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Time Transfer in a 1839-km Telecommunication Fiber Link Demonstrating a Picosecond-Scale Stability

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Chinese Physics Letters 2024年第6期41卷 49-53页

作者：郭新兴侯丙安刘博杨凡孔维成刘涛董瑞芳张首刚 Key Laboratory of Time and Frequency Primary Standards National Time Service CenterChinese Academy of SciencesXi’an 710600China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Sichuan Taifu Ground Beidou Technology Co. LtdChengdu 610093China Hefei National Laboratory Hefei 230088China

An implementation of high-precision time transfer over a 1839-km field fiber loop back link between two provincial capitals of China,Xi’an and Taiyuan,is *** transfer stabilities of 6.5 ps at averaging time of 1 s and 4.6 ps at 40000 s were *** uncertainty for the time transfer system was evaluated,showing a budget of 56.2 *** results stand for a significant milestone in achieving high-precision time transfer over a field fiber link spanning thousands of kilometers,signifying a record-breaking achievement for the real-field time transfer in both stability and distance,which paves the way for constructing the nationwide high-precision time service via fiber network.

关键词： fiber nationwide Link

Impact of inhaled corticosteroid use on elderly chronic pulmonary disease patients with community acquired pneumonia

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Chinese Medical Journal 2024年第2期137卷 241-243页

作者： Xiudi Han Hong Wang Liang Chen Yimin Wang Hui Li Fei Zhou Xiqian Xing Chunxiao Zhang Lijun Suo Jinxiang Wang Guohua Yu Guangqiang Wang Xuexin Yao Hongxia Yu Lei Wang Meng liu Chunxue Xue bo liu Xiaoli Zhu Yanli Li Ying Xiao Xiaojing Cui Lijuan Li Xuedong liu Bin Cao Department of Pulmonary and Critical Care Medicine Qingdao Municipal HospitalQingdaoShandong 266011China Department of Nosocomial Infection Qingdao Municipal HospitalQingdaoShandong 266011China Department of Infectious Diseases Nanjing Lishui People’s HospitalNanjingJiangsu 211213China Department of Pulmonary and Critical Care Medicine National Clinical Research Center of Respiratory DiseasesCenter for Respiratory DiseasesChina-Japan Friendship HospitalBeijing 100020China Department of Respiratory Medicine Yan’an Hospital Affiliated to Kunming Medical UniversityKunmingYunnan 652199China Department of Respiratory Medicine Beijing Huimin HospitalBeijing 100054China Department of Pulmonary and Critical Care Medicine Zibo Municipal HospitalZiboShandong 255000China Department of Respiratory Medicine Beijing Luhe HospitalCapital Medical UniversityBeijing 101149China Department of Pulmonary and Critical Care Medicine Weifang No.2 People’s HospitalWeifangShandong 261599China Department of Respiratory Medicine Shandong University Affiliated Qilu Hospital(Qingdao)QingdaoShandong 266035China Department of Respiratory Medicine the 2nd Hospital of Beijing CorpsChinese Armed Police ForcesBeijing 100044China Department of Infectious Disease Qingdao University Medical College Affiliated Yantai Yuhuangding HospitalYantaiShandong 100191China Department of Respiratory Medicine Rizhao Chinese Medical Hospital Affiliated to Shandong Chinese Medical UniversityRizhaoShandong 276800China Department of Respiratory Medicine Beijing Hospital of Traditional Chinese Medicine Affiliated to Capital Medical UniversityBeijing 100010China Department of Occupational Medicine and Toxicology Beijing Chao-Yang HospitalCapital Medical UniversityBeijing 100020China

To the Editor:With an aging global population,the incidences of community-acquired pneumonia(CAP)and chronic obstructive pulmonary disease(COPD)have signicantly increased.[1]Previous studies have conrmed that COPD and asthma are independently associated with the prevalence of *** use of inhaled corticosteroid(ICS),the cornerstone of treatment for asthma,COPD with frequent acute exacerbations,and asthma-COPD overlap(ACO)may induce changes in the local lung microbiome and abnormal lung immunity,ultimately,causing a signicantly increased risk of ***,in cases of pneumonia,the effect of the use of ICS on CAP mortality remains *** data from one study favored the prior use of ICS,which was associated with a signicantly lower short-term mortality rate,[2]other studies have identied no impact on *** date,data on the impact of the use of ICS on mortality,prehospitalization or during hospitalization,are scarce,particularly in the older ***,this multicenter,retrospective study explored the association between the use of ICS during hospitalization and short-term mortality in older patients with CAP and those with chronic pulmonary disease(CPD).

关键词： pneumonia patients immunity

视频头脉冲试验在急性单侧外周前庭功能下降疾病中的应用进展

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中华耳鼻咽喉头颈外科杂志 2024年第3期59卷 271-276页

作者：刘颖钊刘波肖红俊华中科技大学同济医学院附属协和医院耳鼻咽喉头颈外科武汉430022

视频头脉冲试验(video head impulse test,vHIT)可定量评价受试者各半规管高频角前庭-眼动反射(vestibulo-ocular reflex,VOR)功能。临床发现,vHIT在不同急性外周前庭功能下降疾病中的结果可表现出异质性。如在前庭神经炎和亨特综合征... 详细信息

视频头脉冲试验(video head impulse test,vHIT)可定量评价受试者各半规管高频角前庭-眼动反射(vestibulo-ocular reflex,VOR)功能。临床发现,vHIT在不同急性外周前庭功能下降疾病中的结果可表现出异质性。如在前庭神经炎和亨特综合征患者中,病理性vHIT发生率最高的是水平半规管,且在前庭神经炎患者的前庭代偿期间,病理性vHIT的增益和回复性扫视表现为不同的恢复特征;而在突发性聋伴眩晕患者中,vHIT异常发生率最高的是后半规管,且后半规管的损伤与突发性聋患者的听力预后有关。vHIT与其他前庭功能检查技术(如前庭诱发肌源性电位)的综合应用可以为临床相关眩晕疾病的诊断、分型、预后评估和前庭康复治疗提供更多依据。

关键词：前庭功能突发性聋水平半规管前庭神经炎异常发生率后半规管伴眩晕回复性

Design of improved error-rate sliding window decoder for SC-LDPC codes: reliable termination and channel value reuse

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Optoelectronics Letters 2024年

作者： JIA Xishan LI Jining YAO Yuan WANG Yifan liu bo XU Degang School of Precision Instruments and Opto-electronics Engineering Tianjin University Key Laboratory of Optoelectronics Information Technology (Ministry of Education) Tianjin University Institute of Modern Optics College of Electronic Information and Optical Engineering Nankai University Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology

In this paper， an improved error-rate sliding window decoder is proposed for spatially coupled low-density parity-check (SC-LDPC) codes. For the conventional sliding window decoder， the message retention mechanism causes unreliable messages along the edges of belief propagation (BP) decoding in the current window to be kept for subsequent window decoding. To improve the reliability of the retained messages during the window transition， a reliable termination method is embedded， where the retained messages undergo more reliable parity checks. Additionally， decoding failure is unavoidable and even causes error propagation when the number of errors exceeds the error-correcting capability of the window. To mitigate this problem， a channel value reuse mechanism is designed， where the received channel values are utilized to reinitialize the window. Furthermore， considering the complexity and performance of decoding， a feasible sliding optimized-window decoding (SOWD) scheme is introduced. Finally， simulation results confirm the superior performance of the proposed SOWD scheme in both the waterfall and error floor regions. This work has great potential in the applications of wireless optical communication and fiber optic communication.

关键词：

气候风险、县域金融服务能力与农户金融脆弱性

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金融论坛 2024年第4期 70-80页

作者：刘波王修华湖南农业大学长沙410128 湖南大学统计学流动站湖南大学金融与统计学院

本文以“中国家庭金融调查”数据为样本,研究气候风险对农户金融脆弱性的影响,以及县域金融服务在缓解气候风险冲击中的传导机制。主要结论如下:(1)气候风险显著增加了农户金融脆弱性,提升县域金融机构数量及其多样性有助于缓释气候风... 详细信息

本文以“中国家庭金融调查”数据为样本,研究气候风险对农户金融脆弱性的影响,以及县域金融服务在缓解气候风险冲击中的传导机制。主要结论如下:(1)气候风险显著增加了农户金融脆弱性,提升县域金融机构数量及其多样性有助于缓释气候风险对农户的负面冲击;(2)提升县域金融服务能力有助于农户增加非农收入占比与金融资产比重,以应对气候风险的负面冲击;(3)异质性分析表明,气候风险仅对低收入农户的金融脆弱性存在显著影响,相比于中、高收入组,县域金融服务能力对气候风险的缓释作用在低收入农户中更大,相较于一般意义上的金融机构,增加保险类金融机构与农村金融机构数量更有利于降低农户金融脆弱性。

关键词：气候变化气候风险金融服务能力金融脆弱性

智能投顾算法透明的价值辩证、规制导向与实现路径

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深圳大学学报（人文社会科学版） 2024年第1期41卷 103-113页

作者：刘博涵贵州大学法学院贵州贵阳550025

运用人工智能技术进行大数据分析的智能投顾能够更好地落实投资者适当性原则,为投资者生成契合度更高的投资组合方案,却也暗藏了掩饰金融机构利益掠夺、致使投资方案风险错配、架空投资顾问法定义务等负面效应。算法透明有助于打破算法... 详细信息

运用人工智能技术进行大数据分析的智能投顾能够更好地落实投资者适当性原则,为投资者生成契合度更高的投资组合方案,却也暗藏了掩饰金融机构利益掠夺、致使投资方案风险错配、架空投资顾问法定义务等负面效应。算法透明有助于打破算法暴政、消除算法歧视,为算法问责奠定基础,而算法保密又是维持国家科技实力、保持科技企业市场竞争力之必需。面对算法透明与算法保密的价值冲突,彻底的算法透明和绝对的算法保密都失之偏颇,应根据规制算法的不同目的,以不同方式对不同主体实现不同程度、不同层次的算法透明。有层次的算法透明是比例原则之利益衡量功能、“目的—手段”合比例分析范式在智能投顾算法治理中的具体应用。要实现智能投顾的算法透明,应在事前利用“合规审查+算法备案”形成算法模型透明以防控系统性金融风险,在事中利用“算法告知+算法解释”形成算法逻辑透明以保障投资者的知情权利,事后评估算法对投资者信赖利益的影响程度,明确算法决策的主体性、因果性及关联性,以确定和分配算法责任。

关键词：智能投顾算法透明算法保密价值辩证规制导向实现路径

Neural network equalization based on delta-sigma modulation

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Chinese Optics Letters 2024年第4期22卷 8-13页

作者：刘博任建新吴翔宇陈帅东毛雅亚赵利 Nanjing University of Information Science&Technology Nanjng 210044China Key Laboratory for Information Science of Electromagnetic Waves(MoE) Fudan UniversityShanghai 200433China

We propose a neural network equalization delta-sigma modulation(DSM)*** performing DSM on the multiorder quadrature amplitude modulation(QAM)orthogonal frequency division multiplexing(OFDM)signal at the transmitting end,neural network equalizer technology is used in the digital signal processing at receiving *** this technology to a 4.6 km W-band millimeter wave system,it is possible to achieve a 1 Gbaud 8192-QAM OFDM signal *** data rate reached 23.4 Gbit/s with the bit error rate at 3.8×10^(-2),lower than soft-decision forward-error correction threshold(4×10^(-2)).

关键词： multi-order quadrature amplitude modulation W-band delta-sigma modulation neural network equalization nonlinear compensation

如何让壮志不难酬?领导动机对领导力涌现的作用机制研究

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中国软科学 2024年第2期 212-224页

作者：柳波高日光江西农业大学经济管理学院江西南昌330045 江西财经大学工商管理学院江西南昌330032

基于内隐领导理论与解释水平理论,探究领导动机通过工作绩效影响领导力涌现的内在逻辑与边界条件。研究发现:领导动机强的员工是否选择提升工作绩效(角色内绩效、创新绩效、组织公民行为)来实现领导之志,取决于其解释水平,高解释水平员... 详细信息

基于内隐领导理论与解释水平理论,探究领导动机通过工作绩效影响领导力涌现的内在逻辑与边界条件。研究发现:领导动机强的员工是否选择提升工作绩效(角色内绩效、创新绩效、组织公民行为)来实现领导之志,取决于其解释水平,高解释水平员工在领导动机驱动下会提升角色内绩效、创新绩效,从事组织公民行为,而低解释水平员工则不然;仅提升角色内绩效难以实现领导力涌现,而提升创新绩效和从事组织公民行为则有助于此。

关键词：领导力涌现领导动机工作绩效解释水平

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西藏米林高山松径向生长对气候变化的响应

第四纪研究 2024年第4期44卷 928-938页

作者：刘宇王亚锋刘波梁尔源南京林业大学生态与环境学院江苏南京210037 西北大学城市与环境学院陕西西安710127 中国科学院青藏高原研究所青藏高原地球系统与资源环境全国重点实验室北京100101

西藏东南部米林市广泛分布着高山松针叶林,很少受到人为活动的干扰,具有开展树木年代学研究的潜力。为此,本研究以藏东南米林市的高山松(Pinus densata)为研究对象,拟建立高山松树轮宽度标准年表,探讨高山松林的径向生长对气候变化的响... 详细信息

西藏东南部米林市广泛分布着高山松针叶林,很少受到人为活动的干扰,具有开展树木年代学研究的潜力。为此,本研究以藏东南米林市的高山松(Pinus densata)为研究对象,拟建立高山松树轮宽度标准年表,探讨高山松林的径向生长对气候变化的响应。相关分析和偏相关分析的结果表明,高山松的径向生长与上一年11月最低气温、当年8月最低气温和平均气温、当年4月降水和帕默尔干旱指数均呈显著正相关,与当年6月降水呈显著负相关。其中,高山松径向生长与4月降水量的相关最为显著,表明生长季初期降水量的缺乏限制了高山松的径向生长。百年尺度上高山松年表缺失轮数量有明显的上升趋势,并且缺轮数量与上一年9月至当年4月期间的逐月帕默尔干旱指数均呈显著正相关关系,表明生长季初期和末期的干旱不利于树木的生长。滑动相关分析进一步表明4月降水对高山松生长的主导作用。近一百年来米林市气候暖干化趋势显著,且季节降水分配不均,由此导致了高山松径向生长的水分限制。未来持续的气候变暖可能威胁米林市高山松林的正常生长。上述结论为快速气候变化背景下的西藏针叶林管理与保护提供了参考依据。

关键词：树木年轮气候变化暖干气候高山松缺失轮