Automatic image annotation refinement based on keyword co-occurrence and WordNet

图像自动标注是模式识别与计算机视觉等领域中的重要问题。针对现有图像自动标注模型普遍受到语义鸿沟问题的影响,提出了基于关键词同现的图像自动标注改善方法,该方法利用数据集中标注词间的关联性来改善图像自动标注的结果。此外,针对上述方法不能反映更广义的人的知识以及易受数据库规模影响等问题,提出了基于语义相似的图像自动标注改善方法,通过引入具有大量词汇、包含了人知识的结构化电子词典WOrdnET来计算词汇间的关系并改善图像自动标注结果。实验结果表明,提出的两个图像自动标注改善方法在各项评价指标上相比以往模型均有所提高。Image automatic annotation is a significant and challenging problem in pattern recognition and computer vision areas.At present,most existing image annotation models are influenced by semantic gap problem.This paper proposed a new image automatic annotation refinement method based on co-occurrence to overcome above problem,which used the correlations between keywords in dataset to improve image annotation result.However,above method did not reflect the generalized knowledge of people and easy influenced by the size of dataset.Aiming at above problem,it proposed a new image automatic annotation refinement method based on semantic similarity to overcome above problem.This method used semantic dictionary WordNet to calculate the correlations between keywords and improve the image annotation results.Experimental results conduct on Corel 5K datasets verify the effectiveness of proposed image annotation method.The proposed automatic image annotation model improves the annotation results on all evaluation methods.国家自然科学基金资助项目(60873179;60803078;10871221);高等学校博士学科点专项科研基金资助项目(20090121110032

海西对台光电产业产学研合作现状及趋势

海峡西岸对台光电产业产学研合作是两岸科技界高度重视的一项重点工程,在两岸政策的引导下,在市场需求及产业界、学术界的共同推动下,合作领域越发广泛,合作交流的形式和渠道不断拓宽,带动两岸科技进步及经济发展。本文着重分析了两岸光电产业的发展现状和海西对台光电产业产学研合作现状、趋势,阐明了合作机制及相应的目标与重点、方式等。在此基础上提出了海峡西岸经济区对台光电产业合作的策略及对两岸光电产业良性发展的建议。福建省科技计划项目（2016R0091）;福建省高等教育教学改革研究项目（JAS151398）

Analysis on death causes of liver cancer of inhabitants in Xiamen City from 2002 to 2011

目的了解2002-2011年厦门市居民肝癌死亡趋势、分布特征及寿命损失情况。方法对2002-2011年厦门市肝癌死亡登记资料和人口数据进行统计分析,通过计算死亡率、标化死亡率、年均增长死亡率及寿命损失年等指标,评价居民的肝癌死亡及寿命损失情况。结果 2002-2011年厦门市肝癌年均死亡率为32.70/10万,标化死亡率为34.48/10万,居恶性肿瘤死亡顺位第1位,总体趋势有下降,但差异无统计学意义(2趋势=2.13,P=0.144)。男性、女性、城区、郊区、农村的肝癌年均死亡率均呈下降趋势,但只有郊区下降有统计学意义(2趋势=7.46,P=0.006)。肝癌死亡率比较:农村>城区>郊区,男性死亡率高于女性,差异有统计学意义(2=1 758.80,P<0.001)。肝癌主要危害中老年人群,死亡年龄的中位数为57岁,89.37%的死亡病例发生在40岁以上人群。肝癌潜在寿命损失年为93 378.0人年,平均减寿年数为20.17人年,减寿率为5.74‰,男性和农村居民寿命损失较严重。结论 2002-2011年厦门市肝癌死亡率整体呈下降趋势,但对中老年人群的危害仍很严重,应继续加强防控力度。Objective To gain the knowledge of trends in mortality,distribution characteristics and potential years of life lost caused by liver cancer among Xiamen population from 2002 to 2011.Methods Mortality rate,standardized mortality rate,average annual growth rate of mortality and years of life lost have been employed to evaluate the mortality of liver cancer and years of life lost caused by the disease among population in Xiamen.Results The average annual mortality rate of liver cancer among Xiamen population was 32.70 /105.After the standardization,the rate was ascended to 34.48 /105,ranking in the top of the death causes.Compared to historical data,the mortality rate slightly decreased in total.However,no statistical significance was observed.The average annual mortality rate of male,female,urban,suburban and rural areas were decreased,but only a statistically significant decrease in the suburban was noted.As for the locations,the mortality rate in rural area was the highest,and that of urban area maintained in the second position,and the rate of suburb area was the lowest in Xiamen.The reduction on the average mortality rate among female population was greater than that of its counterparts.We also observed that the reduction was greater in rural areas than in the rest of city.However,the differences were not statistically significant.Liver cancer mainly affected the middle-aged and old population,and the median of death age was 57 years old.Furthermore,89.37% of deaths were reported in the population older than 40 of years.The potential years of life lost caused by liver cancer among Xiamen population was 93 378.0 PY and AYLL was 20.17 PY,and PYLL rate reached 5.74‰.The years of life lost caused by liver cancer among male and rural population are serious.Conclusions The mortality rate of live cancer among Xiamen population between 2002 and 2011 has been declined in general aspect.However,the liver cancer still renders great threat to the health among middle-aged and old population.Therefore,the prevention and control strategy should be further promoted.福建省卫生厅青年科研课题(2010-2-113

Testing System of Phosphor Excited by Blue LED Based on Integral Sphere

为尽可能反映荧光粉在实际工作条件下的发光性质,准确测量荧光粉的发光性能,提出了一种基于积分球的荧光粉发光性能测试系统。该系统采用蓝光lEd作为激发光源,配置有TEC控温系统对光源有效实施控温,可提供持续稳定的激发荧光粉发光。采用出光筒控制光源方向和积分球收集光线,能有效防止能量损失,提高测试的精确性。通过实验得到了不同强度蓝光激发下的荧光粉光谱功率分布以及发光效能、量子效率、光转换效率等参数的变化规律。随着驱动电流的增大,由于蓝光芯片内量子限制斯塔克效应,从而导致蓝光峰值波长出现小幅度的蓝移。三种效率在小电流下基本呈线性下降趋势,且在大电流下趋于平缓。实验结果表明,该系统及方法可以有效地评价实际lEd芯片工作状态下的荧光粉发光性能。A testing system for phosphor luminous characteristics based on integral sphere is proposed so as to show luminous characteristics of phosphor at actual operation circumstances and measure its luminous characteristics accurately.Blue LED is used as an excited source in the system.TEC temperature control system is used to control the temperature of the source effectively.And continuous and stable excited light is provided to excite phosphor illumining.Energy loss is prevented effectively and testing accuracy is enhanced for the direction of source controlled by a light tube and light ray collected by integral sphere.Based on experiments,spectrum power distributions of phosphor excited by blue light with difference light strength and variation rules of parameters such as luminous efficiency,quantum efficiency and light conversion efficiency are got.With the increasing of driving current,a small blue shift appears in blue light peak wavelength for quantum confined Stark effect in blue light chip.Three kinds of efficiency almost show linear decline trend at low current and then approach to constant at high current.Experimental results show that luminous characteristics of phosphor on real LED chip at operation state can be evaluated effectively by the system and method.国家自然科学基金项目(11104230); 福建省重点科技项目(2011H6025;2012H0039

White LED Phosphor Performance Tested by Spectro320e Spectrometer

我国lEd产业发展非常迅速,稀土钇铝石榴石(yAg)系列荧光粉广泛应用于白光lEd。德国InSTruMEnT SySTEMS公司的SPECTrO320E光谱仪适合光谱的精确测量,文章结合SPECTrO320E和远方公司的PE-5荧光粉激发装置,实现蓝光激发下黄色yAg荧光粉的色品坐标、相对亮度、量子效率等参数精确的测试,研究了仪器在不同的测试条件如暗电流、光电倍增管、密度滤光片等设置的不同,对测试结果的影响,并给出利用本装置测试荧光粉时应该注意的事项。LED industry in china develops rapidly.Yttrium aluminitum garnet(YAG) phosphors are widely applied in white LEDs.The Instrument Systems company's Spectro320e spectrometer is suitable for accurate measurement of the spectrum.It is combined in this paper with the Everfine company's PE-5 phosphor excitation device to achieve the accurate testing of yellow YAG phosphors excited by blue light,such as chromaticity coordinates,relative brightness and quantum efficiency.We also studied the influence of different testing conditions on the results,such as dark current,PMT and density filter.The cautions are provided herewhen using the Spectro320e spectrometer

Preparation of nano-TiO_2 with high reflectance

采用溶胶-凝胶法制备纳米TIO2,利用紫外-可见-近红外分光光度计测定样品在400--2500 nM的反射率。系统研究了制备条件对样品反射率的影响,并确定了最佳制备条件。所制备的纳米TIO2粉体的平均反射率大于110%,明显高于市售的太阳热反射粉,该粉体能够作为良好的太阳热反射涂料颜填料。Nano-TiO2 were prepared with sol-gel method,and the reflectance of nano-TiO2 in the range of 400-2500 nm was determined by UV-VIS-NIR spectrophotometer.The effects of preparating conditions on reflectance were systematically investigated,and the optimum preparating conditions were obtained.The average reflectance of nano-TiO2 was larger than 110%,aparently higher than that of the marketable solar reflective powders.This powder can be used as good fillers in solar reflective coatings.福建省自然科学基金(2009J05036)资

Thermal characteristic analysis of high-power LEDs by structure functions

运用电学法测量功率型lEd冷却瞬态温度曲线,通过数学方法将其转化为积分和微分结构函数来分析器件各区域的热阻和热容,结果发现,各层材料的测量值与理论值基本一致。1μS的瞬态数据采集精度和高的重复性保证了实验结果的准确性和可靠性,运用这种方法比较了3种不同金属芯印刷电路板(MCPCb)对功率型lEd的散热效果,贝格斯Al基板散热性能最好,AnTAl基板次之,普通Al基板最差。研究表明,利用结构函数分析功率型lEd的热特性是一种强有力的方法。The cooling transient temperature curves of high-power LEDs are measured by electritical method.The cumulative and differential structure functions are extracted from these curves to analyse thermal resistances and thermal capacitances of all regimes of high-power LEDs with numeric computational method.It is found out that calculated and measured values of various materials are essentially conformable.The sampling resolution of 1 μs of transient data and high repetition assure the veracity and reliability of experimental result.Subsequently,thermal conduction capabilities of three different metal core printed circuit boards(MCPCBs) with high-power LEDs are compared by this method,and it is discovered that bergquist′s MCPCB has the best thermal conduction capability,ANT′s MCPCB takes second place,and the common MCPCB is the worst.So the structure functions are powerful tools for thermal characteristic analysis of high-power LEDs.国家“863”计划资助项目(2006AA03A175);福建省科技项目(2006H0092;2008J0030);厦门市重大专项资助项目(3502Z20061004

Design of a Temperature-Controlled Test System for Luminous Intensity Spatial Distribution Characteristics of High Power LED

发光二极管(lEd)的光强空间分布特性决定了它能否满足特定场合的应用。大功率lEd由于发热量大,其绝对光强空间分布(lISd)的测试也必须在特定热沉温度下进行才能得到准确可靠的结果。设计了一个可对大功率lEd进行热沉温度控制且快速实现lISd自动测试的系统。该自动测试系统基于lEdgOn-100测角光度计及其高精度的二维旋转台,配合测试适配器、温度控制器、光度探头、kEITHlEy 2400源表和测试软件组成。测试软件基于dElPHI程序语言开发。在控温条件下,该lISd自动测试系统稳定可靠,测试时间大大缩短,测试结果实时直观。利用该自动测试系统对具有朗伯型和蝙蝠翼型两大lISd类型的lEd进行测试,获得它们的二维lISd和三维lISd。实验结果表明:随着热沉温度的增加,光强绝对值下降,而相对lISd却不变。Characteristics of the luminous intensity spatial distribution(LISD) of light emitting diodes(LEDs) are capable of determining whether these devices can be applied on specific occasions.The absolute LISD of high power LED can be accurately measured only when LED is fixed at a specific heat- sink temperature because of the LED′s large heat-generating capacity.In this study, an automatic test system based on LEDGON-100 goniophotometer and the meter′s high-precision two-dimensional(2D) revolving platform, is designed.In addition, it comprises of a test adapter, a temperature controller, a photometer head, a Keithley 2400 source meter, and an in-house-developed software package.This assembly can both control heat-sink temperatures and measure the LISD characteristics rapidly for high- power LEDs.The software is developed using Delphi programming language.The test system is stable and reliable.The test time is greatly reduced and measurements are instantly displayed.Two general types of LEDs, Lambertian type and batwing type, are measured by the system to obtain their 2D and three-dimensional(3D) LISDs.Experimental results show that the absolute luminous intensity decreases as the heat-sink temperature increases.However, the relative LISDs are the same under different heat-sink temperatures.国家自然科学基金(11104230); 福建省重大科技项目(2011H6025;2012H0039

3种养殖方式下沐浴角骨海绵生长状况的差异分析

沐浴角骨海绵（Spongia officinalis）主要分布于海南沿海，其骨架不由骨针而是由海绵硬蛋白组成，因而拥有良好的吸水性和柔性，在海洋生物材料开发领域具有较好前景。为了培育该地域特色的海绵品种，在海南省儋州水牛坡村潮间带海域（109.40° E, 19.87° N）开展了为期一年半的沐浴角骨海绵人工养殖，通过组织块的长、宽、高变化表征海绵的增长，分析了3种养殖方式下该海绵的生长状况差异。结果显示：在瓷砖法、穿绳法和弹簧法养殖方式下的角骨海绵均有较高的存活率，分别为80%，60%和50%，其中以瓷砖法最佳。在瓷砖法下，海绵组织块的平均长度增长率为67.1%，显著高于穿绳法和弹簧法（p<0.05），平均宽度增长率为63.5%，平均高度增长率为73.2%，可见瓷砖法相对于其他两种方式在存活率和增长率有较大优势，适宜于沐浴角骨海绵的养殖。此外，生长指标与海水温度的相关性分析结果表明，沐浴角骨海绵组织块的增长与水温之间的相关性不显著，增长速度不呈季节性变化。综上，在自然条件下获得的沐浴角骨海绵的第一手养殖资料有助于基础的海绵生物学研究，促进未来当地特色海洋经济的发展。海南省本级部门预算项目厦门南方海洋研究中心项目(17GYY008NF04

Comparison of Luminous Efficiency of InGaN-based High-voltage LED with Traditional High Power LED

主要从三个不同角度探究并分析了基于In gA n材料的高压lEd的发光效率优于传统大功率lEd的原因。为了保证实验结论的可靠性,文中所采用的实验样品具有相同的芯片尺寸和材料以及相同的封装结构。经过大量的实验证明,更均匀的电流分布和小芯片间隙的出光,使得高压lEd的发光效率优于传统大功率lEd。结果显示,在相同的1 W输入功率下,高压lEd的发光效率比传统大功率lEd高大约4.5%。The reasons of the luminous efficiency of In Ga N-based high-voltage light-emitting diode(HV-LED)better than that of traditional high power(THP) LED are researched and analyzed from three different aspects.Theexperimental sample with same chip size, material and package structure is adopted to ensure the reliability of ex-periment conclusions.Experiments show that the luminous efficiency of HV-LED is better than that of THP LED foruniformer current distribution and the light from the microchip gap.The results show that the luminous efficiency ofHV-LED is approximately 4.5% higher than that of THP-LED under 1 W input power.国家863项目(2013AA03A107); 福建省产学研重大科技项目(2013H6024); 福建省重点科技项目(2012H0039)资