In this paper, a transfer matrix and a three-dimensional dynamic response of a layered half-space to an arbitrary buried source are derived with the aid of a technique which combines the Laplace and two-dimensional Fo...In this paper, a transfer matrix and a three-dimensional dynamic response of a layered half-space to an arbitrary buried source are derived with the aid of a technique which combines the Laplace and two-dimensional Fourier transforms in a rectangular coordinate system. This method is clear in concept, and the corresponding formulas given in the paper are simple and convenient for marine seismic prospecting and other fields' applications. An example is presented and the calculated results are in good agreement with those of the finite element method (FEM).展开更多
Reinforced concrete structure can ensure the stability and safety of buildings, so it has been widely used in contemporary civil construction. However, judging from the current situation, there are still many problems...Reinforced concrete structure can ensure the stability and safety of buildings, so it has been widely used in contemporary civil construction. However, judging from the current situation, there are still many problems in the construction of concrete structures, the root of which lies in the fact that the constructors have not adopted practical construction techniques or improper use of techniques. Therefore, the article analyzes the current construction situation of concrete structures in our country and puts forward corresponding countermeasures in order to achieve the goal of improving the construction quality in our country.展开更多
Objective: to explore the clinical value of involving diabetes patients with hypertension in self-management activities. Methods: a total of 100 cases of hypertension combined with diabetes, the earliest treatment tim...Objective: to explore the clinical value of involving diabetes patients with hypertension in self-management activities. Methods: a total of 100 cases of hypertension combined with diabetes, the earliest treatment time: December 2018, the latest admission time: December 2019, it was divided into control group (n=50, routine management), observation group (n=50, self-management). Results: after evaluating the quality of life and self-management ability, the quality of life and self-management ability of the observation group were higher compared with the control group, and the blood sugar and blood pressure levels were lower than the control group (P <0.05). Conclusion: for cases of hypertension and diabetes mellitus, participating in self-management activities is relatively effective in improving patient quality of life, improving self-management ability, and reducing blood sugar and blood pressure level.展开更多
Highly ordered SnO2/Fe2O3 composite nano- wire arrays have been synthesized by electrophoretic deposi- tion method. The morphology and chemical composition of SnO2/Fe2O3 composite nanowire arrays are characterized by ...Highly ordered SnO2/Fe2O3 composite nano- wire arrays have been synthesized by electrophoretic deposi- tion method. The morphology and chemical composition of SnO2/Fe2O3 composite nanowire arrays are characterized by SEM, TEM, EDX, XPS, and XRD. The results show that the SnO2/Fe2O3 composite nanowires are about 180 nm in width and tens of microns in length, and they are composed of small nanoparticles of tetragonal SnO2 and rhombohedral ɑ-Fe2O3 with diameters of 10-15 nm. The SnO2/Fe2O3 com- posite nanowires are formed by a series of chemical reac- tions.展开更多
基金funded by the Natural Science Foundation Projeet of State(40174030)the Natural Science Foundation Project of Shandong Province(Y2000E05)
文摘In this paper, a transfer matrix and a three-dimensional dynamic response of a layered half-space to an arbitrary buried source are derived with the aid of a technique which combines the Laplace and two-dimensional Fourier transforms in a rectangular coordinate system. This method is clear in concept, and the corresponding formulas given in the paper are simple and convenient for marine seismic prospecting and other fields' applications. An example is presented and the calculated results are in good agreement with those of the finite element method (FEM).
文摘Reinforced concrete structure can ensure the stability and safety of buildings, so it has been widely used in contemporary civil construction. However, judging from the current situation, there are still many problems in the construction of concrete structures, the root of which lies in the fact that the constructors have not adopted practical construction techniques or improper use of techniques. Therefore, the article analyzes the current construction situation of concrete structures in our country and puts forward corresponding countermeasures in order to achieve the goal of improving the construction quality in our country.
文摘Objective: to explore the clinical value of involving diabetes patients with hypertension in self-management activities. Methods: a total of 100 cases of hypertension combined with diabetes, the earliest treatment time: December 2018, the latest admission time: December 2019, it was divided into control group (n=50, routine management), observation group (n=50, self-management). Results: after evaluating the quality of life and self-management ability, the quality of life and self-management ability of the observation group were higher compared with the control group, and the blood sugar and blood pressure levels were lower than the control group (P <0.05). Conclusion: for cases of hypertension and diabetes mellitus, participating in self-management activities is relatively effective in improving patient quality of life, improving self-management ability, and reducing blood sugar and blood pressure level.
基金This work was supported by the Prophase Project of“973”Plan(Grant No.2002CCC02700)the National Natural Science Foundation of China(Grants No.20371015 and 90306010).
文摘Highly ordered SnO2/Fe2O3 composite nano- wire arrays have been synthesized by electrophoretic deposi- tion method. The morphology and chemical composition of SnO2/Fe2O3 composite nanowire arrays are characterized by SEM, TEM, EDX, XPS, and XRD. The results show that the SnO2/Fe2O3 composite nanowires are about 180 nm in width and tens of microns in length, and they are composed of small nanoparticles of tetragonal SnO2 and rhombohedral ɑ-Fe2O3 with diameters of 10-15 nm. The SnO2/Fe2O3 com- posite nanowires are formed by a series of chemical reac- tions.
