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Performance Analysis in SWIPT-Based Bidirectional D2D Communications in Cellular Networks

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China Communications 2023年第12期20卷 41-51页

作者： Yang Zhang Wei Wang Xiangmo Zhao Jun hou School of Information Engineering Chang’an UniversityXi’an 710064China

In this paper,a novel traffic-aware cooperative cognitive radio network that can enable deviceto-device(D2D)communications in cellular system is proposed and *** providing relay cooperation to cellular transmission,D2D users can realize their own two-way communication in the licensed *** most existing works,in the proposed network,both wireless-powered D2D users can harvest energy via radio-frequency signals received from basic station(BS)through a hybrid protocol which can adaptively utilize both time-switching and powersplitting ***,D2D users perform decode-and-forward operation to transmit signals,and mobile user(MU)employs a selection combining *** addition,the performance of both D2D system and cellular system in the proposed network is evaluated by deriving the expressions of their exact outage probability and *** and simulation results validate correctness of derivations and reveal the influence of various system parameters of the proposed network.

关键词： D2D communication outage probability SWIPT

腹腔镜结直肠癌根治术患者创伤后应激障碍轨迹的纵向研究

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肿瘤预防与治疗 2024年第8期37卷 675-683页

作者：侯梦王玲宋丹萍海军军医大学第一附属长海医院手术室上海200433

目的:探讨腹腔镜结直肠癌根治术患者术后1年内创伤后应激障碍(posttraumatic stress disorder,PTSD)的纵向变化轨迹,分析心理维度、社会支持维度及炎症因子对轨迹类别的预测作用。方法:本研究为前瞻性观察性纵向研究。选取2021年2月至2... 详细信息

目的:探讨腹腔镜结直肠癌根治术患者术后1年内创伤后应激障碍(posttraumatic stress disorder,PTSD)的纵向变化轨迹,分析心理维度、社会支持维度及炎症因子对轨迹类别的预测作用。方法:本研究为前瞻性观察性纵向研究。选取2021年2月至2022年8月我院结直肠癌行腹腔镜根治术的患者为研究对象,于术后6周(T1)、术后3个月(T3)、术后6个月(T4)、术后9个月及术后12个月(T5)采用创伤后应激障碍平民版量表调查患者5个时间点的PTSD水平,采用潜类别增长模型(latent class growth model,LCGM)识别轨迹类别,采用Logistics回归分析识别轨迹类别的预测因素。结果:采用LCGM方法将193例腹腔镜结直肠癌根治术患者术后1年内PTSD的变化轨迹分为3个潜在类别即PTSD低水平组(占41%)、PTSD下降组(占33%)、PTSD进展组(占26%);选择PTSD低水平组作为参考类别,采用逐步进入法筛选变量,Logistic回归分析结果显示,高中及以上文化程度、下尿路不适及炎症因子[肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、白细胞介素-6(interleukin-6,IL-6)]水平越高的患者更易进入PTSD下降组,炎症因子(IL-6、TNF)、恐惧疾病进展及侵入性认知水平越高的患者更易进入PTSD进展组。结论:腹腔镜结直肠癌根治术患者术后1年内的PTSD存在异质性,有3种不同的变化轨迹,尤其应重视初始分值较低的PTSD进展组。临床医护人员应关注患者术后早期的身体不适症状,同时重视心理因素如恐惧疾病进展、侵入性认知及炎症因子对PTSD轨迹的预测作用,制定针对性的措施预防术后PTSD慢性进展。

关键词：腹腔镜根治术结直肠癌创伤后应激障碍轨迹纵向研究

Hot Deformation and Modeling of Flow Stress for a Ti-containing HSLA Steel

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Journal of Materials Science & Technology 1998年第5期14卷 419-424页

作者： Xu, Yourong hou, Dahua Wang, Deying Xu, W-Ping Shanghai Univ Sci & Technol Sch Mat Sci & Engn Shanghai 201800 Peoples R China

Single stage and double-stage interrupted hot compression tests for simulating hot rolling have been carried out for a Ti-containing HSLA steel (10Ti). Physical simulation of hot rolling was in progress utilizing a Thermecmastor-Z simulator in 850-1150 degree C and strain rate of 0.1-60 s** minus **1. A model for residual strain ratio lambda was designed, and a model of flow stress considering residual strain has been obtained. The hot deformation behavior at various strain rate has also been studied. (Edited author abstract) 13 Refs.

关键词： Steel

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电头针治疗缺血性脑卒中的刺激参数研究概况

针刺研究 2024年第9期49卷 979-984页

作者：侯雨函杨絮柴慧包伟伟罗文君王金海兰州大学第二临床医学院兰州730030 甘肃中医药大学中西医结合学院兰州730000 兰州大学第二医院兰州730030

电头针作为治疗缺血性脑卒中的有效中医特色疗法,其刺激参数仍缺乏统一规范。本文从刺激频率、波形、强度、留针时间与疗程、介入时间窗5个方面归纳了电头针治疗缺血性脑卒中的参数研究概况。然而,这些参数因素并不是独立存在的,它们可... 详细信息

电头针作为治疗缺血性脑卒中的有效中医特色疗法,其刺激参数仍缺乏统一规范。本文从刺激频率、波形、强度、留针时间与疗程、介入时间窗5个方面归纳了电头针治疗缺血性脑卒中的参数研究概况。然而,这些参数因素并不是独立存在的,它们可以相互影响和相互作用,仅用单维分析很难观察到参数之间的相互作用。因此,未来还需要进行更多大样本量、具有严格的纳入和排除标准、更合理的研究设计及多层次效应分析的研究。

关键词：电头针缺血性脑卒中刺激参数综述

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Performance evaluation of microbial fuel cell for landfill leachate treatment: Research updates and synergistic effects of hybrid systems

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Journal of Environmental Sciences 2020年第10期32卷 1-20页

作者： Khaled Elmaadawy Bingchuan Liu Jingping Hu Huijie hou Jiakuan Yang School of Environmental Science and Engineering Huazhong University of Science and Technology(HUST)Wuhan 430074China Hubei Provincial Engineering Laboratory of Solid Waste Treatment Disposal and RecyclingWuhan 430074China State Key Laboratory of Coal Combustion Huazhong University of Science and Technology(HUST)Wuhan 430074China

Over half of century,sanitary landfill was and is still the most economical treatment strategy for solid waste disposal,but the environmental risks associated with the leachate have brought attention of scientists for its proper treatment to avoid surface and ground water *** of the treatment technologies are energy-negative and cost intensive processes,which are unable to meet current environmental *** are continuous demands of alternatives concomitant with positive energy and high effluent *** fuel cells(MFCs)were launched in the last two decades as a potential treatment technology with bioelectricity generation accompanied with simultaneous carbon and nutrient *** study reviews capability and mechanisms of carbon,nitrogen and phosphorous removal from landfill leachate through MFC technology,as well as summarizes and discusses the recent advances of standalone and hybrid MFCs performances in landfill leachate(LFL)*** improvements and synergetic effect of hybrid MFC technology upon the increasing of power densities,organic and nutrient removal,and future challenges were discussed in details.

关键词： Microbial fuel cells Landfill leachate Nutrient removal Single chamber microbial fuel cell Dual chamber microbial fuel cell Hybrid microbial fuel cell

Sedimentary features and sequence stratigraphy of the successions around the Carboniferous-Permian boundary in the Ordos Basin:links to glacial and volcanic impacts

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Journal of Palaeogeography 2023年第3期12卷 358-383页

作者： Zhong-Shuai hou Shi-Yue Chen Zhao Liang Hebei Key Laboratory of Strategic Critical Mineral Resources Hebei GEO UniversityShijiazhuang 050031China Interdisciplinary Science Research Institute Hebei GEO UniversityShijiazhuang 050031China School of Geosciences China University of PetroleumQingdao 266580China

The sedimentary successions around the Carboniferous-Permian boundary(CPB)in the Ordos Basin were investigated using extensive outcrop,borehole,well logging,thin section,and geochemistry data to study sedimentary and sequence stratigraphic responses to glaciation and volcanism in paleotropical transitional *** the studied interval,five distinct lithofacies have been identified,including bauxite,coal,and carbonaceous shale(No.8+9 coal seams),sandstone(Qiaotou),limestone(Baode),and mudstone,which can be classified into three lithofacies *** most complete lithofacies associ-ation is composed of bauxite,coal,carbonaceous shale,sandstone,limestone/mudstone or their combinations from the bottom to the top,while coal and carbonaceous shale,as well as sandstone,are absent locally,resulting in the formation of the other two types of lithofacies *** occurrence of bauxite in-dicates shelf exposure and weathering,the occurrence of coal and carbonaceous shale indicates swampiness of the shelf,and the occurrence of sandstone reveals river rejuvenation;all of these are thought to be sedimentary responses to the transcontinental glacier expansion in Gondwana around the *** presence of limestone and mudstone indicates carbonate platform and lagoon deposition,respectively,in the context of the earliest Asselian transgression caused by volcanism-induced glacier *** lithofacies associations record the regressive-transgressive cycles that occurred because of glaciation and volcanism near the *** top surface of bauxite can be used as a sequence boundary,while the lowstand systems tract consists of the No.8+9 coal seams and the Qiaotou sandstone,and the transgressive systems tract consists of the overlying Baode limestone and laterally equivalent *** lowstand systems tract,which contains source rock and hydrocarbon reservoirs,and the overlying transgressive systems tract,which serves as cap rock,form an excellent source-reservoi

关键词： Glaciation Volcanism Incised valley Sequence stratigraphy Ordos basin

Jackknife empirical likelihood test for the equality of degrees of freedom in t-copulas

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Science China Mathematics 2020年第4期63卷 789-822页

作者： Yanxi hou Deyuan Li Aiai Liu Liang Peng School of Data Science Fudan UniversityShanghai 200433China School of Management Fudan UniversityShanghai 200433China Department of Mathematics Tongji UniversityShanghai 200092China Department of Risk Management and Insurance Georgia State UniversityAtlantaGA 30303USA

It has been argued that fitting a t-copula to financial data is superior to a normal copula. To overcome the shortcoming that a t-copula only has one parameter for the degrees of freedom, the t-copula with multiple parameters of degrees of freedom has been proposed in the literature, which generalizes both the t-copulas and the grouped t-copulas. Like the inference for a t-copula, a computationally efficient inference procedure is to first estimate the correlation matrix via Kendall's τ and then to estimate the parameters of degrees of freedom via pseudo maximum likelihood estimation. This paper proposes a jackknife empirical likelihood test for testing the equality of some parameters of degrees of freedom based on this two-step inference procedure, and shows that the Wilks theorem holds.

关键词： jackknife empirical likelihood t-Copula

A bound on judicious bipartitions of directed graphs

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Science China Mathematics 2020年第2期63卷 297-308页

作者： Jianfeng hou Huawen Ma Xingxing Yu Xia Zhang Center for Discrete Mathematics and Theoretical Computer Science Fuzhou UniversityFuzhou 350116China School of Mathematics Georgia Institute of TechnologyAtlantaGA 30332USA School of Mathematics and Statistics Shandong Normal UniversityJinan 250014China

Judicious partitioning problems on graphs ask for partitions that bound several quantities simultaneously,which have received much attention ***(2005)asked the following natural question:What is the maximum constant cdsuch that every directed graph D with m arcs and minimum outdegree d admits a bipartition V(D)=V_1∪V_2 satisfying min{e(V_1,V_2),e(V_2,V_1)}cdm?Here,for i=1,2,e(V_i,V_(3-i))denotes the number of arcs in D from V_i to V_(3-i).Lee et al.(2016)conjectured that every directed graph D with m arcs and minimum outdegree at least d 2 admits a bipartition V(D)=V_1∪V_2 such that min{e(V_1,V_2),e(V_2,V_1)}≥((d-1)/(2(2 d-1))+o(1))*** this paper,we show that this conjecture holds under the additional natural condition that the minimum indegree is also at least d.

关键词： directed graph partition outdegree indegree tight component

住宅产业化背景下的高品质结构与装饰施工关键技术研究

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工程质量 2024年第6期42卷 107-110页

作者：杨毅后春风董鑫律五矿二十三冶建设集团有限公司湖南长沙410116

论文针对高层住宅标准化设计、施工快建体系、BIM技术、清水混凝土墙体施工技术、装配式技术、精装修可视化系统等,开展了综合性和系统性研究。

关键词：住宅施工品质装配式 BIM