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Chinese Physics B 2024年第7期33卷 189-197页

作者：姜欢窈聂敏杨光孙爱晶张美玲裴昌幸 School of Communications and Information Engineering&School of Artificial Intelligence Xi'an University of Posts and TelecommunicationsXi'an 710121China State Key Laboratory of Integrated service Networks Xidian UniversityXi'an 710071China

In order to avoid the complexity of Gaussian modulation and the problem that the traditional point-to-point communication DM-CVQKD protocol cannot meet the demand for multi-user key sharing at the same time, we propose a multi-ring discrete modulation continuous variable quantum key sharing scheme(MR-DM-CVQSS). In this paper, we primarily compare single-ring and multi-ring M-symbol amplitude and phase-shift keying modulations. We analyze their asymptotic key rates against collective attacks and consider the security key rates under finite-size effects. Leveraging the characteristics of discrete modulation, we improve the quantum secret sharing scheme. Non-dealer participants only require simple phase shifters to complete quantum secret sharing. We also provide the general design of the MR-DM-CVQSS *** conduct a comprehensive analysis of the improved protocol's performance, confirming that the enhancement through multi-ring M-PSK allows for longer-distance quantum key distribution. Additionally, it reduces the deployment complexity of the system, thereby increasing the practical value.

关键词： discrete modulation continuous variable quantum secret sharing scheme

Practical Prescribed Time Tracking Control With Bounded Time-Varying Gain Under Non-Vanishing Uncertainties

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IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 219-230页

作者： Dahui Luo Yujuan Wang Yongduan Song the Key Laboratory of Dependable service Computing in Cyber Physical Society Ministry of EducationChongqing UniversityChongqing 400044 the School of Automation Chongqing UniversityChongqing 400044 the Star Institute for Intelligent Systems Chongqing 400044 IEEE

This paper investigates the prescribed-time control(PTC) problem for a class of strict-feedback systems subject to non-vanishing uncertainties. The coexistence of mismatched uncertainties and non-vanishing disturbances makes PTC synthesis nontrivial. In this work, a control method that does not involve infinite time-varying gain is proposed, leading to a practical and global prescribed time tracking control solution for the strict-feedback systems, in spite of both the mismatched and nonvanishing uncertainties. Different from methods based on control switching to avoid the issue of infinite control gain that involves control discontinuity at the switching point, in our method a softening unit is exclusively included to ensure the continuity of the control action. Furthermore, in contrast to most existing prescribed-time control works where the control scheme is only valid on a finite time interval, in this work, the proposed control scheme is valid on the entire time interval. In addition, the prior information on the upper or lower bound of gi is not in need,enlarging the applicability of the proposed method. Both the theoretical analysis and numerical simulation confirm the effectiveness of the proposed control algorithm.

关键词： Adaptive control prescribed time control(PTC) strict-feedback systems tracking control

Manipulating fast Li_(2)S redox via carbon confinement and oxygen defect engineering of In_(2)O_(3)for lithium-sulfur batteries

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Nano Research 2024年第6期17卷 5179-5187页

作者： Jinlei Qin Rui Wang Zilong Yuan Pei Xiao Deli Wang Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Lithium-sulfur(Li-S)batteries have been considered as promising energy storage systems due to the merits of high energy density and low ***,the lithium polysulfides(LiPSs)diffusion and sluggish redox kinetics hamper t... 详细信息

关键词： Li-S batteries nitrogen-doped carbon confinement oxygen vacancies bidirectional Li_(2)S redox

Prevalence and risk factors of diabetes mellitus among elderly patients in the Lugu community

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World Journal of Diabetes 2024年第4期15卷 638-644页

作者： Li-Zhen Zhao Wei-Min Li Ying Ma Lugu Community Health service Center West Campus Beijing Chao-yang Hospital Affiliated to Capital Medical UniversityBeijing 100043China

BACKGROUND Age is a significant risk factor of diabetes mellitus(DM).With the develop of population aging,the incidence of DM remains *** the epidemiology of DM among elderly individuals in a certain area contributes to the DM interventions for the local elderly individuals with high risk of *** To explore the prevalence of DM among elderly individuals in the Lugu community and analyze the related risk factors to provide a valid scientific basis for the health management of elderly *** A total of 4816 elderly people who came to the community for physical examination were retrospectively *** prevalence of DM among the elderly was *** individuals were divided into a DM group and a non-DM group according to the diagnosis of DM to compare the differences in diastolic blood pressure(DBP)and systolic blood pressure(SBP),fasting blood glucose,body mass index(BMI),waist-to-hip ratio(WHR)and incidence of hypertension(HT),coronary heart disease(CHD),and chronic kidney disease(CKD).RESULTS DM was diagnosed in 32.70%of the 4816 elderly *** BMI of the DM group(25.16±3.35)was greater than that of the non-DM group(24.61±3.78).The WHR was 0.90±0.04 in the non-DM group and 0.90±0.03 in the DM group,with no significant *** left SBP and SBP in the DM group were 137.9 mmHg±11.92 mmHg and 69.95 mmHg±7.75 mmHg,respectively,while they were 126.6 mmHg±12.44 mmHg and 71.15 mmHg±12.55 mmHg,respectively,in the non-DM *** findings indicate higher SBP and lower DBP in DM patients than in those without *** the DM group,1274 patients were diagnosed with HT,accounting for 80.89%.Among the 3241 non-DM patients,1743(53.78%)were hypertensive and 1498(46.22%)were *** DM group had more cases of HT than did the non-DM *** were more patients with CHD or CKD in the DM group than in the non-DM *** were more patients who drank alcohol more frequently(≥3 times)in the DM group than in the no

关键词： Diabetes mellitus Type 2 diabetes mellitus Elderly Risk factors

Review of GAN-Based Research on Chinese Character Font Generation

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Chinese Journal of Electronics 2024年第3期33卷 584-600页

作者： Xuanhong WANG Cong LI Zengguo SUN Luying HUI Xi'an University of Posts and Telecommunications School of Computer Science Shaanxi Normal University Key Laboratory of Intelligent Computing and service Technology for Folk Song Ministry of Culture and Tourism

With the rapid development of deep learning,generative adversarial network(GAN) has become a research hotspot in the field of computer *** has a wide range of applications in image *** by GAN,a series of models of Chinese character font generation have been proposed in recent *** this paper,the latest research progress of Chinese character font generation is analyzed and *** and its development history are ***-based methods for Chinese character font generation are clarified as well as their improvements,based on whether the specific elements of Chinese characters are *** public datasets used for font generation are summarized in detail,and various application scenarios of font generation are *** evaluation metrics of font generation are systematically summarized from both qualitative and quantitative *** paper contributes to the in-depth research on Chinese character font generation and has a positive effect on the inheritance and development of Chinese culture with Chinese characters as its carrier.

关键词： Generative adversarial network Font generation Image-to-image translation Deep learning

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Securing Sustenance

ChinAfrica 2024年第1期16卷 16-17页

作者： MBOMBO LOVEMORE Zimbabwe Public service Commission

National food security is the backbone of any economy,and achieving food security is essential for the prosperity of a *** my study in China at the Institute of South-South Cooperation and Development,Peking University,from September 2022 to July 2023,I leant how China has managed to achieve food security despite its large population of around 1.4 billion and numerous other challenges by means of strategic planning,e"ective policy execution,technological advancement and global collaboration.

关键词： backbone policy curing

Strengthening Ties, Shaping Futures The strategic evolution of Malaysia-China relations

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China Report ASEAN 2024年第6期9卷 52-53页

作者： Voon Miaw Ping International News service BERNAMA

In the annals of diplomacy,few narratives are as compelling as that of Malaysia-China relations:a saga of cooperation and mutual respect that has endured for over five *** in the historic visit of second Prime Minister Tun Abdul Razak to China in May 1974,this relationship has blossomed into a multifaceted partnership bolstered by visionary leadership and a commitment to shared prosperity.

关键词： mutual Malaysia strategic

Mucinous neoplasm of the appendix:A case report and review of literature

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 944-954页

作者： Hao-Cheng Chang Jung-Cheng Kang Ta-Wei Pu Ruei-Yu Su Chao-Yang Chen Je-Ming Hu Department of Surgery Tri-Service General HospitalTaipei 114TaiwanChina Division of Colon and Rectal Surgery Department of SurgeryTaiwanChina Adventist HospitalTaipei 105TaiwanChina Division of Colon and Rectal Surgery Department of SurgeryTri-Service General Hospital Songshan BranchNational Defense Medical CenterTaipei 105TaiwanChina Division of Colon and Rectal Surgery Department of SurgeryTri-Service General HospitalNational Defense Medical CenterTaipei 114TaiwanChina Department of Pathology Tri-Service General HospitalNational Defense Medical CenterTaipei 105TaiwanChina Department of Pathology and Laboratory Medicine Taoyuan Armed Forces General HospitalTaoyuan 325TaiwanChina

BACKGROUND Appendiceal mucinous neoplasms(AMNs),although not classified as rare,are relatively uncommon tumors most often discovered incidentally during colorectal *** identification of AMNs is difficult due to non-specific sym-ptoms,overlapping tumor markers with other conditions,and the potential for *** underscores the urgent need for precision in diagnosis to pre-vent severe *** SUMMARY This case report describes the unexpected discovery and treatment of a low-grade AMN(LAMN)in a 74-year-old man undergoing laparoscopic hemicolectomy for transverse colon adenocarcinoma(AC).Preoperatively,non-specific gastroin-testinal symptoms and elevated tumor markers masked the presence of *** tumor,presumed to be an AMN peritoneal cyst intraoperatively,was con-firmed as LAMN through histopathological *** neoplasm exhibited mucin accumulation and a distinct immunohistochemical profile:Positive for Ho-meobox protein CDX-2,Cytokeratin 20,special AT-rich sequence-binding protein 2,and Mucin 2 but negative for cytokeratin 7 and Paired box gene *** profile aids in distinguishing appendiceal and ovarian mucinous *** recovery was uncomplicated,and the patient initiated adjuvant chemotherapy for the colon *** This case highlights the diagnostic complexity of AMNs,emphasizing the need for vigilant identification to avert potential complications,such as pseudomyxoma peritonei.

关键词： Adenocarcinoma Appendiceal neoplasms Low-grade appendiceal mucinous neoplasm Peritoneal neoplasms Pseudomyxoma peritonei Case report

Joint Probability Analysis and Prediction of Sea Ice Conditions in Liaodong Bay

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Journal of Ocean University of China 2024年第1期23卷 57-68页

作者： LIAO Zhenkun DONG Sheng TAO Shanshan HUA Yunfei JIA Ning College of Engineering Ocean University of ChinaQingdao 266100China Shuifa Planning and Design Co. Ltd.Jinan 250100China National Hazards Mitigation service Beijing 100194China

Sea ice conditions in Liaodong Bay of China are often described by sea ice grades,which classify annual sea ice conditions based on the annual maximum sea ice thickness(AM-SIT)and annual maximum floating ice extent(AM-FIE).The joint probability distribution of AM-SIT and AM-FIE was established on the basis of their data pairs from 1949/1950 to 2019/2020 in Liaodong *** joint intensity index of the sea ice condition in the current year is calculated,and the joint classification criteria of the sea ice grades in past years are established on the basis of the joint intensity index series.A comparison of the joint criteria with the 1973 and 2022 criteria revealed that the joint criteria of the sea ice grade match well,and the joint intensity index can be used to quantify the sea ice condition over the years.A time series analysis of the sea ice grades and the joint intensity index sequences based on the joint criteria are then *** show a decreasing trend of the sea ice condition from 1949/1950 to 2019/2020,a mutation in 1990/1991,and a period of approximately 91 years of the sea ice *** addition,the Gray-Markov model(GMM)is applied to predict the joint sea ice grade and the joint intensity index of the sea ice condition series in future years,and the error between the results and the actual sea ice condition in 2020/2021 is small.

关键词： sea ice grade ice thickness floating ice extent Liaodong Bay copula

Syntheses and properties of associative acrylamide copolymers containing short hydrophobic chains used in a friction reducer for slick-water fracturing

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Petroleum Science 2024年第3期21卷 1889-1901页

作者： Ya-Xing Dai Xian-Li Zhang Si-Yuan Liu Feng-Run-Ze Zhang Yi-Xi Zhang Yu-Tong Sang Jing-Xi Zheng Zhao-Sheng Liu Peng Zhang College of Chemistry and Chemical Engineering Chongqing University of Science and Technology College of Ecology and Environment Chongqing Resources and Environmental Protection of University China Property Project Department of Dezhou Mining Property Service Center Shengli Oilfield Company of Sinopec

Two allyldimethylalkyl quaternary ammonium salt（AQAS） monomers, N,N-dimethylallylphenylpropylammonium bromide（AQAS1） and N,N-dimethylallylnonylammonium bromide（AQAS2）, were synthesized and used to prepare modified polyacrylamide materials. Two new drag reducers were synthesized from acrylamide（AM）, sodium acrylate（Na AA） and a cationic modified monomer（AQAS1 or AQAS2） via aqueous solution polymerization, and the copolymers were named P（AM/Na AA/AQAS1） and P（AM/Na AA/AQAS2）, respectively. The structures of the drag reduction agents were confirmed by IR and1H NMR spectroscopies. The molecular weight（Mw） of P（AM/Na AA/AQAS1） was 1.79 × 10～6g/mol. When the copolymer concentration was 1000 mg/L and the flow rate was 45 L/min, in fresh water the highest drag reduction rate was 75.8%, in 10,000 mg/L Na Cl solution the drag reduction rate decreased to 72.9%. The molecular weight of P（AM/Na AA/AQAS2） was 3.17 × 10～6g/mol. When the copolymer concentration was500 mg/L and the flow rate was 45 L/min, the drag reduction rate reached 75.2%, and in 10,000 mg/L Na Cl solution the drag reduction rate was 73.3%, decreased by approximately 1.9%. The drag reduction rate for partially hydrolyzed polyacrylamide（HPAM） was also investigated, and the results showed that the drag reduction rates for 500 and 1000 mg/L HPAM solutions were merely 43.2% and 49.0% in brine, respectively. Compared with HPAM, both of the above copolymers presented better drag reduction capacities.

关键词： Shale gas Slick water Drag reducer Modified monomer Copolymerization