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日本作家的巴黎体验与纪行文学研究(1920-1950)
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作者 董悦 《文化创新比较研究》 2021年第29期38-41,共4页
法国巴黎作为二战前欧洲乃至世界文明的中心,其政治、经济、文化等各个领域一度对世界各国产生巨大冲击,其影响力甚至波及了日本这一远东国家。随着20世纪20-50年代、世界局势的不断变化与“洋行”意义的交替更迭,日本对西方文明的认识... 法国巴黎作为二战前欧洲乃至世界文明的中心,其政治、经济、文化等各个领域一度对世界各国产生巨大冲击,其影响力甚至波及了日本这一远东国家。随着20世纪20-50年代、世界局势的不断变化与“洋行”意义的交替更迭,日本对西方文明的认识不断发生改变。在这一日本审视外界、同时又通过外界不断审视自己的历史独特期,金子光晴、横光利一和森有正三人以其鲜明的东西文明观,共同构成了20世纪20-50年代“洋行”背景下、独特的意识形态链与文化景观,是那个时代日本作家“巴黎”体验的缩影。而这些在其一篇篇纪行文学作品中都得到了具象化体现。 展开更多
关键词 巴黎体验 日本作家 纪行文学 “洋行” 东西文明论
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Identifying Global Monsoon Troughs and Global Atmospheric Centers of Action on a Pentad Scale 被引量:18
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作者 QIAN Wei-Hong TANG Shuai-Qi 《Atmospheric and Oceanic Science Letters》 2010年第1期1-6,共6页
Using two datasets of global pentad grid precipitation and global 850 hPa geopotential height during 1979-2007,this study identified global monsoon troughs and global atmospheric centers of action (ACAs) on a pentad s... Using two datasets of global pentad grid precipitation and global 850 hPa geopotential height during 1979-2007,this study identified global monsoon troughs and global atmospheric centers of action (ACAs) on a pentad scale.The global monsoon troughs consist of planetary-scale monsoon troughs and peninsula-scale monsoon troughs.Forced by seasonal variations in solar radiation,the inter-tropical convergence zones (ITCZs) represent the planetary-scale monsoon troughs,which are active and shift over the tropical North Pacific,the tropical North Atlantic,and the tropical South Indian oceans.The peninsula-scale monsoon troughs are originated from regional land-sea topography and varied with contrasts in seasonal land-sea surface temperatures and precipitation.During the boreal summer,five peninsula-scale troughs and one planetary-scale trough are distributed in the Asia-Northwest Pacific (NWP) region.In total,22 troughs,nine monsoon troughs,and 19 ACAs in the lower troposphere were identified.Relevant ACAs may be useful in constructing regional monsoon and circulation indices. 展开更多
关键词 monsoon trough planetary scale peninsula scale atmospheric centers of action pentad scale
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Fossil biotas from Pakistan with focus on dinosaur distributions and discussion on paleobiogeographic evolution of Indo-Pak Peninsula 被引量:4
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作者 M.Sadiq Malkan SUN Ge 《Global Geology》 2016年第4期230-240,共11页
Recent geological and paleontological exploration in the Indus basin of Pakistan allowed the discoveries of numerous remains of non-marine reptiles( titanosaurian sauropod,abelisaurian and noasaurian theropod dinosaur... Recent geological and paleontological exploration in the Indus basin of Pakistan allowed the discoveries of numerous remains of non-marine reptiles( titanosaurian sauropod,abelisaurian and noasaurian theropod dinosaurs),and marine reptiles( crocodiles),flying reptiles( pterosaurs),marine and non-marine mammals,fishes,invertebrates,and plants,especially Pakistan is relatively rich in footprints / trackways in the Mesozoic.These vertebrates of Indo-Pakistan are very significant for paleobiogeographic study due to the present-day connection of this continent with Asia in Northern Hemisphere,whereas during past( Jurassic and pre-Jurassic) it was connected to the Gondwana. The Mesozoic vertebrates show close affinities with Gondwanan landmasses.The Cenozoic vertebrates show Eurasian affinity and migrated from Indo-Pak subcontinent to Eurasia or vice versa via Paleo Indus River systems along Western Indus Suture,after long journey of about 6 000 km the first collision of Indo-Pak subcontinent with Asia occurred at terminal Cretaceous. 展开更多
关键词 fossil biotas dinosaurs Pakistan PALEOBIOGEOGRAPHY Indo-Pak subcontinet.
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The isolation of prophyra-334 from marine algae and its UV-absorption behavior 被引量:1
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作者 张朝辉 高昕Department of Food Engineering +5 位作者 Ocean University of China Qingdao 266003 China Yuri Tashiro Shingo Matsukawa Hiroo Ogawa 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2005年第4期400-405,共6页
Prophyra-334 was prepared by methanol extraction and HPLC methods from marine algae (dried laver). It is a sunscreen compound that has good absorption of ultraviolet radiations in the wavelength ranges of 200-400 nm... Prophyra-334 was prepared by methanol extraction and HPLC methods from marine algae (dried laver). It is a sunscreen compound that has good absorption of ultraviolet radiations in the wavelength ranges of 200-400 nm. The absorption maximum wavelength of prophyra-334 is at 334 nm, so defined the name. The molar extinction coefficient (ε) of prophyra-334 in aqueous solution at 334 nm wavelength is 4.23×10^4. The absorption of prophyra-334 in organic solvents differs in aqueous solutions. In polar organic solvents, the absorption maximum wavelength of prophyra-334 has a slight shift toward longer wavelength compared with that in pure water. On the contrary, in inert non-polar organic solvents, the absorption maximum wavelength and the shape of absorption spectra of prophyra-334 are changed. The effects of organic solvents on prophyra-334 stability suggested that: (1) the absorbance of prophyra-334 in water is generally constant at temperature of 60℃ in 24 h, meaning that prophyra-334 is quite stable in water; (2) the absorbance of prophyra-334 in ethanol and hexane decreases at the same condition. The stability of prophyra-334 in organic solvents is less than that in aqueous solution. In benzene, the prophyra-334 is very instable. 展开更多
关键词 prophyra-334 EXTRACTION ISOLATION marine algae organic solvent UV-absorption
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Planning method for AUV region detection under ocean current 被引量:1
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作者 ZHANGMing-jun HANZhi-xue 《Journal of Marine Science and Application》 2004年第1期46-51,共6页
In this paper we present two strategies of AUV (Autonomous Underwater Vehicle) region detection and an approach to decompose the detection region according to the direction of the ocean current. In the task of local d... In this paper we present two strategies of AUV (Autonomous Underwater Vehicle) region detection and an approach to decompose the detection region according to the direction of the ocean current. In the task of local detection and identification, the algorithm against the ocean current was proposed. In the tasks of closing obstacle, going back or moving, the fuzzy logic theory was used to solve the effect of ocean current. In one of our strategies the concept of weighted journey based on the angle between heading and ocean current is suggested and the TSP's exact optimal result is utilized to solve the global path planning. Simulations demonstrate the feasibility of this approach. 展开更多
关键词 AUV ocean current region detection planning method
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Galvanic Corrosion Behaviour of Aluminium 3004 and Copper in Tropical Marine Atmosphere 被引量:11
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作者 G. Subramanian S. Palraj S. Palanichamy 《Journal of Marine Science and Application》 2014年第2期230-236,共7页
The galvanic corrosion behaviour of aluminium 3004 and copper with different area ratios were studied in the tropical marine atmosphere at Tuticorin harbour over a period of 426 days. The area ratios OfAAI: Acu, stud... The galvanic corrosion behaviour of aluminium 3004 and copper with different area ratios were studied in the tropical marine atmosphere at Tuticorin harbour over a period of 426 days. The area ratios OfAAI: Acu, studied were l:l, 1:2, l:4, 1:8, 2:1, 4:1 & 8:1. The galvanic corrosion behaviour of metals was studied in terms of relative increase in the corrosion rate of aluminium due to galvanic coupling with copper, relative decrease in the corrosion rate of copper due to galvanic coupling with aluminium, and the susceptibility of aluminium to pitting owing to galvanic coupling with copper, The galvanic potential and galvanic current of the system were monitored. Pits of different dimensions ranging from mild etchings to perforations were experienced on the borders and the surfaces of the interface of aluminium in contact with copper. The weathering parameters and the environmental pollutants which have a major role in influencing the galvanic corrosion of metals were also monitored. The corrosion products resulting from galvanic corrosion were analysed using XRD and the pitting on aluminium resulting from galvanic corrosion has been highlighted in terms of pit depth, size and density of pit, using a high resolution microscope. 展开更多
关键词 aluminium 3004 COPPER galvanic corrosion corrosionproducts PITTING tropical marine atmosphere
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First attempt to use a remotely operated vehicle to observe soniferous fish behavior in the Gulf of Maine,Western Atlantic Ocean
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作者 Rodney A.ROUNTREE Francis JUANES 《Current Zoology》 SCIE CAS CSCD 北大核心 2010年第1期90-99,共10页
Underwater sound and video observations were made at noon, sunset, and midnight in sand, gravel, and boulder habitat in the Stellwagen Bank National Marine Sanctuary, Gulf of Maine, USA in October 2001 using a remotel... Underwater sound and video observations were made at noon, sunset, and midnight in sand, gravel, and boulder habitat in the Stellwagen Bank National Marine Sanctuary, Gulf of Maine, USA in October 2001 using a remotely operated vehicle (ROV). Seventeen species of fish and squid were observed with clear habitat and time differences. Observations of feeding behavior, disturbance behavior, and both interspecific and intraspecific interactions provided numerous opportunities for potential sound production; however, sounds were recorded only during a single dive. Although high noise levels generated by the ROV and support ship may have masked some sounds, we conclude that fish sound production in the Gulf of Maine during the fall is uncommon. The recorded fish sounds are tentatively attributed to the cusk Brosme brosme. Cusk sounds consisted variously of isolated thumps, widely spaced thump trains, drumrolls, and their combinations. Frequency peaks were observed at 188, 539, and 1195 Hz. Use of a remotely operated vehicle (ROV) as a passive acoustic observation platform was problematic due to high ROV self-noise and the ROV's inability to maintain a fixed position on the bottom without thruster power. Some fishes were clearly also disturbed by ROV noise, indicating a potential ROV sampling bias. Based on our observations, we suggest that new instruments incorporating both optic and passive acoustic technologies are needed to provide better tools for in situ behavioral studies ofcusk and other fishes [Current Zoology 56 (1): 90-99 2010]. 展开更多
关键词 Passive acoustics Soniferous Gulf of Maine ROV Sound production Fish behavior
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Vector form Intrinsic Finite Element Method for the Two-Dimensional Analysis of Marine Risers with Large Deformations 被引量:3
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作者 LI Xiaomin GUO Xueli GUO Haiyan 《Journal of Ocean University of China》 SCIE CAS CSCD 2018年第3期498-506,共9页
Robust numerical models that describe the complex behaviors of risers are needed because these constitute dynamically sensitive systems. This paper presents a simple and efficient algorithm for the nonlinear static an... Robust numerical models that describe the complex behaviors of risers are needed because these constitute dynamically sensitive systems. This paper presents a simple and efficient algorithm for the nonlinear static and dynamic analyses of marine risers. The proposed approach uses the vector form intrinsic finite element(VFIFE) method, which is based on vector mechanics theory and numerical calculation. In this method, the risers are described by a set of particles directly governed by Newton's second law and are connected by weightless elements that can only resist internal forces. The method does not require the integration of the stiffness matrix, nor does it need iterations to solve the governing equations. Due to these advantages, the method can easily increase or decrease the element and change the boundary conditions, thus representing an innovative concept of solving nonlinear behaviors, such as large deformation and large displacement. To prove the feasibility of the VFIFE method in the analysis of the risers, rigid and flexible risers belonging to two different categories of marine risers, which usually have differences in modeling and solving methods, are employed in the present study. In the analysis, the plane beam element is adopted in the simulation of interaction forces between the particles and the axial force, shear force, and bending moment are also considered. The results are compared with the conventional finite element method(FEM) and those reported in the related literature. The findings revealed that both the rigid and flexible risers could be modeled in a similar unified analysis model and that the VFIFE method is feasible for solving problems related to the complex behaviors of marine risers. 展开更多
关键词 marine riser vector form intrinsic finite element (VFIFE) static analysis dynamic analysis geometric nonlinearity
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Comparison of time-restricted and ad libitum self-feeding on the growth,feeding behavior and daily digestive enzyme profiles of Atlantic salmon 被引量:1
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作者 史策 刘鹰 +5 位作者 衣萌萌 郑纪盟 田会芹 杜以帅 李贤 孙国祥 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2017年第4期729-736,共8页
Although it has been hypothesized that a predictable feeding regime in animals allows physiological variables to be adjusted to maximize nutrient utilization and,hence,better growth performance,the assumption has rare... Although it has been hypothesized that a predictable feeding regime in animals allows physiological variables to be adjusted to maximize nutrient utilization and,hence,better growth performance,the assumption has rarely been tested.This study compares the effects of time-restricted versus free access self-feeding on the growth,feeding behavior and daily digestive enzyme rhythms of Atlantic salmon(Salmo salar).In an experiment that lasted 6 weeks,fish(109.9 g) were divided into two groups:group 1 had free access to a self-feeder(FA);group 2 received three meals per day(2 h per meal) at dawn,midday and dusk via a time-restricted self-feeder(TR).At the end of the experiment,the fish were sampled every 3 h over a24-h period.The results showed that the TR fish quickly synchronized their feeding behavior to the feeding window and their blood glucose showed a significant postprandial increase,while FA fish displayed no statistically significant rhythms(P>0.05).Pepsin activity of TR fish also showed a significant daily rhythm(P<0.05) with the acrophase at the second feed and a decrease over the next 12 h.Average daily trypsin,lipase and amylase levels of FA fish were significantly lower than those of TR fish(P<0.01);however,the growth performance of both groups was similar(P>0.05).In conclusion,the study failed to confirm a link between the entrainment of daily digestive enzyme profiles and growth performance,with the TR group showing comparatively poor blood glucose regulation. 展开更多
关键词 Atlantic salmon (Salmo salar) self-feeding regime feeding behavior digestive physiology daily rhythm
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The study on fishing ground of neon flying squid, Ommastrephes bartrami,and ocean environment based on remote sensing data in the Northwest Pacific Ocean 被引量:17
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作者 樊伟 伍玉梅 崔雪森 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2009年第2期408-414,共7页
The relationships between the neon flying squid, Ommastrephes bartrami, and the relative ocean environmental factors are analyzed. The environmental factors collected are sea surface temperature (SST), chlorophyll c... The relationships between the neon flying squid, Ommastrephes bartrami, and the relative ocean environmental factors are analyzed. The environmental factors collected are sea surface temperature (SST), chlorophyll concentration (Chl-α) and sea surface height (SSH) from NASA, as well as the yields of neon flying squid in the North Pacific Ocean. The results show that the favorable temperature for neon flying squid living is 10℃-22℃ and the favorite temperature is between 15℃-17℃. The Chl-α concentration is 0.1-0.6 mg/m^3. When Chl-α concentration changes to 0.12-0.14 mg/m^3, the probability of forming fishing ground becomes very high. In most fishing grounds, the SSH is higher than the mean SSH. The generalized additive model (GAM) was applied to analyze the correlations between neon flying squid and ocean environmental factors. Every year, squids migrate northward from June to August and return southward during October-November, and the characteristics of the both migrations are very different. When squids migrate to the north, most relationships between the yields and SST are positive. The relationships are negative when squids move to southward. The relationships between the yields and Chl-a concentrations are negative from June to October, and insignificant in November. There is no obvious correlation between the catches of squid and longitude, but good with latitude. 展开更多
关键词 Ommastrephes bartrami generalized additive models sea surface temperature CHLOROPHYLL-A
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Distinguished Effects of Interannual Salinity Variability on the Development of the Central-Pacific El Ni o Events 被引量:4
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作者 ZHENG Fei 1,WAN Li-Ying 2,and WANG Hui 3 1 International Center for Climate and Environment Science (ICCES),Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China 2 Key Laboratory of Research on Marine Hazards Forecasting,National Marine Environmental Forecasting Center,Beijing 100081,China 3 National Meteorological Center,Beijing 100081,China 《Atmospheric and Oceanic Science Letters》 2012年第2期123-127,共5页
El Nio events in the central equatorial Pacific (CP) are gaining increased attention,due to their increasing intensity within the global warming context.Various physical processes have been identified in the climate s... El Nio events in the central equatorial Pacific (CP) are gaining increased attention,due to their increasing intensity within the global warming context.Various physical processes have been identified in the climate system that can be responsible for the modulation of El Nio,especially the effects of interannual salinity variability.In this work,a comprehensive data analysis is performed to illustrate the effects of interannual salinity variability using surface and subsurface salinity fields from the Met Office ENSEMBLES (EN3) quality controlled ocean dataset.It is demonstrated that during the developing phase of an El Nio event,a negative sea surface salinity (SSS) anomaly in the western-central basin acts to freshen the mixed layer (ML),decrease oceanic density in the upper ocean,and stabilize the upper layers.These related oceanic processes tend to reduce the vertical mixing and entrainment of subsurface water at the base of the ML,which further enhances the warm sea surface temperature (SST) anomalies associated with the El Nio event.However,the effects of interannually variable salinity are much more significant during the CP-El Nio than during the eastern Pacific (EP) El Nio,indicating that the salinity effect might be an important contributor to the development of CP-El Nio events. 展开更多
关键词 salinity effect CP-E1 Nifio EN3 dataset
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The ‘Freedom of Navigation’ Issue in Sino-US Relations
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作者 li yan hong jianjun(译) 《Contemporary International Relations》 2016年第1期43-58,共16页
The ‘Freedom of Navigation' issue has been volatile and often influenced by Sino-US relations in recent years. This problem was rooted in different interpretation of the UNCLOS by China and the US. It has also re... The ‘Freedom of Navigation' issue has been volatile and often influenced by Sino-US relations in recent years. This problem was rooted in different interpretation of the UNCLOS by China and the US. It has also reflected their different national Interests and maritime strategies. This issue has caused frequent frictions between the two sides and may lead to their future contest for sea power. At the same time, it also urges the both sides to set up new mechanism for confidence building that may help them to manage it in a more rational way. 展开更多
关键词 maritime military volatile interpretation freedom confidence The navigation permission operations
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Effects of excluding bottom-disturbing mobile fishing gear on abundance and biomass of groundfishes in the Stellwagen Bank National Marine Sanctuary,USA
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作者 Briana K.BROWN Elizabeth SOULE Les KAUFMAN 《Current Zoology》 SCIE CAS CSCD 北大核心 2010年第1期134-143,共10页
The Stellwagen Bank National Marine Sanctuary (southern Gulf of Maine, northwest Atlantic) is partially overlapped by the Western Gulf of Maine Closure Area (WGMCA). This is a region in which mobile, bottom-distur... The Stellwagen Bank National Marine Sanctuary (southern Gulf of Maine, northwest Atlantic) is partially overlapped by the Western Gulf of Maine Closure Area (WGMCA). This is a region in which mobile, bottom-disturbing fishing gear has been banned by the New England Fishery Management Council to facilitate the rebuilding of depleted gronndfish populations. We assessed the effects and effectiveness of the WGMCA on groundfish assemblages using habitat-stratified (gravel, sand, mixed benthic habitats) sampling by means of a commercial trawler, inside and outside of the WGMCA. Sampling occurred over three mouth-long sampling periods in 2004-2005, two during the spring seasons and one during the fall season. A total of 18 species were analyzed for protection effects. After controlling for substratum, location and sampling season, eight groundfish species exhibited higher mean proportional abundance inside than outside the WGMCA while two were proportionally more abundant on average outside of the closure. Four species had higher mean proportional biomasses on average inside the closure and three outside. We conclude that the WGMCA may be achieving its goal of rebuilding abundance and biomass for some commercially targeted groundfishes but not all. This study, six to seven years post-closure establishment, reveals fine-scale spatial and taxonomic complexity which will require a very different monitoring protocol than the one currently in place if adaptive management is to be successful in the region [Current Zoology 56 (1): 134-143, 2010]. 展开更多
关键词 Effects of fishing GROUNDFISH Gulf of Maine Stellwagen Bank National Marine Sanctuary Trawl closure
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Regime Behavior in the Sea Surface Temperature-Cloud Radiative Forcing Relationships over the Pacific Cold Tongue Region 被引量:1
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作者 WU Chun-Qiang ZHOU Tian-Jun De-Zheng SUN 《Atmospheric and Oceanic Science Letters》 2010年第5期271-276,共6页
Previous analyses on the estimates of water vapor and cloud-related feedbacks in the tropics usually use observations over the Earth Radiation Budget Experiment (ERBE) period (1985-89). To examine the sample depen... Previous analyses on the estimates of water vapor and cloud-related feedbacks in the tropics usually use observations over the Earth Radiation Budget Experiment (ERBE) period (1985-89). To examine the sample dependence of previous estimates, the authors extend the analysis to two additional periods: 1990-94 and 1995-99. The results confirm our hypothesis, i.e., the values of the feedbacks depend on the period of data coverage. The differences in the feedbacks from cloud radiative forcings (CRFs) estimated from the three periods are particularly significant. Two possible causes for these differences are proposed. First, a regime behavior in the CRFs-Sea Surface Temperature Anomaly (SSTA) rela- tionship over the cold tongue region is revealed: when SSTA is below -0.5℃, the CRF anomalies are insensitive to the SSTA; when the SSTA is between -0.5℃ and 2.0℃, the CRF anomalies are positively correlated with the SSTA; however, when the SSTA exceeds 2.0℃, the CRF anomalies decrease with the SSTA. This regime behavior is due to the regime behavior of cirrostratus and deep convective clouds. Second, the CRFs-SSTA relationship is regulated by remote forcings. Warming of the far eastern equatorial Pacific would reduce the water vapor convergence over the central Pacific by weakening the trade wind over the southeastern Pacific, thereby reducing the feeding of moisture to the convective flow. The results suggest that CRFs-SSTA relationships during ENSO events are nonlinear and strongly depend on the magnitude and the spatial distribution of the SSTA. 展开更多
关键词 cloud radiative feedback cloud-SST regime ENSO nonlinearity
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Research on the Propagation Acting of the Equatorial Planetary Waves on the Western Equatorial Pacific Warm Pool Heat
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作者 石强 许建平 朱伯康 《Marine Science Bulletin》 CAS 2003年第1期1-15,共15页
Based on the long-term buoy data from the Tropical Atmosphere Ocean ( TAO ) —array during the TOGA ( Tropical Ocean and Global Atmosphere ) Program (19801996), the propagation acting of the Equatorial planetary waves... Based on the long-term buoy data from the Tropical Atmosphere Ocean ( TAO ) —array during the TOGA ( Tropical Ocean and Global Atmosphere ) Program (19801996), the propagation acting of the Equatorial planetary waves on the Western Equatorial Pacific warm pool heat is analyzed. Results show that the zonal heat transmission in the Western Equatorial Pacific takes palace mainly in the subsurface water and spreads eastwards along the thermocline; while the seasonal westward-spreading heat change structure occurs in the mixed layers in the middle and western Pacific. The standing-form transmission in the western Pacific appears in the thermocline layer, while in the eastern pacific, it exists in the mixed layer as well as in the thermocline layer. The standing-form and eastward-spreading sign of zonal heat transmitting in the upper water is predominant and strong, and the westward sign is weak.The component force of Kelvin Equatorial wave pressure runs through the western and eastern Equatorial pacific, and transmits heat energy eastwards. And the heat transmitted by zonal current component occurs mostly in the western Pacific; The heat transmitted by the component force of Rossby wave pressure mainly appears in the eastern and middle areas of the Pacific, while the zonal current component transmitting occurs mainly in the western Pacific; Mixed-Rossby gravity wave’s action on the zonal current is stronger than that of the thermocline layer. In the mean state, the standing wave model of Equatorial Pacific up layer ocean temperature confines the transport of western Pacific warm pool heat to the eastern Pacific. Under abnormal conditions, the standing wave model of Equatorial Pacific up layer ocean temperature weakens, the eastwardly transmitting model enhances, and subsequently n^the El Ni o event occurs. 展开更多
关键词 Equatorial Planetary Wave Equatorial Kelvin Wave Rossby Wave Mixed Rossby Gravity Wave HEAT Western Equatorial Pacific Warm Pool
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Population structure of the Atlantic sand fiddler crab Uca pugilator along the eastern coast of US revealed by molecular data
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作者 David A. WEESE Denson K. MCLAIN +1 位作者 Ann E. PRATT Quentin Q. FANG 《Current Zoology》 SCIE CAS CSCD 北大核心 2009年第2期150-157,共8页
The Atlantic sand fiddler crab Uca pugilator is an extremely abundant crab found along the eastern coast of the United States. Fiddler crabs have a life cycle with an obligatory planktonic larval phase of 30-90 days,w... The Atlantic sand fiddler crab Uca pugilator is an extremely abundant crab found along the eastern coast of the United States. Fiddler crabs have a life cycle with an obligatory planktonic larval phase of 30-90 days,which might be expected to lead to widespread larval dispersal and consequent genetic homogeneity over considerable distances. However,a large amount of morphological and behavioral variation is found between northern and southern populations along the eastern coast. This study was undertaken to determine the population genetic structure of U.pugilator and to determine whether these differences may have a genetic basis. The population structure of the fiddler crab was analyzed using 472 individuals collected from 12 sites along the eastern coast. PCR-based single stand conformation polymorphism (SSCP) was used to investigate between-site variation in the mitochondrial 16S rRNA gene of these individuals. Analysis of genetic variation indicated frequent gene flow between nearby localities,but much reduced levels between populations separated by larger geographic distances. Thus,despite the potential for high dispersal by planktonic larvae,population differentiation and isolation by distance is evident between northern and southern populations of U.pugilator. A high amount of genetic differentiation (F ST =0.3468) was found between northern and southern regions suggesting that the morphological and behavioral differences between these two regions have a genetic basis and may represent subspecies. 展开更多
关键词 Atlantic sand fiddler crab Uca pugilator Deeapoda Molecular population genetics Gene flow SSCP 16S rDNA
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Dissipative Travelling Wave Solution for El Nio Tropic Sea-air Coupled Oscillator
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作者 WEN Zhaohui LIN Wantao +1 位作者 LIN Yihua MO Jiaqit 《Chinese Geographical Science》 SCIE CSCD 2010年第3期275-280,共6页
El Nifio and Southern Oscillation (ENSO) is an interannual phenomenon involved in the tropical Pacific sea-air interactions. An asymptotic method of solving equations for the ENSO model is proposed. Based on a class... El Nifio and Southern Oscillation (ENSO) is an interannual phenomenon involved in the tropical Pacific sea-air interactions. An asymptotic method of solving equations for the ENSO model is proposed. Based on a class of oscillator of ENSO model and by employing a simple and valid method of the variational iteration, the coupled system for a sea-air oscillator model of interdecadal climate fluctuations is studied. Firstly, by introducing a set of functionals and computing the variationals, the Lagrange multipliers are obtained. And then, the generalized variational iteration expressions are constructed. Finally, by selecting appropriate initial iteration, and from the iterations expressions, the approximations of solution for the sea-air oscillator ENSO model are solved successively. The approximate dissipative travelling wave solution of equations for corresponding ENSO model is studied. It is proved from the results that the method of the variational iteration can be used for analyzing the sea surface temperature anomaly in the equatorial Pacific of the sea-air oscillator for ENSO model. 展开更多
关键词 El Nifio-Southem Oscillator model variational iteration sea-air oscillator
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Predictors of Performance of the Maritime Academy of Asia and the Pacific (MAAP) in the OIC Navigational Watch Licensure Examination
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作者 Jose Manabat Barlis Jr. Josefin Datu Fajardo III 《Journal of Shipping and Ocean Engineering》 2015年第2期88-101,共14页
Abstract: The study aimed to assess the predictors of performance administered by the Philippine Regulation Commission (PRC) in the licensure examination of Maritime Academy of Asia and the Pacific (MAAP) for Aca... Abstract: The study aimed to assess the predictors of performance administered by the Philippine Regulation Commission (PRC) in the licensure examination of Maritime Academy of Asia and the Pacific (MAAP) for Academic Year 2007-2011. Specifically, this also aimed to answer the following questions: demographic profile of the maritime graduates, the college related factors, administrative related factors, the level of scholastic achievement of the graduates, and the performance of the graduates in the licensure examination. A total of one hundred seventy three (173) graduates of MAAP from Class 2007-2011 were utilized as the respondents for the study. The study found out that the results of pre board examination and scholastic achievement of the graduates had significant effect on the performance of the graduates in O.I.C Navigational Watch Licensure Examination. Other variables found out to have no significant effect on the result of the licensure examination of the graduates. Therefore, the null hypotheses that the demographic profile of the graduates, college related factors, and administrative related factors has no significant effect on scholastic the achievement of the students were accepted. However, the null hypothesis that scholastic achievement of the students has no significant effect on the performance in maritime licensure examination was rejected. The same way, the null hypothesis that the demographic profile of the graduates, college related factors and the administrative related factors has no significant effect on the performance in Officer in Charge--Navigational Watch licensure Examination were accepted. 展开更多
关键词 Regimental Training Licensure Examination Maritime Academy of Asia and the Pacific Scholastic Achievement Philippine Regulation Commission (PRC) Administrative Related Factors College related factors
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Evaluation of Hong Kong Convention in the Maritime Industry
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作者 Mohamed Hussein Nassar Ahmed Hamdy Moursy 《Journal of Shipping and Ocean Engineering》 2016年第2期117-122,共6页
The HKC (Hong Kong Convention) adopted by the IMO in 2009 is aimed at ensuring that ships, when being recycled after reaching the end of their operational lives, do not pose any unnecessary risk to human health and ... The HKC (Hong Kong Convention) adopted by the IMO in 2009 is aimed at ensuring that ships, when being recycled after reaching the end of their operational lives, do not pose any unnecessary risk to human health and safety of the marine environment. The text of the ship recycling Convention was developed with input from the IMO (International Maritime Organization) Member States and relevant NGOs (Non-Governmental Organizations), and in co-operation with the ILO (International Labor Organization) and the Parties to the Basel Convention. The Convention intends to address all the issues around ship recycling, taking into account that ships sold for scrapping may contain environmentally hazardous substances. It addresses concerns raised about the working and environmental conditions at many of the world ship recycling locations. Regulations in the new Convention cover: the design, construction, operation and preparation of ships so as to facilitate safe and environmentally sound recycling, without compromising the safety and operational efficiency of ships; the operation of ship recycling facilities in a safe and environmentally sound manner; and the establishment of an appropriate enforcement mechanism for ship recycling, incorporating certification and reporting requirements. This paper will present and discuss the evaluation of the Hong Kong Convention. Also it will discuss implementing the Hong Kong convention to improve the recycling business, highlighting the effect of the convention on the maritime industry. 展开更多
关键词 Ship recycling Hong Kong Convention Environmentally Sound Management ship recycling facility ship recycling facility plan hazardous materials.
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Development of an oil spill forecast system for offshore China 被引量:2
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作者 王永刚 魏泽勋 安伟 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2016年第4期859-870,共12页
An oil spill forecast system for of fshore China was developed based on Visual C++. The oil spill forecast system includes an ocean environmental forecast model and an oil spill model. The ocean environmental forecast... An oil spill forecast system for of fshore China was developed based on Visual C++. The oil spill forecast system includes an ocean environmental forecast model and an oil spill model. The ocean environmental forecast model was designed to include timesaving methods, and comprised a parametrical wind wave forecast model and a sea surface current forecast model. The oil spill model was based on the "particle method" and fulfi lls the prediction of oil particle behavior by considering the drifting, evaporation and emulsifi cation processes. A specifi c database was embedded into the oil spill forecast system, which contained fundamental information, such as the properties of oil, reserve of emergency equipment and distribution of marine petroleum platform. The oil spill forecast system was successfully applied as part of an oil spill emergency exercise, and provides an operational service in the Research and Development Center for Off shore Oil Safety and Environmental Technology. 展开更多
关键词 oil spill China offshore particle method emergency service
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