杏林湾水库水质富营养化评价

以1999年12月至2000年10月杏林湾水库调查资料为基础,利用浮游植物群落指标、营养状态指数和理化参数指标对杏林湾水库的营养水平进行评价.结果表明,杏林湾水库浮游植物密度年均达3456.77×104个/L,平均TSI为67,杏林湾水库属于蓝-硅藻型富营养型水库.     

厦门同安湾牡蛎养殖容量的估算

根据同安湾水质、污染源调查数据及相关研究结果,以COD为污染因子,建立收支养殖容量模型,并从同安湾污染物容纳量的角度对同安湾的牡蛎养殖容量进行综合估算.     

东海区鲳鱼、小黄鱼资源量及其持续渔获量的估算

根据1996-2009年对浙江海洋捕捞作业方式的调查监测数据及生物学取样和测定数据,结合渔业统计资料,运用体长股分析法(LCA,Length based Cohort Analysis)和最大持续渔获量模型(Schaefer模型和Fox模型),分别对银鲳的资源量和小黄鱼的最大持续渔获量(MSY)进行估算.计算结果为:2005-2006东海区银鲳的平均资源量(扣除叉长130 mm以下幼鱼)为1 374.77×106尾、19.38×104 t,初始资源量(最大资源量)为2 609.20×106尾、36.79×104 t,最大持续渔获量为14.4×104t.以1996-2009年帆张网和2001-2009年双拖网的监测资料,按Schaefer模型和Fox模型分别估算的东海区小黄鱼最大持续渔获量(MSY)为12.96×104～14.08×104 t(平均13.35×104 t).     

杏林湾水库水质的理化特性

1999年10月至2001年10月对杏林湾水库进行了水质理化特性的周年季节调查,结果表明:水库平均水温20.5℃,pH值平均为7.8,呈微碱性,透明度为36.8cm,碱度平均为43.63mg·L-1,溶氧为9.86mg·L-1,水中磷为0.10mg·L-1,无机氮为2.43mg·L-1,化学耗氧量为8.48mg·L-1.多数理化因子周年中出现明显的季节变化,在平面上也有差异,但差异不明显.杏林湾水库水质的化学耗氧、氨态氮和亚硝态氮含量超过备用水源(为Ⅱ类水)的标准.     

野生与养殖褐牙鲆亲鱼营养学分析与繁殖力的研究

比较了野生与养殖褐牙鲆(Paralichthys olivaceus)亲鱼卵、肝脏及肌肉营养学成分及繁殖力,以分析其繁殖阶段的营养需求及繁殖力的差异.结果显示:野生未成熟、野生成熟、普通养殖与维生素A、C、E营养强化的卵中粗蛋白含量分别为69.95%、74.35%、54.69%和67.30%,粗脂肪含量分别为17.88%、16.32%、19.83%和17.11%,野生亲鱼卵中粗蛋白含量显著高于养殖亲鱼(P0.05),粗脂肪含量差异不显著(P0.05).野生未成熟亲鱼肝脏中粗蛋白含量显著高于野生成熟亲鱼和养殖亲鱼(P0.05),粗脂肪含量显著低于野生成熟亲鱼和养殖亲鱼(P0.05).野生亲鱼肌肉中粗脂肪含量显著低于养殖亲鱼(P0.05).野生未成熟、野生成熟、普通养殖和营养强化亲鱼的绝对繁殖力分别为1.88×106、2.40×106、0.68×106和1.38×106(粒),相对繁殖力分别为422、703、349和538(粒/克净体重),野生亲鱼的繁殖力显著高于养殖亲鱼(P0.05),营养强化显著提高了养殖亲鱼的繁殖力(P0.05).     

采用混合像元分解的水库面积提取及变化监测

利用Landsat-5 TM,Landsat-7 ETM+和Landsat-8 OLI遥感影像数据和高空间分辨率(1.14,0.54 m)的Google Earth^TM地面实况图进行水库面积检测与变化监测的技术研究.采用完全约束最小二乘法混合像元分解(FCLS)方法提取不同水库水体信息,并与常用水体指数法及支持向量机(SVM)分类法进行比较,利用多时相FCLS方法监测厦门杏林湾水库2006-2014年间的面积动态变化.结果表明:基于FCLS的方法比NDWI等水体指数方法更能准确地获取水库水体面积大小及其变化信息.     

利用水文法分析汾河水库上游的减沙效益

以汾河水库上游的降雨、径流、输沙和水库泥沙淤积量等资料为基础,用水文法分析计算了汾河水库上游水土保持措施中的减沙效益,并对减沙效益进行了合理修正.研究表明,治理期间(1998-2004年)流域平均降水量比基准期(1958-1972年)减少4.9%,水库来水量减少38.5%,水库年平均减沙量为1005×104t.其中由于水土保持治理,年平均减沙775×104t,减沙率50.6%.     

福建闽南沿海翡翠股贻贝鳃细胞微核率的研究

以翡翠股贻贝(Pernaviridis(linnaeus))鳃组织为实验材料,调查了福建闽南沿海4个不同养殖区(杏林马銮湾、火烧屿、同安湾和东山东沈)的微核率.结果表明,这4个海区的翡翠股贻贝鳃细胞微核率依次为:同安湾>东山东沈>杏林马銮湾>火烧屿.其中,微核率最高的同安湾为2.2×10-3,最低的火烧屿为1.23×10-3.其结果与前人在法国沿岸和威尼斯流域调查的结果1.8×10-3～5.3×10-3相比,微核率较低.说明目前这4个海区水体中所含遗传毒性污染物的量并不太高,但其潜在的危害仍不容忽视.     

基于珍珠龙胆石斑鱼池塘网箱养殖的生态养殖容量估算

为研究黄三角地区珍珠龙胆石斑鱼池塘网箱养殖的适宜密度,并估算池塘生态养殖容量,以体重为400 g的实验鱼为研究对象,在5 m×5 m×1 m浮式网箱中进行了84 d的养殖实验(300、400、500、600尾/箱).结果显示:(1)随着养殖密度的升高,实验鱼的末均重、增重率(WGR)、特异增重率(SGR)、蛋白质沉积率(PDR)均先升后降,400尾/箱和500尾/箱组显著高于其他2组(P 0. 05),但两组之间差异不显著(P 0. 05);饲料系数(FCR)、单位体重粗蛋白排放量(PDP)先降后升,400尾/箱和500尾/箱组显著低于其他两组(P 0. 05);分别以WGR、SGR、PDP为评价指标,25 m3网箱中珍珠龙胆石斑鱼的最佳密度分别为450、439、453尾/箱.(2)以非离子氨排放标准为评价指标,珍珠龙胆石斑鱼的最佳生态养殖容量为2 441～2 611尾/km2.(3)以凯氏氮排放标准为评价指标,珍珠龙胆石斑鱼的最佳生态养殖容量为1 406～2 109尾/km2.结合黄三角地区池塘现状,推荐网箱养殖密度为450尾/箱,适宜放置的网箱数量为6～9只/km2(4～6只/亩),生态养殖容量为1 758～2 526尾/km2.     

应用体长股分析法估算东海海鳗资源量

海鳗是一种重要的渔业资源,中国海鳗的最高渔获量达到了31.96×104t(2004年),东海区海鳗渔获量最高达到17.67×104t以上(2004年),其中浙江省海鳗最高渔获量为9.02×104t。根据体长股分析法对海鳗资源量进行初步评估,为渔业管理提供参考,研究样品1394尾来自2002～2005年浙江近海拖虾、单拖、帆张网、流刺网等作业的渔获。估算的结果:海鳗自然死亡系数为M=0.15,捕捞死亡系数为F=1.3;东海区海鳗的平均资源量为12.36×104t,平均资源尾数为308.28×106尾,初始资源量为23.41×104t,最大资源尾数为583.99×106尾。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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