We propose a new full color ghost imaging scheme using both time and code division multiplexing technologies.In the scheme,the speckle patterns of three colors(red,green and blue)are modulated with different time slot...We propose a new full color ghost imaging scheme using both time and code division multiplexing technologies.In the scheme,the speckle patterns of three colors(red,green and blue)are modulated with different time slots and codes.The light intensity is sampled by one bucket detector.Then based on the modulated time slots and codes,we can effectively and simultaneously extract three detection component signals corresponding to three color components of objects from the sampling signal of the bucket detector.Finally,three component images resulting from the three component detection signals can be synthesized into a full color image.The experimental results verify the feasibility of our scheme under the limit of the number of time slots and codes.Moreover,our scheme reduces the number of bucket detectors and can realize high quality imaging even in a noisy environment.展开更多
Based on statistical properties, two typical models are considered to calculate the uncertainties for some random noise sequences on the period extraction of a torsion pendulum, which is important and instructive in t...Based on statistical properties, two typical models are considered to calculate the uncertainties for some random noise sequences on the period extraction of a torsion pendulum, which is important and instructive in the measurement of gravitational constant G with the time-of-swing method. An expression of the uncertainty for the period measurement is obtained, which is dependent on the ratio ？t/（1/λ） where ？t is the interval of the sample time and 1/λ is the length of the correlation time. The result of processing experimental data shows that as the interval of the sample time ？t gradually shortens, the uncertainty of the period becomes smaller, and further when the ratio ？t/（1/λ） is less than 1, the uncertainty remains substantially unchanged.展开更多
The steady states and the transient properties of an insect outbreak model driven by Gaussian colored noise are studied in this paper. According to the Fokker-Planck equation in the unified colored-noise approximation...The steady states and the transient properties of an insect outbreak model driven by Gaussian colored noise are studied in this paper. According to the Fokker-Planck equation in the unified colored-noise approximation, we analyse the stationary probability distribution and the mean first-passage time of this model. By numerical analysis, the effects of the self-correlation time of insect birth rate and predation rate respectively reveal a manifest population divergence on the insect density. The decrease of the mean first-passage time indicates an enhancement dynamic on the density divergency with colored noise of a large self-correlation time based on the insect outbreak model.展开更多
In certain environments and under some conditions, the video images taken by the intelligent mobile video phones seem dark, and the colors are not bright or saturated enough.This paper presents an adaptive method to e...In certain environments and under some conditions, the video images taken by the intelligent mobile video phones seem dark, and the colors are not bright or saturated enough.This paper presents an adaptive method to enhance the video image brightness visualization and the color performance depending on the certain hardware property and function parameters. The experimental results prove that this method can enhance the colors and the contrast of the video images, based on the estimated quality feature values of each frame, without using the extra Digital Signal Processor (DSP).展开更多
Dusky blue, verdant green, romantic pink, bright yellow…various color fulfill the normal life of human being everyday. Sometimes, maybe, color also could help you making a decision.
为探究冻融循环对食用菌预制菌汤的品质影响,本文以鲜菌汤为参照,对比了冻融过程中微生物数量、菌汤色泽、可溶性蛋白、还原糖、总酚含量等基本指标的变化,并基于超高效液相检测和气相色谱-质谱法分析冻融过程菌汤等鲜度和挥发性风味物...为探究冻融循环对食用菌预制菌汤的品质影响,本文以鲜菌汤为参照,对比了冻融过程中微生物数量、菌汤色泽、可溶性蛋白、还原糖、总酚含量等基本指标的变化,并基于超高效液相检测和气相色谱-质谱法分析冻融过程菌汤等鲜度和挥发性风味物质差异。研究表明,首次冻融大幅减少了菌汤的还原糖、总酚和总氨基酸含量,显著降低了菌汤等鲜度和挥发性成分含量,综合影响了菌汤的成分与风味。进一步通过冻融次数(1~5次)之间的对比,反复冻融3次菌汤可溶性蛋白含量相较于冻融1~2次显著降低(P<0.05),此外,等鲜度由1~2次冻融的0.441~0.450 g MSG/100 g直接下降至0.407 g MSG/100 g,同时微生物开始检出。在此后4~5次冻融过程中,虽然菌汤总酚、总氨基酸含量和等鲜度相对稳定,但核苷酸、可溶性蛋白和挥发性成分不断减少且菌落总数不断升高。因此,预制菌汤若需冻融处理则应控制在2次内为宜。展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.62001249 and 61871234)the NUPTSF(Grant No.NY220004)the Scientific Research Project of College of Information Engineering,Fuyang Normal University(Grant No.FXG2021ZZ02)。
文摘We propose a new full color ghost imaging scheme using both time and code division multiplexing technologies.In the scheme,the speckle patterns of three colors(red,green and blue)are modulated with different time slots and codes.The light intensity is sampled by one bucket detector.Then based on the modulated time slots and codes,we can effectively and simultaneously extract three detection component signals corresponding to three color components of objects from the sampling signal of the bucket detector.Finally,three component images resulting from the three component detection signals can be synthesized into a full color image.The experimental results verify the feasibility of our scheme under the limit of the number of time slots and codes.Moreover,our scheme reduces the number of bucket detectors and can realize high quality imaging even in a noisy environment.
基金supported by the National Natural Science Foundation of China(Grant Nos.11175160,11275075,and 11575160)
文摘Based on statistical properties, two typical models are considered to calculate the uncertainties for some random noise sequences on the period extraction of a torsion pendulum, which is important and instructive in the measurement of gravitational constant G with the time-of-swing method. An expression of the uncertainty for the period measurement is obtained, which is dependent on the ratio ？t/（1/λ） where ？t is the interval of the sample time and 1/λ is the length of the correlation time. The result of processing experimental data shows that as the interval of the sample time ？t gradually shortens, the uncertainty of the period becomes smaller, and further when the ratio ？t/（1/λ） is less than 1, the uncertainty remains substantially unchanged.
基金Project supported by the Natural Science Basic Research Plan in Shaanxi Province,China (Grant No. SJ08A12)the Science Foundation of the Education Bureau of Shaanxi Province,China (Grant No. 12JK0962)the Science Foundation of Baoji University of Science and Arts of China (Grant No. ZK11053)
文摘The steady states and the transient properties of an insect outbreak model driven by Gaussian colored noise are studied in this paper. According to the Fokker-Planck equation in the unified colored-noise approximation, we analyse the stationary probability distribution and the mean first-passage time of this model. By numerical analysis, the effects of the self-correlation time of insect birth rate and predation rate respectively reveal a manifest population divergence on the insect density. The decrease of the mean first-passage time indicates an enhancement dynamic on the density divergency with colored noise of a large self-correlation time based on the insect outbreak model.
文摘In certain environments and under some conditions, the video images taken by the intelligent mobile video phones seem dark, and the colors are not bright or saturated enough.This paper presents an adaptive method to enhance the video image brightness visualization and the color performance depending on the certain hardware property and function parameters. The experimental results prove that this method can enhance the colors and the contrast of the video images, based on the estimated quality feature values of each frame, without using the extra Digital Signal Processor (DSP).
文摘Dusky blue, verdant green, romantic pink, bright yellow…various color fulfill the normal life of human being everyday. Sometimes, maybe, color also could help you making a decision.
文摘为探究冻融循环对食用菌预制菌汤的品质影响,本文以鲜菌汤为参照,对比了冻融过程中微生物数量、菌汤色泽、可溶性蛋白、还原糖、总酚含量等基本指标的变化,并基于超高效液相检测和气相色谱-质谱法分析冻融过程菌汤等鲜度和挥发性风味物质差异。研究表明,首次冻融大幅减少了菌汤的还原糖、总酚和总氨基酸含量,显著降低了菌汤等鲜度和挥发性成分含量,综合影响了菌汤的成分与风味。进一步通过冻融次数(1~5次)之间的对比,反复冻融3次菌汤可溶性蛋白含量相较于冻融1~2次显著降低(P<0.05),此外,等鲜度由1~2次冻融的0.441~0.450 g MSG/100 g直接下降至0.407 g MSG/100 g,同时微生物开始检出。在此后4~5次冻融过程中,虽然菌汤总酚、总氨基酸含量和等鲜度相对稳定,但核苷酸、可溶性蛋白和挥发性成分不断减少且菌落总数不断升高。因此,预制菌汤若需冻融处理则应控制在2次内为宜。
