随着“21世纪海上丝绸之路”倡议的提出,我国港口企业迎来了新的发展和机遇,对境外港口进行投资区位选择是其发展的关键问题。在此背景下,文章基于栅格法选出港口投资备选区域,在自然条件、腹地经济环境、投资环境、合作基础、港航交通...随着“21世纪海上丝绸之路”倡议的提出,我国港口企业迎来了新的发展和机遇,对境外港口进行投资区位选择是其发展的关键问题。在此背景下,文章基于栅格法选出港口投资备选区域,在自然条件、腹地经济环境、投资环境、合作基础、港航交通区位等方面基础上,引入可达性模型测度评价对象的陆向区位价值和海向区位价值,构建港口投资指数评价体系,最后利用优劣解距离法(Technique for Order Preference by Similarity to an Ideal Solution, TOPSIS)计算备选区域的投资指数。研究表明,位于马六甲海峡东入口附近区域和位于印度洋的斯里兰卡区域最具投资价值。展开更多
AIM： To assess gallbladder emptying and its association with cholecystitis and abdominal pain in patients with primary sclerosing cholangitis （PSC）. METHODS： Twenty patients with PSC and ten healthy subjects were ...AIM： To assess gallbladder emptying and its association with cholecystitis and abdominal pain in patients with primary sclerosing cholangitis （PSC）. METHODS： Twenty patients with PSC and ten healthy subjects were investigated. Gallbladder fasting volume, ejection fraction and residual volume after ingestion of a test meal were compared in patients with PSC and healthy controls using magnetic resonance imaging. Symptoms, thickness and contrast enhancement of the gallbladder wall and the presence of cystic duct strictures were also assessed. RESULTS： Median fasting gallbladder volume in patients with PSC [67 （19-348） mL] was twice that in healthy controls [32 （16-55） mL] （P 〈 0.05）. The median postprandial gallbladder volume in patients with PSC was significantly larger than that in healthy controls （P 〈 0.05）. There was no difference in ejection fraction, gallbladder emptying volume or mean thickness of the gallbladder wall between PSC patients and controls. Contrast enhancement of the gallbladder wall in PSC patients was higher than that in controls; （69% ± 32%） and （42% ± 21%） （P 〈 0.05）. No significant association was found between the gallbladder volumes and occurrence of abdominal pain in patients and controls.CONCLUSION： Patients with PSC have increased fasting gallbladder volume. Gallbladder Mucosal dysfunction secondary to chronic cholecystitis, may be a possible mechanism for increased gallbladder.展开更多
The market concentration of selected 24 container port/terminal in the Middle East region was evaluated. Data collected for 6 years （2009-2014）, HHI （Herfindahl-Hirschman index technique） was used to analyse the m...The market concentration of selected 24 container port/terminal in the Middle East region was evaluated. Data collected for 6 years （2009-2014）, HHI （Herfindahl-Hirschman index technique） was used to analyse the market behaviour and the movement of the market towards monopoly or to lead to PPC （pure and perfect competition）. Based on the above, by analyzing the defined market data, it was found to be a promising market and tends to competition. Of course, this serves the interest of the client, which is the efficiency and speed of cargo handling safely and at the lowest cost.展开更多
Strategic planning is one of the most important management tools for organizational decision making. The nuclear area represents a segment of energy production used by many countries in America, Europe and Asia. It is...Strategic planning is one of the most important management tools for organizational decision making. The nuclear area represents a segment of energy production used by many countries in America, Europe and Asia. It is known that in the future nuclear energy can be a major exit to the global energy crisis. The aim of this research was to use the BSC （Balanced Scorecard） as a strategic tool for decision making in a teaching and research institution of the nuclear area--IPEN （Nuclear and Energy Research Institute）, located in the city of Sao Paulo, which belongs to the CNEN （National Nuclear Energy Commission） in Brazil. The methodology used in this academic doctoral study was a case study, which considered the period of research from December 2012 to December 2015. The main results expected from this case study are： the improvement of information flow, the view, the increased visibility of an organization providing education and especially research in relation to published works, increased interaction among IPEN and the main global research institutes and centers, increasing academic production of technical articles, indicator improvement, improving the monitoring of management actions, among others. Given the expected results one can conclude that this study will be of great value to the IPEN and also for the Brazilian energy sector, as it will allow and contribute to the dissemination and demystification of nuclear power as an energy source of mankind, its peaceful applications and for the management activity of knowledge and innovation production in the nuclear area of IPEN.展开更多
The geographical location makes the port of Livorno one of the most important in Italy. The port, in fact, benefits of an extended network of roads and rails connecting it with the rest of Italy, and central and south...The geographical location makes the port of Livorno one of the most important in Italy. The port, in fact, benefits of an extended network of roads and rails connecting it with the rest of Italy, and central and southern Europe as well. The history of Livorno and its port is inextricably linked to that of Pisa and Florence, and to the complexity of events that determined the political set-up of the region along several centuries. Looking at the new port plan of Livorno has made it necessary an extensive overview of the history of both the port, and of its planning. This analysis has allowed： to understand the reason for the different choices made in the past for the development of the port, highlighting, when necessary, the errors made; to identify the strengths and weaknesses of the existing port infrastructure; to identify the works needed to boost the port in the European context. The purpose of this paper is to provide a summary of the analysis performed for the implementation of the new Livorno port plan 2010 and show how the port planning in Italy is often conditioned by hundreds of centuries of history.展开更多
In order to study the seismic performance of typical approach bridge for port project, the seismic vulnerability model was created. 100 of the earthquake motion records are selected from the database of Pacific Earthq...In order to study the seismic performance of typical approach bridge for port project, the seismic vulnerability model was created. 100 of the earthquake motion records are selected from the database of Pacific Earthquake Research Centre, In order to obtain the maximum responses of structure dynamic response, the model was calculated by using non-linear time history analysis. Then reliability analysis method was used to generate the fragility curves of bridge components. And compared two kinds of bearing made differences to structure＇ s vulnerability. Researches show that bearing is easy to breakdown with earthquake action. Isolation bearing has good effect, and significantly reduces failure probability, fmaUy the fragility curves obtained can be used to evaluate the seismic performance of continuous beam bridge for port project, and provide the basis for seismic design of bridges for port project.展开更多
This paper deals with linear refraction-difractional and nonlinear dispersion mathematical models for simulation of low-frequency waves in port areas of various configurations. The phenomenon of resonance can be obser...This paper deals with linear refraction-difractional and nonlinear dispersion mathematical models for simulation of low-frequency waves in port areas of various configurations. The phenomenon of resonance can be observed in multiple places and pose a significant danger for ships and constructions. Generally, if the bottom relief is non-uniform and if inner/outer boundaries of protected areas are configurated in a complex way, the problem can be solved only by numerical methods. It presents the calculation results for the amplitude of infragravity waves at resonance frequencies. The paper highlights the solutions for diminishing the amplitude of resonance water fluctuations in port areas. In particular, it is noted that if a number of certain conditions is provided outside the protected area, it is possible to diminish substantially the height of infragravity waves inside the area. The validity of such an assumption is confirmed by calculations.展开更多
Knowing the level of efficiency of investment applied in ports of Mexico is relevant information for the design of port policies that contribute to its development and thus to greater freight movement. The objective o...Knowing the level of efficiency of investment applied in ports of Mexico is relevant information for the design of port policies that contribute to its development and thus to greater freight movement. The objective of this paper is to analyze the technical efficiency obtained from International Mexican Ports, through the use of the technique of Data Envelopment Analysis （DEA）. It uses data regarding public and private investment in ports applied during the period 2000-2010 and its influence on the number of Twenty-foot Equivalent Unit （TEU）. Because it has been applied the DEA-CCR （the linear programming model） model input oriented, thus not only the efficiency is calculated in ports, but benchmarking is also obtained to determine the efficient ports that serve as reference to those who were found to be inefficient. The results obtained showed that Manzanillo and Progreso were the most efficient ports. On the other hand, the ports that were not efficient for any of the years reviewed were Mazatlan and Lazaro Cardenas. Generally, public investment has been increasing over the period, and public policies are not designed to allow the ports to have an international projection.展开更多
文摘随着“21世纪海上丝绸之路”倡议的提出,我国港口企业迎来了新的发展和机遇,对境外港口进行投资区位选择是其发展的关键问题。在此背景下,文章基于栅格法选出港口投资备选区域,在自然条件、腹地经济环境、投资环境、合作基础、港航交通区位等方面基础上,引入可达性模型测度评价对象的陆向区位价值和海向区位价值,构建港口投资指数评价体系,最后利用优劣解距离法(Technique for Order Preference by Similarity to an Ideal Solution, TOPSIS)计算备选区域的投资指数。研究表明,位于马六甲海峡东入口附近区域和位于印度洋的斯里兰卡区域最具投资价值。
文摘AIM： To assess gallbladder emptying and its association with cholecystitis and abdominal pain in patients with primary sclerosing cholangitis （PSC）. METHODS： Twenty patients with PSC and ten healthy subjects were investigated. Gallbladder fasting volume, ejection fraction and residual volume after ingestion of a test meal were compared in patients with PSC and healthy controls using magnetic resonance imaging. Symptoms, thickness and contrast enhancement of the gallbladder wall and the presence of cystic duct strictures were also assessed. RESULTS： Median fasting gallbladder volume in patients with PSC [67 （19-348） mL] was twice that in healthy controls [32 （16-55） mL] （P 〈 0.05）. The median postprandial gallbladder volume in patients with PSC was significantly larger than that in healthy controls （P 〈 0.05）. There was no difference in ejection fraction, gallbladder emptying volume or mean thickness of the gallbladder wall between PSC patients and controls. Contrast enhancement of the gallbladder wall in PSC patients was higher than that in controls; （69% ± 32%） and （42% ± 21%） （P 〈 0.05）. No significant association was found between the gallbladder volumes and occurrence of abdominal pain in patients and controls.CONCLUSION： Patients with PSC have increased fasting gallbladder volume. Gallbladder Mucosal dysfunction secondary to chronic cholecystitis, may be a possible mechanism for increased gallbladder.
文摘The market concentration of selected 24 container port/terminal in the Middle East region was evaluated. Data collected for 6 years （2009-2014）, HHI （Herfindahl-Hirschman index technique） was used to analyse the market behaviour and the movement of the market towards monopoly or to lead to PPC （pure and perfect competition）. Based on the above, by analyzing the defined market data, it was found to be a promising market and tends to competition. Of course, this serves the interest of the client, which is the efficiency and speed of cargo handling safely and at the lowest cost.
文摘Strategic planning is one of the most important management tools for organizational decision making. The nuclear area represents a segment of energy production used by many countries in America, Europe and Asia. It is known that in the future nuclear energy can be a major exit to the global energy crisis. The aim of this research was to use the BSC （Balanced Scorecard） as a strategic tool for decision making in a teaching and research institution of the nuclear area--IPEN （Nuclear and Energy Research Institute）, located in the city of Sao Paulo, which belongs to the CNEN （National Nuclear Energy Commission） in Brazil. The methodology used in this academic doctoral study was a case study, which considered the period of research from December 2012 to December 2015. The main results expected from this case study are： the improvement of information flow, the view, the increased visibility of an organization providing education and especially research in relation to published works, increased interaction among IPEN and the main global research institutes and centers, increasing academic production of technical articles, indicator improvement, improving the monitoring of management actions, among others. Given the expected results one can conclude that this study will be of great value to the IPEN and also for the Brazilian energy sector, as it will allow and contribute to the dissemination and demystification of nuclear power as an energy source of mankind, its peaceful applications and for the management activity of knowledge and innovation production in the nuclear area of IPEN.
文摘The geographical location makes the port of Livorno one of the most important in Italy. The port, in fact, benefits of an extended network of roads and rails connecting it with the rest of Italy, and central and southern Europe as well. The history of Livorno and its port is inextricably linked to that of Pisa and Florence, and to the complexity of events that determined the political set-up of the region along several centuries. Looking at the new port plan of Livorno has made it necessary an extensive overview of the history of both the port, and of its planning. This analysis has allowed： to understand the reason for the different choices made in the past for the development of the port, highlighting, when necessary, the errors made; to identify the strengths and weaknesses of the existing port infrastructure; to identify the works needed to boost the port in the European context. The purpose of this paper is to provide a summary of the analysis performed for the implementation of the new Livorno port plan 2010 and show how the port planning in Italy is often conditioned by hundreds of centuries of history.
文摘In order to study the seismic performance of typical approach bridge for port project, the seismic vulnerability model was created. 100 of the earthquake motion records are selected from the database of Pacific Earthquake Research Centre, In order to obtain the maximum responses of structure dynamic response, the model was calculated by using non-linear time history analysis. Then reliability analysis method was used to generate the fragility curves of bridge components. And compared two kinds of bearing made differences to structure＇ s vulnerability. Researches show that bearing is easy to breakdown with earthquake action. Isolation bearing has good effect, and significantly reduces failure probability, fmaUy the fragility curves obtained can be used to evaluate the seismic performance of continuous beam bridge for port project, and provide the basis for seismic design of bridges for port project.
文摘This paper deals with linear refraction-difractional and nonlinear dispersion mathematical models for simulation of low-frequency waves in port areas of various configurations. The phenomenon of resonance can be observed in multiple places and pose a significant danger for ships and constructions. Generally, if the bottom relief is non-uniform and if inner/outer boundaries of protected areas are configurated in a complex way, the problem can be solved only by numerical methods. It presents the calculation results for the amplitude of infragravity waves at resonance frequencies. The paper highlights the solutions for diminishing the amplitude of resonance water fluctuations in port areas. In particular, it is noted that if a number of certain conditions is provided outside the protected area, it is possible to diminish substantially the height of infragravity waves inside the area. The validity of such an assumption is confirmed by calculations.
文摘Knowing the level of efficiency of investment applied in ports of Mexico is relevant information for the design of port policies that contribute to its development and thus to greater freight movement. The objective of this paper is to analyze the technical efficiency obtained from International Mexican Ports, through the use of the technique of Data Envelopment Analysis （DEA）. It uses data regarding public and private investment in ports applied during the period 2000-2010 and its influence on the number of Twenty-foot Equivalent Unit （TEU）. Because it has been applied the DEA-CCR （the linear programming model） model input oriented, thus not only the efficiency is calculated in ports, but benchmarking is also obtained to determine the efficient ports that serve as reference to those who were found to be inefficient. The results obtained showed that Manzanillo and Progreso were the most efficient ports. On the other hand, the ports that were not efficient for any of the years reviewed were Mazatlan and Lazaro Cardenas. Generally, public investment has been increasing over the period, and public policies are not designed to allow the ports to have an international projection.
