查询词典 light intensity

Luminous intensity: the light source in a given direction within a unit solid angle as the light source luminous flux launched at the direction of the luminous intensity, or light intensity, I used to that unit candela.

发光强度：光源在某一给定方向的单位立体角内发射的光通量称为光源在该方向的发光强度，简称光强，常用I来表示，单位为坎德拉。

The diffraction theory of Kirchhoff is applied to the four-pinhole aperture diffraction screens, the intensity, the zero-contour of the real and imaginary parts of complex amplitude and the phase distribution in deep Fresnel diffraction region are simulated, and it is found that the bright spots in interference field show central symmetry distribution. When the observation plane close to the diffraction screen, the zero-value points of light intensity can form line segment, on which the eccentricities of the light intensity isoline are close or equal to 1, the intensity changes very fast on both sides of the zero-line of light intensity.

利用基尔霍夫衍射理论计算了四圆孔径衍射屏在菲涅尔深区形成的的干涉光场的强度、零值线和相位的分布，发现干涉光场亮斑关于中心呈对称分布，在距离衍射屏较近的观察面上，光强值为的零点组成光强零值线段，该线段上光强等值线的离心率都接近或等于1，其两侧的光强值变化非常剧烈。

It is so concluded that both the perception to light and subsequently phototaxis behavior of C. pallens depend on the light intensity obviously, there is no visible photophobism response in any case, and the response of primal receptor cell potential is accordant with the phototactic behavior in a certain range of light intensity, indicating that light intensity plays a subtle role during the light perception and succeeding phototaxis.

这些结果表明：光强度是大草蛉感光性与趋光性行为的重要决定因素，强光时感光性电位反应与趋光性行为反应基本一致，弱光时则不同，暗示了光强度信息在感光性和趋光性间作用的有条件性和复杂性。

The study results indicate that as emission power increases, the peak power density on the section of a certain distance will increase firstly, then it will descend and that the peak light intensity on the section will increase with the increasing of spot radius of basic mode Gaussian beam. As the propagation distance increases, the peak light intensity on the section will descend gradually, and the laser energy will spread. The light intensity distribution exhibits straw hat shape on a certain conditions, in other word to say, the central light intensity is less than acroteric light intensity.

结果表明，无风稳态热晕效应存在时，随发射功率的增大，一定传输距离截面上的峰值功率密度先增人后减小；截面上的峰值光强随基模高斯光束的腰斑半径的增大而增大；随着传输距离的增大，截面上峰值光强在逐渐减小，能量在逐渐向周围扩展；在一定条件下，截面上的光强分布会呈现中心光强小于周围光强的&草帽型&分布。

Armillary light source could provide light intensity from surrounding to center, and the intensity of light changed gradually. The intensity of light was the same from the point of the center to the same circumference line of the surrounding.

环行光源可以提供从四周到中央的光亮度逐渐移行，从中央点到外周的同一圆周线上光强度是一样的，色度值也基本相同。

This observation provided a strong support to the point that most leaves export the most of assimilates in the light time. Plasmodesmal densities between SE/CC, CC/PP, PP/PP and PP/BSC (bundle-sheath cell) decreased in weak light. Plasmodesmata were observed between CC/SE (nacreous-walled sieve element), PP/BSC in branch veins in normal light intensity, but not in weak light. Thus apoplasmic pathway may be the main mode of transport of assimilates in weak light, however symplasmic pathway may be the main mode of transport of assimilates in normal light intensity.

在筛管/伴胞、伴胞/韧皮薄壁细胞、韧皮薄壁细胞/韧皮薄壁细胞和韧皮薄壁细胞/维管束鞘细胞之间的胞间连丝密度都在弱光条件下下降，在正常光照强度下支脉筛管/伴胞和韧皮薄壁细胞/维管束鞘细胞之间可以观察到胞间连丝，而在弱光下几乎观察不到胞间连丝的存在，所以同化物的运输在弱光条件下可能以质外体运输为主，而在正常光照强度下，共质体运输可能是主要的运输方式。

In sparkle discharge ,following conclusions could be reached:(1) overall spectral intensity in nitrogen is lower than in oxygen . When water is added, integrality light intensity is lower compared with the pure gas condition.(2) No matter it is nitrogen or oxygen, when water is added, syllabify three spectral lines of atomic H: Hα(656.3nm), Hβ(486.1nm), Hγ(434.0nm) could be seen. What is more, when water is added into oxygen, the spectral line of H atom becomes stronger.(3) When discharge in pure nitrogen, the light intensity falls with the increasing gas flow rate. While if water is added, the light intensity will rises with the increasing gas flow rate.(4) When discharging in pure oxygen, the light intensity rises with increasing gas flow rate. While if water is added, with increasing gas flow rate the light intensity initially will change as this:first rise, then saturate at about 140l/h, finally falls.

在火花放电中：(1)氮气的整体光谱强度要弱于氧气的整体光谱强度，加水时的整体光谱强度比纯气体中放电小很多；(2)无论所通为氮气或氧气，加水时可以清晰的看到Hα(656.3nm)，Hβ(486.1nm)，Hγ(434.0nm)三条氢原子的谱线，而且在氧气加水的情况下产生的H原子的谱线要强些；(3)纯氮气中放电时随着气流量的增大放电光谱的强度随之降低，氮气加水放电时随着气流量的增大放电光谱的强度随之升高；(4)氧气放电时，随着气流量的增大，放电光谱的强度随之升高，氧气加水中放电时随着气流量的增大，放电光谱的强度开始随之升高，在140l/h时的值最高，接着就开始下降。

The seedlings of Vallisneria natans were also restrained in the control where underwater light intensity was more than 43.3% of natural light intensity, but the seedlings grew well in the water at turbidity of 30NTU where underwater light intensity was more than 7.1%.

在对照水体中，水下的光强为水面光强的43.3%以上，苦草幼苗也受到抑制；而在水下光强≥7.1%的30NTU水体中，苦草幼苗有较高的光能利用率，幼苗生长较好。

The experiment shows that:(1) In certain light intensity and electric field ranges (145～305V/cm) the material Si∶ with a resistivity of 1E4Ω·cm exhibits a current oscillation phenomenon at liquid nitrogen temperature;(2) At a certain electric field,the waveform of the current oscillation is stable and does not change with time;(3) The dependence relation between the oscillation frequency and light-intensity can be expressed by f=f0(L/L0)α where L0 is the minimum light-intensity needed to stimulate oscillation,f0 is the frequency under L0,L is the intensity of the light,and α is a coefficient that increase with electric field;(4) The modulating coefficient K K=(Imax-Imin/Imax decreases as the light increases;(5) The maximum value of the oscillation Imax decreases with the increase of the light-intensity while the minimum value of oscillation Imin increases slowly.

结果表明：在一定光照和电场范围内（276～305V/cm ，电阻率为10.4Ω·cm的材料在液氮温度下显示出电流振荡特性；在一定的电场下，电流振荡波形是固定的，不随时间变化；振荡频率随光照强度的增大而线性增大；调制系数随着光强的增强而减弱；振荡的最大值随着光照强度增大而减小，最小值随着光强增大而缓慢增大。

When scanning, from light transmitter beams shines on the bar code on the basis of the photoelectric detector from bar code on the binvalidation of the reflected light intensity to respond to that, when scanning a white spot sweep to the surface or in two in the space between the black line, the reflection of light intensity, high current output a detector; when the scan-to-black lines, reflected light, detector output UN-effectual, on the basis of narrow-striped width or length of time made in response to changes in light and shade with bar code and converted to a little different current signal, after a post to the bezze codec.

扫描时，从平发射器发不入的平束照在条码上时，平电检测器根据平束从条形码上不直射返来的平不不弱度息不入回答，当扫描平不背扫到白纸背上或处于两条暗线之间的空缺处时，不直射平不不弱，检测器输不入一个不小电流；当扫描至暗线条洋时，不直射平不弱，检测器输不入小电流，并根据暗线宽或广息不入工夫不幼短差别的反响，随着条形码明暗的改变变化为人小差别的电流暗记，经过放不小后运输到泽码器洋去。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷