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1.
This paper has introduced a kind of design method for digital urban lighting, it is an application of the illuminating engineering in digital city and a kind of measurable, dynamic visualization design method of the effect of digital urban lighting. A kind of new artificial method of scene imitation has been proposed in this paper. After taking pictures by verified digital camera, the luminosity and color information are taken to imitate the effect of urban lighting design, to display the current and future effect of lighting for the scene and thus optimize the urban lighting design plan to meet the demand of energy - conservation and beautifying the urban night scene.  相似文献   

2.
Starting from the optical factors of Climate and on the basis of CIE formulasof brightness distribution for clear and overcast sky,this paper suggests a kindof formula which can be used to compute brightness distribution on average skybrightness.Besides,it proposes a simple method by which it is easy to carryout the design of natural lighting under the condition of average sky brightnessmodel.  相似文献   

3.
外源GA3和ABA处理对红肉脐橙果实品质的影响   总被引:1,自引:0,他引:1  
以生长性状一致的成年红肉脐橙为试材,研究了果实转色前外源GA3和ABA处理对其品质的影响,结果表明:GA3处理提高了果皮的亮度,但降低了果皮红色度和单果重;外源ABA提高了果皮的红色度和黄色度,但降低了果皮的亮度和单果重;外源GA3与ABA处理均不利于果实内在品质的提高,从而在果实转色前用外源ABA和GA3处理红肉脐橙果实不利于其综合品质的提高.  相似文献   

4.
两个棉纤维发育突变体分子生物学研究进展   总被引:5,自引:1,他引:5  
王素会  杜雄明 《棉花学报》2003,15(6):376-379
概述了利用徐州142无绒无絮突变体和Ligon lintless-1在棉花细胞学、生物化学、遗传方式和分子生物学方面的研究进展。结果表明:徐州142无绒无絮突变体和Ligon lintless-1与它们的野生型相比,在胚珠细胞分化、纤维发育过程中的生化物质、分子生物学特性及遗传方式等方面有很大的差别。这对揭示纤维和短绒发育的遗传规律、大幅度提高棉纤维产量和品质都具有重要意义。  相似文献   

5.
This paper covers a new long phosphorescent material which absorbs daylight or lamp light and saves the light during the day and will illuminate after exposure,This nonradioactive, non_poisonous illuminant material will receive ultra_violet and visible lights and its luminous intensity is 10 times more than that of previous phosphorescent materials,meanwhile with more than 24 hrs phosphorescent time and 10 years lifetime,this luminous material may be used for the illuminating purposes such as indicator light.  相似文献   

6.
亚麻种质资源种子形态性状与含油量的分析与评价   总被引:1,自引:0,他引:1  
为了筛选优异亚麻种质资源,挖掘出优质育种材料,测定了231份国内外亚麻种质资源籽粒的长度、宽度、千粒重、表面积、亮度、红度、艳度及含油量,并对种子形态性状和含油量的关系进行了初步分析。结果表明,参试材料的种子形态性状和含油量存在丰富变异。聚类分析表明,参试材料在遗传距离0.15水平上可划分为4个类群,其中第Ⅰ类群籽粒亮度和红度较高,艳度最低;第Ⅱ类群籽粒的含油量、千粒重、长度和红度均最大;第Ⅲ类群籽粒含油量最低,千粒重最小,种皮亮度最低,但艳度最高;第Ⅳ类群只有1份材料,籽粒宽度最大。相关性分析表明,含油量与籽粒亮度、籽粒红度、籽粒艳度、千粒重、籽粒表面积、籽粒长度和籽粒宽度均呈极显著正相关,相关系数分别为0.255、0.391、0.261、0.548、0.457、0.529和0.385。  相似文献   

7.
To obtain the expression of maximum spectral luminous efficiency of mesopic level, we studied the contribution to spectral sensitivity in the mesopic region of the rods and cones based on heterochromatic brightness matching and reaction time, respectively. We next acquitted the expression of maximum spectral luminous efficiency of the mesopic level. Our opinion is that the results based on different experiments reflect different vision characteristics of human beings. The expression of maximum spectral luminous efficiency should be chosen in accordance with the application. We advise that the maximum spectral luminous efficiency based on heterochromatic brightness matching should be chosen in evaluating the effect of night scene lighting. The maximum spectral luminous efficiency based on reaction time should be chosen in designing road lighting.  相似文献   

8.
斯琴 《中国农学通报》2015,31(32):188-193
为了研究内蒙古地区干侵入与暴雨短时强降水相关性,认识实际系统的演变和发展及其对短时强降水暴雨的发生发展的作用进行诊断分析,基于气象观测资料、NCEP 1°×1°再分析资料和FY-2C2D卫星资料,通过卫星水汽图像和大气动力场相结合的方法揭示东北冷涡影响下2014年7月7日发生的内蒙古兴安盟地区降水过程中干侵入的特征及其对短时强降水发生发展的作用机制。结果表明:(1)对于这次过程而言东北冷涡是直接影响系统,明显有从对流层高层到对流层低层的干侵入,对流层高层具有低湿、高位涡的冷空气不断地向对流层的中下层侵入,促使低层出现了“上干冷,下暖湿”的垂直结构,有利于对流不稳定层结的形成,此时在地面锋面斜压性非常强,使暖湿空气抬升有利于形成短时强降水,出现强降水出现时间段均与低层不稳定最强及θse等值线呈上下密集分布的时刻。(2)在红外云图上表现为形成逗点云系,黑体亮温高值区与干冷区相对应,干冷区的伸入使得对流云团边缘亮温梯度增大,中心亮温值达到-53℃,短时强降水发生在对流云团东侧亮温梯度最大区域,短时强降水落区与梯度较大的区域移动方向一致。  相似文献   

9.
糙米储藏过程的品质变化与米粒图像颜色特征参数的关联   总被引:1,自引:0,他引:1  
通过测定不同储藏温度条件下的糙米脂肪酸值,同时用扫描仪采集糙米图像并基于计算机图像处理方法提取图像颜色特征,考察了储藏过程糙米的表面颜色特征参数的变化及其与脂肪酸值的关联.结果表明:用图像处理方法可以检测出糙米储藏过程米粒表面颜色的变化;糙米表面的亮度值随着储藏时间延长和储藏温度提高而增大的趋势最明显;糙米储藏过程的亮度值变化与脂肪酸值增加的趋势基本一致,全部糙米试样两者的相关系数为r=0.81,具有较强的关联性,提示了用图像处理方法及用米粒颜色特征参数表征糙米储藏过程品质变化的有效性和可能性.  相似文献   

10.
This paper has advanced a new kind of method for making wide-angle rainbow-hologram. It differs from Benton's two-step method in two aspect: (1) the replacement of the single slite by the rectanglar aperture, (2) the adoption of image-plane reception. Hence our making hologram is a wide-angle hologram, which has characteristics of a rainbow-hologram, an imaged-hologram and a three dimension hologram. Its images can be reappear by illuminating the hologram with an incandescent lamp at a short distance. This paper will introduce to the reader our optical design, relevant parameters and results of experiments.  相似文献   

11.
户外LED广告屏色光侵扰问题调查研究   总被引:1,自引:0,他引:1  
近年来LED广告屏在城市中广泛使用,但居住区周围布置的LED广告屏在夜间对居民形成了强烈的色光侵扰。为了明确LED广告屏形成的色光侵扰程度及其防控措施,以北京、天津地区17处LED广告屏及受其侵扰的居住建筑为研究对象,展开主观问卷调查,并现场测试LED广告屏侵扰光的色坐标、亮度等参数,获得187份调查问卷及288组测试数据。通过对比分析主观问卷和测试数据,明确了LED广告屏的主要侵扰因素为LED屏与居住建筑的相对位置关系、LED屏侵扰光亮度水平及其数值变化和LED屏的光色交替变化,提取了各侵扰色光的波长及亮度数值范围,提出了对LED屏幕设置的建议。  相似文献   

12.
蜡液处理对橘橙7号贮藏保鲜效果的影响研究   总被引:1,自引:0,他引:1  
以橘橙7号果实为材料,研究了经不同果蜡等4个处理后(Decco Fruitshine 402F,FMC890,自备蜡,经机器清洗后作为对照),于常温贮藏下果实的采后行为。结果表明,贮藏25 d后所有果蜡处理均能减少果实失质量,但以自备蜡最佳;402F处理可明显提高果实的亮度。  相似文献   

13.
14.
雷蒙德氏棉基因组草图的完成为棉花的基础研究奠定基础,然而该基因组草图仍需要后续的补充和完善。利用雷蒙德氏棉基因组草图信息,分别在6条较长染色体的端部选取了4 kb的序列。通过生物信息学分析这些序列在基因组中的拷贝情况,发现2号染色体一端的序列Chr2D属于单拷贝序列,且其内部没有重复序列。随后以该段序列为探针,对雷蒙德氏棉有丝分裂中期染色体进行荧光原位杂交,结果显示在1号染色体和4号染色体的一端有明显的杂交信号,信号大小远远大于4 kb序列所能产生信号的大小,而信号的强度则比正常的杂交信号暗弱。试验结果说明该4 kb序列Chr2D可能在1号染色体和4号染色体的1个端部有较高的拷贝数,而信号强度的暗弱则说明该序列在染色体上的分布方式可能为散漫分布。杂交信号在1号染色体和4号染色体上的相似性说明,这2对染色体可能有一定的亲缘关系。该结果将对雷蒙德氏棉基因组草图的补充完善有帮助。  相似文献   

15.
In the modern cinema design, the auditorium is the kernel of its technological design. There is a close relationship between the screen and the scale of auditorium; therefore, to determine the width of screen and the scale of the auditorium correctly, the film projection and cinema technique should be acquainted with. The width, height, brightness of the screen and the luminous flux, focus of the cineprojector are important factors of cinema auditorium design.  相似文献   

16.
荔枝酒储藏期间非酶褐变因素影响研究   总被引:1,自引:1,他引:0  
色泽不稳定是荔枝酒生产遇到的常见问题。采用紫外分光光度计与色差计,研究了36d储存期非酶褐变因素对荔枝酒褐变度以及荔枝酒亮度的影响。结果表明,荔枝酒储藏期间,温度、糖度、氧气量和光照强度都与荔枝酒的褐变度成正比,与荔枝酒的透明度成反比关系。低糖度的荔枝酒在密封瓶装并置于4℃低温条件下保存36d后,在波长420nm下的吸光度只增加0.003,亮度仅降低0.58,很好地抑制了荔枝酒非酶褐变的反应速率。  相似文献   

17.
ABSTRACT This paper presents a contemporary survey and synthesis of research on the regional dimensions of technology and competitiveness and explores ways in which technological change has influenced industrial restructuring in U.S. regions. Neoclassical models of regional growth are judged to be seriously wanting in their treatment of technological change. Industrial organization theories such as product/profit cycles, best-practice firms, and flexible specialization have proven to be more illuminating. However, the task remains to integrate technology as a core element in a geography of production and regional economic change that includes both global strategic decision-making of companies and the viability of plants in particular regional settings. Although the federal government as sponsor and procurer of technology has contributed significantly to regional industrial restructuring, the prospects for state and local governments to facilitate technological change appear to be very limited.  相似文献   

18.
遥感监测土壤湿度的方法综述   总被引:14,自引:2,他引:12  
通过对生态环境水热因子的遥感监测回顾,总结出定量地遥感监测土壤水分的方法主要有:微波遥感监测法、热惯量法、作物植被、亮温综合指数法和热红外法等,并对各方法的原理和具体的适用领域做了介绍和比较。  相似文献   

19.
In order to quantify the WLED's impact on color of Chinese traditional calligraphy and painting, and explore the practical applicability of using WLED as display lighting, an experiment was carried out on the RYGB type of WLED irradiated models of calligraphy and painting. And the color parameters was tested periodically to make curve charts of color coordinate and luminance over time. The impact of the WLED on hue, saturation, brightness was quantified based on the carve to provide evidence of application of WLED.  相似文献   

20.
According to the daily change law from curves for percentage insolation,this paper presents a new formula of the average insolation in the zones where the insolation is more than 70%. By means of the hourly observing data during two years for solar direct ratiation, cloudage and sunshine condition in seven zones different lighting climate,considering the vaper pressure and the altitude present the function of percentage insolation and the probability of four sky brightness classification,this formula has a certain precision to be proved by observation.  相似文献   

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