Optimizing Design of Breakdown Voltage to Eliminate Back Gate Bias Effect in Silicon-on-Insulator Diode Using Low Doping Buried Layer

This work presents the optimal design of a silicon-on-insulator （SOI） diode structure to eliminate the back gate bias effect and to improve breakdown voltage. The SOI structure is characterized by inserting a silicon low doping buried layer （LDBL） between the silicon layer and the buried oxide layer. The LDBL thickness is a key parameter that affects the strong inversion condition of the back MOS capacitor of the new SOI diode. The optimal LDBL thickness in the SOI diode is 2.65μm.The LDBL shielding layer improved the breakdown voltage.     

一种新的运动模糊图像超分辨力盲复原算法

研究了具有深度运动模糊效果的图像的复原算法.采用对运动模糊图像的傅里叶频谱进行Radon变换来估计运动模糊方向,在此方向上计算运动模糊图像的自相关来估计运动模糊长度,再以运动模糊方向和运动模糊长度为参量结合超分辨力图像复原处理算法对比较严重的运动模糊图像进行复原.结果表明,该综合性算法能够较为精确地估算出运动模糊图像的模糊参量并取得较好的复原效果.     

Co金属有机骨架模板制备NiCo水滑石/泡沫镍复合材料及电容性能

通过两步法先在泡沫镍(nickel foam,NF)上原位生长Co金属有机骨架(Co metal-organic framework,Co-MOF)纳米片阵列,再浸入不同浓度Ni²⁺离子溶液刻蚀Co-MOF纳米片,在NF表面得到NiCo水滑石(NiCo layered double hydroxide,NiCo-LDH)。NiCo-LDH/NF继承了Co-MOF纳米片结构形成一级纳米片阵列,并在一级纳米片表面形成次级纳米片褶皱。在2 mmol Ni(NO₃)₂·6H₂O溶液中刻蚀得到的NiCo-LDH/NF表现出高容量、高倍率性能,在电流密度为5 mA·cm^-2时比电容为7 764.5 mF·cm^-2,电流密度为20 mA·cm^-2时比电容为6 098.2 mF·cm^-2,容量保持率为78.5%,在20 A·g^-1电流密度下经过5 000次长循环后,容量保持率为85.9%。与活性炭组装的混合...     

固相萃取膜技术用于自来水中丙烯酰胺的测定

开发了一种简便快速的固相萃取膜(SPE disk)技术,实现了对500 mL自来水中微量丙烯酰胺的富集,采用高效液相色谱法(HPLC)完成其定性和定量测定。比较不同填料的吸附情况,选择活性炭作为丙烯酰胺的最佳吸附剂。考察了洗脱剂种类、洗脱剂体积、洗脱速率和穿透体积等条件对萃取结果的影响,优化了色谱分离条件。经膜萃取过的丙烯酰胺在0.05～0.5 mg/L质量浓度范围内,其峰面积与质量浓度的线性关系良好,相关系数为0.998,检出限为20 ng/L。该方法对不同体积、不同浓度的丙烯酰胺溶液的回收率为94.12%～100.2%,相对标准偏差为2.09%～4.51%(n=3),自来水样品的加标回收率为79.96%。该方法操作简单、快速、灵敏度高,适合对水样中丙烯酰胺的测定。     

高温高压下翡翠宝石的人工合成

 本文通过1 350～1 550 ℃高温灼烧得到了具有翡翠成份的玻璃，在压力2.0～4.5 GPa、温度900～1 450 ℃下完成了翡翠由非晶态到晶态的转变，合成出Φ8×3 mm的翡翠。通过适量的Cr、Cu、Co等离子掺杂染色，得到了翠绿色、朱红色和蓝色的翡翠。本文还研究了压力和温度对翡翠合成的影响。     

鲇鱼和斜带石斑鱼核糖体蛋白L15完整cDNA的克隆和序列分析

通过RT—PCR和3′RACE方法,分别从鲇鱼(Sitlurus asotus)和斜带石斑鱼(Epine phelus coioides)中克隆了核糖体大亚基蛋白L15(ribosomal protein L15,RPL15)的完整cDNA,并详细分析了其序列特征．这两种鱼的RPL15蛋白cDNA均包含一个615个核苷酸的完整阅读框,推测分别编码一个204个氨基酸的蛋白．不论是核苷酸序列还是推测的氨基酸序列,这2个序列分别与同属的南方大口鲇和同科的大眼鳜rpl15序列同源性最高,与其他已知的脊椎动物rpl15序列也有较高的同源性．基于这2个序列的编码区和其他鱼类的rpl15编码序列进行分子系统学分析,与传统的形态分类结果是一致的．     

Pulse Evolution Characteristics in Self-Similar Mode-locked Fibre Laser

A self-similar mode locked fibre laser is studied based on a numerical model. By introducing a dimensionless factor k to characterize the pulse shape, the self-similar pulse evolution, formation and the temporal and spectral shape changes due to the elements in the cavity are investigated throughout the laser cavity. The results show that in the self-similar mode locked fibre laser, self-similar pulse is first formed in the single-mode fibre, which is then amplified in the gain fibre. Gain bandwidth has a small influence on pulse shape, so high energy self-similar pulse can be obtained after amplification. Because net cavity dispersion directly influences the pulse width as well as peak power after compression by a pair of gratings, which can determine the pulse self-similar evolution, it is very important to control the net cavity dispersion to a certain range to obtain self-similar pulses.