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Integral precession calibration method of PIGA on linear vibration table

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Chinese Journal of Aeronautics 2024年第3期37卷 219-236页

作者： Chuang SUN Shun-qing REN Jun-wei CAO ru HUO Department of Automation Tsinghua UniversityBeijing 100084China School of Astronautics Harbin Institute of TechnologyHarbin 150001China Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084China Faculty.of Information technology Beijing University of TechnologyBeijing 100124China

Linear vibration table can provide harmonic accelerations to excite the nonlinear error terms of Pendulous Integrating Gy.o Accelerometer(PIGA).Integral precession calibration method is proposed to calibrate PIGA on a linear vibration table in this *** on the precise expressions of PIGA’s inputs,the error calibration model of PIGA is *** angular velocity.errors of PIGA are suppressed by.integer periodic precession and the errors caused by.non-integer periods vibrating are *** complete calibration process,including planning,preparation,PIGA testing,and coefficient identification,is designed to optimize the test operations and evaluate the calibration *** effect of the main errors on calibration uncertainty.is analy.ed and the relative sensitivity.function is proposed to further optimize the test *** and simulation results verify.that the proposed 10-position calibration method can improve calibration uncertainties after compensating for the related *** order of calibration uncertainties of the second-and third-order coefficients are decreased to 10^(-8)(rad.s^(-1))/g^(2)and 10^(-8)(rad.s^(-1))/g3,*** with the other two classical calibration methods,the calibration uncertainties of PIGA’s nonlinear error coefficients can be effectively.reduced and the proportional residual errors are decreased less than 3×10-6(rad.s^(-1))/g by.using the proposed calibration method.

关键词： PIGA Linear vibration table Vibration measurement Calibration Error analy.is Uncertainty.analy.is

Experimental study.of air-water interface properties in self-aerated flows

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Journal of Hy.rody.amics 2019年第5期31卷 940-948页

作者： Wang-ru wei wei-lin Xu Jun Deng Zhong Tian Fa-xing Zhang State Key.Laboratory.of Hy.raulics and Mountain River Engineering Sichuan UniversityChengdu 610065China

The microscopic air-water structures and the interface area properties in the self-aerated flows are important research issues in the high-speed self-aerated *** present experimental study.concerns the mean and medium air chord length distributions in the self-aerated chute flows for different flow Rey.olds numbers and air concentration *** relationship between the microscopic and the macroscopic aerated properties in the air-water mixture region is *** distribution of the microscopic specific air-water interface area with the macroscopic air concentration variation is self-similar in the self-aerated *** view of the difference of the air-water structure in high and low aerated regions,a new relationship is proposed for predicting the distributions of a specific air-water interface area,and the agreement between the measured and predicted results is satisfactory.

关键词： Air-water interface area self-aeration air chord size chute flow experimental study

Phy.ical Lay.r Security.Scheme With AoI-Awareness for Industrial IoT Based on Covert Communications

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 276-278页

作者： y.ping Li Zhi-Xin Liu Jia-wei Su y.-Zhou y.an the Key.Laboratory.of Industrial Computer Control Engineering of Hebei Province Yanshan University

Dear Editor,Industrial Internet of things(IIoT) is a ty.ical application of cy.erphy.ical sy.tem(CPS). In the IIoT, wireless communication is an inevitable trend to replace the deploy.ent-limited wired transmission for cases with large-scale and mobile devices. However, wireless communication gives rise to critical issues related to phy.ical security. such as malicious detections and attacks [1].

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Analy.is on Link Between the Macroscopic and Microscopic Air–Water Properties in Self-Aerated Flows

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China Ocean Engineering 2018年第5期32卷 614-623页

作者： wei Wang-ru XU wei-lin DENG Jun TIAN Zhong ZHANG Fa-xing State Key.Laboratory.of Hy.raulics and Mountain River Engineering Sichuan University

Self-aeration in high-speed free surface flows occurs commonly.and is of interest to ocean engineering, hy.raulic engineering, and environmental engineering. For two-phase air–water flows, macroscopic air–water flow properties develop gradually. accompanied by.the change of microscopic air–water structures. In this article, representational experimental studies on macroscopic and microscopic characteristics of self-aerated open-channel flows are summarized and compared. The isolated effect of the flow Rey.olds number and air quantity.on the differences in air count rate and chord size are analy.ed and discussed. The results show that the characterized flow depth y. affected by.the turbulence transfer, is a specific criterion to distinguish the interior air–water structure development. Two distinct linear trends of self-aeration are found, depending on the y.y.ariation with a breaking point at Cmean =0.50. The air count rate and size scale in self-aerated flows are affected by.the air quantity.of self-aerated flows, even with identical flow Rey.olds numbers. Thus, a specific parameter is proposed to assess the air–water structures and a series of self-similarity.relationships in self-aeration properties are obtained. The link between macroscopic and microscopic air–water properties results in significant scale effect on air–water structures in self-aerated flows.

关键词： self-aeration two-phase flows air concentration air bubble open channel

Air bubble breakup in shear water flows generated by.a plug conduit:An experimental investigation

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Journal of Hy.rody.amics 2023年第6期35卷 1077-1088页

作者： Han Wu Mao-lin Zhou wei-lin Xu Wang-ru wei Jian-bo Li State Key.Laboratory.of Hy.raulics and Mountain River Engineering Sichuan UniversityChengdu610065China PowerChina Chengdu Engineering Corporation Limited Chengdu610072China

In the context of a sudden contraction plug conduit,the near-wall area experiences a significant shearing effect of water flow,however,the extent to which this shearing effect occurs in bubble-water flow and the related variation mechanisms of air bubble size and number remain *** study.employ. a model test method to investigate the diffusion process of bubble-water flow in a sudden contraction plug *** size and number of bubbles,as well as their distribution along the shearing section under vary.ng initial air volume conditions,are studied in detail using a high-speed image acquisition *** experimental findings reveal a self-similar relationship between the number and size of bubbles and their cross-sectional distribution over *** bubble number and size vary.in three stages,i.e.,quasi-suspension,shearing,and shearing completion *** direction perpendicular to the conduit exhibits peak values in bubble number distribution over the three stages,with peak value location vary.ng with the near-wall *** time progresses,the peak value increases,and a larger initial air volume corresponds to a smaller distance of the peak value location from the *** size of air bubbles near the wall is consistent with the minimum diameter of air bubbles in shear flow and is hardly.affected by.the initial air *** results aid in comprehending the change law of two-phase water and air flow under a strong shearing effect in the plug conduit,and provide useful insights for hy.raulic design in fluid engineering.

关键词： Air-water flows bubble properties air diffusion process plug conduits experimental study

Hy.RAULIC RESEARCH OF AERATORS ON TUNNEL SPILLWAy.

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Journal of Hy.rody.amics 2007年第3期19卷 330-334页

作者： ruAN Shi-ping WU Jian-hua WU wei-wei XI ru-ze College of Water Conservancy.and Hy.ropower Engineering Hohai University Nanjing 210098 China Anhui Institute of Hy.raulic Research Bengbu 233000 China

The selection of the configuration and size of an aerator was of importance for a tunnel spillway.under the conditions of high speed flows. Experimental investigations were conducted on the effects of entrained air on the tunnel spillway.in the Goupitan Project, based on the criterion of gravity.similarity.and the condition of aerated flow velocity.of over 6 m/s, with phy.ical models. The configurations of the aerators were presented of a larger bottom air concentration, to protect the tunnel spillway.from cavitation as well as to see no water fills in the grooves.

关键词： cavitation aerator air concentration tunnel spillway the Goupitan Project

Deep learning identification of novel autophagic protein-protein interactions and experimental validation of Beclin 2-Ubiquilin 1 axis in triple-negative breast cancer

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Oncology.research 2025年第1期33卷 67-81页

作者： Xiang Li Wenke Jin Lifeng Wu Huan Wang Xin Xie wei Huang B O Liu State Key.Laboratory.of Southwestern Chinese Medicine Resources School of Pharmacy and College of Medical Technology Chengdu University of Traditional Chinese Medicine Chengdu 611137 China. Department of Biotherapy Cancer Center and State Key Laboratory of Biotherapy West China Hospital Sichuan University Chengdu 610041 China.

Background:Triple-negative breast cancer (TNBC), characterized by.its lack of traditional hormone receptors and HER2, presents a significant challenge in oncology.due to its poor response to conventional therapies. Autophagy.is an important process for maintaining cellular homeostasis, and there are currently.autophagy.biomarkers that play.an effective role in the clinical treatment of tumors. In contrast to targeting protein activity. intervention with protein-protein interaction (PPI) can avoid unrelated crosstalk and regulate the autophagy.process with minimal interference pathway..Methods:Here, we employ.d Naive Bay.s, Decision Tree, and k-Nearest Neighbors to elucidate the complex PPI network associated with autophagy.in TNBC, aiming to uncover novel therapeutic targets. Meanwhile, the candidate proteins interacting with Beclin 2 were initially.screened in MDA-MB-231 cells using Beclin 2 as bait protein by.immunoprecipitation-mass spectrometry.assay. and the interaction relationship was verified by.molecular docking and CO-IP experiments after intersection. Colony.formation, cellular immunofluorescence, cell scratch and 3-(4,5-Dimethy.thiazol-2-y.)-2,5-dipheny.tetrazolium bromide (MTT) tests were used to predict the clinical therapeutic effects of manipulating candidate PPI.Results:By.developing three PPI classification models and analy.ing over 13,000 datasets, we identified 3733 previously.unknown autophagy.related PPIs. Our network analy.is revealed the central role of Beclin 2 in autophagy.regulation, uncovering its interactions with 39 newly.identified proteins. Notably. the CO-IP studies identified the substantial interaction between Beclin 2 and Ubiquilin 1, which was anticipated by.our model and discovered in immunoprecipitation-mass spectrometry.assay.results. Subsequently. investigations showed that overexpressing Beclin 2 increased Ubiquilin 1, promoted autophagy.dependent cell death, and inhibited proliferation and metastasis in MDA-MB-231 cells.

关键词： Artificial intelligence (AI) Autophagy Beclin 2 Protein-protein interactions (PPI) Triple-negative breast cancer (TNBC) Ubiquilin 1

Extraction of copper ions by.supercritical carbon dioxide

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Journal of Environmental Sciences 2000年第4期12卷 444-447页

作者： Cui, Z. Liu, J. Gao, L. wei, y. Dept. of Environmental Engineering Shandong University Jinan 250100 China

Complexation combined with supercritical fluid extraction was used to extract Cu2+ in this study. The effects of pressure, temperature, volume of CO2 on the efficiency.of extraction were sy.tematically.investigated. At the optimum condition a 57.32% recovery.was achieved. Addition of suitable amount of methanol (v/v = 5%) to the supercritical CO2 can increase in the extraction of Cu2+ (72.69%, RSD = 2.12%, n = 3). And the recovery.can further increase in the presence of non-ionic surfactant Triton X-100 because of its function of solubilization. Surfactant was first used in the extraction of metal ions in the present study. and the results are satisfied (90.52%, RSD = 2.20%, n = 3).

关键词： Carbon dioxide Chelation Copper Methanol Positive ions Pressure effects Solubility Surface active agents Thermal effects

Pollen and Plant Reproduction Biology. Blooming from East to West

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Molecular Plant 2013年第4期6卷 995-997页

作者： Alice y. Cheung Ravi Palanivelu wei-Hua Tang Hong-wei Xue wei-Cai y.ng Department of Biochemistry.and Molecular Biology University of Massachusetts Amherst MA USA University.of Arizona School of Plant Sciences Tucson AZ USA Shanghai Institute of Plant Phy.iology.and Ecology Chinese Academy of Sciences Shanghai China Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing China

The idea of assembling a Special Issue on Pollen Tube and Reproduction in Molecular Plant was conceived during the organization of the 2012 Pollen Biology.International Sy.posium and Workshop held at the Shanghai Institute of Plant Phy.iology.and Ecology.（SIPPE）, Chinese Academy.of Science （CAS）, 27-31 October 2012. wei-Hua Tang of the SIPPE led the organization, with the support of Hong-wei Xue, Director of SIPPE acting as Chair of the Organization Committee. The 2-d sy.posium was attended by.about 100 international participants and focused on reports and discus- sions on the most recent research activities in the field. The 2-d workshop that followed provided a forum for in-depth introduction on various aspects of pollen and plant reproduc- tion biology.to about 200 graduate students, postdoctoral fellows, and new investigators to the field.

关键词： MEETINGS POLLEN tube PLANT reproduction COMPUTATIONAL biology PLANT cells & tissues CONGRESSES