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Bottomonium Spectrum with Screened Potential

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Communications in Theoretical Physics 2009年第10期52卷 653-661页

作者： LI Bai-Qing CHAO Kuang-ta Department of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China Department of Physics Huzhou Teachers College Huzhou 313000 China

As a sister work of[Phys. Rev. D 79 （2009） 094004], we incorporate the color-screening effect due to light quark pair creation into the heavy quark-antiquark potential, and investigate the effects of screened potential on the spectrum of bottomonimn. We calculate the masses, electromagnetic decays, and E1 transitions of bottomonium states. We find that the fine splittings between χbJ （J = 0, 1, 2） states are in good agreement with experimental data, and the E1 transition rates of γ（2S） → γχbJ（1P） and γ（3S） →γχbJ（2P）（J = 0, 1, 2） all agree with data within experimental errors. In particular, the mass of γ（6S） is lowered down to match that of the γ（11020）, which is smaller than the predictions of the linear potential models by more than 100 MeV. Comparison between charmonium and bottomonium in some related problems is also discussed.

关键词： color-screening effect Bottomonium

Design of Floating Mass Type Piezoelectric Actuator for Implantable Middle Ear Hearing Devices

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Chinese Journal of Mechanical Engineering 2009年第2期22卷 221-226页

作者： LIU Houguang ta Na MING Xiaofeng RAO Zhushi State Key Laboratory of Mechanical System and Vibrations Shanghai Jiao Tong University Shanghai 200240 China

To overcome some of the problems inherent in conventional heating aids such as low gain at high fi＇equencies due to acoustic feedback, discomfort in occlusion of the extemal ear canal and so on, implantable middle ear hearing devices （IMEHDs） have been developed over the past two decades. For such kinds of IMEHDs, this paper presents the design of a floating mass piezoelectric actuator using a PMN-30%PT stack as a new type of vibrator. The proposed piezoelectric actuator consists of only three components of a piezoelectric stack, a metal case and a clamp. For the purpose of aiding the design of this actuator, a coupling biomechanics model of human middle ear and the piezoelectric actuator was constructed. This model was built based on a complete set of computerized tomography section images of a healthy volunteer＇s left ear by reverse engineering technology. The validity of this model was confirmed by comparing the motion of the tympanic membrane and stapes footplate obtained by this model with published experimental measurements on human temporal bones. It is shown that the designed actuator can be implanted on the incus long process by a simple surgical operation, and the stapes footplate displacement by its excitation at 10.5 V root-mean-square（RMS） voltage was equivalent to that from acoustic stimulation at 100 dB sound pressure level（SPL）, which is adequate stimulation to the ossicular chain. The corresponding power consumption is 0.04 mW per volt of excitation at 1 kHz, which is low enough for the transducer to be used in an implantable middle ear device.

关键词： piezoelectric actuator implantable middle ear hearing device floating mass fmite element model

On the Non-Commutative Neutrix Product of the Distributions x＋^λ and x^＋μ

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Acta Mathematica Sinica,English Series 2006年第6期22卷 1639-1644页

作者： B.FISHER K.ta■ Department of Mathematics University of Leicester Department of Mathematics Cankaya University

Let f and g be distributions and let gn = （g ＊ δn）（x）, where δn （x） is a certain converging to the Dirac delta function. The non-commutative neutrix product fog of f and g to be the limit of the sequence {fgn }, provided its limit h exists in the sense that sequence is defined N-lim n-∞（f（x）g,, （x）, φ（x）〉 = （h（x）, φ（x）},for all functions p in 2. It is proved that （x^λ＋1n^px＋）0（x^μ＋1n^qx＋）=x＋^λμ1n^p＋qx＋,（x^λ-1n^qx-）=x-^λ＋μ1n^p＋qx-,for λ＋μ〈-1; λ,μ, λ＋μ≠-1,-2…and p,q=0,1,2……

关键词： distribution delta function product of distributions

Blood Pressure and Heart Rate Measurements Using Photoplethysmography with Modified LRCN

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Computers, Materials & Continua 2022年第4期71卷 1973-1986页

作者： Chih-ta Yen Cheng-Hong Liao Department of Electrical Engineering Taiwan Ocean UniversityKeelung City202301Taiwan Department of Electrical Engineering National Formosa UniversityYunlin County632Taiwan

In this study,single-channel photoplethysmography(PPG)signals were used to estimate the heart rate(HR),diastolic blood pressure(DBP),and systolic blood pressure(SBP).A deep learning model was proposed using a long-term recurrent convolutional network(LRCN)modified from a deep learning algorithm,the convolutional neural network model of the modified inception deep learning module,and a long short-term memory network(LSTM)to improve the model’s accuracy of BP and HR *** PPG data of 1,551 patients were obtained from the University of California Irvine Machine Learning *** to design a filter of PPG signals and how to choose the loss functions for deep learning model were also discussed in the ***,the stability of the proposed model was tested using a 10-fold cross-validation,with an MAE±SD of 2.942±5.076 mmHg for SBP,1.747±3.042 mmHg for DBP,and 1.137±2.463 bpm for the *** with its existing counterparts,the model entailed less computational load and was more accurate in estimating SBP,DBP,and *** results established the validity of the model.

关键词： Photoplethysmography(PPG)signal deep learning blood pressure systolic blood pressure(SBP) diastolic blood pressure(DBP) heart rate(HR)

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儿童肥厚型心肌病治疗的研究进展

中华心血管病杂志 2024年第6期52卷 723-728页

作者：常凌潇李静史晓荷鲁孝楠王静拓胜军刘丽文空军军医大学西京医院超声医学科西安710032

肥厚型心肌病是常见的遗传性心肌病,具有高度异质性和高猝死率的特点,是儿童心原性猝死的最常见原因。该文对儿童肥厚型心肌病的药物及侵入性治疗、心律失常管理、特殊类型肥厚型心肌病治疗等方面的研究进展进行综述,以期为临床治疗及... 详细信息

肥厚型心肌病是常见的遗传性心肌病,具有高度异质性和高猝死率的特点,是儿童心原性猝死的最常见原因。该文对儿童肥厚型心肌病的药物及侵入性治疗、心律失常管理、特殊类型肥厚型心肌病治疗等方面的研究进展进行综述,以期为临床治疗及进一步研究提供参考。

关键词：心肌病,肥厚性儿童药物治疗手术治疗心原性猝死

Inter-granular exchange coupling and magnetic anisotropy of ta/Ru/Co-23 at%Pt perpendicular thin films with different Ru underlayer thicknesses

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Rare Metals 2016年第6期35卷 463-470页

作者： Na Xiao Bo Yang Jian-sheng Wang Song Li Yu-Ping Ren Gao-Wu Qin Research Academy Northeastern University Shenyang 110819China Key Laboratory for Anisotropy and Texture of Materials (MoE) School of Materials Science and Engineering Northeastern University Shenyang 110819 China

In the present work, a series of ta/Ru/Co- 23 at%Pt thin films with varied Ru underlayer thicknesses were fabricated by magnetron sputtering. All of the films show c-axis preferred orientation perpendicular to the film surface. The drop of c/a ratio and lattice expansion of Co- Pt layer with the increase in Ru underlayer thickness was revealed by X-ray diffraction （XRD）. The coercivity of the ta/Ru/Co-Pt thin films increases drastically with Ru underlayer thickness increasing, due to the enhancement of effective magneto-crystalline anisotropy constant and exchange decoupling of magnetic nano-grains. The enhancement of effective magneto-crystalline anisotropy constant is ascribed to the lattice deformation of Co-Pt layer by mismatching the Ru layer and Co-Pt surface. Moreover, the exchange decoupling of magnetic nanograins is attributed to the further isolation of magnetic nano-grains.

关键词： Co-Pt Perpendicular recording media Crystallographic orientation Exchange coupling

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温室传热水道与土壤换热强度影响的数值分析

农机化研究 2024年第9期46卷 257-263页

作者：甄琦杜嘉玮塔娜闫彩霞孙云峰内蒙古农业大学能源与交通工程学院呼和浩特010018

以呼和浩特市某日光温室铺设的传热水道为研究对象,为提供传热水道在土壤中铺设间距、深度的准确依据,利用CFD数值模拟技术对传热水道在不同供水温度(30、40、50℃)、不同埋管深度(30、40、50cm)、不同管道间距(20、40、50cm)的情况时... 详细信息

以呼和浩特市某日光温室铺设的传热水道为研究对象,为提供传热水道在土壤中铺设间距、深度的准确依据,利用CFD数值模拟技术对传热水道在不同供水温度(30、40、50℃)、不同埋管深度(30、40、50cm)、不同管道间距(20、40、50cm)的情况时对温室土壤的换热强度进行研究与分析。结果表明:埋管深度越深对土壤地面温度影响越小,管道间距越宽则土壤的温度分布越分散,使土壤不容易达到温度扩散的饱和值,管温越高对管道以下的土壤影响越大,造成资源浪费;当埋管深度为30cm、管间距为20cm时,土壤的换热效果最佳。研究结果可为温室传热水道对土壤加热提供理论参考。

关键词：土壤计算流体力学传热水道换热强度日光温室

以残疾人收入为基点的内蒙古残疾人社会保障政策评价分析

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集宁师范学院学报 2024年第1期46卷 89-94,107页

作者：刘春塔娜韩咏梅集宁师范学院内蒙古乌兰察布012000 内蒙古自治区残疾人康复服务中心内蒙古呼和浩特010050

残疾人收入水平是残疾人社会保障事业高质量发展的重要衡量标准。本文在实地调研基础之上结合2022年内蒙古残疾人事业发展统计公告,对内蒙古残疾人社会保障政策促进内蒙古残疾人收入增长效果进行了评价分析。分析结果显示:内蒙古残疾人... 详细信息

残疾人收入水平是残疾人社会保障事业高质量发展的重要衡量标准。本文在实地调研基础之上结合2022年内蒙古残疾人事业发展统计公告,对内蒙古残疾人社会保障政策促进内蒙古残疾人收入增长效果进行了评价分析。分析结果显示:内蒙古残疾人收入水平低,转移支付占收入比重远高于国内平均水平,残疾人返贫风险高;残疾人就业水平低,质量不高;缺乏对残疾人创业的优惠政策及帮扶政策;残疾人就医康复照顾、入学教育等多样化需求未能够得到满足;对残疾人工作包容度不高。针对这些问题,本文提出进一步健全和完善残疾人社会保障机制、建立残疾人事业发展数字化平台、对长期为残疾人提供转移支付的亲属给予税收减免等建议。

关键词：残疾人收入残疾人社会保障政策政策评价

结合密集注意力的自适应特征融合图像去雾网络

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计算机系统应用 2024年第2期33卷 72-82页

作者：王燕他雪卢鹏屹兰州理工大学计算机与通信学院兰州730050

目前,大多数图像去雾算法忽视图像的局部细节信息,无法充分利用不同层次的特征,导致恢复的无雾图像仍存在颜色失真、对比度下降和雾霾残留现象,针对这一问题,提出结合密集注意力的自适应特征融合图像去雾网络.该网络以编码器-解码器结... 详细信息

目前,大多数图像去雾算法忽视图像的局部细节信息,无法充分利用不同层次的特征,导致恢复的无雾图像仍存在颜色失真、对比度下降和雾霾残留现象,针对这一问题,提出结合密集注意力的自适应特征融合图像去雾网络.该网络以编码器-解码器结构为基本框架,中间嵌入特征增强部分与特征融合部分,通过在特征增强部分叠加由密集残差网络与CS联合注意模块构成的密集特征注意块,使网络可以关注图像的局部细节信息,同时增强特征的重复利用,有效防止梯度消失;在特征融合部分构建自适应特征融合模块融合低级与高级特征,防止因网络加深而造成浅层特征退化.实验结果表明,所提算法在合成有雾图像数据集和真实有雾图像数据集上均表现优异,在SOTS室内合成数据集上的峰值信噪比和结构相似性分别达到了35.81 dB和0.9889,在真实图像数据集O-HAZE上的峰值信噪比和结构相似性分别达到了22.75 dB和0.7788,有效解决了颜色失真、对比度下降和雾霾残留等问题.

关键词：图像去雾深度学习编码器-解码器密集连接注意力机制特征融合