[ Objective ] The paper was to explore the relationship between character of rice stem and compressive strength. [ Method] The morphological and anatomical characters of stems of 10 rice varieties （including 3 intern...[ Objective ] The paper was to explore the relationship between character of rice stem and compressive strength. [ Method] The morphological and anatomical characters of stems of 10 rice varieties （including 3 internedes） were systematically studied by paraffin sectioning technology; the digital force tester was used to measure the compressive strengths of various varieties; the correlation between various characters and stem compressive strengths was analyzed. [ Result ] Correlation analysis showed that the outer diameter and cress-sectional area of stem had clese relation with longing resistance of stem, which could be adopted as the important factors for stem lodging resistance. The outer diameter and cross-sectional area of 63 Liangyou 636 was significantly higher than other tested varieties, 3 intemedes all had high comoressive strength, and the vleld was also high. [Conclusion] 63 Liangyou 636 could be used as the rice cultivar with super yield.展开更多
The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international partners.The complex comprises four accelerators:a 3...The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international partners.The complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs factory.In its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs bosons.Increasing the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of magnitude.This Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering aspects.Additionally,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection procedures.Construction is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 years.The commencement of experiments and data collection could potentially be initiated in the mid-2030s.展开更多
In this study,a friction piezoelectric hybrid nanogenerator(HNG)with a sponge-like structure was developed.A novel temporary solution template process was proposed to create smaller,uniformly distributed pores within ...In this study,a friction piezoelectric hybrid nanogenerator(HNG)with a sponge-like structure was developed.A novel temporary solution template process was proposed to create smaller,uniformly distributed pores within the sponge structure,allowing for the complete volatilization of the porous agent without causing structural defects.The output voltage of the porous HNG structure was nearly twice that of its solid structure,demonstrating superior electrical output performance.A peak-to-peak open circuit voltage of 168 V,a short circuit current density of 36.41μA cm^(-2),and a maximum power density of 32 W m^(-2) were obtained at a load resistance of 200 MΩ by periodically compressing an HNG with a dimension of 0.8 cm×0.8 cm.The generated electricity was sufficient to directly illuminate 180 tandem white LEDs and power small electronic devices.In addition,this study shows that the HNG could detect electrical signals from different parts of the human body during movement,suggesting significant potential for applications in energy harvesting and motion sensing.展开更多
基金Supported by National Natural Science Foundation of China (31100240)
文摘[ Objective ] The paper was to explore the relationship between character of rice stem and compressive strength. [ Method] The morphological and anatomical characters of stems of 10 rice varieties （including 3 internedes） were systematically studied by paraffin sectioning technology; the digital force tester was used to measure the compressive strengths of various varieties; the correlation between various characters and stem compressive strengths was analyzed. [ Result ] Correlation analysis showed that the outer diameter and cress-sectional area of stem had clese relation with longing resistance of stem, which could be adopted as the important factors for stem lodging resistance. The outer diameter and cross-sectional area of 63 Liangyou 636 was significantly higher than other tested varieties, 3 intemedes all had high comoressive strength, and the vleld was also high. [Conclusion] 63 Liangyou 636 could be used as the rice cultivar with super yield.
基金support from diverse funding sources,including the National Key Program for S&T Research and Development of the Ministry of Science and Technology(MOST),Yifang Wang's Science Studio of the Ten Thousand Talents Project,the CAS Key Foreign Cooperation Grant,the National Natural Science Foundation of China(NSFC)Beijing Municipal Science&Technology Commission,the CAS Focused Science Grant,the IHEP Innovation Grant,the CAS Lead Special Training Programthe CAS Center for Excellence in Particle Physics,the CAS International Partnership Program,and the CAS/SAFEA International Partnership Program for Creative Research Teams.
文摘The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international partners.The complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs factory.In its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs bosons.Increasing the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of magnitude.This Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering aspects.Additionally,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection procedures.Construction is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 years.The commencement of experiments and data collection could potentially be initiated in the mid-2030s.
基金supported by the National Basic Research Program of China(Grant No.2012CB934101)the National Natural Science Foundation of China(Grant No.51321092).
文摘In this study,a friction piezoelectric hybrid nanogenerator(HNG)with a sponge-like structure was developed.A novel temporary solution template process was proposed to create smaller,uniformly distributed pores within the sponge structure,allowing for the complete volatilization of the porous agent without causing structural defects.The output voltage of the porous HNG structure was nearly twice that of its solid structure,demonstrating superior electrical output performance.A peak-to-peak open circuit voltage of 168 V,a short circuit current density of 36.41μA cm^(-2),and a maximum power density of 32 W m^(-2) were obtained at a load resistance of 200 MΩ by periodically compressing an HNG with a dimension of 0.8 cm×0.8 cm.The generated electricity was sufficient to directly illuminate 180 tandem white LEDs and power small electronic devices.In addition,this study shows that the HNG could detect electrical signals from different parts of the human body during movement,suggesting significant potential for applications in energy harvesting and motion sensing.
