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| 1 | A new global zenith tropospheric delay model IGGtrop for GNSS applications显示文摘Tropospheric delay is one of the main sources of measurement error in global navigation satellite systems.It is usually compensated by using an empirical correction model.In this paper,temporal and spatial variations of the global zenith tropospheric delay(ZTD) are further analyzed by ZTD time series from global International GNSS Service stations and annual ZTDs derived from global National Centers for Environmental Prediction reanalysis data,respectively.A new ZTD correction model,named IGGtrop,is developed based on the characteristics of ZTD.Experimental results show that this new 3D-grid-based model that accommodates longitudinal as well as latitudinal variations of ZTD performs better than latitude-only based models(such as UNB3,EGNOS,and UNB3m).The global average bias and RMS for IGGtrop are about-0.8 cm and 4.0 cm,respectively.Bias values for UNB3,EGNOS,and UNB3m are 2.0,2.0,and 0.7 cm,respectively,and respective RMS values 5.4,5.4,and 5.0 cm.IGGtrop shows much more consistent prediction errors for different areas than EGNOS and UNB3m,In China,the performance of IGGtrop(bias values from-2.0 to 0.4 cm and RMS from 2.1 to 6.4 cm) is clearly superior to those of EGNOS and UNB3m.It is also demonstrated that IGGtrop biases vary little with height,and its RMS values tend to decrease with increasing height.In addition,IGGtrop generally estimates ZTD with greater accuracy than EGNOS and UNB3m in the Southern Hemisphere. | LI Wei YUAN YunBin OU JiKun LI Hui LI ZiShen | 2012 | Chinese Science Bulletin2012，57，17： | 32 |
| 2 | Models and methods for precise determination of ionospheric delay using GPS显示文摘为精确在 GPS 观察决定 ionospheric 延期的基本原则和方法是 intorduced 并且讨论。为基于 GPS 适合 ionospheric delyas 的各种各样的方法和模型被比较并且分析,并且到研究和工程的方法和模型的应用被总结。 | YUAN Yunbin HUO Xingliang OU Jikun | 2007 | Progress in Natural Science:Materials International2007，17，2： | 25 |
| 3 | Preliminary results and analyses of using IGS GPS data to determine global ionospheric TEC显示文摘Using the spherical harmonic (SH) function model and the dual frequency GPS data of 139 International GPS Service (IGS) stations for July 15 of 2000, the global ionospheric total electron content (TEC) is calculated and the basic method is investigated. Here, preliminary results are reported and the problems and difficulties to be solved for using GPS data to determine the global ionospheric TEC are discussed. | YUAN Yunbin and OU Jikun(Laboratory of Dynamic Geodesy, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China) | 2003 | Progress in Natural Science:Materials International2003，13，6： | 20 |
| 4 | Extraction of line-of-sight ionospheric observables from GPS data using precise point positioning显示文摘Here we propose a method for extracting line-of-sight ionospheric observables from GPS data using precise point positioning(PPP).The PPP-derived ionospheric observables(PIOs) have identical form with their counterparts obtained from leveling the geometry-free GPS carrier-phase to code(leveling ionospheric observables,LIOs),and are affected by the satellite and receiver inter-frequency biases(IFBs).Based on the co-location experiments,the effects of extracting error arising from the observational noise and multipath on the PIOs and the LIOs are comparatively assessed,and the considerably reduced effects ranging from 70% to 75% on the PIOs with respect to the LIOs can be verified in our case.In addition,based on 26 consecutive days' GPS observations from two international GNSS service(IGS) sites(COCO,DAEJ) during disturbed ionosphere period,the extracted PIOs and LIOs are respectively used as the input of single-layer ionospheric model to retrieve daily satellite IFBs station-by-station.The minor extracting errors underlying the PIOs in contrast to the LIOs can also be proven by reducing day-to-day scatter and improving between-receiver consistency in the retrieved satellite IFBs values. | ZHANG BaoCheng OU JiKun YUAN YunBin LI ZiShen | 2012 | Science China Earth Sciences2012，55，11： | 19 |
| 5 | Model analysis method (MAM) on the effect of the second-order ionospheric delay on GPS positioning solution显示文摘In this paper,we develop an approach to study the effect of second-order ionospheric delay on GPS positioning based on the ionosphere-free combination (abbreviated to Lc) of GPS dual-frequency carrier phase observables,in which the first-order ionospheric delay has been eliminated.GPS data from IGS WUHN tracking station during April 9 23,2003 is used to perform the above approach,and results show that the second-order ionospheric delay in GPS so-called ionosphere-free observables will result in the regular southward shift of GPS positioning solution.Additionally,the influence of the Earth's magnetic field on second-order ionospheric delay over the Wuhan area is discussed,and it indicates that the Earth's magnetic field is one of the main factors why second-order ionospheric delay results in the regular southward shift of GPS positioning solution over Wuhan area. | LIU XiFeng YUAN YunBin HUO XingLiang LI ZiShen LI Wei | 2010 | Chinese Science Bulletin2010，55，15： | 15 |
| 6 | Effects of minor Sc on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr based alloys显示文摘Five kinds of Al-Zn-Mg-Cu-Zr based alloys with different Sc additions were prepared by ingot metallurgy. The effects of minor Sc on the microstructure and mechanical properties of Al-Zn-Mg-Cu-Zr based alloys were investigated using tensile tests, optical microscopy (OM), and transmission electron microscopy (TEM). The results show that the ultimate tensile strength and yield strength are improved by 94 and 110 MPa, respectively, and the elongation to failure remains at a reasonable extent (11.1%) in the Al-Zn-Mg-Cu-Zr based alloy with 0.21 wt.% Sc addition after solution heat treatment at 475°C for 40 min and then aged at 120°C for 24 h. The addition of minor Sc induces the formation of Al3(Sc,Zr) particles, which are highly effective in refining the cast microstructures, retarding recrystallization, and pinning dislocations. The increment of strength is attributed mainly to fine grain strengthening, precipitation strengthening of Al3(Sc,Zr) particles, and substructure strengthening. | LI Wenbin PAN Qinglin ZOU Liang LIANG Wenjie HE Yunbin LIU Junsheng | 2009 | Rare Metals2009，28，1： | 12 |
| 7 | Yaw attitude of eclipsing GPS satellites and its impact on solutions from precise point positioning显示文摘During the period when a GPS satellite,the Earth and the Sun are approximately collinear,the phenomenon of eclipsing the satellite occurs,when the satellite yaw attitude deviates from its nominal case,i.e. the body X-axis cannot point towards the Sun for Block II&IIA or away from it for Block IIR satellites. The yaw attitude of the eclipsing satellites has a significant influence on both the satellite clock estimation at each International GNSS Service (IGS) Analysis Center (AC) and for users of the precise point positioning (PPP) implementations. It is known that,during the eclipsing periods,inconsistent yaw attitude models among the ACs will contribute to the errors of the IGS combined clock products. As for the PPP user,the influence of the eclipsing satellite is two-fold. First,as the satellite clocks are always kept fixed during PPP implementation,the above-mentioned problematic IGS clocks will inevitably be passed on to the PPP estimates. Second,the improper yaw attitude modeling of the eclipsing satellite will cause a correction bias exceeding 1 dm for the two kinds of attitude-related systematic errors,namely the phase wind-up and satellite antenna phase center offset,which will further deteriorate the accuracy of the PPP solutions. A yaw attitude model is introduced in this paper with the aim of improving the reliability of PPP solutions during the satellite eclipsing period. | ZHANG BaoCheng OU JiKun YUAN YunBin ZHONG ShiMing | 2010 | Chinese Science Bulletin2010，55，32： | 8 |
| 8 | Initial assessment of single-and dual-frequency BDS-3 RTK positioning显示文摘The BeiDou navigation satellite system with global coverage(BDS-3)has been fully operational since July 2020 and provides comprehensive services to global users.BDS-3 transmits several new navigational signals based on the signals inherited from the BeiDou navigation satellite(regional)system(BDS-2).Previous studies focused on the positioning performance of BDS-2 plus BDS-3 and that of combining BDS-3 and other Global Navigation Satellite Systems(GNSSs),but there was no in-depth discussion on the positioning performance of the BDS-3-only.In this contribution,the BDS-3-only Real-Time Kinematic(RTK)positioning is analysed using the data collected in zero and short baselines in Wuhan,China.The RTK model based on Single-Differenced is first presented,and the BDS-3-only RTK positioning in cases of single and dual-frequencies is evaluated with the model in terms of the empirical integer ambiguity resolution success rates and positioning accuracy.Our numerical tests suggest two major findings.First,the positioning performance for the B1I and B3I retained from BDS-2 and the new frequency B1C is comparable,while that for the new frequency B2a is poorer.Second,the positioning performance of the new frequency combination of the B1C+B2a is not as good as that of the B1C only,owing to the unrealistic stochastic model used. | Yunbin Yuan Xiaolong Mi Baocheng Zhang | 2020 | Satellite Navigation2020，1，1： | 7 |
| 9 | Effect of aging on the mechanical properties and corrosion susceptibility of an Al-Cu-Li-Zr alloy containing Sc显示文摘Al-3.5Cu-1.5Li-0.22 (Sc+Zr ) 合金的微观结构,机械性质, intergranular 腐蚀,和脱落腐蚀上的老化的效果被调查了。结果证明合金有年龄变硬,和降水的主要阶段的特性,加强是 T1 阶段。变老的温度和老化时间在 T1 阶段的数量和分发上有重要效果。合金的合适的人工的单个老化的处理在 160r_ | LIANG Wenjie PAN Qinglin HE Yunbin LI Yunchun ZHOU Yingchun LU Congge | 2008 | Rare Metals2008，27，2： | 7 |
| 10 | Hydrogen isotope geochemistry of lherzolitic shergottite in Martian meteorite GRV99027 from the Grove Mountains in Antarctica显示文摘Hydrogen isotopic composition was measured using an ion microprobe for lherzolitic shergottite in Martian meteorite GRV 99027 from the Grove Mountains in Antarctica. The D/H ratios of phosphate whitlockites were analyzed and water concentrations of tested points were calculated. The result show that their δ D values vary from +1300‰ to +4700‰, and water contents from 0.04 wt% to 0.43 wt%. Comparing the results with the hydrogen isotopic compositions of whole rock, hydrous miner- als and phosphates in SNC meteorites indicates that water highly enriched in deuterium is a unique feature of Martian meteorites, especially the phosphates prominent. It is interpreted as the result of isotopic exchange between magmatic water and Martian crustal fluids. The high D/H ratios observed in GRV 99027 phosphates indicate that they have hydrogen isotopic compositions similar to those of apatite in other Martian meteorites. The results further con- firmed the association of GRV 99027 with the Martian meteorite group. | WANG Henian HSU Weibiao GUAN Yunbin LIANG Ying | 2006 | Chinese Science Bulletin2006，51，16： | 5 |
| 11 | Monitoring the ionosphere based on the Crustal Movement Observation Network of China显示文摘The Global Navigation Satellite System(GNSS) is becoming important for monitoring the variations in the earth's ionosphere based on the total electron content(TEC) and ionospheric electron density(IED). The Crustal Movement Observation Network of China(CMONOC), which includes GNSS stations across China's Mainland, enables the continuous monitoring of the ionosphere over China as accurately as possible. A series of approaches for GNSS-based ionospheric remote sensing and software has been proposed and developed by the Institute of Geodesy and Geophysics(IGG) in Wuhan. Related achievements include the retrieval of ionospheric observables from raw GNSS data, differential code biases estimations in satellites and receivers, models of local and regional ionospheric TEC,and algorithms of ionospheric tomography. Based on these achievements, a software for processing GNSS data to determine the variations in ionospheric TEC and IED over China has been designed and developed by IGG. This software has also been installed at the CMONOC data centers belonging to the China Earthquake Administration and China Meteorological Administration. This paper briefly introduces the related research achievements and indicates potential directions of future work. | Yuan Yunbin Li Zishen Wang Ningbo Zhang Baocheng Li Hui Li Min Huo Xingliang Ou Jikun | 2015 | Geodesy and Geodynamics2015，6，2： | 5 |
| 12 | In situ SIMS oxygen isotope analyses: Evidence for the formation of aluminum-rich chondrules from ordinary chondrites显示文摘Aluminum-rich chondrules(ARCs),which share mineralogic and chemical properties with both Ca,Al-rich inclusions(CAIs)and ferromagnesian chondrules,play an important role in revealing their temporal and petrogenetic relationships.In this work,seven ARCs were found in three ordinary chondrites GRV 022410(H4),GRV 052722(H3.7)and Julesburg(L3.6).They contain bulk Al2O3~17%-33%and exhibit igneous textures composed of olivine,high-and low-Ca pyroxene,plagioclase,spinel and glass.In situ SIMS analyses show that ARCs have oxygen isotopic compositions(δ18O=–6.1‰–7.1‰;δ17O=–4.5‰–5.1‰)close to ferromagnesian chondrules but far more depleted in 16O than CAIs(δ18O=-40‰;δ17O=-40‰).Most ARCs plot close to the terrestrial mass fractionation(TF)line,and a few between the TF and carbonaceous chondrite anhydrous mixing(CCAM)lines.Plagioclase,nepheline and glass suffered O-isotopic exchanges during the metamorphism processes in the parent body.Spinel,olivine and pyroxene represent the primary O-isotopic compositions of ARCs,and define a fitted line with a slope of^0.7±0.1.Compared with the results of previous studies,shallower slope as well as more depleted16O compositions further demonstrates that ARCs in ordinary chondrites are not a simple mixing product of ferromagnesian chondrules and CAIs.Instead,they probably experienced higher-degree oxygen isotope exchange with a 16O-poor nebular gas reservoir during multiple melting episodes. | JIANG Yun HSU WeiBiao GUAN YunBin WANG Ying | 2015 | Science China Earth Sciences2015，58，10： | 4 |
| 13 | Optimal carrier-smoothed-code algorithm for dual-frequency GPS data显示文摘Carrier-smoothed-code (CSC) algorithm is an e ective pseudorange multipath mitigation technique, which can alleviate the compu- tational burden and reduce the communication bandwidth needed for the transmission of GPS observations. This paper presents an improved Hatch lter and addresses the optimal CSC algorithm for dual-frequency GPS data based on the optimal parameter estimation theory. The smoothed observations have the same information content as that of the raw dual-frequency GPS data from which these are derived. Consequently, the optimal CSC algorithm is equivalent to the uncombined algorithm. Theoretical analyses show that the data precision of the optimal CSC algorithm is better than that of Hatch lter and its improved version. | Jianfeng Guo Jikun Ou Yunbin Yuan Haitao Wang | 2008 | Progress in Natural Science:Materials International2008，18，5： | 4 |
| 14 | β-catenin activation in hair follicle dermal stem cells in duces ectopic hair outgrowth and skin fibrosis显示文摘Hair follicle dermal sheath(DS)harbors hair follicle dermal stem cells(hfDSCs),which can be recruited to replenish DS and dermal papilla(DP).Cultured DS cells can differentiate into various cell lineages in vitro.However,it is unclear how its plasticity is modulated in vivo.Wnt/β-catenin signaling plays an important role in maintaining stem cells of various lineages and is required for HF development and regeneration.Here we report that activation ofβ-catenin in DS generates ectopic HF outgrowth(EF)by reprogramming HF epidermal cells and DS cells themselves,and endows DS cells with hair inducing ability.Epidermal homeostasis of pre-existing HFs is disrupted.Additionally,cell-autonomous progressive skin fibrosis is prominent in dermis,where the excessive fibroblasts largely originate from DS.Gene expression analysis of purified DS cells with activatedβ-catenin revealed significantly increased expression of Bmp,Fgf,and Notch ligands and administration of Bmp,Fgf,or Notch signaling inhibitor attenuates EF formation.In summary,our findings advance the current knowledge of high plasticity of DS cells and provide an insight into understanding how Wnt/β-catenin signaling controls DS cell behaviors. | Yixin Tao Qingchun Yang Lei Wang Jie Zhang Xuming Zhu Qianqian Sun Yunbin Han Qian Luo Yushu Wang Xizhi Guo Ji Wu Baojie Li Xiao Yang Lin He Gang Ma | 2019 | Journal of Molecular Cell Biology2019，11，1： | 4 |
| 15 | Identification and expression of GABAC receptor in rat testis and spermatozoa显示文摘我们的以前的研究显示出那 γ-aminobutyric 酸(伽马氨基丁酸) 和伽马氨基丁酸 B 受体涉及孕酮或伽马氨基丁酸导致的老鼠精子 acrosome 反应。这里,我们报导伽马氨基丁酸 在老鼠睾丸和精子的 C 受体。编码 ρ1, ρ2 和伽马氨基丁酸 C 受体从老鼠睾丸被克隆;他们的序列与老鼠伽马氨基丁酸 在视网膜的 C 受体。反向的抄写聚合酶链反应分析证明在老鼠睾丸的开发期间, ρ1 和 ρ2 子单元的抄本层次显示出小变化,当 ρ3 的表达式是逐渐地起来调整的时。用 anti-ρl 抗体的 Immunofluorescence 分析揭示了那伽马氨基丁酸 C 受体在伸长的 spermatid 和精子上存在。用金霉素试金,我们发现那 N (4 )-chloroacetylcytosine arabinoside,伽马氨基丁酸 C 受体收缩筋,触发的老鼠精子 acrosome 反应;而(1,2,5,6-tetrahydropyridin-4-yl ) methylphosphinic 酸,伽马氨基丁酸 C 受体对手,禁止了 N (4 )-chloroacetylcytosine arabinoside 的能力导致 acrosome 反应。这些结果建议了那伽马氨基丁酸 C 受体也涉及老鼠精子 acrosome 反应。 | Shifeng Li Yunbin Zhang Haixiong Liu Yuanchang Yan Yiping Li | 2008 | Acta Biochimica et Biophysica Sinica2008，40，8： | 4 |
| 16 | RAPID NONDESTRUCTIVE TESTING OF HEAT-TREATMENT QUALITY OF 2014 ALUMINIUM ALLOY显示文摘1INTRODUCTIONSincethepaper“Rapid,NondestructiveAndQuantitativeTestingofHardnesofAluminiumaloys”waspublished[1],manyreadersha... | Fan, Jingyun Wan, Jing He, Yunbin Wan, Guoqing | 1999 | 中国有色金属学会会刊:英文版1999，9，1： | 4 |
| 17 | Randomized,multicenter,open-label trial of autologous cytokine-induced killer cell immunotherapy plus chemotherapy for squamous non-small-cell lung cancer:NCT01631357显示文摘Dear Editor,Cytokine-induced killer(CIK)cells have been recognized as a new type of anti-tumor effector cells.CIK cells are a mixture of T lymphocytes.Among them,CD3+/CD56+T cells,which are rare in uncultured peripheral blood,are the main effector cells.CIK cells can proliferate rapidly in vitro,with stronger antitumor activity,broader target tumor spectrum,and lower adverse effect than other reported antitumor effector cells.1 Their ease of production in vitro and antitumor potential have made them suitable candidates for cell therapy regimens in solid and hematopoietic tumor treatments.1,2 Our previous retrospective study showed that the median progression-free survival(PFS)and overall survival(OS)in untreated,advanced non-small-cell lung cancer(NSCLC)patients who received CIK cell immunotherapy plus chemotherapy(13 and 24 months,respectively)were significantly longer than in those who received chemotherapy alone(6 and 10 months,respectively).2 But so far,there is no prospective,multicenter clinical study in lung cancer.Based on our previous study,we designed this randomized,multicenter,open-label trial to further evaluate the clinical efficacy of CIK cell immunotherapy plus chemotherapy in patients with advanced squamous NSCLC(ClinicalTrials.gov number,NCT01631357). | Liang Liu Quanli Gao Jingting Jiang Junping Zhang Xin Song Jiuwei Cui Yunbin Ye Zhiyu Wang Xinwei Zhang Xiubao Ren | 2020 | Signal Transduction and Targeted Therapy2020，5，1： | 2 |
| 18 | 普通球粒陨石中富铝球粒的成因:离子探针氧同位素证据显示文摘富铝球粒(ARC)在岩矿学和同位素组成等方面兼具富钙富铝难熔包体(CAI)和镁铁质球粒的特征,可以揭示其成因及时空关系因而成为天体化学重要的研究对象之一.本文研究了3个普通球粒陨石(GRV 022410(H4),GRV 052722(H3.7)和Julesburg(L3.6))中发现的7个富铝球粒.详细的岩相学和矿物学研究表明,这些富铝球粒的全岩Al2O3含量为17%-33%,均显示火成结构,主要由橄榄石、高钙和低钙辉石、长石、尖晶石和玻璃组成.离子探针原位分析显示,富铝球粒组成相的氧同位素成分(δ^18O=–6.1‰-7.1‰;δ^17O=–4.5‰-5.1‰)与镁铁质球粒相近,远比CAI(δ^18O=-40‰;δ^17O=-40‰)亏损16O.在三氧同位素图上,大部分富铝球粒投在地球分异(TF)线附近,少部分(含尖晶石)投在TF线和碳质球粒陨石无水矿物(CCAM)线之间.长石、霞石及玻璃的氧同位素成分是母体变质过程中氧同位素交换的结果.尖晶石、橄榄石及辉石的氧同位素成分代表了原始的富铝球粒的氧同位素组成,这些数据拟合线的斜率为0.7±0.1.与前人研究结果相比,更缓的斜率及更贫^16O的成分进一步表明普通球粒陨石中的富铝球粒不是CAI与镁铁质球粒简单混合形成的.相反,他们很有可能在多次熔融过程中与贫16O的星云气体储库经历了更高程度的氧同位素交换. | 蒋云 徐伟彪 GUAN YunBin 王英 | 2015 | 中国科学:地球科学2015，45，9： | 2 |
| 19 | EnAli:entity alignment across multiple heterogeneous data sources显示文摘Entity alignment is the problem of identifying which entities in a data source refer to the same real-world entity in the others.Identifying entities across heterogeneous data sources is paramount to many research fields,such as data cleaning,data integration,.information retrieval and machine learning.The aligning process is not only overwhelmingly expensive for large data sources since it involves all tuples from two or more data sources,but also need to handle heterogeneous entity attributes.In this paper,we propose an unsupervised approach,called EnAli,to match entities across two or more heterogeneous data sources.EnAli employs a generative probabilistic model to incorporate the heterogeneous entity attributes via employing exponential family,handle missing values,and also utilize the locality sensitive hashing schema to reduce the candidate tuples and speed up the aligning process.EnAli is highly accurate and efficient even without any ground-truth tuples.We illustrate the performance of EnAli on re-identifying entities from the same data source,as well as aligning entities across three real data sources.Our experimental results manifest that our proposed approach outperforms the comparable baseline. | Chao KONG Ming GAO Chen XU Yunbin FU Weining QIAN Aoying ZHOU | 2019 | Frontiers of Computer Science2019，13，1： | 2 |
| 20 | Preparation and Anti-ultraviolet Aging Performance of Organic Layered Double Hydroxides/Bitumen Composites显示文摘Layered double hydroxides(LDHs) with the physical property of high ultraviolet(UV)reflectance were used to enhance the anti-UV aging performance of bitumen. In view of the poor compatibility of LDHs with bitumen, three organic anions, namely, sodium dodecyl benzenesulfonate(SDBS), sodium dodecyl sulfate(SDS) and sodium dodecyl sulfonate(SDSO), were used as modifiers to prepare organic LDHs(OCLDHs) through regeneration process, and the crystal structure, chemical composition, morphological feature and UV shielding capability of synthesized OCLDHs were analyzed. Then the OCLDHs were added into bitumen to evaluate the storage stability and anti-UV aging property of OCLDHs/bitumen composites.The results show that the organic anions are inserted into the interlayers of LDHs, the intercalation expands the interlayer distance of LDHs, makes the particle shapes become more irregular and complicated, and enhances the absorption ability within the range from 200 to 300 nm while has little influence on the UV reflection ability.Result of high temperature storage stability indicates the organic modification ameliorates the compatibility of LDHs with bitumen. Compared with LDHs, OCLDHs decrease the deteriorations of bitumen’s properties during UV exposure test, exhibiting better effect in enhancing anti-UV aging performance of bitumen. Furthermore,among the three OCLDHs, LDHs intercalated by SDBS exhibit the most effective improvement due to the best compatibility with bitumen and comparatively good UV shielding effect. | 徐松 YU Jianying KE Yunbin XUE Lihui HU Changbin | 2019 | Journal of Wuhan University of Technology(Materials Science)2019，34，4： | 2 |
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