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| 1 | Comparison of Present SST Gravity Field Models显示文摘Taking the main land of Europe as the region to be studied, the potential of the new satellite gravity technique: satellite-to-satellite tracking (SST) and improving the accuracy of regional gravity field model with the SST models are investigated. The drawbacks of these models are discussed. With GPM98C as the reference, the gravity anomaly residuals of several other models, the latest SST global gravity field models (EIGEN series and GGM series), were computed and compared. The results of the comparison show that in the selected region, some systematic errors with periodical properties exist in the EIGEN and GGM’s S series models in the high degree and order. Some information that was not shown in the classic gravity models is detected in the low and middle degree and order of EIGEN and GGM’s S series models. At last, the effective maximum degrees and orders of SST models are suggested. | LUO Jia SHI Chuang ZOU Xiancai WANG Haihong | 2006 | Geo-Spatial Information Science2006，9，3： | 2 |
| 2 | Precise orbit determination for GRACE with zero-difference kinematic method显示文摘Thanks to the high performance of the spaceborne GPS receiver and the availability of precise IGS orbit and clock products,zero-difference kinematic precise orbit determination(POD) has been turned out to be a new effective method in orbit determination for the LEO satellites.Zero-difference kinematic POD,which is based on the GPS measurements only from the spaceborne GPS receiver,does not depend on the force models and orbit design.From this point of view,kinematic POD is suitable for the Earth observation satellites at very low altitudes,such as CHAMP,GRACE and GOCE,etc.This paper first reviews the basic zero-difference GPS observation model.Then a modified data quality control scheme is put forward.Finally,a block-wise least squares algorithm,which first separates the parameters into several groups and then solves the parameters by elimination and back-substitution,is discussed and proposed for the kinematic orbit determination.With the above algorithms,we developed kinematic POD software to solve the orbit suitable for one-week GRACE observations.Comparisons with the published Rapid Science Orbit(RSO) indicate that,using our approach to determine the orbit,the accuracy in the radial direction can achieve 3―4 cm for GRACE-A,and 3―5 cm for GRACE-B. | LI JianCheng ZHANG ShouJian ZOU XianCai JIANG WeiPing | 2010 | Chinese Science Bulletin2010，55，7： | 2 |
| 3 | Characterization and Genome Sequencing of a Novel Coliphage Isolated from Engineered Escherichia coli显示文摘 | Li Shu Liu Lina Zhu Junmin Zou Lingyun Li Ming Cong Yanguang Rao Xiancai Hu Xiaomei Zhou Yingbing Chen Zhijin Hu Fuquan | 2010 | Intervirology2010，，4： | 1 |
| 4 | Simulation of earth gravity field using satellite constellation with variable inclination configuration显示文摘Based on a satellite constellation composed of two GRACE-type satellite formations with different inclinations(near polar orbit + low inclination) and the theory of repeat orbit cycle, we discuss the methods for selecting medium-low inclinations for global and local gravity fields. The effects of this constellation configuration on gravity field inversion are comparatively analyzed using a whole-course dynamics simulation. The results show that compared with the single GRACE-type satellite formation,the use of satellite constellations with different inclination configurations improves the gravity solution precision by 34%. The inclusion of multi-directional observations can improve the spatio-temporal resolution of the satellite missions, and yield gravity field solutions with higher isotropic sensitivity.Furthermore, it is necessary to select the optimal low inclination according to the study area, which will have a significant influence on the gravity field solution. | Qian Zhao Weiping Jiang Xinyu Xu Xiancai Zou | 2021 | Geodesy and Geodynamics2021，12，5： | 1 |
| 5 | Feasibility study on application of satellite formations for eliminating the influence from aliasing error of ocean tide model显示文摘Currently,aliasing error of temporal signal model becomes the main factor constraining the accuracy of temporal gravity field.In provision of three types of satellite formations,i.e.,GRACE-type,Pendulum-type and n-s-Cartwheel-type,which are suitable for gravity mission and composed of observation in different directions,here we design two cases and conduct a simulation experiment on the feasibility to apply satellite formations for eliminating the influence from the aliasing error of ocean tide models.The result of our experiment shows that,when the aliasing error is disregarded,n-s-Cartwheel formation can provide the best conditions for gravity field determination,which,compared with GRACE-type,can improve the accuracy by 43%.When aliasing error of the ocean tide model acts as the main source of error,the satellite formation applied in dynamic method for gravity field inversion cannot eliminate aliasing or improve the accuracy of gravity field.And due to its higher sensitivity to the high-degree variation of gravity field,the Cartwheel-type formation,which includes the radial observation,can result in the gravity field containing more high-frequency signals for the ocean tide model error,and lead to a dramatically larger error. | ZHAO Qian JIANG WeiPing XU XinYu ZOU XianCai | 2015 | Science China Earth Sciences2015，58，3： | 1 |
| 6 | Characterization and Genome Sequencing of a Novel Coliphage Isolated from Engineered Escherichia coli显示文摘 | Li Shu Liu Lina Zhu Junmin Zou Lingyun Li Ming Cong Yanguang Rao Xiancai Hu Xiaomei Zhou Yingbing Chen Zhijin Hu Fuquan | 2010 | Intervirology2010，，4： | 1 |
| 7 | Accuracy Analysis for SST Gravity Field Model in China显示文摘Taking China as the region for test, the potential of the new satellite gravity technique, satellite-to-satellite tracking for improving the accuracy of regional gravity field model is studied. With WDM94 as reference, the gravity anomaly residuals of three models, the latest two GRACE global gravity field model (EIGEN_GRACE02S, GGM02S) and EGM96, are computed and compared. The causes for the differences among the residuals of the three models are discussed. The comparison between the residuals shows that in the selected region, EIGEN_GRACE02S or GGM02S is better than EGM96 in lower degree part (less than 110 degree). Additionally, through the analysis of the model gravity anomaly residuals, it is found that some systematic errors with periodical properties exist in the higher degree part of EIGEN and GGM models, the results can also be taken as references in the validation of the SST gravity data. | LUO Jia LUO Zhicai ZOU Xiancai WANG Haihong | 2006 | Geo-Spatial Information Science2006，9，4： | 1 |
| 8 | Accuracy Analysis of Geopotential Coefficients Recovered from In-situ Disturbing Potential by Energy Conservation Method显示文摘在恢复地球严肃模特儿(EGM ) 由创造的标准方程的特征最少平方(LS ) 从在原处扰乱的潜力的调整详细被讨论。标准方程仅仅看情况,这能被结束先验的重力模型的在轨道,和选择没在 LS 答案上有效果。因此,恢复严肃模型的精确性能精确地被模仿。从这个点开始,与噪音的不同水平沿着轨道扰乱潜力的四个集合被模仿并且被用来恢复 EGM。结果证明在加速表刻度的当前的精确性水平上, EGM 的精确性不是足够的反映地球的重力场的时间可变性,作为揭示的动态方法。 | ZOU Xiancai LI Jiancheng LUO Jia XU Xinyu | 2007 | Geo-Spatial Information Science2007，10，4： | 0 |
| 9 | Solving Three Types of Satellite Gravity Gradient Boundary Value Problems by Least-Squares显示文摘The principle and method for solving three types of satellite gravity gradient boundary value problems by least-squares are discussed in detail. Also, kernel function expressions of the least-squares solution of three geodetic boundary value problems with the observations {Γ zz },{Γ xz , Γ yz} and {Γ xx -Γ yy ,2 Γxy}are presented. From the results of recovering gravity field using simulated gravity gradient tensor data, we can draw a conclusion that satellite gravity gradient integral formulas derived from least-squares are valid and rigorous for recovering the gravity field. | XU Xinyu LI Jiancheng ZOU Xiancai CHU Yonghai | 2007 | Geo-Spatial Information Science2007，10，3： | 0 |
| 10 | Optimizing a high-sensitivity NanoLuc-based bioluminescence system for in vivo evaluation of antimicrobial treatment显示文摘Focal and systemic infections are serious threats to human health.Preclinical models enable the development of new drugs and therapeutic regimens.In vivo,animal bioluminescence(BL)imaging has been used with bacterial reporter strains to evaluate antimicrobial treatment effects.However,high-sensitivity bioluminescent systems are required because of the limited tissue penetration and low brightness of the BL signals of existing approaches.Here,we report that NanoLuc(Nluc)showed better performance than LuxCDABE in bacteria.However,the retention rate of plasmid constructs in bacteria was low.To construct stable Staphylococcus aureus reporter strains,a partner protein enolase(Eno)was identified by screening of S.aureus strain USA300 for fusion expression of Nluc-based luciferases,including Nluc,Teluc,and Antares2.Different substrates,such as hydrofurimazine(HFZ),furimazine(FUR),and diphenylterazine(DTZ),were used to optimize a stable reporter strain/substrate pair for BL imaging.S.aureus USA300/Eno-Antares2/HFZ produced the highest number of photons of orange-red light in vitro and enabled sensitive BL tracking of S.aureus in vivo,with sensitivities of approximately 10 CFU from mouse skin and 750 CFU from mouse kidneys.USA300/Eno-Antares2/HFZ was a powerful combination based on the longitudinal evaluation of the therapeutic efficacy of antibiotics.The optimized S.aureus Eno-Antares2/HFZ pair provides a technological advancement for the in vivo evaluation of antimicrobial treatment. | Weilong Shang Zhen Hu Mengyang Li Yuting Wang Yifan Rao Li Tan Juan Chen Xiaonan Huang Lu Liu He Liu Zuwen Guo Huagang Peng Yi Yang Qiwen Hu Shu Li Xiaomei Hu Jiao Zou Xiancai Rao | 2023 | mLife2023，2，4： | 0 |
| 11 | Numerical Study on the Mixed Model in the GOCE Polar Gap Problem显示文摘Gravity gradients acquired by the Gravity field and steady-state Ocean Circulation Explorer(GOCE) do not cover the entire earth because of its sun-synchronous orbit leaving data gaps with a radius of about 6.5° in the polar regions.Previous studies showed that the loss of data in the polar regions deteriorates the accuracy of the low order(or near zonal) coefficients of the earth gravity model,which is the so-called polar gap problem in geodesy.In order to find a stable solution for the earth gravity model from the GOCE gravity gradients,three models,i.e.the Gauss-Markov model,light constraint model and the mixed model,are compared and evaluated numerically with the gravity gradient simulated with the EGM2008.The comparison shows that the Best Linear Uniformly Unbiased Estimation(BLUUE) estimator of the mixed model can solve the polar gap problem as effectively as the light constraint model;furthermore,the mixed model is more rigorous in dealing with the supplementary information and leads to a better accuracy in determining the global geoid. | ZOU Xiancai CAI Jianqing Nico Sneeuw LI Jiancheng | 2011 | Geo-Spatial Information Science2011，14，3： | 0 |
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