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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

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)

sporopollen Assemblage Characteristics of surface sediments in Offshore Area of Western Bohai sea

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Marine science Bulletin 1999年第1期1卷 83-90页

作者： Xu Jiasheng and sun TingzhiFirst Institute of Oceanography, soa, QingdaoNorth sea Branch of soa , Qingdao

The sporopollen analysis has been made of the 783 samples of the surface sediments collected from the offshore water ares of the western Bohai sea in this paper. Abundant sporopollen is found and three regions of sporopollen assemblage with distinctive features are identified. They are Pinus-Artemisis-Quercus assemblage region in the sea area of shanhaiguan-Yanghekou; Firms-Chenopoeliaceae-Artemisia assemblage region in the sea area of Yanghekou-Nanbao and Chenopodiaceae-Artemisia-Pinus assemblage region in the sea area of Nanbao = Dakouhe. After analysis of and discussion on each assemblage region, it is found that sporopollen assemblages in the sea areas are not only controlled by the coastal vegetation, but also by other natural factors. In this paper emphasis is placed on the influence of the river on sporopollen assemblage. The sporopollen assemblage division proposed in this paper will provide very useful inspiration for dividing the sediment types and studying the hydrodynamic mechanism of the

关键词：旧价曲目胡司卜甲心洲开山山口目的

Urban green spaces accessibility in two European cities:Vilnius(Lithuania)and Coimbra(Portugal)

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Geography and sustainability 2022年第1期3卷 74-84页

作者： Luís Valença Pinto Carla sofia santos Ferreira Miguel Inácio Paulo Pereira Research Centre for Natural Resources Environment and Society(CERNAS)Polytechnic Institute of CoimbraCoimbra Agrarian Technical SchoolCoimbraPortugal Environmental Management Laboratory Mykolas Romeris UniversityVilniusLithuania Department of Physical Geography and Bolin Centre for Climate Research Stockholm UniversitySE-10691 StockholmSweden Navarino Environmental Observatory 24001 MessiniaGreece

Urban green spaces(UGs)are essential for human well-being,contributing towards quality of life and promoting social interactions and *** to recreational UGs is key to human well-being in urban ***,there is a lack of works focused on recreational UGs accessibility in cities from different countries,using different types of *** this work,we studied the accessibility to recreational UGs in Vilnius(Lithuania)and Coimbra(Portugal)through four transport modes(foot,bike,bus and car)within 5-and 10-minute *** results showed important differences between *** had higher accessibility to recreational UGs than Coimbra in all transport *** both cities,the accessibility was highest by car and lowest by ***,the percentage of population covered by 5-and 10-minute distance UGs accessibility in Vilnius is higher than in Coimbra,despite the lower population density in Vilnius.A large number of recreational UGs,their geographic distribution,the dispersed population pattern,and the location of several urbanizations near recreational UGs increased the inhabitant’s accessibility to recreational UGs in *** differences in accessibility between cities were mainly attributed to the large number of recreational UGs and higher road network density,cycleways and footways density,and bus lines in Vilnius,compared to *** work identified the areas where recreational UGs accessibility is difficult in using different transport modes and need to be improved in study *** is essential to support urban planners and increase cities’*** findings of this work will be important for the management of the studied urban areas.

关键词： Recreational UGs Accessibility Transport modes Urban planning Well-being

The effects of the intertropical convergence zone on the easterly jet stream during Northern summer

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Acta Oceanologica sinica 1989年第2期8卷 209-215页

作者： Xu Liang Bao Chenglan Guangdong Institute of Tropical Marine Meteorology, Guangzhou, China Marine Environmental Forecasting Centre of soa, Beijing, China China

In this paper, a strong 1TCZ process and an 1TCZ - absent process during FGGE in 1979 were selected for comparison to explore how they were subject to the influence of the evolution of the upper easterly jets.

关键词： In The effects of the intertropical convergence zone on the easterly jet stream during Northern summer ITCZ

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

significance of trace element quantities in the prostatic secretion of patients with benign prostatic hyperplasia and prostate cancer

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Journal of Cancer Metastasis and Treatment 2019年第6期4卷 35-43页

作者： Vladimir Zaichick sofia Zaichick radionuclide Diagnostics Department Medical Radiological Research CentreObninsk 249036Russia Laboratory of Dr.Gabriela Caraveo Piso Feinberg School of MedicineNorthwestern UniversityChicagoIL 60611USA.

Aim:Benign prostatic hyperplasia and prostate cancer is an internationally important health problem of the man,particularly in developed *** aim of this exploratory study was to evaluate whether significant difference in the levels of Zn and some other trace elements of prostatic fluid exist between the inflamed and malignantly transformed ***:Prostatic fluid levels of Br,Fe,Rb,sr,and Zn were prospectively evaluated in 52 patients with benign prostatic hyperplasia and 24 patients with prostate *** were performed using 109Cd radionuclide-induced energy dispersive X-ray fluorescent *** fluid samples were divided into two *** was used for cytological study to exclude prostatitis,while the other was intended for trace element ***:Mean values±standard error of means for concentration(mg/L)of trace element in the prostatic fluid of hyperplastic prostate were:Br 2.32±0.30,Fe 11.5±1.8,Rb 1.70±0.23,sr 1.41±0.26,and Zn 488±*** contents of Rb and Zn were significantly lower(approximately 3.2 and 7.7 times,respectively)in fluid of cancerous prostate compared with those in fluid of hyperplastic ***:There are significant differences in trace element contents in the fluid of hyperplastic and malignantly transformed *** great decrease in levels of Rb and Zn in the fluid of cancerous prostate might demonstrate ;an involvement of these trace elements in etiology and pathogenesis of malignant prostate *** was supposed that the differences in Rb and Zn levels in prostatic fluid can be used as tumor markers.

关键词： Benign prostatic hyperplasia prostate cancer prostatic fluid trace elements energy-dispersive X-ray fluorescent analysis

study of radioactive status in the Zhujiang estuary and adjacent sea area in south China sea (sCs)

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Acta Oceanologica sinica 1989年第2期8卷 263-272页

作者： Liu Huai, su Xiling, Chen Chi, Gou Min Liang Qianlin Environment Monitoring Center of south China sea, soa, Guangzhou, China China

Through the investigation on radioactive activities of water, sediment and some marine organismsin the Zhujiang estuary, adjacent sea area and the distributary mouths of the Zhujiang River, activities of total α. radioactivity, total β radioactivity, artificial radioactive 90srand 157Cs, and factors inflencing the distribution and the content of U in seawater are *** mainly radioactive pollution substances and their sources in the sea area are studied by γ spectra obtained from sediment in the sea area. The results show that the main radioactivity substances are natural radioactivity U,Th series and 40K. which were produced by the modern industry and transported into the sea through the main current of the Zhujiang River.

关键词： Th study of radioactive status in the Zhujiang estuary and adjacent sea area in south China sea area sCs