放置在所有图层的上面，将图层模式改为叠加，不透明度40%，这样就增强了图片的对比度。

The UV and IR spectroscopic studies of the monomer films showed that the photoreaction ratio of monomer (about 50%) was higher than the corresponding photosensitive polymer (about 10%, PVCi). The polarized IR spectra proved that obvious anisotropic absorption was displayed in the irradiated photosensitive film. With polarizing microscopy method, we found that these kinds of photoalignment films exhibited good alignment ability, and the stability of the photoalignment film could reach about 100℃. 2 A photosensitive self-assembled monolayer was fabricated that contained photo-cycloadditable groups, such as, coumarin and cinnamate. The reaction process were detected by contact angle method because the IR absorption of monolayer was very weak. The photosensitive self-assembled monolayer promote uniform alignment of nematic liquid crystals by LPUV, and it thermal stability could reach about 130℃. 3 A cationic bolaform amphiphiles was synthesized that had two photosensitive double bonds, and can be polymerized by ultraviolet. A layer-by-layer self-assembled deposition film was prepared in aqueous solution by using this material and poly (sodium 4-styrenesulfonate). The UV-Vis. spectra proved that the multilayers film was uniform and layer-by-layer. When LPUV irradiated the film, the photopolymerizable double bond underwent [2+2] cycloaddition, and the production of the reaction distributed along the polarized direction of incident LPUV. Polarized UV-Vis. spectra indicated that the irradiated self-assembled multiplayer film was anisotropic, and the dichromic ration is about 0.09, it is higher than the spin-coating method of photosensitive polymer or monomer. We used this anisotropic film as alignment layer of nematic liquid crystals, and obtained a uniform and stability alignment result, the static contrast ratio is about 100, which is very close to application of liquid crystal device. This thesis is an instance that the photochemical material was used in the physics region of liquid crystals, the route that was from photosensitive monomer, self-assembled monolayer film to self-assembled multiplayer film was undergone, by this logical research method photoailgnment of liquid crystal was extended and consummated.

围绕上述思路开展了如下工作：1合成了三种可进行光二聚反应的光敏小分子单体，LPUV 辐照制作了光控取向膜；用紫外-可见光谱法和红外光谱法分析了薄膜中的光化学反应，发现小分子的光反应程度可达到50%以上，至少比光敏高分子高出5倍；薄膜的偏振红外光谱证实，经过LPUV 辐照后薄膜出现了明显的各向异性；将小分子光控取向膜制成液晶器件，在偏光显微镜下观察看到均匀一致的液晶取向；并且热稳定性达到100℃左右，接近实用化要求。2制备了含肉桂酸、香豆素基团的自组装单层膜；采用接触角的方法监测自组装反应的动力学过程；紫外-可见光谱证实了自组装单层膜在石英基板表面形成；自组装单层膜经LPUV 辐照后能诱导液晶均匀取向，而且热稳定性可达130℃，热稳定性进一步提高。3合成了含有光敏双键的双季铵盐，在水溶液状态下将它和聚乙烯基苯磺酸钠沉积生成layer-by-layer 自组装多层膜，紫外-可见光谱证实这是一个逐层均匀的沉积；在LPUV 照射下，自组装膜中的光敏双键按照偏振方向发生[2+2]环加成反应，形成取向膜，用二向色性值评价的分子取向度高于高分子及小分子光控取向膜的水平；实验证明用自组装多层膜制成的液晶器件亮暗态均匀，静态对比度约为100，达到实用化器件的水平。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐