Design and Implementation of Forest Fire Prevention Decision-assisting System in a City

森林生态系统作为陆地生态系统中面积最大最多、最重要的自然生态系统，也是可持续发展的基础，森林生态系统对于经济发展是不可或缺的一部分，越来越多的人意识到森林生态系统的不可替代性。森林保护需要预防和消除对森林的各种破坏和灾害，最大限度避免和减少森林资源的损失，在这其中，森林火灾是森林保护工作者所要面临的重要难题。 论文设计与实现了一款森林防火指挥决策辅助系统，森林防火信息系统是为了达到森林防火的目的，借助譬如森林资源数据、防火信息以及卫星遥感等数据资源，以及成熟的3S技术、计算机技术，汇集防火信息管理、实时监控、指导扑救、提前测报、灾后补救处理为一体的综合应用体系。 论文首先概括的介绍了森林防...As the largest and the most important ecological system in the natural ecological system, forest ecological system is also the foundation for sustainable development. Forest ecological system is an indispensable for economic development, and more and more people realize the irreplaceable role forest ecosystem. Forest protection is to prevent the forest from destruction, and to reduce the loss of f...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201323160

Measurement of Sudan Dyes and Vitamins with HPLC and Online Photochemical Derivatization - Fluorescence Detection

光化学衍生是基于物质吸收一定波长的紫外或可见光辐射而引起的光化学反应而建立的一种分析技术。在线光化学衍生法相比传统的化学衍生有其独特的优势与特点，如对环境友好、操作简便、易实现自动化等，其与荧光分析法的结合大大拓展了荧光分析的应用范围，同时也为许多物质的低含量测定提供了新的技术，在药物分析、环境样品分析及复杂生物样品分析方面显示出广阔的应用前景。因此积极开拓适合该方法的目标物，或增强方法的实用性是具有重要的意义。本研究针对苏丹红和维生素的高效液相色谱（HPLC）分离–在线光化学衍生–荧光光谱测定方法进行了研究，并应用于实际样品的测定。研究论文分为四章： 第一章介绍了光化学衍生分析法的原理...Photochemical derivatization (PCD) is a technique for analyte transferring or chemical species reforming based on the light irradiation induced chemical reaction. Online photochemical derivatization has many advantages, such as environment-friendly, easily control and automation, compared with ordinary chemical derivatization. This technique has greatly expanded the application of traditional mole...学位：理学硕士院系专业：海洋与环境学院海洋学系_海洋化学学号：2242008115147

Determination of four Sudan dyes in chili oil by high performance liquid chromatography with on-line photochemical derivatization and fluorescence detection

建立了在线光化学衍生、荧光检测、高效液相色谱(HPlC)测定辣椒油中苏丹红Ⅰ、Ⅱ、Ⅲ和b的方法。以乙腈-水为流动相,采用梯度洗脱方式在Sb-C18色谱柱上分离。用实验室自制的程序控制时间/光强光化学反应器作为在线衍生装置,优化了光衍生反应的条件和荧光检测条件。3种不同加标浓度下,辣椒油样品中4种苏丹红染料的加标回收率为81.3%~100.4%。加标水平为0.8 Mg/kg下荧光信号强度的相对标准偏差(rSd,n=6)为2.6%~3.8%。苏丹红Ⅰ、Ⅱ、Ⅲ和b的检出限(lOd)和定量限(lOQ)范围分别为0.009~0.054 Mg/kg和0.030~0.181 Mg/kg,优于传统的HPlC分离、二极管阵列检测器检测方法。该方法具有简单、灵敏、选择性好的特点,适用于食品样品中苏丹红的常规分析。A method for the measurement of Sudan Ⅰ,Sudan Ⅱ,Sudan Ⅲ and Sudan B in chili oil using high performance liquid chromatography(HPLC) with on-line photochemical derivatization and fluorescence detection has been developed.The Sudan dyes were separated on an SB-C18 column in a single run by the mixed mobile phase of acetonitrile-water with a gradient program.A laboratory-built time/energy programmed photochemical reactor(PCR) with an ultraviolet mercury lamp was installed between a photodiode array detector(PDA) and a fluorescence detector(FLD),and it was applied to convert the non-or weakly fluorescent Sudan dyes into fluorescence emission components.The photochemical derivatization conditions and fluorescence detection parameters have been investigated and optimized.The recoveries of the standards spiked in real chili oil samples for all the dyes were 81.3%-100.4%.The relative standard deviations(RSDs,n=6) of the fluorescence signal intensity at the spiked level of 0.8 mg/kg were 2.6%-3.8%.The limits of detection(LODs) were in the range of 0.009-0.054 mg/kg and the limits of quantification(LOQs) were 0.030-0.181 mg/kg,which were better than those of the commonly used HPLC coupled with PDA.The developed method which is simple,sensitive,and selective can be applied to the routine analysis of Sudan dyes.美国Agilent公司高等学校研究基金项

The calculation results of the cyclic subgroup of the symmetry group

计算出S6,S7,S8,S9,S10,S11的循环子群,并给出其共轭分类.Calculated the cyclic subgroup of 6 7 8 9 10 11 S,S,S,S,S,S,and gave the conjugate classification

LARGE-SCALE EXPOSITION PLANNING AND MANAGEMENT OPTIMIZATION BASED ON VISITORS' BEHAVIOR SIMULATION:A CASE STUDY of QINGDAO INTERNATIONAL HORTICULTURAL EXPOSITION 2014

2014年青岛世园会参观人次众多,需要对参观者行为进行模拟分析,以保证活动安全,提升游客体验。研究提出了通过行为模拟支持规划评价、预警及对策的技术框架。利用路径调查与陈述偏好调查获得参观者行为数据并建立模型,进而在多个情景下对个体行游轨迹进行了模拟仿真,分析预测了参观者排队、密度等参数的时空分布情况。在针对不同类型的评价对象提出各自评价指标的基础上,从模拟结果中辨识可能存在的问题,并从规划与管理两方面提出预警及优化对策。研究证明了对大型展会活动开展参观者行为模拟的技术框架的可行性,其结果对本次世园会具有一定的实践指导意义。It is necessary to simulate visitors' behavior in Qingdao International Horticultural Exposition 2014 for security and high-quality visitor experience due to the huge estimated pedestrian volume.This paper proposes a technical framework in purpose of supporting the assessment, early warning as well as countermeasures based on behavior simulation.Visitors' activity data are collected through a route choice survey and the informants' reported preference, based on which the behavior models are estimated.Visitors' trajectories under several scenarios are simulated, together with the spatio-temporal distributions of visitors' density and queuing behaviors.Criteria are proposed to evaluate each simulated object, based on which indexes are set up, used to identify problems that are likely to happen in the real exposition.In the end, the paper proposes early warnings and countermeasures of both planning and administration.The simulation framework is demonstrated to be feasible and valuable for the exposition.国家自然科学基金项目“基于行为分析的商业综合体空间优化方法研究”的部分成

Figures' Cultural Implication Correspondence Between Chinese and English:A Key To Translating Figurative Expressions

同样的喻体在不同的文化中所传递的形象信息往往不同。实现原文喻体与译文喻体的内涵对接是翻译比喻性词语的有效方法。对接的原则是源语的喻体和目的语的喻体必须都传递一致的形象内涵。英汉(汉英 )翻译比喻内涵信息对接的前提在于 :译者能够找准与源语比喻中的喻体在目的语中相对应的文化负荷喻体 ,而不是表象的对应词The same figure may convey different image information in different culture. The implication correspondence of figures in source language with that in target language is an effective method for translating figurative expressions. The principle of this correspondence in C E translation is that figures in Chinese and figures in English should convey the same image information. Translators must learn to find correct culturally-loaded figures in English rather than literally-correspondent ones for the figures in Chinese if they want to translate figurative expressions well

The comparison of water balance in millet fields between terrace and flatland under dryland farming on the loess hill-gully region

依据田间试验资料,对比研究了黄土丘陵沟壑区川地和山地梯田两种土地类型条件下谷子水量平衡过程的差异。结果表明,川地谷子生育期总耗水量为544.1mm,山地为468.4mm,前者是后者的1.16倍;谷子全生育期日均耗水量川地为3.30mm/d,山地为2.76mm/d;山地谷子的水分利用效率(WUE)还略高于川地谷子。山地土壤含水量低以及叶面积指数等的不同是引起山地ET/E0偏低的主要原因

Similarities and differences of water balance among cropland, grassland and woodland in the Loess Plateau

水量平衡是说明生态系统功能和特征的重要指标之一。在黄土高原,降水通常是土壤水分的唯一来源,农、林、草地等不同土地利用类型在对土壤水分的利用时段、深度、利用率、水分的收支比以及土壤干燥化特征等方面存在着较大差异。水量平衡计算时,土壤深度农地通常需取到2m,多年生草地取到5m,林地则需到5m以下

Spatiotemporal variation of soil moisture in a small watershed of loess hilly region.

采用定位监测法,对2002—2005年黄土丘陵区小流域土壤水分的时空动态规律及其主要影响因素进行了分析.结果表明,研究区年均土壤水分剖面呈倒"L"型,水分最低点出现在1.0m深处.表层(0~0.2m)和下层(2.4m以下)土壤水分年际间的差异达显著水平,而季节间的显著差异则表现在土壤表层和中层(1.0~2.4m);干旱年的降水不足显著提高了中、下层土壤水分的空间变异性,而丰水年的降水补充作用则显著降低了上层土壤水分的空间变异性,对中、下层土壤水分变异的影响不大.坡向对土壤水分变异的影响最大,其次是土地利用类型,坡位的影响最小.在干旱年或每年雨季开始时,坡向对土壤水分的影响随土层的加深而减弱,土地利用类型的影响则随之增强;在丰水年或每年雨季结束时,土地利用类型只对上层土壤水分状况具有显著影响,且其影响程度小于坡向的影响

基于4自由度操作臂无冲击轨迹规划及动力学仿真分析

在机器人操作臂的研究过程中，其运动轨迹规划及动力学分析是重要部分。针对验电及架设接地线4自由度操作臂的结构特点，采用拉格朗日法建立了动力学模型，并进行了动力学分析，在4阶多项式规划的基础上提出了无冲击轨迹规划。利用Matlab中的Simulink模块得到各关节的力矩、力随时间变化的曲线。运用Adams软件对其进行动力学仿真，得到各关节的力矩、力仿真曲线；与Simulink计算出来的曲线进行对比，确定了动力学分析的正确性，为结构设计和系统控制奠定了基础