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Iterative Signal Detection Based Soft Interference Cancellation for Satellite-Terrestrial Downlink NOMA Systems

China Communications 2024年第8期21卷 249-263页

作者： Sun Meng Zhang Qi Yao Haipeng Gao Ran Xin Xiangjun Tian feng feng weiying Chen Dong School of Electronic Engineering Beijing University of Posts and Telecommunications(BUPT)Beijing 100876China Beijing Key Laboratory of Space-Ground Interconnection and Convergence State Key Laboratory of Information Photonics and Optical CommunicationsSchool of Electronic EngineeringBeijing University of Posts and Telecommunications(BUPT)Beijing 100876China School of Information and Communication Engineering Beijing University of Posts and Telecommunications(BUPT)Beijing 100876China Beijing Institute of Technology Beijing 100081China Beihang University Beijing 100191China China Academy of Space Technology(CAST) Beijing 100094China

To improve the bit error rate(BER)performance of multi-user signal detection in satelliteterrestrial downlink non-orthogonal multiple access(NOMA)systems,an iterative signal detection algorithm based on soft interference cancellation with optimal power allocation is *** that power allocation has a significant impact on BER performance,the optimal power allocation is obtained by minimizing the average BER of NOMA *** to the allocated powers,successive interference cancellation(SIC)between NOMA users is performed in descending power *** each user,an iterative soft interference cancellation is performed,and soft symbol probabilities are calculated for soft *** improve detection accuracy and without increasing the complexity,the aforementioned algorithm is optimized by adding minimum mean square error(MMSE)signal estimation before detection,and in each iteration soft symbol probabilities are utilized for soft-decision of the current user and also for the update of soft interference of the previous *** results illustrate that the optimized algorithm ***-IDBSIC significantly outperforms joint multi-user detection and SIC detection by 7.57dB and 8.03dB in terms of BER performance.

关键词： non-orthogonal multiple access(NOMA) resource allocation satellite-terrestrial communication signal detection soft interference cancellation

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铁死亡在多发性骨髓瘤中作用的研究进展

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中国病理生理杂志 2024年第4期40卷 748-754页

作者：韩炯萍方泽浩封蔚莹绍兴文理学院医学院浙江绍兴312000 浙江省绍兴市人民医院血液科浙江绍兴312000

多发性骨髓瘤(multiple myeloma,MM)是一种克隆性浆细胞疾病,是全球第二常见的血液系统恶性肿瘤。21世纪以来,蛋白酶体抑制剂、免疫调节药物、单克隆抗体、双特异性抗体和嵌合抗原受体T细胞免疫治疗等各类新型治疗手段的应用,使MM患者... 详细信息

多发性骨髓瘤(multiple myeloma,MM)是一种克隆性浆细胞疾病,是全球第二常见的血液系统恶性肿瘤。21世纪以来,蛋白酶体抑制剂、免疫调节药物、单克隆抗体、双特异性抗体和嵌合抗原受体T细胞免疫治疗等各类新型治疗手段的应用,使MM患者的生存率得到提高[1]。但大部分MM患者在经历多药维持治疗后,仍会出现疾病的复发和进展。目前,MM尚不可治愈,迫切需要寻找新治疗靶点和探索新治疗模式。

关键词：多发性骨髓瘤铁死亡信号通路

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Bee Colony Optimization Algorithm for Routing and Wavelength Assignment Based on Directional Guidance in Satellite Optical Networks

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China Communications 2023年第7期20卷 89-107页

作者： Mai Yang Qi Zhang Haipeng Yao Ran Gao Xiangjun Xin feng Tian weiying feng Dong Chen Fu Wang Qinghua Tian Jinxi Qian School of Electronic Engineering Beijing University of Posts and Telecommunications(BUPT)Beijing 100876China Beijing Key Laboratory of Space-ground Interconnection and Convergence State Key Laboratory of Information Photonics and Optical CommunicationsSchool of Electronic EngineeringBeijing University of Posts and Telecommunications(BUPT)Beijing 100876China School of Information and Communication Engineering Beijing University of Posts and Telecommunications(BUPT)Beijing 100876China Beijing Institute of Technology Beijing 100081China Beihang University Beijing 100191China China Academy of Space Technology(CAST) Beijing 100094China

With the development of satellite communication,in order to solve the problems of shortage of on-board resources and refinement of delay requirements to improve the communication performance of satellite optical networks,this paper proposes a bee colony optimization algorithm for routing and wavelength assignment based on directional guidance(DBCO-RWA)in satellite optical *** D-BCORWA,directional guidance based on relative position and link load is defined,and then the link cost function in the path search stage is established based on the directional guidance ***,feasible solutions are expanded in the global optimization *** wavelength utilization,communication success probability,blocking rate,communication hops and convergence characteristic are *** results show that the performance of the proposed algorithm is improved compared with existing algorithms.

关键词： routing and wavelength assignment satel-lite optical networks bee colony optimization algo-rithm directional guidance feasible solution extension

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A symmetric substructuring method for analyzing the natural frequencies of conical origami structures

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Theoretical & Applied Mechanics Letters 2024年第3期14卷 203-210页

作者： Chenhao Lu Yao Chen weiying Fan Jian feng Pooya Sareh Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education and National Prestress Engineering Research CenterSoutheast UniversityNanjing 211189China School of Engineering University of LiverpoolLiverpool L693BXUnited Kingdom Creative Design Engineering Lab(Cdel) School of EngineeringNewcastle UniversityNewcastle upon Tyne NE17RUUnited Kingdom Escuela Técnica Superior de Ingeniería y Diseño Industrial Universidad Politécnica de Madrid(UPM)Madrid 28012Spain

Conical origami structures are characterized by their substantial out-of-plane stiffness and *** investigations have commonly focused on the static characteristics of these lightweight ***,the efficient analysis of the natural vibrations of these structures is pivotal for designing conicalorigami structures with programmable stiffness and *** this paper,we propose a novel method to analyzethe natural vibrations of such structures by combining a symmetric substructuring method(SSM)and a gener-alized eigenvalue *** exploits the inherent symmetry of the structure to decompose it into a finiteset of repetitive *** doing so,we reduce the dimensions of matrices and improve computationalefficiency by adopting the stiffness and mass matrices of the substructures in the generalized eigenvalue *** element simulations of pin-jointed models are used to validate the computational results of the ***,the parametric analysis of the structures demonstrates the influences of the number of seg-ments along the circumference and the radius of the cone on the structural mass and natural frequencies of ***,we present a comparison between six-fold and four-fold conical origami structures anddiscuss the influence of various geometric parameters on their natural *** study provides a strategyfor efficiently analyzing the natural vibration of symmetric origami structures and has the potential to contributeto the efficient design and customization of origami metastructures with programmable stiffness.

关键词： Natural structural vibration Origami design Group theory Symmetric substructuring method(SSM) Generalized eigenvalue analysis

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星地异构网络联合QoS保障关键技术

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天地一体化信息网络 2024年第1期5卷 32-39页

作者：林琳朱斌王泽林王光全姚海鹏董涛冯伟莹中国联合网络通信有限公司研究院北京102600 北京邮电大学北京100876 航天恒星科技有限公司北京100089 北京航空航天大学北京100191

针对星地异构网络的拓扑结构高动态、星地链路高差异、网络资源强受限等特征给星地融合业务高效承载带来重大挑战的问题,深入分析星地异构网络发展现状,提出星地异构网络联合QoS保障系统架构。并在此基础上,针对跨域资源统一编排管理、... 详细信息

针对星地异构网络的拓扑结构高动态、星地链路高差异、网络资源强受限等特征给星地融合业务高效承载带来重大挑战的问题,深入分析星地异构网络发展现状,提出星地异构网络联合QoS保障系统架构。并在此基础上,针对跨域资源统一编排管理、星地联合QoS指标参考体系构建、联合QoS动态策略调控、星地资源按需适配与部署等关键技术进行探讨。

关键词：星地异构网络服务质量低轨卫星

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Three decades of changes in water environment of a large freshwater Lake and its relationship with socio-economic indicators

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Journal of Environmental Sciences 2019年第3期31卷 156-166页

作者： Cuicui Li weiying feng Fanhao Song Zhongqi He fengchang Wu Yuanrong Zhu John P.Giesy Yingchen Bai Guangzhou Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences USDA-ARS Southern Regional Research Center Department of Biomedical Veterinary Sciences and Toxicology Centre University of Saskatchewan

Tai Lake(Ch: Taihu) has attracted international attention forcyanobacteria ***, the drivers of cultural eutrophication, especially long-term socio-economic indicators have been little researched. The results of research demonstrate how socioeconomic development affected quality of water and how it has been improved by anthropogenic activities. This study described variability in indicators of water quality in Tai Lakeand investigated thedrivers. Significant relationships existed between concentrations of annual mean total nitrogen(TN), total phosphorous(TP), chemical oxygen demand(COD) and biological oxygen demand(BOD), and population, per capital gross domestic production(GDP) and sewage discharge(p < 0.05). However, mechanisms causing change varied among TN, TP, COD and BOD. Before 2000, the main contributors to increases in concentrations of TN were human population, GDP and volumes of domestic sewage discharges. After 2000, discharges of industrial sewage become the primary contributor. After 1998, the regressions of annual mean TN, TP and COD on per capital GDP, population and domestic sewage discharge were reversed compared to the former period. Since 1999, an apparent inverted U-shaped relationship between environmental pollution and economic development has developed, which indicated that actions taken by governments have markedly improved quality of water in Tai Lake. The statistical relationship between BOD and per capital GDP didn't conform to the Kuznet curve. The Ushaped Kuznet curve may offer hope for the future that with significant environmental investments a high GDP can be reached and maintained without degradation of the environment, especially through appropriate management of industrial sewage discharge.

关键词： Eutrophic lake Water environment indicators Population GDP Sewage discharge Asia

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小麦新品种济儒麦20的选育

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中国种业 2024年第3期 134-136页

作者：赵凯黄玲冯维营邵敏敏王福玉陈贵菊张玉丹杨本洲孙雷明翟红梅王霖山东省济宁市农业科学研究院济宁272031

济儒麦20是济宁市农业科学研究院于2012年以丰收60为母本、08鉴75为父本,利用常规育种技术育成的小麦新品种。该品种产量水平高,抗病性好,高抗叶锈病和条锈病,高抗干热风,落黄好,越冬抗寒性1级。2021-2022年度参加山东省高肥水地组生产... 详细信息

济儒麦20是济宁市农业科学研究院于2012年以丰收60为母本、08鉴75为父本,利用常规育种技术育成的小麦新品种。该品种产量水平高,抗病性好,高抗叶锈病和条锈病,高抗干热风,落黄好,越冬抗寒性1级。2021-2022年度参加山东省高肥水地组生产试验平均产量为9745.5kg/hm2,比对照济麦22增产5.3%。2022年通过山东省农作物品种审定委员会审定,审定编号:鲁审麦20220005。

关键词：高产抗逆济儒麦20 选育

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Specific biotests to assess eco-toxicity of biodegradable polymer materials in soil

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Journal of Environmental Sciences 2021年第7期33卷 150-162页

作者： Haiyan Chen Fei Wang Huilun Chen HongDa Fang weiying feng Yuan Wei FanFan Wang HaiLei Su YiDong Mi Min Zhou XinRu Li Serena Doni Andrea Corti State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental ScienceBeijing 10012China School of Energy&Environmental Engineering University of Science and Technology BeijingBeijing 100083China Water Treatment Engineering Research Center of Jimei University Fujian 361021China School of Space and Environment Beihang UniversityBeijing 100191China Beijing Advanced Innovation Center for Big Data-Based Precision Medicine Beihang UniversityBeijing 100191China Eco-toxicology Laboratory National Research Council(CNR)-Institute of Ecosystem Study(ISE)Via Moruzzi 1Pisa 56124Italy INSTM Unit Department of Chemistry and Industrial ChemistryUniversity of Pisavia Risorgimento 3556126Italy BIOlabvia Vecchia Livornese 1291 Loc.S.Piero a Grado(Pi)Pisa 56122Italy

Eco-toxicity investigation of polymer materials was considered extremely necessary for their potential menace,which was widely use as mulching materials in *** this study,polyethylene(PE),polystyrene(PS)and synthetic biomaterials-Ecoflex and cellulose were applying into soil cultivated with two potential indicator plants species:oat(A v ena sati v a)and red radish(Raphanus sativum).Variety of chemical,biochemical parameters and enzyme activity in soil were proved as effective approach to evaluate polymers phytotoxicity in plant-soil *** F-value of biomass,pH,heavy metal and electoral conductivity of Raphanus behaved significant different from *** analysis results indicated biodegradation was fast in PE than PS,besides,heavy metals were dramatically decrease in the end implied the plant absorption may help decrease heavy metal *** increase value at T2 of Dehydrogenase activity(0.84 higher than average value for Avena&0.91 higher for Raphanus),Metabolic Index(3.12 higher than average value for Avena&3.81 higher for Raphanus)means during soil enzyme activity was promoted by biodegradation for its heterotrophic organisms’energy transportation was *** analysis was carried on Biplot PC1(24.2%of the total variance),PC2(23.2%of the total variance),versus PC3(22.8%of the total variance),which indicated phosphatase activity and metabolic index was significant correlated,and high correlation of ammonium and protease ***,the effects were more evident in Raphanus treatments than in Avena,suggesting the higher sensitivity of Raphanus to polymers treatment,which indicate biodegradation of polymers in Raphanus treatment has produced intermediate phytotoxic compounds.

关键词： Avena sativa Raphanus sativum Polymer materials Biodegradation Eco-toxicity Phytotoxicity

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Fluorescence regional integration and differential fluorescence spectroscopy for analysis of structural characteristics and proton binding properties of fulvic acid sub-fractions

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Journal of Environmental Sciences 2018年第12期30卷 116-125页

作者： Fanhao Song fengchang Wu weiying feng Zhi Tang John P.Giesy Fei Guo Di Shi Xiaofei Liu Ning Qin Baoshan Xing Yingchen Bai State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Science Department of Biomedical and Veterinary Biosciences and Toxicology Centre University of Saskatchewan College of Resources Environment and Tourism Capital Normal University Stockbridge School of Agriculture University of Massachusetts

Structural characteristics and proton binding properties of sub-fractions（FA3–FA13） of fulvic acid（FA）, eluted stepwise by pyrophosphate buffer were examined by use of fluorescence titration combined with fluorescence regional integration（FRI） and differential fluorescence spectroscopy（DFS）. Humic-like（H-L） and fulvic-like（F-L） materials, which accounted for more than 80% of fluorescence response, were dominant in five sub-fractions of FA. Based on FRI analysis, except the response of F-L materials in FA9 and FA13, maximum changes in percent fluorescence response were less than 10% as pH was increased from 2.5 to *** of carboxylic and phenolic groups were compared for fluorescence peaks of FA sub-fractions based on pH-dependent fluorescence derived from DFS. Static quenching was the dominant mechanism for binding of protons by FA sub-fractions. Dissociation constants（p Ka） were calculated by use of results of DFS and the modified Stern-Volmer relationship. The p Kaof H-L, F-L, tryptophan-like and tyrosine-like materials of FA subfractions exhibited ranges of 3.17–4.06, 3.12–3.97, 4.14–4.45 and 4.25–4.76, respectively, for acidic pHs. At basic pHs, values of p Ka for corresponding materials were in ranges of 9.71–10.24, 9.62–10.99, 9.67–10.31 and 9.33–10.28, respectively. At acidic pH, protein-like（P-L）materials had greater affinities for protons than did either H-L or F-L materials. The dicarboxylic and phenolic groups were likely predominant sites of protonation for both H-L and F-L materials at both acidic and basic pHs. Amino acid groups were significant factors during proton binding to protein-like materials of FA sub-fractions at basic pH.

关键词： Fluorescence titration Protonation Modified Stern-Volmer equation Dissociation constant Binding

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CEFR蒸汽发生器给水调节系统的设计与调试

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核动力工程 2024年第2期45卷 183-186页

作者：刘勇段天英冯伟伟张玮瑛中国原子能科学研究院北京102413

蒸汽发生器给水调节系统是中国实验快堆(CEFR)重要的控制系统,需要实现自动控制。根据该系统的控制需求针对性地设计了一套给水调节控制方案,并在CEFR实堆功率运行工况下验证了该控制方案。堆上试验结果表明,该控制方案能够在各种设计... 详细信息

蒸汽发生器给水调节系统是中国实验快堆(CEFR)重要的控制系统,需要实现自动控制。根据该系统的控制需求针对性地设计了一套给水调节控制方案,并在CEFR实堆功率运行工况下验证了该控制方案。堆上试验结果表明,该控制方案能够在各种设计工况下维持蒸汽发生器出口钠温稳定,具备抑制反应堆其他参数干扰的能力。本研究通过CEFR蒸汽发生器给水调节系统的设计与调试工作,实现了CEFR蒸汽发生器给水调节系统的自动化控制。

关键词： CEFR 蒸汽发生器给水调节系统自动控制

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