This paper conducts an in-depth analysis of the cost-benefit relationship in content production and dissemination within the media industry,combining theoretical frameworks with empirical case studies.It begins by exa...This paper conducts an in-depth analysis of the cost-benefit relationship in content production and dissemination within the media industry,combining theoretical frameworks with empirical case studies.It begins by examining the current development status and trends of the media industry,highlighting the transformative shift from traditional to new media,technological-driven innovations,and globalization.The study then delves into the economic characteristics of media products,market structure theories,and the application of cost-benefit analysis in enterprise management.Detailed cost analyses cover both direct costsand indirect costs in content production,as well as channel construction costs and promotion costs in content dissemination.Key influencing factors,such as content type,production scale,target audience,and communication timing,are systematically discussed.The benefit analysis evaluates economic impacts and social impacts.A case study of ByteDance illustrates practical applications of cost control strategies and benefit enhancement measures.Finally,the paper proposes strategic recommendations for optimizing content production,innovating dissemination approaches,and strengthening cost-benefit evaluation mechanisms.It concludes with an acknowledgment of research limitations and outlines future research directions,emphasizing longitudinal tracking and global comparative studies.展开更多
By micro- and macro-observations, the deterioration mechanisms of concrete under alternate action between repeated sub-high temperature/cooling by water and sodium sulfate solution attack （TW-SA） were studied; meanw...By micro- and macro-observations, the deterioration mechanisms of concrete under alternate action between repeated sub-high temperature/cooling by water and sodium sulfate solution attack （TW-SA） were studied; meanwhile, the single sodium sulfate solution attack （SA） was also done as comparison. Micro-observations included the analysis of attack products by thermal analysis method and the determination of sulfate-ion content from surface to interior by chemical titrating method （modified barium sulfate gravimetric method）. Macro-observations mainly included the mechanical behaviors such as compressive strength, splitting strength. The experimental results indicate, in both cases, the main attack product is ettringite, only in the first layer of case SA some gypsum is checked; in case SA, the sulfate ions mainly concentrate in the surface layer, so the attack is relatively mild; but in case TW-SA, the repeated sub-high temperature/cooling by water promotes the sulfate ions diffusing inwards, which leads to obvious strength degradation.展开更多
This article introduces the specifics of the MIP technology involving respectively the case for production of clean gasoline, the case for producing clean gasoline coupled with production of diesel and the case for pr...This article introduces the specifics of the MIP technology involving respectively the case for production of clean gasoline, the case for producing clean gasoline coupled with production of diesel and the case for producing gasoline with increased output of propylene. The performance of the MIP units that were in operation was wrapped up. Test results have shown that the MIP technology is characterized by improved product distribution as evidenced by the reduced yields of dry gas and slurry and the increased total liquid yield; the upgraded product quality as evidenced by the reduced olefin and sulphur contents in gasoline; and the more ideal techno-economic indicators as evidenced by the reduced unit consumption of catalyst and the reduced energy consumption of the process unit.展开更多
This paper has developed a measurement approach that integrates price with the product technical content initiated by Lall et al.(2006),i.e.,dividing HS6-quantile products into high-end,middle-end and low-end levels t...This paper has developed a measurement approach that integrates price with the product technical content initiated by Lall et al.(2006),i.e.,dividing HS6-quantile products into high-end,middle-end and low-end levels through the quantile ranking of prices of the same product from different countries or regions in a target market.Our estimation has discovered that due to the lack of product price differentiation,traditional method for the measurement of product technical content overestimated technical content of the low-end segment in the same category of products while underestimated technical content of the high-end segment in the same category of products.Re-calculation based on Rodric's result indicates that specialness of Chinese exports is mainly reflected by high-end and middle-end products.In addition,the competition result of the sophistication of Chinese exports indicates that since the middle of the 1990 s,the sophistication of Chinese exports has remained relatively low compared with the average level of the world and developing countries;from an economic perspective,improvement in the sophistication of Chinese exports primarily derived from middle-end and low-end products;from a category-specific perspective,improvement in the sophistication of Chinese exports primarily derived from low-technology export products.展开更多
In November 2022,the emergence of ChatGPT brought unprecedented attention to AIGC(Artificial Intelligence Generated Content).OpenATs ChatGPT sparked a global sensation;Google followed closely with Bard;and Baidu launc...In November 2022,the emergence of ChatGPT brought unprecedented attention to AIGC(Artificial Intelligence Generated Content).OpenATs ChatGPT sparked a global sensation;Google followed closely with Bard;and Baidu launched its“domestic version of ChatGPT,”ERNIE Bot(also known as Wenxin Yiyan).In fact,even before the birth of ChatGPT,AIGC technology had already been widely applied,driving a new revolution in content production and bringing about deep changes in the media ecosystem.Everyone is a media producer,everything is media,and the flow of information is like rivers converging,expanding the boundaries of media into every comer.As the watchful eyes of the era,mainstream media stands at the forefront of the digital wave,facing unprecedented challenges.展开更多
The relationships among desiccation sensitivities of Antiaris toxicaria seeds and axes, changes in activities of superoxide dismutase （SOD）, ascorbate peroxidase （APX）, catalase （CAT）, glutathione reductase （GR...The relationships among desiccation sensitivities of Antiaris toxicaria seeds and axes, changes in activities of superoxide dismutase （SOD）, ascorbate peroxidase （APX）, catalase （CAT）, glutathione reductase （GR） and dehydroascorbate reductase, （DHAR）, production rate of superoxide radical （.O2^-）, and the contents of hydrogen peroxide （H2O2） and thiobarbituric acid （TBA）-reactive substance were studied. Desiccation tolerance of seeds and axes decreased with dehydration. Desiccation tolerance of axes was higher than that of seeds, and that of epicotyls was higher than radicles. Activities of SOD, CAT and DHAR of seeds increased during the initial phase of dehydration, and then decreased with further dehydration, whereas activities of APX and GR decreased with dehydration. These five enzyme activities of axes, however, increased during the initial phase of dehydration, and then decreased with further dehydration. The rate of superoxide radical production, and the contents of H2O2 and TBA-reacUve products of seeds and axes gradually increased with dehydration. These results show that the A. toxicaria seed is a typical recalcitrant seed. Loss of desiccation tolerance in seeds and axes was correlated with the increase in .O2- production rate, content of H2O2 and TBA-reactive products, and the decline of antioxidant enzyme activities of seeds and axes.展开更多
文摘This paper conducts an in-depth analysis of the cost-benefit relationship in content production and dissemination within the media industry,combining theoretical frameworks with empirical case studies.It begins by examining the current development status and trends of the media industry,highlighting the transformative shift from traditional to new media,technological-driven innovations,and globalization.The study then delves into the economic characteristics of media products,market structure theories,and the application of cost-benefit analysis in enterprise management.Detailed cost analyses cover both direct costsand indirect costs in content production,as well as channel construction costs and promotion costs in content dissemination.Key influencing factors,such as content type,production scale,target audience,and communication timing,are systematically discussed.The benefit analysis evaluates economic impacts and social impacts.A case study of ByteDance illustrates practical applications of cost control strategies and benefit enhancement measures.Finally,the paper proposes strategic recommendations for optimizing content production,innovating dissemination approaches,and strengthening cost-benefit evaluation mechanisms.It concludes with an acknowledgment of research limitations and outlines future research directions,emphasizing longitudinal tracking and global comparative studies.
基金Funded by the National Natural Science Foundation of China(No. 90715041)Outstanding Youth Science Fund of Henan Province(No.04120002300)
文摘By micro- and macro-observations, the deterioration mechanisms of concrete under alternate action between repeated sub-high temperature/cooling by water and sodium sulfate solution attack （TW-SA） were studied; meanwhile, the single sodium sulfate solution attack （SA） was also done as comparison. Micro-observations included the analysis of attack products by thermal analysis method and the determination of sulfate-ion content from surface to interior by chemical titrating method （modified barium sulfate gravimetric method）. Macro-observations mainly included the mechanical behaviors such as compressive strength, splitting strength. The experimental results indicate, in both cases, the main attack product is ettringite, only in the first layer of case SA some gypsum is checked; in case SA, the sulfate ions mainly concentrate in the surface layer, so the attack is relatively mild; but in case TW-SA, the repeated sub-high temperature/cooling by water promotes the sulfate ions diffusing inwards, which leads to obvious strength degradation.
文摘This article introduces the specifics of the MIP technology involving respectively the case for production of clean gasoline, the case for producing clean gasoline coupled with production of diesel and the case for producing gasoline with increased output of propylene. The performance of the MIP units that were in operation was wrapped up. Test results have shown that the MIP technology is characterized by improved product distribution as evidenced by the reduced yields of dry gas and slurry and the increased total liquid yield; the upgraded product quality as evidenced by the reduced olefin and sulphur contents in gasoline; and the more ideal techno-economic indicators as evidenced by the reduced unit consumption of catalyst and the reduced energy consumption of the process unit.
基金an outcome of annual program under the Fundamental Research Funds for the Centrally-Administered Universities(Approval No.JBK130936)Research on the Upgrade Mechanism of Chinese Export Productssponsored by the Fundamental Research Funds for the Centrally-Administered Universitiesa contribution to the Third China Trade Research Group(CTRG) Conference
文摘This paper has developed a measurement approach that integrates price with the product technical content initiated by Lall et al.(2006),i.e.,dividing HS6-quantile products into high-end,middle-end and low-end levels through the quantile ranking of prices of the same product from different countries or regions in a target market.Our estimation has discovered that due to the lack of product price differentiation,traditional method for the measurement of product technical content overestimated technical content of the low-end segment in the same category of products while underestimated technical content of the high-end segment in the same category of products.Re-calculation based on Rodric's result indicates that specialness of Chinese exports is mainly reflected by high-end and middle-end products.In addition,the competition result of the sophistication of Chinese exports indicates that since the middle of the 1990 s,the sophistication of Chinese exports has remained relatively low compared with the average level of the world and developing countries;from an economic perspective,improvement in the sophistication of Chinese exports primarily derived from middle-end and low-end products;from a category-specific perspective,improvement in the sophistication of Chinese exports primarily derived from low-technology export products.
文摘In November 2022,the emergence of ChatGPT brought unprecedented attention to AIGC(Artificial Intelligence Generated Content).OpenATs ChatGPT sparked a global sensation;Google followed closely with Bard;and Baidu launched its“domestic version of ChatGPT,”ERNIE Bot(also known as Wenxin Yiyan).In fact,even before the birth of ChatGPT,AIGC technology had already been widely applied,driving a new revolution in content production and bringing about deep changes in the media ecosystem.Everyone is a media producer,everything is media,and the flow of information is like rivers converging,expanding the boundaries of media into every comer.As the watchful eyes of the era,mainstream media stands at the forefront of the digital wave,facing unprecedented challenges.
基金Supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (KSCX2-YW-Z-058)the National Natural Science Foundation of China (30470183).
文摘The relationships among desiccation sensitivities of Antiaris toxicaria seeds and axes, changes in activities of superoxide dismutase （SOD）, ascorbate peroxidase （APX）, catalase （CAT）, glutathione reductase （GR） and dehydroascorbate reductase, （DHAR）, production rate of superoxide radical （.O2^-）, and the contents of hydrogen peroxide （H2O2） and thiobarbituric acid （TBA）-reactive substance were studied. Desiccation tolerance of seeds and axes decreased with dehydration. Desiccation tolerance of axes was higher than that of seeds, and that of epicotyls was higher than radicles. Activities of SOD, CAT and DHAR of seeds increased during the initial phase of dehydration, and then decreased with further dehydration, whereas activities of APX and GR decreased with dehydration. These five enzyme activities of axes, however, increased during the initial phase of dehydration, and then decreased with further dehydration. The rate of superoxide radical production, and the contents of H2O2 and TBA-reacUve products of seeds and axes gradually increased with dehydration. These results show that the A. toxicaria seed is a typical recalcitrant seed. Loss of desiccation tolerance in seeds and axes was correlated with the increase in .O2- production rate, content of H2O2 and TBA-reactive products, and the decline of antioxidant enzyme activities of seeds and axes.
