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基于模式匹配及BLT方程的腔体内场线耦合计算方法研究

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电子与信息学报 2017年第8期39卷 2014-2018页

作者：任丹杜平安陈珂肖培 michelson g David 电子科技大学机械电子工程学院成都611731 英属哥伦比亚大学电气与信息工程学院

金属腔体内的场线耦合是电磁兼容领域的一个重要的问题,基于模式匹配及BLT方程理论,该文提出一种计算带孔阵腔体内场线耦合的方法。将外部激励源对腔体内传输线的耦合分解为孔腔耦合和场线耦合两个过程,腔体内任意点的场强由模式匹配理... 详细信息

金属腔体内的场线耦合是电磁兼容领域的一个重要的问题,基于模式匹配及BLT方程理论,该文提出一种计算带孔阵腔体内场线耦合的方法。将外部激励源对腔体内传输线的耦合分解为孔腔耦合和场线耦合两个过程,腔体内任意点的场强由模式匹配理论及矩量法计算得到,腔体内的场线耦合由Agrawal模型构建BLT方程进行计算。与测试数据对比得出,模式匹配理论可以准确计算腔体内部电磁场。与CST数值仿真数据对比得到,该方法可以准确计算任意入射波激励下线缆终端负载上的电流响应且计算效率高,可用于腔体内场线耦合的研究。

关键词：模式匹配 BLT方程孔腔耦合场线耦合

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瞳孔测定可以改良糖尿病自主神经病变的诊断

世界核心医学期刊文摘（眼科学分册） 2005年第1期1卷 5-6页

作者：肖颖 D utsch M Marthol H michelson g M.J.Hilz Department of Neurolog y Univ ersity of Erlang en Nuremberg Schwabachanla g e 691054Er-lang enGermany

Although diabetic autonomic neurop athy involves most or-gans,diagnosis is largely based on c ardiovascular *** reflex pupillography(LRP)non-invasively evaluates pupillary autonomic *** te sted whether LRP demonstrates autonomic pupillary d ysfunction in diabetics independently from cardiac autonom ic neuropathy(CAN)or peripheral neuropathy(PN).In 36type -II diabetics(39-84years)and 36controls(35-78years),we per-formed *** determined diameter(PD),early and late redilation velocities(DV)as sympathetic parameters and reflex amplitude(RA)and constriction velocity(CV)as parasympathetic pupillary indic *** assessed the frequency of CAN using heart rate variability tests and e-valuated the frequency of PN using neurological examina-tion,nerve conduction studies,thermal and vibratory threshold ***-e ight (77.8%)patients had abnormal pupillography results,but only 20patients(56%)had signs of PN or *** nine patient s with PN,only pupillography identified auto nomic *** patients had pupillary dysfunction but no CAN or *** comparison to controls,patients had reduced PD,late DV,RA and CV indicating sympathetic and parasympathetic *** incidence and seve rity of pupillary ab-normalities did not differ between p atients with and without CAN or *** demonstrates sympathetic and parasym-pathetic pupillary dysfunction ind ependently from PN or CAN and thus refines the diagnosis of autonomic neuropa-thy in type -II diabetics.

关键词：自主神经病变神经传导植物神经病变心血管系统无创性评价对照组人群神经学测试评价光反射

视网膜血管的远程医疗筛查技术(“能说话的眼”)

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世界核心医学期刊文摘（眼科学分册） 2005年第9期1卷 37-38页

作者： michelson g. groh M. groh M.J.M. 张少娟 Augenklinik mit Poliklinik Universit¨at Erlangen-N¨urnberg Schwabachanlage 6 91054 Erlangen Germany Dr.

Background: Cerebral and retinal vessels behave similarly under the influence of vascular risk factors. Several groups have shown that retinal microvascular abnormalities represent an independent risk factor with regard to strokes and heart attacks. Aim of the Study: The aim of this study was to perform a prospective screening examinationwith regard to retinalmicrovascular abnormalities as well as an extended vessel diagnosis in a subgroup of patients with lower arteriovenous risk values. Methods: In the course of a prospective cross-sectional study (“Talking Eyes”) between 1.9.2001 and 1.8.2002 a telemedical-supported screening of the retina (study 1) was carried out in 7,163 subjects. The patients were selected without any inclusion or exclusion criteria. The mean age was 48.2±8 years (18-83 years) with a sex distribution of 39.2%females to 60.8%males. Digital fundus photos of the right and left eyes were taken for all patients. The pictures were taken without pupil dilation using a CANON-NM camera. The pictures and case histories were stored in a central server using web-based software (MedStage, Siemens). In a central reading centre, the arteriovenous ratio of both eyes was determined telemedically using the Parr-Hubbard formula and the retinas subjected to a standardised examination by an ophthalmologist. The retinal risk factor was calculated on the basis of the arteriovenous ration, the presence of microvascular abnormalities and the case history. The reproducibility of measurement of the arteriovenous ratio (Kronbach alpha coefficient) was evaluated by double measurements on 1,332 images. In a subgroup of study 1 with arteriovenous ratio values gnosis with measurement of 24-h blood pressure and vessel-relevant blood values (homocysteine, cholesterol, LDL, HDL, CRP, Tg, HbA1c) was carried out (study II). Results: Study 1: The Kronbach alpha coefficient as a measure of reproducibility amounted to 0.77. The mean arterioveno

关键词：视网膜血管筛查技术远程医疗动静脉比视网膜微血管视网膜出血舒张期血压动静脉交叉征视网膜检查血压测定

An SPH Framework for Earthquake-Induced Liquefaction Hazard Assessment of geotechnical Structures

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 251-277页

作者： Sourabh Mhaski g.V.Ramana Department of Civil Engineering Indian Institute of Technology DelhiNew Delhi110016India

Earthquake-induced soil liquefaction poses significant risks to the stability of geotechnical structures *** understanding of the liquefaction triggering,and the post-failure large deformation behaviour is essential for designing resilient *** present study develops a Smoothed Particle Hydrodynamics(SPH)framework for earthquake-induced liquefaction hazard assessment of geotechnical *** coupled flowdeformation behaviour of soils subjected to cyclic loading is described using the PM4Sand model implemented in a three-phase,single-layer SPH framework.A staggered discretisation scheme based on the stress particle SPH approach is adopted to minimise numerical inaccuracies caused by zero-energy modes and tensile ***,non-reflecting boundary conditions for seismic analysis of semi-infinite soil domains using the SPH method are *** numerical framework is employed for the analysis of cyclic direct simple shear test,seismic analysis of a level ground site,and liquefaction-induced failure of the Lower San Fernando *** agreement for liquefaction triggering and post-failure behaviour demonstrates that the SPH framework can be utilised to assess the effect of seismic loading on field-scale geotechnical *** present study also serves as the basis for future advancements of the SPH method for applications related to earthquake geotechnical engineering.

关键词： Earthquake seismic liquefaction stress particle PM4Sand smoothed particle hydrodynamics(SPH)

正常人与开角型青光眼患者的视网膜血管内氧饱和度的差异

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世界核心医学期刊文摘（眼科学分册） 2006年第9期2卷 46-46页

作者： michelson g. Scibor M. 王文军(译) Schwabachanlage 6 D-91054 Erlangen Germany 不详

Purpose:To measure the oxygen saturation(SO2)in retinal arterioles and venules in patients with glaucomatous optic ***:We examined SO2 in retinal arterioles and venules simultaneously by imaging *** saturationwas evaluated according to the difference of the extinction spectra of haemoglobin and *** arterio-venous difference(avD)was calculated by(SO2art-SO2ven).The optic nerve head topography was estimated by Heidelberg retinal tomography and the visual field using the Octopus *** examined one eye in each of 58 healthy persons(mean age 58.6 ± 10.7 years;mean rim area 1.52± 0.33mm2;mean defect 0.65± 1.31 dB;mean intraocular pressure IOP 18.5± 2.7 mmHg),49 patients with normal-tension primary open-angle glaucoma(NTg)(mean age 63.0± 8.5 years;mean rim area 0.89± 0.34 mm2;mean defect 5.4± 4.1dB;mean IOP 19.2± 2.9 mmHg),and 45 patients with high-tension primary open-angle glaucoma(POAg)(mean age 62.6± 10.3 years;mean rim area 0.97± 0.47 mm2;mean defect 7.1± 6.4 dB;mean IOP 31.6± 10.8 mmHg).Results:The intraclass correlation coefficients of the SO2 measurement were 0.82(arteriole)and 0.59(venule).In normal eyes,the SO2art,SO2ven and avD were 92.3± 3.4%,55.7 ± 6.8% and 36.6± 7.0%,*** data were 89.7± 5.4%,56.0± 8.3% and 33.7± 10.6%,respectively,in NTg eyes and 91.4± 4.0%,58.3± 10.5% and 33.1± 11.5%,respectively,in POAg *** all examined eyes,the arteriolar SO2 and the retinal arterio-venous difference correlated significantly with the rim ***:Eyes with NTg showed significantly decreased arteriolar *** changes were not seen in POAg patients.

关键词：正常眼压青光眼患者原发性开角型青光眼视网膜动静脉动脉氧饱和度血管内正常人青光眼性视神经病变平均年龄

Stepping up after spinal cord injury:negotiating an obstacle during walking

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Neural Regeneration Research 2025年第7期20卷 1919-1929页

作者： Alain Frigon Charly g.Lecomte Department of Pharmacology-Physiology Faculty of Medicine and Health SciencesUniversitéde SherbrookeCentre de recherche du Centre Hospitalier Universitaire de SherbrookeSherbrookeQCCanada

Every day walking consists of frequent voluntary modifications in the gait pattern to negotiate *** spinal cord injury,stepping over an obstacle becomes *** over an obstacle requires sensorimotor transformations in several structures of the brain,including the parietal cortex,premotor cortex,and motor *** information and planning are transformed into motor commands,which are sent from the motor cortex to spinal neuronal circuits to alter limb trajectory,coordinate the limbs,and maintain *** spinal cord injury,bidirectional communication between the brain and spinal cord is disrupted and animals,including humans,fail to voluntarily modify limb trajectory to step over an ***,in this review,we discuss the neuromechanical control of stepping over an obstacle,why it fails after spinal cord injury,and how it recovers to a certain extent.

关键词： biomechanics locomotion neurophysiology obstacle negotiation spinal cord injury

Projective Hilbert modules and sequential approximations

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Science China Mathematics 2025年第1期 137-168页

作者： Lawrence g.Brown Huaxin Lin Department of Mathematics Purdue University Department of Mathematics East China Normal University Department of Mathematics University of Oregon Shanghai Institute for Mathematics and Interdisciplinary Sciences

We show that when A is a separable C*-algebra,every countably generated Hilbert A-module is projective（with bounded module maps as morphisms）.We also study the approximate extensions of bounded module *** the case where A is a σ-unital simple C*-algebra with strict comparison,and every strictly positive lower semicontinuous affine function on quasitraces can be realized as the rank of an element in the Cuntz semigroup,we show that the Cuntz semigroup is equivalent to unitarily equivalent classes of countably generated Hilbert A-modules if and only if A has stable rank one.

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Bioelectronic medicine in modulation of cortical spreading depolarization and beyond

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Neural Regeneration Research 2025年第2期20卷 481-482页

作者： Khaled Alok Timothy g.White Chunyan Li Department of Neurosurgery Donald and Barbara Zucker School of Medicine at Hofstra/NorthwellHempsteadNYUSA Translational Brain Research Laboratory The Feinstein Institutes for Medical ResearchManhassetNYUSA

Bioelectronic interventions,specifically trigeminal nerve st imulat ion(TNS),have attracted considerable attention in conditions where cortical spreading depolarizations(CSDs)accompanied by compromised cerebral perfusion may exacerbate neurological *** pharmacological interventions have demonstrated initial potential in addressing CSDs,a standardized treatment approach has not yet been *** objective of this perspective is to explore emerging bioelectronic methodologies for addressing CSDs,particularly emphasizing TNS,and to underscore TNS’s capacity to enhance neurovascular coupling and cerebral perfusion.

关键词： cerebral perfusion electronic

Impact of Zika virus non-structural protein mutations on hippocampal damage

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Neural Regeneration Research 2025年第8期20卷 2307-2308页

作者： Larissa M.g.Cassiano Roney S.Coimbra Neurogenômica/Imunopatologia Instituto RenéRachouFiocruzBelo HorizonteBrazil Departamento de Bioquímica e Imunologia Instituto de Ciências BiológicasUniversidade Federal de Minas GeraisBelo HorizonteBrazil

The Zika virus(ZIKV),a member of the Flaviviridae family,attracted worldwide attention for its connection to severe neurological effects,notably microcephaly in newborns,first reported during the 2015 epidemic in ***,its impact goes beyond fetal and neonatal abnormalities,also affecting the central nervous system(CNS)in both children and adults,leading to enduring cognitive and behavioral impairments.

关键词： damage fetal neonatal