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Relay Node Placement with Base Stations in Wireless Sensor Networks Fault-Tolerant

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Chinese Journal of Electronics 2014年第4期23卷 794-800页

作者： gao Zhipeng CHEN Kan qiu Xuesong State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

It has been proposed to deploy relay nodes for the sake of prolonging Wireless sensor networks(WSN)lifetime, such that sensors transmit the sensed data to them which in turn delivers the data to base stations. For survivability requirements, relay placements which considers fault tolerant ability have been noticed and studied. While related works are limited or most existing works don't take factors such as fault tolerance, or base stations into account comprehensively in two tired WSN. We focus on fault tolerant relay node placement in two-tiered heterogeneous WSN with base stations. As far as we know,fault tolerance contains two fundamental aspects, for one is multi-coverage and the second is multi-path. It is a NPhard problem and figure out an approximation, whose approximation ratio is enhanced to be(18 +). While a sub-problem approximation is also described as supplementary. Experimental results verify that the number of relay nodes deployed by our algorithm is somewhat superior to existed relay node placement solutions.

关键词： Relay node placement Wireless sensor networks Fault tolerant Connectivity Approximations ratio

77例耐多药肺结核患者采用含贝达喹啉方案治疗后肝损伤和QTc延长的临床分析

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临床肺科杂志 2021年第12期26卷 1886-1891页

作者：陈艳安琪林瑞陈雄李亮刘宇红高孟秋黄涛李鹏吴桂辉成都市中西医结合医院GCP办公室四川成都610066 成都市公共卫生临床医疗中心GCP办公室四川成都610066 首都医科大学附属北京胸科医院结核科北京101149 成都市公共卫生临床医疗中心结核科四川成都610066

目的通过分析含贝达喹啉方案对西南地区耐多药结核患者肝损伤和QTc间期的临床特征,探讨其发病的危险因素。方法我院纳入的符合条件的耐多药结核患者,给予含贝达喹啉的治疗方案,检测生化指标和QTc值。结果完成治疗的77例患者中,出现肝损... 详细信息

目的通过分析含贝达喹啉方案对西南地区耐多药结核患者肝损伤和QTc间期的临床特征,探讨其发病的危险因素。方法我院纳入的符合条件的耐多药结核患者,给予含贝达喹啉的治疗方案,检测生化指标和QTc值。结果完成治疗的77例患者中,出现肝损伤患者37例(48.1%),其中肝功能异常33例(42.9%),轻度肝损伤患者4例(5.2%)。38例(49.4%)发生QTc间期延长,其中450 ms≤QTc<500 ms患者30例(39.0%),QTc≥500 ms患者4例(5.2%),QTc≥60 ms患者28例(36.4%)。32~45岁和≥46岁的患者发生肝损伤的风险分别是18~31岁患者的3.11倍和7.90倍;合并肝炎患者发生肝损伤的风险是未合并肝炎患者的9.12倍。≥46岁的患者QTc间期延长发生风险是18~31岁患者的4.45倍;联合QTc延长的药物的患者QTc延长发生风险是未联合该类药物的4.10倍。结论含贝达喹啉方案引起的肝功能异常和QTc间期延长的比例较高,但是所有患者没有因为肝功能异常而停止使用贝达喹啉。年龄、合并肝炎是肝损伤发生的危险因素;年龄、联合QTc延长的药物是QTc延长发生的危险因素。在临床中,应密切关注具有以上高危因素患者的肝功能和心电图,及时采取措施,减少患者痛苦。

关键词：贝达喹啉结核耐药肝损伤 QTc延长

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Crustal density structures and isostasy beneath the Western North China craton,Trans-North China Orogen,and surrounding regions

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Geoscience Frontiers 2020年第2期11卷 569-580页

作者： Min gao Djordje Grujic qiu-Ming Cheng School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China State Key Lab of Geological Processes and Mineral Resources China University of GeosciencesBeijing 100083China Department of Earth Sciences Dalhousie UniversityHalifaxB3H 4R2Canada

To determine the lateral and vertical variations in crustal structure and their influence on the seismicity of the Western North China Craton,the Trans-North China Orogen,and the surrounding regions,the wavelet multi-scale structures,Moho depth,crustal density structures,and isostatic state are modelled using Bouguer gravity anomaly data,topography,and earthquake focal *** obtained homogeneous crustal densities and deviations of<1 km between the crustal thicknesses estimated from the isostatic model and those inverted from the Bouguer gravity anomalies in the Ordos Block,the Inner Mongolia Suture Zone,the Sichuan Basin,and the Jizhong *** results provide new evidence for relatively simple and stable continental crustal structures,and indicate that these regions will remain stable in both the vertical and lateral *** Hetao Graben,Yinchuan Graben,Weihe Basin,and Shanxi graben system have heterogeneous crustal densities and are isostatically *** contrast,the crust beneath the Yinshan Uplift,Lvliang Uplift,and northern and central Taihang Uplift is thin and *** heterogeneous crustal densities and non-isostatic state beneath the Tibetan Plateau and Qinling Central China Orogen indicate that these two blocks are unstable in the vertical and lateral *** Cenozoic deformation of the North China Craton is thought to be driven by lithospheric stresses related to the India-Eurasia collision and Pacific slab retreat in South East Asia,we suggest that gravitational potential energy created by the heterogeneous crustal structure modulates these first-order *** results of this study could constrain the causes of seismicity in systems surrounding the Ordos Block.

关键词： Western North China craton Trans-North China Orogen Bouguer gravity anomaly Crustal density structure Gravitational potential energy

血行播散性结核病并发骨髓增生异常综合征一例——文献复习及临床诊治过程分析

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中国防痨杂志 2018年第5期40卷 535-542页

作者：宋艳华齐荣艳马丽萍吕范永刘荣梅高孟秋首都医科大学附属北京胸科医院结核二科 101149 贵州省黔西南州人民医院感染科河北燕达陆道培医院血液科

血行播散性结核病是一种重症结核病，临床症状常不典型，影像学诊断报告也常常滞后，早期诊断困难。骨髓增生异常综合征（MDS）是一种恶性血液病，早期临床症状和血液系统异常表现一般不具有特异性。血行播散性结核病并发MDS常导致病情... 详细信息

血行播散性结核病是一种重症结核病，临床症状常不典型，影像学诊断报告也常常滞后，早期诊断困难。骨髓增生异常综合征（MDS）是一种恶性血液病，早期临床症状和血液系统异常表现一般不具有特异性。血行播散性结核病并发MDS常导致病情互相掩盖，易漏诊、误诊。笔者报道2017年4月首都医科大学附属北京胸科医院以“头晕、乏力3个月，发热2个月”收治入院的1例患者，初步诊断为血行播散性结核病并发全血细胞严重减少，早期经抗结核药物治疗后临床症状、肺部病变及血液系统表现均一度好转，但后期在肺部病变进一步好转的同时，血液系统异常却再次加重，最终经多次骨髓穿刺检查诊断为血行播散性结核病并发MDS。笔者希望通过对诊治过程的分析讨论，提高临床医生对两病并存的诊断认识，分享治疗经验。

关键词：结核肺骨髓增生异常综合征转诊及会诊结果与过程评价(卫生保健) 血行播散性结核病

Towards Practical Distributed Video Coding for Energy-Constrained Networks

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Chinese Journal of Electronics 2016年第1期25卷 121-130页

作者： CAO Yue gao Shaoshuai ZHANG Can qiu Gengfeng School of Electronic Electrical and Communication Engineering University of Chinese Academy of Sciences

Most of current distributed video codecs are developed based on the structure of Stanford scheme that employs channel coding like LDPC and Turbo ***, they need many times of iteration and feedback,which bring high decoding complexity and latency that make them less practical in energy-constrained *** this paper, a new distributed video codec based on modulo operation in the pixel domain is proposed, which only needs one feedback request and has a much lower decoding complexity. Mathematical proof of the equivalence between modulo operation and coset partition in the M-ary field is given, which means that the modulo operation in the M-ary field is a good substitute for channel codes in the distributed video coding systems. A system is built based on the proposed scheme. Simulation results show that the proposed scheme outperforms the state-of-the-art distributed video codecs with the decoding complexity as low as 1% to 10% of them.

关键词： Distributed video coding Modulo operation Coset codes Side information

A new methodology for the CFD uncertainty analysis

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Journal of Hydrodynamics 2013年第1期25卷 131-147页

作者： YAO Zhen-qiu SHEN Hong-cui gao Hui School of Naval Architecture and Ocean Engineering Jiangsu University of Science and Technology China Ship Scientific Research Center

With respect to the measurement uncertainty, this paper discusses the definition, the sources, the classification and the expressions of the CFD uncertainty. Based on the orthogonal design and the statistics inference theory, a new verification and validation method and the related procedures in the CFD simulation are developed. With the method, two examples of the CFD verification and validation are studied for the drag coefficient and the nominal wake fraction, and the calculation factors and their interactions which would significantly affect the simulation results are obtained. Moreover, the sizes of all uncertainty components resulting from the controlled and un-controlled calculation factors are determined, and the optimal combination of the calculation factors is obtained by an effect estimation in the orthogonal experiment design. It is shown that the new method can be used for the verification in the CFD uncertainty analysis, and can reasonably and definitely judge the credibility of the simulative result. As for CFD simulation of the drag coefficient and the nominal wake fraction, the results predicted can be validated. Although there is still some difference between the simulation results and the experiment results, its approximate level and credibility can be accepted.

关键词： CFD uncertainty verification validation

Photoexcitation induced magnetic phase transition and spin dynamics in antiferromagnetic MnPS_(3) monolayer

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npj Computational Materials 2023年第1期9卷 1246-1252页

作者： Yinlu gao Xue Jiang Zhiyong qiu Jijun Zhao State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology116024 DalianChina Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Dalian University of Technology)Ministry of Education116024 DalianChina Key Laboratory of Energy Materials and Devices(Liaoning Province) School of Materials Science and EngineeringDalian University of Technology116024 DalianChina

Antiferromagnetic spin dynamics is the key issue to develop spintronic *** adopt ab initio nonadiabatic molecular dynamics with spin–orbit-coupling(SOC)to investigate photoinduced spin dynamics in an antiferromagnetic semiconductor MnPS_(3) *** doping triggers MnPS_(3) from Néel antiferromagnetic to ferromagnetic phase at an experimentally achievable electron–hole pair density of 1.11×10^(14) cm−*** phase transition can be ascribed to the light-induced mid-gap states of S-p orbitals,which lower the electron excitation energy and strengthen the SOC effect between S-p and Mn-d *** excited S-p electrons first decay to the mid-gap states due to p–p electron–phonon-coupling and then relax to the spin-down Mn-d orbitals via *** a dramatic relaxation process prolongs the photogenerated carrier lifetime up to 648 fs,providing an explanation for the unusual optoelectronic performance of MnPS_(3).The reversible switching of magnetic order via optical means gives an important clue for information storage and highly efficient photocatalysts utilizing antiferromagnetic semiconductors.

关键词： dynamics excitation monolayer

Design method of organizational structure for MAVs and UAVs heterogeneous team with adjustable autonomy

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Journal of Systems Engineering and Electronics 2018年第2期29卷 286-295页

作者： CHEN Jun qiu Xunjie RONG Jia gao Xiaoguang School of Electronics and Information Northwestern Polytechnical University Centre of Applied Informatics College of Engineering and Science Victoria University

The increasingly complex battlefield environment requests much closer connection in a team having both manned and unmanned aerial vehicles(MAVs and UAVs). This special heterogeneous team structure causes demands for effective organizational structure design solutions. Implementing adjustable autonomy in the organizational structure, the expected evaluation function is established based on the physical resource, intelligent resource, network efficiency, network vulnerability and task execution reliability. According to the above constraints, together with interaction latency, decision-making information processing capacity, and decision-making latency, we aim to find a preferential organizational structure. The proposed organizational structure includes cooperative relationships, supervisory control relationships, and decision-making authorization relationships. In addition,by considering the influence on the intelligent support capabilities and the task execution reliability created by adjustable autonomy, it helps to build the proposed organizational structure designed with certain degree of flexibility to deal with the potential changes in the unpredictable battlefield environment. Simulation is conducted to confirm our design to be valid. And the method is still valid under different battlefield environments and interventions.

关键词： organizational structure cooperative relationship supervisory control relationship decision-making authorization relationship adjustable autonomy

Decomposition Method of Complex Optimization Model Based on Global Sensitivity Analysis

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Chinese Journal of Mechanical Engineering 2014年第4期27卷 722-729页

作者： qiu Qingying LI Bing FENG Peien gao Yu State Key Laboratory of CAD&CG Zhejiang University

The current research of the decomposition methods of complex optimization model is mostly based on the principle of disciplines, problems or components. However, numerous coupling variables will appear among the sub-models decomposed, thereby make the efficiency of decomposed optimization low and the effect poor. Though some collaborative optimization methods are proposed to process the coupling variables, there lacks the original strategy planning to reduce the coupling degree among the decomposed sub-models when we start decomposing a complex optimization model. Therefore, this paper proposes a decomposition method based on the global sensitivity information. In this method, the complex optimization model is decomposed based on the principle of minimizing the sensitivity sum between the design functions and design variables among different sub-models. The design functions and design variables, which are sensitive to each other, will be assigned to the same sub-models as much as possible to reduce the impacts to other sub-models caused by the changing of coupling variables in one sub-model. Two different collaborative optimization models of a gear reducer are built up separately in the multidisciplinary design optimization software iSIGHT, the optimized results turned out that the decomposition method proposed in this paper has less analysis times and increases the computational efficiency by 29.6%. This new decomposition method is also successfully applied in the complex optimization problem of hydraulic excavator working devices, which shows the proposed research can reduce the mutual coupling degree between sub-models. This research proposes a decomposition method based on the global sensitivity information, which makes the linkages least among sub-models after decomposition, and provides reference for decomposing complex optimization models and has practical engineering significance.

关键词： multidisciplinary design optimization collaborative optimization sensitivity analysis coupled factorization iSIGHT