Early cultivator Zhongzao 1(indica)and late rice cultivar Xiushui 2(japonica)were used for field experiments.Seedlings were transplantedon May 13 and Jun 28 respectively in spaced at5 cm between row and 4 cm within ro...Early cultivator Zhongzao 1(indica)and late rice cultivar Xiushui 2(japonica)were used for field experiments.Seedlings were transplantedon May 13 and Jun 28 respectively in spaced at5 cm between row and 4 cm within row with 4plants per hill.Treatments were started at thetime when the young plants had 80~ available展开更多
A lateral current regulator diode （CRD） with field plates is proposed and experimentally demonstrated. The proposed CFtD is based on the junction field-effect transistor （JFET） structure. A cathode field plate is ...A lateral current regulator diode （CRD） with field plates is proposed and experimentally demonstrated. The proposed CFtD is based on the junction field-effect transistor （JFET） structure. A cathode field plate is adopted to alleviate the channel-length modulation effect and to improve the saturated I-V characteristics. An anode field plate is induced to achieve a high breakdown voltage VB of the CRD. The influence of the key device parameters on the I-V characteristics of the lateral CRD are discussed. Experimental results show that the proposed CRD presents good I-V characteristics with a high VB about 180 V and a low knee voltage （Vk） below 3 V. Furthermore, the proposed CRD has a negative temperature coefficient. The well characteristic of the proposed CRD makes it a cost-effective solution for light-emitting-diode lighting.展开更多
Use of nonlinearconductive SiC/silicone rubber(SR)field grading material(FGM)can improve the local field concentration of composite insulators.Adding large volume fraction and large-size SiC particles(SiCp)into SR can...Use of nonlinearconductive SiC/silicone rubber(SR)field grading material(FGM)can improve the local field concentration of composite insulators.Adding large volume fraction and large-size SiC particles(SiCp)into SR can obtain a good field grading effect,but it is accompanied by the deterioration of mechanical properties.Compounding SiC with different shapes can solve this contradiction.By incorporating one-dimensional SiC whiskers(SiCw)to synergize with granular SiCp,SiC/SR FGM with better field-dependent conductivity,mechanical properties and thermal conductivity than large-size SiCp and large volume fraction filling case can be obtained by using smaller size SiCp and lower filling contents.The simulations of 500 kv line insulators show that the modified SiC/SR FGM can reduce the maximum field strength along the insulator surface and at sheath-core rod interfaces by 55%and 71.4%,respectively.The combined application of FGM and grading ring can achieve a complementary effect.Using FGM to partially replace the role of the grading rings,the field strength indicators can still meet the operational requirements after the tube radius and shielding depth of the grading rings at both ends are reduced by 36.2%and 40%separately,which is a benefit to alleviating the problems of high weight and large volume faced by traditional field grading methods.展开更多
We report a tunable transverse magnetoresistance of the planar Hall effect(PHE),up to 48%in the Ni80Fe20/HfO2 heterostructures.This control is achieved by applying a gate voltage with an ionic liquid technique at ultr...We report a tunable transverse magnetoresistance of the planar Hall effect(PHE),up to 48%in the Ni80Fe20/HfO2 heterostructures.This control is achieved by applying a gate voltage with an ionic liquid technique at ultra-low voltage,which exhibits a gate-dependent PHE.Moreover,in the range of 0-V to 1-V gate voltage,transverse magnetoresistance of PHE can be continuously regulated.Ferromagnetic resonance(FMR)also demonstrates the shift of the resonance field at low gate voltage.This provides a new method for the design of the electric field continuous control spintronics device with ultra-low energy consumption.展开更多
As the fourth-generation light source,solid-state lighting has developed rapidly in the past 30 years due to its advantages of high efficiency and environmental protection.It is widely used in various scenes such as a...As the fourth-generation light source,solid-state lighting has developed rapidly in the past 30 years due to its advantages of high efficiency and environmental protection.It is widely used in various scenes such as automobile headlights,projection displays,industrial production,and remote lighting.High-power,high-brightness white light-emitting diodes(LEDs)and laser diodes(LDs)technology put forward new requirements for the service stability of color conversion materials.Garnet phosphor ceramics have emerged with their unique advantages of withstanding high power excitation density and the flexibly tunable spectrum.In this article,the research progress of garnet based phosphor ceramics for high-power solid-state lighting was comprehensively reviewed.Firstly,the band gap and coordination environment regulations of luminescence centers of garnet phosphor were summarized.Secondly,the improvement of luminous efficacy via defects regulation was discussed.Thirdly,the relationship between the geometric design and the lighting performance was elucidated.Fourthly,the characterization methods of phosphor ceramics for laser lighting were introduced and illustrated.Finally,the development trend of garnet phosphor ceramics in solid state lighting and display was prospected.展开更多
文摘Early cultivator Zhongzao 1(indica)and late rice cultivar Xiushui 2(japonica)were used for field experiments.Seedlings were transplantedon May 13 and Jun 28 respectively in spaced at5 cm between row and 4 cm within row with 4plants per hill.Treatments were started at thetime when the young plants had 80~ available
基金Supported by the National Natural Science Foundation of China under Grant No 61376080
文摘A lateral current regulator diode （CRD） with field plates is proposed and experimentally demonstrated. The proposed CFtD is based on the junction field-effect transistor （JFET） structure. A cathode field plate is adopted to alleviate the channel-length modulation effect and to improve the saturated I-V characteristics. An anode field plate is induced to achieve a high breakdown voltage VB of the CRD. The influence of the key device parameters on the I-V characteristics of the lateral CRD are discussed. Experimental results show that the proposed CRD presents good I-V characteristics with a high VB about 180 V and a low knee voltage （Vk） below 3 V. Furthermore, the proposed CRD has a negative temperature coefficient. The well characteristic of the proposed CRD makes it a cost-effective solution for light-emitting-diode lighting.
基金supported by Science and Technology Project of State Grid Corporation of China(7000-202158440A-0-0-00)。
文摘Use of nonlinearconductive SiC/silicone rubber(SR)field grading material(FGM)can improve the local field concentration of composite insulators.Adding large volume fraction and large-size SiC particles(SiCp)into SR can obtain a good field grading effect,but it is accompanied by the deterioration of mechanical properties.Compounding SiC with different shapes can solve this contradiction.By incorporating one-dimensional SiC whiskers(SiCw)to synergize with granular SiCp,SiC/SR FGM with better field-dependent conductivity,mechanical properties and thermal conductivity than large-size SiCp and large volume fraction filling case can be obtained by using smaller size SiCp and lower filling contents.The simulations of 500 kv line insulators show that the modified SiC/SR FGM can reduce the maximum field strength along the insulator surface and at sheath-core rod interfaces by 55%and 71.4%,respectively.The combined application of FGM and grading ring can achieve a complementary effect.Using FGM to partially replace the role of the grading rings,the field strength indicators can still meet the operational requirements after the tube radius and shielding depth of the grading rings at both ends are reduced by 36.2%and 40%separately,which is a benefit to alleviating the problems of high weight and large volume faced by traditional field grading methods.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.51671099 and 11974149)the Open Foundation Project of Jiangsu Key Laboratory of Thin Films(Grant No.KJS1745)+1 种基金the Program for Changjiang Scholars and Innovative Research Team in University,China(Grant No.IRT16R35)the Fundamental Research Funds for the Central Universities,China.
文摘We report a tunable transverse magnetoresistance of the planar Hall effect(PHE),up to 48%in the Ni80Fe20/HfO2 heterostructures.This control is achieved by applying a gate voltage with an ionic liquid technique at ultra-low voltage,which exhibits a gate-dependent PHE.Moreover,in the range of 0-V to 1-V gate voltage,transverse magnetoresistance of PHE can be continuously regulated.Ferromagnetic resonance(FMR)also demonstrates the shift of the resonance field at low gate voltage.This provides a new method for the design of the electric field continuous control spintronics device with ultra-low energy consumption.
基金supported by the National Key Research and Development Program of China (2021YFF0500600)National Natural Science Foundation of China (No.U2001220)+1 种基金Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center (XMHT20200203006)Shenzhen Technical Plan Project (RCJC20200714114436091,JCYJ20220818101003007,and JCYJ20220818101003008)。
基金This work was financially supported from the National Key Re-search and Development Program of China(No.2021YFB3501700)the National Natural Science Foundation of China(Nos.52202135,61975070,51902143 and 61971207)+7 种基金the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)the Key Research and Development Project of Jiangsu Province(Nos.BE2021040 and BE2019033)the Natural Science Foundation of Jiangsu Province(Nos.BK20191467 and BK20221226)the Postgrad-uate Research&Practice Innovation Program of Jiangsu Province(No.KYCX21_2568)the International S&T Cooperation Program of Jiangsu Province(Nos.BZ2019063,BZ2020045 and BZ2020030)the Natural Science Foundation of the Jiangsu Higher Education In-stitutes of China(Nos.19KJB430018 and 20KJA430003)the Special Project for Technology Innovation of Xuzhou City(Nos.KC19250,KC20201,KC20244 and KC21379)Open Project of State Key Laboratory of Advanced Materials and Electronic Components(No.FHR-JS-202011017).The authors would like to show great appreci-ation to Prof.Ole Bjarlin Jensen from the Technical University of Denmark for his long-term support and guidance on diode laser-related knowledge and technique.
文摘As the fourth-generation light source,solid-state lighting has developed rapidly in the past 30 years due to its advantages of high efficiency and environmental protection.It is widely used in various scenes such as automobile headlights,projection displays,industrial production,and remote lighting.High-power,high-brightness white light-emitting diodes(LEDs)and laser diodes(LDs)technology put forward new requirements for the service stability of color conversion materials.Garnet phosphor ceramics have emerged with their unique advantages of withstanding high power excitation density and the flexibly tunable spectrum.In this article,the research progress of garnet based phosphor ceramics for high-power solid-state lighting was comprehensively reviewed.Firstly,the band gap and coordination environment regulations of luminescence centers of garnet phosphor were summarized.Secondly,the improvement of luminous efficacy via defects regulation was discussed.Thirdly,the relationship between the geometric design and the lighting performance was elucidated.Fourthly,the characterization methods of phosphor ceramics for laser lighting were introduced and illustrated.Finally,the development trend of garnet phosphor ceramics in solid state lighting and display was prospected.
