CORSRTD技术在土地利用数据调查中的应用

土地利用问题,对于协调人地关系、发展国民经济有着重要的作用。因此,为了合理利用土地,保证以集约利用为主与适量的耕地面积相结合,对土地利用数据进行调查有着至关重要的作用。本文利用CORS RTD技术对土地利用数据调查中的应用进行研究,对CORS RTD测量结果相对于RTK测量结果作为已知值的点位误差、测量中误差。并且认为随着测量面积的增大CORS RTD的面积测量精度逐渐提高。由此可见,利用CORS RTD技术进行面积测量保证了土地资源调查的面积精度要求。     

薄层自流式光生物反应器研制及微藻培养效果评价

【目的】针对跑道池光生物反应器光照比表面积小、产率低、耗水量大等问题,设计一种新型薄层自流式光生物反应器。【方法】使用Solidworks软件进行三维建模设计,建立该新型反应器的微藻培养系统,并与跑道池光生物反应器进行微藻培养中试对比评价试验;建造一套薄层自流式反应器的微藻大规模培养系统,并以同株栅藻(Scenedesmus sp.)为培养藻种,进行4批次的培养试验,评价该反应器的微藻培养效果。【结果】所设计薄层自流式反应器光径减小,光照比表面积,藻液混合程度提高;中试试验结果表明,薄层自流式反应器中栅藻的生长速率明显高于同期跑道池光生物反应器,生物质浓度显著高于跑道池反应器,单位面积产率(每天单位占地面积的产量)升高13%,薄层式反应器的耗水量约低于跑道池反应器6倍。大规模培养试验表明,薄层自流式反应器的微藻生物质产率明显高于跑道池反应器,微藻生物质产率单日高达0.86 g·L^-1·d^-1,占地面积产率达43.5 g·m^-2·d^-1,最终生物质浓度达2.31 g·L^-1,远高于跑道池光生物反应器最高生物质质量浓度(约0.01~0.6 g·L^-1)。【结论】薄层自流式光生物反应器一定程度上克服了跑道池光生物反应器的缺点,收获微藻的生物质产率和浓度高。     

ENVIRONMENTAL CHANGE AND ITS IMPACTS ON HUMAN SETTLF, MENT IN THE CHANGJIANG RIVER DELTA IN NEOLITHIC AGE

Dating data, altitude of Neolithic sites, climatic changes from sedimentary records and previous research results were collected and analyzed to detect possible connections between climatic changes and human activities in the Changjiang River Delta in the Neolithic Age. The results indicated that hydrological changes greatly impacted the human activities in the study region. Low-lying geomorphology made the floods and sea level changes become the important factors affecting human activities, especially the altitude change of human settlements. People usually moved to higher places during the periods characterized by high sea level and frequent floods to escape the negative influences from water body expansion, which resulted in cultural hiatus in certain profiles. However, some higher-altitude settlements were not the results of climatic changes but the results of social factors, such as religious ceremony and social status. Therefore, further research will be necessary for the degree and types of impacts of climatic changes on human activities in the study area at that time.     

我国海岛县旅游竞争力综合评价研究

为科学评价我国海岛县旅游发展状况以及助力海岛高质量发展，文章构建海岛县旅游竞争力评价指标体系，并利用随机森林算法和熵值法对全国海岛县的旅游竞争力进行测算，发现旅游总收入、全年旅游人数、人均GDP、一般公共预算支出以及客运周转量5项指标对海岛县旅游竞争力产生主要影响；深入分析我国海岛县旅游竞争力差异的形成机理，利用反距离权重插值法估计海岛县周边海岛的旅游竞争力，并对提高海岛县旅游竞争力提出建议。     

Input data resolution‐induced uncertainty in watershed modelling

The temporal‐spatial resolution of input data‐induced uncertainty in a watershed‐based water quality model, Hydrologic Simulation Program‐FORTRAN (HSPF), is investigated in this study. The temporal resolution‐induced uncertainty is described using the coefficient of variation (CV). The CV is found to decrease with decreasing temporal resolution and follow a log‐normal relation with time interval for temperature data while it exhibits a power‐law relation for rainfall data. The temporal‐scale uncertainties in the temperature and rainfall data follow a general extreme value distribution and a Weibull distribution, respectively. The Nash‐Sutcliffe coefficient (NSC) is employed to represent the spatial resolution induced uncertainty. The spatial resolution uncertainty in the dissolved oxygen and nitrate‐nitrogen concentrations simulated using HSPF is observed to follow a general extreme value distribution and a log‐normal distribution, respectively. The probability density functions (PDF) provide new insights into the effect of temporal‐scale and spatial resolution of input data on uncertainties involved in watershed modelling and total maximum daily load calculations. This study exhibits non‐symmetric distributions of uncertainty in water quality modelling, which simplify weather and water quality monitoring and reducing the cost involved in flow and water quality monitoring. Copyright © 2011 John Wiley & Sons, Ltd.     

基于GIS的羌塘高原冰川系统雪线场的建立及其空间分布特征

根据羌塘高原冰川系统测量雪线高度(ELAh)与冰川平均高度(Hm e)之间存在较好的线性关系,计算了其所有冰川的雪线高度ELAhc。量算的ELAh与计算的ELAhc十分接近,整个羌塘高原的差值(ELAh-ELAhc)平均仅为0.16 m,说明采用这种方法计算的雪线高度ELAhc是可信的。通过对比发现:在编绘雪线高度场时,将冰川系统内相邻冰川分组平均而生成的雪线场克服了地形雪线的影响,比未进行分组平均的雪线场更为美观整洁,规律性也很明显。羌塘高原冰川系统雪线场分布具有如下特征:(1)从南向北,雪线逐渐降低;(2)从东到西,雪线随之升高。从总体上来看,羌塘高原雪线从西南向东北逐渐降低的趋势,但变幅不大,多数在5 700 m以上,但最高值不在气温最高的南部或降水最少的西北部,而在隆格尔山,高达6 000 m以上,不仅是本区和青藏高原内陆水系雪线最高的,也是迄今所知北半球最高雪线所在地。其次分别为波波嘎屋峰、土则岗日和藏色岗日附近,最低值在金阳岗日附近,这是本区降水量从东南向西北减少、气温由南向北降低对雪线综合作用的结果。     

一个基于AOP的Bean锁算法

提出了一种基于Aspect Oriented Programming（AOP）的Bean锁算法，通过将Bean锁抽象成该问题的一个方面（Aspect），通过AOP引擎使用该算法动态生成加锁Bean，大大降低Bean锁代码的重复量，并在基本不影响性能的前提下，提高代码复用率。通过使用基于AOP的Bean锁，Bean可以完全消除锁代码，从而提高Bean代码的可维护性。     

实施创新教育培养高素质创新人才

世界科技飞速发展的今天，实施创新教育是时代的呼唤，是教育改革与发展的方向，是素质教育的必然。创新教育是探索精神、综合能力、创造意识与创造能力的培养，改变传统教育观念，加强教育改革，改革教学方法，营造有利于创造性人才成长的环境是实施创新教育的有效途径。     

Examination of Daytime Length''''s Influence on Phytoplankton Growth in Jiaozhou Bay, China

1　INTRODUCTIONSystematicstudyisusefulforhumanvisualizationandcomprehensionofanetworkofcomplicatedcompo nentsandprocessesinvolvingfrequentenergyflow ,consideringenergyasthebasisofbothstructureandprocess (Automa ,1 993) .Energylanguageisaconceptfordepictingasysteminwhichallphenomenaareac companiedbyenergytransformation .Thefunctionoftheecosystemovertheworlddependsontheenergyfixationbymarineplantphotosynthesis ,mostofthemarefixedbymicrophytoplanktonnearseasurfaceexposedtosunlight (Niebaken …     

秦巴山区环境污染及治理

对秦巴山区的开发利用，各种工业、厂矿在生产过程产生的“三废”(废气、废水、废渣)未经处理即任意排放，造成河流水质恶化，影响着秦岭的环境质量，提醒人们及早关注环境生态变化，加强环保意识，保护秦巴山区的生态平衡。