We present new CCD photometry of the solar-type contact binary IU Cnc, which was observed from November 2017 to March 2018 with three small telescopes in China. BV light curves imply that IU Cnc is a W-type contact bi...We present new CCD photometry of the solar-type contact binary IU Cnc, which was observed from November 2017 to March 2018 with three small telescopes in China. BV light curves imply that IU Cnc is a W-type contact binary with total eclipses. The photometric solution indicates that the mass ratio and fill-out factor are q = 4.104 ± 0.004 and f = 30.2%± 0.3%, respectively. From all available light minimum times, the orbital period may increase at a rate of dP/dt =+6.93(4)× 10^-7 d yr^-1, which may result from mass transfer from the secondary component to the primary one. With mass transferring,IU Cnc may evolve from a contact configuration into a semi-detached configuration.展开更多
We present a long-term time-resolved photometry of the short-period eclipsing binary IU Per. It confirms the intrinsic 6 Scuti-like pulsation of the system reported by Kim et al.. With the obtained data, an orbital pe...We present a long-term time-resolved photometry of the short-period eclipsing binary IU Per. It confirms the intrinsic 6 Scuti-like pulsation of the system reported by Kim et al.. With the obtained data, an orbital period study and an eclipsing light curve synthesis based on the Wilson-Devinney method were carded out. The photometric solution reveals a semi-detached configuration with the less-massive component filling its own Roche-lobe. By subtracting the eclipsing light changes from the data, we obtained the pure pulsating light curve of the mass-accreting primary component. A Fourier analysis reveals four pulsation modes with confidence larger than 99%. A mode identification based on the results of the photometric solution was made. It suggests that the star may be in radial pulsation with a fundamental period of about 0.0628 d. A brief discussion concerning the evolutionary status and the pulsation nature is finally given.展开更多
Methods and concepts of innovation performance are widely analyzed, discussed, and evaluated. The influence of educational management on the creation of innovative economy is not widely described in literature, howeve...Methods and concepts of innovation performance are widely analyzed, discussed, and evaluated. The influence of educational management on the creation of innovative economy is not widely described in literature, however, procedures of innovation performance include the measures of educational elements. The paper discusses the methodology of European Innovation Scoreboard （EIS） and Innovation Union Scoreboard （IUS） in the aspect of education for innovative economy. Educational indicators in EIS/IUS methodology are quantitative and do not include information about the quality of education. Researchers agreed that innovation processes and economical growth require well-educated and skilled workforce and they assume that skilled workers are on output of the educational system. The measurement system of innovations in Europe includes various economical aspects, allows to observe trends and gives opportunity to improvement for countries and is directed on future educational effects. Quantitative indicators allow to observe trends, educational needs, desires of pupils, and their parents. The efficiency of these indicators is presented on the example of Poland. Educational indicators to improve innovation performance should be very synthetic, but cannot lose important information. The article presents author＇s research on graduate career paths and suggests to include elements of this methodology in the measurement system of innovation economy.展开更多
This article will introduce a new version of the metal deck for building residential flooring with a newly designed cold form U section. This flooring will allow residential structures to be built more quickly while a...This article will introduce a new version of the metal deck for building residential flooring with a newly designed cold form U section. This flooring will allow residential structures to be built more quickly while also reducing the necessary thickness of the floor. The level of strength and deflection of this floor will be determined via analysis of a floor bed comprised of cold-formed inverted U sections (IUS) covered by sheathing that is subjected to different loading scenarios. The necessary computational quantities associated with the experiment have been compared to established laboratory values by performing all related and applicable tests. Then, these quantities are compared to different existing flooring techniques to determine the efficacy of this technique. The results show that this flooring technique can be effective and cost-efficient in residential applications.展开更多
基金the National Natural Science Foundation of China (Nos. 11873003 and 11473009)the Natural Science Research Project (No. KJ 2017A850)+2 种基金the Outstanding Young Talents Program (No. gxyq2018161) of the Educational Department of Anhui Provinceby using 80-cm and 85-cm telescopes at the XLS of NAOCpartially supported by the Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences
文摘We present new CCD photometry of the solar-type contact binary IU Cnc, which was observed from November 2017 to March 2018 with three small telescopes in China. BV light curves imply that IU Cnc is a W-type contact binary with total eclipses. The photometric solution indicates that the mass ratio and fill-out factor are q = 4.104 ± 0.004 and f = 30.2%± 0.3%, respectively. From all available light minimum times, the orbital period may increase at a rate of dP/dt =+6.93(4)× 10^-7 d yr^-1, which may result from mass transfer from the secondary component to the primary one. With mass transferring,IU Cnc may evolve from a contact configuration into a semi-detached configuration.
基金Supported by the National Natural Science Foundation of China
文摘We present a long-term time-resolved photometry of the short-period eclipsing binary IU Per. It confirms the intrinsic 6 Scuti-like pulsation of the system reported by Kim et al.. With the obtained data, an orbital period study and an eclipsing light curve synthesis based on the Wilson-Devinney method were carded out. The photometric solution reveals a semi-detached configuration with the less-massive component filling its own Roche-lobe. By subtracting the eclipsing light changes from the data, we obtained the pure pulsating light curve of the mass-accreting primary component. A Fourier analysis reveals four pulsation modes with confidence larger than 99%. A mode identification based on the results of the photometric solution was made. It suggests that the star may be in radial pulsation with a fundamental period of about 0.0628 d. A brief discussion concerning the evolutionary status and the pulsation nature is finally given.
文摘Methods and concepts of innovation performance are widely analyzed, discussed, and evaluated. The influence of educational management on the creation of innovative economy is not widely described in literature, however, procedures of innovation performance include the measures of educational elements. The paper discusses the methodology of European Innovation Scoreboard （EIS） and Innovation Union Scoreboard （IUS） in the aspect of education for innovative economy. Educational indicators in EIS/IUS methodology are quantitative and do not include information about the quality of education. Researchers agreed that innovation processes and economical growth require well-educated and skilled workforce and they assume that skilled workers are on output of the educational system. The measurement system of innovations in Europe includes various economical aspects, allows to observe trends and gives opportunity to improvement for countries and is directed on future educational effects. Quantitative indicators allow to observe trends, educational needs, desires of pupils, and their parents. The efficiency of these indicators is presented on the example of Poland. Educational indicators to improve innovation performance should be very synthetic, but cannot lose important information. The article presents author＇s research on graduate career paths and suggests to include elements of this methodology in the measurement system of innovation economy.
文摘This article will introduce a new version of the metal deck for building residential flooring with a newly designed cold form U section. This flooring will allow residential structures to be built more quickly while also reducing the necessary thickness of the floor. The level of strength and deflection of this floor will be determined via analysis of a floor bed comprised of cold-formed inverted U sections (IUS) covered by sheathing that is subjected to different loading scenarios. The necessary computational quantities associated with the experiment have been compared to established laboratory values by performing all related and applicable tests. Then, these quantities are compared to different existing flooring techniques to determine the efficacy of this technique. The results show that this flooring technique can be effective and cost-efficient in residential applications.
