Strong convergence theorem for relatively nonexpansive mapping and inverse-strongly-monotone mapping in a Banach space

In this paper, we introduce an iterative sequence for finding a common element of the set of fixed points of a relatively nonexpansive mapping and the set of solutions of the variational inequality for an inverse-strongly-monotone mapping in a Banach space. Then, we show that the sequence converges strongly to a common element of the two sets. Our results improve and extend the corresponding results reported by many others.     

A method of estimating initial conditions of coupled maplattices based on time-varying symbolic dynamics

A novel computationally efficient algorithm in terms of the time-varying symbolic dynamic method is proposed to estimate the unknown initial conditions of coupled map lattices (CMLs). The presented method combines symbolic dynamics with time-varying control parameters to develop a time-varying scheme for estimating the initial condition of multi-dimensional spatiotemporal chaotic signals. The performances of the presented time-varying estimator in both noiseless and noisy environments are analysed and compared with the common time-invariant estimator. Simulations are carried out and the obtained results show that the proposed method provides an efficient estimation of the initial condition of each lattice in the coupled system. The algorithm cannot yield an asymptotically unbiased estimation due to the effect of the coupling term, but the estimation with the time-varying algorithm is closer to the Cramer--Rao lower bound (CRLB) than that with the time-invariant estimation method, especially at high signal-to-noise ratios (SNRs).     

Compound diffractive telescope system: design, straylight analysis, and optical test

The compound diffractive telescope is a novel space optical system which combines the structure of compound eyes with diffractive optics and so it has a lighter weight, a wider field of view (FOV), a lower cost as well as looser fabrication tolerance. In this paper, the design of a compound diffractive telescope composed of one primary lens and twenty-one eyepieces is introduced. Then the influence of diffraction orders on the performance of the system is analysed. A modified phase function model of diffractive optics is proposed to analyse the modulation transfer function (MTF) curves for 0℃ FOV, which provides a more accurate prediction of the performance of the system. In addition, an optimized mechanism is also proposed to suppress stray light. The star image and resolution tests show that the system can achieve diffraction limit imaging within ± 2℃ of FOV and ±4~mm of eccentricity. Finally, a series of pictures of an object are taken from different channels, and the splicing of pictures from adjacent FOVs is demonstrated. In summary, the designed system has been proved to have great potential applications.     

一种发红光的电子陷获型红外上转换材料的制备

本文研制的电子陷获（ＥＴ）型红外上转换材料是在改进传统工艺的基础上，使用硫化助熔法，在石英反应管中，基质合成和掺杂一次完成，具有工艺简单、生长周期短、重复性好的优点。由于反应在密闭系统中完成，安全可靠，对实验室环境保护好，用这种方法制备出的红外上转换材料，在室温下用紫外光或可见光激励后，用红外激发时发红光，并测得了其激发光谱（红外）和发射光谱（红光）。     

Configurations, Electronic Structure and Magnetic Ordering of Small Manganese Clusters

We investigate the configurations, electronic structures, and magnetic ordering of MnN （N = 2-13） clusters based on all-electron density functional theory. The Jahn-Teller effect plays an important role in determining the ground state of certain geometries. The magnetic ordering of the MnN dusters transits from ferromagnetic ordering for the smallest （ N = 2, 3） dusters to a near degeneracy state including ferromagnetic and ferrimagnetic ordering in the vicinity of N = 4-6 and to a clear ferrimagnetic ordering at N = 7 or beyond. N = 6 and 10 are the magic numbers for neutrai MnN （N = 2-13） dusters.     

Hilbert空间中关于广义平衡问题与不动点问题公共解的收敛定理

本文在Hilbert空间中引进了一迭代方法来逼近两个集合的公共元素,这两个集合分别是一类广义平衡问题的解集和两个渐近非扩张映射公共不动点集.得到一强收敛定理,所得结果提高和推广了许多作者的相应结果.     

随机进入教学在设计性物理实验教学中的应用

以＂温度传感器特性研究＂为教学案例,运用建构主义中的随机进人教学法优化设计性物理实验教学。实践表明,随机进入教学法的引入可以有效提高学生的独立学习能力、创新能力和实践能力。     

激光剥蚀-电感耦合等离子体质谱法测定多晶硅中杂质元素

采用激光剥蚀固体进样技术结合电感耦合等离子体质谱法测定了多晶硅中的元素B、Cu和Zn。考察了该三种杂质元素在多晶硅样品不同深度层面和同一深度层面的分布情况;尝试了采用硅基体信号归一化的方法计算了测定元素的含量。结果表明,杂质元素B、Cu和Zn在多晶硅材料中分布均匀,且测定结果与辉光放电质谱法的测定结果相吻合。这一方法可用于判别多晶硅表面的污染情况,以及杂质元素在多晶硅材料内部分布的均匀性。     

GDMS法和ICP-MS法测定太阳能级多晶硅中杂质元素含量

采用辉光放电质谱法(GD-MS)测定太阳能级多晶硅中B,P,Fe,Co,Ni,Cu,Zn等痕量杂质元素,并优化和选择了GD-MS工作参数。考察了在半定量分析的情况下,GD-MS测定痕量杂质的精密度。结果表明,GD-MS对B,P,Na,Al,K,Ca,Fe,Ni,Cu,Co,Zn等元素测定结果的RSD都小于30%。用ICP-MS法进行验证,检出限0.14~2.85 ng/mL,RSD为1.6%~12%,加标回收率85.2%~125%。     

高效液相色谱法同时测定蜜饯中的16种食品添加剂

建立了同时检测蜜饯中16种食品添加剂(安赛蜜、糖精钠、苯甲酸、山梨酸、脱氢乙酸、新红、诱惑红、柠檬黄、苋菜红、胭脂红、日落黄、亮蓝、赤藓红、对羟基苯甲酸甲酯、对羟基苯甲酸乙酯、对羟基苯甲酸丙酯)含量的高效液相色谱法.选用Athena C18-wp色谱柱(4.6 mm×250 mm,5 μm),以0.02mol/L乙酸铵...