Cultivation of marine sponges

Sponges are the most primitive of multicellular animals, and are major pharmaceutical sources of marine secondary metabolites. A wide variety of new compounds have been isolated from sponges. In order to produce sufficient amounts of the compounds of the needed, it is necessary to obtain large amount of sponges.The production of sponge biomass has become a focus of marine biotechnology.     

卫星数字图象处理与制图分析——以京津及邻区1:25万影象图的处理分析为例

利用计算机进行图象处理和彩色制印,编制了京津及邻区1:25万影象图。采用经数字处理的图象和制图分析等编改工艺,取得了高质量低成本的效果。     

REDUCED GROWTH IN HYBRID TILAPIA (OREOCHROMIS MOSSAMBICUS×O. NILOTICUS) AT INTERMEDIATE STOCKING DENSITY

ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｍｏｓｔｓｔｕｄｉｅｓ,ｇｒｏｗｔｈｒａｔｅｏｆｆｉｓｈｗａｓｆｏｕｎｄｔｏｄｅｃｒｅａｓｅｗｉｔｈｉｎｃｒｅａｓｉｎｇｄｅｎｓｉｔｙ ,ｅｓｐｅｃｉａｌｌｙｗｈｅｎｔｈｅｄｅｎｓｉｔｙｗａｓａｂｏｖｅａｃｒｉｔｉｃａｌｐｏｉｎｔ (ＲｅｆｓｔｉｅａｎｄＫｉｔｔｌｅｓｉｎ ,1 976;Ｒｅｆｓｔｉｅ,1 977;Ｔｒｚｅｂｉａ ｔｏｗｓｋｉｅｔａｌ.,1 981 ;ＶｉｊａｙａｎａｎｄＬｅａｔｈｅｒｌａｎｄ ,1 988) .Ｈｏｗｅｖｅｒ,ｉｎａｃｏｌｄ ｗａｔｅｒｃａｒｎｉｖｏｒｏｕｓｆｉｓｈ ,ｔｈｅＡ…     

A High Precision Comprehensive Evaluation Method for Flood Disaster Loss Based on Improved Genetic Programming

Precise comprehensive evaluation of flood disaster loss is significant for the prevention and mitigation of flood disasters. Here, one of the difficulties involved is how to establish a model capable of describing the complex relation between the input and output data of the system of flood disaster loss. Genetic programming （GP） solves problems by using ideas from genetic algorithm and generates computer programs automatically. In this study a new method named the evaluation of the grade of flood disaster loss （EGFD） on the basis of improved genetic programming （IGP） is presented （IGP-EGFD）. The flood disaster area and the direct economic loss are taken as the evaluation indexes of flood disaster loss. Obviously that the larger the evaluation index value, the larger the corresponding value of the grade of flood disaster loss is. Consequently the IGP code is designed to make the value of the grade of flood disaster be an increasing function of the index value. The result of the application of the IGP-EGFD model to Henan Province shows that a good function expression can be obtained within a bigger searched function space; and the model is of high precision and considerable practical significance. Thus, IGP-EGFD can be widely used in automatic modeling and other evaluation systems.     

No Higher Criticism of the Bianchi-corrected Wilkinson Microwave Anisotropy Probe data

Higher Criticism (HC) has been proposed by Donoho & Jin as an effective statistic to detect deviations from Gaussianity. Motivated by the success of the Bianchi VII_h model in addressing many of the anomalies observed in the Wilkinson Microwave Anisotropy Probe ( WMAP ) data (Jaffe et al.), we present calculations in real and in wavelet space of the HC statistic of the Bianchi-corrected WMAP first-year data. At the wavelet scale of 5°, the HC of the WMAP map drops from a value above the 99 per cent confidence level (c.l.) to a value below the 68 per cent CL when corrected by the Bianchi template. An important property of the HC statistic is its ability to locate the pixels that account for the deviation from Gaussianity. The analysis of the uncorrected WMAP data pointed to a cold spot in the Southern hemisphere, centred at   l ∼ 209°, b ∼−57°  . The HC of the Bianchi-corrected map indicates that this spot remains prominent, albeit at a level completely consistent with Gaussian statistics. Consequently, it is debatable how much emphasis should be placed on this residual feature, but we consider the effect of modestly increasing the scaling of the template. A factor of only 1.2 renders the spot indistinguishable from the background level, with no noticeable impact on the results published in Jaffe et al. for the low- l anomalies, large-scale power asymmetry or wavelet kurtosis. A trivial interpretation would be that the Bianchi template may require a small enhancement of power on scales corresponding to the wavelet scale of 5°.     

RELATIVE MOTION AND DEFORMATION OF PACIFIC PLATE FROM SPACE GEODESY

1　IntroductionThroughoutthegeologicalhistory ,almostallthetectonicplateactivities,suchasearthquakes,volcaniceruption ,andmountainbuilding ,takeplaceatactiveplateboundaries.Forexample,approxi mately 90 percentoftheearthquakesoccuratactiveplateboundaries[1 - 4 ] ,andthehighestmountainsofTibetandAndesresultfromthecontinualcollisionbetweenIndiaandAsia ,NazcaandSouthAmericaplates,respectively .Aplateboundaryisafracturethatseparatesaplatefromanother;theneighboringplatesmoverelativetooneanotherin…     

一种签字工作流的定义方法研究

对签字的基本模型进行了总结，并提出一种有足够建模能力、便于用户理解与计算机实现的签字过程定义方法——带条件的链表描述法。     

CONSIDERATION OF HYDRODYNAMIC CHARACTERISTICS,SEDIMENTS & ENVIRONMENTAL PROBLEMS OF MUDDY COAST IN THE CONSTRUCTION OF LIANYUNGANG HARBOUR

After nearly 20 years of construction,we have successfully solved a series of hydrologic sedimentaryand environment problems encountered during the construction of the big deep water harbour inLianyungang which can now accommodate ships of 50000 tonnage.With the economic development,the channel of 50000 tonnage will be built soon, and of 100000 tonnage is under planning. Theconstruction of the international container shipping hub at the harbour is being accelerated in anticipationof the opening of the second Eurasian land bridge.The future development of the harbour will givegreat impetus to the local economy of Lianyungang City and make it an international city.     

天体周日视运动过程中天体高度的变化率

天体周日视运动过程中天体的高度不断变化，对天体观测的质量有直接的影响，通过分析天体周日视运动过程中天体高度的变化率，给出不同观测时机进行天体高度观测的特性，并用曲线图的形式给出天体高度变化率的极值点和零值点。航海人员可以从更深的层次认识天体周日视运动的规律，指导天文定位过程中对天体高度的观测。