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扬声器力学分布式参数(第二部分:诊断篇)(待续)

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电声技术 2012年第11期36卷 14-18,22页

作者： Wolfgang Klippel joachim schlechter 王刚平 Klippel GmbH Faculty of Computer Science University of Technology 浙江恒科实业有限公司浙江嘉兴314113

力学分布式参数描述了扬声器单元的振动与声辐射面之间的关系。这些参数是预测声压输出和把总的振动分解成不同模态或是与声压有关的分量的基础。这种分析把声学与力学问题分离开来,表明了其与几何特性、材料属性之间的关系,并给出了实... 详细信息

力学分布式参数描述了扬声器单元的振动与声辐射面之间的关系。这些参数是预测声压输出和把总的振动分解成不同模态或是与声压有关的分量的基础。这种分析把声学与力学问题分离开来,表明了其与几何特性、材料属性之间的关系,并给出了实际改善的方向。利用这种新的扬声器诊断方法来对设计优化中的常见问题进行讨论。

关键词：扬声器分布式参数分解诊断声辐射振动累积加速度级有限元分析

扬声器力学分布式参数(第一部分:测量篇)(待续)

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电声技术 2012年第9期36卷 15-18,22页

作者： Wolfgang Klippel joachim schlechter 王刚平 Klippel GmbH Dresden 01277Germany Faculty of Computer Science University of TechnologyDresdenGermany 浙江恒科实业有限公司

扬声器单元的力学振动可以由一组线性的传递函数和几何数据来描述,这些数据是通过测量辐射体(如锥体、半球形膜片、振动盆、活塞、平板等)上的若干个选择点得到的。这些分布式参数是对集总参数(包括T-S、非线性、热学参数)的有益补充,... 详细信息

扬声器单元的力学振动可以由一组线性的传递函数和几何数据来描述,这些数据是通过测量辐射体(如锥体、半球形膜片、振动盆、活塞、平板等)上的若干个选择点得到的。这些分布式参数是对集总参数(包括T-S、非线性、热学参数)的有益补充,它使得锥体、扬声器单元与扬声器系统设计之间的联系易于理解,并开启了一种新的扬声器诊断方法。重点着眼于激光扫描技术和对数据的后处理。力学振动将会用到一个新的量来概述,即:累积加速度级(AAL),当没有声抵消出现时,它和声压级(SPL)是相当的。这个参数和其他导出的参数是模态分析和全新的分解技术的基础,这一方法使得力学振动和声压输出之间的关系更为明晰。最后,将指出分布式参数在有限元法或边界元分析法中的用法,并给出有益于扬声器设计过程的结论。

关键词：扬声器力学振动声辐射测量累积加速度级分布式参数激光扫描分解

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扬声器锥体振动的测量及可视化(续完)

电声技术 2012年第5期36卷 27-31页

作者： Wolfgang Klippel joachim schlechter 王刚平 Klippel GmbH Dresden 01277Germany Faculty of Computer Science University of TechnologyDresdenGermany 浙江恒科实业有限公司

4．4分解3D动面对于展示某一频率下锥体的总的振动极为形象。要更为详细地分析其振动特性，就得将总的运动分解成具有不同属性的独立的振动分量。

关键词：振动特性锥体可视化扬声器测量运动分解

扬声器力学分布式参数(第二部分:诊断篇)(续完)

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电声技术 2012年第12期36卷 15-17,21页

作者： Wolfgang Klippel joachim schlechter 王刚平 Klippel GmbH Dresden 01277Germany Faculty of Computer Science University of TechnologyDresdenGermany 浙江恒科实业有限公司

要避免声抵消或消除总的SPL响应上的谷值，那么同相分量的SPL或似￡响应应至少高于反相分量的SPL或似三响应6dB。如果同相分量始终起着主导作用，那么这部分分量将是来自于辐射面的固定区域的振动，这部分区域是受限制的，且随着频率的... 详细信息

要避免声抵消或消除总的SPL响应上的谷值，那么同相分量的SPL或似￡响应应至少高于反相分量的SPL或似三响应6dB。如果同相分量始终起着主导作用，那么这部分分量将是来自于辐射面的固定区域的振动，这部分区域是受限制的，且随着频率的升高，其辐射面的区域会逐渐减小。传统的纸锥体的顶角都会小于70°，它出现分裂模式是逐渐从外区域往内的。第一个波节比较靠近外折环，这是因为锥体壳在此处的曲率要比趋于锥体中心部分的曲率小，其弯曲劲度也要低得多。

关键词：分布式参数扬声器同相分量诊断力学 SPL 辐射面分区域

扬声器力学分布式参数(第一部分:测量篇)(续完)

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电声技术 2012年第10期36卷 16-20页

作者： Wolfgang Klippel joachim schlechter 王刚平 Klippel GmbH Dresden 01277Germany Faculty of Computer Science University of TechnologyDresdenGermany 浙江恒科实业有限公司

基本的振动参数及几何特性包含着有价值的信息，这些信息可以导出二级参数以用于扬声器的设计及诊断。

关键词：扬声器分布式参数测量力学几何特性振动参数信息

Apoer2/Lrp8:the undercover cop of synaptic homeostasis

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Neural Regeneration Research 2024年第12期19卷 2563-2564页

作者： Gordon C.Werthmann joachim Herz Department of Molecular Genetics and Center for Translational Neurodegeneration Research University of Texas Southwestern Medical Center at DallasDallasTXUSA Department of Neuroscience Department of Neurology University of Texas Southwestern Medical Center at Dallas DallasTXUSA

Apolipoprotein E receptor 2(ApoER2)is a receptor for the protein ApoE,the most common genetic risk factor for late-onset Alzheimer's disease(AD).It is also a key modulator of syna ptic homeostasis,in part through its effect on the expression of neuronal genes including those implicated in AD and other neuropsychiatric *** this perspective,we highlight several genes affected by ApoER2 and its alternatively spliced forms and how aberrant expression can be rescued by the reintroduction of the ApoER2 intracellular domain in the mouse hippocampus.

关键词： homeostasis ApoE Alzheimer

Does HSP27 injection induce glaucoma damage in mice?

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Neural Regeneration Research 2024年第11期19卷 2347-2348页

作者： Stephanie C.joachim Sabrina Reinehr Experimental Eye Research Institute University Eye HospitalRuhr-University BochumBochumGermany

In a further aging society,excellent eyesight is an integral part of overall well-being and quality of *** good vision is crucial to maintaining mobility,independence,and mental *** can be several reasons for visual impairment in elderly people,these include age-related macular degeneration,the leading cause of vision loss among older adults,cataract,glaucoma,diabetic retinopathy,retinal detachment,and others.

关键词： HSP27 injection damage

The whole and its parts: Visualizing Gaussian mixture models

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Visual Informatics 2024年第2期8卷 67-79页

作者： joachim Giesen Philipp Lucas Linda Pfeiffer Laines Schmalwasser Kai Lawonn Friedrich-Schiller-University Jena Germany German Aerospace Center DLR-Institute of Data Science Jena Germany

Gaussian mixture models are classical but still popular machine learning *** appealing feature of Gaussian mixture models is their tractability,that is,they can be learned efficiently and exactly from data,and also support efficient exact inference queries like soft clustering data *** seemingly simple,Gaussian mixture models can be hard to *** are at least four aspects to understanding Gaussian mixture models,namely,understanding the whole distribution,its individual parts(mixture components),the relationships between the parts,and the interplay of the whole and its *** a structured literature review of applications of Gaussian mixture models,we found the need for supporting all four *** identify candidate visualizations that effectively aid the user needs,we structure the available design space along three different representations of Gaussian mixture models,namely as functions,sets of parameters,and sampling *** the design space,we implemented three design concepts that visualize the overall distribution together with its ***,we assessed the practical usefulness of the design concepts with respect to the different user needs in expert interviews and an insight-based user study.

关键词： Gaussian mixture models

Prevalence and intensity of urinary schistosomiasis and soil-transmitted helminths among women of reproductive age in Mwaluphamba,Kwale

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Asian Pacific Journal of Tropical Medicine 2024年第2期17卷 71-83页

作者： Samuel M.Ngui Joseph M.Mwangangi joachim Richter Josephine W.Ngunjiri Department of Biological Sciences University of EmbuKenya Medical Entomology Kenya Medical Research Institute(KEMRI)Center for Geographic Medicine Research Coast KilifiKenya Institute of International Health Global Health CenterCharitéUniversity MedicineBerlinCorporate Member of Free University and Humboldt University and Berlin Institute of HealthBerlinGermany Swiss Tropical and Public Health Institute BaselSwitzerland Tropical and Infectious Diseases Department of Biological sciencesUniversity of EmbuKenya

Objective:To assess the epidemiology of urinary schistosomiasis and soil-transmitted helminthiasis among women of reproductive age in Mwaluphamba,Kwale County,***:A community-based cross-sectional study design was employed to randomly sample 422 women of reproductive age(15-<50 years)from four villages in Mwaluphamba *** specimens were collected and examined using the Kato-Katz method,while filtration technique was used to analyze urine ***’sociodemographic details were obtained using a standardized ***:Urinary schistosomiasis prevalence was at 4.7%(20/422,95%CI 2.8%-6.9%)while the prevalence of soil-transmitted helminthiasis infection was 4.5%(19/422,95%CI 2.6%-6.7%).The infection intensities of urinary schistosomiasis among the study participants ranged from 1 to 120 eggs/10 mL of urine with median egg count of 18.45 eggs/10 *** patients were diagnosed with light infection,of 56.16 egg/gram and 48.48 egg/gram for Trichuris trichiura and hookworms,*** without latrines had 15.7 times higher risk of having urinary schistosomiasis compared to those with a ***,use of surface water(aOR=1.0,95%CI 0.2-1.4,P=0.010)and crossing the river to go to a place(aOR=1.1,95%CI 0.3-1.6,P=0.009)were statistically significant risk factors for getting urinary *** bivariable regression analysis,defecating around the water source(OR=4.3,95%CI 1.5-12.9)had a statistically significant association with the prevalence of soil-transmitted helminthiasis(P=0.008).Conclusions:This study has given an insight on the prevalence and intensity of urinary schistosomiasis and soil-transmitted helminthiasis in Mwaluphamba location that form a basis for strengthening the control and elimination programmes for these neglected tropical diseases.

关键词： Urinary schistosomiasis Prevalence Soiltransmitted helminths Mwaluphamba