在阐述离网型光伏发电系统原理及组成的基础上,根据海上渔排所处的地理位置、气候条件和用电负荷计算蓄电池组容量和太阳能电池组件数量,确定了太阳能电池方阵的安装角度,并根据计算结果选择合适的蓄电池、光伏组件、控制器和逆变器,实现离网型光伏发电系统的设计与应用.

基于光热偏转技术,在阶跃光激励下,样品和偏转媒质的一维温度分布和光热偏转信号幅度将随时间和空间发生变化.利用拉普拉斯变换求得其温度分布和信号幅度的表达式,并计算模拟偏转媒质的温度场、温度梯度随时间的变化,以及探测光离样品表面不同距离时的信号变化规律,分析偏转信号幅度随材料热扩散率大小的变化规律.模拟结果表明,光热偏转信号幅值及样品表面空气的温度梯度均随离样品表面的距离增加而变小,信号幅值上升与下降的快慢受样品的热扩散率的影响较大.

为了获取高质量的彩色动态全息,采用计算机编码的方法,提出了一种制彩色动态全息的新方法.根据色度学和采样原理,将任一分动作物点分解为红、绿、蓝三基色物点,计算编码调整三基色物点的位置,使它们对应的含体视对的3张分色全息图放置在同一平面上,经共轭光再现后,所有体视对的再现像能在空间上完全重合,并记录重合像与参考光干涉后的彩色全息图.结果表明,彩色全息图经再现后,随着人眼位置的移动,可见不同的动作像,从而实现彩色动态效果.此方法能有效解决彩色动态全息图再现像难重合、对实验条件要求高的问题;且操作简单易行,能有效避免一些不必要的噪声,在3维显示方面具有较好的应用价值.

根据光束传输的独立性和叠加性原理,利用虚源法计算推导出螺旋马丢高斯光束传输的积分表达式,模拟一种螺旋马丢光束的轴上非傍轴光场分布,得到螺旋马丢高斯光束保留到第三阶的非旁轴修正项,并与傍轴近似结果做对比分析.模拟结果表明,螺旋马丢高斯光束在近距离范围内,非傍轴修正值与傍轴近似值相差较大,但随着传输距离的增加,两者越来越接近.这是通过简单函数叠加来实现对复杂光束研究的方法,在光束传输和光场调制等方面有一定的研究意义.

顶岗实习是高职院校实践教学的重要部分,是学校教育与社会工作的过渡,在人才培养过程中起着非常重要的作用.为了克服目前高职院校顶岗实习管理过程中存在的诸如实时跟踪学生实习情况困难、资料收集困难、实习数据统计分析困难等问题,借助信息化管理手段,运用信息化平台对学生顶岗实习进行全过程管理,有效解决实际问题.

“二元制”教育是传统学徒制与现代学校教育相结合、企业与学校合作实施的职业教育制度,是提高人才培养质量的一种有效途径,有利于零距离对接行业企业用人需求.该文以厦门海洋职业技术学院试点的校企共建“二元制”电子信息工程技术专业为例,探讨了人才培养方案、课程体系、教学方式和考核评价机制等方面的改革措施.

对高职模拟电子技术实训课程"音频功率放大器制作"进行了教学实践探索, 详细论述了实训电路组成及工作原理, 阐述了基于项目驱动的实训课程教学过程, 提出了课程的评价考核方式, 总结了实训中存在的常见问题并提出了相应对策.

Different from the pseudo three-dimensional (3D) visualization of computer tomography (CT)images synthesized by computer softwares,a new technology of 3D visualization of color CT images based on computer generated holography is proposed.A set of color CT images are decomposed into three primary color CT images of red,green and blue,then,the two-dimension information of this set of color CT images is synthesized into 3D information using three computer generated holograms (CGHs)which are saved in a computer.Because all CT images are two-dimension,fast-Fourier-transform algorithm that can greatly speed up the calculation of CGHs is adopted.3D photoelectric display system of color CT images is set up,in which,three CGHs are displayed on three liquid crystal spatial light modulators (LC-SLM) cormected to a computer.Re-illuminating the three CGHs with red,green and blue laser simultaneously,three 3D monochrome CT images of three primary colors are obtained,and a 3D color CT image is gotten by fusing the three 3D monochrome CT images together with X-Cube.A fog screen is used in this system as the 3D display screen for the final 3D color CT image,that not only increases the visual angle,but also enhances the stereoscopic effects of the 3D color CT image.The principle and experimental result are given.

针对分光计调整难度大、耗费时间长等问题,在分析分光计的调节原理和调节难点的基础上,针对通过望远镜目镜能否看到反射的十字叉丝像的三种不同情况,分别探讨了分光计的调节方法和技巧.

Based on the colorimetric principle,a color object can be coded into a red object,a green object and a blue object.So,the color object can be coded into three primary color objects in making color rainbow hologram.The coordinates of three primary color objects can be calculated according to the relationship between the objects and their holograms,then the diffraction wave from three primary color objects in the hologram plane can be calculated,which is interfered through a reference light to form a hologram.After the hologram is shown by SLM and is illuminated by the light with continuous spectrum,three primary color images will superposite in space to form a color image.This method use a equivalent hologram instead of three monochrome holograms,which provide a simple and convenient way to make a high-quality color hologram.

基于色度学原理和全息图的基本物像关系,提出利用等效编码法制作彩色彩虹全息图.首先,将空间坐标确定的彩色物点,编码为三个不同空间坐标的三基色等效物点,它们的空间坐标由全息物像关系确定.在一全息记录面上的不同位置,计算出三基色物点对应的三条线全息图.然后,利用平面共轭光再现三线全息图,在原彩色物点位置能看到完全重合的三分色全息图再现像,重合像与参考光干涉后,获得彩色全息图.经实验验证,此方法有效解决了两步法制彩色全息图时,三分色全息处于同一平面再现时,它们的再现像无法重合的问题.

基于Whittaker-Shannon抽样定理,对计算全息的采样进行了研究,获取适合计算全息图的采样间隔,并研究了菲涅尔全息图采样间隔与全息图尺寸、物点坐标及物点到全息面距离的关系以及傅里叶变换全息中全息面记录点数与物点采样间隔的关系.实验模拟表明此方法采样后的全息图再现像效果较好,且有利于减少全息图的信息存储量和提高全息图的计算速度.

In order to improve the color effect and the visual angle of hologram,based on the method of mirror images,a new technique is proposed to obtain a real color hologram with a large viewing angle by the combination of computer-generated hologram and optical hologram.There are two steps to realize the method:Firstly,computer-generated hologram H1r,H1g,H1bis yielded with three image objects.Secondly,a rainbow hologram H2is generated by optical ways.In terms of the reversibility of light path principle,an image with a wide viewing angle is reconstructed by reversing the reconstructed wave.The technique achieves a color reconstruction image with a wide viewing angle of 14°.The color effect and the stereoscopic effect of the reconstruction image is increased.

Based on the principle of the photothermal deflection technique,the experiment system of the photothermal deflection technique with step optical excitation is established.The relation-ship between the photothermal deflection signals and the power of excitation beams is explored.The experiment conditions and the physical parameters of samples,which have effect on the photothermal deflection signals,are studied.The regularity between the real-time signals and the distance from probe beams to the sample surface,as well as the sample′s thermal diffusivity,is acquired and discussed.

A new method of making a real color dynamic hologram is proposed.We obtain the color and three-dimensional coordinate data of object behaviors,simulate the expression of object lightwave.The parameter of monochromatic holograms and stereoscopic image pairs are well controlled.according to theory of light propagation and the relationship between object and image,three monochromatic Fresnel holograms with stereoscopic image pairs is computed.As a result,when three monochromatic Fresnel holograms are reconstructed in the decided position of the same plane by optical method,all reconstructed images will have a superposition;Reconstruction images by optical method could be recorded and make a rainbow hologram.By the white light,color dynamic images can be seen when move our eyes.This method avoid fussy light path,obtain holograms with high quality and settle the problem for difficult to superpose all the images.

A method of fast making computer-generated hologram is proposed.Both the theory of the simplified model and simulative results are discussed.We compute the object lightwave as intermediate data,Holograms are computed base on these data.The intermediate data is much smaller than the final hologram,which allows high-speed computation at effective storage and transmission,at reduced time for computation.