检索结果-南通市图书馆

Precise orbit determination for TH02-02 satellites based on BDS3 and GPS observations

Chinese Journal of Aeronautics 2023年第5期36卷 475-485页

作者： Houzhe zhang Bing JU Defeng GU Ying liu Kai SHAO Xiaojun duan Zhiyong HUANG College of science National University of Defense TechnologyChangsha 410073China national Key laboratory of science and technology on Aerospace Flight Dynamics Beijing Aerospace Control CenterBeijing 100094China MOE Key laboratory of TianQin Mission TianQin Research Center for Gravitational PhysicsFrontiers Science Center for TianQinCNSA Research Center for Gravitational WavesSun Yat-sen University(Zhuhai Campus)Zhuhai 519082China School of Artificial Intelligence Sun Yat-sen University(Zhuhai Campus)Zhuhai 519082China School of Physics and Astronomy Sun Yat-sen University(Zhuhai Campus)Zhuhai 519082China information Engineering university Zhengzhou 450001China

The Tianhui-202(TH02-02)satellite formation,as a supplement to the microwave mapping satellite system Tianhui-201(TH02-01),is the first Interferometric Synthetic Aperture Radar(InSAR)satellite formation-flying system that supports the tracking of BeiDou global navigation Satellite system(BDS3)new B1C and B2a ***,the twin TH02-02 satellites also support the tracking of Global Positioning System(GPS)L1&L2 and BDS B1I&B3I *** the spaceborne receiver employs two independent boards to track the Global Navigation Satellite System(GNSS)satellites,we design an orbit determination strategy by estimating independent receiver clock offsets epoch by epoch for each GNSS to realize the multi-GNSS data fusion from different *** performance of the spaceborne receiver is evaluated and the contribution of BDS3 to the kinematic and reduced-dynamic Precise Orbit Determination(POD)of TH02-02 satellites is *** tracking data onboard shows that the average number of available BDS3 and GPS satellites are 8.7 and 9.1,*** carrier-to-noise ratio and carrier phase noise of BDS3 B1C and B2a signals are comparable to those of ***,strong azimuth-related systematic biases are recognized in the pseudorange multipath errors of B1C and *** pseudorange noise of BDS3 signals is better than that of GPS after eliminating the multipath errors from specific *** the GPS-based reduced-dynamic orbit with single-receiver ambiguity fixing technique as a reference,the results of BDS3-only and BDS3+GPS combined POD are *** Root Mean Square(RMS)of orbit comparison of BDS3-based kinematic and reduced-dynamic POD with reference orbit are better than 7 cm and 3 cm in three-Dimensional direction(3D).The POD performance based on B1C&B2a data is comparable to that based on B1I&*** precision of BDS3+GPS combined kinematic orbit can reach up to 3 cm(3D RMS),which has a more than 25%improvement relative to the GPS-only *** addi

关键词： BDS3 Multi-GNSS Precise orbit determination Spaceborne GNSS receiver TH02-02

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Charge density wave order and electron-boson coupling in ternary superconductor Bi_(2)Rh_(3)Se_(2)

引用

science china(Physics,Mechanics & Astronomy) 2023年第7期66卷 120-126页

作者： Zi-Teng liu Chen zhang Qi-Yi wu Hao liu Bo Chen Zhi-Bo Yin Sheng-Tao Cui Zhe Sun Shuang-Xing Zhu Jiao-Jiao Song Yin-Zou Zhao hong-Yi zhang Xue-Qing Ye Fan-Ying wu Shu-Yu liu Xiao-Fang Tang Ya-Hua Yuan Yun-Peng Wang Jun He Hai-Yun liu Yu-Xia duan Jian-Qiao Meng School of Physics and Electronics Central South UniversityChangsha 410083China national Synchrotron Radiation laboratory University of Science and Technology of ChinaHefei 230029China Department of Physics and Electronic science Hunan University of Science and TechnologyXiangtan 411201China beijing Academy of Quantum information sciences Beijing 100085China

The newly discovered ternary chalcogenide superconductor Bi_(2)Rh_(3)Se_(2) has attracted growing attention,which provides an opportunity to explore the interplay between charge density wave(CDW)order and ***,whether the phase transition around 240 K can be attributed to the formation of CDW remains *** help resolve the debate,we study the electronic structure of Bi_(2)Rh_(3)Se_(2) by angle-resolved photoemission spectroscopy,focusing on the nature of its high-temperature phase transition around 240 *** measurements demonstrate that the phase transition at 240 K is a second-order CDW phase *** results reveal(i)a 2×2 CDW order in Bi_(2)Rh_(3)Se_(2),accompanied by the reconstruction of electronic structure,such as band folding,band splitting,and opening of CDW gaps at and away from the Fermi level;(ii)the existence of electron-boson coupling,which is manifested as an apparent kink and peak-dip-hump structure in *** observations thus enable us to shed light on the nature of CDW order and superconductivity in Bi_(2)Rh_(3)Se_(2).

关键词： charge density wave electron-boson coupling angle-resolved photoemission spectroscopy electronic structure Chalcogenide

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Baicalin Induces IFN-α/β and IFN-γ Expressions in Cultured Mouse Pulmonary Microvascular Endothelial Cells

引用

Journal of Integrative Agriculture 2012年第4期11卷 646-654页

作者： HU Ge XUE Jiu-zhou liu Jing zhang Tao DONG hong duan Hui-qin YANG Zuo-jun REN Xiao-ming MU Xiang Animal science and technology College Beijing University of Agriculture Beijing 102206 P.R.China beijing Key laboratory of Traditional Chinese Veterinary Medicine Beijing University of Agriculture Beijing 102206 P.R.China

We studied the effect of baicalin,an extract from Radix Scutellariae（a traditional Chinese medicine） in inducing mouse pulmonary microvascular endothelial cells（MPMVECs） to produce interferons（IFNs）.MPMVECs were cultured in vitro in the presence of different concentrations of baicalin（10,20,and 30 μg mL-1）,and the cells and the culture media were harvested at various time *** proteins and mRNA levels（relative to β-actin） of IFN-α/β and IFN-γ were analyzed by RT-PCR and enzyme-linked immunosorbent assay（ELISA）.It was observed that baicalin substantially up-regulated the expression of IFN-α/β and IFN-γ.In all baicalin-treated groups,the relative levels of IFN-α/β and IFN-γ mRNAs peaked after 12 h of culturing,and IFN-α/β and IFN-γ proteins peaked after 24 h of *** results suggest that baicalin can effectively induce the expression of IFNs in pulmonary microvascular endothelial cells,and thus potentially act as an antiviral *** study may provide background information for developing new antiviral drugs based on baicalin.

关键词： baicalin pulmonary microvascular endothelial cells interferon mouse

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Record-Breaking Frequency of 44 GHz Based on the Higher Order Mode of Surface Acoustic Waves with LiNbO_(3)/SiO_(2)/SiC Heterostructures

引用

Engineering 2023年第1期20卷 112-119页

作者： Jian Zhou Dinghong zhang Yanghui liu Fengling Zhuo Lirong Qian honglang Li Yong-Qing Fu Huigao duan College of Mechanical and Vehicle Engineering Hunan UniversityChangsha 410082China Tianjin Key laboratory of Film Electronic and Communication Devices School of Integrated Circuit Science and EngineeringTianjin University of TechnologyTianjin 30084China CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China Faculty of Engineering and Environment Northumbria UniversityNewcastle upon Tyne NE18STUK

Surface acoustic wave (SAW) technology has been extensively explored for wireless communication, sensors, microfluidics, photonics, and quantum information processing. However, due to fabrication issues, the frequencies of SAW devices are typically limited to within a few gigahertz, which severely restricts their applications in 5G communication, precision sensing, photonics, and quantum control. To solve this critical problem, we propose a hybrid strategy that integrates a nanomanufacturing process (i.e., nanolithography) with a LiNbO_(3)/SiO_(2)/SiC heterostructure and successfully achieve a record-breaking frequency of about 44 GHz for SAW devices, in addition to large electromechanical coupling coefficients of up to 15.7%. We perform a theoretical analysis and identify the guided higher order wave modes generated on these slow-on-fast SAW platforms. To demonstrate the superior sensing performance of the proposed ultra-high-frequency SAW platforms, we perform micro-mass sensing and obtain an extremely high sensitivity of approximately 33151.9 MHz·mm2·μg−1, which is about 1011 times higher than that of a conventional quartz crystal microbalance (QCM) and about 4000 times higher than that of a conventional SAW device with a frequency of 978 MHz.

关键词： Ultra-high frequency SAW Higher order mode Hyper sensitive detection

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High performance ethylene sensor based on palladium-loaded tin oxide:Application in fruit quality detection

引用

Chinese Chemical Letters 2020年第8期31卷 2045-2049页

作者： Qiuni Zhao Zaihua duan Zhen Yuan Xian Li Si Wang Bohao liu Yajie zhang Yadong Jiang Huiling Tai State Key laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China(UESTC)Chengdu 610054China Agricultural information Institute Chinese Academy of Agricultural SciencesKey Laboratory of Agricultural Information Service Technology of Ministry of AgricultureBeijing 100081China

Ethylene(C2 H4),as a plant hormone,its emission can be served as an indicator to measure fruit *** to the limited physiochemical reactivity of C2 H4,it is a challenge to develop high performance C2 H4 sensors for fruit ***,this paper presents a resistive-type C2 H4 sensor based on Pd-loaded tin oxide(SnO2).The C2 H4 sensing performance of proposed sensor are tested at optimum operating temperature(250℃)with ambient relative humidity(51.9%RH).The results show that the response of Pd-loaded SnO2 sensor(11.1,Ra/Rg)is about 3 times higher than that of pristine SnO2(3.5)for 100 ppm C2 *** response time is also significantly shortened from 7 s to 1 s compared with pristine ***,the Pd-loaded SnO2 sensor possesses good sensitivity(0.58 ppm 1)at low concentration(0.05-1 ppm)with excellent linearity(R2=0.9963)and low detection limit(50 ppb).The high sensing performance of Pd-loaded SnO2 are attributed to the excellent adsorption and catalysis effects of Pd ***,the potential applications of C2 H4 sensor are performed for monitoring the maturity and freshness of fruits,which presents a promising prospect in fruit quality evaluation.

关键词： Ethylene sensing Pd-loaded SnO2 High performance Low detection limit Fruit quality monitoring

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Gene body demethylation increases expression and is associated with self-pruning during grape genome duplication

引用

Horticulture Research 2020年第1期7卷 1572-1583页

作者： Luming Zou Wenwen liu Zhan zhang Everard J.Edwards Elias Kirabi Gathunga Peige Fan Wei duan Shaohua Li Zhenchang Liang beijing Key laboratory of Grape science and Enology and CAS Key laboratory of Plant Resources Institute of BotanyChinese Academy of SciencesBeijing 100093PR China university of the Chinese Academy of sciences Beijing 100049PR China College of Life science Shanxi Normal UniversityShanxi 041004PR China CSIRO Agriculture&Food Locked Bag 2Glen OsmondSA 5064Australia Sino-Africa Joint Research Center Chinese Academy of SciencesWuhan 430074PR China

A colchicine-induced autotetraploid grapevine exhibiting potentially valuable agronomic traits for grape production and breeding,including self-pruning,was *** study investigated DNA methylation variation and its role in gene expression during self-pruning in the autotetraploid *** used RNA-Seq to estimate differentially expressed genes between diploid and autotetraploid grapevine shoot *** genes showing increases in the autotetraploid were mainly related to stress response pathways,whereas those showing decreases in the autotetraploid were related to biological metabolism and ***-genome bisulfite sequencing was performed to produce single-base methylomes for the diploid and autotetraploid *** between the methylomes revealed that they were conserved in CG and CHG *** the autotetraploid grapevine,hypodifferentially methylated regions(DMRs)and hyper-DMRs in the gene body increased or decreased gene expression,*** results indicated that a hypo-DMR in the ACO1 gene body increased its expression and might promote *** study reports that hypo-DMRs in the gene body increase gene expression in plants and reveals the mechanism underlying the changes in the modifications affecting gene expression during genome ***,our results provide valuable information for understanding the relationships between DNA methylation,gene expression,and autotetraploid breeding in grape.

关键词： metabolism breeding showing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of Shuanghuanglian oral liquids on patients with COVID-19:a randomized,open-label,parallel-controlled,multicenter clinical trial

引用

Frontiers of Medicine 2021年第5期15卷 704-717页

作者： Li Ni Zheng Wen Xiaowen Hu Wei Tang Haisheng Wang Ling Zhou Lujin wu hong Wang Chang Xu Xizhen Xu Zhichao Xiao Zongzhe Li Chene Li Yujian liu Jialin duan Chen Chen Dan Li Runhua zhang Jinliang Li Yongxiang Yi Wei Huang Yanyan Chen Jianping Zhao Jianping Zuo Jianping Weng Hualiang Jiang Dao Wen Wang Division of Cardiology Department of Internal Medicine and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological DisordersTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China The First Affiliated Hospital of university of science and technology of china Hefei 230026China State Key laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China Harbin Pharmaceutical Group Co. Ltd.Harbin 150070China The Sixth Hospital of Harbin Harbin 150036China The Second Hospital of Nanjing and the Affiliated Hospital of Nanjing university of Chinese Medicine Nanjing 210003China Department of Cardiology Chinese People’s Liberation Army Central War Command General HospitalWuhan 430010China Department of information Management Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Division of Respiratory Department of Internal MedicineTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Shanghai Institute for Advanced Immunochemical Studies and School of Life science and technology ShanghaiTech UniversityShanghai 201210China

We conducted a randomized,open-label,parallel-controlled,multicenter trial on the use of Shuanghuanglian(SHL),a traditional Chinese patent medicine,in treating cases of COVID-19.A total of 176 patients received SHL by three doses(56 in low dose,61 in middle dose,and 59 in high dose)in addition to standard *** control group was composed of 59 patients who received standard therapy *** with SHL was not associated with a difference from standard care in the time to disease *** with 14-day SHL treatment had significantly higher rate in negative conversion of SARS-CoV-2 in nucleic acid swab tests than the patients from the control group(93.4%vs.73.9%,P=0.006).Analysis of chest computed tomography images showed that treatment with high-dose SHL significantly promoted absorption of inflammatory focus of pneumonia,which was evaluated by density reduction of inflammatory focus from baseline,at day 7(mean difference(95%CI),−46.39(−86.83 to−5.94)HU;P=0.025)and day 14(mean difference(95%CI),−74.21(−133.35 to−15.08)HU;P=0.014).No serious adverse events occurred in the SHL *** study illustrated that SHL in combination with standard care was safe and partially effective for the treatment of COVID-19.

关键词： COVID-19 SARS-CoV-2 Shuanghuanglian oral liquid clinical trial

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Growth, characterization, and Raman spectra of the 1T phases of TiTe_(2), TiSe_(2), and TiS_(2)

引用

Chinese Physics B 2022年第3期31卷 482-487页

作者： Xiao-Fang Tang Shuang-Xing Zhu Hao liu Chen zhang Qi-Yi wu Zi-Teng liu Jiao-Jiao Song Xiao Guo Yong-Song Wang He Ma Yin-Zou Zhao Fan-Ying wu Shu-Yu liu Kai-Hui liu Ya-Hua Yuan Han Huang Jun He Wen Xu Hai-Yun liu Yu-Xia duan Jian-Qiao Meng Key laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of sciences Hefei 230031China university of science and technology of china Hefei 230026China School of Physics and Electronics Central South university Changsha 410083China State Key laboratory for Mesoscopic Physics Collaborative Innovation Center of Quantum Matter School of Physics Peking UniversityBeijing 100871China beijing Academy of Quantum information sciences Beijig 10085China

High-quality large 1T phase of TiX_(2)(X = Te, Se, and S) single crystals have been grown by chemical vapor transport using iodine as a transport agent. The samples are characterized by compositional and structural analyses, and their properties are investigated by Raman spectroscopy. Several phonon modes have been observed, including the widely reported A_(1g) and E_(8) modes, the rarely reported E_(u) mode(-83 cm^(-1) for TiTe_(2), and -185 cm^(-1)for TiS_(2)), and even the unexpected K mode(-85 cm^(-1)) of TiTe_(2). Most phonons harden with the decrease of temperature, except that the K mode of TiTe_(2) and the E_(u) and “A_(2u)/Sh” modes of TiS_(2) soften with the decrease of temperature. In addition, we also found phonon changes in TiSe_(2) that may be related to charge density wave phase transition. Our results on TiX_(2) phonons will help to understand their charge density wave and superconductivity.

关键词： transition-metal dichalcogenides chemical vapor transport Raman phonon

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental Realization of an Intrinsic Magnetic Topological Insulator

引用

Chinese Physics Letters 2019年第7期36卷 66-71页

作者： Yan Gong Jingwen Guo Jiaheng Li Kejing Zhu Menghan Liao Xiaozhi liu Qinghua zhang Lin Gu Lin Tang Xiao Feng Ding zhang Wei Li Canli Song Lili Wang Pu Yu Xi Chen Yayu Wang hong Yao Wenhui duan Yong Xu Shou-Cheng zhang Xucun Ma Qi-Kun Xue Ke He State Key laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing 100084 2beijing national laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 beijing Academy of Quantum information sciences Beijing 100193 Collaborative Innovation Center of Quantum Matter Beijing 100084 Institute for Advanced Study Tsinghua University Beijing 100084 RIKEN Center for Emergent Matter science (CEMS) Wako Saitama 351-0198 Japan Stanford Center for Topological Quantum Physics Department of Physics Stanford University Stanford California 94305-4045 USA

An intrinsic magnetic topological insulator(TI) is a stoichiometric magnetic compound possessing both inherent magnetic order and topological electronic states. Such a material can provide a shortcut to various novel topological quantum effects but remained elusive experimentally for a long time. Here we report the experimental realization of thin films of an intrinsic magnetic TI, MnBi2Te4, by alternate growth of a Bi2Te3 quintuple layer and a MnTe bilayer with molecular beam epitaxy. The material shows the archetypical Dirac surface states in angle-resolved photoemission spectroscopy and is demonstrated to be an antiferromagnetic topological insulator with ferromagnetic surfaces by magnetic and transport measurements as well as first-principles calculations. The unique magnetic and topological electronic structures and their interplays enable the material to embody rich quantum phases such as quantum anomalous Hall insulators and axion insulators at higher temperature and in a well-controlled way.

关键词： intrinsic magnetic stoichiometric magnetic well-controlled way

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Time-Resolved Study of Pseudogap and Superconducting Quasiparticle Dynamics in Ca0.82La0.18Fe1-xNixAs2

引用

Chinese Physics Letters 2020年第6期37卷 86-89页

作者： Cong-Ying Jiang Hai-Ying Song T.Xie C.liu H.Q.Luo S.Z.Zhao Xiu zhang X.C.Nie Jian-Qiao Meng Yu-Xia duan H.Y.liu Shi-Bing liu Strong-Field and Ultrafast Photonics Lab Beijing Engineering Research Center of Laser TechnologyInstitute of Laser EngineeringBeijing University of TechnologyBeijing 100124China beijing national laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical sciences University of Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials laboratory Dongguan 523808China School of Physics and Electronics Central South UniversityChangsha 410083China beijing Academy of Quantum information sciences Beijing 100193China

We use femtosecond time-resolved optical reflectivity to study the photoexcited quasiparticle(QP)dynamics in the iron-based 112 type superconducting(SC)samples Ca0.82La0.18Fe1-xNixAs2,with x=0 and *** the parent sample,a fast and a slow relaxation emerge at temperatures below the magnetic-structure(MS)transition Tms≈50 K and the SC transition Tc≈33 K,*** latter obviously corresponds to an SC QP dynamics,which is further confirmed in the x=0.024 sample with Tc≈25 *** former suggests that a partial of photoexcited QP relaxation through a pesudogap(PG)channel,which is absent in the doped x=0.024 sample without the MS transition.

关键词： transition. relaxation excited

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：