为实现空间红外望远镜的高分辨率探测,基于Schupmann消色差理论,开展了大口径折反式中波红外衍射望远镜系统的设计及消热差模型研究。设计了口径1 m、F数为2、全视场0.12°、波段3.8μm~4.2μm的折反式中波红外衍射望远镜系统,其主镜及校正镜均为平面衍射透镜,中继系统采用卡塞格林折反式结构,再聚焦及三次成像系统均为折射式结构,对系统进行了公差、鬼像及冷反射分析。设计结果表明:在-20℃~60℃温度下,系统的MTF在16.7 lp/mm范围内均大于0.7,接近衍射极限,且具有100%冷屏效率,公差
海水中六价铬使用二苯碳酰二肼分光光度法分析过程中,易受样品的色度、氧化还原物质等干扰影响,且分光光度法最低检出限为0.004 mg/L,与《海水水质标准》(GB3097-1997)中六价
Parkinson's disease(PD)is one of the most common neurogenerative diseases(NDDs),characterized as less neurotransmitter release and loss of dopaminergic(DAergic
We examine the reflection and transmission phenomena of quasi-longitudinal plane(QP)waves in an AlN-ZnO laminated composite structure.The structure is designed under the influence of the initial stresses in which one carrier piezoelectric semiconductor(PS
通过调控薄膜的沉积条件,探索La2CuO4的晶体结构对电化学性质的影响.采用脉冲激光沉积设备在YSZ(100)单晶基底上沉积一系列La2CuO4薄膜,通过调节沉积时的氧压,制备了不同晶体
It is of great significance to develop rapid crosslinking strategies to enrich the functions of hydrogels and simplify the preparation process of hydrogels.
Commiphoroids G1-G3,H and I(1-5),five new terpenoid dimers were isolated from Resina Commiphora.Their structures and ab-solute configurations were determined by
采用气相色谱-串联质谱法(GC-MS/MS),建立了螺旋霉素原料药中N-亚硝基二甲胺(NDMA)含量的检测方法.样品的制备使用液液萃取法,先将螺旋霉素溶于硫酸溶液,再用二氯甲烷萃取得
Due to the conflict between equilibrium and constitutive requirements,Eringen’s strain-driven nonlocal integral model is not applicable to nanostructures of engineering interest.As an alternative,the stress-driven model has been recently developed.In this
Cu-based metal organic frameworks(MOFs)are regarded as promising sensing materials,which have abundant metal sites,large sur-face area and simple synthesis proc