无光的

Based on the principle of light-pen mode non-track three dimensional coordinate measuring technology, the paper uses PSD as the photoelectric receiver and point light modulated by frequency to measure coordinates.

本文通过对光笔式无导轨三坐标测量的研究、提出了以PSD(Position Sensitive Detectors，位置检测传感器)作为光电接收传感器，用高频调制光作为点光源，进行位置坐标测量的新思路，以提高整机的精度。

A double-pass schlieren system using a combination of lenses and mirrors was designed for non-intrusive visualization and measurements of large-field flows such as internal waves.

为了实现对内波等流场的大视场无干扰竖向显示测量，设计了一种透镜和反射镜结合使用的平面反射双光程形式的纹影系统。

The snow lies warm as cotton or down upon the window sill; the broadened sash and frosted panes admit a dim and private light, which enhances the snug cheer within.

东方露出一点耀眼的古铜色的光彩，预示着天就要亮了；可是西边的景物，还是很模糊，一片昏暗，无声无响，似乎是笼罩着地狱之光，鬼影扑现着，好像是非人间。

In this paper,the phase distortion has been discussed,by using different reconstruction beam to reconstruct digital holographic image of 3D ob- ject in lensless Fourier holography.

本文研究了离轴无透镜傅里叶变换数字全息中，用非原参考光再现三维物体而引入的相位畸变问题，通过详细的理论分析，得出相应的相位畸变表达式。

The lensless Fourier transform holograms thus formed were digitally recorded and the experimental results show that the reconstructed images and the interferogram can be evaluated for object deformation.

在光纤数字全息光路中引入自聚焦透镜，利用其特有的成像特性，作为物光波的中继传输器件，构成一套紧凑型光纤数字无透镜傅里叶变换全息记录系统，以实现对微小物体的全息记录与数值再现。

Importantly, depletion of ARMS facilitated UVB-induced apoptosis in melanoma cells through inactivation of MEK/ERK pathway, which is not constitutively activated in most cases of acral lentiginous melanoma, the melanoma subtype found mostly in Asians.

更重要的是，减少ARMS在黑色素细胞癌细胞的表现，会促进紫外线B光诱发之细胞凋亡，其作用机转是透过MEK/ERK传递路径之抑制，此路径在多数亚洲人常见的肢端小痣型黑色素细胞癌并无自身活化之现象。

The energy spectra of hot electrons have been measured using the magnetic spectrometers, fitted with the LiF thermoluminescent dosimeter which were calibrated using Cs~(137)γ-ray sources, in the interaction of a 130 mJ, 60 fs, 800 nm, 1∶10~(-6), 7.0×10~(17) W·cm~(-2) P-polarized laser incidence on Cu foil target at an angle of 45° with respect to the target normal without any prepulse.

在激光能量130mJ，脉宽60fs，波长800nm，对比度1∶10-6，激光与靶法线成45°夹角， P偏振，靶面激光峰值功率密度约为7.0×1017W·cm-2，无预脉冲的条件下，采用电子谱仪与经γ标准源标定的LiF热释光探测器相配合，测量了飞秒激光薄膜靶相互作用中产生的超热电子能谱。

In this experiment setup, a polarized common-path optical heterodyne interferometer is able to measure the twist angle and untwisted phase retardation of TN-LC very precisely.

实验中所使用到的光学架构，为一极化共光路径光学外差干涉仪，其结合了椭圆仪的概念，以透射的方式，将TN-LC之扭转角以及无扭转相位延迟这两个光学参数，精准地量测出来。

Early used to detect objects without photoelectric sensor is a small metal cylindrical equipment, with a camera calibration transmitter, will focus on optical receivers, the receiver will be receiving a cable superimposes the vacuum tube amplifiers.

早期的用来检测物体有无的光电传感器是一种小的金属圆柱形设备，发射器带一个校准镜头，将光聚焦射向接收器，接收器出电缆将这套装置接到一个真空管放大器上。

SEM, Raman and PL spectrum were adopted to characterize the surface, structure and photoluminescence property of samples. In comparison with those prepared by anodising p type silicon, the porous silicons prepared by non-acid hydrothermal method have smooth surface, regular shape of pores and higher PL efficiencey.

实验采用扫描电镜、拉曼光谱和光致发光谱对样品表面形貌、结构及发光性能进行表征，并与用常规电化学阳极氧化法制出的多孔硅进行了对比研究，研究结果表明用无酸水热法制出的多孔硅表面平整，孔的形状规则，发光效能提高更多。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。