检索结果-南通市图书馆

Journal of Water Resource and Protection 2017年第4期9卷 393-409页

作者： s. V. J. s. s. Rajesh b. s. Prakasa Rao K. Niranjan Dept. of Physics Dr. L. B. College Dept. of Geo-engineering Andhra University College of engineering Department of Physics Andhra University Visakhapatanam Andhra Pradesh India

As a part of the National Water Development Authority (NWDA) proposal, the linking between Pennar and Cauvery is put forth with a single purpose of conserving water to the maximum extent possible. The present study covers with land use/land cover (LU/LC) along the alignment study area 17215.68 sq·km. All the details of these features have been studied using IRs-P6, LIssIII data to analyze the effect of land use and land cover. The land use and land cover data are classified into 9 categories such as crop land, current fallow, forest, plantations, built-up land, water bodies, scrub land, sandy area and others. The total area going to be capsized is 17215.68 sq·km out of which 10105.96 sq·km is proposed command area. The 244 villages have to be rehabilitated due to this canal whereas about 4597 villages will enjoy the fruits of this canal in the form of drinking water, ground water recharge and as an additional source of irrigation as well. The study indicated current fallow land of 5340.14 km2 and 6307.98 km2 of cropland can be brought under cultivation which is more than what NWDA estimated land that can be benefitted.

关键词： Land Use and Land Cover Command Area Rehabilitated IRs-P6 LIss-III

Deriving Ag_3PO_4–CaO composite as a stable and solar light photocatalyst for efficient ammonia degradation from wastewater

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2018年第1期27卷 290-299页

作者： Y.shaveisi s.sharifnia Catalyst Research Center Chem.Eng.Dept.Razi UniversityKermanshah 67149-67246lran

A novel Ag3PO4-CaO composite photocatalyst with enhanced photocatalytic activity was synthesized and utilized for degradation of ammonia from aqueous solution under sunlight. Ag3PO4 was prepared by pre- cipitation method, and the composite of AgjPO4-CaO was prepared via impregnation method. Utilization of eggshell for CaO synthesis provided a cost-effective and environmental friendly way for the hetero- geneous catalyst production. The as-prepared photocatalysts were characterized by FT-IR, FE-sEM, TEM, EDX, UV-vis and PL Results show that the Ag3PO4-CaO samples have excellent photocatalytic perfor- mances in the wide visible-light region. The effect of operating parameters like the content of Ag3PO4 in composite, initial ammonia concentration, pH of solution, catalyst dosage and oxygen supply was investi- gated. The photoeatalyst with 60 wt% content of Ag3PO4 had a high photocatalytic performance, because a low content of Ag3PO4 causes weak light absorption, and the excess amount of it results in serious electron-hole recombination due to the aggregation of AgjPO4 particles. The maximum ammonia degra- dation （about 70%） was achieved in 340 mg/L of ammonia, pH 11, and 1.25 g/L of catalyst in the presence of pure oxygen. In comparison to Ag3PO4, 60 wt% AgjPO4-CaO had a good stability and it could have been easily separated from the solution for recycling.

关键词： Photocatalyst Ag3PO4 CaO Ammonia degradation sunlight

Morphogenetic responses of Populus alba L. under salt stress

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2014年第1期25卷 155-161页

作者： Mejda Abassi Khaled Mguis Zoubeir béjaoui Ali Albouchi Unit of Agrosulvopastoralisme INRGREF

The morphogenetic responses to salt stress of TunisianPopu-lus alba clones were studied in order to promote their plantation in dam-aged saline areas. One year-old plants of threeP. alba clones （MA-104, MA-195 and OG） were subjected to progressive salt stress by irrigation during two consecutive years. The plants were grown in a nursery, inside plastic receptacles containing sandy soil and were irrigated with tap water （control） or 3-6 g/l NaCl solution. During this study, leaf epinasty, elongation rate, vigor, internode length, plant architecture, and number of buds were evaluated. Test clone response was highly dependent on the applied treatment and degree of *** most pronounced alterations were induced under 6g/l of NaCl treatment including leaf epinasty, leaf elongation rate delay, vigor decrease, internode length shortening, and morphogenetic modifications. These responses were less noticeable in the MA-104 clone with respect to the two other clones. The salt effect induced a delay in the leaf elongation rate on the MA-195 and OG clones leading to an early leaf maturity. The vigour and internode length of the MA-104 clone was less affected than the other clones. The OG clone was the most salt-sensitive thus, it developed shorter branches and more buds number than MA-195 and MA-104. The effect of long-term salt stress was to induce early flowering of theP. alba clones which suggests that mechanism of salt accommodation could be developed.

关键词： Poplar salinity leaf elongation vigor internode length,floral bud

Effect of Land Reclamation on Nutrient Distribution in Reclaimed Farmlands Overlying Xuzhou Underground Coal Mines *1

在线全文

学校读者我要写书评

暂无评论

Pedosphere 1998年第2期8卷 155-160页

作者： b．M．KOROMA ZHENGCHUNRONG 等 CollegeofNaturalResourcesandEnvironmentalsciences ZhejiangAgriculturalUniversityHangzhou310029（China

This research was carried out to evaluate the effect of the reclamation procedure with respect to soil fertility and nutrient distribution pattern in the reprecipitated reclaimed soil. Although there was an obvious indication of low levels of essential nutrients in the reclaimed farmlands (organic matter=0.32 g kg -1 ,total N=380.8 mg kg -1 , available P=4.7 mg kg -1 ), compared to the undisturbed farmlands (organic matter=2.5 g kg -1 , total N=1 220 g kg -1 , available P=20.8 mg kg -1 ), the uneven pattern of nutrient distribution was also shown to have been the major limitation to successful reclamation. Further improvement can be achieved through the integration of intensive eco farming systems using proper fertilizer field correction (PFFC) and organic manure for successful reestablishment and management of newly reclaimed farmlands overlying the Xuzhou coal mine subsidence.

关键词： coal mine subsidence hydraulic dredge pump technique land reclamation nutrient distribution

segmentation and classification of high resolution imagery for mapping individual species in a closed canopy,deciduous forest

在线全文

学校读者我要写书评

暂无评论

science China(Technological sciences) 2006年第z1期49卷 128-139页

作者： Timothy A.Warner James b.McGraw Rick Landenberger Department of Geology and Geography West Virginia UniversityMorgantown WV 26506-6300USA biology Department West Virginia UniversityMorgantown WV 26506USA

In this paper we investigate the use of a shadow-based delineation program for identifying segments in imagery of a closed canopy, deciduous forest, in West Virginia, UsA, as a way to reduce the noise associated with per-pixel classification in forested environments. shadows typically cluster along the boundaries of trees and therefore can be used to provide a network of nodes for the delineation of segments. A minimum cost path algorithm, where cost is defined as the cumulative sum of brightness values traversed along the connecting route, was used to connect shadow clumps. To test this approach, a series of classifications was undertaken using a multispectral digital aerial image of a six hectare test site and a minimum cost path segmentation. Three species were mapped: oaks, red maple and yellow poplar. The accuracy of an aspatial maximum likelihood classification (termed PERPIXEL classification) was 68.5%, compared to 74.0% for classification using the mean vector of the segments identified with the minimum cost path algorithm (MEAN_sEG), and 78% when the most common class present in the segment is assigned to the entire segment (POsTCLAss_sEG). by comparison, multispectral classification of the multispectral data using the field-mapped polygons of individual trees as segments, produced an accuracy of 82.3% when the mean vector of the polygon was used for classification (MEAN_TREE), and 85.7% when the most common class was assigned to the entire polygon (POsTCLAss_TREE). A moving window-based post-classification majority filter (POsTCLAss_MAJ5bY5) produced an intermediate accuracy value, 73.8%. The minimum cost path segmentation algorithm was found to correctly delineate approximately 28% of the trees. The remaining trees were either segmented, aggregated, or a combination of both segmented and aggregated. Varying the threshold that was used to discriminate shadows appeared to have little effect on the number of correctly delineated trees, or on the overall accu

关键词： remote sensing, digital forestry, image classification, segmentation.

Mechanical Properties of Living Adherent Cells :Relationship with structure and Function

在线全文

学校读者我要写书评

暂无评论

生物医学工程学杂志 2005年第S1期22卷 9-10页

作者： R. FODIL s. Féréol E. PLANUs V.M. LAURENT b. LOUIs D. IsAbEY Inserm UMR 651 Fonctions Cellulaire et Moléculaire de l'Appareil Respiratoire et des Vaisseaux Equipe Biomécanique Cellulaire et Respiratoire Faculté de Médecine Créteil 94 010 FranceInserm UMR 651 Fonctions Cellulaire et Moléculaire de l'Appareil Respiratoire et des Vaisseaux Equipe Biomécanique Cellulaire et Respiratoire Faculté de Médecine Créteil 94 010 FranceInserm UMR 651 Fonctions Cellulaire et Moléculaire de l'Appareil Respiratoire et des Vaisseaux Equipe Biomécanique Cellulaire et Respiratoire Faculté de Médecine Créteil 94 010 FranceInserm UMR 651 Fonctions Cellulaire et Moléculaire de l'Appareil Respiratoire et des Vaisseaux Equipe Biomécanique Cellulaire et Respiratoire Faculté de Médecine Créteil 94 010 FranceInserm UMR 651 Fonctions Cellulaire et Moléculaire de l'Appareil Respiratoire et des Vaisseaux Equipe Biomécanique Cellulaire et Respiratoire Faculté de Médecine Créteil 94 010 FranceInserm UMR 651 Fonctions Cellulaire et Moléculaire de l'Appareil Respiratoire et des Vaisseaux Equipe Biomécanique Cellulaire et Respiratoire Faculté de Médecine Créteil 94 010 France

Head-on collision between single-and multi-soliton heavy ion acoustic waves in multi-ion plasmas

在线全文

学校读者我要写书评

暂无评论

Plasma science and Technology 2019年第9期21卷 58-72页

作者： M s ALAM M R TALUKDER Department of Mathematics Chittagong University of Engineering and Technology Chittagong-4349 Bangladesh Plasma science and Technology Lab Department of Electrical and Electronic Engineering University of Rajshahi Rajshahi-6205 Bangladesh

Head-on collisions among the single-and multi-soliton’s heavy ion acoustic waves(HIAWs) of multi-ion plasma are studied. The plasma consists of adiabatic positively charged inertial heavy ions, boltzmann energy distributed light ions and kappa energy distributed electrons. The extended poincaré-Lighthill-Kuo(e PLK) method is applied for the derivation of two-sided Korteweg–de Vries(KdV) equations(KdVEs). The KdV single-soliton solutions(KdVsss) are determined using the hyperbolic secant method and the KdV multi-soliton solutions(KdVMss)are obtained using the Hirota method. The effects of superthermality of electrons, temperature ratios of electron to light ion and heavy ion to electron, and the density ratio of electron to heavy ion on phase shifts are investigated for the head-on collisions between two-soliton HIAWs. The effects of plasma parameters on angular frequency, phase speed, production of multi-soliton structures, and the head-on collisions among single-, double-, triple-, quadruple-, and quintuplesolitons are also studied.

关键词： HIAWs multi-soliton kappa-distribution ePLK method Hirotta's method multi-ion

A new record of Cleantioides emarginata Kwon & Kim, 1992 (Crustacea, Isopoda, Valvifera) from Changjiang River estuary, China

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Oceanology and Limnology 2013年第3期31卷 625-631页

作者：刘文亮 Gary C. b. POORE The state Key Laboratory of Estuarine and Coastal Research East China Normal University Museum Victoria GPO Box 666Melbourne

Abstract At present, descriptions of Cleantioides emarginata Kwon ＆ K/m, 1992 have been limited to the type locality of Pusan, In this study, we discovered this species in the Changjiang （Yangtze） River estuary, China. This represents an extension of the known geographical range of C. emarginata. In addition, we present information of a colour pattern not previously described, along with details on the estuarine habitat of the species.

关键词： Isopoda Valvifera new record estuarine species Chinese waters

Response of a slender cylindrical member under breaking wave impact

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2019年第2期31卷 345-357页

作者： Manjula R. sannasiraj s.A Department of Civil Engineering National Institute of TechnologyTiruchirappalliIndia Department of Ocean Engineering Indian Institute of Technology MadrasChennaiIndia

A slender cylindrical member is the fundamental component of many coastal and offshore *** is essential to understand the action of breaking waves on structural members since,when these members are subjected to wave impact load,the structural damages and failures may be *** the present study,an experimental investigation has been carried out to measure the response of the slender vertical cylinder subjected to breaking wave *** measurements were made in order to estimate the total force acting on the *** empirical relation is established between total impact force and the wave steepness parameter which dictates the intensity of the *** rise time is an important parameter dictating the impact *** acceleration and strain measurements were made to evaluate the response of the *** has been derived from structure *** deflection due to the moderate plunging differs by two order more than severe plunging *** rate is another important consideration for the impact *** higher strain rate increases the resistance of the *** the breaking wave impact on the cylinder,the strain rate varies from 102 to 10-4.

关键词： breaking wave impact acceleration slender vertical cylinder wave steepness strain rate strain

EFFICIENT sUbsPACE CLUsTERING FOR HIGHER DIMENsIONAL DATA UsING FUZZY ENTROPY

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of systems science and systems Engineering 2009年第1期18卷 95-110页

作者： C.PALANIsAMY s.sELVAN Department of Information Technology Bannari Amman Institute of TechnologySathyamangalamTNIndia Department of Computer science St.Peters Engineering CollegeChennaiTNIndia

In this paper we propose a novel method for identifying relevant subspaces using fuzzy entropy and perform clustering. This measure discriminates the real distribution better by using membership functions for measuring class match degrees. Hence the fuzzy entropy reflects more information in the actual distribution of patterns in the subspaces. We use a heuristic procedure based on the silhouette criterion to find the number of clusters. The presented theories and algorithms are evaluated through experiments on a collection of benchmark data sets. Empirical results have shown its favorable performance in comparison with several other clustering algorithms.

关键词： Clustering entropy fuzzy entropy class match degree subspace