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A Comparison between the Metric Dimension and Zero Forcing Number of Trees and Unicyclic Graphs

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Acta Mathematica Sinica,English Series 2017年第6期33卷 731-747页

作者： linda EROH Cong X.KANG Eunjeong YI University of Wisconsin Oshkosh Oshkosh WI 54901 USA Texas A & M University at Galveston Galveston TX 77553 USA

The metric dimension dim（G） of a graph G is the minimum number of vertices such that every vertex of G is uniquely determined by its vector of distances to the chosen vertices. The zero forcing number Z（G） of a graph G is the minimum eardinality of a set S of black vertices （whereas vertices in V（G）／S are colored white） such that V（G） is turned black after finitely many applications of ＂the color-change rule＂： a white vertex is converted black if it is the only white neighbor of a black vertex. We show that dim（T） ≤Z（T） for a tree T, and that dim（G）≤Z（G）＋I if G is a unicyclic graph; along the way, we characterize trees T attaining dim（T） = Z（T）. For a general graph G, we introduce the ＂cycle rank conjecture＂. We conclude with a proof of dim（T） - 2 ≤ dim（T ＋ e） ≤dim（T）＋ 1 for e∈ E（T）.

关键词： Distance resolving set metric dimension zero forcing set zero forcing number tree,unicyclic graph cycle rank

Closed 3-stop Center and Periphery in Graphs

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Acta Mathematica Sinica,English Series 2012年第3期28卷 439-452页

作者： linda EROH Ralucca GERA Steven J. WINTERS Department of Mathematics University of Wisconsin Oshkosh Department of Applied Mathematics Naval Postgraduate School

A delivery person must leave the central location of the business, deliver packages at a number of addresses, and then return. Naturally, he/she wishes to reduce costs by finding the most efficient route. This motivates the following： Given a set of k distinct vertices S = {x1, x2,..., xk } in a simple graph G, the closed k-stop-distance of set S is defined to be

关键词： Central appendage number peripheral appendage number Steiner distance

Hydrothermal Origin of Early Permian Chert Nodules in the Central North China Craton Linked to Northern Margin Cratonic Activation

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Acta Geologica Sinica(English Edition) 2021年第2期95卷 541-557页

作者： YAO Xu LI Su ZHOU Yaoqi linda A.HINNOV School of Earth Sciences Lanzhou UniversityLanzhou 73000China Key Laboratory of Mineral Resources in Western China(Gansu Province) Lanzhou UniversityLanzhou 730000China School of Geosciences China University of PetroleumQingdaoShandong 266580China Department of Atmosphere Ocean and Earth SciencesGeorge Mason UniversityFairfaxVirginia 22030USA

Sedimentary chert phases from the Archean to the present are widely used to trace sedimentary environments and tectonic ***,chert nodules occurring within carbonates have been the subject of possible hydrothermal or biogenic origin,in lieu of a diagenetic ***,chert nodules from a vast cratonic basin represent extremely rich silica accumulations but less noted is how they respond to submarine hydrothermal activity(and/or surface siliceous organism productivity).The links between the cratonic-type chert depositions and environmental changes regarding cratonic evolution need to be revisited at a large temporal-spatial *** chert nodules are widespread throughout the Lower Permian Taiyuan Formation in the North China Craton(NCC).Several Taiyuan chert-rich successions across the NCC have been selected to study possible links between chert deposition and cratonic evolution in scenario of partial cratonic activation of the northern NCC margin during the Late *** on stratigraphic correlation,the chert nodules are ubiquitously,evenly distributed throughout the Taiyuan Formation at a large craton-basin scale from the northern to southern interior *** results,elemental abundances,together with silicon and oxygen isotopic compositions of chert samples infer significant hydrothermal contributions for the silica ***,the cratonic-scale chert depositions of hydrothermal origin infer a giant and remote silica reservoir,linking to the large igneous province and magmatism in the NCC northern *** Taiyuan chert nodules could be unique marine sedimentary archives recording the Late Paleozoic NCC partial activation,which also generated continental records of igneous rocks,bauxites and *** strong tectonics of the northern margin,south-dipping topography and northward transgression of the Early Permian NCC facilitated the chert deposition on the shallow marine platform in the cratonic interior.

关键词： chert silicification silicon and oxygen isotopes hydrothermal scenarios partial activation North China Craton

Abiotic stress-triggered oxidative challenges:Where does H_(2)S act?

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Journal of Genetics and Genomics 2022年第8期49卷 748-755页

作者： linda de Bont Xiujie Mu Bo Wei Yi Han National Engineering Laboratory of Crop Stress Resistance Breeding School of Life SciencesAnhui Agricultural UniversityHefeiAnhui 230036China Universite de Lorraine INRAEIAMF-54000 NancyFrance School of Food and Biological Engineering Hefei University of TechnologyHefeiAnhui 230009China School of Biology Food and EnvironmentHefei UniversityHefeiAnhui 230601China

Hydrogen sulfide(H_(2)S)was once principally considered the perpetrator of plant growth cessation and cell ***,this has become an antiquated view,with cumulative evidence showing that the H_(2)S serves as a biological signaling molecule notably involved in abiotic stress response and adaptation,such as defense by phytohormone activation,stomatal movement,gene reprogramming,and plant growth *** oxygen species(ROS)-dependent oxidative stress is involved in these ***,an ever-growing body of evidence indicates that H_(2)S can directly interact with ROS processing systems in a redox-dependent manner,while it has been gradually recognized that H_(2)S-based posttranslational modifications of key protein cysteine residues determine stress ***,the reciprocal interplay between H_(2)S and nitric oxide(NO)in regulating oxidative stress has significant *** interaction of H_(2)S with NO and ROS during acclimation to abiotic stress may vary from synergism to ***,the molecular pathways and factors involved remain to be *** review not only aims to provide updated information on H_(2)S action in regulating ROS-dependent redox homeostasis and signaling,but also discusses the mechanisms of H_(2)S-dependent regulation in the context of oxidative stress elicited by environmental cues.

关键词： Hydrogen sulfide Oxidative stress ROS Nitric oxide Redox signaling

基于等效短路试验的变压器用层压垫块累积效应

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中国电机工程学报 2024年第11期44卷 4535-4543,I0031页

作者：徐征宇李鹏李林达隋华泽汪佐宪赵志刚张书琦汪可中国电力科学研究院有限公司北京市海淀区100192 广州西门子能源变压器有限公司广东省广州市510530

层压垫块是油浸式变压器线圈轴向支撑结构的关键材料之一,多次短路条件下变压器层压垫块的累积效应规律尚不清晰。该文提出适用层压垫块的多次短路等效试验方法,可模拟暂态分量为50 Hz的动态短路力,突破材料尺度上静态试验的局限;试验... 详细信息

层压垫块是油浸式变压器线圈轴向支撑结构的关键材料之一,多次短路条件下变压器层压垫块的累积效应规律尚不清晰。该文提出适用层压垫块的多次短路等效试验方法,可模拟暂态分量为50 Hz的动态短路力,突破材料尺度上静态试验的局限;试验获得层压垫块在不同短路力大小、老化程度、短路类型和短路次数等条件下塑性形变的变化规律。结果表明:塑性形变与短路力大小有正相关关系并随着短路次数增加呈饱和特性;塑性形变与间隔类型的相互关系并不明显;根据老化15年层压垫块塑性形变规律,将累积效应划分为形变上升、稳定和快速累积3个阶段,老化和力联合作用下层压垫块纤维状态是发生不同累积特点的直接原因;层压垫块弹性模量与短路力呈非线性相互关系。进一步提出变压器轴向预紧力损失计算方法,实例计算表明,多次短路后各线圈轴向预紧力发生下降或再分配现象。研究结论为深入掌握多次短路累积效应对变压器的影响提供一定的技术支撑。

关键词：多次短路层压垫块塑性形变饱和特性轴向预紧力

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Surveillance of hepatocellular cancer—why can’t we do better?

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Hepatobiliary Surgery and Nutrition 2019年第6期8卷 662-663页

作者： linda L.Wong Department of Surgery John A.Burns School of MedicineUniversity of HawaiiHonoluluHIUSA

Hepatocellular carcinoma(HCC)has become a priority because of high case fatality and increasing incidence,especially in the United *** the best curative therapies are liver resection and transplantation,the Holy Grail of HCC is early *** smaller tumors allows for surgical intervention with better outcome and also allows time to wait for precious donor livers.

关键词： liver curative hepatocellular

A WKNN-based approach for NB-IoT sensors localization

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Digital Communications and Networks 2023年第1期9卷 175-182页

作者： Ennio Gambi linda Senigagliesi Andrea Barbaresi Matteo Mellini Adelmo De Santis Department of Information Engineering Universita Politecnica delle Marche60131AnconaItaly TIM S.p.A.-Business-Pre Sales Engineer 60100AnconaItaly

With the recent introduction of NarrowBand Internet of Things(NB-IoT)technology in the 4th and 5th generations of mobile radio networks,the mobile communications context opens up significantly to the world of *** means of NB-IoT,the mobile systems within 3GPP standardization introduce the peculiar functions of sensor networks,thus making it possible to satisfy very specific requirements with respect to those which characterize traditional mobile *** the functions of interest for sensor networks,the possibility of locating the positions of the sensors without an increase in costs and energy consumption of the sensor nodes is of utmost *** present work describes a procedure for locating the NB-IoT nodes based on the quality of radio signals received by the mobile terminals,which therefore does not require further hardware implementations on board the *** procedure,based on the RF fingerprinting technique and on machine learning processing,has been tested experimentally and has achieved interesting performances.

关键词： Narrowband Internet of Things(NB-IoT) Sensor localization Sensor networks RF fingerprint Positioning LTE

Urban planning historical review of master plans and the way towards a sustainable city:Dar es Salaam,Tanzania

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Frontiers of Architectural Research 2019年第3期8卷 359-377页

作者： linda Lazaro Peter Yuzhen Yang Faculty of Architecture and Urban Planning Chongqing UniversityChongqingChina

Urban planning in Tanzania has focused mainly on economic *** Tanzanian government prioritizes large-scale modern projects to increase national income and propel world-class urban *** es Salaam,Tanzania's largest city and main commercial center has experienced remarkable urban ***,its growth has not been consistent with the master plans,which also overlook sustainable urban development *** high urbanization rate has exacerbated the degradation of the city's environment,including roadside air quality,solid waste,and water *** city's ongoing environmental dilapidation has led to a call for a sustainable urbanization to curb past urbanization problems and implement a sustainable *** work reviews Dar es Salaam's available planning documents and examines how master plans can stimulate sustainable urban *** suggest that master plans should not be used as a mere urban growth control *** plans that are designed and conceptualized as a comprehensive strategy and integrated with different aspects of urban development can play a key role in enforcing sustainable urban development for the city.

关键词： Urbanization Urban planning Master plan Sustainable urban development Dares Salaam

Modulation of liver tolerance by conventional and nonconventional antigen-presenting cells and regulatory immune cells

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Cellular & Molecular Immunology 2016年第3期13卷 277-292页

作者： Andrea Kristina Horst Katrin Neumann linda Diehl Gisa Tiegs Institute of Experimental Immunology and Hepatology Center for Experimental Medicine University Medical Center Hamburg-Eppendorf Martinistrasse 52Hamburg D-20246 Germany

The liver is a tolerogenic organ with exquisite mechanisms of immune regulation that ensure upkeep of local and systemic immune tolerance to self and foreign antigens, but that is also able to mount effective immune responses against pathogens. The immune privilege of liver allografts was recognized first in pigs in spite of major histo-compatibility complex mismatch, and termed the ＂liver tolerance effect＂. Furthermore, liver transplants are spontaneously accepted with only low-dose immunosuppression, and induce tolerance for non-hepatic co-transplanted allografts of the same donor. Although this immunotolerogenic environment is favorable in the setting of organ transplantation, it is detrimental in chronic infectious liver diseases like hepatitis B or C, malaria, schistosomiasis or tumorigenesis, leading to pathogen persistence and weak anti-tumor effects. The liver is a primary site of T-cell activation, but it elicits poor or incomplete activation of T cells, leading to their abortive activation, exhaustion, suppression of their effector function and early death. This is exploited by pathogens and can impair pathogen control and clearance or allow tumor growth. Hepatic priming of T cells is mediated by a number of local conventional and nonconventional antigen-presenting cells （APCs）, which promote tolerance by immune deviation, induction of T-cell anergy or apoptosis, and generating and expanding regulatory T cells. This review will focus on the communication between classical and nonclassical APCs and lymphocytes in the liver in tolerance induction and will discuss recent insights into the role of innate lymphocytes in this process.

关键词： innate immunity liver tolerance nonconventional