According to the ＂jacking-up＂ theory, which relates the cause of earthquakes to outer core convection ascension bodies, the crust will gradually recover after an earthquake. In such cases, the crust is stretched, th...According to the ＂jacking-up＂ theory, which relates the cause of earthquakes to outer core convection ascension bodies, the crust will gradually recover after an earthquake. In such cases, the crust is stretched, the underground temperature is reduced, precipitation decreases, and drought occurs. In this paper, precipitation is compared with ground temperature and seismic data to determine the spatial and temporal relationship between earthquakes and subsequent droughts. Our objective is to develop a new method of drought prediction. With a few exceptions in location, the analysis of the first drought to occur after the Ms 〉 7 earthquakes in China's Mainland and the adjacent areas since 1950 shows that droughts tended to occur in regions near earthquake epicenters and in the eastern regions of the epicenters at the same latitude within six months after the earthquakes. In addition, and the differences between the starting time of the earthquakes and the droughts nearly share the same probability of 0 to 6 months. After careful analysis of 34 Ms 〉 6.5 earthquakes occurring in western China from 1980 to 2011, we determined that a second drought tends to occur approximately six months following the first drought, indicating a quasi-half-year period. Moreover, the duration of the quasi-half-year fluctuation increases with the magnitude of earthquake, at approximately 2.5 years for Ms 6.5 earthquake and approximately 5 years for Ms 8 earthquake.展开更多
A Fault detection and isolation(FDI)scheme for discrete time-delay system is proposed in this paper,which can not only detect but also isolate the faults.A time delay operator is introduced to resolve the problem bro...A Fault detection and isolation(FDI)scheme for discrete time-delay system is proposed in this paper,which can not only detect but also isolate the faults.A time delay operator is introduced to resolve the problem brought by the time-delay system.The design and computation for the FDI system is carried by computer math tool Maple,which can easily deal with the symbolic computation.Residuals in the form of parity space can be deduced from the recursion of the system equations.Further more,a generalized residual set is created using the freedom of the parity space redundancy.Thus,both fault detection and fault isolation have been accomplished.The proposed method has been verified by a numerical example.展开更多
In his 1945 study of Djuna Barne＇s Nightwood, Joseph Frank analyzes a crucial technique of modernist literature, the substitution of spatial relationships for temporal progression as a formal metaphor of thematic dev...In his 1945 study of Djuna Barne＇s Nightwood, Joseph Frank analyzes a crucial technique of modernist literature, the substitution of spatial relationships for temporal progression as a formal metaphor of thematic development. Starting with Gustave Flaubert and recognizing his efforts to duplicate the simultaneity of action possible in drama and later in film, Frank comments that since language proceeds in time, it is possible to approach this simultaneity of perception only by breaking up temporal sequence. While Flaubert introduces this method, it does not become a dominant form until James Joyce＇s Ulysses. According to Frank, spatialization of form in this novel provides an alternative to the chronological development normal to verbal structures, which can be read only in a linear fashion through time, unlike painting and the plastic arts, which can be visually apprehended instantaneously. Applied to Ulysses as a whole by Joseph Frank, the conception of spatial form might as well serve as a convenient point of departure for the analysis on much smaller, let＇s say, ＂episodic＂ scale. In ＂Nausicaa＂ episode, Joyce dissolves temporal sequence by cutting back and forth between the various levels of action in a slowly-rising crescendo to achieve the unified impact, the sense of simultaneous activity occurring in different places. For the duration of the episode the time-flow of the narrative is halted： various levels of action are juxtaposed independently of the progress of the narrative. Joyce, in this fragmentation of narrative structure, proceeded on the assumption that a unified spatial apprehension of not only separate episodes but his entire work would ultimately be possible.展开更多
Functional limit theorems for scaled occupation time fluctuations of a sequence of generalized branching particle systems in Rd with anisotropic space motions and strongly degenerated splitting abilities are studied i...Functional limit theorems for scaled occupation time fluctuations of a sequence of generalized branching particle systems in Rd with anisotropic space motions and strongly degenerated splitting abilities are studied in the cases of critical and intermediate dimensions. The results show that the limit processes are time-independent measure-valued Wiener processes with simple spatial structure.展开更多
基金supported by the National 973 Program(Grant No.2008CB425704)the National Natural Science Foundation of China(Grant No.40975049)
文摘According to the ＂jacking-up＂ theory, which relates the cause of earthquakes to outer core convection ascension bodies, the crust will gradually recover after an earthquake. In such cases, the crust is stretched, the underground temperature is reduced, precipitation decreases, and drought occurs. In this paper, precipitation is compared with ground temperature and seismic data to determine the spatial and temporal relationship between earthquakes and subsequent droughts. Our objective is to develop a new method of drought prediction. With a few exceptions in location, the analysis of the first drought to occur after the Ms 〉 7 earthquakes in China's Mainland and the adjacent areas since 1950 shows that droughts tended to occur in regions near earthquake epicenters and in the eastern regions of the epicenters at the same latitude within six months after the earthquakes. In addition, and the differences between the starting time of the earthquakes and the droughts nearly share the same probability of 0 to 6 months. After careful analysis of 34 Ms 〉 6.5 earthquakes occurring in western China from 1980 to 2011, we determined that a second drought tends to occur approximately six months following the first drought, indicating a quasi-half-year period. Moreover, the duration of the quasi-half-year fluctuation increases with the magnitude of earthquake, at approximately 2.5 years for Ms 6.5 earthquake and approximately 5 years for Ms 8 earthquake.
基金National Natural Science Foundation of China(No.60574081)
文摘A Fault detection and isolation(FDI)scheme for discrete time-delay system is proposed in this paper,which can not only detect but also isolate the faults.A time delay operator is introduced to resolve the problem brought by the time-delay system.The design and computation for the FDI system is carried by computer math tool Maple,which can easily deal with the symbolic computation.Residuals in the form of parity space can be deduced from the recursion of the system equations.Further more,a generalized residual set is created using the freedom of the parity space redundancy.Thus,both fault detection and fault isolation have been accomplished.The proposed method has been verified by a numerical example.
文摘In his 1945 study of Djuna Barne＇s Nightwood, Joseph Frank analyzes a crucial technique of modernist literature, the substitution of spatial relationships for temporal progression as a formal metaphor of thematic development. Starting with Gustave Flaubert and recognizing his efforts to duplicate the simultaneity of action possible in drama and later in film, Frank comments that since language proceeds in time, it is possible to approach this simultaneity of perception only by breaking up temporal sequence. While Flaubert introduces this method, it does not become a dominant form until James Joyce＇s Ulysses. According to Frank, spatialization of form in this novel provides an alternative to the chronological development normal to verbal structures, which can be read only in a linear fashion through time, unlike painting and the plastic arts, which can be visually apprehended instantaneously. Applied to Ulysses as a whole by Joseph Frank, the conception of spatial form might as well serve as a convenient point of departure for the analysis on much smaller, let＇s say, ＂episodic＂ scale. In ＂Nausicaa＂ episode, Joyce dissolves temporal sequence by cutting back and forth between the various levels of action in a slowly-rising crescendo to achieve the unified impact, the sense of simultaneous activity occurring in different places. For the duration of the episode the time-flow of the narrative is halted： various levels of action are juxtaposed independently of the progress of the narrative. Joyce, in this fragmentation of narrative structure, proceeded on the assumption that a unified spatial apprehension of not only separate episodes but his entire work would ultimately be possible.
基金supported by National Natural Science Foundation of China (Grant No. 10901054)
文摘Functional limit theorems for scaled occupation time fluctuations of a sequence of generalized branching particle systems in Rd with anisotropic space motions and strongly degenerated splitting abilities are studied in the cases of critical and intermediate dimensions. The results show that the limit processes are time-independent measure-valued Wiener processes with simple spatial structure.
