To increase the passenger transferring efficiency, the bus coordination holding control for transit hubs, which is as an important dynamic dispatching method for improving the service level of transit hubs, was studie...To increase the passenger transferring efficiency, the bus coordination holding control for transit hubs, which is as an important dynamic dispatching method for improving the service level of transit hubs, was studied in the framework of bus coordination dispatching mode. Firstly, the bus coordination holding control flow was studied based on Advanced Public Transportation Systems (APTS) environment. Then a control model was presented to optimize the bus vehicle holding time, and a genetic algorithm was designed as the solving method. In the end, an example was given to illustrate the effectiveness of the control strategy and the algorithm.展开更多
Sequencing technology has developed rapidly in recent years. Complete or nearly complete mitochondrial genomes(mitogenomes) of 155 species from 47 families in Heteroptera have been sequenced. However, the amounts of m...Sequencing technology has developed rapidly in recent years. Complete or nearly complete mitochondrial genomes(mitogenomes) of 155 species from 47 families in Heteroptera have been sequenced. However, the amounts of mitogenomes between those families are unbalanced, which makes it difficult to correctly discern the patterns of mitogenome rearrangement in Heteroptera. Among 21 species from ten families, ten variations in mitogenome rearrangement had been previously reported, among which the translocation between tRNA-Thr and tRNA-Pro was considered as a synapomorphy of Pyrrhocoroidea based on two mitogenomes. As only one mitogenome in each of Largidae and Pyrrhocoridae had been sequenced to conclude the synapomorphy, more mitogenomes of Pyrrhocoroidea need to be explored. In this study, additional two mitogenomes of Pyrrhocoroidea(Macrocheraia grandis grandis(Gray, 1832) and Myrmoplasta mira Gerst-cker, 1892) were sequenced. Both of them also possess the same translocation between tRNA-Thr and tRNA-Pro, which reaffirms that this kind of rearrangement is a molecular synapomorphy of Pyrrhocoroidea. Moreover, we discovered a more complex rearrangement in Myrmoplasta mira, in which six nearly identical duplications of tRNA-Thr were found located downstream of tRNA-Pro. Considering the high biodiversity of Heteroptera, more mitogenomic studies are needed to improve our knowledge about mitogenome rearrangements and the potential synapomorphies.展开更多
Digital technologies offer unprecedented opportunities in addressing climate change as public policy requirements increasingly pervade national boundaries. Health issues now merge with those in education, the environm...Digital technologies offer unprecedented opportunities in addressing climate change as public policy requirements increasingly pervade national boundaries. Health issues now merge with those in education, the environment, energy, culture, gender, security, and the economy. They offer enormous potential in mobilizing for political action. But they also have a dark side. Outgoing U.S. President Barack Obama issued a warning that social media in particular poses an existential threat to democracy. Their pervasive influence during the 2016 American presidential election highlighted the potential for the spread of fake news and alternative facts. These realities must be recognized and addressed if meaningful policies on climate change and future sustainability are to be achieved. The challenges ahead require a re-examination of overarching trends in mass media that date back to the middle of the last century. Warnings from scientists, scholars, and community activists indicate that, on the issue of climate change, time is running out. In his Encyclical on Climate Change and Inequality, Pope Francis amplified the urgent call to action. But collectively, we need to rethink the profit driven ways in which our proliferating digital technologies mitigate potential steps toward a sustainable future. In a myriad of forms that go well beyond the seductive and addicting trends of endless hours spent online, new and proliferating digital toys and gadgets are neither carbon neutral, nor as some proponents would have us believe, do they hold the sole promise of innovation and job creation. Additionally, their potential must be harnessed to maintain rather than disrupt social stability.展开更多
Fostering the use of transit has been broadly accepted as an effective way to improve social equity and reduce the externalities caused by transportation. In the great body of transit literature, many have focused on ...Fostering the use of transit has been broadly accepted as an effective way to improve social equity and reduce the externalities caused by transportation. In the great body of transit literature, many have focused on the improvement of transfer efficiency. However, investigation on transit transfer efficiency is still lacking for medium sized cities or suburban areas that have sprawled from city centers. The special features associated with such an urban form lead to unique travel patterns and bus operations. This work develops a process to improve bus transfer efficiency for small conurbations considering their special characteristics. A case study of New York's Capital District is used to illustrate the proposed method. Results show that the transfer waiting time can be remarkably shortened. The proposed method can be widely adapted to other transit systems in small conurbations.展开更多
This study explores the aesthetic dimensions of Kwame Nkrumah's cultural policies in the creation of Ghana's Presidential Seats and the State Sword. The study is an Art Historical research situated within the qualit...This study explores the aesthetic dimensions of Kwame Nkrumah's cultural policies in the creation of Ghana's Presidential Seats and the State Sword. The study is an Art Historical research situated within the qualitative research paradigm. It had a population of a defmed class of cultural policy makers, art historians, traditional rulers, nationalists, visual artists and Ghanaians resident both in and outside Ghana. The study examined how the creation of Ghana's Presidential Seats and the State Sword were influenced by Kwame Nkrumah's cultural policies and the cultural significance of the aesthetic interplay of ethnic insignias used in capturing the Ghanaian concept of Political authority. The study revealed that, Nkrumah recognised the cultural art forms and elements of ethnic Ghana as assets for national development. In line with his policy of building the Nation State of Ghana, he used ethnic cultural art forms and elements. At independence, Nkrumah commissioned some visual artist to create some artistic pieces (politico-cultural artefacts) for the Ghanaian political authority with inspiration or based on what pertains in the traditional authority (Chieftaincy) of Ghana. Politico-cultural artefacts as used in this study refer to the artefacts produced based on the cultural concepts of the ethnic states for the use of the political authority of the Republic of Ghana. Among these artistic pieces are the three Presidential Seats, The State Sword, The President's Personal Standard Pole and the State Mace.展开更多
As a Chinese medicinal plant,Smilax china is traditionally used in the treatment of pelvic inflammatory disease(PID).Flavonoids have been identified as the anti-inflammatory bioactive fraction.However,the high content...As a Chinese medicinal plant,Smilax china is traditionally used in the treatment of pelvic inflammatory disease(PID).Flavonoids have been identified as the anti-inflammatory bioactive fraction.However,the high content of total flavonoids has not been extracted from S.china.The therapeutic effects and mechanisms of total flavonoids are still unknown.In the present study,we aimed to obtain the effective parts of flavonoids in S.china,and elucidate the mechanism of action on PID.The anti-inflammatory effect was evaluated on phenol mucilage-induced pelvic inflammation in rats.This was the first time that total flavonoids in high concentration(up to 55.6%)were obtained in S.china.A total of 15 compounds were separated and identified by NMR,and the total flavonoids were detected with HPLC.TFSC caused a reduction in serum levels of IL-6 and IL-1β.These results suggested that TFSC had a significant anti-PID effect,probably due to inhibition of the inflammatory reaction.展开更多
This paper considers a buyer's procuring strategy where the buyer purchases products from a supplier in order to minimize his total cost. Assume that the customer arrivals follow a Poisson process, a base-stock polic...This paper considers a buyer's procuring strategy where the buyer purchases products from a supplier in order to minimize his total cost. Assume that the customer arrivals follow a Poisson process, a base-stock policy is implemented by the buyer, and the supplier will afford partial operating cost incurred by the buyer; The cost shared by the buyer includes procuring cost and some operating cost; The supplier does not hold the inventory and her production time is exponentially distributed. The objective of the supplier is to maximize her profit. The buyer designs a contract to minimize his total expected cost. Two different cases are considered: One potential supplier and many competing suppliers. The optimal control approaches are used to design the buyer's optimal mechanism and some simple procurement mechanisms are presented.展开更多
Lately,Tianlun International Hotels announced the appointment of Claudia Jiang as PR Director.Jiang will take charge of branding promotion and public relations,as well as brand management of Tianlun International Hote...Lately,Tianlun International Hotels announced the appointment of Claudia Jiang as PR Director.Jiang will take charge of branding promotion and public relations,as well as brand management of Tianlun International Hotels.Jiang graduated from the Beijing International Studies University and worked in HK CTS Hotels Co.Ltd.,responsible for brand standard establishment,public relations,new media applications,events,exhibitions,advertisements and promotions.展开更多
基金Sponsored by the National Natural Science Foundation of China (Grant No. 70601022)the National Basic Research Program of China (Grant No.2006CB705505)
文摘To increase the passenger transferring efficiency, the bus coordination holding control for transit hubs, which is as an important dynamic dispatching method for improving the service level of transit hubs, was studied in the framework of bus coordination dispatching mode. Firstly, the bus coordination holding control flow was studied based on Advanced Public Transportation Systems (APTS) environment. Then a control model was presented to optimize the bus vehicle holding time, and a genetic algorithm was designed as the solving method. In the end, an example was given to illustrate the effectiveness of the control strategy and the algorithm.
基金financially supported by the Ministry of Culture of the Czech Republic(DKRVO 2019/5.I.a,National Museum,00023272)
文摘Sequencing technology has developed rapidly in recent years. Complete or nearly complete mitochondrial genomes(mitogenomes) of 155 species from 47 families in Heteroptera have been sequenced. However, the amounts of mitogenomes between those families are unbalanced, which makes it difficult to correctly discern the patterns of mitogenome rearrangement in Heteroptera. Among 21 species from ten families, ten variations in mitogenome rearrangement had been previously reported, among which the translocation between tRNA-Thr and tRNA-Pro was considered as a synapomorphy of Pyrrhocoroidea based on two mitogenomes. As only one mitogenome in each of Largidae and Pyrrhocoridae had been sequenced to conclude the synapomorphy, more mitogenomes of Pyrrhocoroidea need to be explored. In this study, additional two mitogenomes of Pyrrhocoroidea(Macrocheraia grandis grandis(Gray, 1832) and Myrmoplasta mira Gerst-cker, 1892) were sequenced. Both of them also possess the same translocation between tRNA-Thr and tRNA-Pro, which reaffirms that this kind of rearrangement is a molecular synapomorphy of Pyrrhocoroidea. Moreover, we discovered a more complex rearrangement in Myrmoplasta mira, in which six nearly identical duplications of tRNA-Thr were found located downstream of tRNA-Pro. Considering the high biodiversity of Heteroptera, more mitogenomic studies are needed to improve our knowledge about mitogenome rearrangements and the potential synapomorphies.
文摘Digital technologies offer unprecedented opportunities in addressing climate change as public policy requirements increasingly pervade national boundaries. Health issues now merge with those in education, the environment, energy, culture, gender, security, and the economy. They offer enormous potential in mobilizing for political action. But they also have a dark side. Outgoing U.S. President Barack Obama issued a warning that social media in particular poses an existential threat to democracy. Their pervasive influence during the 2016 American presidential election highlighted the potential for the spread of fake news and alternative facts. These realities must be recognized and addressed if meaningful policies on climate change and future sustainability are to be achieved. The challenges ahead require a re-examination of overarching trends in mass media that date back to the middle of the last century. Warnings from scientists, scholars, and community activists indicate that, on the issue of climate change, time is running out. In his Encyclical on Climate Change and Inequality, Pope Francis amplified the urgent call to action. But collectively, we need to rethink the profit driven ways in which our proliferating digital technologies mitigate potential steps toward a sustainable future. In a myriad of forms that go well beyond the seductive and addicting trends of endless hours spent online, new and proliferating digital toys and gadgets are neither carbon neutral, nor as some proponents would have us believe, do they hold the sole promise of innovation and job creation. Additionally, their potential must be harnessed to maintain rather than disrupt social stability.
文摘Fostering the use of transit has been broadly accepted as an effective way to improve social equity and reduce the externalities caused by transportation. In the great body of transit literature, many have focused on the improvement of transfer efficiency. However, investigation on transit transfer efficiency is still lacking for medium sized cities or suburban areas that have sprawled from city centers. The special features associated with such an urban form lead to unique travel patterns and bus operations. This work develops a process to improve bus transfer efficiency for small conurbations considering their special characteristics. A case study of New York's Capital District is used to illustrate the proposed method. Results show that the transfer waiting time can be remarkably shortened. The proposed method can be widely adapted to other transit systems in small conurbations.
文摘This study explores the aesthetic dimensions of Kwame Nkrumah's cultural policies in the creation of Ghana's Presidential Seats and the State Sword. The study is an Art Historical research situated within the qualitative research paradigm. It had a population of a defmed class of cultural policy makers, art historians, traditional rulers, nationalists, visual artists and Ghanaians resident both in and outside Ghana. The study examined how the creation of Ghana's Presidential Seats and the State Sword were influenced by Kwame Nkrumah's cultural policies and the cultural significance of the aesthetic interplay of ethnic insignias used in capturing the Ghanaian concept of Political authority. The study revealed that, Nkrumah recognised the cultural art forms and elements of ethnic Ghana as assets for national development. In line with his policy of building the Nation State of Ghana, he used ethnic cultural art forms and elements. At independence, Nkrumah commissioned some visual artist to create some artistic pieces (politico-cultural artefacts) for the Ghanaian political authority with inspiration or based on what pertains in the traditional authority (Chieftaincy) of Ghana. Politico-cultural artefacts as used in this study refer to the artefacts produced based on the cultural concepts of the ethnic states for the use of the political authority of the Republic of Ghana. Among these artistic pieces are the three Presidential Seats, The State Sword, The President's Personal Standard Pole and the State Mace.
基金The Science and Technology Department of Jiangxi Province(Grant No.20192ACB20016,20165BCB18006,20172BCB22010,GJJ201214)the National Natural Science Foundation of China(NSFC,Grant No.8150640)。
文摘As a Chinese medicinal plant,Smilax china is traditionally used in the treatment of pelvic inflammatory disease(PID).Flavonoids have been identified as the anti-inflammatory bioactive fraction.However,the high content of total flavonoids has not been extracted from S.china.The therapeutic effects and mechanisms of total flavonoids are still unknown.In the present study,we aimed to obtain the effective parts of flavonoids in S.china,and elucidate the mechanism of action on PID.The anti-inflammatory effect was evaluated on phenol mucilage-induced pelvic inflammation in rats.This was the first time that total flavonoids in high concentration(up to 55.6%)were obtained in S.china.A total of 15 compounds were separated and identified by NMR,and the total flavonoids were detected with HPLC.TFSC caused a reduction in serum levels of IL-6 and IL-1β.These results suggested that TFSC had a significant anti-PID effect,probably due to inhibition of the inflammatory reaction.
文摘This paper considers a buyer's procuring strategy where the buyer purchases products from a supplier in order to minimize his total cost. Assume that the customer arrivals follow a Poisson process, a base-stock policy is implemented by the buyer, and the supplier will afford partial operating cost incurred by the buyer; The cost shared by the buyer includes procuring cost and some operating cost; The supplier does not hold the inventory and her production time is exponentially distributed. The objective of the supplier is to maximize her profit. The buyer designs a contract to minimize his total expected cost. Two different cases are considered: One potential supplier and many competing suppliers. The optimal control approaches are used to design the buyer's optimal mechanism and some simple procurement mechanisms are presented.
文摘Lately,Tianlun International Hotels announced the appointment of Claudia Jiang as PR Director.Jiang will take charge of branding promotion and public relations,as well as brand management of Tianlun International Hotels.Jiang graduated from the Beijing International Studies University and worked in HK CTS Hotels Co.Ltd.,responsible for brand standard establishment,public relations,new media applications,events,exhibitions,advertisements and promotions.