查询词典 light-pipe

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 catalytic cracking of NNJ 150 over USHY, HZSM 5 and SAPO 34 catalysts presented as that the selectivity of light olefins over USHY was the lightest among the three calalysts with a quicker deactivation, while HZSM 5 showed a longer catalyst life and lower selectivity of light olefins, for SAPO 34, both the conversion and the selectivity of light olefins were the lowest.

实现吸热型碳氢燃料这种功能的关键之一是选择适当的化学反应。由于碳氢燃料的裂化是吸热反应，而催化裂化与热裂化相比，能降低反应的温度，因此催化裂化是实现吸热型碳氢燃料功能较好的途径之一。由热力学可知，燃料裂化生成乙烯、丙

Blue light and red light can promote the opening of stomata,while the green light can close stomata.

蓝光和红光能促进气孔的开张，而绿光能够逆转这种作用。

Chromatic plastic film and light conversion film has been applied in protected cultivation, and plastic films with different light quality may serve as a non-chemical approach regulating growth and thermoperiodic responses of plants. A few studies showed that light quality affected growth and yield of strawberry, but little is known about its effects on photosynthesis and chlorophyll fluorescence in strawberry leaves, and fruit quality. So it is beneficial to scientific regulating growth and fruiting for strawberry protected cultivation to study on those effects and the interactions between CO2 and N supply on photosynthesis.

而低氮影响植株生长、叶片黄化，进而影响光合作用，导致抗性减弱和产量品质下降；③CO_2供应问题：目前我国草莓栽培常在设施环境下进行，在封闭性强的设施中空气流通不畅，常导致设施内部CO_2供应不足而影响光合作用，进而影响产量和品质；④光不足与光质问题：设施栽培中，光通过玻璃和塑料棚膜后使设施内的光强与光质均发生改变，这些变化特别是光质变化对草莓生长与结果的影响程度尚无明确认识。

Look downward on that Globe whose hither side With light from hence, though but reflected, shines; That place is Earth the seat of Man, that light His day, which else as th' other Hemisphere [ 725 ] Night would invade, but there the neighbouring Moon (So call that opposite fair Starr) her aide Timely interposes, and her monthly round Still ending, still renewing through mid Heav'n, With borrowd light her countenance triform [ 730 ] Hence fills and empties to enlighten th' Earth, And in her pale dominion checks the night.

你往底下看那个球吧，它的这半边只是反射，是从这里照过去的光。那就是人所住的地球，光的是昼，相反的暗的半球是夜。他的邻近就是地球对面那美丽星球，名字叫月亮，定时帮助他，在半空中，每月绕他转一周，循环往复，从这里借去的光照耀着大地，依照盈虚圆缺、嫦娥三相的形式照亮着地球，在她苍白的领域内控制着夜。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。