In the paper,the authors collect,discuss,and find out several connections,equivalences,closed-form formulas,and combinatorial identities concerning partial Bell polynomials,falling factorials,rising factorials,extende...In the paper,the authors collect,discuss,and find out several connections,equivalences,closed-form formulas,and combinatorial identities concerning partial Bell polynomials,falling factorials,rising factorials,extended binomial coefficients,and the Stirling numbers of the first and second kinds.These results are new,interesting,important,useful,and applicable in combinatorial number theory.展开更多
From the Industrial Revolution to the World War,the past three centuries have witnessed the development and rise and fall of Great Britain.Great Britain,an island country with a total area of about 240,000 square kilo...From the Industrial Revolution to the World War,the past three centuries have witnessed the development and rise and fall of Great Britain.Great Britain,an island country with a total area of about 240,000 square kilometers,enjoys a very important place in the world in modern history.Great Britain was the first industrial country and created the epoch-making laissez-faire capitalism and built a sun-never-set empire.It was also the leadership of the world from the middle of 18^th and to the middle of 19^th century.In retrospect to the rise of Great Britain,we can easily see that it was by relying on an innovative culture that the island country became a great power in Europe and then became the dominant empire in the world.This innovative character permeates in all kinds of culture including industrial,military,technological,politic and diplomatic.As for the main cause of Great Britain’s rise,this thesis attempts to analyze from three aspects,that is,the emancipation of mind,the advancement of military power,and the development of technology.After the World War,Great Britain began to suffer a decline in status and was reduced to a second class developed country.That is also because the conservative factor in its culture which blocks its development and the potential to innovate new things.The past years has witnessed the fall of the empire and also left us much inspiration.Take the history as a mirror,the thesis will focus on the“English disease”and influence of the World War to make an analysis on Great Britain’s fall.A conclusion of inspiration would also be included.展开更多
The novel The Rise and Fall of Wing Shing Street delves into the reality of Hong Kong residents deeply attuned to spatial awareness but detached from temporal significance,entangling emotions surrounding time and spac...The novel The Rise and Fall of Wing Shing Street delves into the reality of Hong Kong residents deeply attuned to spatial awareness but detached from temporal significance,entangling emotions surrounding time and space.Through narrative interruption and extension,the author portrays the genuine struggles of Hong Kong inhabitants-juxtaposing the blurred boundaries of time and space and the inherent rootlessness of reality within a fictionalized framework.Emphasizing the 20th-century human condition,wherein spatial awareness overshadows temporal understanding,the novel underscores the consequences:a loss of history and cultural identity.With a fresh perspective,the narrative explores the interplay of time and space,accentuating both the fictitious and authentic dimensions.This prompts readers to reconsider their history,culture,and the current moment,ultimately highlighting the pivotal role of temporal awareness.展开更多
This paper examines various aspects of the design process and subsequent field test measurements of a large and complex substation grounding system. The study and measurements show that soil layering and lead interfer...This paper examines various aspects of the design process and subsequent field test measurements of a large and complex substation grounding system. The study and measurements show that soil layering and lead interference can have a significant impact on the appropriate test location that yields the exact substation ground impedance. Applying a specific percentage rule such as the 61.8% rule for uniform soils to obtain the true ground impedance may lead to unacceptable errors for large grounding systems. This poses significant problems when attempting to validate a design based on raw test data that are interpreted using approximate methods to evaluate substation ground impedance, and determine ground potential rise (GPR), touch and step voltages. Advanced measurement methodologies and modern software packages were used to obtain and effectively analyze fall of potential test data, compute fault current distribution, and evaluate touch and step voltages for this large substation. Fault current distribution between the grounding system and other metallic paths were computed to determine the portion of fault current discharged in the grounding system. The performance of the grounding system, including its GPR and touch and step voltages, has been accurately computed and measured, taking into account the impedance of the steel material used of the ground conductors and circulating currents within the substation grounding system.展开更多
基金supported in part by the National Natural Science Foundation of China(Grant No.12061033)by the Research Program of Science and Technology at Universities of Inner Mongolia Autonomous Region(Grants No.NJZY20119)by the Natural Science Foundation of Inner Mongolia(Grant No.2019MS01007),China.
文摘In the paper,the authors collect,discuss,and find out several connections,equivalences,closed-form formulas,and combinatorial identities concerning partial Bell polynomials,falling factorials,rising factorials,extended binomial coefficients,and the Stirling numbers of the first and second kinds.These results are new,interesting,important,useful,and applicable in combinatorial number theory.
文摘From the Industrial Revolution to the World War,the past three centuries have witnessed the development and rise and fall of Great Britain.Great Britain,an island country with a total area of about 240,000 square kilometers,enjoys a very important place in the world in modern history.Great Britain was the first industrial country and created the epoch-making laissez-faire capitalism and built a sun-never-set empire.It was also the leadership of the world from the middle of 18^th and to the middle of 19^th century.In retrospect to the rise of Great Britain,we can easily see that it was by relying on an innovative culture that the island country became a great power in Europe and then became the dominant empire in the world.This innovative character permeates in all kinds of culture including industrial,military,technological,politic and diplomatic.As for the main cause of Great Britain’s rise,this thesis attempts to analyze from three aspects,that is,the emancipation of mind,the advancement of military power,and the development of technology.After the World War,Great Britain began to suffer a decline in status and was reduced to a second class developed country.That is also because the conservative factor in its culture which blocks its development and the potential to innovate new things.The past years has witnessed the fall of the empire and also left us much inspiration.Take the history as a mirror,the thesis will focus on the“English disease”and influence of the World War to make an analysis on Great Britain’s fall.A conclusion of inspiration would also be included.
文摘The novel The Rise and Fall of Wing Shing Street delves into the reality of Hong Kong residents deeply attuned to spatial awareness but detached from temporal significance,entangling emotions surrounding time and space.Through narrative interruption and extension,the author portrays the genuine struggles of Hong Kong inhabitants-juxtaposing the blurred boundaries of time and space and the inherent rootlessness of reality within a fictionalized framework.Emphasizing the 20th-century human condition,wherein spatial awareness overshadows temporal understanding,the novel underscores the consequences:a loss of history and cultural identity.With a fresh perspective,the narrative explores the interplay of time and space,accentuating both the fictitious and authentic dimensions.This prompts readers to reconsider their history,culture,and the current moment,ultimately highlighting the pivotal role of temporal awareness.
文摘This paper examines various aspects of the design process and subsequent field test measurements of a large and complex substation grounding system. The study and measurements show that soil layering and lead interference can have a significant impact on the appropriate test location that yields the exact substation ground impedance. Applying a specific percentage rule such as the 61.8% rule for uniform soils to obtain the true ground impedance may lead to unacceptable errors for large grounding systems. This poses significant problems when attempting to validate a design based on raw test data that are interpreted using approximate methods to evaluate substation ground impedance, and determine ground potential rise (GPR), touch and step voltages. Advanced measurement methodologies and modern software packages were used to obtain and effectively analyze fall of potential test data, compute fault current distribution, and evaluate touch and step voltages for this large substation. Fault current distribution between the grounding system and other metallic paths were computed to determine the portion of fault current discharged in the grounding system. The performance of the grounding system, including its GPR and touch and step voltages, has been accurately computed and measured, taking into account the impedance of the steel material used of the ground conductors and circulating currents within the substation grounding system.
