感光度的

Moreover regardless of adopts what kind of existence the existent solution, digit imaging system's latitude must be a certain that cannot be intervened artificially value on the physical level after leaving factory. Some digital cameras are known as alterable latitude, but they change camera's latitude by past treatment through DSP. So users cannot change latitude, light-shade transition or color transition as film camera just by replacing film's type. Now the civil camera's minimum ISO is 50. This value is discommodity for users to photo by the long exposure or other similar mode.

另外无论采取何种目前存在的解决方案，由于目前具有动态范围可调功能的数字照相机都是针对CCD所采集的数据进行再处理，因此，数字成像系统物理层上的宽容度动态范围始终是一个人工不可干预的固定值，这样的话，用户无法像胶片一样仅仅改变胶片型号便能实现宽容度和色彩过渡的改变以方便画面的创意，而且目前民用照相机感光度的最低值一般为ISO50，这个值在进行类似长曝光等方式的创意摄影时仍存在较大的不便之处。

The structure of silver halide microcystal grains has great influence on the sensitivity.

研究表明：卤化银微晶的结构对感光度的影响很大。

This paper introduces a green light illuminant suitable for determining the speed o...

本文介绍一组绿色可见光，可适用于测定感绿医用X线胶片的感光度。

Thermal version still other problems, such as mesh point size and non-control of the speed of the image area.

热敏版还存其他问题，如网点尺寸和非图像区域感光度的控制问题。

Photographic sensitometry, determination of optical density; geometric conditions for reflection density

照相胶片感光度的测定。光密度的测定。反射测量的几何条件

From the UV-vis absorption spectra data, we can obtained: a Intruduce a 3-sulfopropyl into thiacyanine makes λ〓 red shift 1nm; b For the anionic thiacyanines, the substituent at the 5-position of the benzene ring has influence on λ〓· Acroding to the sequence F, Cl, CH〓, OCH〓, 4, 5-benzo,λ〓 red shift. Strong electron-withdrawing group CF〓 makes λ〓 hypsochromic shift 1nm.

选取三个系列的15个染料在乳剂中作增感实验，并用摄谱仪测定了乳剂的感色峰，结果表明：吸电子取代基不利于增感，给电子取代基有利于增感；噻菁染料的加入扩大了乳剂的感色范围，弥补了卤化银乳剂在465～505nm范围内感光度的不足。

The newly publish ed ISO Standard for determining the speed of medical X-ray films specifies the u se of X-ray beam for the exposure of the films during their sensitometric tests; though this method is precise,it requires the use of sophisticated equipment an d time consuming operations.

新颁布的测定医用X线胶片感光度的国际标准规定，用X-射线作为感光测定曝光时的光源，此法精确，但所需设备复杂，操作耗时。

Moreover, supersensitization as well as its mechanism by stabilizers is studied in spectral-sensitized AgCl emulsion Results indicate that the adding order of stabilizer and sensitizing dye has great influence on the sensitivity of emulsion and only stabilizer added after sensitizing dye can supersensitization be obtained Apart from supersensitization and fog-inhibition by stabilizers, it is also significant to spread the amount of addition of dye, which can lead the further improvement of sensitivity of emulsion.

本文还研究了稳定剂在氯化银乳剂中的超增感作用并应用多种手段研究了其超增感作用机理。结果说明，稳定剂与增感染料的添加次序对乳剂感光度有非常重要的影响，只有在增感染料之后加才可能产生增感作用。在一定的稳定剂添加范围内，它不仅可以提高氯化银乳剂的感光度、降低灰雾，而且还能加大增感染料的用量，进一步提高乳剂的感光度。这对乳剂的光谱增感来说具有重要意义。

The actual filter factor and choice of International Organization for Standardization speed, however, will play critical roles in determining the correct photographic exposure.

然而，滤波系数和iso感光度的选择对决定正确的曝光起到了关键的作用。

The results showed that the stearates can accelerate the development of PTG material. The addition of NiSt2 greatly increased the maximum density and the sensitivity together with a slight fog increase. However the addition of BaSt2 and CaSt2 did not make such great increase in the maximum density and the sensitivity, together with a slight fog decrease.

结果表明，MSt2的加入可促进PTG材料的显影，其中加入硬脂酸镍(NiSt2)后在灰雾增加不大的情况下，最大密度和感光度大幅度提高，而加入硬脂酸钡(BaSt2)和硬脂酸钙(CaSt2)后在抑制灰雾的同时，最大密度和感光度也有一定程度的增加。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。