The Research on the Certain New Key Algorithms of License Plate Recognition System

随着信息技术和智能技术的发展，交通管理系统的信息化、智能化已成为发展的趋势。车牌识别系统(LicensePlateRecognition简称LPR)是智能交通系统(ITS)的核心组成部分，在现代交通管理系统中发挥着重要的作用。车牌识别是指通过计算机视觉、图像处理与模式识别等方法从机动车辆图像中提取车牌字符信息，从而确定车辆身份的技术，在公共安全、交通管理、流量观测、电子收费系统及有关军事部门等方面都有着广泛用途和良好的应用前景。 本文研究了车牌识别系统的三项关键技术:车牌图像的定位分割技术、车牌字符的切分技术和车牌字符的识别技术。车牌定位分割是整个车牌识别系统的基础和前提，直接关系到后续处理...With the development of information technology and intelligence technology, the informalization and intelligentizing of traffic management has already been the trend. License Plate Recognition system (LPR) is the core of the Intelligent Traffic System (ITS). And it plays an important role in modern traffic management systems. LPR is the technique to get the character information from vehicle image...学位：工学硕士院系专业：信息科学与技术学院计算机科学系_计算机应用技术学号：2212005130233

HSV色彩空间中的多阈值车牌定位分割方法

摘要: 本文是在 HSV颜色空间下, 根据车牌区域的颜色和几何特征, 通过多阈值分割的方法, 综合利用数学形态学运算、 连通域形状和字符密度检测, 有效解决了彩色图片车牌提取的问题。 实验表明, 该方法效果好, 精度高, 通过 154 幅实测机动车图象进行车牌定位分割, 准确率91%。福建省青年科技人才创新项目资金: "基于视频的运动体检测与控制技术" (2001J003

Preparation of agricultural low-cost super water absorbent

概述了合成类吸水树脂在农用上的进展,提出采用低成本且工艺成熟的水溶液法,以丙烯酸(AA)、丙烯酰胺(AM)为基体、接枝可溶性淀粉进行三元单体共聚,经钠基膨润土改性,复合引发剂、复合交联剂制备低成本、易降解的合成类吸水性树脂。经实验改进和工艺条件优化后,树脂吸去离子水倍率可达1 940.9 g/g,吸自来水899.8g/g。采用红外光谱仪、热重分析仪、扫描电镜、X射线衍射仪等分析手段对合成树脂进行了分析表征,证实了产物为淀粉、丙烯酸及丙烯酰胺的共聚物。The utilization status of the synthetic absorbent resin in agricultural applications was summarized.An improved process of three monomer copolymer system was proposed by using an aqueous solution polymerization.These three monomers are soluble starch,acrylic acid and acrylamide,which are modified by sodium bentonite,using a composite initiator and cross-linker.By improving the experiments and optimizing the process conditions,the absorption rate of the synthetic absorbent resins is up to 1 940.9 g/g in deionized water,and 899.8 g/g in tap water.In addition,the structure and performance of the synthetic absorbent resin were characterized by using infrared spectroscopy,thermal gravimetric analysis,scanning electron microscopy and X-ray diffraction,which shows that it is an copolymer of starch,acrylic acid and acrylamide

Structural Analysis of ZnS Thin Film Prepared by Thermal Evaporation

用双舟热蒸发制备了掺稀土硫化锌薄膜，用X射线衍射技术对硫化锌粉末和所制薄膜的晶体相结构进行研究，发现硫化锌薄膜的晶体结构与硫化锌粉末的晶体结构不同。薄膜晶体的生长受诸多因素影响，有择优取向生长趋势，是二维层状结构沿C轴方向的密堆积。这些研究为高新材料的研制提供了参考。ZnS thin films doped with erbium are prepared by thermal evaporation with two boats , and the crystalline phase structures of ZnS powder and the prepared films are studied using x-ray diffraction technique.lt is found that the structure of ZnS film is dif- ferent from that of ZnS powder.The growth of film crystal is affected by numbers of factors and tends to a preferential orientation.The film is two-dimensional layer struc- ture packing along c axis.lt provides basis for research on new luminescence material with high efficiency.福建省自然科学基

Epidemiological survey and study of gestational diabetes mellitus

目的:调查厦门地区妊娠期糖尿病(gdM)患病率及妊娠结局,研究与gdM发病相关的高危因素。方法:收集2013年6月~2014年3月就诊于厦门市妇幼保健院的2 151例孕妇的一般资料及75 g口服葡萄糖耐量试验(OgTT)结果,并随访其妊娠结局。将调查对象分为对照组和gdM组,分析、比较两组妊娠并发症、高危因素和妊娠结局。结果:厦门地区gdM患病率为15.20%。gdM组羊水过多发生率及剖宫产率明显高于对照组,差异有统计学意义(P0.05)。年龄、孕前体重及孕前体重指数(bMI)与gdM发病率显著相关(P 0.05).Age,progestational weight and progestational body mass index( BMI) were significantly correlated with morbidity of GDM( P < 0.05).Conclusion: The pregnant women with GDM are more likely to have polyhydramnios and cesarean section.Age,progestational weight and progestational BMI are high risk factors of GDM.福建省医药卫生科技创新项目〔2014-CXB-46

壳聚糖絮凝法处理明黄膏提取液的研究

甘肃省自然科学基金暨中青年科技基金项目 (项目编号YS 0 11 A2 3 0 15

Optimization of Hydrometallurgical Purification for SiO_2 in the Process of Preparing Solar-grade Silicon

考察了Hf质量分数、H2C2O4质量分数、HnO3质量分数、酸浸时间、粒径、液体质量与固体质量的比值(简称液固比,下同)等因素对混酸法提纯SIO2工艺过程的影响,利用电感耦合等离子体发射光谱仪(ICP-OES)、场发射扫描电子显微镜(SEM)进行表征。结果表明,最佳工艺条件为:W(Hf)=2%、W(H2C2O4)=3%、W(HnO3)=30%、酸浸时间4 H、粒径100~120目、液固比4∶1、酸浸温度30℃。fE、Al、CA、P杂质的去除率分别达到99.99%、14.02%、73.27%、60.00%,经混酸法处理后SIO2中杂质总量的质量分数降至1.465x10-4。As a pre-treatment unit for preparing solar-grade silicon,hydrometallurgical route could remove most metallic impurities in silicon dioxide(SiO2) and raise the yield of the final product.Acid leaching of SiO2 could reduce the cost and energy consumption of industrialized development.Combined with high purity of reducing agent,the successor process of pyrometallurgy can also achieve "continuous casting".Factors such as the mass fraction of leaching agent,time,the particle size of SiO2,and the liquid-solid ratio were investigated,and the samples were characterized by means of ICP-OES,SEM,etc.The optimal reaction conditions were as follows:w(HF)=2%,w(H2C2O4)=3%,w(HNO3)=30%,reaction time 4 h,the average size of SiO2 powder particle 100～120 mesh,the liquid-solid ratio 4∶1,and room temperature 30 ℃.It was found that the final removal rates of impurities of Fe,Al,Ca,P could reach 99.99%,14.02%,73.27%,and 60.00% respectively and the mass fraction of total amount of impurities could be reduced to 1.465×10-4

Analysis on gene detection results of 3715 cases with thalassemia in Xiamen

目的:调查厦门地区地中海贫血基因的携带率、基因突变类型及其频率分布。方法:对2013年1月~2014年8月在该院住院或门诊治疗的患者及健康体检人员共3 715例进行地中海贫血基因检测,对检测结果进行统计分析。结果:检测出静止型α-地中海贫血200例(5.4%),中间型α-地中海贫血44例(1.2%),标准型α-地中海贫血1 213例(32.6%),β-地中海贫血787例(21.2%),α-合并β-地中海贫血69例(1.8%)。结论:不同就诊对象地中海贫血检出率具有明显差异,血常规是筛查地中海贫血高危孕妇的一个有效手段,但也存在一些缺陷,需引起重视。Objective: To survey the carrying rate,types of gene mutation,and frequency distribution of thalassemia gene in Xiamen.Methods: Thalassemia gene detection was conducted among 3 715 patients treated in the hospital or in outpatient department of the hospital and healthy cases receiving physical examination,the results were analyzed statistically.Results: Among the cases,200 cases( 5.4%) were diagnosed as silent α-thalassemia,44 cases( 1.2%) were diagnosed as intermediate α-thalassemia,1 213 cases( 32.6%)were diagnosed as standard α-thalassemia,787 cases( 21.2%) were diagnosed as β-thalassemia,69 cases( 1.8%) were diagnosed as α-thalassemia combined with β- thalassemia.Conclusion: The detection rates of thalassemia among different objects vary,blood routine screening is an effective means for screening high-risk pregnant women,but there are some defects,which should be paid more attention to

艾纳香油通过NF-κB非经典信号影响花生四烯酸代谢缓解LPS所致巨噬细胞的炎症反应

目的本文旨在探讨艾纳香油（BBO）通过核转录因子κB（NF-κB）非经典通路影响花生四烯酸（AA）代谢通路发挥抗炎作用。方法采用豚鼠离体回肠法检测BBO对慢反应物质（SRS-A）生成的影响，ELISA法检测BBO对脂多糖（LPS） 诱导巨噬细胞前列腺素E2（PGE2）及白三烯 B4（LTB4）产生的影响，qRT-PCR检测BBO对LPS诱导巨噬细胞COX-2、5-LOX、FLAP和RelB表达的影响，Western blot检测BBO对NF-κB非经典通路蛋白肿瘤坏死因子受体作用因子3（TRAF3）、肿瘤坏死因子受体作用因子2（TRAF2）、NF-κB 诱导激酶（NIK）、p100和RelB浓度的影响。结果在1mg·mL-1的BBO药物浓度下减弱了豚鼠回肠的收缩张力（P＜0.001），对SRS-A的生成抑制率达到65.34%；与LPS模型组相比，BBO在40-80 μg· mL-1浓度下降低AA代谢通路中PGE2（P&lt;0.05）和LTB4（P&lt;0.05）的浓度，降低COX-2（P&lt;0.05）、5-LOX（P&lt;0.05）和FLAP（P&lt;0.05）的表达；此外，40-80 μg· mL-1浓度下BBO还降低LPS导致的NF-κB非经典通路中TRAF3（P&lt;0.05）、TRAF2（P&lt;0.05）和NIK（P&lt;0.05）的浓度，进一步抑制p100蛋白的磷酸化（P&lt;0.05），同时抑制转录因子RelB的表达（P&lt;0.05）和RelB蛋白的水平（P&lt;0.05），而BBO自身不引起这些基因与蛋白的变化。结论BBO可能通过抑制NF-κB非经典信号中调节蛋白TRAF3和TRAF2，转录因子RelB的浓度，造成NIK蛋白的诱导激酶作用受到抑制，进一步抑制了p100蛋白的磷酸化及其与转录因子RelB的结合，从而影响到下游AA通路中重要限速酶COX-2、5-LOX和 FLAP的表达与炎症介质PGE2和LTB4的水平发挥抗炎作用

Influence of Different Enzyme Preparation on Premature Yeast Flocculation activity of PYF Factor from Malt

选取2种不同复合酶制剂,采用乙醇沉淀法提取出麦芽中PYF因子,通过模拟糖化条件及添加不同酶量来考察外加酶是否对PYF因子具有水解能力。结果发现,与对照组PYF活力值(F=78.79)相比,不同添加量的2种复合酶与PYF因子作用后PYF活力值没有发生显著变化(P>0.05),即PYF因子是一种结构特殊、复合酶不能水解的多糖大分子。Through simulating saccharification condition and adding different enzyme amount,the hydrolysis abilities of 2 different kinds of enzyme preparation on PYF factor,which was extracted from malt by ethanol precipitation, were measured and compared.The results showed that compared with the PYF activity value(F=78.79) of control group,PYF activity value didn't change significantly(P>0.05)after 2 kinds of enzyme with different adding amounts acted with PYF factor,namely that PYF factor was a kind of polysaccharide with a higher molecular weight and special structure and couldn't be hydrolyzed by enzyme