When the molecular ions XYZ＋ （XY2＋） are excited simultaneously from an electronic state E0 into two higher electronic states Ea and EZ with supervened dissociation or predisso- ciation, competition between the α ...When the molecular ions XYZ＋ （XY2＋） are excited simultaneously from an electronic state E0 into two higher electronic states Ea and EZ with supervened dissociation or predisso- ciation, competition between the α and β excitation-dissociation channels occurs. A the- oretical model is provided to deal with the competition of the two excitation-dissociation channels with more than two kinds of ionic products for XYZ＋ （XY2＋）. Supposing that the photo-excitation rates of two states Eα and Eβ are much less than their dissociation or pre-dissociation rates, a theoretical equation can be deduced to fit the measured data, which reflects the dependence of the product branching ratios on the intensity ratios of two excitation lasers. From the fitted parameters the excitation cross section ratios are obtained. In experiment, we studied the competition between two excitation-dissociation channels of CO^2＋. By measuring the dependence of the product branching ratio on the intensity ratio of two dissociation lasers and fitting the experiment data with the theoretical equation, excitation cross section ratios were deduced.展开更多
Using the Cournot Game Model, this paper has analyzed the motivation of the distributors' alliance to gain competitive advantage in marketing channel. At first, this paper separately analyzed the advantage of alli...Using the Cournot Game Model, this paper has analyzed the motivation of the distributors' alliance to gain competitive advantage in marketing channel. At first, this paper separately analyzed the advantage of alliance in the situation of oneshort game and infinitely repeated game, then, based on the analysis of distributors' betrayal of the alliance under infinitely repeated game, the conditions to maintain the distributors alliance are put forward and discussed.展开更多
IEEE 802.11 distributed coordination function(DCF)can alleviate the collision and hidden station problem,but it doesn't differentiate traffic categories(TC).Therefore,it can't provide sufficient quality of ser...IEEE 802.11 distributed coordination function(DCF)can alleviate the collision and hidden station problem,but it doesn't differentiate traffic categories(TC).Therefore,it can't provide sufficient quality of service(QoS)support for different TC.Recently,a new contention-based enhanced distributed channel access(EDCA)scheme is proposed which provides a probabilistic QoS support.In this paper,an improved EDCA scheme for service differentiation in ad hoc networks is proposed.In this scheme,signal channel resistance coefficient is used to adjust the contention window(CW).It proves that the scheme provides the traffic differentiation,high throughput and low delay through simulation.展开更多
This paper looks at the professional and ethical failure of news organizations in reporting wars, conflicts, and crises Principles of press freedom, objectivity, and impartiality are not respected, and the journalism ...This paper looks at the professional and ethical failure of news organizations in reporting wars, conflicts, and crises Principles of press freedom, objectivity, and impartiality are not respected, and the journalism practice is different in times of war from in normal times. Very often, the news organization sides with the position of its country, and the journalist becomes ＂nationalistic＂ and ＂patriotic＂ and sides with his/her country＇s position towards the war at the expense of impartiality, objectivity, fairness, and ethics of journalism practices. Very often, the news media are used by the military and the political forces to frame wars and conflicts along the lines of the ＂national security＂ and ＂national interests＂. The second Gulf War, 9/11 events in 2001, the Afghan War, and the third Gulf War are used as case studies to assess the different kinds of mechanisms, techniques,＇and ＂rituals＂ practiced by the media to cover and report wars and conflicts to their audiences and world opinion. Results of the study suggest that an alternative theory--＂government press coalition theory＂——should be developed to explain journalism practices and behaviors during wars and conflicts.展开更多
At the present stage, The imported grape wine in China have hot market, imports increased year by year, high gross mar-gins, many brands, uneven quality, low market confidence, the price value of large deviations, imp...At the present stage, The imported grape wine in China have hot market, imports increased year by year, high gross mar-gins, many brands, uneven quality, low market confidence, the price value of large deviations, imperfect legislation, regulatory confusion and so on characters. The relevant departments and units should actively take a number of measures to improve the market of imported grape wine stably and healthy development. Believe in the future, its imports would continue to grow, the gross profit margin gradually would return to rational, the cost-effective products would be prevailing, the sales channels would be diversification, the enterprises in-volved would increase, and the industry competition would become increasingly fierce.展开更多
Manufacturers’channel competition with service is examined in this paper.Specifically,the authors consider channel competition within a supply chain comprising two manufacturers and one single retailer where each man...Manufacturers’channel competition with service is examined in this paper.Specifically,the authors consider channel competition within a supply chain comprising two manufacturers and one single retailer where each manufacturer can choose to sell its products either directly to the end market(online channel,say)or through the potential retail channel,based on the profit maximization criterion,which is influenced by exogenous market conditions,such as the degree of competition,etc.Furthermore,the retailer provides additional demand-enhancing service to promote the manufacturer’s products distributed via it.If only one of the manufacturers sells products through the retailer,its products will be promoted by the additional retail service,which poaches demand of products of the manufacturer who adopts direct online channel.Products of both manufacturers are supported by the retailer’s promotional service when both distribute their product through the common retailer.Finally,some managerial implications are derived from numerical analyses of our model,which explain the phenomena in practice and conclude the paper.展开更多
Objective： To determine the nature and extent of Iranian casualties by ballistic missile attacks during the eight years of the Iraq-Iran war. Methods： The data collected about Iraqi missile strikes on Iranian citie...Objective： To determine the nature and extent of Iranian casualties by ballistic missile attacks during the eight years of the Iraq-Iran war. Methods： The data collected about Iraqi missile strikes on Iranian cities included the following： date and time, number and type of missiles, cities targeted, and injuries and deaths resulting from impacts of missiles in civilian areas. The data were extracted from a database that was constructed by the army staff headquarters based on daily reports of Iranian army units during the war. Results： Over a period of eight years （1980-1988）, Iraqi army fired 533 ballistic missiles at Iranian territories. From those, 414 missiles （77.7%） landed on Iranian cities. The impacts of these missiles caused the deaths of 2 312 civilians and injured 11 625 others. Three types of ballistic missiles were used： FROG-7, Scud, and Al-Hussein （a modified version of the Scud missile）. Twenty-seven cities in Iran were struck by Iraqi ballistic missiles. The highest mortalities from ballistic missiles were in Dezful and Tehran. Iraqi missile attacks continued for 90 months （2 748 days）. Conclusion： Our results point to the necessity of investigating the psychological consequences of Iraqi ballistic missile attacks among survivors in 27 Iranian cities during the eight years of the Iraq-Iran war.展开更多
基金This work was supported by the National Natural Science Foundation of China （No.20673108）.
文摘When the molecular ions XYZ＋ （XY2＋） are excited simultaneously from an electronic state E0 into two higher electronic states Ea and EZ with supervened dissociation or predisso- ciation, competition between the α and β excitation-dissociation channels occurs. A the- oretical model is provided to deal with the competition of the two excitation-dissociation channels with more than two kinds of ionic products for XYZ＋ （XY2＋）. Supposing that the photo-excitation rates of two states Eα and Eβ are much less than their dissociation or pre-dissociation rates, a theoretical equation can be deduced to fit the measured data, which reflects the dependence of the product branching ratios on the intensity ratios of two excitation lasers. From the fitted parameters the excitation cross section ratios are obtained. In experiment, we studied the competition between two excitation-dissociation channels of CO^2＋. By measuring the dependence of the product branching ratio on the intensity ratio of two dissociation lasers and fitting the experiment data with the theoretical equation, excitation cross section ratios were deduced.
基金This work was supported by Natural science Foundation of China No. 70302017
文摘Using the Cournot Game Model, this paper has analyzed the motivation of the distributors' alliance to gain competitive advantage in marketing channel. At first, this paper separately analyzed the advantage of alliance in the situation of oneshort game and infinitely repeated game, then, based on the analysis of distributors' betrayal of the alliance under infinitely repeated game, the conditions to maintain the distributors alliance are put forward and discussed.
文摘IEEE 802.11 distributed coordination function(DCF)can alleviate the collision and hidden station problem,but it doesn't differentiate traffic categories(TC).Therefore,it can't provide sufficient quality of service(QoS)support for different TC.Recently,a new contention-based enhanced distributed channel access(EDCA)scheme is proposed which provides a probabilistic QoS support.In this paper,an improved EDCA scheme for service differentiation in ad hoc networks is proposed.In this scheme,signal channel resistance coefficient is used to adjust the contention window(CW).It proves that the scheme provides the traffic differentiation,high throughput and low delay through simulation.
文摘This paper looks at the professional and ethical failure of news organizations in reporting wars, conflicts, and crises Principles of press freedom, objectivity, and impartiality are not respected, and the journalism practice is different in times of war from in normal times. Very often, the news organization sides with the position of its country, and the journalist becomes ＂nationalistic＂ and ＂patriotic＂ and sides with his/her country＇s position towards the war at the expense of impartiality, objectivity, fairness, and ethics of journalism practices. Very often, the news media are used by the military and the political forces to frame wars and conflicts along the lines of the ＂national security＂ and ＂national interests＂. The second Gulf War, 9/11 events in 2001, the Afghan War, and the third Gulf War are used as case studies to assess the different kinds of mechanisms, techniques,＇and ＂rituals＂ practiced by the media to cover and report wars and conflicts to their audiences and world opinion. Results of the study suggest that an alternative theory--＂government press coalition theory＂——should be developed to explain journalism practices and behaviors during wars and conflicts.
文摘At the present stage, The imported grape wine in China have hot market, imports increased year by year, high gross mar-gins, many brands, uneven quality, low market confidence, the price value of large deviations, imperfect legislation, regulatory confusion and so on characters. The relevant departments and units should actively take a number of measures to improve the market of imported grape wine stably and healthy development. Believe in the future, its imports would continue to grow, the gross profit margin gradually would return to rational, the cost-effective products would be prevailing, the sales channels would be diversification, the enterprises in-volved would increase, and the industry competition would become increasingly fierce.
基金partially supported by the National Science Foundation of China under Grant No.71090401/71090400
文摘Manufacturers’channel competition with service is examined in this paper.Specifically,the authors consider channel competition within a supply chain comprising two manufacturers and one single retailer where each manufacturer can choose to sell its products either directly to the end market(online channel,say)or through the potential retail channel,based on the profit maximization criterion,which is influenced by exogenous market conditions,such as the degree of competition,etc.Furthermore,the retailer provides additional demand-enhancing service to promote the manufacturer’s products distributed via it.If only one of the manufacturers sells products through the retailer,its products will be promoted by the additional retail service,which poaches demand of products of the manufacturer who adopts direct online channel.Products of both manufacturers are supported by the retailer’s promotional service when both distribute their product through the common retailer.Finally,some managerial implications are derived from numerical analyses of our model,which explain the phenomena in practice and conclude the paper.
文摘Objective： To determine the nature and extent of Iranian casualties by ballistic missile attacks during the eight years of the Iraq-Iran war. Methods： The data collected about Iraqi missile strikes on Iranian cities included the following： date and time, number and type of missiles, cities targeted, and injuries and deaths resulting from impacts of missiles in civilian areas. The data were extracted from a database that was constructed by the army staff headquarters based on daily reports of Iranian army units during the war. Results： Over a period of eight years （1980-1988）, Iraqi army fired 533 ballistic missiles at Iranian territories. From those, 414 missiles （77.7%） landed on Iranian cities. The impacts of these missiles caused the deaths of 2 312 civilians and injured 11 625 others. Three types of ballistic missiles were used： FROG-7, Scud, and Al-Hussein （a modified version of the Scud missile）. Twenty-seven cities in Iran were struck by Iraqi ballistic missiles. The highest mortalities from ballistic missiles were in Dezful and Tehran. Iraqi missile attacks continued for 90 months （2 748 days）. Conclusion： Our results point to the necessity of investigating the psychological consequences of Iraqi ballistic missile attacks among survivors in 27 Iranian cities during the eight years of the Iraq-Iran war.
