The expansibility of PKI is expected to have the features that when the amount of user exceeds the system capacity, the users’ requirement can still be met by simply expanding the number of PKI entities and managemen...The expansibility of PKI is expected to have the features that when the amount of user exceeds the system capacity, the users’ requirement can still be met by simply expanding the number of PKI entities and management levels, and this expansion should be achieved smoothly from the original system. The upward, downward, and horizontal expansions of PKI are discussed in this paper. A path discovery method is suggested to reduce the effect of PKI expansion to the end entities, so as to enhance the availbility of PKI services.展开更多
For the suppliers of concerned services, theories about infrastructure pricing： SAT （Stand Alone economists such as Laffont, Tirole, etc. developed Test）, ECPR （Efficient Component Pricing Rule）. Especially, Sida...For the suppliers of concerned services, theories about infrastructure pricing： SAT （Stand Alone economists such as Laffont, Tirole, etc. developed Test）, ECPR （Efficient Component Pricing Rule）. Especially, Sidak, Spulber, put forward M-ECPR （Market Efficient Component Pricing Rule） method for bottleneck infrastructures. In this article, we bring the M-ECPR principles into the study of Chinese railways pricing of its network infrastructures. Combined with our Engineer Model and Opportunity Cost Model, we analyzed the special conditions faced by Chinese railways, and developed a model for sharing infrastructure fees among freight and passenger transportations. Engineer Model split Variable Cost （VC） and Fixed Cost （FC） into freight and passenger activities, and Opportunity Cost Model take the insufficient supply of infrastructure capacity into consideration. Of course, the subsidy from the government greatly affected the price standard for bottleneck facilities, or so-called network infrastructures.展开更多
The Cheng-Lan railway links Chengdu, a central city in Southwestern China, and Lanzhou, a central city in Northwestern China. The railway passes through the Longmenshan fault zone (Wenchuan earthquake happened there o...The Cheng-Lan railway links Chengdu, a central city in Southwestern China, and Lanzhou, a central city in Northwestern China. The railway passes through the Longmenshan fault zone (Wenchuan earthquake happened there on May 12, 2008), Minjiang fault zone, and Dongkunlun fault zone, which are all active. It runs over the Yangtze River and the Yellow River, and crosses high mountains and deep valleys. There exists, along the railway's alignment, different kinds of strata of hard granite and soft, weak metamorphic rocks such as carbonaceous slate, schist, and phyllite. It is, therefore, a key issue for such an infrastructure construction to assess the engineering geological conditions and risks, so as to mitigate or avoid possible georisks and to offer optional designs. Geological survey and georisk assessment along the railway corridor are carried out. Special attention is given to active faults, earthquakes and seismic zones. Based on these, discussions about geological aspects for route selection of the railway are conducted and countermeasures for georisk control are proposed accordingly. Main conclusions are achieved as follows: (1) Geohazards such as landslides, rockfalls and debries flows dominate both the route selection of the railway and the engineering structures (e.g., tunnels or bridges) adopted; (2) Tunnel has been proved to be an excellent structure for linear engineering in geologically active area; and (3) In the case where avoiding is impractical, necessary protection measures should be taken to engineering slopes in high earthquake intensity areas, especially the area with earthquake of Ms. 8 or greater.展开更多
Christian buildings in Shaanxi already have more than 1,300 years development history since the first church was built in Chang＇an in 635 AD. The Rapid development of Christian buildings started from 1840 due to the ...Christian buildings in Shaanxi already have more than 1,300 years development history since the first church was built in Chang＇an in 635 AD. The Rapid development of Christian buildings started from 1840 due to the entry of foreign missionaries. Various types of Christian buildings rose up in the province, were constructed by local builder, but designed and funded by foreign missionaries. In comparison to other Christian buildings, churches have unique historical value, cultural value and also special meaning in architecture art. However, their cultural heritage value has not yet been sufficiently considered. They are facing the prospect of being damaged and demolished, even in nowadays. It is incumbent that their architecture to be historically evaluated and that ways to be found to preserve them. In this paper, the author will focus on the neoteric Christian churches and illustrate the architecture by taking examples from the churches in Shaanxi, along with the intention to clarify the relationship between social background and the history of evolution of these churches. In addition, the authors have taken the chance to understand more comprehensively about the fascinating history of these Christian churches by way of field surveys and taping into archival documents.展开更多
The use of the trajectory of the Gini coefficient of total income formed by the increase in transfer income combined with the minimum Gini coefficient curve enables us to provide a comprehensive examination of the eff...The use of the trajectory of the Gini coefficient of total income formed by the increase in transfer income combined with the minimum Gini coefficient curve enables us to provide a comprehensive examination of the effect of government income redistribution policies,measure the efficiency of transfer income for income redistribution,and redress the methodological defects of research using the MT index and Gini coefficient decomposition.The findings of our new method of estimation show that China’s social security expenditure can reduce the income gap,but its efficiency in terms of redistribution is relatively low and has already passed the turning point of the Gini coefficient trajectory,resulting in some people being“over-allocated.”Readjusting the distribution of governmental transfers can help lower the Gini coefficient of residents’total income.展开更多
文摘The expansibility of PKI is expected to have the features that when the amount of user exceeds the system capacity, the users’ requirement can still be met by simply expanding the number of PKI entities and management levels, and this expansion should be achieved smoothly from the original system. The upward, downward, and horizontal expansions of PKI are discussed in this paper. A path discovery method is suggested to reduce the effect of PKI expansion to the end entities, so as to enhance the availbility of PKI services.
文摘For the suppliers of concerned services, theories about infrastructure pricing： SAT （Stand Alone economists such as Laffont, Tirole, etc. developed Test）, ECPR （Efficient Component Pricing Rule）. Especially, Sidak, Spulber, put forward M-ECPR （Market Efficient Component Pricing Rule） method for bottleneck infrastructures. In this article, we bring the M-ECPR principles into the study of Chinese railways pricing of its network infrastructures. Combined with our Engineer Model and Opportunity Cost Model, we analyzed the special conditions faced by Chinese railways, and developed a model for sharing infrastructure fees among freight and passenger transportations. Engineer Model split Variable Cost （VC） and Fixed Cost （FC） into freight and passenger activities, and Opportunity Cost Model take the insufficient supply of infrastructure capacity into consideration. Of course, the subsidy from the government greatly affected the price standard for bottleneck facilities, or so-called network infrastructures.
基金supported by a grant from the Major State Basic Research Development Program of China(973Program)(Grant No.2013CB733202)the team research fund of the State Key Laboratory of Geohazards Prevention and Geoenvironment Protection(Grant No.SKLGP)
文摘The Cheng-Lan railway links Chengdu, a central city in Southwestern China, and Lanzhou, a central city in Northwestern China. The railway passes through the Longmenshan fault zone (Wenchuan earthquake happened there on May 12, 2008), Minjiang fault zone, and Dongkunlun fault zone, which are all active. It runs over the Yangtze River and the Yellow River, and crosses high mountains and deep valleys. There exists, along the railway's alignment, different kinds of strata of hard granite and soft, weak metamorphic rocks such as carbonaceous slate, schist, and phyllite. It is, therefore, a key issue for such an infrastructure construction to assess the engineering geological conditions and risks, so as to mitigate or avoid possible georisks and to offer optional designs. Geological survey and georisk assessment along the railway corridor are carried out. Special attention is given to active faults, earthquakes and seismic zones. Based on these, discussions about geological aspects for route selection of the railway are conducted and countermeasures for georisk control are proposed accordingly. Main conclusions are achieved as follows: (1) Geohazards such as landslides, rockfalls and debries flows dominate both the route selection of the railway and the engineering structures (e.g., tunnels or bridges) adopted; (2) Tunnel has been proved to be an excellent structure for linear engineering in geologically active area; and (3) In the case where avoiding is impractical, necessary protection measures should be taken to engineering slopes in high earthquake intensity areas, especially the area with earthquake of Ms. 8 or greater.
文摘Christian buildings in Shaanxi already have more than 1,300 years development history since the first church was built in Chang＇an in 635 AD. The Rapid development of Christian buildings started from 1840 due to the entry of foreign missionaries. Various types of Christian buildings rose up in the province, were constructed by local builder, but designed and funded by foreign missionaries. In comparison to other Christian buildings, churches have unique historical value, cultural value and also special meaning in architecture art. However, their cultural heritage value has not yet been sufficiently considered. They are facing the prospect of being damaged and demolished, even in nowadays. It is incumbent that their architecture to be historically evaluated and that ways to be found to preserve them. In this paper, the author will focus on the neoteric Christian churches and illustrate the architecture by taking examples from the churches in Shaanxi, along with the intention to clarify the relationship between social background and the history of evolution of these churches. In addition, the authors have taken the chance to understand more comprehensively about the fascinating history of these Christian churches by way of field surveys and taping into archival documents.
文摘The use of the trajectory of the Gini coefficient of total income formed by the increase in transfer income combined with the minimum Gini coefficient curve enables us to provide a comprehensive examination of the effect of government income redistribution policies,measure the efficiency of transfer income for income redistribution,and redress the methodological defects of research using the MT index and Gini coefficient decomposition.The findings of our new method of estimation show that China’s social security expenditure can reduce the income gap,but its efficiency in terms of redistribution is relatively low and has already passed the turning point of the Gini coefficient trajectory,resulting in some people being“over-allocated.”Readjusting the distribution of governmental transfers can help lower the Gini coefficient of residents’total income.
