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Low-Rank Optimal Transport for Robust Domain Adaptation

IEEE/CAA Journal of Automatica Sinica 2024年第7期11卷 1667-1680页

作者： Bingrong Xu Jianhua Yin cheng Lian Yixin su Zhigang Zeng IEEE the School of Automation Wuhan University of TechnologyWuhan 430070China Intelligent Transportation Systems Research Center Wuhan University of TechnologyWuhan 430063 Chongqing Research Institute Wuhan University of TechnologyChongqingChina the School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074 the Key Laboratory of Image Processing and Intelligent Control of Education Ministry of China Wuhan 430074China

When encountering the distribution shift between the source(training) and target(test) domains, domain adaptation attempts to adjust the classifiers to be capable of dealing with different domains. Previous domain adaptation research has achieved a lot of success both in theory and practice under the assumption that all the examples in the source domain are welllabeled and of high quality. However, the methods consistently lose robustness in noisy settings where data from the source domain have corrupted labels or features which is common in reality. Therefore, robust domain adaptation has been introduced to deal with such problems. In this paper, we attempt to solve two interrelated problems with robust domain adaptation:distribution shift across domains and sample noises of the source domain. To disentangle these challenges, an optimal transport approach with low-rank constraints is applied to guide the domain adaptation model training process to avoid noisy information influence. For the domain shift problem, the optimal transport mechanism can learn the joint data representations between the source and target domains using a measurement of discrepancy and preserve the discriminative information. The rank constraint on the transport matrix can help recover the corrupted subspace structures and eliminate the noise to some extent when dealing with corrupted source data. The solution to this relaxed and regularized optimal transport framework is a convex optimization problem that can be solved using the Augmented Lagrange Multiplier method, whose convergence can be mathematically proved. The effectiveness of the proposed method is evaluated through extensive experiments on both synthetic and real-world datasets.

关键词： Domain adaptation low-rank constraint noise corruption optimal transport

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Achieving ultralow leakage current in Schottky-MIS cascode anode lateral field-effect diode based on AlGaN/GaN HEMT

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Science China(Information Sciences) 2025年第1期68卷 379-385页

作者： Fangzhou WANG Changhong GAO Guojian DING cheng YU Zhuocheng WANG Xiaohui WANG Qi FENG Ping YU Peng ZUO Wanjun CHEN Yang WANG Haiqiang JIA Hong CHEN Bo ZHANG Zeheng WANG Songshan Lake Materials Laboratory School of Microelectronics Southern University of Science and Technology State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Manufacturing Commonwealth Scientific and Industrial Research Organisation

In this paper,we design and fabricate a Schottky-metal-insulator-semiconductor（MIS） cascode anode GaN lateral field-effect diode（CA-LFED） to achieve ultralow reverse leakage current(ILEAK).The device based on AlGaN/GaN highelectron-mobility-transistor（HEMT） includes a normally-off MIS-controlled channel that is cascoded with a high barrier height Schottky *** reverse bias,the high electric-field is effectively prevented by the normally-off MIS-controlled channel *** with the high barrier height Schottky contact,this feature significantly suppresses the *** by the device fabrication,the CA-LFED with high breakdown voltage（BV）>600 V shows an ultralow ILEAKof 3.6×10-9A/mm as well as a low forward voltage drop（VF） of 2.2 *** performance suggests that the CA-LFED can be a promising candidate for ultralow ILEAKand better VF-ILEAKtrade-off GaN power diode applications.

关键词： Schottky-MIS cascode anode lateral field-effect diode (LFED) ultralow reverse leakage current ($I_{\rm{LEAK}}$) forward drop and reverse leakage trade-off AlGaN/GaN HEMTs

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Endovascular interventions may save limbs in elderly subjects with severe lower extremity arterial disease

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Journal of Geriatric Cardiology 2021年第11期18卷 957-967页

作者： Min-I su cheng-Wei LIU Division of Cardiology Department of Internal MedicineTaitung MacKay Memorial HospitalTaitung BranchChina MacKay Medical College New Taipei CityTaiwanChina Graduate Institute of Business Administration College of ManagementNational Dong Hwa UniversityHualienTaiwanChina Division of Cardiology Department of Internal MedicineTri-Service General Hospital Songshan BranchNational Defense Medical CenterTaipeiTaiwanChina Graduate Institute of Clinical Medicine College of MedicineNational Taiwan UniversityTaipeiTaiwanChina

Endovascular intervention,such as percu-taneous transluminal angioplasty(PTA),improves claudication and saves limbs of patients with severe lower extremity arterial dis-ease(LEAD).[1]A previous study showed that the mortality among octogenarians was as high as 29%regardless of the type of intervention and that re-vascularization was associated with high peripro-cedural mortality.[2]A previous study had already shown that reconstructive surgery for elderly indi-viduals over 80 years old resulted in a significantly higher mortality rate than that for patients between 70 and 80 years old,whereas endovascular inter-vention and primarily conservative treatment had comparable prognoses.[3]Consistently,another study showed that the risks of both overall and am-putation-free survival were significantly lower with endovascular treatment than with bypass surgery in patients with critical limb ischemia.[4]A systematic review and meta-analysis of 27 studies(15 cohort and 12 randomized controlled trials)with 1642 pa-tients suggests that conservative treatment may be considered for nonreconstructable patients with critical limb ischemia;[5]however,because a high risk of bias and serious inconsistencies were found in the included studies,the meta-analysis provided low-quality *** contrast,a small cohort study with 49 patients suggests that amputation im-proved quality of life and health status in fragile elderly individuals.

关键词： mortality limbs arterial

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Toxic effects of acetochlor, methamidophos and their combination on nifH gene in soil

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Journal of Environmental Sciences 2007年第7期19卷 864-873页

作者： su Zhen-cheng ZHANG Hui-wen LI Xin-yu ZHANG Qin ZHANG cheng-gang Key Laboratory of Terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China. Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Toxic effects of two agrochemicals on nifH gene in agricultural black soil were investigated using denaturing gradient gel electrophoresis （DGGE） and sequencing approaches in a microcosm experiment. Changes of soil nifH gene diversity and composition were examined following the application of acetochlor, methamidophos and their combination. Acetochlor reduced the nifH gene diversity （both in gene richness and diversity index values） and caused changes in the nifH gene composition. The effects of acetochlor on nifH gene were strengthened as the concentration of acetochlor increased. Cluster analysis of DGGE banding patterns showed that nifH gene composition which had been affected by low concentration of acetochlor （50 mg/kg） recovered firstly. Methamidophos reduced nifH gene richness that except at 4 weeks. The medium concentration of methamidophos （150 mg/kg） caused the most apparent changes in nifH gene diversity at the first week while the high concentration of methamidophos （250 mg/kg） produced prominent effects on nifH gene diversity in the following weeks. Cluster analysis showed that minimal changes of nifH gene composition were found at 1 week and maximal changes at 4 weeks. Toxic effects of acetochlor and methamidophos combination on nifH gene were also apparent. Different nifH genes （bands） responded differently to the impact of agrochemicals： four individual bands were eliminated by the application of the agrochemicals, five bands became predominant by the stimulation of the agrochemicals, and four bands showed strong resistance to the influence of the agrochemicals. Fifteen prominent bands were partially sequenced, yielding 15 different nifH sequences, which were used for phylogenetic reconstructions. All sequences were affiliated with the alpha- and beta-proteobacteria, showing higher similarity to eight different diazotrophic genera.

关键词： agrochemicals acetochlor methamidophos toxic effects nifH gene PCR-DGGE

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Main Melody Configuration and Chord Algorithm for Relaxing Music Generation

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Intelligent Automation & Soft Computing 2023年第1期35卷 661-673页

作者： Chih-Fang Huang Ai-Hsien Fan Jin-Huang Huang hsing-cheng Huang Department of Health and Marketing Kainan UniversityTaoyuanTaiwanChina Master Program at School of Healthcare Management Kainan UniversityTaoyuanTaiwanChina Ph.D.Program of Mechanical and Aeronautical Engineering Feng Chia UniversityTaichungTaiwanChina

This study applies the diatonic chord in music theory,utilization rate,and the close relationship between the main chord system,the dominant chord system,and the subordinate chord *** the perspective of music theory,the computer can automatically and quickly analyze the music,and establish a set of algorithms for configuring the chord accompaniment for the main melody,called the symmetrical circle offifths algorithm,SCFA(Symmetrical Circle of Fifths Algorithm).SCFA can immediately confirm the key,perform harmony analysis,configure chord accompaniment for the main melody,and effectively and correctly complete any given melody or *** can also quickly analyze and correctly configure the chord accompaniment for any MIDI(Musical Instrument Digital Interface)music,enriching the musicality of the *** can also allow scorers or computer music creators to quickly deconstruct the harmony configuration of the *** the measurement of bio-feedback sensor HRV(Heart Rate Variability),it can achieve a relaxing music healing effect.

关键词： Symmetrical circle of fths algorithm SCFA bio-feedback sensor HRV heart rate variability relaxing music healing effect

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Catalytic atroposelective synthesis of indolyl quinazolinones bearing N-N/C-C diaxes

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Science China Chemistry 2025年

作者： Ning-Yi Wang Shuo Gao Zhu-Di Shu Bei-Bei cheng Chun Ma Yu-Chen Zhang Feng Shi Research Center of Chiral Functional Heterocycles School of Chemistry and Materials Science Jiangsu Normal University School of Petrochemical Engineering Changzhou University School of Chemistry and Chemical Engineering Henan Normal University

The first catalytic atroposelective synthesis of indole derivatives bearing N-N/C-C diaxes has been established by the strategy of de novo ring formation. By this strategy, various indolyl quinazolinones bearing vicinal N-N/C-C diaxes were synthesized in high yields with overall good diastereoselectivities and excellent enantioselectivities via chiral phosphoric acid-catalyzed onepot asymmetric formal (5+1) cycloaddition/oxidation reaction. Moreover, such indolyl quinazolinones bearing vicinal N-N/CC diaxes have good configurational stability and could be converted into new chiral ligands with applications in asymmetric catalysis. Therefore, this work not only offered a new member for the family of diaxial atropisomers, but also provided a powerful strategy for catalytic asymmetric synthesis of atropisomers bearing N-N/C-C diaxes.

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Recent progress on photoactive nonprecious transition-metal complexes

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Science China Chemistry 2025年第1期68卷 46-95页

作者： Zhong-Liang Gong Hong-Jie Zhang Yan cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui Feng Qiong Zhang Shaolong Gong Yong Chen Chang-Jiang Yao Yuan-Yuan Zhu Liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical Engineering Beijing Institute of Technology College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University School of Chemistry and Chemical Engineering Anhui University Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Photoactive complexes of nonprecious transition metals, mainly including those in the first-row and partially the second-row of the Periodic table of elements, have received increasing attention in view of their low cost and long-term sustainability. They are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices, artificial photosynthesis, photocatalysis, biodiagnostics, and therapeutics, etc. This review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes, including photoactive Zr, V, Cr, Mo, and W complexes, Mn complexes and hybrids, Fe, Co, Ni, and Cu complexes, and Zn and Cd complexes and hybrids. A particular focus is given on the molecular design, modulation of photophysical and photochemical properties, and applications of the representative and lately-developed nonprecious metal complexes. In addition, a perspective on the future development in this field is provided at the end of this review.

关键词： photoactive metal complexes earth-abundant metals nonprecious metal complexes luminescence photochemistry

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NHRPA:a novel hierarchical routing protocol algorithm for wireless sensor networks

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The Journal of China Universities of Posts and Telecommunications 2008年第3期15卷 75-81页

作者： cheng Hong-bing YANG Geng HU su-jun College of Computer Nanjing University of Posts and Telecommunications Nanjing 210003 China Department of Information Engineering College of Jiangsu Civil Vocation Nanjing 210036 China

Considering severe resources constraints and security threat hierarchical routing protocol algorithm. The proposed routing of wireless sensor networks （WSN）, the article proposed a novel protocol algorithm can adopt suitable routing technology for the nodes according to the distance of nodes to the base station, density of nodes distribution, and residual energy of nodes. Comparing the proposed routing protocol algorithm with simple direction diffusion routing technology, cluster-based routing mechanisms, and simple hierarchical routing protocol algorithm through comprehensive analysis and simulation in terms of the energy usage, packet latency, and security in the presence of node protocol algorithm is more efficient for wireless sensor networks. compromise attacks, the results show that the proposed routing

关键词： wireless sensor networks (WSN) routing protocol network security

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String Equations of the q-KP Hierarchy

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Chinese Annals of Mathematics,Series B 2011年第6期32卷 895-904页

作者： Kelei TIAN Jingsong HE Yucai su Yi cheng Wu Wen-Tsun Key Laboratory of Mathematics Department of Mathematics University of Science and Technology of China Hefei 230026 China Department of Mathematics Ningbo University Ningbo 315211 Zhejiang China Department of Mathematics Tongji University Shanghai 200092 China

Based on the Lax operator L and Orlov-Shulman's M operator,the string equations of the q-KP hierarchy are established from the special additional symmetry flows,and the negative Virasoro constraint generators {L-n,n ... 详细信息

关键词： q-KP hierarchy Additional symmetry String equations Virasoro constraints

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Hausdorff Measure of Homogeneous Cantor Set

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Acta Mathematica Sinica,English Series 2001年第1期17卷 15-20页

作者： cheng Qin QU Hui RAO Wei Yi su Department of Mathematics Zhongshan University Department of Mathematics Wuhan University Department of Mathematics Nanjing University

This paper gives the Hausdorff measure of a class of homogeneous Cantor sets.

关键词： Homogeneous cantor set Hausdorff measure Convexity

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