Effect of 1070 nm laser intensity on parameters of In_(0.3)Ga_(0.7)As solar cell

The photoelectric properties of In_(0.3)Ga_(0.7) As solar cells applied in laser wireless power transmission(LWPT) were studied when they were irradiated by 1070 nm continuous wave(CW) laser of various intensities. The influences of laser intensity on solar cell parameters extracted by the pollination algorithm were analyzed quantitatively.Results show that the conversion efficiency of the cell rose to the maximum and then decreased rapidly in the laser intensity range of 50–900 mW/cm2. With higher energy laser irradiation, the rise of ideality factor and reverse saturation current would lead to the degradation of voltage at the maximum power point, which was the main reason for the decrease of conversion efficiency. The results provide the basis for choosing the appropriate input energy in the case of different transmission systems.     

马尔可夫过程H-值可加泛函的向前向后鞅分解

本文研究了马尔可夫H-值可加泛函的向前向后鞅分解.利用Lyons-Meyer-Zheng鞅分解得到了泛函数极限定理所必需的极大不等式和紧性结果,在最小条件限度内得到了马尔可夫过程经验测度的泛函中心极限定理,将该定理从实值情形推广到了希尔伯特值情形.     

胶体金免疫层析法对组织样品中磺胺甲噁唑残留的快速检测

研究了用于快速检测组织样品中磺胺甲噁唑残留的胶体金免疫层析检测试剂.采用免疫竞争法,将抗磺胺甲噁唑多克隆抗体-胶体金复合物包被在胶体金结合垫上,同时将人工合成的磺胺甲噁唑抗原包被在硝酸纤维素薄膜表面作为检测线(T线),将抗磺胺甲噁唑多克隆抗体的羊抗兔二抗包被在硝酸纤维素薄膜表面作为质控线(C线).T线的人工抗原与待测样品中的磺胺甲噁唑竞争结合胶体金标记的磺胺甲噁唑多克隆抗体,通过T线与C线的显色对比读出结果.采用该检测试剂检测组织试样时,定量下限可达20 μg/L,整个检测过程只需3 ～5 min,且与磺胺嘧啶、磺胺二甲基嘧啶、盐酸克伦特罗、四环素、青霉素、链霉素无交叉反应.检测试剂具有较高的灵敏度及特异性,操作便捷,稳定可靠,可作为组织中磺胺甲噁唑残留现场监控的有效筛检手段.     

利用PVDF传感器检测激光超声的实验研究

简要介绍了激光超声技术以及声表面波的基本特点、激光超声产生和接收的基本原理及激光超声技术的应用。概述了聚偏二氟乙烯（PVDF）压电薄膜材料的结构、性质和应用，以及薄膜压电性产生的机理。对PVDF换能器的设计思路和实验方法进行了简单讨论。具体实验采用脉冲激光器激发声表面波，利用PVDF传感器接收实验信号，调试实验信号，得出波形，并对实验现象作出初步分析。证实了该实验装置应用于激光超声无损检测的可行性与可靠性。     

学而不思则罔——谈"反思"在物理学习中的重要性

1问题提出 “学而不思则罔”这是古训，“反思”亦是当下新课程提得比较多的一个教学理念。目前，教学中对反思认识，大多认为“反思”的主体是教师，即教师反思自己的教学设计和活动的全过程。笔者并不太赞同这种观点，笔者认为教学的主体是学生，反思应该是学生思维能力的强作用过程，当然教师的“反思”也是重要的，     

407 nm 光诱导的红细胞荧光光谱随浓度增加红移的机理分析

用407nm光激发不同浓度离体红细胞可以产生较强的荧光光谱,进一步研究发现这些荧光光谱中存在两个明显的、频谱宽度大致相等的荧光发射区,而且在生理盐水中随着红细胞浓度的增加,其发射的荧光光谱的谱峰值位置向长波方向移动,即出现“红移”现象.从理论上对这种“红移”现象的产生机理进行了分析,表明这种现象是由于浓度变化对荧光团电子能级产生的微扰发生变化所致.该研究结果对现代医学中的荧光光谱诊断技术和低功率激光照射疗法都有一定的参考价值.     

随机集的极限性质

本文研究了Banach空间随机紧集的极限性质.利用嵌入定理,得到了Banach中独立同分布随机紧集的Minkowski和的中偏差原理.     

Analyzing of LED-induced Blood Fluorescent Spectra

The visible fluorescence spectra of healthy mice blood cells have been measured by light emitting diode (LED) excitation at about 570 nm (Δλ1/2≈32 nm ) in vitro. It is found that the spectral profiles of mouse blood, erythrocyte and hemoglobin are similar. The physical mechanism for LED-induced blood cells fluorescence spectra is analyzed. The development of low intensity laser or light irradiating blood therapy in vivo and in vitro may be guided by the understanding of blood fluorescence characteristics.     

Mechanism of Spatiotemporal Distribution of Laser Ablated Materials

Interaction between subsequent laser and ablated materials in laser processing changes the laser spatiotemporal distribution and has influences on the efficiency and quality of laser processing. The theoretical and experimental researches on transportation behaviour of ablated materials are provided. It is shown that the velocity distribution of ablated materials is determined by ablation mechanism. The transportation behaviour of ablated materials is controlled by diffusion mechanism and light field force during laser pulse duration while it is only determined by diffusion mechanism when the laser pulse terminates. In addition, the spatiotemporal distribution of ablated materials is presented.     

窥一斑可得全豹——由一道习题带动整个运动学规律复习

匀变速直线运动规律这一章对于刚刚步入高中学段的新生而言,感觉概念多、公式杂、习题藏头缩尾,那么如何帮助学生有效内化知识,并顺利用于分析实际问题呢？借助具体的习题能够带动运动学物理概念和物理思想的复习是教学中常用的手段,不过却往往容易掉人题海战术的误区,笔者认为复习课不能设计为习题的简单累加,选择一道好的例题,能够有效帮助学生组织概念和方法的复习,达到“窥一斑可得全豹”的境界。