查询词典 light-year

The grating of plane change distance is applied to break the white light into monochromic light at the 3W1B in the BSRF,and obtain a good monochromic light source of good energy resolution,high intensity,broad energy spectrum.

在北京同步辐射源的3W1B束线上，利用平面变间距光栅分光，获得单色性较好，强度较高，能谱连续可调的单色光源。

After analyzed the advantages and disadvantages of nephelometric methods, according to the topic, select the scattering-light method,and put the light detector at 90°to decrease the effect of stray light.

在分析和比较其优缺点后，针对课题要求选择散射光式测量方法；并选择以90°角作为检测角度，以减小杂散光的影响。

Recently a third hybrid light-emitting layer has been developed that uses nonconductive polymers doped with light-emitting, conductive molecules. The polymer is used for its production and mechanical advantages without worrying about optical properties. The small molecules then emit the light and have the same longevity that they have in the SM-OLEDs.

近十几年来，随着人们对半导体发光材料研究的不断深入，LED制造工艺的不断进步和新材料的开发和应用，各种颜色的超高亮度LED取得了突破性进展。1993年，开发出来的以蓝宝石为衬底的GaNLED就是典型代表，它能发出绿光、蓝光和紫罗兰光。

Although LEDs do experience a gradual and permanent reduction in light output during their normal operating life - caused either by a reduction in the light-generating efficiency of the LED die, or a reduction of the optical path within the LED package - the Dialight street LEDs are expected to provide about 70 per cent of their original light output after 50,000 hours or 10 years, provided that they are not overdriven.

在正常操作下，LED必需要经历光输出逐渐减少的过程，而这个过程是会一直持续着的。导致光输出减少的原因可能是由于LED产生光的效率在降低，或者是由于LED压缩包内的光径在减少。不过，只要没有超负荷使用，Dialigh的LED路灯在工作50，000小时或10年后，还可以达到70%原始光输出的能力。

We found out one kind of new orange-red long afterglow material La2O2S: Eu3+, Mg, Zr.2 In the phosphor Gd2O2S, Mg, Ti which was prepared by high-temperature solid-state method, the orange afterglow phenomenon can be seen after illuminated with UV light.3 Using the high-temperature solid-state method, Gadolinium oxysulfide phosphors doped with rare earth ions were synthesized. We can observe the red or orange phosphorescence in Gd2O2S doped with Eu3+, Sm3+, Tm3+, Yb3+, Dy3+, Er3+, Nd3+or Ho3+. This is a new result of the long afterglow phosphors research.4 Using the microwave radiation method, the new Sm3+ doped gadolinium oxysulfide phosphor, which has the orange-red long afterglow emission after illuminated with UV light or visible light, was synthesized for the first time.5 In fluorescent materials YOX doped with europium ions, the long afterglow phenomenon wasnt observed but the blue luminescence of Eu2+ and red luminescence of Eu3+ are simultaneously examined. This is a new result of the valence stability and change of Eu2+ in yttrium oxyhalide .We systematically studied the effects of the host, addition agents and reaction atmosphere on the valence change and fluorescence property of europium ions.

经过系统的研究总结得到以下的结论与成果： 1采用高温固相反应法合成了一系列稀土离子掺杂的硫氧化镧发光粉，发现了该体系中Eu~(3+)的长余辉发光，从而得到一种迄今未见文献报道的红色长余辉发光材料：La_2O_2S：Eu~(3+)，Mg，Zr； 2在Gd_2O_2S，Mg，Ti磷光粉中观察到橙色的长余辉发光现象； 3采用高温固相反应法合成了一系列稀土离子掺杂的硫氧化钆磷光粉，在掺杂Eu~(3+)、Sm~(3+)、Tm~(3+)、Yb~(3+)、Dy~(3+)、Er~(3+)、Nd~(3+)、Ho~(3+)的Gd_2O_2S中观察到红色和橙色长余辉发光； 4首次采用微波法合成了Gd_2O_2S：Sm~(3+)，Mg，Ti磷光粉，该磷光粉经紫外或可见光激发后呈现明显的橙红色长余辉发光； 5在YOX中同时观察到Eu~(2+)和Eu~(3+)的发射，系统研究了基质、添加剂及反应气氛对Eu价态和发光的影响。

12V/24V low voltage power supply, which is used in ground light, is safe and reliable. Inside synchronic digital controller realizes the effects of color changing. Without connecting to outside controller and cords, the synchronic signal trigger function of the inside controller could make lots of ground lights change color at the same time, including flickering, gradual changing, scanning, chasing, running and etc. to satisfy the requirements of lighting in different places. The combination of light and shade draws a colorful city nocturne, breeding a vivid feeling of live and phantasmagoric. LED ground light it novelty lighting and the best choice of city nocturne.

采用低压12V/24V 供电，安全可靠；通过内置同步数码控制器来实现颜色的变化功能，内置控制器具有同步信号触发功能，无需再外接控制器和控制线就能使无数个 LED 埋地灯实现同步变色，包括七彩跳变、七彩渐变、七彩扫描、七彩追逐、七彩跑马等功能以满足不同场所对灯光效果的需求，光与影的结合，勾画出七彩都市迷人的夜景，同时给人一种生动活泼、色彩缤纷、变化无穷的全新感觉、是现代化城市夜景的新颖之作和理想选择。

The light intensity to elicit the male's phototactic response was not significantly different in these three time periods. In terms of action spectrum, both male and females are more sensitive to ultraviolet light than to visible light, especially the spectral region between 330 and 340 nm for the females and 370 nm for the males.

台湾铗蠓成虫对短波长之紫外光激较敏感：雌成虫之最敏感波长为330~340nm，而雄成虫为370 nm，显示雌、雄虫皆较偏好紫外光，但有同的偏好波长。

According to the invention the second light element is formed as a separate LED module with a fitting and a second lamp cap whereby the first and the second light elements are removably attached via the fitting and the second lamp cap, the fitting and second lamp cap providing electrical and mechanical connection between both light elements.

根据本发明，第二光元件被形成为具有配件和第二灯帽的分开的LED组件，由此第一和第二光元件通过该配件和第二灯帽被可移动地附着，该配件和第二灯帽提供两个光元件之间的电气和机械连接。

Then Rb cooling light, K cooling light and K repump light are injected into a semiconductor tapered amplifier in a master oscillator-power configuration.

该装置可同时产生冷却^40K-^87Rb原子的冷却光和再抽运光，结构紧凑、工作稳定。

The stabilities of the extract from sanguisorba under different pH, light, heat, ultraviolet ray, oxidant, reducing agent and additive agents were studied. It was indicated the products could widely used in the condition of weak acid or neutral, while they were not stable to heat and light, so they should be used without light and at low temperature. The products had a strong ability to withstand ultraviolet ray. They could easily be oxidized and degraded by oxidant while they were not easily affected by reducing agent and were almost not affected by additive agents. The extract from the stem of sanguisorba was analyzed by UV and FTIR, showing that the structures of the active components were not changed during ultrasonic wave extracting.

研究了pH值、光、热、紫外线、氧化剂、还原剂以及添加剂对地榆提取物稳定性的影响，结果表明地榆提取物适合弱酸或中性条件下使用，使用范围比较广；但对光热稳定性较差，适合在避光低温的环境；具有很强的抗紫外线能力；氧化剂对地榆提取物稳定性影响较大，会加速其降解，还原剂对地榆提取物影响不大；其他添加剂对其稳定性几乎没有影响；并通过UV和FTIR光谱分析，超声波浸提没有对地榆根茎中有效成分的结构发生改变。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。