聚合物白光发光二极管的研究进展

针对聚合物白光发光二极管(WPLEDs)在显示和照明领域广阔的应用前景,从器件结构和相关材料方面进行了讨论。从结构上将白光器件分为单发光层器件和多发光层器件;从发光材料的性质上将白光器件分为荧光器件、磷光器件和单一高分子白光器件。通过探讨各种器件的优势和不足,提出了各种器件的发展方向,并对WPLEDs面临的机遇和挑战做出了评述。     

基于HDR的延迟光照技术

在研究光照模型的基础上,重点分析了延迟光照技术和高动态范围(HDR)技术,并研究了基于高动态范围技术的延迟光照技术,在延迟光照的后处理阶段引入高动态范围技术,发挥两者的优点,基于GPU实现了加速绘制。实验证明,使用基于高动态范围技术的延迟光照技术,表现的场景更加真实,细节表现更加丰富。在延迟光照中,使用高动态范围技术,虽然降低了绘制速度,但仍然达到了25FP/s。     

夜景照明与历史文化街区的保护和发展——以泉州中山路为例

历史文化街区是一个城市的灵魂所在,是社会文化得以延续的重要物质空间。在对历史街区进行夜景照明时,从保护和发展的角度探讨了街区夜景照明的意义,营造的特殊技术以及照明的塑造方法、设计原则。通过对泉州中山路街区夜景环境要素分析,关注实物景观和非物质文化遗产的保护和发展,采用高效美观的照明技艺,使夜景灯光营造既能实现对街区历史文化脉络的保护,又促进其在当代的发展。     

三维电脑绘图灯光应用新技术探讨

随着三维绘图软件的不断升级,几年来灯光应用提出了很多新的理论,绘图水平也有了普遍提高.本文通过对传统的与流行的灯光渲染方法的比较,重点介绍最新的光能传递和光度学灯光的使用方法.     

传统灯具设计的艺术特征及其现代运用

中国传统设计历史悠久,灯具设计作为其中一个重要的组成部分,以其独特的民族风格和审美韵味傲然屹立于世界灯具之林。中国历代灯具的发展大致分为五个时期,不同时期的灯具造型各异、神韵独特,其传统设计中无不透视出社会经济技术、思想观念和民族审美的进程与发展,许多优秀的灯具设计,不仅具备完善的使用功能,而且还具有极高的审美价值,对于现代灯具设计有着十分重要的启发与借鉴意义。     

太阳能楼道照明系统设计及其前景分析

为了适应时代发展的要求,努力开发和利用新能源,达到节能减排、保护环境的目的,实现节能减排与保护环境的一体化。设计了一类太阳能楼道照明系统,通过此类系统可以实现捕捉光并对光加以收集,然后通过光线管道将光导通到各个楼道中,从而达到照明楼道的作用。最后,对该类系统的应用前景进行了分析。     

20世纪以来鞭炮年俗的城市命运透视

鞭炮作为春节的文化符号已经延续了过千年,承担起了不可替代的民俗使命,承载着人们的寄托和感情,是一项百姓非常喜爱的年节习俗。鞭炮年俗共经历了三次沉浮起落,第一次是民国初年,由于国家政权变化交替,社会秩序的嘈杂无序;第二次是“九?一八”之后,国家面临厄运之际;第三次是在中国改革开放之后,经济的迅速发展,城市化进程的加快,城市人口密度的增加,由于环境的改变,燃放鞭炮造成了火灾、环境污染、人员伤亡等现实社会问题。通过梳理,可以清楚地看到社会经济基础和上层建筑的变化会直接影响民俗活动的变化,也可以看到民俗本身所具有的强大惯性。对于民俗活动,我们不能简单地加以干预,必须尊重民俗应有的规律,适当调控,顺应民俗发展的历史,实现民俗的繁荣。     

Effects of artificial night lighting on endangered ocelots (Leopardus paradalis) and nocturnal prey along the United States-Mexico border: A literature review and hypotheses of potential impacts

Artificial night lighting is one of the least studied outcomes of urbanization. While the effects of night lighting on mammals and their habitats seem obvious, they remain difficult to quantify. By reviewing laboratory and field studies conducted on mammals since 1943, this paper summarizes the most salient effects of artificial night lighting on activity patterns and behavior. These studies assist us in generating hypotheses regarding the effects of lights, erected across the militarized U.S.-Mexico border, on the endangered Ocelot and its nocturnal prey. We predict that activity patterns for Ocelots and their nocturnal prey would be altered under artificial night lighting conditions. Specifically, evening activity levels would either be reduced or redirected towards areas with dense vegetation. In addition, Ocelot foraging success would likely be altered as a result of turning night into day. Recommendations are made for Ocelot recovery and future research on surrogate species.     

Fitting a semi-parametric model based on two sources of information

This paper discusses fitting a semi-parametric model based on two sources of information, motivated by a rat sleep dataset. In a recent study, rats were exposed to two different lighting conditions. The first (baseline) condition was a standard 24-hour schedule of 12 hours lights on, 12 hours lights off; the second (test) condition exposed rats to a continuous 3 hours lights on, 3 hours lights off schedule. Rat sleep was believed to be affected mainly by the circadian rhythm under the baseline lighting condition and by both the circadian rhythm and light under the test lighting condition. This paper suggests fitting a non-parametric model for the dataset under the baseline lighting condition. For the dataset under the test lighting condition, a two-part model is suggested. The first part equals an unknown coefficient multiplied by the non-parametric function used for modelling the dataset under the baseline lighting condition, explaining the remnant of the circadian rhythm under the test lighting condition. The second part is a periodic non-parametric function which would explain the effect of the test lighting condition. This modelling procedure can be used to model other physiological parameters affected by both intrinsic and extrinsic factors.