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EXTENSION OF SMOOTHING NEWTON ALGORITHMS TO SOLVE LINEAR PROGRAMMING OVER SYMMETRIC CONES

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Journal of Systems Science & Complexity 2011年第1期24卷 195-206页

作者： Zhenghai HUANG xiaohong liu Department of Mathematics School of Science Tianjin University Tianjin 300072 China

There recently has been much interest in studying some optimization problems over symmetric cones. This paper deals with linear programming over symmetric cones （SCLP）. The objective here is to extend the Qi-Sun-Zhou＇s smoothing Newton algorithm to solve SCLP, where characterization of symmetric cones using Jordan algebras forms the fundamental basis for our analysis. By using the theory of Euclidean Jordan algebras, the authors show that the algorithm is globally and locally quadratically convergent under suitable assumptions. The preliminary numerical results for solving the second-order cone programming are also reported.

关键词： Euclidean Jordan algebra linear programming smoothing algorithm symmetric cone.

Sensitivity Study of Anthropogenic Aerosol Indirect Forcing through Cirrus Clouds with CAM5 Using Three Ice Nucleation Parameterizations

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Journal of Meteorological Research 2018年第5期32卷 693-706页

作者： Xiangjun SHI xiaohong liu Earth System Modeling Center and School of Atmospheric Sciences Nanjing University of Information Science &Technology Department of Atmospheric Science University of Wyoming Institute of Atmospheric Physics Chinese Academy of Sciences

Quantifying the radiative forcing due to aerosol-cloud interactions especially through cirrus clouds remains chal- lenging because of our limited understanding of aerosol and cloud processes. In this study, we investigate the anthro-pogenic aerosol indirect forcing （AIF） through cirrus clouds using the Community Atmosphere Model version 5 （CAM5） with a state-of-the-art treatment of ice nucleation. We adopt a new approach to isolate anthropogenic AIF through cirrus clouds in which ice nucleation parameterization is driven by prescribed pre-industrial （PI） and present- day （PD） aerosols, respectively. Sensitivities of anthropogenic ice AIF （i.e., anthropogenic AIF through cirrus clouds） to different ice nucleation parameterizations, homogeneous freezing occurrence, and uncertainties in the cloud micro- physics scheme are investigated. Results of sensitivity experiments show that the change （PD minus PI） in global an-nual mean longwave cloud forcing （i.e., longwave anthropogenic ice AIF） ranges from 0.14 to 0.35 W m^-2, the change in global annual mean shortwave cloud forcing （i.e., shortwave anthropogenic ice AIF） from -0.47 to -0.20 W m^-2, and the change in net cloud forcing from -0.12 to 0.05 W m^-2. Our results suggest that different ice nucle-ation parameterizations are an important factor for the large uncertainty of anthropogenic ice AIF. Furthermore, im-proved understanding of the spatial and temporal occurrence characteristics of homogeneous freezing events and the mean states of cirrus cloud properties are also important for constraining anthropogenic ice AIF.

关键词： aerosol indirect forcing cirrus clouds CAM5

Tunable vacancy defect chemistry on free-standing carbon cathode for lithium-sulfur batteries

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Green Energy & Environment 2023年第2期8卷 354-359页

作者： Xi Zhang xiaohong liu Wei Zhang Yingze Song State Key Laboratory of Environment-Friendly Energy Materials School of Materials Science and EngineeringSouthwest University of Science and TechnologyMianyang621010China National University of Singapore(Chongqing)Research Institute Chongqing401123China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing400714China

The defect chemistry is successfully modulated on free-standing and binder-free carbon cathodes for highly efficient Li-S redox *** rationally regulated defect engineering realizes the synchronization of ion/electron-conductive and defect-rich networks on the threedimension carbon cathode,leading to its tunable activity for both relieving the shuttle phenomenon and accelerating the sulfur redox reaction *** expected,the defective carbon cathode harvests a high rate capacity of 1217.8 mAh g^(-1)at 0.2 C and a superior capacity retention of61.7%at 2 C after 500 *** under the sulfur mass loading of 11.1 mg cm^(-2),the defective cathode still holds a remarkable areal capacity of 8.5 mAh cm^(-2).

关键词： Li–S chemistry Tunable vacancy defects Free-standing cathode Electrocatalytic activity Sulfur redox reaction kinetics

Fault-tolerant identity-based encryption from SM9

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Science China(Information Sciences) 2024年第2期67卷 104-117页

作者： xiaohong liu Xinyi HUANG Zhaohui CHENG Wei WU Fujian Provincial Key Laboratory of Network Security and Cryptology College of Computer and Cyber SecurityFujian Normal University Artificial Intelligence Thrust Information HubThe Hong Kong University of Science and Technology (Guangzhou) Olym Information Security Technology Ltd. Center for Applied Mathematics of Fujian Province School of Mathematics and StatisticsFujian Normal University

This paper initiates the formal study of attribute-based encryption within the framework of SM9,the Chinese National Cryptography Standard for Identity-Based Cryptography, by presenting two new faulttolerant identity-based encryption(FIBE) schemes. Our first scheme uses the same private-key/ciphertext structure as the original SM9 algorithm and operates in a small attribute universe. As a result, it can be effectively and smoothly integrated into the information systems using SM9. In the random oracle model,we prove that our scheme is ciphertext-indistinguishable against fuzzy selective-identity and chosen-plaintext attacks under the(k + 3)-DBDHI assumption. Our second design is a large universe FIBE scheme based on SM9 that is ciphertext-indistinguishable against chosen-plaintext attacks in the random oracle model under the(f, g)-GDDHE assumption. Finally, we compare the communication and computing costs of our schemes to those of other classical ones. The comparison shows that our schemes have comparable performance as others. We believe that our findings will accelerate the applications of SM9 in modern information systems such as cloud computing and blockchain.

关键词： attribute-based encryption identity-based encryption fault-tolerant SM9

On Modernization of the Diversified Resolution Mechanism for Civil and Commercial Disputes in China

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Frontiers of Law in China-Selected Publications from Chinese Universities 2024年第1期19卷 98-116页

作者： liu xiaohong School of International Law Shanghai University of Political Science and LawShanghai 201701China

The report to the 20th National Congress of the Communist Party of China put forward a scientific and systematic theory of the Chinese path to modernization,in which the modernization of the rule of law is both an integral part and a strong *** a modern socialist country in all respects under the rule of law requires attention to the settlement of civil and commercial *** separation of civil society and the political state,along with their mutual influence,has led to the development of diverse dispute-resolution *** has further accelerated their development and *** face of the adjustments to the dispute resolution system amid the unprecedented changes of the century,China should complete the top-level design of the diversified settlement of civil and commercial disputes by deploying legislative and judicial resources to enhance the leading role of litigation in resolving these *** the same time,China should continue to prioritize alternative dispute resolution mechanisms,improve the credibility of arbitration,and leverage the aggregating power of mediation,so as to serve the construction of the Chinese path to modernization.

关键词： Chinese path to modernization modernization of the rule of law diversified dispute resolution high-standard opening-up

Two-moment Bulk Stratiform Cloud Microphysics in the Grid-point Atmospheric Model of IAP LASG (GAMIL)

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Advances in Atmospheric Sciences 2013年第3期30卷 868-883页

作者：史湘军王斌 xiaohong liu Minghuai WANG State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Hebei Key Laboratory for Meteorology and Ecoenvironment Hebei Climate Center Pacific Northwest National Laboratory

A two-moment bulk stratiform microphysics scheme, including recently developed physically-based droplet activation/ice nucleation parameterizations has been implemented into the Grid-point Atmospheric Model of IAP LASG （GAMIL） as an effort to enhance the model＇s capability to simulate aerosol indirect effects. Unlike the previous one-moment cloud microphysics scheme, the new scheme produces a reasonable rep- resentation of cloud particle size and number concentration. This scheme captures the observed spatial variations in cloud droplet number concentrations. Simulated ice crystal number concentrations in cirrus clouds qualitatively agree with in situ observations. The longwave and shortwave cloud forcings are in better agreement with observations. Sensitivity tests show that the column cloud droplet number concentrations calculated from two different droplet activation parameterizations are similar. However, ice crystal number concentration in mixed-phased clouds is sensitive to different heterogeneous ice nucleation formulations. The simulation with high ice crystal number concentration in mixed-phase clouds has less liquid water path and weaker cloud forcing. ~rthermore, ice crystal number concentration in cirrus clouds is sensitive to different ice nucleation parameterizations. Sensitivity tests also suggest that the impact of pre-existing ice crystals on homogeneous freezing in old clouds should be taken into account.

关键词： two-moment cloud microphysics scheme atmospheric model

Photocatalytic degradation of Rhodamine B under visible light with Nd-doped titanium dioxide films

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Journal of Rare Earths 2009年第5期27卷 739-743页

作者： WU xiaohong SU Peibo liu Huiling QI Lili State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Department of Applied ChemistryHarbin Institute of Technology Harbin 150001 China School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150001 China School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150001 China

Microporous titanium dioxide films were prepared by the sol-gel methods on glass substrates, using tetrabutyl titanate as source material. In order to absorb the visible light and increase the photocatalytic activities, different concentrations of neodymium ions (Nd/Ti molar ratio was 0.5%, 0.7%, 0.9%, and 1.1% respectively) were added into the sol. X-ray diffraction (XRD), X-ray photoelectron spectros-copy (XPS), and atom force microscopy (AFM) were applied to characterize the modified films. A kind of typical textile industry pollutant (Rhodamine B) was used to evaluate the photocatalytic activities of the films under visible light. The results showed that the activities of the films were improved by doping Nd ions into the sol.

关键词： titanium dioxide visible light doping ion photocatalysis Rhodamine B rare earths

The development of MOFs-based nanomaterials in heterogeneous organocatalysis

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Science Bulletin 2018年第8期63卷 502-524页

作者： Xiaomei liu Bing Tang Jilan Long Wei Zhang xiaohong liu Zakaria Mirza Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province Institute of Applied Chemistry College of Chemistry and Chemical Engineering China West Normal University Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Department of Laboratory Medicine Southwest Hospital Third Military Medical University (Army Medical University)

Metal-organic framework(MOF) is a class of inorganic-organic hybrid material assembled periodically with metal ions and organic ligands. MOFs have always been the focuses in a variety of frontier fields owing to the advantageous properties, such as large BET surface areas, tunable porosity and easyfunctionalized surface structure. Among the various application areas, catalysis is one of the earliest application fields of MOFs-based materials and is one of the fastest-growing topics. In this review, the main roles of MOFs in heterogeneous organocatalysis have been systematically summarized, including used as support materials(or hosts), independent catalysts, and sacrificial templates. Moreover, the application prospects of MOFs in photocatalysis and electrocatalysis frontiers were also ***, the key issues that should be conquered in future were briefly sketched in the final parts of each item. We hope our perspectives could be beneficial for the readers to better understand these topics and issues, and could also provide a direction for the future exploration of some novel types of MOFs-based nanocatalysts with stable structures and functions for heterogeneous catalysis.

关键词： Metal-organic framework Heterogeneous organocatalysis Support materials Independent catalysts Sacrificial templates Photocatalysis and electrocatalysis

Deciphering the upper ordovician Wufeng siliceous shale depositional environments(Wuxi,NE Chongqing)based on multi-proxy record

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Petroleum 2021年第1期7卷 10-20页

作者： Longbo Xu Xingzhi Wang Mingyou Feng xiaohong liu School of Geoscience and Technology Southwest Petroleum UniversityChengdu610500China Sichuan Provincial Key Laboratory of Natural Gas Geology Southwest Petroleum UniversityChengdu610500China

Based on stratigraphic variations of petrology,geochemistry(major,trace elements),and pyrite framboids,we study the sedimentary environment of siliceous rocks of the Wufeng Formation in Wuxi,Northeastern Chongqing,*** Al2O3/(Al2O3þFe2O3),SiO2/Al2O3,with AleFeeMn values indicate that Wufeng Formation are deposited in a continental margin and influenced by detrital ***-MoEF and V/CreU/Th cross-plots suggest that the siliceous shale was formed in dysoxic to anoxic *** proxies imply that the lower,the middle to upper,and the top part of the Wufeng sediments were deposited in an anoxic,dysoxic and oxic environment,***,the average size of pyrite framboids are gradually increased from bottom to top,showing that increased oxidisability.A complete vibratory third-order cycle of sea level fluctuations during the Wufeng deposition can be *** Wufeng to Longmaxi transition,the sedimentary environment exhibits a short-scale oscillatory pattern and was probably transformed from an outer shelf to inner *** multi-proxies are considered more reliable proxies for deciphering redox conditions in fine-grained sediment.

关键词： Siliceous rocks Late ordovician Wufeng formation Multi-proxy record Pyrite framboid Sea-level fluctuations