摘要：大气背景辐射强弱决定了红外望远镜系统极限灵敏度,直接影响系统设计,背景辐射也是反映天文台站观测性能优劣与否的一项重要指标。实测了国内的阿里天文台、德令哈观测站、怀柔观测站等几个典型天文台站大气红外背景辐射,尤其是获得了阿里天文台大气红外背景辐射的一手资料。实测结果表明:阿里天文台大气红外背景辐射的强弱以及辐亮度均值的昼夜变化在几个台站中均最小,其最大辐亮度均值为1.30×10^-6W·cm^-2·sr^-1,辐亮度均值的最大昼夜变化仅为18%,其红外背景辐射限最优;其次是德令哈观测站。将扫天实测辐亮度与MODTRAN模拟辐亮度进行对比,发现对于国内如阿里等青藏高原高海拔地区无论是标准大气模式还是实际大气模式其模拟结果与实测间皆存在较大差异。

摘要：为研究大气背景辐射和仪器辐射规律、控制仪器热辐射和仪器精度,设计了一套大气背景辐射测量系统。分析了测量系统各组件和辐射定标等各类误差源对总测量误差的影响,还分析了定标精度的影响因素,确定了测量工作的改进方向。结果表明:该系统在定标区间内的测量误差主要是定标误差和随机误差,两者分别为2.4719%和0.0790%;合成误差为2.4732%。当用该系统测量大气背景辐射时,对大多数优良的天文台站而言,大气辐射强度远低于定标时的辐射强度,因此需进行外推测量。对外推测量误差的估计结果表明,外推测量可能导致较大的测量误差。为提高大气背景辐射测量精度,更低辐射强度的标准辐射源不可或缺。研制了大气背景辐射测量系统,并进行了野外实测等工作,这为大口径红外天文望远镜系统的研制并将其实际应用于红外天文观测提供了基础。

摘要：[Objective] The aim of this article is to establish a cell suspension culture system for eggplant. [Method] Using orthogonal design, appropriate media were screened for callus induction, subculture and cell suspension culture. [Result] The appropriate medium for callus induction was MS supplemented with 0.2 mg/L 6-BA and 0.2 mg/L NAA; the appropriate subculture medium was MS supplemented with0.2 mg/L 6-BA, 0.2 mg/L NAA, and 0.1 mg/L KT; the suitable medium for cell suspension culture was liquid MS medium supplemented with 0.4 mg/L NAA and 0.2mg/L. Cell growth curve was similar to ＂S＂ shape in the above suspension *** cell growth included four phases, the initial phase（1-3 d）, the logarithmic phase（3-7 d）, the steady phase（7-8 d）, and the decline phase（8-11 d）. With the increasing culture time, the number of suspension cells increased, and it reached the maximum value at the 7thd, about 3.8 ×105cells/ml. Then the number of cells began to decline rapidly. The cell vigor was the highest at the initial phase. Suspension cells grew best in the liquid MS medium supplemented with NAA（0.4 mg/L）and 6-BA（0.2 mg/L）. The mitotic index reached the maximum, about 4.1% in the above medium, which suggested that this medium was suitable for cell suspension culture of eggplant. [Conclusion] Cell suspension culture system of eggplant provides a significant method for eggplant biotechnology. Genetic transformation and mutants screening can be carried out with this system.