The intent of this paper is to conceptualize physical literacy in the school environment within the United States educational system. Evolution of physical literacy from both a general education and disciplinary focus...The intent of this paper is to conceptualize physical literacy in the school environment within the United States educational system. Evolution of physical literacy from both a general education and disciplinary focus is overviewed. The challenges of transitioning from a physically educated to a physically literate person as the primary learning outcome of physical education may inhibit progress. Five prioritized recom- mendations are made to assist teachers in overcoming such barriers： （a） whole of school approach, （b） effective, differentiated pedagogy, （c） integration of technology for individualized tracking of progress, （d） supportive school climate, and （e） alignment of local efforts with national initiatives.展开更多
The modern TSs （total stations） have reached a very high level in the provided reading and reliability （accuracy and precision） of their measurements. The evolution of the digital technology has helped in this dir...The modern TSs （total stations） have reached a very high level in the provided reading and reliability （accuracy and precision） of their measurements. The evolution of the digital technology has helped in this direction. Thus, the TSs can support all requirements for the stake out and monitoring of modern survey engineering and constructions projects. Their complicated manufacturing process and the sensitivity of their components require gauging, adjusting and calibration at certain time intervals. This appears to be the only way in order to assure the precision of measurements provided by the manufacturer and the reliability of the works they are used for. The goal of this paper is to propose a method for the estimation of the gauging time interval for modern YSs. which could be used by any user. More specifically, the indispensable need for the TSs gauging is elevated and documented. All the parameters that influence their operation are registered. A model expressed by a scale of grades is defined, leading thus to an equation for the calculation of the time interval for the next needed gauging and calibration.展开更多
At present, all aspects of China have entered the era of a rapid development, while the development speed of digital electronic technology is especially outstanding. This is a new way for China＇ s new personnel train...At present, all aspects of China have entered the era of a rapid development, while the development speed of digital electronic technology is especially outstanding. This is a new way for China＇ s new personnel training, and also proposes higher requirements on this type of personnel training institutions. In view of the demands of society and different majors on personnel, an enhancement to the standardized management of electronic laboratory operations becomes one of the important tasks for personnel training institutions. In this paper, how to practice the standardization management in an all-round way is discussed centered at college and university students＇ electronic laboratory.展开更多
A 10-bit single-slope analog-to-digital converter (ADC) for time-delay-integration CMOS image sensor was proposed. A programmable ramp generator was applied to accomplish the error calibration and improve the linearit...A 10-bit single-slope analog-to-digital converter (ADC) for time-delay-integration CMOS image sensor was proposed. A programmable ramp generator was applied to accomplish the error calibration and improve the linearity. The ADC was fabricated in a 180 nm 1P4M CMOS process. Experimental results indicate that the differential nonlinearity and integral nonlinearity were 0.51/-0.53 LSB and 0.63/-0.71 LSB, respectively. The sampling rate of the ADC was 32 kHz.展开更多
An error correction technique to achieve a 14-bit successive approximation register analog-to-digital converter(SAR ADC) is proposed. A tunable split capacitor is designed to eliminate the mismatches caused by parasit...An error correction technique to achieve a 14-bit successive approximation register analog-to-digital converter(SAR ADC) is proposed. A tunable split capacitor is designed to eliminate the mismatches caused by parasitic capacitors. The linearity error of capacitor array caused by process mismatch is calibrated by a novel calibration capacitor array that can improve the sampling rate. The dual-comparator topology ensures both the speed and precision of the ADC. The simulation results show that the SAR ADC after calibration achieves 83.07 dB SNDR and 13.5 bit ENOB at 500 kilosamples/s.展开更多
The arrival of the information age, especially development and popularization of digital and network, which fundamentally changes the development process of the library, the library＇ s status as Literature Resource C...The arrival of the information age, especially development and popularization of digital and network, which fundamentally changes the development process of the library, the library＇ s status as Literature Resource Center has been hit. As the core work of the Library Document Resources Construction in concepts, content structure and evaluation etc. also undergone profound changes, a series of new problems have taken out, which we need to think and solve. In this passage, we discussed from the problem facing of Document Resources Construction work in the digital environment and how to deal with these challenges.展开更多
At present, the reform of colleges and universities in our country is in full swing. In the course of teaching design of art in colleges and universities, it is necessary to change the teaching mode in time to adapt t...At present, the reform of colleges and universities in our country is in full swing. In the course of teaching design of art in colleges and universities, it is necessary to change the teaching mode in time to adapt to the new teaching development environment. In the era of digital development, we need to give full attention to the optimization of art design teaching in colleges and universities, and run new teaching techniques. This paper mainly analyzes the advantages and importance of the digital art design in colleges and universities, and then discusses the application of digital technology in the art design teaching and the concrete teaching optimiTatiun strategy in detail. Hoping to through this theoretical research, contribute to the improvement of the quality of art design teaching.展开更多
To calculate the deviations between single station magnitudes and average ones by the magnitude residual statistical method,the paper selects 13086 seismic events recorded by the Gansu broadband digital seismic networ...To calculate the deviations between single station magnitudes and average ones by the magnitude residual statistical method,the paper selects 13086 seismic events recorded by the Gansu broadband digital seismic network from January 2009 to December 2012. The frequency distribution and quantitative statistics of the deviations of earthquake magnitude are analyzed. The MLcalibration function is modified and a uniform local magnitude system characteristic of the Gansu region,is obtained.展开更多
The globalization development of science and technology makes academic English education in Chinese universities become a trend, and the establishment and application of digital teaching environment also provides an e...The globalization development of science and technology makes academic English education in Chinese universities become a trend, and the establishment and application of digital teaching environment also provides an efficient technical support for the teaching and practice of Academic English. Through its own characteristics and Academic English teaching requirements analysis, understand the function and role of digital environment in academic English teaching and trying to propose effective strategies for Academic English Teaching Practice Exploration.展开更多
This work explores the feasibility of a novel predictive control strategy on a power factor correction system. The proposed control strategy allows a significant reduction of the power losses respect to a classical pr...This work explores the feasibility of a novel predictive control strategy on a power factor correction system. The proposed control strategy allows a significant reduction of the power losses respect to a classical predictive control strategy working with a fixed execution time Ts. The proposed control strategy operates with a variable execution time T~, and it has been implemented using a low cost hardware platform based on TI~ TMS320F2812 DSP. The chosen platform is capable to execute a control strategy code with a variable execution time T,. This operation can be performed by setting in proper manner, the timer registers of one of two event manager A/B blocks present on the mentioned DSP （digital signal processor）.展开更多
The prediction of laminar-turbulent transition in boundary layer is very important for obtaining accurate aerodynamic characteristics with computational fluid dynamic(CFD)tools,because laminar-turbulent transition is ...The prediction of laminar-turbulent transition in boundary layer is very important for obtaining accurate aerodynamic characteristics with computational fluid dynamic(CFD)tools,because laminar-turbulent transition is directly related to complex flow phenomena in boundary layer and separated flow in space.Unfortunately,the transition effect isn’t included in today’s major CFD tools because of non-local calculations in transition modeling.In this paper,Menter’sγ-Re_θtransition model is calibrated and incorporated into a Reynolds-Averaged Navier-Stokes(RANS)code-Trisonic Platform(TRIP)developed in China Aerodynamic Research and Development Center(CARDC).Based on the experimental data of flat plate from the literature,the empirical correlations involved in the transition model are modified and calibrated numerically.Numerical simulation for low-speed flow of Trapezoidal Wing(Trap Wing)is performed and compared with the corresponding experimental data.It is indicated that theγ-Re_θtransition model can accurately predict the location of separation-induced transition and natural transition in the flow region with moderate pressure gradient.The transition model effectively imporves the simulation accuracy of the boundary layer and aerodynamic characteristics.展开更多
文摘The intent of this paper is to conceptualize physical literacy in the school environment within the United States educational system. Evolution of physical literacy from both a general education and disciplinary focus is overviewed. The challenges of transitioning from a physically educated to a physically literate person as the primary learning outcome of physical education may inhibit progress. Five prioritized recom- mendations are made to assist teachers in overcoming such barriers： （a） whole of school approach, （b） effective, differentiated pedagogy, （c） integration of technology for individualized tracking of progress, （d） supportive school climate, and （e） alignment of local efforts with national initiatives.
文摘The modern TSs （total stations） have reached a very high level in the provided reading and reliability （accuracy and precision） of their measurements. The evolution of the digital technology has helped in this direction. Thus, the TSs can support all requirements for the stake out and monitoring of modern survey engineering and constructions projects. Their complicated manufacturing process and the sensitivity of their components require gauging, adjusting and calibration at certain time intervals. This appears to be the only way in order to assure the precision of measurements provided by the manufacturer and the reliability of the works they are used for. The goal of this paper is to propose a method for the estimation of the gauging time interval for modern YSs. which could be used by any user. More specifically, the indispensable need for the TSs gauging is elevated and documented. All the parameters that influence their operation are registered. A model expressed by a scale of grades is defined, leading thus to an equation for the calculation of the time interval for the next needed gauging and calibration.
文摘At present, all aspects of China have entered the era of a rapid development, while the development speed of digital electronic technology is especially outstanding. This is a new way for China＇ s new personnel training, and also proposes higher requirements on this type of personnel training institutions. In view of the demands of society and different majors on personnel, an enhancement to the standardized management of electronic laboratory operations becomes one of the important tasks for personnel training institutions. In this paper, how to practice the standardization management in an all-round way is discussed centered at college and university students＇ electronic laboratory.
基金Supported by National Natural Science Foundation of China (No. 61036004 and No. 61076024)
文摘A 10-bit single-slope analog-to-digital converter (ADC) for time-delay-integration CMOS image sensor was proposed. A programmable ramp generator was applied to accomplish the error calibration and improve the linearity. The ADC was fabricated in a 180 nm 1P4M CMOS process. Experimental results indicate that the differential nonlinearity and integral nonlinearity were 0.51/-0.53 LSB and 0.63/-0.71 LSB, respectively. The sampling rate of the ADC was 32 kHz.
基金Supported by National Science and Technology Major Project of China(No.2012ZX03004008)
文摘An error correction technique to achieve a 14-bit successive approximation register analog-to-digital converter(SAR ADC) is proposed. A tunable split capacitor is designed to eliminate the mismatches caused by parasitic capacitors. The linearity error of capacitor array caused by process mismatch is calibrated by a novel calibration capacitor array that can improve the sampling rate. The dual-comparator topology ensures both the speed and precision of the ADC. The simulation results show that the SAR ADC after calibration achieves 83.07 dB SNDR and 13.5 bit ENOB at 500 kilosamples/s.
文摘The arrival of the information age, especially development and popularization of digital and network, which fundamentally changes the development process of the library, the library＇ s status as Literature Resource Center has been hit. As the core work of the Library Document Resources Construction in concepts, content structure and evaluation etc. also undergone profound changes, a series of new problems have taken out, which we need to think and solve. In this passage, we discussed from the problem facing of Document Resources Construction work in the digital environment and how to deal with these challenges.
文摘At present, the reform of colleges and universities in our country is in full swing. In the course of teaching design of art in colleges and universities, it is necessary to change the teaching mode in time to adapt to the new teaching development environment. In the era of digital development, we need to give full attention to the optimization of art design teaching in colleges and universities, and run new teaching techniques. This paper mainly analyzes the advantages and importance of the digital art design in colleges and universities, and then discusses the application of digital technology in the art design teaching and the concrete teaching optimiTatiun strategy in detail. Hoping to through this theoretical research, contribute to the improvement of the quality of art design teaching.
基金supported by the China National Special Fund for Earthquake Scientific Research in Public Interests(201308009)
文摘To calculate the deviations between single station magnitudes and average ones by the magnitude residual statistical method,the paper selects 13086 seismic events recorded by the Gansu broadband digital seismic network from January 2009 to December 2012. The frequency distribution and quantitative statistics of the deviations of earthquake magnitude are analyzed. The MLcalibration function is modified and a uniform local magnitude system characteristic of the Gansu region,is obtained.
文摘The globalization development of science and technology makes academic English education in Chinese universities become a trend, and the establishment and application of digital teaching environment also provides an efficient technical support for the teaching and practice of Academic English. Through its own characteristics and Academic English teaching requirements analysis, understand the function and role of digital environment in academic English teaching and trying to propose effective strategies for Academic English Teaching Practice Exploration.
文摘This work explores the feasibility of a novel predictive control strategy on a power factor correction system. The proposed control strategy allows a significant reduction of the power losses respect to a classical predictive control strategy working with a fixed execution time Ts. The proposed control strategy operates with a variable execution time T~, and it has been implemented using a low cost hardware platform based on TI~ TMS320F2812 DSP. The chosen platform is capable to execute a control strategy code with a variable execution time T,. This operation can be performed by setting in proper manner, the timer registers of one of two event manager A/B blocks present on the mentioned DSP （digital signal processor）.
基金supported by the National Basic Research Program of China(Grant No.2014CB744803)
文摘The prediction of laminar-turbulent transition in boundary layer is very important for obtaining accurate aerodynamic characteristics with computational fluid dynamic(CFD)tools,because laminar-turbulent transition is directly related to complex flow phenomena in boundary layer and separated flow in space.Unfortunately,the transition effect isn’t included in today’s major CFD tools because of non-local calculations in transition modeling.In this paper,Menter’sγ-Re_θtransition model is calibrated and incorporated into a Reynolds-Averaged Navier-Stokes(RANS)code-Trisonic Platform(TRIP)developed in China Aerodynamic Research and Development Center(CARDC).Based on the experimental data of flat plate from the literature,the empirical correlations involved in the transition model are modified and calibrated numerically.Numerical simulation for low-speed flow of Trapezoidal Wing(Trap Wing)is performed and compared with the corresponding experimental data.It is indicated that theγ-Re_θtransition model can accurately predict the location of separation-induced transition and natural transition in the flow region with moderate pressure gradient.The transition model effectively imporves the simulation accuracy of the boundary layer and aerodynamic characteristics.
