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China Communications 2018年第6期15卷 1-17页

作者： Xiangming Meng Sheng Wu michael riis andersen Jiang Zhu Zuyao Ni Huawei Technologies Co.Ltd. Shanghai 201206China Tsinghua Space Center Tsinghua UniversityBeijing 100084China Department of Computer Science Aalto University P.O.Box 15400FI-00076Finland Ocean College Zhejiang UniversityZhoushan 316021China

Due to limited volume, weight and power consumption, micro-satellite has to reduce data transmission and storage capacity by image compression when performs earth observation missions. However, the quality of images may be unsatisfied. This paper considers the problem of recovering sparse signals by exploiting their unknown sparsity pattern. To model structured sparsity, the prior correlation of the support is encoded by imposing a transformed Gaussian process on the spike and slab probabilities. Then, an efficient approximate message-passing algorithm with structured spike and slab prior is derived for posterior inference, which, combined with a fast direct method, reduces the computational complexity significantly. Further, a unified scheme is developed to learn the hyperparameters using expectation maximization(EM) and Bethe free energy optimization. Simulation results on both synthetic and real data demonstrate the superiority of the proposed algorithm.

关键词： compressed sensing structuredsparsity spike and slab prior approximate message passing expectation propagation

Hard-thermal-loop QED thermodynamics

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Chinese Physics C 2010年第9期34卷 1527-1529页

作者：苏楠 Jens O.andersen michael Strickland Frankfurt Institute for Advanced Studies Department of Physics Norwegian University of Science and Technology Department of Physics Gettysburg College

The weak-coupling expansion for thermodynamic quantities in thermal field theories is poorly convergent unless the coupling constant is *** discuss the calculation of the free energy for a hot gas of electrons and photons to three-loop order using hard-thermal-loop perturbation theory （HTLpt）.We show that the hard-thermal-loop perturbation reorganization improves the convergence of the successive approximations to the QED free energy at large coupling,e ～ *** reorganization is gauge invariant by construction,and due to the cancellations among various contributions,we obtain a completely analytic result for the resummed thermodynamic potential at three loops.

关键词： resummation hard-thermal-loop thermal field theory QED free Energy

Elastohydrodynamic lubrication and wear modelling of the knee joint replacements with surface topography

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Biosurface and Biotribology 2018年第1期4卷 18-23页

作者： Leiming Gao Zikai Hua Robert Hewson michael Skipper andersen Zhongmin Jin Department of Aeronautics lmperial College LondonLondonUK School of Mechatronics Engineering and Automation Shanghai UniversityShanghaiPeople's Republic of China Department of Materials and Production Aalborg University9100 AalborgDenmark Southwest Jiaotong University ChengduPeople's Republic of China Tribology Research Ilnstitute School of Mechanical EngineeringUniversity of LeedsLeedsUK

This numerical study predicted wear of lubricated total knee replacements with the existing of textured surfaceand the possibility of surface designs to reduce *** the first part,a wear model of metal-on-polyethylene total kneereplacement was *** medial and lateral knee compartments was accounted for separately,with the contactforce and motion during walking cycles *** adapted Archard wear formula was employed where the wearfactor was an exponential function of the'Lambda ratio'(film thickness to the average roughness).Wear of the softbearing surface(polyethylene insert)was simulated with regularly geometry update until a steady-state wear *** the second part,the effect of surface topography of the knee replacements was *** surface texturingtechniques have shown promising benefit to machine components in many areas of engineering *** textureparameters were designed using the Taguchi method for the geometry,size,and distribution of the micro *** observed that the lateral compartment may benefit from surface texturing if dimples were properly designed,while the texturing showed hardly advantageous effect on the medial surface in terms of lubrication enhancement andwear *** results were presented in the 6th World Tribology Conference.

关键词： wear surface lubrication

First attempt to produce experimental Campylobacter concisus infection in mice

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World Journal of Gastroenterology 2008年第45期14卷 6954-6959页

作者： Rune Aabenhus Unne Stenram Leif Percival andersen Henrik Permin sa Ljungh Department of Clinical Microbiology National University Hospital (Rigshospitalet) Department of Pathology University of Lund Department of Infectious Control and Prevention National University Hospital (Rigshospitalet) Department of Internal Medicine Bispebjerg Hospital Department of Medical Microbiology Dermatology and Infection Lund University

AIM： TO infect mice with atypical Campylobacter concisus （C. concisus） for the first time. METHODS： Three separate experiments were conducted in order to screen the ability of five clinical C. concisus isolates of intestinal origin and the ATCC 33237 type strain of oral origin to colonize and produce infection in immunocompetent BALB/cA mice. The majority of the BALB/cA mice were treated with cyclophosphamide prior to C. concisus inoculation to suppress immune functions. Inoculation of C. conc/sus was performed by the gastric route. RESULTS： C. concisus was isolated from the liver, ileum and jejunum of cyclophosphamide-treated mice in the first experiment. No C. concisus strains were isolated in the two subsequent experiments. Mice infected with C. concisus showed a significant loss of body weight from day two through to day five of infection but this decreased at the end of the first week. Histopathological examination did not consistently find signs of inflammation in the gut, but occasionally microabscesses were found in the liver of infected animals. CONCLUSION： Transient colonization with C. concisus was observed in mice with loss of body weight. Future studies should concentrate on the first few days after inoculation and in other strains of mice.

关键词： Animal model BALB/cA mice Campylobacter concisus Colonization Infection

Cardiac Structure and Function in Men with Prostate Cancer Receiving Androgen-Deprivation Therapy and the Effects of Recreational Small-Sided Football Training:A Randomized Controlled Trial

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World Journal of Cardiovascular Diseases 2017年第9期7卷 308-322页

作者： Jakob Friis Schmidt Lars Juel andersen Jacob Uth Therese Hornstrup Jesper Christensen Julie Midtgaard Klaus Brasso Peter Krustrup Mikael Rorth Peter riis Hansen Department of Cardiology Copenhagen University HospitalGentofteDenmark Department of Nutrition Exercise and SportsCentre for Team Sport and HealthUniversity of CopenhagenCopenhagenDenmark Department of Cardiology Roskilde HospitalRoskildeDenmark The University Hospitals Centre for Health Care Research(UCSF) Copenhagen University HospitalRigshospitaletDenmark Department of Public Health University of CopenhagenCopenhagenDenmark Copenhagen Prostate Cancer Center Department of UrologyCopenhagen University HospitalRigshospitaletDenmark Sport and Health Sciences University of ExeterExeterGreat Britain Department of Sports Science and Clinical Biomechanics SDU Sport and Health Sciences Cluster(SHSC)University of Southern DenmarkOdenseDenmark Department of Oncology Copenhagen University HospitalRigshospitaletDenmark

Purpose: Androgen deprivation therapy (ADT) is a cornerstone in prostate cancer (PCa) management that prolongs PCa-free and overall survival, but effects of ADT on human cardiac function have not been investigated. We used echocardiography to examine cardiac structure and function in patients with prostate cancer receiving ADT and to determine whether an exercise intervention can elicit cardiac adaptations in these subjects. Methods: Forty-three patients with prostate cancer receiving ADT were randomized to 12 weeks football training (ST group;n = 20) or usual care (control [CO] group;n = 23). Cardiac function was assessed at baseline and after 12 weeks by comprehensive echocardiography. Peak oxygen consumption, blood pressure and peripheral microvascular function was also measured. Results: At baseline, no considerable echocardiographic abnormalities were observed. In the ST group, increases in left ventricular diastolic function variables including E/A ratio (P = 0.03), E’ (P = 0.016), E’TDIcolor (P = 0.040) and in left atrial diameter (P = 0.001) were observed after 12 weeks. In addition, diastolic blood pressure (P = 0.027) and resting heart rate (P 0.001) were reduced after ST. In the CO group, no significant changes were observed in the examined variables after 12 weeks. Despite within group changes in the ST group, no significant differences were observed after 12 weeks between groups in echocardiographic variables, peak oxygen consumption, blood pressure and peripheral microvascular function. Conclusion: In men with prostate cancer receiving ADT, echocardiography showed no abnormalities in cardiac structure and function. Twelve weeks of ST failed to elicit significant cardiovascular adaptations and ADT may blunt cardiovascular adaptations to short-term exercise training.

关键词： Prostate Cancer Exercise Rehabilitation Cardiovascular

Hyperbaric Oxygen Treatment for Diabetic Retinopathy and Neuropathy in a Streptozotocin Induced Diabetic Rat Model

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Journal of Biomedical Science and Engineering 2021年第12期14卷 391-401页

作者： Jesper G. Madsen Martin N. Skov Kasper Hansen Christoffer Laustsen Niels Ejskjær Henning andersen michael Pedersen Department of Clinical Medicine Comparative Medicine Lab Aarhus University Aarhus Denmark Zoophysiology Department of Biology Aarhus University Aarhus C Denmark Department of Forensic Medicine Aarhus University Aarhus N Denmark Department of Clinical Medicine The MR Research Centre Aarhus University Aarhus Denmark Department of Clinical Medicine Aalborg University Aalborg Denmark Steno Diabetes Center North Denmark Aalborg University Hospital Aalborg Denmark Department of Neurology Aarhus University Hospital Aarhus Denmark

Aim: Diabetes Mellitus is a global public health challenge with major and potentially devastating complications, and concomitant complications include retinopathy and neuropathy due to hypoxia and microvascular dysfunction. In this study, we investigated the effect of hyperbaric oxygen therapy as a method to transiently improve tissue oxygenation on diabetic retinopathy and neuropathy in a streptozotocin induced type-1 diabetic rat model (Wistar). Methods: Streptozotocin induced type-1 diabetic rats received 10 sessions of 2-h hyperbaric oxygen exposures (pO2 = 309 kPa) over 2 weeks. Animals were exposed to light stimuli to produce light evoked potentials to estimate the effect of oxygen treatment on diabetic retinopathy. Sciatic nerves were exposed and stimulated to produce muscle evoked potential, which were recorded in the muscles of the foot and subsequently used to evaluate the effect of oxygen treatment on diabetic neuropathy. Results: We found significantly shorter light evoked potential latency and increased amplitude in hyperbaric oxygen treated animals. No change was found in nerve conduction. Conclusions: This study showed that hyperbaric oxygen therapy is a potentially effective treatment for diabetic retinopathy, improving both latency and amplitude of light evoked potentials.

关键词： Diabetic Neuropathy Diabetic Retinopathy Hyperbaric Oxygen Therapy

Retinal Vessels Diameter Changes during Pregnancy in Type 1 Diabetes

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Open Journal of Ophthalmology 2013年第2期3卷 27-32页

作者： Aurore Mensah Afrouz Ahmadzadeh Ann-Sofie Svanbom Lene Ringholm Birgit Sander Henrik Lund-andersen Elisabeth Mathiesen michael Larsen Department of Endocrinology Rigshospitalet Copenhagen Denmark Department of Ophthalmology Glostrup Hospital Glostrup Denmark Faculty of Health Sciences University of Copenhagen Copenhagen Denmark

Objective: Investigate how pregnancy-induced hormonal and hemodynamic changes affect retinal vessels caliber dynamic and the course of diabetic retinopathy. Methods: Retinopathy grading and vessel diameter measurement using digital fundus photographs in women with diabetes type 1 taken no more than one year before conception, during week 10 and/or 22, week 34, and within one year after delivery. Calibers were measured using a custom-developed semi-automated computer algorithm which identified the six largest arteries and six largest veins and calculated the central retinal artery equivalent (CRAE) and central vein equivalent (CRVE) diameters. Glycemic control was assessed quarterly by HbA1c. Systolic and diastolic blood pressure was assessed at week 10, 22 and 34. Results: Photographs at baseline, weeks 10, 22, 34 and after delivery were available in 28 patients, of whom 24 did not progress in retinopathy. For those whose level of retinopathy remained stable CRAE constricted from 138.80 ± 21.27 μm at baseline to 129.88 ± 13.97 μm at week 10 (p = 0.0379) CRVE constricted from 195.16 ± 24.98 μm at baseline to 185.97 ± 21.96 μm at week 10 (p = 0.0400). The patients with retinopathy progression had a CRAE of 131.67 ± 13.37 μm at baseline and 132.08 ± 11.07 μm at week 10 (p = 0.34) while CRVE was 195.33 ± 24.92 μm at baseline and 204.27 ± 10.18 μm at week 10 (p = 0.16). Progressors had higher blood pressures at week 10. Conclusion: Retinal vessels constricted between prepregnancy and first trimester in women who did not experience diabetic retinopathy progression. The study suggests that the vessels constriction seen in early pregnancy contributes to reduce the risk of gestational microvascular complications and progression of diabetes in the eye.

关键词： Pregnancy and Diabetes Type 1 Diabetic Retinopathy Central Retinal Artery Equivalent Central Retinal Vein Equivalent.

A very energetic supernova associated with the γ-ray burst of 29 March 2003

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A very energetic supernova associated with the γ-ray burst ...

中国天文学会高能分会2004年学术年会

作者： Jens Hjorth Jesper Sollerman Palle Mφller Johan P.U.Fynbo Stan E.Woosley Chryssa Kouveliotou Nial R.Tanvir Jochen Greiner michael I.andersen Alberto J.Castro-Tirado José María Castro Cerón Andrew S.Fruchter Javier Gorosabel Páll Jakobsson Lex Kaper S Astronomical Observatory NBIfAFG University of Copenhagen Juliane Maries VejDK-2100 Copenhagenφ Denmark Stockholm Observatory Department of Astronomy AlbaNova S-10691 StockholmSweden European Southern Observatory Karl-Schwarzschild-Strasse 2 D-85748 Garchingbei München Germany Department of Physics and Astronomy University of Aarhus Ny MunkegadeDK-8000rhus C Denmark Department of Astronomy and Astrophysics University of California Santa CruzCalifornia 95064 USA NSSTC SD-50 320 Sparkman Drive Huntsville Alabama 35805 USA Department of Physical Sciences University of Hertfordshire College LaneHatfield AL10 9AB UK Max-Planck-Institut für extraterrestrische Physik D-85741 Garching Germany Astrophysikalisches Institut D-14482 Potsdam Germany Instituto de Astrofísica de Andalucía （IAA-CSIC） PO Box 03004 E-18080 GranadaSpain Space Telescope Science Institute 3700 San Martin Drive BaltimoreMaryland 21218 USA Space Telescope Science Institute 3700 San Martin Drive BaltimoreMaryland 21218 USA Space Telescope Science Institute 3700 San Martin Drive BaltimoreMaryland 21218 USA Instituto de Astrofísica de Andalucía （IAA-CSIC） PO Box 03004 E-18080 GranadaSpain Astronomical Observatory NBIfAFG University of Copenhagen Juliane Maries VejDK-2100 Copenhagen φ Denmark Astronomical Institute Anton Pannekoek Kruislaan 403 NL-1098 SJ AmsterdamNetherlands Thüringer Landessternwarte Tautenburg D-07778 Tautenburg Germany Istituto di Astrofisica Spaziale e Fisica Cosmica - Sezione di Bologna CNRvia Gobetti 101 I-40129 Bologna Italy Astronomical Observatory NBIfAFG University of Copenhagen Juliane Maries VejDK-2100 Copenhagen φ Denmark Astronomical Observatory NBIfAFG University of Copenhagen Juliane Maries VejDK-2100 Copenhagen φ Denmark INAF Osservatorio Astronomico di Trieste Via G.B. Tiepolo 11 I-34131 TriesteItaly Istituto di Astrofisica Spaziale e Fisica Cosmica - Sezione di Bologna CNRvia Gobetti 101 I-40129 Bologna Italy Space Telescope Science I

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提尔皮茨博物馆

城市环境设计 2019年第2期118卷 128-141页

作者： David Zahle Andreas K.Pedersen Snorre Emanuel Nash J?rgensen michael andersen Hugo Soo Marcella Martinez Geoffrey Eberle Adam Busko Hanna Johansson Jakob Andreassen Charlotte Cocco Mikkel Marcker Stubgaard michael Sch?nemann Jensen Alejandro Mata Gonzales Kyle Thomas David Tousant Jesper Boye andersen Alberte Danvig Jan Magasanik Enea Michelesio Alina Tamosiunaite Ryohei Koike Brigitta Gulyás Katarzyna Krystyna Siedlecka Andrea Scalco Tobias Hjortdal Maria Teresa Fernandez Rojo Rasmus Hjortshoj 运小红

新落成的提尔皮茨博物馆是沙漠中的一处庇佑所,它的存在就像是对曾经发生在丹麦西海岸的战争历史的一次平静的隔空对话。这座面积为2 800m2的"隐形博物馆"开创性地将德国二战时期的战壕延伸转变为一个文化容器,其中的四个展厅,运用简单... 详细信息

新落成的提尔皮茨博物馆是沙漠中的一处庇佑所,它的存在就像是对曾经发生在丹麦西海岸的战争历史的一次平静的隔空对话。这座面积为2 800m2的"隐形博物馆"开创性地将德国二战时期的战壕延伸转变为一个文化容器,其中的四个展厅,运用简单的结构体系无缝嵌入大地。初到这里,参观者首先将看到的是原有的战壕,直到他们穿过荒草丛生的小径,才会渐渐感知这些深深刻入沙丘的墙体,从各个方向

关键词：卫生间博物馆群 Section 提尔皮茨

新西兰全新世冰川高频变动不同于北半球气候变化模式

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海洋地质 2009年第3期25卷 41-46页

作者： Joerg M. Schaefer George H. Denton michael Kaplan Aaron Putnam Robert C. Finkel David J. A. Barrell Bjom G. andersen Roseanne Schwartz Andrew Mackintosh Trevor Chinn Christian Schlǔchter 张江勇（译）

理解全新世南、北半球之间气候变化的时间及原因至今仍是气候科学的一大主要问题。本文讨论的是过去7000年里新西兰南阿尔卑斯山冰川进退的高分辨率”Be年代学，其中最近1000年里至少发生了5个冰川变动事件。全新世中期至晚期的冰进活... 详细信息

理解全新世南、北半球之间气候变化的时间及原因至今仍是气候科学的一大主要问题。本文讨论的是过去7000年里新西兰南阿尔卑斯山冰川进退的高分辨率”Be年代学，其中最近1000年里至少发生了5个冰川变动事件。全新世中期至晚期的冰进活动范围在缩小，该冰川活动模式和对应时期北半球冰川活动模式很不相同。这一发现表明区域驱动和（或）区域放大机制的重要性。我们认为西南太平洋大气环流的变化是导致新西兰全新世冰川高频进退活动的一个重要因素。

关键词：全新世中期气候变化北半球新西兰冰川高频活动模式阿尔卑斯山