How to choose modulation frequency in the extra-high frequency geodimeter is directly related to a lot key matters such as distance sensitivity of instruments and degree of technological difficulty of modulation syste...How to choose modulation frequency in the extra-high frequency geodimeter is directly related to a lot key matters such as distance sensitivity of instruments and degree of technological difficulty of modulation system. This paper analyzes and proves that choice range of modulation frequency can be from 800 MHz up to extra-high frequency with the展开更多
The Wide Field Survey Telescope(WFST)is located at 4200 m on Saishiteng Mountain in Lenghu,Qinghai Province,China.It features a primary mirror with a diameter of 2.5 m and a camera equipped with nine CCDs,providing a ...The Wide Field Survey Telescope(WFST)is located at 4200 m on Saishiteng Mountain in Lenghu,Qinghai Province,China.It features a primary mirror with a diameter of 2.5 m and a camera equipped with nine CCDs,providing a wide field of view of approximately 3×3 square degrees.Calibration parameters are essential to ensure the precision of astrometric observations with the WFST.These parameters are derived from geometric distortion(GD)and gaps through astrometric modeling and are subsequently validated via the Yao’An High Precision Telescope(YAHPT).The GD solutions show maximum distortions between 1.18 and 10.29 pixels for the WFST chips,with central chips exhibiting lower distortion.After applying the GD correction,the precision of the WFST reaches 4 mas.The interchip gaps of the WFST range from 1.922 mm to 7.765 mm,corresponding to 10μm/pixel,aligning with the design and measurements.The calibrated parameters guarantee that the WFST can perform highly accurate astrometric measurements.Furthermore,as the WFST undergoes updates,the parameter model remains consistently applicable.展开更多
Shaanxi Electric Power（monthly issue）is a science and technology journal which is administrated by State Grid Corporation of China,sponsored by Shaanxi Electric Power Corporation.The journal mainly reflects the new ...Shaanxi Electric Power（monthly issue）is a science and technology journal which is administrated by State Grid Corporation of China,sponsored by Shaanxi Electric Power Corporation.The journal mainly reflects the new achievement,new technology,new trend in the fields ofdomestic＆international energy,electric technology.The scopeofShaanxi Electric Power covers new energy and distributed power generation,展开更多
Time-domain astrophysics will enter a golden era towards the end of this decade with the advent of major facilities across the electromagnetic spectrum and in the multi-messenger realms of gravitational wave and neutr...Time-domain astrophysics will enter a golden era towards the end of this decade with the advent of major facilities across the electromagnetic spectrum and in the multi-messenger realms of gravitational wave and neutrino.In the soft X-ray regime,the novel micro-pore lobster-eye optics provides a promising technology to realise,for the first time,focusing X-ray optics for wide-angle monitors to achieve a good combination of sensitivity and wide field of view.In this context Einstein Probe,a soft X-ray all-sky monitor mission,was proposed and selected as a candidate mission of priority in the space science programme of the Chinese Academy of Sciences.This paper reviews the most important science developments and key questions in this field towards 2020 and beyond,and how to achieve them technologically.It also introduces the Einstein Probe mission,including its key science goals and mission definition,as well as some of the key technological issues.展开更多
“2014（第八届）中国科学仪器发展年会（Annual Conference of China Scientific Instruments 2014，ACCSI 2014）”将于2014年4月18日在北京召开，将邀请相关领导、仪器公司、企业实验室、检测机构、科研院校等相关负责人出席本次年...“2014（第八届）中国科学仪器发展年会（Annual Conference of China Scientific Instruments 2014，ACCSI 2014）”将于2014年4月18日在北京召开，将邀请相关领导、仪器公司、企业实验室、检测机构、科研院校等相关负责人出席本次年会，力争把最新的行业政策法规、最前瞻的行业市场信息、最具有代表性的仪器新产品新技术在最短时间内呈现给各位参会代表，并对2013年中国科学仪器行业发展情况进行总结，展开更多
“中国科学仪器发展年会（Annual Conference of China Scientific Instruments，ACCSI）”自2006年开始已成功举办4届，目前已成为中国科学仪器行业影响力最大的高端会议之一。每年一届的“中国科学仪器发展年会”是为了促进中国科学...“中国科学仪器发展年会（Annual Conference of China Scientific Instruments，ACCSI）”自2006年开始已成功举办4届，目前已成为中国科学仪器行业影响力最大的高端会议之一。每年一届的“中国科学仪器发展年会”是为了促进中国科学仪器行业“政、产、学、研、用、资”等各方的有效交流，力求对中国科学仪器的新进展进行较为全面的总结，力争把新的行业政策法规、前瞻的行业市场信息、具有代表性的新技术及仪器研发新成果在短时间内呈现给各位参会代表。展开更多
由中国仪器仪表行业协会、中国仪器仪表学会、中国仪器仪表学会分析仪器分会、仪器信息网等单位主办、素有科学仪器行业“达沃斯论坛”之称的2017第十-届中国科学仪器发展年会（Annual Conference of China Scientific Instruments 2017...由中国仪器仪表行业协会、中国仪器仪表学会、中国仪器仪表学会分析仪器分会、仪器信息网等单位主办、素有科学仪器行业“达沃斯论坛”之称的2017第十-届中国科学仪器发展年会（Annual Conference of China Scientific Instruments 2017,简称ACCSI2017）,将于2017年4月24-25日在南京国际展览中心隆重召开.展开更多
文摘How to choose modulation frequency in the extra-high frequency geodimeter is directly related to a lot key matters such as distance sensitivity of instruments and degree of technological difficulty of modulation system. This paper analyzes and proves that choice range of modulation frequency can be from 800 MHz up to extra-high frequency with the
基金supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA0350300)the National Natural Science Foundation of China(12203105,12103091,62394351,12073008)the China Manned Space Project(CMS-CSST-2021-A12,CMS-CSST-2021-B10).
文摘The Wide Field Survey Telescope(WFST)is located at 4200 m on Saishiteng Mountain in Lenghu,Qinghai Province,China.It features a primary mirror with a diameter of 2.5 m and a camera equipped with nine CCDs,providing a wide field of view of approximately 3×3 square degrees.Calibration parameters are essential to ensure the precision of astrometric observations with the WFST.These parameters are derived from geometric distortion(GD)and gaps through astrometric modeling and are subsequently validated via the Yao’An High Precision Telescope(YAHPT).The GD solutions show maximum distortions between 1.18 and 10.29 pixels for the WFST chips,with central chips exhibiting lower distortion.After applying the GD correction,the precision of the WFST reaches 4 mas.The interchip gaps of the WFST range from 1.922 mm to 7.765 mm,corresponding to 10μm/pixel,aligning with the design and measurements.The calibrated parameters guarantee that the WFST can perform highly accurate astrometric measurements.Furthermore,as the WFST undergoes updates,the parameter model remains consistently applicable.
文摘Shaanxi Electric Power（monthly issue）is a science and technology journal which is administrated by State Grid Corporation of China,sponsored by Shaanxi Electric Power Corporation.The journal mainly reflects the new achievement,new technology,new trend in the fields ofdomestic＆international energy,electric technology.The scopeofShaanxi Electric Power covers new energy and distributed power generation,
基金Supported by the Strategic Priority Research Programme on Space Science of the Chinese Academy of Sciences(XDA04061100)
文摘Time-domain astrophysics will enter a golden era towards the end of this decade with the advent of major facilities across the electromagnetic spectrum and in the multi-messenger realms of gravitational wave and neutrino.In the soft X-ray regime,the novel micro-pore lobster-eye optics provides a promising technology to realise,for the first time,focusing X-ray optics for wide-angle monitors to achieve a good combination of sensitivity and wide field of view.In this context Einstein Probe,a soft X-ray all-sky monitor mission,was proposed and selected as a candidate mission of priority in the space science programme of the Chinese Academy of Sciences.This paper reviews the most important science developments and key questions in this field towards 2020 and beyond,and how to achieve them technologically.It also introduces the Einstein Probe mission,including its key science goals and mission definition,as well as some of the key technological issues.
文摘“2014（第八届）中国科学仪器发展年会（Annual Conference of China Scientific Instruments 2014，ACCSI 2014）”将于2014年4月18日在北京召开，将邀请相关领导、仪器公司、企业实验室、检测机构、科研院校等相关负责人出席本次年会，力争把最新的行业政策法规、最前瞻的行业市场信息、最具有代表性的仪器新产品新技术在最短时间内呈现给各位参会代表，并对2013年中国科学仪器行业发展情况进行总结，
文摘“中国科学仪器发展年会（Annual Conference of China Scientific Instruments，ACCSI）”自2006年开始已成功举办4届，目前已成为中国科学仪器行业影响力最大的高端会议之一。每年一届的“中国科学仪器发展年会”是为了促进中国科学仪器行业“政、产、学、研、用、资”等各方的有效交流，力求对中国科学仪器的新进展进行较为全面的总结，力争把新的行业政策法规、前瞻的行业市场信息、具有代表性的新技术及仪器研发新成果在短时间内呈现给各位参会代表。
文摘由中国仪器仪表行业协会、中国仪器仪表学会、中国仪器仪表学会分析仪器分会、仪器信息网等单位主办、素有科学仪器行业“达沃斯论坛”之称的2017第十-届中国科学仪器发展年会（Annual Conference of China Scientific Instruments 2017,简称ACCSI2017）,将于2017年4月24-25日在南京国际展览中心隆重召开.
