Room-temperature 1.54 μm photoluminescence (PL) is observed from Er-doped Si-rich SiO2 (SiO2:Si:Er) films deposited by using the magnetron sputtering technique
进展 洋葱表皮可制作人造肌肉 洋葱的表皮,也就是体表下薄脆、轻薄、半透明的那层膜,是由短而结实的细胞紧致地排列在晶格中形成。中国台湾大学的研究人员发现洋葱的表皮细胞可以用来制作人造肌肉,并随着加载电压的不同而伸展收缩并向不同的方向弯曲。完成一些复杂有难度的动作,如在弯曲的同时可以更为灵活的伸展或者收缩。 探索 南极永久冰层下惊现神秘鱼类 来自美国内布拉斯加大学林肯分校的科学家们在南极厚达
高考1977,我下乡在庄河赶牛车,让我做10遍梦我也不敢想今天的老百姓可以坐着飞机游天下。那个时候,爸爸为了我考试的事打一个长途电话来,我走七里山路到公社去接,而今天手里
The propagators of quantum chaotic systems in configuration space are calculated semiclassically. For the strongly chaotic system whose phase space is torus, su
During the Editorial Board Meeting in Qingdao,China,on June 30,2015,it was decided to launch a series of special issues on important topics of current interests
We propose a scheme for realizing the long-term continuous output of an atom laser. In this scheme the cold atoms in several subsidiary Bose-Einstein condensate
A new computer model of viscous fingering (VF) in a porous medium is presented. The simulation results show that the VF patte is in agreement with the experimen
一、马铃薯种薯生产加拿大的马铃薯种植总面积为200万亩,占各作物总播种面积的20%。全国平均亩产约2000公斤,比全世界马铃薯单产高2倍,比我国高约140%。全国区域化和供生产
A theoretical analysis is presented for a channel drop tunnelling structure composed of a horizontal input channel, a vertical output channel and a multi-mode c
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