条纹斑竹鲨耗氧率的研究

对条纹斑竹鲨耗氧率的昼夜变化进行了研究,并对其在不同水温、不同规格条件下的耗氧率和窒息点进行了测定.结果表明:1)条纹斑竹鲨的耗氧率昼夜变化并不明显,但具有明显的高峰和低谷,低谷值出现在02∶00和09∶00,其平均值为0.110 mg/(g.h),明显低于日平均耗氧率0.213 mg/(g.h);耗氧率高峰期出现在15∶00和21∶00,其平均值为0.462 mg/(g.h),明显高于日平均耗氧率;2)平均体重为99.29 g的条纹斑竹鲨,耗氧量(Yc)和耗氧率(Ycr)随着温度(T)的升高,均呈上升态势,并与水温呈幂函数关系,其关系式分别为:Yc=0.542T1.076,Ycr=2.576T1.335;3)在水温为22.5~24℃条件下,条纹斑竹鲨的耗氧量(Yc)随体重(W)的增大而增大,耗氧率(Ycr)则相反,随体重增加而减小,但与体重均呈幂函数关系,其关系式分别为:Yc=3.148W0.416,Ycr=3.192W-0.587;4)在水温为22.5~24℃时,平均体重在50.00~466.50 g的条纹斑竹鲨,其窒息点范围为0.176~0.608 mg/L,而其窒息点与水温的关系并未显示出规律性.     

斑点叉尾鱼苗阶段耗氧率和窒息点的测定

在实验室内测定 30尾斑点叉尾鱼苗的群体耗氧率和窒息点。鱼苗平均体长 2 .1 1cm,平均体重 0 .1 0 g。试验用水为曝气 2 4 h以上的自来水 ,水的碱度 2 .60 mg N/ L,硬度 1 .1 5mg N/ L,p H值 7.2 ,溶氧 5.86mg/ L。结果表明 ,在水温 2 8.2℃～ 2 8.5℃时的斑点叉尾鱼苗的耗氧率为 0 .52 33mg/ g·h,耗氧量为 0 .0 544毫克 /尾·小时 ,窒息点为 0 .52 2 6mg/L。斑点叉尾的耗氧率呈现出明显的昼夜变化     

月鳢耗氧率与窒息点的初步研究

对月鳢的耗氧率和窒息点进行了初步研究,结果表明: ( 1)无论是水呼吸还是气呼吸,月鳢的耗氧率均随试验鱼个体增大而降低,随水温或气温的升高而升高; ( 2) 月鳢夜间的平均耗氧率略高于白天平均耗氧率; ( 3) 月鳢的窒息点也是随鱼体增大而降低,随水温升高而升高; ( 4) 气呼吸在月鳢的呼吸活动中占有较重要的位置.     

中华绒螯蟹亲蟹的标准代谢研究

对中华绒螯蟹亲蟹的耗氧率、二氧化碳排出率及氨氮排泄率进行了测定 ,并研究了亲蟹的能耗率及能源物质的供能比。结果表明 ,体重为 (5 6 .99± 6 .4 2 )g亲蟹 ,在水温 (2 0± 0 .5 )℃时的耗氧率为 (0 .2 77± 0 .0 5 9)mg·g- 1·h- 1,CO2 排出率为 (0 .32 1± 0 .0 78)mg·g- 1·h- 1,氨氮排泄率为(2 .790± 0 .6 43) μg·g- 1·h- 1,能耗率为 (4.2 4± 0 .92 )J·g- 1·h- 1;亲蟹代谢中蛋白质、碳水化合物和脂肪提供的能量比为 7.4∶4 1.2∶5 1.4 ;其能耗率 (R0 )与体重 (W )呈负相关 ,其关系式为R0 =1.76 32W- 0 .54 0 7。     

鲑点石斑鱼幼鱼耗氧率的研究

应用测定流水中溶氧量的方法,对鲑点石斑鱼幼鱼耗氧率进行研究,结果表明：鲑点石斑鱼幼鱼耗氧率随水温的升高而升高,鱼平均体重２５ ．６２５ ～２８ ．１１１ ｇ ,水温１７ ．６ ° Ｃ 时,按鱼体重计（ 下同） ,耗氧率为１ ．５１７ μｇ／（ｇ·ｍｉｎ） ;３３ ．４ ° Ｃ 时,耗氧率达７ ．２３０ μｇ／（ｇ·ｍｉｎ） ．水中溶氧量对鲑点石斑鱼耗氧率的影响只在一定的范围内起作用,在水温２６ ．０ ～２７ ．３ ° Ｃ、盐度３３ ．６ 、鱼体重２８９ ．５０ ～３３８ ．９８ ｇ 条件下,溶氧量低于１ ．８ ｍｇ／ Ｌ 时,耗氧率随溶氧量降低而急剧下降;高于１ ．８ ｍｇ／ Ｌ时,耗氧率几乎不受水中溶氧量的影响．溶氧量（ Ｘ） 与号氧率（ Ｙ） 的关系可以用 Ｙ＝ ０ ．１９８ ４ Ｘ３ －１ ．７３４ ８ Ｘ２ ＋ ４ ．８６９ ３ Ｘ－ １ ．５４９ 表示．鲑点石斑鱼的耗氧率有明显的昼夜变化,在水源ｐ Ｈ８ ．１ 、盐度３３ ．６９ 、水温２５ ．８ ° Ｃ 条件下,鱼平均体重２１ ．４１１ ｇ ,１７ ：００ 耗氧率最高,为６ ．１２７ μｇ／（ｇ·ｍｉｎ） ,０９ ：００ 耗氧率最低,为３ ．０５２ μｇ／（ｇ·ｍｉｎ） ．与测定昼夜变化的各项条件相同时,鲑点石斑鱼在安静状     

斑点叉尾鮰鱼苗阶段耗氧率和窒息点的测定

在实验室内测定30尾斑点叉尾Hui鱼苗的群体耗氧率和窒息点,鱼苗平均体长2．11cm,平均体重0．10g,试验用水为曝气24h以上的自来水,水的碱度2．60mgN/L,硬度1．15mgN/L,pH值7．2,溶氧5．86mg/L,结果表明,在水温28．2－28．5度时的斑点叉尾Hui鱼 耗氧率为0．5233mg/g.h,耗量为0．0544毫克／尾．小时,窒息点为0．5226mg/L,斑点叉尾Hui的耗氧率呈现出明显的昼夜变化。     

体重对大鳍鳠力竭性运动后过量耗氧的影响

过量耗氧（EPOC）是衡量动物无氧代谢能力的重要生理指标,为揭示不同体重鱼类在EPOC方面的适应机制,在25℃条件下对体重范围分别为低于20g、20～30g、30～50g和高于50g的大鳍鳠（Mystus macropterus Bleeker）力竭性运动后EPOC进行了测定。结果显示：实验鱼单位体重的静止耗氧率随体重的增加而显著下降（P〈0．05）,分别为2．44、2．25、2．05和1．71mg·min^-1·kg^-1;力竭运动后实验鱼耗氧率迅速上升,然后缓慢回落到一稳定水平;其力竭性运动后耗氧率峰值出现时间随体重的上升而后延,分别为1．31、1．53、1．89和4．50min;其单位体重的耗氧率峰值随体重的增加而显著下降（P〈0．05）,分别为12．36、11．07、10．27和7．20mg·min^-1·kg^-1,该数值分别为处理前的5．36、5．04、5．23和4．22倍;各体重组耗氧率下降到稳定水平的时间分别为20、20、25和20min,在此时间段高于静止耗氧率水平的耗氧量分别为69．25、64．89、62．15和49．07mg。研究表明大鳍鳠无氧代谢能力随体重的增加而上升。     

温度和规格对扁玉螺耗氧率和排氨率的影响

在实验生态条件下 ,研究了温度对不同个体大小扁玉螺耗氧率和排氨率的影响。实验结果表明 ,在实验温度 ( 1 0～ 35℃ )条件下 ,扁玉螺的个体耗氧率 (R′O) [mg/个·h]和个体排氨率 (R′N) [mg/个·h]与软体部干重 (W)呈正相关 ,而耗氧率 (RO) [mg/g·h]、排氨率 (RN) [mg/g·h]与软体部干重呈负相关 ,二者之间均可用幂函数表示 ;扁玉螺的耗氧率和排氨率均随温度的升高而增加 ,但超过 30℃后 ,耗氧率则下降 ,耗氧率 (RO)、排氨率 (RN)与温度之间呈明显的指数函数关系。不同规格扁玉螺的耗氧率和排氨率的比值 (原子数O :N)在 2 0℃时最大。方差分析表明 ,温度、软体部干重对扁玉螺的耗氧率和排氨率有极显著的影响 (P 相似文献   

网箱养殖大黄鱼和美国红鱼的耗氧率与氮排泄率

对个体重20～250 g的大黄鱼和个体重150～1400g的美国红鱼在不同水温(29.7,15.9,9.7,18.3,26.4℃)条件下的耗氧率和氮排泄率进行了测试分析,结果表明:在相同温度条件下,大黄鱼和美国红鱼的耗氧率和氮排泄率取决于鱼体体重,随着体重的增大,耗氧率和氮排泄率降低;而在相同体重条件下,耗氧率和氮排泄率则取决于水温,即随水温的升高,耗氧率和氮排泄率也随之增高.同时还分析了养殖鱼类的自身代谢对水质的影响.     

水温对日本沼虾耗氧率及鳃组织CAT、SOD活力的影响

在pH 7.11±0.07,基准水温24.0±0.2℃条件下,采用静水停食法开展了水温对日本沼虾(体长4.29±0.32 cm,体质量1.80±0.12 g)存活、耗氧率及鳃组织CAT、SOD酶活力的影响实验。结果表明(:1)48 h内水温12.5℃和32.5℃实验组日本沼虾的死亡率均超过50%,而15～30℃范围内的存活率则为100%(;2)水温22.5～27.5℃范围内,日本沼虾昼均、夜均及各观测时段耗氧率均随水温升高而增大(P<0.05),但耗氧高峰时段和耗氧昼夜节律均未发生改变;(3)48 h内,水温22.5℃和25℃实验组日本沼虾鳃组织SOD活力时序变化步调一致且无差异(P<0.05),各时段观测值均低于27.5℃实验组(P<0.05),低谷期较27.5℃实验组后延12 h;(4)水温22.5～27.5℃日本沼虾鳃组织CAT活力在48 h内均较为稳定,且均随水温升高而显著增大(P<0.05)。     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.