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湍流边界层脉动压力对声强测量的影响研究(英文)

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船舶力学 2010年第3期14卷 314-323页

作者：史小军 finn JACOBSEN 中国船舶科学研究中心江苏无锡214082 丹麦技术大学声学系丹麦2800

实际声强测量时常常存在风流或水流,如在飞机或船舶上进行测量,声强探头将受到湍流边界层脉动压力的影响。如何评估该影响以及如何修正测量结果是人们十分关心的工程实用问题。该文首先简要介绍了建立的由湍流边界层脉动压力诱发声强的... 详细信息

实际声强测量时常常存在风流或水流,如在飞机或船舶上进行测量,声强探头将受到湍流边界层脉动压力的影响。如何评估该影响以及如何修正测量结果是人们十分关心的工程实用问题。该文首先简要介绍了建立的由湍流边界层脉动压力诱发声强的理论模型。接着利用现有的湍流边界层脉动压力频率-波数谱模型,对湍流边界层脉动压力及其诱发的声强进行了数值分析。为了验证理论模型及数值结果,设计制作了一套实验装置,对湍流边界层脉动压力及其产生的声强进行了具体测量分析。结果表明,湍流边界层脉动压力的测量结果与数值结果吻合良好,测量得到的边界层脉动压力诱发的声强特性与计算结果也十分一致,但必须注意对测量传感器的空间响应进行修正。

关键词：声学声强湍流边界层脉动压力

The complexities of female mate choice and male polymorphisms： Elucidating the role of genetics, age, and mate-choice copying

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Current Zoology 2015年第6期61卷 1015-1035页

作者： Kasey D. FOWLER-finn Laura SULLIVAN-BECKERS Amy M. RUNCK Eileen A. HEBETS School of Biological Sciences University of Nebraska Lincoln NE 68508 USA

Genetic, life history, and environmental factors dictate patterns of variation in sexual traits within and across populations, and thus the action and outcome of sexual selection. This study explores patterns of inheritance, diet, age, and mate-choice copying on the expression of male sexual signals and associated female mate choice in a phenotypically diverse group of wolf spiders. Focal spiders exhibit one of two male phenotypes: 'ornamented' males possess large black brushes on their forelegs, and 'non-ornamented' males possess no brushes. Using a quantitative genetics breeding design in a mixed population of ornamented/non-ornamented males, we found a strong genetic basis to male phenotype and female choice. We also found that some ornamented males produced some sons with large brushes and others with barely visible brushes. Results of diet manipulations and behavioral mating trials showed no influence of diet on male phenotype or female mate choice. Age post maturation, however, influenced mate choice, with younger females being more likely to mate with ornamented males. A mate-choice copying experiment found that, following observations of another female's mate choice/copulation, virgin mature females tended to match the mate choice (ornamented vs. non-ornamented males) of the females they observed. Finally, analyses of genetic variation across phenotypically pure (only one male phenotype present) vs. mixed (both phenotypes present) populations revealed genetic distinction between phenotypes in phenotypically-pure populations, but no distinctionin phenotypically-mixed populations. The difference in patterns of genetic differentiation and mating across geographic locations suggests a complex network of factors contributing to the outcome of sexual selection.

关键词：数量遗传学基因多态性男性女性择偶年龄复杂性表型选择

Research for effective social work practice /

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The Generous Ethic of Deleuze

2007年

作者： Judy L. Krysik Jerry finn.

来源：畅想之星图书光盘版（南... 评论

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Journal of Philosophy Study 2016年第8期6卷 464-471页

作者： finn Janning Independent Philosopher

The influence of habitat heterogeneity and latitude on gamma diversity of the Nearctic Simuliidae, a ubiquitous group of stream-dwelling insects

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Insect Science 2018年第4期25卷 712-720页

作者： John W. McCreadie Rachel H. Williams Sam Stutsman Debra S. finn Peter H. Adler Department of Biology University of South Alabama Mobile Alabama USA Department of Earth Sciences Biology University of South Alabama Mobile Alabama USA Department of Integrative Biology Oregon State University Corvallis Oregon USA Department of Plant and Environmental Sciences Clemson University Clemson South Carolina USA

Among the most prominent, large-scale patterns of species richness are the increases in richness with decreasing latitude and with increasing habitat heterogeneity. Using the stream-dwelling larval and pupal stages of North American black flies （Diptera： Simuliidae）, we address 3 broad questions about species richness：（i） Does a significant latitude-richness relationship exist？（ii） How does habitat heterogeneity influence gamma diversity？（iii） What is the sign （positive or negative） of the latitude-richness and the heterogeneity-richness relationships？ We found no evidence that habitat heterogeneity influences gamma diversity. The estimated peak species richness for black flies in North America was at 50-53°N, which also corresponds with peak generic richness. All plesiomorphic, extant lineages of the Simuliidae in the Western Hemisphere are found in cool mountainous environments of North America, suggesting that peak richness at 50-53°N might be a signature of this phylogenetic pattern and a reflection of underlying historical processes

关键词： aquatic insects biodiversity gamma richness North America Simuliidae streams

Efficacy of remdesivir for hospitalized COVID-19 patients with end stage renal disease

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World Journal of Critical Care Medicine 2022年第1期11卷 48-57页

作者： Vijairam Selvaraj Amos Lal Arkadiy finn Joshua Ray Tanzer Muhammad Baig Atin Jindal Kwame dapaah-Afriyie George Bayliss Department of Medicine Miriam HospitalWarren Alpert Medical School of Brown UniversityProvidenceRI 02906United States Department of Medicine Division of Pulmonary and Critical CareMayo ClinicRochesterMN 55905United States Department of Biostatistics Core Lifespan GroupProvidenceRI 02906United States Department of Medicine Rhode Island Hospital and Alpert Medical SchoolBaylissDivision of Kidney and HypertensionBrown UniversityProvidenceRI 02906United States

BACKGROUND Since the beginning of corona virus disease 2019(COVID-19)pandemic,there has been a widespread use of remdesivir in adults and *** is little known information about its outcomes in patients with end stage renal disease who are on *** To assess the clinical outcomes with use of remdesivir in adult patients with end stage kidney failure on *** A retrospective,multicenter study was conducted on patients with end stage renal disease on hemodialysis that were discharged after treatment for COVID-19 between April 1,2020 and December 31,*** endpoints were oxygen requirements,time to mortality and escalation of care needing mechanical *** A total of 45 patients were included in the *** patients received remdesivir,and 25 patients did not receive *** patients were caucasian,females with diabetes mellitus and hypertension being the commonest *** was a trend towards reduced oxygen requirement(beta=-25.93,X^(2)(1)=6.65,P=0.0099,probability of requiring mechanical ventilation(beta=-28.52,X^(2)(1)=22.98,P<0.0001)and mortality(beta=-5.03,X^(2)(1)=7.41,P=0.0065)in patients that received remdesivir compared to the control *** Larger studies are justified to study the effects of remdesivir in this high-risk population with end stage kidney disease on dialysis.

关键词： COVID-19 Remdesivir End stage renal disease Dialysis Hemodialysis Kidney disease

Snapping elbow-A guide to diagnosis and treatment

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World Journal of Orthopedics 2018年第4期9卷 65-71页

作者： Jonathan Jetsmark Bjerre finn Elkj?r Johannsen Martin Rathcke Michael Rindom Krogsgaard Section for Sportstraumatology M51 Bispebjerg-Frederiksberg Hospital Institute for Sportsmedicine M81 Bispebjerg-Frederiksberg Hospital

AIM To develop practical guidelines for diagnosis and treatment of the painful snapping elbow syndrome(SE). METHODS Clinical studies were searched in the databases Pub Med and Scopus for the phrases "SE", "snapping triceps", "snapping ulnar nerve" and "snapping annular ligament". A total of 36 relevant studies were identified. From these we extracted information about number of patients, diagnostic methods, patho-anatomical findings, treatments and outcomes. Practical guidelines for diagnosis and treatment of SE were developed based on analysis of the data. We present two illustrative patient cases-one with intra-articular pathology and one with extra-articular *** Snapping is audible, palpable and often visible. It has a lateral(intra-articular) or medial(extra-articular) pathology. Snapping over the medial humeral epicondyle is caused by dislocation of the ulnar nerve or a part of the triceps tendon, and is demonstrated by dynamic ultrasonography. Treatment is by open surgery. Lateral snapping over the radial head has an intra-articular pathology: A synovial plica, a torn annular ligament or a meniscus-like remnant from the foetal elbow. Pathology can be visualized by conventional arthrography, magnetic resonance(MR) arthrography, high resolution magnetic resonance imaging(MRI) and arthroscopy, while conventional MRI and radiographs often turn out normal. Treatment is by arthroscopic or eventual open resection. Early surgical intervention is recommended asthe snapping can damage the ulnar nerve(medial) or the intra-articular cartilage(lateral). If medial snapping only occurs during repeated or loaded extension/flexion of the elbow(in sports or work) it may be treated by reduction of these activities. Differential diagnoses are loose bodies(which can be visualized by radiographs) and postero-lateral instability(demonstrates by clinical examination). An algorithm for diagnosis and treatment is *** The primary step is establishment of l

关键词： Elbow Arthroscopy Surgery Diagnosis Ultrasonography Snapping

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A Brave Face

当代外语研究 2006年第2期 31-33页

作者： Robin finn 尚文

人的一生可能会遇到各种难以预料的意外和挫折。如何面对这些意外和挫折呢?本文的主人公在52岁时遭遇了常人难以想象的不幸,但她的乐观和积极态度帮她恢复了对生活的信心,相信她的人生经历会对大家有所启发。

关键词：积极态度恢复人生经历乡村地区意外硫磺酸想象常人信心生活

Alendronate treatment does not inhibit bone formation within biphasic calcium phosphate ceramics in posterolateral spinal fusion： an experimental study in porcine model

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Chinese Medical Journal 2009年第22期122卷 2770-2774页

作者： XUE Qing-yun JI Quan LI Hai-sheng ZOU Xue-nong Niels Egund Martin Lind finn B Christensen Cody Bringer Orthopedics Research Laboratory Spree Section E Institute Ior Experimental Clinical Research Aarhus University Hospital Aarhus Denmark Department of Orthopedic Beijing Hospital Beijing 100730 China ng Hospital Beijing 100730China

Background Biphasic calcium phosphate （BCP） ceramics has a potential advantage as an osteoconductive matrix and has an optimal resorption rate for bone formation. Using BCP ceramics as a bone graft during spinal fusion requires osteogenesis within the material and subsequent bridging between adjacent vertebraes to provide long-term support. Bisphosphonates have been reported to prolong the process of bone healing. The influence of bisphosphonate treatment on bone formation within BCP ceramics in spinal fusion remains unknown. The aim of this study was to evaluate the influence of alendronate on BCP osteoaenesis in Dosterolateral spinal fusion.Methods Posterolateral spinal fusion with pedicle screw fixation was performed at the lumbar spine in twenty-two pigs. BCP ceramics were applied as a bone graft to obtain bone fusion between adjacent transverse processes. Eleven pigs in the treatment group received oral alendronate 10 mg/d for three months postoperatively. Eleven pigs in the control group did not receive treatment with alendronate. All animals underwent posterolateral spinal fusion with BCP ceramics. The fusion rate was evaluated three months after the operation.Results The fusion rates evaluated by X-ray were 27.3% in the treatment group and 20% in the control group. The fusion rates using histological evaluation were 18.2% in the treatment group and 20% in the control group. The mean volumes of fusion mass were （3.64±0.86） cm^3 in the treatment group and （4.26±0.63） cm^3 in the control group. No significant differences were found in either trabecular bone volume or residual BCP volume between treatment and control groups using histological evaluation. The new bone formation within BCP ceramics was greater in the area adjacent to transverse process （P 〈0.01）.Conclusion Oral alendronate with a dose of 10 mg daily do not inhibit bone formation within BCP ceramics or affect the fusion rate in posterolateral spinal fusion from porcine models.

关键词： spinal fusion alendronate calcium phosphate computed tomography