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Simplified ultra-tightly coupled BDS/INS integrated navigation system

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Science China(Information Sciences) 2016年第11期59卷 154-169页

作者： Kanghua TANG bing luo Xiaofeng HE College of Mechatronics and Automation National University of Defense Technology

Due to advantages such as low cost, small size, low weight, low power consumption, powerful capability of anti-jamming, and high dynamics, ultra-tightly coupled GNSS/MIMU integrated navigation systems are extensively used in projectile and precision-guided munitions. To overcome the nonlinearity of baseband signal processing and the complexity of the navigation filter, in this paper, we design a novel architecture for the ultra-tightly coupled(UTC) Beidou navigation satellite system(BDS)/INS integration based on the BDS B3 signal, including the combination of code phase and carrier phase dynamics baseband prefilter model, and the navigation filter navigation error propagation and measurement models. To eliminate the clock state components, i.e., the receiver clock offset and clock drift, the pseudorange, delta pseudorange, and delta pseudorange rate residuals obtained from baseband signal prefilters are differenced between two satellites. Based on the BDS/INS simulator, a test system for the UTC BDS/INS integrated navigation system is developed and UTC performance is evaluated. Some preliminary conclusions are formed about the effectiveness of the UTC BDS/INS integration approach.

关键词： BDS/INS ultra-tightly coupled integrated navigation system baseband signal preprocessing high dynamics BDS/INS simulator

Effect of Wave Headings on the Dynamic Response of the Continuous Mating Operation of Floatover Installation

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China Ocean Engineering 2021年第1期35卷 72-83页

作者： BAI Xiao-dong luo Han-bing XIE Peng State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Department of Naval Architecture and Ocean Engineering Tianjin UniversityTianjin 300072China

The topside floatover installation is always a great challenge and is sensitive to environmental *** this study,experimental analysis on the mating operation of the floatover installation in different wave headings is *** continuous mating operation using the rapid transfer technique was experimentally simulated with the assistance of the jacking system and the ballast *** the continuous transfer modeling,the topsides loads were transferred onto the jacket by several consecutive steps,including the first rapid jack-down for the 30%loads,continuous 30%−70%load transfer and the second repaid jack-down for the remaining 30%*** of the barge and the topsides as well as loads on the Deck Support Unite(DSU)and the Leg Mating Unite(LMU)in different wave headings were *** results illustrated the complex motion behavior and load characteristics of the continuous transfer *** indicate that the rapid jack-down operations will lead to impact loads and larger lateral DSU *** bow quartering seas are much more dangerous as it gives rise to the larger motions and *** with the traditional steady-state modeling indicate that the continuous transfer modeling has greater advantages over the steady-state modeling on predicting the loads.

关键词： floatover installation rapid transfer technique model test different wave directions

Quantum Teleportation between Two Distant Bose-Einstein Condensates

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Chinese Physics Letters 2012年第6期29卷 24-27页

作者： GUO Yu luo Xiao-bing Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190 School of Physics and Electronic Science Changsha University of Science and TechnologyChangsha 410114 Department of Physics Jinggangshan UniversityJi’an 343009

We propose protocols for quantum teleportation of superposed coherent states of atomic Bose-Einstein *** use the photon entanglement states as the quantum channel,which makes it possible to realize the distant teleportation of atomic *** robust protocols are introduced:one is a single-photon scheme in which an entangled single-photon state serves as the quantum channel,and the other is a multi-photon scheme where an entangled coherent state of the probe lasers is used as the quantum channel.

关键词： quantum Einstein coherent

Regioselective Oxidation of Phenols to o-Quinones with Dess-Martin Periodinane(DMP)

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Chinese Chemical Letters 2003年第6期14卷 555-556页

作者： Hui bing luo Yu Yuan XIE State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaShanghai Institutes for Biological SciencesShanghai 200031

Regioselective oxidation of phenols to o-quinones with Dess-Martin periodinane is reported.

关键词： Phenol o-quinone Dess-Martin periodinane.

Jet Vectoring Control Using a Novel Synthetic Jet Actuator

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Chinese Journal of Aeronautics 2007年第3期20卷 193-201页

作者： luo Zhen-bing XIA Zhi-xun XIE Yong-gao College of Aerospace and Materials Engineering National University of Defense Technology Changsha 410073 China

A primary air jet vectoring control system with a novel synthetic jet actuator （SJA） is presented and simulated numerically. The results show that, in comparison with an existing traditional synthetic jet actuator, which is able to perform the duty of either ＂push＂ or ＂pull＂, one novel synthetic jet actuator can fulfill both ＂push＂ and ＂pull＂ functions to vector the primary jet by shifting a slide block inside it. Therefore, because the new actuator possesses greater efficiency, it has potentiality to replace the existing one in various appli- cations, such as thrust vectoring and the reduction of thermal signature. Moreover, as the novel actuator can fulfill those functions that the existing one can not, it may well be expected to popularize it into more flow control systems.

关键词： jet vectoring control synthetic jet actuator slide block flow control

Brominated Butyl Rubber Anticorrosive Coating and its Self-healing Behaviors

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Chinese Journal of Polymer Science 2023年第2期41卷 297-305页

作者： Guang-bing luo Bo Pang Xing-Qi luo Yi Wang Hong Zhou Li-Juan Zhao College of Chemistry and Materials Science Sichuan Normal UniversityChengdu610066China The Second Research Institute of Civil Aviation Administration of China(CAAC) Chengdu610041China

Self-healing anticorrosive coatings in extreme environment have attracted considerable interest from *** this work,4-tert-butylpyridine(TBP)was incorporated into brominated butyl rubber(BIIR)polymer networks to form a reversible ionic bond with the highly reactive bromine *** on the low glass transition temperature of the BIIR polymer and the electrostatic effects,a robust self-healing anticorrosive coating of TBP-BIIR was ***-BIIR coating showed a maximum protection efficiency(PE)of more than 94%(TBP-BIIR-acid,94.37%;TBP-BIIR-alkali,94.95%;TBP-BIIR-salt,95.49%)when treated with a strong acid(HNO_(3),pH=2),strong base(NaOH,pH=12)and high salt solution(3.5 wt%NaCl).In addition,the PE of coating repaired exceed 89%,and the maximum PE value was approximately 95%in different solutions,which demonstrated its extinguished self-healing *** results indicated that the TBP-BIIR anticorrosive coating could provide excellent safety and durability in special environment,which would be extremely beneficial to improve the working life of metal parts used in aviation and shipping,oil and gas and related industries.

关键词： Brominated butyl rubber Self-healing Anticorrosive Coating

Prediction of Long-Term Extreme Response of Fish Cage Using Environmental Contour Method

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China Ocean Engineering 2021年第3期35卷 332-343页

作者： BAI Xiao-dong GUO Wei-wei YANG Can luo Han-bing State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China Department of Naval Architecture and Ocean Engineering Tianjin UniversityTianjin 300072China China Water Resources Bei Fang Investigation Design and Research CO.LTDTianjin 300222China College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China

The fish cage design requires accurate predictions of long-term extreme loads and *** with the time-consuming full long-term analysis method integrating all the probability distribution of the short-term extremes,the environmental contour method gains much attention in predicting the long-term extreme values due to the less computational *** paper investigates the long-term extreme response of a fish cage using the environmental contour *** fish cage is numerically simulated based on the lumped-mass method and the curved beam *** on the one-dimensional(1D)and two-dimensional(2D)environmental contour,the extreme responses,including the surge and heave motions,mooring force,and vertical bending of the floater,are predicted for different return periods and compared with the full long-term analysis *** indicate that the 1D method greatly underestimates the extreme *** 2D environmental contour method with a higher percentile level,namely90%,provides reasonable estimations and seems to be suitable for the long-term value *** studies show that the mooring arrangement and the bending stiffness have great effects on the bending moment and the mooring force and the mooring line pre-tension has minor effects on the fish cage response.

关键词： fish cage long-term extreme value environmental contour method sensitivity analysis

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藏学海洋中的一叶小舟——罗秉芬自述

中国藏学 2021年第3期 173-179页

作者：罗秉芬中央民族大学

罗秉芬教授(1931—2021),从事教学和科研工作长达六十余年,桃李满天下。在藏语文教学,敦煌文献,藏医药学,藏族历史、文化、宗教等方面的研究上都有所建树、硕果累累,为我国的民族语文教育和敦煌古藏文文献研究作出了巨大贡献。发表论文... 详细信息

罗秉芬教授(1931—2021),从事教学和科研工作长达六十余年,桃李满天下。在藏语文教学,敦煌文献,藏医药学,藏族历史、文化、宗教等方面的研究上都有所建树、硕果累累,为我国的民族语文教育和敦煌古藏文文献研究作出了巨大贡献。发表论文六十余篇,撰写著作十余部。在偶然的机会下,编辑部发现了罗秉芬教授写于2014年的自述,特此发表,以纪念这位耄耋之年仍笔耕不辍、令人敬仰的学者。

关键词：罗秉芬古藏文文献北京藏医院拉萨话宁蒗地区

Chemical, carbon and sulfur isotopic compositions constrain the origin of Upper Carboniferous-Lower Triassic gases in eastern Sichuan Basin, SW China

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Science China Earth Sciences 2024年第10期67卷 3169-3185页

作者： Chunfang CAI Ilya KUTUZOV Wenhua MEI Daowei WANG bing luo Shipeng HUANG bing HE Alon AMRANI China University of Petroleum National Key Lab Petroleum Resource&EngineeringBeijing 102249China State Key Laboratory of Lithospheric and Environmental Coevolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institute of Earth Sciences The Hebrew UniversityJerusalem 91904Israel College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Yulin University Yulin 719000China Research Institute of Exploration and Development Southwest Oil&Gas Field CompanyPetroChinaChengdu 610051China PetroChina Research Institute of Petroleum Exploration and DevelopmentBeijing 100083China

Methane dominated gas is one of the cleanest energy resources;however, there is no direct method to determine its source rock. Natural gases produced from the eastern Sichuan Basin together with seismic data were studied for their sources and secondary alteration by thermochemical sulfate reduction(TSR). Our results demonstrate that Upper Permian to Lower Triassic(P_(3)ch-T_(1)f) gases in the surrounding of the Kaijiang-Liangping area show volatile organic sulfur compounds(VOSCs) δ^(34)S values close to those of the associated H_(2)S, and may have been altered by methane-dominated TSR, resulting in positive shift in methane δ^(13)C_(1)values with increasing TSR extents. Other(or group 2) gases produced from the P_(3)ch-T_(1)f reservoirs from the southern area and the Upper Carboniferous to Middle Permian(C_(2)h-P_(2)q) from the eastern Sichuan Basin are not significantly changed by TSR, show similar δ^(34)S values between the kerogens and some VOSCs, and may have been derived from the Lower Silurian and Middle Permian source rocks. This study demonstrates a case for the first time showing the δ^(34)S values of VOSCs can be used as a tool for direct correlation between non-TSR altered gas and source rocks. Methane-dominated gas pools can be found using gas and source rock geochemistry combined with seismic data.

关键词： Sulfur isotopes Volatile organic sulfur compounds Thermochemical sulfate reduction Sichuan Basin Gas-source rock correlation