This paper proposes an image segmentation method based on the combination of the wavelet multi-scale edge detection and the entropy iterative threshold selection.Image for segmentation is divided into two parts by hig...This paper proposes an image segmentation method based on the combination of the wavelet multi-scale edge detection and the entropy iterative threshold selection.Image for segmentation is divided into two parts by high- and low-frequency.In the high-frequency part the wavelet multiscale was used for the edge detection,and the low-frequency part conducted on segmentation using the entropy iterative threshold selection method.Through the consideration of the image edge and region,a CT image of the thorax was chosen to test the proposed method for the segmentation of the lungs.Experimental results show that the method is efficient to segment the interesting region of an image compared with conventional methods.展开更多
A panel method is described for calculating potential flow around near-surface submarines. The method uses Havelock sources which automatically satisfy the linearized free-surface boundary condition. Outputs from the ...A panel method is described for calculating potential flow around near-surface submarines. The method uses Havelock sources which automatically satisfy the linearized free-surface boundary condition. Outputs from the method include pressure field, pressure drag, wave resistance, vertical force, trim moment and wave pattern. Comparisons are made with model tests for wave resistance of Series 58 and DARPA SUBOFF hulls, as well as with wave resistance, lift force and trim moment of three length-to-diameter variants of the DSTO Joubert submarine hull. It is found that the Havelock source panel method is capable of determining with reasonable accuracy wave resistance, vertical force and trim moment for submarine hulls. Further experimental data are required in order to assess the accuracy of the method for pressure field and wave pattern prediction. The method is implemented in the computer code“HullWave”and offers potential advantages over RANS-CFD codes in terms of speed, simplicity and robustness.展开更多
There is the question--can we hope that humanism and erudition can redevelop nowadays？ In the long history of humanistic inheritance, from ancient times till the end of the 18th century, there was obvious decadence o...There is the question--can we hope that humanism and erudition can redevelop nowadays？ In the long history of humanistic inheritance, from ancient times till the end of the 18th century, there was obvious decadence of essential humanistic points. As the historial period, humanism means revival of classical culture, and as a specific culturological phenomenon, it means erudite education created by Hellens and developed by Romans, who recovered ＂humanitas＂ as global education. Italy was the first who helped humanists to contemplate on classical culture; and in post-medieval age, Italian humanists achieved a supreme measure of humanism through their ＂humanistic studies.＂ We will try to point out good achievements of humanism erudite education in European culture in later epochs. Humanism leads man to turn over to world--after medieval stricture--and it becomes self-conscious revolution, what we can see in Latin literature till the 18th century. Rise of individualism, development of libraries and humanistic academies give chance to latin tradition in European literature as universal discipline, including erudite education in international corpus （Ragusa also）. High-intellectual and latinized elites with humanistic state of mind develop complex spiritual inteligency with science requests in later epochs too. We will try to explain in which degree humanism, with its synthetic point of view, influences on later corpus of European literary themes and how great its actuallity is nowdays.展开更多
The authors report zircon U-Pb geochronological, whole-rock geochemical and zircon Lu-Hf isotope data for the hornblende gabbro within the Khanka Massif, with the aim of constraining its formation time and petrogenesi...The authors report zircon U-Pb geochronological, whole-rock geochemical and zircon Lu-Hf isotope data for the hornblende gabbro within the Khanka Massif, with the aim of constraining its formation time and petrogenesis. The zircon U-Pb dating shows that 206 pb^238 Pb ages of zircons from the hornblende gabbro range from 120 to 129 Ma, yielding a weighted mean age of 123±2 Ma, i.e., the Early Cretaceous. The hornblende gabbro has SiO2 of 44.77%-46.58% and belongs to the tholeiitie series on FeOt/MgO-SiO2 diagram. It dis-plays a right-inclined REE pattern with （La/Yb）N ratios of 3.44 to 4.42. The trace element spidergram shows that they are enriched in large ion lithophile elements （LILE） such as Rb, Th, U, K and Pb, and depleted in high field strength elements （HFSE） such as Nb, Ta, Ti and P, indicating an affinity to arc igneous rocks. The ettf（t） values of zircons vary from -2.6 to ＋ 3.9 and Hf model ages （TDM1 ） range from 622 to 883 Ma. These geochemical characteristics indicate that primary magma of the hornblende gabbro could be derived from partial melting of young mantle material acereted during the Neoproterozoie. Combined with the Early Creta-ceous igneous rock assemblages in NE Asia. It is concluded that the hornblende gabbro formed in an active con-tinental margin related to the westward subduction of the Paleo-Paeific Plate beneath the Khanka Massif.展开更多
Many reefs of the Late Paleozoic have been discovered recently in the Hinggan-lnner Mongolia area. These reefs clearly are geographically extensive, and possess distinctive features and well-developed reef-facies. The...Many reefs of the Late Paleozoic have been discovered recently in the Hinggan-lnner Mongolia area. These reefs clearly are geographically extensive, and possess distinctive features and well-developed reef-facies. They have been found to contain five reef-building communities and were constructed in four periods. Colonial coral-algal reefs at Aohan and Chifeng represent a warm shallow-sea in the Carboniferous. Different reefs in the Xiwu Banner were formed in three periods： early Late Carboniferous, late Late Carboniferous and Early Permian. These reefs were built in warm sea conditions. Their buildup types include colonial coral frameworks, algae-buildings and lime-mud mounds. Bryozoan reefs in the Zhalaite and Dongwu banners were built in the late Middle Permian and thrived in a cold shallow-sea. All reefs grew independently on two kinds of sedimentary platforms, carbonate and carbonate-clastic mixed platforms. Four reef-forming periods occurred later from south to north, along a collisional course between the North China Plate and the Siberian Plate. These reefs can be arranged into three ＇reef-links＇ or reef zones that extend along plate margins. Among these, the Aohan-Chifeng reef-link indicates a northern margin of the North China Plate, the Zhalaite-Dongwu reef-link marks a southern margin of the Siberian Plate, and the Xiwu-Beishan reef-link reflects the former existence of some inter-plates. The strata of each reef-facies are thick and contain rich asphalt deposits. Overlapping and heteropic layers are very thick and contain dark oil/gas-rich horizons; TOC analyses verify that most of these are good hydrocarbon source rocks. This study shows that the study area is an excellent candidate for oil-gas exploration.展开更多
In the process of China’s dynamic social changes over the past decades, the young-parent identity construction of an emerging middle class and the resulting changes of social-cultural values in this context have attr...In the process of China’s dynamic social changes over the past decades, the young-parent identity construction of an emerging middle class and the resulting changes of social-cultural values in this context have attracted the attention of academic research in recent years. With the focus on the discursive construction of parent identity, this study examines the utilization of first-person pronouns in three different interactional contexts, namely, parent-teacher interaction, parent-parent interaction, and parent-child interaction. The study further explores the patterns of alignment between the parents and their children, parents and teachers of their children, and peer parents during the process of identity construction, followed by a discussion of the implication that young, emerging middleclass Chinese parents fundamentally shape themselves as "concerned" and "involved" parents and the change of values between collectivity and agency. The study not only demonstrates the dynamic and pluralistic nature of parent identity but also deepens our understanding of the indexical roles of first-person pronouns in the discursive construction of emerging middle-class Chinese parent identity and its relationship with the recent social-cultural changes in the Chinese context.展开更多
基金Science Research Foundation of Yunnan Fundamental Research Foundation of Applicationgrant number:2009ZC049M+1 种基金Science Research Foundation for the Overseas Chinese Scholars,State Education Ministrygrant number:2010-1561
文摘This paper proposes an image segmentation method based on the combination of the wavelet multi-scale edge detection and the entropy iterative threshold selection.Image for segmentation is divided into two parts by high- and low-frequency.In the high-frequency part the wavelet multiscale was used for the edge detection,and the low-frequency part conducted on segmentation using the entropy iterative threshold selection method.Through the consideration of the image edge and region,a CT image of the thorax was chosen to test the proposed method for the segmentation of the lungs.Experimental results show that the method is efficient to segment the interesting region of an image compared with conventional methods.
文摘A panel method is described for calculating potential flow around near-surface submarines. The method uses Havelock sources which automatically satisfy the linearized free-surface boundary condition. Outputs from the method include pressure field, pressure drag, wave resistance, vertical force, trim moment and wave pattern. Comparisons are made with model tests for wave resistance of Series 58 and DARPA SUBOFF hulls, as well as with wave resistance, lift force and trim moment of three length-to-diameter variants of the DSTO Joubert submarine hull. It is found that the Havelock source panel method is capable of determining with reasonable accuracy wave resistance, vertical force and trim moment for submarine hulls. Further experimental data are required in order to assess the accuracy of the method for pressure field and wave pattern prediction. The method is implemented in the computer code“HullWave”and offers potential advantages over RANS-CFD codes in terms of speed, simplicity and robustness.
文摘There is the question--can we hope that humanism and erudition can redevelop nowadays？ In the long history of humanistic inheritance, from ancient times till the end of the 18th century, there was obvious decadence of essential humanistic points. As the historial period, humanism means revival of classical culture, and as a specific culturological phenomenon, it means erudite education created by Hellens and developed by Romans, who recovered ＂humanitas＂ as global education. Italy was the first who helped humanists to contemplate on classical culture; and in post-medieval age, Italian humanists achieved a supreme measure of humanism through their ＂humanistic studies.＂ We will try to point out good achievements of humanism erudite education in European culture in later epochs. Humanism leads man to turn over to world--after medieval stricture--and it becomes self-conscious revolution, what we can see in Latin literature till the 18th century. Rise of individualism, development of libraries and humanistic academies give chance to latin tradition in European literature as universal discipline, including erudite education in international corpus （Ragusa also）. High-intellectual and latinized elites with humanistic state of mind develop complex spiritual inteligency with science requests in later epochs too. We will try to explain in which degree humanism, with its synthetic point of view, influences on later corpus of European literary themes and how great its actuallity is nowdays.
基金Supported by National Natural Science Foundation of China(No.41330206)
文摘The authors report zircon U-Pb geochronological, whole-rock geochemical and zircon Lu-Hf isotope data for the hornblende gabbro within the Khanka Massif, with the aim of constraining its formation time and petrogenesis. The zircon U-Pb dating shows that 206 pb^238 Pb ages of zircons from the hornblende gabbro range from 120 to 129 Ma, yielding a weighted mean age of 123±2 Ma, i.e., the Early Cretaceous. The hornblende gabbro has SiO2 of 44.77%-46.58% and belongs to the tholeiitie series on FeOt/MgO-SiO2 diagram. It dis-plays a right-inclined REE pattern with （La/Yb）N ratios of 3.44 to 4.42. The trace element spidergram shows that they are enriched in large ion lithophile elements （LILE） such as Rb, Th, U, K and Pb, and depleted in high field strength elements （HFSE） such as Nb, Ta, Ti and P, indicating an affinity to arc igneous rocks. The ettf（t） values of zircons vary from -2.6 to ＋ 3.9 and Hf model ages （TDM1 ） range from 622 to 883 Ma. These geochemical characteristics indicate that primary magma of the hornblende gabbro could be derived from partial melting of young mantle material acereted during the Neoproterozoie. Combined with the Early Creta-ceous igneous rock assemblages in NE Asia. It is concluded that the hornblende gabbro formed in an active con-tinental margin related to the westward subduction of the Paleo-Paeific Plate beneath the Khanka Massif.
基金supported by the Geological Survey of China (Grant No. 1212010782004)National Natural Science Foundation of China (Grant No. 41072021)
文摘Many reefs of the Late Paleozoic have been discovered recently in the Hinggan-lnner Mongolia area. These reefs clearly are geographically extensive, and possess distinctive features and well-developed reef-facies. They have been found to contain five reef-building communities and were constructed in four periods. Colonial coral-algal reefs at Aohan and Chifeng represent a warm shallow-sea in the Carboniferous. Different reefs in the Xiwu Banner were formed in three periods： early Late Carboniferous, late Late Carboniferous and Early Permian. These reefs were built in warm sea conditions. Their buildup types include colonial coral frameworks, algae-buildings and lime-mud mounds. Bryozoan reefs in the Zhalaite and Dongwu banners were built in the late Middle Permian and thrived in a cold shallow-sea. All reefs grew independently on two kinds of sedimentary platforms, carbonate and carbonate-clastic mixed platforms. Four reef-forming periods occurred later from south to north, along a collisional course between the North China Plate and the Siberian Plate. These reefs can be arranged into three ＇reef-links＇ or reef zones that extend along plate margins. Among these, the Aohan-Chifeng reef-link indicates a northern margin of the North China Plate, the Zhalaite-Dongwu reef-link marks a southern margin of the Siberian Plate, and the Xiwu-Beishan reef-link reflects the former existence of some inter-plates. The strata of each reef-facies are thick and contain rich asphalt deposits. Overlapping and heteropic layers are very thick and contain dark oil/gas-rich horizons; TOC analyses verify that most of these are good hydrocarbon source rocks. This study shows that the study area is an excellent candidate for oil-gas exploration.
基金a part of the Chinese MOE Key Research Project of Humanities and Social Science (Project No.: 16JJD740006) conducted by the Centre for Linguistics and Applied Linguistics, Guangdong University of Foreign Studies
文摘In the process of China’s dynamic social changes over the past decades, the young-parent identity construction of an emerging middle class and the resulting changes of social-cultural values in this context have attracted the attention of academic research in recent years. With the focus on the discursive construction of parent identity, this study examines the utilization of first-person pronouns in three different interactional contexts, namely, parent-teacher interaction, parent-parent interaction, and parent-child interaction. The study further explores the patterns of alignment between the parents and their children, parents and teachers of their children, and peer parents during the process of identity construction, followed by a discussion of the implication that young, emerging middleclass Chinese parents fundamentally shape themselves as "concerned" and "involved" parents and the change of values between collectivity and agency. The study not only demonstrates the dynamic and pluralistic nature of parent identity but also deepens our understanding of the indexical roles of first-person pronouns in the discursive construction of emerging middle-class Chinese parent identity and its relationship with the recent social-cultural changes in the Chinese context.
