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The role of technological innovation,carbon finance,green energy,environmental awareness and urbanization towards carbon neutrality:Evidence from novel CUP-FM CUP-BC estimations

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Geoscience Frontiers 2024年第4期15卷 347-358页

作者： FengSheng chien School of Finance Fuzhou University of International Studies and TradeFuzhouChina Faculty of Business City University of MacaoMacaoChina Carbon Economy Research Center Fuzhou University of International Studies and TradeFuzhouChina

After COP21,various economies start putting efforts to fulfill the pledge and achieve carbon *** doing so,scholars highlight several essential factors that can curb carbon *** this lieu,the current study analyzes the role of technological innovation,carbon finance,environmental awareness,urbanization,and green energy like renewable energy consumption(REC)and renewable energy output(REO)on carbon neutrality in E7 countries covering the time span of *** employing CUP-FM and CUP-BC,it is revealed that technological innovation,carbon finance,environmental awareness,urbanization,REC,and REO have a positive connection with carbon neutrality in E7 *** study provides guidelines to the policymakers in developing policies regarding to obtain carbon neutrality using technological innovation,carbon finance,environmental awareness,and green energy.

关键词： Technological innovation Carbon finance Environmental awareness Urbanization Green energy Carbon neutrality

Turbulence and cavitation models for time-dependent turbulent cavitating flows

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Acta Mechanica Sinica 2011年第4期27卷 473-487页

作者： chien-Chou Tseng Department of Mechanical Engineering University of Michigan

Cavitation typically occurs when the fluid pressure is lower than the vapor pressure at a local thermodynamic state, and the flow is frequently unsteady and turbulent. To assess the state-of-the-art of computational capabilities for unsteady cavitating flows, different cavitation and turbulence model combinations are conducted. The selected cavitation models include several widely-used models including one based on phenomenological argument and the other utilizing interface dynamics. The k-e turbulence model with additional implementation of the filter function and density correction function are considered to reduce the eddy viscosity according to the computed turbulence length scale and local fluid density respectively. We have also blended these alternative cavitation and lustrate that the eddy viscosity turbulence treatments, to ilnear the closure region can significantly influence the capture of detached cavity. From the experimental validations regarding the force analysis, frequency, and the cavity visualization, no single model combination performs best in all aspects. Furthermore, the implications of parameters contained in different cavitation models are investigated. The phase change process is more pronounced around the detached cavity, which is better illustrated by the interfacial dynamics model. Our study provides insight to aid further modeling development.

关键词： Cavitation Turbulence model Cavitationmodel Hybrid model

Double-lined M dwarf eclipsing binaries from Catalina Sky Survey and LAMOST

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Research in Astronomy and Astrophysics 2017年第2期17卷 29-34页

作者： chien-Hsiu Lee chien-Cheng Lin Subaru Telescope National Astronomical Observatory of Japan Shanghai Astronomical Observatory Chinese Academy of Sciences

Eclipsing binaries provide a unique opportunity to determine fundamental stellar properties. In the era of wide-field cameras and all-sky imaging surveys, thousands of eclipsing binaries have been reported through light curve classification, yet their basic properties remain unexplored due to the ex- tensive efforts needed to follow them up spectroscopically. In this paper we investigate three M2-M3 type double-lined eclipsing binaries discovered by cross-matching eclipsing binaries from the Catalina Sky Survey with spectroscopically classified M dwarfs from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope survey data release one and two. Because these three M dwarf binaries are faint, we further acquire radial velocity measurements using GMOS on the Gemini North telescope with R ~4000, enabling us to determine the mass and radius of individual stellar components. By jointly fitting the light and radial velocity curves of these systems, we derive the mass and radius of the primary and secondary components of these three systems, in the range between 0.28-0.42 MQ and 0.29-0.67 R, respectively. Future observations with a high resolution spectrograph will help us pin down the uncertainties in their stellar parameters, and render these systems benchmarks to study M dwarfs, providing inputs to improving stellar models in the low mass regime, or establishing an empirical mass-radius relation for M dwarf stars.

关键词： (stars) binaries eclipsing

The culture and establishment of embryonic germ(EG)cell lines from Chinese mini swine

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Cell Research 2003年第3期13卷 195-202页

作者： HSIAO chien TSUNG Shanghai Institutes for Biologcal Sciences of Biochemistry and Cell Biology Chinese Academy of Sciences Shanghai 200031 Institute Laboratory of Embryonic Stem Cell China

As a part of a basic research project on Xeno-transplantion,we have been engaged in the derivation ofembryonic stem cell lines from Chinese mini ***,we reported for the first time the establishmentof two porcine EG cell lines(BPEG1 and BPEG2)from primordial germ cells of genital ridges of a 28 anda 27 d embryos *** pluripotent nature has been identified by colony morphology,markercharacterization as well as well as by in vitro and in vivo *** porcine EG cells are potentiallyuseful for further basic studies.

关键词： primordial germ cells EG cells porcine Chinese mini swine.

On Three Differential Equations Associated with Chebyshev Polynomials of Degrees 3,4 and 6

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Acta Mathematica Sinica,English Series 2017年第1期33卷 21-36页

作者： Li chien SHEN Department of Mathematics University of Florida Gainesville FL 32611-8105

We shall study the differential equation y^l2=Tn（y）-（1-2μ2）;where μ2 is a constant, Tn（x） are the Chebyshev polynomials with n = 3,4,6. The solutions of the differential equations will be expressed explicitly in terms of the Weierstrass elliptic function which can be used to construct theories of elliptic functions based on 2F1 （1/4, 3/4; 1; z）, 2F1 （l/3, 2/3; 1; z）, 2F1 （1/6, 5/6; 1; z） and provide a unified approach to a set of identities of Rmanujan involving these hypergeometric functions.

关键词： Chebyshev polynomials Eisenstein series Jacobi theta functions Weierstrass ellipticfunction

Landslide and Basin Self-organized Criticality in the Lushan Hot Spring Area

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Journal of Mountain Science 2012年第4期9卷 463-471页

作者： chien-Yuan CHEN Department of Civil and Water Resources Engineering Taiwan Chiayi University

Defining a basin under a critical state （or a self-organized criticality） that has the potential to initiate landslides, debris flows, and subsequent sediment disasters, is a key issue for disaster prevention. The Lushan Hot Spring area in Nantou County, Taiwan, suffered serious sediment disasters after typhoons Sinlaku and Jangmi in aoo8, and following Typhoon Morakot in 2009. The basin＇s internal slope instability after the typhoons brought rain was examined using the landslide frequency-area distribution. The critical state indices attributed to landslide frequency-area distribution are discussed and the marginally unstable characteristics of the study area indicated. The landslides were interpreted from Spot 5 images before and after disastrous events. The results of the analysis show that the power-law landslide frequency-area curves in the basin for different rainfall-induced events tend to coincide with a single line. The temporal trend of the rainfall- induced landslide frequency-area distribution shows 1If noise and scale invariance. A trend exists for landslide frequency-area distribution in log-log space for larger landslides controlled by the historical maximum accumulated rainfall brought by typhoons. The unstable state of the basin, including landslides, breached dams, and debris flows, are parts of the basin＇s self-organizing processes. The critical state of landslide frequency-area distribution could be estimated by a critical exponent of 1.0. The distribution could be used for future estimation of the potential landslide magnitude for disaster mitigation and to identify the current state of a basin for management.

关键词： Landslide Debris flow Power law Self-organized criticality

On Schwarzian Triangle Functions, Automorphic Forms and a Generalization of Ramanujan’s Triple Differential Equations

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Acta Mathematica Sinica,English Series 2018年第11期34卷 1648-1662页

作者： Li chien SHEN Department of Mathematics University of Florida

Let G be the group of the fractional linear transformations generated by T（τ）=τ ＋ λ, S（τ）=（τ cos π/n ＋ sin π/n）/（-τ sin π/n ＋ cos π/n）;where λ=2（cos π/m ＋ cos π/n）/sin π/n;m, n is a pair of integers with either n ≥ 2, m ≥ 3 or n ≥ 3, m ≥ 2; τ lies in the upper half plane H.A fundamental set of functions f0, fi and f∞ automorphic with respect to G will be constructed from the conformal mapping of the fundamental domain of G. We derive an analogue of Ramanujan＇s triple differential equations associated with the group G and establish the connection of f0, fi and f∞ with a family of hypergeometric functions.

关键词： Hypergeometric function Schwarzian triangle function Jacobi theta functions Ramanu-jan's triple differential equations

Parametric studies on relationships between flutter derivatives of slender bridge(Ⅱ)

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Applied Mathematics and Mechanics(English Edition) 2009年第2期30卷 335-341页

作者：徐旭 Wei-zang chien Department of Civil Engineering Shanghai University Shanghai 200072 P. R. China 不详

Based on curve fitting of coefficients of three component forces of the Messina Straits Bridge, and the previously proposed semi-analytical expressions of flutter derivatives of flexible structure, the change of flutter derivatives of slender bridge cross-section with respect to its aerodynamic center, rotational speed and angle variation is studied using a parametric method. The calculated results are compared with the measured ones, and expressions of flutter derivatives of the Messina Straits Bridge are derived. The intrinsic relationships existing in flutter derivatives are validated again. It is shown that the influence of the rotational speed on flutter derivatives is not negligible. Therefore, it provides an additional semi-analytical approach for analyzing flutter derivatives of the bridge with streamlined cross-section to get its aerodynamic information.

关键词： flutter derivative slender bridge parametric analysis

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Non-invasive measurement and validation of tissue oxygen saturation covered with overlying tissues

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Progress in Natural Science:Materials International 2008年第9期18卷 1083-1088页

作者： Jenchung chien Betau Hwang Department of Pediatrics Taipei Veterans General Hospital Taipei China

In this paper, the biological tissue oxygen saturation (rSO2) is obtained non-invasively and in real time based on near infrared spec-troscopy (NIRS) using two emitting wavelengths and two detectors, where the tissue is covered with overlying *** group devel-oped an NIRS oximeter based on the above principle independently, and validated it using liquid tissue model calibrations and animal *** results indicate that (1) in the normal range of tissue oxygen saturation (40-70%), the rSO2 measured by NIRS is accu-rate enough and little infiuenced by the background absorptions (such as the absorption of water) and overlying tissues (such as fat);(2) during cerebral hypoxia and recovery of three piglets, there is excellent correlation (p < 0.001) between cerebral rSO2 and jugular venous oxygen saturation (SjO2), meaning that the rSO2 can be indicated by the SjO2 to a large extent;during the death of the three piglets induced by heart beat stopping, cerebral rSO2 decreases continuously to significantly low levels (<25%) because cerebral blood supply does not exist any *** the above results are of explicit physiological importance.

关键词： Tissue oxygen saturation Jugular venous oxygen saturation Overlying tissues Non-invasive measurement