混沌群作用

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蚊蝇杀灭器及其发射光谱分析

文章首先介绍了蚊蝇杀灭器在佛山市两个单位的职工饭堂厨房和会议室或值班室的试验情况。然后围绕文中四个图说明了下面四个问题：一，展示了进行光谱分析的测量装置。二，将蚊蝇杀灭器黑光灯的发射光谱和日用荧光灯发射光谱作分析比较。三，指出黑光灯也是一种荧光灯，说明了它的发光机理。四，展示了国外一种高效黑光灯的发射光谱，它是用活性铈钙磷酸脂做荧光涂料，我们进一步深入探讨了这种黑光灯的发光机制，并介绍了它的其他用     

带有积分边值条件的分数阶微分包含解的存在性

本文利用Hausdorff非紧测度、分数阶的微积分理论和Kakutani不动点定理,研究了满足条件z(0)=z0,z(1)=λcI0+γ+z(η)=λ∫0η(η-s)γ-1/Γ(γ)z(s)ds的广义Bagley-Torvik型分数阶微分包含cDv1 z(t)-ac Dv2 Z(t)∈F(t,z(t)),t∈(0,1)解的存在性.其中1 0,a和λ是给定的常数.     

A block-by-block method for the impulsive fractional ordinary differential equations

In this paper, a block-by-block numerical method is constructed for the impulsive fractional ordinary differential equations (IFODEs). Firstly, the stability and convergence analysis of the scheme are established. Secondly, the numerical solution which converges to the exact solution with order $3+\gamma$ for $0<\gamma<1$ is proved, where $\gamma$ is the order of the fractional derivative. Finally, a series of numerical examples are carried out to verify the correctness of the theoretical analysis.     

Periodic points of solvable group actions on 1-arcwise connected continua

It is shown that every continuous action of a solvable group on a 1-arcwise connected continuum must have a fixed point or have a 2-periodic point.     

FAIR项目Super-FRS超导二极磁铁测试线圈的三维失超数值模拟

国际反质子与离子研究装置(FAIR)项目中的Super-FRS超导二极磁铁是一个大型温铁结构的超导磁体,由中国负责设计、研制和测试。为了研究超导线圈的性能和其设计的可靠性,前期研制了一个测试线圈。建立了一个基于ANSYS和OPERA 3D的三维失超模型,不仅将模拟结果和实验数据进行对比,更可以获得失超过程的更多细节。模型将环氧浸渍的超导线圈简化为各项异性连续介质。将ANSYS求解器用于瞬态传热过程的分析,OPERA 3D用于磁场计算,并采用ANSYS脚本语言（APDL）进行焦耳热的计算和保护电路方程的求解。模拟得到了温度、电压、电流随时间的变化曲线和失超传播过程。最后将模拟结果和测试线圈的测试结果进行了比较。     

Electron-donating methoxy group enhances the stability and efficiency of indole-based fluorescent probe for detecting Cu2+

Research on Chemical Intermediates - Two novel Schiff-base fluorescent probes bearing different substituents were synthesized by the reaction of indole derivatives with 4-aminoantipyrine. The...     

Thermal analysis of beamline heat load components due to increased power delivery from EAST neutral beam injector

Journal of Thermal Analysis and Calorimetry - According to EAST’s experimental plan, the long-pulse and high-power operation of neutral beam injector is the requirement for EAST. In this...