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One of the most interesting directions in quantum simulations with ultracold atoms is the expansion of our capability to......
Matrix computation, as a fundamental building block of information processing in science and technology, contributes mos......
At the Socialist School， a secondary school for girls， teachers have swept classrooms， lined up broken desks， yanked down po......
The design of large-scale,high-numerical-aperture,and broadband achromatism is a big challenge in metalens research. In ......
基督教徒每年12月25日都过圣诞节,庆祝基督耶稣的诞生。在这一天,许多人相互交换礼物,并用冬青枝、槲寄生枝、圣诞树等把家里装饰......
黄河是中华文明的摇篮。黄河岸边这片土地上的风土人情是如此质朴而又珍贵。
The Yellow River is the cradle of Chinese civili......
Traveling to Beijing for the first time? Don’t get caught in, out, or up by cultural shocks. Know how things should - a......
Las Vegas,in the western state of Nevada,is one of the most popular tourist destinations in America and the world.It att......
On New Year’s Eve,our class had a party.The atmosphere was good.It was out of the ordinary from the very begining.The b......
初到国外某地,必须学会问路,首先要学会怎么开口。为了表示礼貌,开口时首先要说Excuse me。例如:Excuse me,where exactly is the ......
松阳寨头村是高山上的自然村,从明清年代就开始有人进山落户。起初进来的都是一些外地人,家乡受难,逃出家门来深山老林谋生的。他......
在整个初中英语学习中,表示“许多”的词和词组已在课本、练习中多次循环出现,同学们不太容易区分掌握,尤其是在同时出现的情况下......
In the new energy vehicle fields,under the spot lights are mostly passenger cars,and the commercial vehicles are nearly ......
The first time I entered the restaurant Green, inside the five-star Radegast Lake View Hotel in Chongwen District of Bei......
Three alkaline earth metal-organic frameworks based on fluorene-containing carboxylates:syntheses,st
Three metal-organic frameworks,{[Mg_2(MFDA)_2(DMF)_3]·0.5H_2O}_n(1),{[Ca(MFDA)(DMF)(H_2O)]·0.5DMF}_n(2)and[Ca(MFDA)(DM......
Photoluminescence properties of an orange-red LaSr_2AlO_5:Sm~(3+) phosphor prepared by the Pechini-t
LaSr2AlO5:Sm3+ phosphors were synthesized by the Pechini-type sol-gel process. The X-ray diffraction pattern revealed th......
Almost one in every three pedestrians 2 crossing the road are using their mobile phone,a US study suggests.Of more than ......
For the ancient Romans,a red flag was a signal1 for battle. Because of its visibility2,stop signs,stoplights,brake light......
交通堵塞是现代城市生活中的一个严重问题。交通指示灯虽然在规范交通秩序方面起了很大作用,但很明显有它的不足之处:试想,在空无......
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Balanced regional development is essential to China’s economic stability and efficiency and achievement of the goal to ......
Who are the shining lights behind the national flags taking football’sgreatest stage?Which are the key players whose g......
White light-emitting diodes (WLEDs) have matched the emission efficiency of florescent lights and will rapidly spread as......
Deaf-mute Jiang Xintian lights a small cauldron in the hands of wheelchairbound fencer Jin Jing at the Paralympic Flame ......
The U.S.Olympians land in Beijing to start their pre-Games training at Beijing Normal University All the lights were on ......
New biphasic C-type horizontal cells were identified physiologically and morphologically in the ret-ina of live immobil......
Visible light wavelength division multiplexing (VWDM) experiment was performed using polymer opticalfiber (POF). Lights ......
1.HANDOVER A Greek high priestess lights a cauldron at the Panathenian Stadium in Athens on March 30 when the Olympic fl......
The modes competition characteristics in birefringence cavity laser are studied in different regions of the gain curve. ......
一辆全新的国产梅赛德斯-奔驰E230轿车,在声光电交融的环场音效中,在升腾而起的金色烟雾中,从舞台上洞开的“中网”之门中徐徐驰来......
A dual-wavelength erbium doped fiber laser with a tilted fiber Bragg grating and photonic crystal fiber is proposed and ......
Shockwave generated in single step target by KrF laser direct-drive. As the lights signal delay caused by different tran......
A high-bandwidth,high-sensitivity fully differential optoelectronic integrated receiver is implemented in a chartered 3.......
Atom waveguide and 1D optical lattice using a two-color evanescent light field around an optical mic
We propose a two-color scheme of atom waveguides and one-dimensional(1D)optical lattices using evanes- cent wave fields ......
Analytical solution of microwave transition spectral lines for ~(87)Rb atoms in a Hanle configuratio
This paper theoretically investigates the microwave transition spectrum of 87 Rb atomic D1 line with specially prepared ......
一、确认音响效果(1)can you[people]hear me?您[大家]能听到我(的话)吗?(2)It you can hear me in the rear of (?)e room,would......
Two foundational factors (escape cone and transmissivity) about light extraction of light emitting diodes (LEDs) are dis......
The effect of Al doping on the J-V characteristics sol-gel derived of ZnO/p-Si photodiodes was investigated.The resistiv......
Mulan the Musical returns to New York with more flash and grandeur and a heavy dose of girl powerAs a growing gallop of ......
To cope with the current difficult financial situation worldwide,most of the compa-nies plan to cut down their cost sig......
Light-extraction efficiency and forward voltage in GaN-based light-emitting diodes with different pa
We present a new method of making a textured V-pit surface for improving the light extraction efficiency in GaN-based li......
Visible light communication between light emitting diode(LED)traffic lights and vehicles with a receiving photodiode fro......
交通、船舰、机场等应用领域的信号灯、探照灯容易受到天气因素的影响,本文通过实验比较了不同颜色LED光源在淡水雾和海雾中的穿透......
Beijing’s smog is getting worse than ever.In October,it was said to be too smoggy for even traffic surveillance cameras......
