A class of nonlinear global climate oscillation models is considered. Using perturbation theory and its methods, solutions to the asymptotic expansions of some related problems are constructed. These asymptotic expans...A class of nonlinear global climate oscillation models is considered. Using perturbation theory and its methods, solutions to the asymptotic expansions of some related problems are constructed. These asymptotic expansions of the solutions for the original problem possess a higher approximation. The perturbed asymptotic method is an analyti cmethod.展开更多
Carbon monoxide(CO) plays a significant role in global warming and atmospheric chemistry. Global oceans are net natural sources of atmospheric CO. CO at surface ocean is primarily produced from the photochemical degra...Carbon monoxide(CO) plays a significant role in global warming and atmospheric chemistry. Global oceans are net natural sources of atmospheric CO. CO at surface ocean is primarily produced from the photochemical degradation of chromophoric dissolved organic matter(CDOM). In this study, the effects of photobleaching, temperature and the origin(terrestrial or marine) of CDOM on the apparent quantum yields(AQY) of CO were studied for seawater samples collected from Jiaozhou Bay. Our results demonstrat that photobleaching, temperature and the origin of CDOM strongly affected the efficiency of CO photoproduction. The concentration, absorbance and fluorescence of CDOM exponentially decreased with increasing light dose. Terrestrial riverine organic matter could be more prone to photodegradation than the marine algae-derived one. The relationships between CO AQY and the dissolved organic carbon-specific absorption coefficient at 254 nm for the photobleaching study were nonlinear, whereas those of the original samples were strongly linear. This suggests that: 1) terrestrial riverine CDOM was more efficient than marine algae-derived CDOM for CO photoproduction; 2) aromatic and olefinic moieties of the CDOM pool were affected more strongly by degradation processes than by aliphatic ones. Water temperature and the origin of CDOM strongly affected the efficiency of CO photoproduction. The photoproduction rate of CO in autumn was estimated to be 31.98 μmol m-2 d-1 and the total DOC photomineralization was equivalent to 3.25%- 6.35% of primary production in Jiaozhou Bay. Our results indicate that CO photochemistry in coastal areas is important for oceanic carbon cycle.展开更多
The technique of precise point positioning (PPP) is gradually becoming a popular method in GPS data-processing. In GPS observation equation, the unknown parameters can be separated into two parts: global parameters an...The technique of precise point positioning (PPP) is gradually becoming a popular method in GPS data-processing. In GPS observation equation, the unknown parameters can be separated into two parts: global parameters and local parameters. The global parameters include orbit, satellite clock and geodynamic parameters. The local parameters are site-occupation-specific, such as position, tropospheric delay, etc. The formulas of local parameters are firstly derived under the network-solution and the PPP-solution conditions respectively. If the weight matrix of global parameters in PPP-solution is small enough, the cofactor matrices of local parameters are the same as that in network-solution. Then, 16 daily solutions are obtained in both PPP mode and network mode. Three sites are selected to compare the solutions. The experimental results demonstrated that the difference between two solutions in coordinates and tropospheric delays are only few millimeters. This level of difference can be neglected so that the solutions from both PPP mode and network mode can be taken as the same in the actual application.展开更多
In this paper, the mechanisms and principles of economic regulation from the classical and modem approaches standpoints were analyzed, the typical for world economic theory trends of the government＇s economic role el...In this paper, the mechanisms and principles of economic regulation from the classical and modem approaches standpoints were analyzed, the typical for world economic theory trends of the government＇s economic role elaboration, of the government regulatory authority, reducing in favor of market self-organization was argued. The transnationalization as a factor of government regulation mechanisms modernization was estimated and the perspectives of government and MNC interactions development in the modem world were evaluated. The recommendations for improving the government economical regulation infrastructure and mechanisms due to the conditions of economy globalizing, transnational business developing, technologies progressing were presented展开更多
The society of today often likes to brand itself as modem, advanced, civilized, or a society of positive changes. However, it is a fact that the world is confronted with huge contradictions that oppose such qualificat...The society of today often likes to brand itself as modem, advanced, civilized, or a society of positive changes. However, it is a fact that the world is confronted with huge contradictions that oppose such qualifications. Obviously, one of the most striking and almost unbelievable realities tells us about inhumane and uncivilized actions of child exploitation in ＂entrepreneurial＂ purposes in the widest range of exploitation and abuse. Current period of economic crisis tells us even more about the rising crisis of moral, which is, in statistical terms, confirmed by a rising number of exploited children in a global framework, and even in some national frameworks as well. With that, some positive results about the diminishing number of exploited children are devaluated. The question is what are the ＂limits＂ of such behavior of groups, organizations, and individuals whose behavior is, obviously, tolerated in the frameworks of certain national economies. Does this behavior have clarity as a part of modem society？ Or, even more severe, for how long can we as a society close our eyes in front of such facts？ Do we even have the right？ In this paper, the authors strive towards focusing and objectifying the global problem of exploitation and abuse of children in ＂entrepreneurial＂ purposes, primarily with the purpose of updating all parts of the society of this paradox and the need of raising the awareness and teaching all relevant factors--from institutions to individuals, with the purpose of resolving and more neutralize the equivalents of this uncivilized and non-entrepreneurial ＂phenomenon＂, as well as approaching the same in the framework of different actions with broadest measures possible and with all disposable assets.展开更多
Changes in global climate intensify the hydrological cycle, directly influence precipitation, evaporation, runoff, and cause the re-distribution of water resources in time and space. The aridity index （AI）, defined ...Changes in global climate intensify the hydrological cycle, directly influence precipitation, evaporation, runoff, and cause the re-distribution of water resources in time and space. The aridity index （AI）, defined as the ratio of annual precipitation to annual potential evapotranspiration, is a widely used numerical indicator to quantify the degree of dryness at a given location. This study examined the effects of climate change on Al in China during 1961-2015. The results showed that the nationally averaged AI experienced a notable interdecadal transition in 1993, characterized by increasing AI （wetter） between 1961 and 1993, and decreasing AI （drier） after 1993. Overall, the decreased solar radiation （solar dimming） was the main factor affected the nationally averaged AI during 1961-1993, while the relative humidity dominated the variations of nationally averaged AI during 1993-2015. However, the roles of individual factors on the changes in AI vary in different subregions. Precipitation is one of the important contributing factors for the changes orAl in almost all subregions, except the Mid-Lower Yangtze and Huaihe basins. Solar radiation has been significantly decreased during 1961-1993 in South China, Southwest China, Mid-Lower Yangtze and Huaihe basins, and the Tibetan Plateau. Therefore, it dominated the trends of AI in these subregions. The relative humidity mainly affected the Mid-Lower Yangtze and Huaihe basins, Southwest China, and the Tibetan Plateau during 1993-2015, hence dominated the trends of Al in these subregions. The changes of temperature and wind speed, however, played a relatively weak role in the variations of AI.展开更多
基金supported by the support of the National Natural Science Foundation of China (Grant No. 40676016)the State Key Development Program for Basic Research of China (Grant Nos. 2003CB415101-03, 2004CB418304)+1 种基金the Key of the Knowledge Innovation of the Chinese Academy of Sciences (Grant No. KZCX3-SW-221)in part, by the E-Institutes of Shanghai Municipal Education Commission (Grant No. E03004)
文摘A class of nonlinear global climate oscillation models is considered. Using perturbation theory and its methods, solutions to the asymptotic expansions of some related problems are constructed. These asymptotic expansions of the solutions for the original problem possess a higher approximation. The perturbed asymptotic method is an analyti cmethod.
基金financially supported by the National Natural Science Foundation of China (No. 40976043)the Science and Technology Key Project of Shandong Province (2006GG2205024)+2 种基金the Changjiang Scholars Program, Ministry of Education of Chinathe Taishan Scholars Program of Shandong Provincethe Scholar Foundation of Qingdao Agricultural University (631102)
文摘Carbon monoxide(CO) plays a significant role in global warming and atmospheric chemistry. Global oceans are net natural sources of atmospheric CO. CO at surface ocean is primarily produced from the photochemical degradation of chromophoric dissolved organic matter(CDOM). In this study, the effects of photobleaching, temperature and the origin(terrestrial or marine) of CDOM on the apparent quantum yields(AQY) of CO were studied for seawater samples collected from Jiaozhou Bay. Our results demonstrat that photobleaching, temperature and the origin of CDOM strongly affected the efficiency of CO photoproduction. The concentration, absorbance and fluorescence of CDOM exponentially decreased with increasing light dose. Terrestrial riverine organic matter could be more prone to photodegradation than the marine algae-derived one. The relationships between CO AQY and the dissolved organic carbon-specific absorption coefficient at 254 nm for the photobleaching study were nonlinear, whereas those of the original samples were strongly linear. This suggests that: 1) terrestrial riverine CDOM was more efficient than marine algae-derived CDOM for CO photoproduction; 2) aromatic and olefinic moieties of the CDOM pool were affected more strongly by degradation processes than by aliphatic ones. Water temperature and the origin of CDOM strongly affected the efficiency of CO photoproduction. The photoproduction rate of CO in autumn was estimated to be 31.98 μmol m-2 d-1 and the total DOC photomineralization was equivalent to 3.25%- 6.35% of primary production in Jiaozhou Bay. Our results indicate that CO photochemistry in coastal areas is important for oceanic carbon cycle.
文摘The technique of precise point positioning (PPP) is gradually becoming a popular method in GPS data-processing. In GPS observation equation, the unknown parameters can be separated into two parts: global parameters and local parameters. The global parameters include orbit, satellite clock and geodynamic parameters. The local parameters are site-occupation-specific, such as position, tropospheric delay, etc. The formulas of local parameters are firstly derived under the network-solution and the PPP-solution conditions respectively. If the weight matrix of global parameters in PPP-solution is small enough, the cofactor matrices of local parameters are the same as that in network-solution. Then, 16 daily solutions are obtained in both PPP mode and network mode. Three sites are selected to compare the solutions. The experimental results demonstrated that the difference between two solutions in coordinates and tropospheric delays are only few millimeters. This level of difference can be neglected so that the solutions from both PPP mode and network mode can be taken as the same in the actual application.
文摘In this paper, the mechanisms and principles of economic regulation from the classical and modem approaches standpoints were analyzed, the typical for world economic theory trends of the government＇s economic role elaboration, of the government regulatory authority, reducing in favor of market self-organization was argued. The transnationalization as a factor of government regulation mechanisms modernization was estimated and the perspectives of government and MNC interactions development in the modem world were evaluated. The recommendations for improving the government economical regulation infrastructure and mechanisms due to the conditions of economy globalizing, transnational business developing, technologies progressing were presented
文摘The society of today often likes to brand itself as modem, advanced, civilized, or a society of positive changes. However, it is a fact that the world is confronted with huge contradictions that oppose such qualifications. Obviously, one of the most striking and almost unbelievable realities tells us about inhumane and uncivilized actions of child exploitation in ＂entrepreneurial＂ purposes in the widest range of exploitation and abuse. Current period of economic crisis tells us even more about the rising crisis of moral, which is, in statistical terms, confirmed by a rising number of exploited children in a global framework, and even in some national frameworks as well. With that, some positive results about the diminishing number of exploited children are devaluated. The question is what are the ＂limits＂ of such behavior of groups, organizations, and individuals whose behavior is, obviously, tolerated in the frameworks of certain national economies. Does this behavior have clarity as a part of modem society？ Or, even more severe, for how long can we as a society close our eyes in front of such facts？ Do we even have the right？ In this paper, the authors strive towards focusing and objectifying the global problem of exploitation and abuse of children in ＂entrepreneurial＂ purposes, primarily with the purpose of updating all parts of the society of this paradox and the need of raising the awareness and teaching all relevant factors--from institutions to individuals, with the purpose of resolving and more neutralize the equivalents of this uncivilized and non-entrepreneurial ＂phenomenon＂, as well as approaching the same in the framework of different actions with broadest measures possible and with all disposable assets.
基金partially supported by the National Natural Science Foundation of China (41790424 and 41505043)
文摘Changes in global climate intensify the hydrological cycle, directly influence precipitation, evaporation, runoff, and cause the re-distribution of water resources in time and space. The aridity index （AI）, defined as the ratio of annual precipitation to annual potential evapotranspiration, is a widely used numerical indicator to quantify the degree of dryness at a given location. This study examined the effects of climate change on Al in China during 1961-2015. The results showed that the nationally averaged AI experienced a notable interdecadal transition in 1993, characterized by increasing AI （wetter） between 1961 and 1993, and decreasing AI （drier） after 1993. Overall, the decreased solar radiation （solar dimming） was the main factor affected the nationally averaged AI during 1961-1993, while the relative humidity dominated the variations of nationally averaged AI during 1993-2015. However, the roles of individual factors on the changes in AI vary in different subregions. Precipitation is one of the important contributing factors for the changes orAl in almost all subregions, except the Mid-Lower Yangtze and Huaihe basins. Solar radiation has been significantly decreased during 1961-1993 in South China, Southwest China, Mid-Lower Yangtze and Huaihe basins, and the Tibetan Plateau. Therefore, it dominated the trends of AI in these subregions. The relative humidity mainly affected the Mid-Lower Yangtze and Huaihe basins, Southwest China, and the Tibetan Plateau during 1993-2015, hence dominated the trends of Al in these subregions. The changes of temperature and wind speed, however, played a relatively weak role in the variations of AI.
