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低信噪比下的并行多延时相关帧同步算法

清华大学学报（自然科学版） 2006年第10期46卷 1677-1680页

作者：徐海吉吟东杨士元清华大学自动化系北京100084 清华大学信息技术研究院北京100084

为提高正交频分复用(OFDM)在低信噪比环境下的同步性能和抗噪能力,提出了一种并行多延时相关帧同步算法。该算法充分利用帧的前导训练符号周期重复的特点,在接收端滑动窗中并行处理多种延时相关运算,通过阈值判决进行帧检测,同时完成载... 详细信息

为提高正交频分复用(OFDM)在低信噪比环境下的同步性能和抗噪能力,提出了一种并行多延时相关帧同步算法。该算法充分利用帧的前导训练符号周期重复的特点,在接收端滑动窗中并行处理多种延时相关运算,通过阈值判决进行帧检测,同时完成载波频率同步,进而实现OFDM帧同步。该算法无须改动现有系统的物理帧结构,也不增加系统延时。理论分析和在加性G auss白噪声信道下的误帧率(FER)性能仿真证明:该算法的误帧率约为现有参考方案的1/10,信噪比(SNR)比参考方案提高约7 dB,能够工作在信噪比小于-1 dB的环境。

关键词：正交频分复用(OFDM) 并行延时相关帧同步帧检测频率同步

某典型冶炼企业场地土壤中铊空间分布特征及来源解析

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有色金属（冶炼部分） 2024年第4期 162-169,177页

作者：王文浩冯雯娟邓思维范琴钱磊徐猛于茵巫英东吴怡田雨余江四川大学建筑与环境学院成都610227 四川省生态环境科学研究院成都610041

为研究典型冶炼企业场地土壤中铊(Tl)污染程度、风险及来源,选取四川某冶炼企业场地土壤为对象,运用克里金插值、富集因子指数(EF)、潜在生态风险指数(E_(r)^(i))进行Tl风险评估,并通过多种分析模型对重金属来源进行解析。结果表明:研... 详细信息

为研究典型冶炼企业场地土壤中铊(Tl)污染程度、风险及来源,选取四川某冶炼企业场地土壤为对象,运用克里金插值、富集因子指数(EF)、潜在生态风险指数(E_(r)^(i))进行Tl风险评估,并通过多种分析模型对重金属来源进行解析。结果表明:研究区土壤Tl含量均值为0.82 mg/kg,富集因子指数为2.21,以中度污染为主(2堆存区>运输区,生产区、堆存区土壤Tl含量随深度增加呈上升趋势,在6~9 m深度有较高累积,运输区则表层累积较高。结合主成分分析结果表明,来源为冶炼生产活动对场地土壤Tl累积有较大贡献。

关键词：冶炼企业铊空间分布源解析

SAHA, an HDAC inhibitor, synergizes with tacrolimus to Prevent murine cardiac allograft rejection

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Cellular & Molecular Immunology 2012年第5期9卷 390-398页

作者： Xin Zhang Shu Hann yindong Kang Meng Guo Shanjuan Hong Fang Liu Shangxi Fu Liming Wang Quan-Xing Wang Institute of Organ Transplantation Changzheng HospitalShanghaiChina National Key Laboratory of Medical Immunology Second Military Medical UniversityShanghaiChina These authors contributed equally to this work.

Suberoylanilide hydroxamic acid （SAHA）, as a histone deacetylase （HDAC） inhibitor （HDACi）, was recently found to exhibit an immunosuppressive effect. However, whether SAHA can synergize with calcineurin inhibitors （CNIs） to inhibit allograft rejection and its underlying mechanism remain elusive. In this study, we demonstrated the synergistic effects of SAHA and non-therapeutic dose of tacrolimus （FK506） in prolonging the allograft survival in a murine cardiac transplant model. Concomitant intragraft examination revealed that allografts from SAHA-treated recipients showed significantly lower levels of IL-17 expression, and no discernable difference for IL-17 expressions was detected between SAHA- and SAHA/FK506-treated allograft as compared with allografts from FK506-treated animals. In contrast, administration of FK506 significantly suppressed interferon （IFN）-y but increased IL-IO expression as compared with that of SAHA-treated animals, and this effect was independent of SAHA. Interestingly, SAHA synergizes with FK506 to promote Foxp3 and CTLA4 expression. In vitro, SAHA reduced the proportion of Th17 cells in isolated CD4＋ T-cell population and decreased expressions of IL-17A, IL-17F, STAT3 and RORyt in these cells. Moreover, SAHA enhances suppressive function of regulatory T （Treg） cells by upregulating the expression of CTLA-4 without affecting T effector cell proliferation, and increased the proportion of Treg by selectively promoting apoptosis of T effector cells. Therefore, SAHA, a HDACi, may be a promising immunosuppressive agent with potential benefit in conjunction with CNI drugs.

关键词： allograft rejection HDAC inhibitor Th17 Treg

Importance and vulnerability of lakes and reservoirs supporting drinking water in China

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Fundamental Research 2023年第2期3卷 265-273页

作者： Yunlin Zhang Jianming Deng Boqiang Qin Guangwei Zhu Yinjun Zhang Erik Jeppesen yindong Tong State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China China National Environmental Monitoring Centre 8(B)Dayangfang Beiyuan RoadChaoyang DistrictBeijing 100012China Department of Ecoscience and Arctic Research Centre Aarhus University8600SilkeborgDenmark Sino-Danish Centre for Education and Research Chinese Academy of SciencesBeijing 100101China Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and ImplementationMiddle East Technical UniversityAnkara 06800Turkey Institute of Marine Sciences Middle East Technical UniversityErdemli-Mersin 33731Turkey School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China

Drinking water is closely related to human health,disease and mortality,and contaminated drinking water causes 485,000 deaths from diarrhea each year *** has been facing increasingly severe water scarcity due to both water shortages and poor water *** safe and clean drinking water is a great challenge and top priority,especially for China with 1.4 billion *** China,more than 4000 centralized drinking water sources including rivers,lakes and reservoirs,and groundwater have been established to serve urban ***,there is little knowledge on the percentage,serving population and water quality of three centralized drinking water source *** collected nationwide centralized drinking water sources data and serving population data covering 395 prefecture-level and county-level cities and water quality data in the two most populous provinces(Guangdong and Shandong)to examine their contribution and ***,the drinking water source types can be classified into three clear regions exhibiting apparent differences in the respective contributions of rivers,lakes and reservoirs,and *** further found that overall,lakes and reservoirs account for 40.6%of the centralized drinking water sources ***(30.8%)and groundwater(28.6%)in *** and reservoirs are particularly important in the densely populated eastern region,where they are used as drinking water sources by 51.0%of the population(318 million).Moreover,the contribution to the drinking water supply from lakes and reservoirs is increasing due to their better water quality and many cross-regional water transfer *** results will be useful for the government to improve and optimize the establishment of centralized drinking water sources,which provide safe and clean drinking water in China to safeguard people's lives and health and realize sustainable development goals.

关键词： Centralized drinking water source Drinking water safety Lakes and reservoirs Population Water quality

Unintended nutrient imbalance induced by wastewater effluent inputs to receiving water and its ecological consequences

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Frontiers of Environmental Science & Engineering 2022年第11期16卷 273-275页

作者： yindong Tong Xuejun Wang James J.Elser School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China College of Urban and Environmental Sciences Peking UniversityBeijing 100871China Flathead Lake Biological Station University of MontanaPolsonMT 59860USA

Eutrophication is the most widespread water quality issue *** date,most efforts to control eutrophication have focused on reductions of external nutrient inputs,yet importance of nutrient stoichiometry and subsequent shift in plankton composition in aquatic ecosystem has been largely *** address eutrophication,improved sanitation is one of the United Nations Sustainable Development Goals,spurring the constructions of wastewater treatment facilities that have improved water quality in many lakes and ***,control measures are often targeted at and effective in removing a single nutrient from sewage and thus are less effective in removing the others,resulting in the changes of nutrient *** general,more effective phosphorus removal relative to nitrogen has occurred in wastewater treatment leading to substantial increases in N/P ratios in effluent relative to the ***,high N/P ratios in receiving waters can impose negative influences on ***,longterm strategies for domestic wastewater management should not merely focus on the total reduction of nutrient discharge but also consider their stoichiometric balances in receiving waters.

关键词： Nutrient stoichiometry Wastewater treatment Ecosystem functioning Water quality management

生物反馈电刺激和低能量体外冲击波在慢性前列腺炎/慢性盆腔疼痛综合征患者中的疗效观察

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中国男科学杂志 2024年第3期38卷 54-60页

作者：徐柳汀张斌苗鹏程康印东吴悠悠常德辉中国人民解放军联勤保障部队第九四〇医院泌尿外科全军泌尿外科中心甘肃兰州730050 中国人民解放军联勤保障部队第九四〇医院内分泌科甘肃兰州730050

目的对比BF/ES和Li-ESWT在治疗CP/CPPS中的有效性。方法选择2023年1月至2023年10月在本院门诊就诊的50例CP/CPPS患者,随机分为对照组(17)、实验组A(17)、实验组B(16),对照组基于UPOINTS系统指导治疗,实验组A联合BF/ES,实验组B联合Li-ES... 详细信息

目的对比BF/ES和Li-ESWT在治疗CP/CPPS中的有效性。方法选择2023年1月至2023年10月在本院门诊就诊的50例CP/CPPS患者,随机分为对照组(17)、实验组A(17)、实验组B(16),对照组基于UPOINTS系统指导治疗,实验组A联合BF/ES,实验组B联合Li-ESWT,比较各组治疗前后NIH-CPSI、IPSS、Qmax、VAS,IIEF-5、C-ISFPE、EPS-WBC,评价疗效差异。结果治疗前三组临床资料无统计学差异。治疗后三组在所有指标上均较治疗前有改善,具有统计学差异;与对照组相比,实验组A对U/T/O型患者症状改善更显著,实验组B对U/S型患者治疗效果更好,具有统计学差异。结论基于UPOINTS系统指导个体化治疗,联合BF/ES和Li-ESWT在CP/CPPS治疗中都具有一定的疗效。BF/ES可改善T/O型患者的盆底肌肉功能,减轻症状。Li-ESWT可改善S型患者性功能,BF/ES和Li-ESWT均可改善U型患者排尿症状。

关键词：慢性前列腺炎慢性盆腔疼痛综合征 UPOINTS临床表现分型系统生物电反馈体外冲击波疗法疗效对比研究

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某区域内地质灾害风险研究

煤炭技术 2024年第4期43卷 200-203页

作者：姬萌蕾姬寅东王誉龙张苏苏袁青松河南省地质局地质灾害防治中心郑州450000 河南省地质科学研究所有限公司郑州450000 河南省第五地质勘查院有限公司郑州450000 河南省第一地质勘查院有限公司郑州450000 河南省地质研究院郑州450000

为了最大程度减少因地质灾害伤亡和经济损失,研究了某区域地质灾害风险,主要地质灾害为崩塌、滑坡和地面塌陷,在GIS平台上,基于研究区数字高程模型(DEM)提取山脊、沟谷线,结合人工调整和现场调查结果等对研究区进行斜坡单元划分,共划分... 详细信息

为了最大程度减少因地质灾害伤亡和经济损失,研究了某区域地质灾害风险,主要地质灾害为崩塌、滑坡和地面塌陷,在GIS平台上,基于研究区数字高程模型(DEM)提取山脊、沟谷线,结合人工调整和现场调查结果等对研究区进行斜坡单元划分,共划分出327个评价单元;采用矩阵分析方法得出地质灾害风险性评价。研究得出,研究区地质灾害风险性评价结果将地质灾害防治区划分为重点防治区、次重点防治区、一般防治区,其中,重点防治区面积占研究区总面积的5.01%,次重点防治区面积占研究区总面积的20.20%,一般防治区面积占研究区总面积的74.79%。

关键词：地质灾害 GIS平台斜坡单元矩阵分析方法地质灾害风险性

Multi-soliton solutions for the three types of nonlocal Hirota equations via Riemann-Hilbert approach

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Communications in Theoretical Physics 2022年第11期74卷 37-44页

作者： yindong Zhuang Yi Zhang Heyan Zhang Pei Xia Department of Mathematics Zhejiang Normal UniversityJinhua 321004China

The purpose of the paper is to formulate multi-soliton solutions for the nonlocal Hirota equations via the Riemann-Hilbert(RH)*** RH problems are constructed and the zero structures are studied via performing spectral analysis of the Lax *** we consider three types of nonlocal Hirota equations by discussing different symmetry reductions of the potential *** the basis of the resulting matrix RH problem under the restriction of the reflectionless case,we successfully obtain the multi-soliton solutions of the nonlocal Hirota equations.

关键词： the nonlocal Hirota equation Riemann-Hilbert approach multi-soliton solutions

Characteristics of plankton Hg bioaccumulations based on a global data set and the implications for aquatic systems with aggravating nutrient imbalance

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Frontiers of Environmental Science & Engineering 2022年第3期16卷 121-133页

作者： Zhike Li Jie Chi Zhenyu Wu Yiyan Zhang Yiran Liu Lanlan Huang Yiren Lu Minhaz Uddin Wei Zhang Xuejun Wang Yan Lin yindong Tong School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China School of Economics and Management China University of PetroleumBeijing 102249China School of Environment and Natural Resource Renmin University of ChinaBeijing 100872China College of Urban and Environmental Sciences Peking UniversityBeijing 100871China Norwegian Institute for Water Research Oslo 0349Norway

The bioaccumulation of mercury(Hg)in aquatic ecosystem poses a potential health risk to human being and aquatic *** by plankton represent a crucial process of Hg transfer from water to aquatic food ***,the current understanding of major factors affecting Hg accumulation by plankton is *** this study,a data set of 89 aquatic ecosystems worldwide,including inland water,nearshore water and open sea,was *** factors influencing plankton Hg bioaccumulation(i.e.,plankton species,cell sizes and biomasses)were *** results indicated that total Hg(THg)and methylmercury(MeHg)concentrations in plankton in inland waters were significantly higher than those in nearshore waters and open *** factors for the logarithm of THg and MeHg of phytoplankton were 2.4–6.0 and 2.6–6.7 L/kg,respectively,in all aquatic *** could be further biomagnified by a factor of 2.1–15.1 and 5.3–28.2 from phytoplankton to *** MeHg concentrations were observed with the increases of cell size for both phyto-and zooplankton.A contrasting trend was observed between the plankton biomasses and BAF_(MeHg),with a positive relationship for zooplankton and a negative relationship for *** physiologic traits impose constraints on the rates of nutrients and contaminants obtaining process from ***,many aquatic ecosystems are facing rapid shifts in nutrient *** suggested that these potential influences on the growth and composition of plankton should be incorporated in future aquatic Hg modeling and ecological risk assessments.

关键词： Plankton Hg bioaccumulation Physiological characteristics A cross-system analysis Nutrient compositions Global data set