As an important means of human to change their living environment, building creates important wellbeing for people’s production and life, while as an important means of building construction, civil engineering plays ...As an important means of human to change their living environment, building creates important wellbeing for people’s production and life, while as an important means of building construction, civil engineering plays an absolutely important role in the architectural construction. The fruitful innovation in the construction of civil engineering undoubtedly has a very important meaning and value for the development of civil engineering discipline and for the realization of human wellbeing. This paper makes analysis on several means of technological innovation of civil engineering construction, purposed to promote the practical development of civil engineering through helpful discussion and exploration.展开更多
Groundwater resources have always been some of the most valuable resources of human settlements.Climate changes and ever-increasing water demands registered in the last century have led to diminishing levels of ground...Groundwater resources have always been some of the most valuable resources of human settlements.Climate changes and ever-increasing water demands registered in the last century have led to diminishing levels of groundwater reserves,as well as reduced recharging potential.Therefore,in order to use groundwater aquifers in a sustainable manner,it is required to identify areas with higher replenishing potential.The current study addresses the issue of generating a map for identifying differently ranked groundwater recharging potential values,in the aquifers of the Moldavian Plain region,Romania.For the purpose of conducting the analysis,maps were created through GIS based multi-criteria Analytic Hierarchy Process(AHP)and Catastrophe Theory(CT),with seven relevant,thematic,spatial layers:precipitation distribution,lithological strata,soil texture,declivity,drainage density,land use and the distribution of groundwater level tendencies.The results of the two methods of analysis are similar.Prediction differences are of maximum 3%,in the case of extreme classes(very bad and very good)and in the case of middle classes the deviation is not greater than 0.4%.Following the validation of the results generated by the two methods that were applied,it was observed that the predictions offered by CT are more accurate.This aspect can be based on the fact that the main factors that contribute to the prediction are different.This type of workflow emphasizes the necessity of implementing appropriate groundwater management plans for mitigating reservoir scarcity/depletion,and recommending sustainable solutions for future groundwater exploitation practices.展开更多
CFB boilers have been widely used in China in recent years with their perfect performances in coal adaptability, load variation capability and lower pollutant emission. The No.3 135-MW CFB unit in Lianzhou Power Plant...CFB boilers have been widely used in China in recent years with their perfect performances in coal adaptability, load variation capability and lower pollutant emission. The No.3 135-MW CFB unit in Lianzhou Power Plant is the f irst 440-t/h series CFB unit in Guangdong Province. It f inished 72-hour trial operation in Feb. 2004 and was transferred to trial operation. During the trial operation and the next commercial operation, there were some problems happened in the boiler slag discharging system, seriously affecting the safe and reliable operation and the loading capability. After innovation, these problems have been completely solved. Hopefully the solutions may be used for reference to the units with similar problems.展开更多
Modern education thought that students are the main body of education, all educational activities are for students. The educational concept of "people-oriented" has been widely applied to the ideological and...Modern education thought that students are the main body of education, all educational activities are for students. The educational concept of "people-oriented" has been widely applied to the ideological and political teaching in senior high schools, and has been attached importance to by teachers. In order to realize the high quality of students' learning, it is of great significance to carry out the educational activities with students as the subject of education in high school ideological and political teaching. This paper expounds how to successfully integrate the educational concept of "people-oriented" into the ideological and political teaching reform of senior high school from multiple angles, and focuses on the educational reform mode of expanding the teaching content, establishing an interactive ideological and political education classroom and connecting the life-oriented teaching content, so as to provide reference and reference for the majority of senior high school ideological and political teachers.展开更多
The problem of H∞ filtering for continuous-time systems with pointwise time-varying delay is investigated in this paper. By applying an innovation analysis in Krein space, a necessary and sufficient condition for the...The problem of H∞ filtering for continuous-time systems with pointwise time-varying delay is investigated in this paper. By applying an innovation analysis in Krein space, a necessary and sufficient condition for the existence of an H∞ filter is derived in two methods： One is the partial differential equation approach, the other is the reorganized innovation analysis approach. The former gives a solution to the proposed H∞ filtering problem in terms of the solution of a partial differential equation with boundary conditions. The later gives an analytical solution to the proposed H∞ filtering problem in terms of the solutions of Riccati and matrix differential equations.展开更多
This paper is to study the linear minimum variance estimation for discretetime systems. A simple approach to the problem is presented by developing re-organized innovation analysis for the systems with instantaneous a...This paper is to study the linear minimum variance estimation for discretetime systems. A simple approach to the problem is presented by developing re-organized innovation analysis for the systems with instantaneous and double time-delayed measurements. It is shown that the derived estimator involves solving three different standard Kalman filtering with the same dimension as the original system. The obtained results form the basis for solving some complicated problems such as H, fixed-lag smoothing, preview control, H, filtering and control with time delays.展开更多
文摘As an important means of human to change their living environment, building creates important wellbeing for people’s production and life, while as an important means of building construction, civil engineering plays an absolutely important role in the architectural construction. The fruitful innovation in the construction of civil engineering undoubtedly has a very important meaning and value for the development of civil engineering discipline and for the realization of human wellbeing. This paper makes analysis on several means of technological innovation of civil engineering construction, purposed to promote the practical development of civil engineering through helpful discussion and exploration.
基金Romanian Ministry of Education and Research CNCS-UEFISCDI,No.PN-III-P1-1.1-TE-2019-0286,POSCCE-O 2.2.1,SMIS-CSNR 13984-901,No.257/28.09.2010 Project,CERNESIM。
文摘Groundwater resources have always been some of the most valuable resources of human settlements.Climate changes and ever-increasing water demands registered in the last century have led to diminishing levels of groundwater reserves,as well as reduced recharging potential.Therefore,in order to use groundwater aquifers in a sustainable manner,it is required to identify areas with higher replenishing potential.The current study addresses the issue of generating a map for identifying differently ranked groundwater recharging potential values,in the aquifers of the Moldavian Plain region,Romania.For the purpose of conducting the analysis,maps were created through GIS based multi-criteria Analytic Hierarchy Process(AHP)and Catastrophe Theory(CT),with seven relevant,thematic,spatial layers:precipitation distribution,lithological strata,soil texture,declivity,drainage density,land use and the distribution of groundwater level tendencies.The results of the two methods of analysis are similar.Prediction differences are of maximum 3%,in the case of extreme classes(very bad and very good)and in the case of middle classes the deviation is not greater than 0.4%.Following the validation of the results generated by the two methods that were applied,it was observed that the predictions offered by CT are more accurate.This aspect can be based on the fact that the main factors that contribute to the prediction are different.This type of workflow emphasizes the necessity of implementing appropriate groundwater management plans for mitigating reservoir scarcity/depletion,and recommending sustainable solutions for future groundwater exploitation practices.
文摘CFB boilers have been widely used in China in recent years with their perfect performances in coal adaptability, load variation capability and lower pollutant emission. The No.3 135-MW CFB unit in Lianzhou Power Plant is the f irst 440-t/h series CFB unit in Guangdong Province. It f inished 72-hour trial operation in Feb. 2004 and was transferred to trial operation. During the trial operation and the next commercial operation, there were some problems happened in the boiler slag discharging system, seriously affecting the safe and reliable operation and the loading capability. After innovation, these problems have been completely solved. Hopefully the solutions may be used for reference to the units with similar problems.
文摘Modern education thought that students are the main body of education, all educational activities are for students. The educational concept of "people-oriented" has been widely applied to the ideological and political teaching in senior high schools, and has been attached importance to by teachers. In order to realize the high quality of students' learning, it is of great significance to carry out the educational activities with students as the subject of education in high school ideological and political teaching. This paper expounds how to successfully integrate the educational concept of "people-oriented" into the ideological and political teaching reform of senior high school from multiple angles, and focuses on the educational reform mode of expanding the teaching content, establishing an interactive ideological and political education classroom and connecting the life-oriented teaching content, so as to provide reference and reference for the majority of senior high school ideological and political teachers.
基金supported by the National Natural Science Foundation for Distinguished Young Scholars of China under Grant No.60825304the National Basic Research Development Program of China under Grant No.973 Program,No.2009cb320600the National Natural Science Foundation of China under Grant No. 61104050
文摘The problem of H∞ filtering for continuous-time systems with pointwise time-varying delay is investigated in this paper. By applying an innovation analysis in Krein space, a necessary and sufficient condition for the existence of an H∞ filter is derived in two methods： One is the partial differential equation approach, the other is the reorganized innovation analysis approach. The former gives a solution to the proposed H∞ filtering problem in terms of the solution of a partial differential equation with boundary conditions. The later gives an analytical solution to the proposed H∞ filtering problem in terms of the solutions of Riccati and matrix differential equations.
基金the National Natural Science Foundation of China （Grant Nos. 60574016, 60474058, 60534010）.
文摘This paper is to study the linear minimum variance estimation for discretetime systems. A simple approach to the problem is presented by developing re-organized innovation analysis for the systems with instantaneous and double time-delayed measurements. It is shown that the derived estimator involves solving three different standard Kalman filtering with the same dimension as the original system. The obtained results form the basis for solving some complicated problems such as H, fixed-lag smoothing, preview control, H, filtering and control with time delays.
