Preservation technology of light control has received the widespread atten-tion for its safety,green,environmental-protection,high efficiency.It has become the hotspot in the area of postharvest vegetables preservatio...Preservation technology of light control has received the widespread atten-tion for its safety,green,environmental-protection,high efficiency.It has become the hotspot in the area of postharvest vegetables preservation.It could mainly be divid-ed into three categories:LED preservation,UV preservation and radiation preserva-tion.This paper systematically reviewed the mechanisms of different preservation technology of light control,summarized the research progress of light-controlled tech-nology in the physiological characteristics regulation,maintenance of nutritional quali-ty and microbial control of postharvest vegetables at home and aborad,and prospected the further studies on preservation technology for postharvest vegetables.展开更多
Atom–nanowire coupling system is a promising platform for optical quantum information processing. Unlike the previous designing of optical switch and transistor requiring a dedicated multi-level emitter and high fine...Atom–nanowire coupling system is a promising platform for optical quantum information processing. Unlike the previous designing of optical switch and transistor requiring a dedicated multi-level emitter and high fineness microcavity,a new proposal is put forward which contains a single two-level atom asymmetrically coupled with two nanowires. Singleemitter manipulation of photonic signals for bilateral coherent incident is clear now, since we specify atomic saturation nonlinearity into three contributions which brings us a new approach to realizing light-controlled-light at weak light and single-atom levels. An efficient optically controllable switch based on self-matching-induced-block and a concise optical transistor are proposed. Our findings show potential applications in full-optical devices.展开更多
Programmable digital coding metasurfaces(PDCMs)can manipulate electromagnetic waves with high degrees of freedom,significantly enriching metasurface designs.However,most PDCMs are limited to the control of a single po...Programmable digital coding metasurfaces(PDCMs)can manipulate electromagnetic waves with high degrees of freedom,significantly enriching metasurface designs.However,most PDCMs are limited to the control of a single polarization,which cannot meet the requirements of the high integration of intelligent components.To further improve the practicability and flexibility of metasurfaces,we propose an integrated paradigm for spin-decoupling PDCMs based on light emitting diode arrays that fully embed the photoresistor as a part of the meta-atom to independently manipulate the wavefront in different polarizations.As a proof of concept,PDCMs were simulated,fabricated,and measured to verify the feasibility and effectiveness of the proposed method.The functions of scattering and vortices are verified at different polarizations,demonstrating that the metasurface can tailor the EM functions in six channels.This study can improve the integration of intelligent control metasurfaces and lay a solid foundation for their development.展开更多
With the development of metabolic engineering,increasing requirements for efficient microbial biosynthesis call for establishment of multi-strain co-culture system.Dynamic regulation of population ratios is crucial fo...With the development of metabolic engineering,increasing requirements for efficient microbial biosynthesis call for establishment of multi-strain co-culture system.Dynamic regulation of population ratios is crucial for optimizing bioproduction performance.Optogenetic systems with high universality and flexibility have the potential to realize dynamic control of population proportion.In this study,we utilized an optimized chromatic acclimation sensor/regulator(CcaS/R)system and a blue light-activated YF1-FixJ-PhlF system as induction modules.A pair of orthogonal quorum sensing systems and a toxin-antitoxin system were employed as communication module and effector module,respectively.By integrating these modules,we developed a dual light-controlled co-culture system that enables dynamic regulation of population ratios.This co-culture system provides a universal toolkit for applications in metabolic engineering and synthetic biology.展开更多
Programmable metasurfaces enable real-time control of electromagnetic waves in a digital coding manner,which are suitable for implementing time-domain metasurfaces with strong harmonic manipulation capabilities.Howeve...Programmable metasurfaces enable real-time control of electromagnetic waves in a digital coding manner,which are suitable for implementing time-domain metasurfaces with strong harmonic manipulation capabilities.However,the time-domain metasurfaces are usually realized by adopting the wired electrical control method,which is effective and robust,but there are still some limitations.Here,we propose a light-controllable time-domain digital coding metasurface consisting of a full-polarization dynamic metasurface and a high-speed photoelectric detection circuit,from which the microwave reflection spectra are manipulated by time-varying light signals with periodic phase modulations.As demonstrated,the light-controllable timedomain digital coding metasurface is illuminated by the light signals with two designed time-coding sequences.The measured results show that the metasurface can well generate symmetrical harmonics and white-noise-like spectra,respectively,under such cases in the reflected wave.The proposed lightcontrollable time-varying metasurface offers a planar interface to tailor and link microwaves with lights in the time domain,which could promote the development of photoelectric hybrid metasurfaces and related multiphysics applications.展开更多
Theranostic prodrugs are promising for cancer medicine;however,the inability to activate these systems exclusively at the desired tumor location compromises the specificity and efficacy of cancer treatment.Here,we dev...Theranostic prodrugs are promising for cancer medicine;however,the inability to activate these systems exclusively at the desired tumor location compromises the specificity and efficacy of cancer treatment.Here,we developed a fluorescent theranostic nanoprodrug with synergistic hydrogen-sulfidespecific and near-infrared(NIR)-light-controllable activation for imaging-guided chemo-photothermal cancer therapy.This nanoprodrug system was fabricated by the inclusion of hydrogen sulfide(H2S)-activatable small molecule to the theranostic prodrug and a photothermal transducer in the interior of a NIR-light-responsive container.展开更多
During the mass formation of aggregates of molecules in a gelatin film dyed with the mixture of chrysophenine and acridine yellow dyes, photo-reorientation, photo-disorientation, and photo-orientation of the molecules...During the mass formation of aggregates of molecules in a gelatin film dyed with the mixture of chrysophenine and acridine yellow dyes, photo-reorientation, photo-disorientation, and photo-orientation of the molecules are observed. Based on these observations, the photo-induction of granular aniso tropy may be realized.展开更多
随着双有源桥(Dual active bridge,DAB)变换器工作频率的不断提高,开关损耗对传输效率的影响也在不断增加。DAB变换器通过采用合适的软开关控制策略,来尽可能实现全开关器件的软开关,但轻载工况下的死区重叠现象使软开关条件产生了冲突...随着双有源桥(Dual active bridge,DAB)变换器工作频率的不断提高,开关损耗对传输效率的影响也在不断增加。DAB变换器通过采用合适的软开关控制策略,来尽可能实现全开关器件的软开关,但轻载工况下的死区重叠现象使软开关条件产生了冲突,这种现象在高频轻载条件下尤为突出。为了提高DAB变换器在高频轻载条件下的能量传输效率,对轻载条件下的死区重叠现象进行了分析,结合缓冲电容对死区过程的影响,提出了以电流应力为优化目标的三自由度控制策略。最后,通过试验验证了分析过程的正确性和所提控制策略的有效性。展开更多
基金Supported by the National Key Research and Development Program of China(2016YFD0400901)the China Agricultural Research System for Staple Vegetables(CARS-25)+2 种基金the National Natural Science Foundation of China(31401536)the Research and Demonstration of Ecological and High-efficient Production Technology for Horticultural Plants in the Uncultivated Area of Northwest China(201203095)the Youth Foundation of Beijing Academy of Agriculture and Forestry Sciences(201709)~~
文摘Preservation technology of light control has received the widespread atten-tion for its safety,green,environmental-protection,high efficiency.It has become the hotspot in the area of postharvest vegetables preservation.It could mainly be divid-ed into three categories:LED preservation,UV preservation and radiation preserva-tion.This paper systematically reviewed the mechanisms of different preservation technology of light control,summarized the research progress of light-controlled tech-nology in the physiological characteristics regulation,maintenance of nutritional quali-ty and microbial control of postharvest vegetables at home and aborad,and prospected the further studies on preservation technology for postharvest vegetables.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11864018 and 11574229)the Scientific Research Foundation of Education Department of Jiangxi Province,China(Grant No.GJJ170645)the Doctor Startup Fund of the Natural Science of Jinggangshan University,China(Grant No.JZB16003)
文摘Atom–nanowire coupling system is a promising platform for optical quantum information processing. Unlike the previous designing of optical switch and transistor requiring a dedicated multi-level emitter and high fineness microcavity,a new proposal is put forward which contains a single two-level atom asymmetrically coupled with two nanowires. Singleemitter manipulation of photonic signals for bilateral coherent incident is clear now, since we specify atomic saturation nonlinearity into three contributions which brings us a new approach to realizing light-controlled-light at weak light and single-atom levels. An efficient optically controllable switch based on self-matching-induced-block and a concise optical transistor are proposed. Our findings show potential applications in full-optical devices.
基金supported in part by the National Key Research and Development Program of China under Grant 2022YFB3806200the National Natural Science Foundation of China under Grants 62101588 and 62201609.
文摘Programmable digital coding metasurfaces(PDCMs)can manipulate electromagnetic waves with high degrees of freedom,significantly enriching metasurface designs.However,most PDCMs are limited to the control of a single polarization,which cannot meet the requirements of the high integration of intelligent components.To further improve the practicability and flexibility of metasurfaces,we propose an integrated paradigm for spin-decoupling PDCMs based on light emitting diode arrays that fully embed the photoresistor as a part of the meta-atom to independently manipulate the wavefront in different polarizations.As a proof of concept,PDCMs were simulated,fabricated,and measured to verify the feasibility and effectiveness of the proposed method.The functions of scattering and vortices are verified at different polarizations,demonstrating that the metasurface can tailor the EM functions in six channels.This study can improve the integration of intelligent control metasurfaces and lay a solid foundation for their development.
基金supported by the financial grant from National Natural Science Foundation of China(82071383,82371392)Natural Science Foundation of Shandong Province(Key Project,ZR2020KH007)+5 种基金the"Taishan Scholar Distinguished Expert Program"of Shandong Province(tstp20231257)Natural Science Foundation of Shandong Province(ZR2022QC222)Shandong Province Medical and Health Science and Technology Project(202404070807)Youth Science Foundation of Shandong First Medical University(202201-132)Talent Introduction of Jinan Central Hospital(YJRC2022002)Science and Technology Development Program of Jinan Municipal Health Commission(2024102001).
文摘With the development of metabolic engineering,increasing requirements for efficient microbial biosynthesis call for establishment of multi-strain co-culture system.Dynamic regulation of population ratios is crucial for optimizing bioproduction performance.Optogenetic systems with high universality and flexibility have the potential to realize dynamic control of population proportion.In this study,we utilized an optimized chromatic acclimation sensor/regulator(CcaS/R)system and a blue light-activated YF1-FixJ-PhlF system as induction modules.A pair of orthogonal quorum sensing systems and a toxin-antitoxin system were employed as communication module and effector module,respectively.By integrating these modules,we developed a dual light-controlled co-culture system that enables dynamic regulation of population ratios.This co-culture system provides a universal toolkit for applications in metabolic engineering and synthetic biology.
基金supported by the China National Postdoctoral Program for Innovative Talents (Grant No. BX2021063)the China Postdoctoral Science Foundation (Grant No. 2021M700762)+4 种基金the National Key Research and Development Program of China (Grant Nos. 2017YFA0700201, 2017YFA0700203, and 2016YFC0800401)the National Natural Science Foundation of China (Grant Nos. 61890544, 61631007, 61571117, 61731010, 61735010, 61722106, 61701107, and 61701108)the Fundamental Research Funds for the Central Universities (Grant No 2242021k30040)the Foundation of National Excellent Doctoral Dissertation of China (Grant No. 201444)the 111 Project (Grant No. 111-2-05)
文摘Programmable metasurfaces enable real-time control of electromagnetic waves in a digital coding manner,which are suitable for implementing time-domain metasurfaces with strong harmonic manipulation capabilities.However,the time-domain metasurfaces are usually realized by adopting the wired electrical control method,which is effective and robust,but there are still some limitations.Here,we propose a light-controllable time-domain digital coding metasurface consisting of a full-polarization dynamic metasurface and a high-speed photoelectric detection circuit,from which the microwave reflection spectra are manipulated by time-varying light signals with periodic phase modulations.As demonstrated,the light-controllable timedomain digital coding metasurface is illuminated by the light signals with two designed time-coding sequences.The measured results show that the metasurface can well generate symmetrical harmonics and white-noise-like spectra,respectively,under such cases in the reflected wave.The proposed lightcontrollable time-varying metasurface offers a planar interface to tailor and link microwaves with lights in the time domain,which could promote the development of photoelectric hybrid metasurfaces and related multiphysics applications.
基金support by the National Natural Science Foundation of China(21672062,21874043,21572039,and 21788102)Shanghai Municipal Science and Technology Major Project(grant no.2018SHZDZX03)the Program of Introducing Talents of Discipline to Universities(B16017).
文摘Theranostic prodrugs are promising for cancer medicine;however,the inability to activate these systems exclusively at the desired tumor location compromises the specificity and efficacy of cancer treatment.Here,we developed a fluorescent theranostic nanoprodrug with synergistic hydrogen-sulfidespecific and near-infrared(NIR)-light-controllable activation for imaging-guided chemo-photothermal cancer therapy.This nanoprodrug system was fabricated by the inclusion of hydrogen sulfide(H2S)-activatable small molecule to the theranostic prodrug and a photothermal transducer in the interior of a NIR-light-responsive container.
文摘During the mass formation of aggregates of molecules in a gelatin film dyed with the mixture of chrysophenine and acridine yellow dyes, photo-reorientation, photo-disorientation, and photo-orientation of the molecules are observed. Based on these observations, the photo-induction of granular aniso tropy may be realized.
文摘随着双有源桥(Dual active bridge,DAB)变换器工作频率的不断提高,开关损耗对传输效率的影响也在不断增加。DAB变换器通过采用合适的软开关控制策略,来尽可能实现全开关器件的软开关,但轻载工况下的死区重叠现象使软开关条件产生了冲突,这种现象在高频轻载条件下尤为突出。为了提高DAB变换器在高频轻载条件下的能量传输效率,对轻载条件下的死区重叠现象进行了分析,结合缓冲电容对死区过程的影响,提出了以电流应力为优化目标的三自由度控制策略。最后,通过试验验证了分析过程的正确性和所提控制策略的有效性。
