GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • MDPI Publishing  (12)
  • Elsevier  (2)
  • Cham :Springer International Publishing AG,  (1)
  • Consejo Superior de Investigaciones Científicas (CSIC)  (1)
  • 1
    Online Resource
    Online Resource
    Cham :Springer International Publishing AG,
    Keywords: Hydraulic engineering. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (605 pages)
    Edition: 2nd ed.
    ISBN: 9783319526638
    Series Statement: Springer Series in Synergetics Series
    DDC: 530.417
    Language: English
    Note: Intro -- Preface of the Second Edition -- Preface of the First Edition -- Contents -- 1 Introduction -- 1.1 Interfacial Pattern Formation in Dendritic Growth and Hele-Shaw Flow -- 1.2 A Brief Review of the Theories of Free Dendritic Growth -- 1.2.1 Maximum Velocity Principle (1976) -- 1.2.2 Marginal Stability Hypothesis (1978) -- 1.2.3 Microscopic Solvability Condition (MSC) Theory (1986-1990s) -- 1.2.4 Interfacial Wave (IFW) Theory (1990) -- 1.3 Macroscopic Continuum Model -- 1.3.1 Macroscopic Transport Equations -- 1.3.2 The Interface Conditions -- 1.3.3 The Scaling and the Dimensionless System -- References -- 2 Unidirectional Solidification and Mullins-Sekerka Instability -- 2.1 Solidification with Planar Interface from a Pure Melt -- 2.1.1 Basic Steady-State Solution -- 2.1.2 Unsteady Perturbed Solutions and Mullins-Sekerka Instability -- 2.1.2.1 Zeroth-Order Approximation Solutions -- 2.1.2.2 First-Order Approximation Solutions -- 2.1.3 Asymptotic Solutions in the Long-Wave Regime, k=O() -- 2.1.3.1 O(0) -- 2.1.3.2 O(2) -- 2.1.4 Asymptotic Solutions in the Extremely Short-Wave Regime, k=O(1) -- 2.1.4.1 O(0) -- 2.1.4.2 O(2) -- 2.2 Unidirectional Solidification from a Binary Mixture -- 2.2.1 Mathematical Formulation of the Problem -- 2.2.2 Basic Steady State -- 2.2.3 Unsteady Perturbed Solutions -- 2.2.3.1 Zeroth-Order Approximation Solutions -- 2.2.3.2 First-Order Approximation Solutions -- 2.2.4 Asymptotic Solutions in the Long-Wave Regime, k=O() -- 2.2.5 Asymptotic Solutions in the Extremely Short-Wave Regime, k= O(1/E) -- g=O(1/E) -- 2.2.6 Some Remarks on Unidirectional Solidification -- References -- 3 Mathematical Formulation of Free Dendritic Growth from a Pure Melt -- 3.1 Three-Dimensional Free Dendritic Growth -- 3.2 Axisymmetric Free Dendrite Growth -- 3.3 Two-Dimensional Free Dendritic Growth -- Reference. , 4 Basic Steady State of Axisymmetric Dendritic Growth and Its Regular Perturbation Expansion -- 4.1 The Ivantsov Solution and Unsolved Fundamental Problems -- 4.2 Axially Symmetric Steady Needle Growth with Nonzero Surface Tension -- 4.2.1 Mathematical Formulation -- 4.2.2 Regular Perturbation Expansion Solutions (RPE) as E→0 -- 4.2.2.1 The Zeroth-Order Approximation O(0) -- 4.2.2.2 The First-Order Approximation O(2) -- 4.2.3 The Asymptotic Behavior of the Regular Perturbation Expansion Solution as ξ→∞ -- 4.2.4 Some Numerical Results of the Interface Shape -- 4.3 Summary and Discussion -- References -- 5 The Steady State for Dendritic Growth with Nonzero Surface Tension -- 5.1 The Nash-Glicksman Problem and the Classical Needle Crystal Solution -- 5.2 The Geometric Model and Solutions of NeedleCrystal Growth -- 5.2.1 Geometric Model of Dendritic Growth -- 5.2.2 The Segur-Kruskal Problem -- 5.2.3 Steady Nonclassical Needle Growth Problem -- 5.2.3.1 The Outer Expansion -- 5.2.3.2 The Composite Solution -- 5.2.3.3 The Properties of the Composite Solutions -- 5.2.4 Needle Crystal Formation Problem -- 5.3 The Nonclassical Steady State of Dendritic Growth with Nonzero Surface Tension -- 5.3.1 The Complete Mathematical Formulation for Free Dendrite Growth -- References -- 6 Global Interfacial Wave Instability of Dendritic Growth from a Pure Melt -- 6.1 Linear Perturbed System Around the Basic State of Axisymmetric Dendritic Growth -- 6.2 Outer Solution in the Outer Region Away from the Tip -- 6.2.1 Zeroth-Order Approximation -- 6.2.2 First-Order Approximation -- 6.2.3 Singular Point ζc of the Outer Solution -- 6.3 The Inner Solutions near the Singular Point ζc -- 6.4 Tip Inner Solution in the Tip Region -- 6.5 Global Trapped-Wave Modes and the Quantization Condition -- 6.6 Comparison of Theoretical Predictions with Experimental Data. , 6.6.1 The Dendrite Tip Velocity and Tip Radius -- 6.6.2 The Critical Number * -- 6.6.3 The Universal Scaling Parameter, * or σ*? -- 6.6.4 The Nature of the Dendrite-Tip: Steady or Oscillatory? -- 6.7 Three-Dimensional Nonaxisymmetric Spiral Dendritic Modes of Perturbed States -- 6.7.1 Mathematical Formulation of General Three-Dimensional Unsteady Dendritic Growth -- 6.7.2 The Basic State for Dendritic Growth with Nonzero Surface Tension -- 6.7.3 3D Linear Perturbed System -- 6.7.4 Multiple Variables Expansion Solution in the Outer Region -- 6.7.5 Zeroth-Order Approximation of Outer Solution -- 6.7.6 First-Order Approximation of the Outer Solution -- 6.7.7 The Inner Solution near the Singular Point ζc of the Outer Solution -- 6.7.8 Tip Inner Solution in the Tip Region -- 6.7.9 Global Trapped-Wave (GTW) Modes and Quantization Condition -- 6.8 A Brief Summary -- References -- 7 Free Dendritic Growth with Anisotropy -- 7.1 Mathematical Formulation for 2D Dendritic Growth with Anisotropy of Surface Tension -- 7.2 RPE for Basic Steady-State Solutions -- 7.2.1 The Zeroth-Order Approximation (=0) -- 7.2.2 The First-Order Approximation, O(2) -- 7.2.3 Asymptotic Behavior of the Regular Perturbation Expansion Solution as ξ→∞ -- 7.3 Global Interfacial Wave Instabilities of Two-Dimensional Dendritic Growth -- 7.3.1 Linear Perturbed System Around the Basic State -- 7.3.2 Multivariable Expansion Solution in the Outer Region -- 7.3.2.1 Zeroth-Order Approximation -- 7.3.2.2 First-Order Approximation -- 7.3.3 The Inner Equation near the Singular Point ζc -- 7.3.3.1 Case I: |σ0| = O(1) -- 7.3.3.2 Case II: |σ0| 1 -- 7.3.3.3 A Brief Summary -- 7.3.4 Matching Procedure and Connection Conditions -- 7.4 The Quantization Condition of Global Trapped-Wave Modes -- 7.5 The Quantization Condition of Global Low-FrequencyModes. , 7.6 The Selection Conditions for 2D Dendritic Growth -- 7.7 The Effect of Kinetic Attachment at the Interface on Dendritic Growth -- 7.7.1 Linear Perturbed System Around the Basic State -- 7.7.2 The Complex Spectrum of Eigenvalues with |σ0|=O(1) and GTW Instability -- 7.7.2.1 Zeroth-Order Approximation Solutions for GTW Instability -- 7.7.2.2 First-Order Approximation Solutions for GTW Instability -- 7.7.3 The Real Spectrum of Eigenvalues with |σ0|1 and LF Instability -- 7.8 Axially Symmetric Dendritic Growth with Anisotropy -- References -- 8 Three Dimensional Dendritic Growth from an Undercooled Binary Mixture -- 8.1 Mathematical Formulation of the Problem -- 8.2 Basic Steady-State Solution of the System -- 8.2.1 The Zeroth-Order Approximation Solution -- 8.3 Three-Dimensional Linear Perturbed States Around the Basic State -- 8.4 Multiple Variables Expansion Solution in the Outer Region -- 8.5 The MVE Solutions in the Outer Region -- 8.5.1 The Zeroth-Order Approximation -- 8.5.2 First-Order Approximation -- 8.6 The Inner Solutions near the Singular Point ζc -- 8.6.1 Leading-Order Approximation -- 8.7 Tip Inner Solution in the Tip Region -- 8.8 Global Trapped-Wave (GTW) Modes and QuantizationCondition -- 8.9 Axisymmetric Global Modes (m=0) -- 8.10 Comparisons of Theoretical Results with Experimental Data -- References -- 9 Viscous Fingering in a Hele-Shaw Cell -- 9.1 Introduction -- 9.2 Mathematical Formulation of the Problem -- 9.3 The Smooth Finger Solution with Zero Surface Tension -- 9.4 Mathematical Formulation of the Problem with Zero Surface Tension -- 9.4.1 The System of Curvilinear Coordinates (ξ, η) -- 9.4.2 Mathematical Formulation of the Problem in the (ξ,η) Coordinate System -- 9.4.3 The Regular Perturbation Expansion Solution for the Basic State as →0 -- 9.5 The Linear Perturbed System and the Outer Solutions. , 9.5.1 The Linear Perturbed System and the Multiple Variables Expansions -- 9.5.2 The Zeroth-Order Approximation Solutions -- 9.6 The Inner Equation near the Singular Point ζc -- 9.6.1 Case I: |σ0| = O(1) -- 9.6.2 Case II: |σ0| 1 -- 9.7 Eigenvalue Spectra and Instability Mechanisms -- 9.7.1 The Spectrum of Complex Eigenvalues and GTW Instability -- 9.7.1.1 Range 1: 12 ≤λ0 < -- 1 or 0 ≤a< -- 1 -- 9.7.1.2 Range 2: 0 < -- λ0 < -- 12 or a > -- 1 -- 9.7.2 The Spectrum of Real Eigenvalues and LF Instability -- 9.8 Fingering Flow with a Nose Bubble -- 9.8.1 The Basic State of Finger Formation with a Nose Bubble and Its Linear Perturbation -- 9.8.2 The Quantization Conditions for the System with a Nose Bubble -- 9.8.2.1 The GTW Mechanism -- 9.8.2.2 The LF Mechanism -- 9.9 The Selection Criteria of Finger Solutions -- Appendix: The Forms of Some Operators in the System of the Curvilinear Coordinate System (ξ,η) -- References -- 10 Spatially Periodic Deep-Cellular Growth -- 10.1 Introduction -- 10.2 Steady State of the System of Deep-Cellular Growth from a Binary Mixture -- 10.2.1 Mathematical Formulation of the Problem -- 10.2.2 Mathematical Formulation of the Problem in a Curvilinear Coordinate System (ξ, η) -- 10.2.3 The Basic Steady-State Solutions in the Far Field -- 10.2.4 The Mathematical Formulation of the Problem in the Near Field -- 10.2.5 Generalized Asymptotic Solution in the Outer Region -- 10.2.6 Regular Perturbation Expansion of the Solution in the Outer Region -- 10.2.6.1 Zeroth-Order Approximation O(ε0) -- 10.2.6.2 First-Order Approximation O(ε1) -- 10.2.6.3 The Second-Order Approximation O(ε2) -- 10.2.6.4 The Third-Order Approximation O(ε3) -- 10.2.7 Singular Perturbation Expansion Part of the Solution in the Outer Region -- 10.3 The Inner Steady-State Solution in the Root Region and Interface Closure of Deep Cellular Growth. , 10.3.1 Mathematical Formulation of the Problem in the Root Region.
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Chinese Astronomy 4 (1980), S. 243-250 
    ISSN: 0146-6364
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Ultrasonics 31 (1993), S. 39-44 
    ISSN: 0041-624X
    Keywords: cavitation ; pulse width ; small-size reverberation field
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2015-09-03
    Description: Human papillomavirus (HPV) are firmly established as the principal causative agent for cervical carcinoma. Current vaccines may provide some protection for women from cervical carcinoma linked to HPV genotype 16 and 18. This may be the best vaccine for Western women, but the geographical variation in HPV distributions may not make it the most appropriate vaccine for China or Asia. This study provided an observational, retrospective, hospital-based cross-sectional study on the distribution of HPV genotypes among 5410 women with invasive cervical cancer (ICC) or cervical intraepithelial neoplasia (CIN). Overall, the positive rates of the four HPV types included in current prophylactic vaccines were counted, the two high-risk types (HPV-16 and -18) covered by current vaccines represented 66.9% of women with squamous cancer, 55.0% with adenocarcinoma, 64.9% with adenosquamous carcinoma and 77.4% of other type ICC, as well as 59.5% of CIN III, 45.0% of CIN II and 38.1% of CIN I cases. As expected, two low-risk types (HPV-6 and -11) included in the quadrivalent vaccine did not show good coverage data. Particularly worth mentioning is the fact that the addition of HPV-52 and -58 to the vaccine cocktail would increase cancer protection in our population, potentially preventing up to beyond 16% of squamous/adenosquamous carcinoma and other type of cervical cancers, and 7.75% of adenocarcinomas. It might also potentially reduce the rate of CIN III by a further 28.6% and CIN II and I by a third. This study established the baseline for surveillance in Zhejiang Province, and provides data for further vaccine designs: a quadrivalent HPV vaccine covering HPV-16/-58/-18/-52, would be more welcome in our region in the forthcoming year compared to the currently available vaccine.
    Print ISSN: 1661-7827
    Electronic ISSN: 1660-4601
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2012-10-24
    Description: Desde la fundación de la República Popular China el Gobierno Central ha estado buscando la vía más adecuada para conseguir el desarrollo regional. En el período de Mao el enfoque adoptó una perspectiva principalmente administrativa, tratando de mejorar la estructura de división y de gobierno del país. Con el inicio del período de reforma y apertura, el acento cambia al diseño de estrategias de desarrollo regional, aunque con tendencias cambiantes que van desde las políticas redistributivas hasta el modelo de desarrollo asimétrico, y los esfuerzos por combatir las desigualdades entre regiones y entre áreas urbanas y rurales de China. Este artículo realiza una revisión de los cambios producidos en China a través de todos estos procesos de regionalización, proporcionando un marco de referencia para comprender las diferentes etapas y ayudar a estudios más específicos sobre este país. [fr] À partir de la fondation de la République populaire de Chine le gouvernement central a cherché le moyen le plus approprié pour atteindre le développement régional. Dans la période de Mao l'approche essentiellement adoptée fut un point de vue administratif, en essayant d'améliorer la structure de la division et le gouvernement du pays. Avec le début de la réforme et la période d'ouverture, les directives changent vers la conception de stratégies de développement régional, mais avec une évolution des tendances allant depuis les politiques de redistribution jusqu'au modèle de développement asymétrique, et les efforts pour lutter contre les inégalités entre les régions et entre les zones urbaines et rurales de La Chine. Cet article passe en revue les changements en Chine à travers tous ces processus de régionalisation, en fournissant un cadre pour comprendre les différentes étapes et pour aider les études plus spécifiques sur ce pays.
    Print ISSN: 0014-1496
    Electronic ISSN: 1988-8546
    Topics: Geography
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2018-03-09
    Description: Energies, Vol. 11, Pages 586: Using SoC Online Correction Method Based on Parameter Identification to Optimize the Operation Range of NI-MH Battery for Electric Boat Energies doi: 10.3390/en11030586 Authors: Bumin Meng Yaonan Wang Jianxu Mao Jianwen Liu Guochang Xu Jian Dai This paper discusses a design of a Battery Management System (BMS) solution for extending the life of Nickel-Metal Hydride (NI-MH) battery. Combined with application of electric boat, a State of Charge (SoC) optimal operation range control method based on high precision energy metering and online SoC correction is proposed. Firstly, a power metering scheme is introduced to reduce the original energy measurement error. Secondly, by establishing a model based parameter identification method and combining with Extended Kalman Filter (EKF) method, the estimation accuracy of SoC is guaranteed. Finally, SoC optimal operation range control method is presented to make battery running in the optimal range. After two years of operation, the battery managed by proposed method has much better status, compared to batteries that use AH integral method and fixed SoC operating range. Considering the SoC estimation of NI-MH battery is more difficult becausing special electrical characteristics, proposed method also would have a very good reference value for other types of battery management.
    Electronic ISSN: 1996-1073
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2018-07-09
    Description: Energies, Vol. 11, Pages 1790: Infeasibility Analysis of Half-Wavelength Transmission Systems Energies doi: 10.3390/en11071790 Authors: Zheng Xu Jian Yang Nengjin Sheng This paper analyzes the infeasibility of half-wavelength transmission systems in the aspects of power-frequency overvoltage and synchronization stability. The circuit model of the long-distance transmission system is established at first for steady-state and transient analysis. The sending-end system and the receiving-end system are both considered in the model. A test system based on an actual transmission line is given to facilitate the description of system characteristics. Based on the circuit model, the resonant transmission distance of the system is found and calculated. Theoretical analysis and numerical calculations are carried out to determine the feasibility transmission distance. It is demonstrated that the transmission distance should be in a certain range, which is larger than the resonant transmission distance, to satisfy the steady-state overvoltage and the small signal synchronization stability as well as the frequency deviation constraints. For transmission distances in the feasible range, the three-phase short circuit fault at a certain point of the transmission line will cause the most serious transient power-frequency overvoltage, and the system is very likely to lose synchronization stability. Considering the transient power-frequency overvoltage and the transient synchronization stability, the half-wavelength transmission system is technically impossible to operate.
    Electronic ISSN: 1996-1073
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2018-08-23
    Description: Sensors, Vol. 18, Pages 2761: A Novel Coordinated Motion Fusion-Based Walking-Aid Robot System Sensors doi: 10.3390/s18092761 Authors: Wenxia Xu Jian Huang Lei Cheng Human locomotion is a coordinated motion between the upper and lower limbs, which should be considered in terms of both the user&amp;rsquo;s normal walking state and abnormal walking state for a walking-aid robot system. Therefore, a novel coordinated motion fusion-based walking-aid robot system was proposed. To develop the accurate human motion intention (HMI) of such robots when the user is in normal walking state, force-sensing resistor (FSR) sensors and a laser range finder (LRF) are used to detect the two HMIs expressed by the user&amp;rsquo;s upper and lower limbs. Then, a fuzzy logic control (FLC)-Kalman filter (LF)-based coordinated motion fusion algorithm is proposed to synthesize these two segmental HMIs to obtain an accurate HMI. A support vector machine (SVM)-based fall detection algorithm is used to detect whether the user is going to fall and to distinguish the user&amp;rsquo;s falling mode when he/she is in an abnormal walking state. The experimental results verify the effectiveness of the proposed algorithms.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2015-01-06
    Description: This paper focuses on suppressing spectral overlap for sub-band spectral estimation, with which we can greatly decrease the computational complexity of existing spectral estimation algorithms, such as nonlinear least squares spectral analysis and non-quadratic regularized sparse representation. Firstly, our study shows that the nominal ability of the high-order analysis filter to suppress spectral overlap is greatly weakened when filtering a finite-length sequence, because many meaningless zeros are used as samples in convolution operations. Next, an extrapolation-based filtering strategy is proposed to produce a series of estimates as the substitutions of the zeros and to recover the suppression ability. Meanwhile, a steady-state Kalman predictor is applied to perform a linearly-optimal extrapolation. Finally, several typical methods for spectral analysis are applied to demonstrate the effectiveness of the proposed strategy.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2016-07-09
    Description: Precise Point Positioning (PPP) makes use of the undifferenced pseudorange and carrier phase measurements with ionospheric-free (IF) combinations to achieve centimeter-level positioning accuracy. Conventionally, the IF ambiguities are estimated as float values. To improve the PPP positioning accuracy and shorten the convergence time, the integer phase clock model with between-satellites single-difference (BSSD) operation is used to recover the integer property. However, the continuity and availability of stand-alone PPP is largely restricted by the observation environment. The positioning performance will be significantly degraded when GPS operates under challenging environments, if less than five satellites are present. A commonly used approach is integrating a low cost inertial sensor to improve the positioning performance and robustness. In this study, a tightly coupled (TC) algorithm is implemented by integrating PPP with inertial navigation system (INS) using an Extended Kalman filter (EKF). The navigation states, inertial sensor errors and GPS error states are estimated together. The troposphere constrained approach, which utilizes external tropospheric delay as virtual observation, is applied to further improve the ambiguity-fixed height positioning accuracy, and an improved adaptive filtering strategy is implemented to improve the covariance modelling considering the realistic noise effect. A field vehicular test with a geodetic GPS receiver and a low cost inertial sensor was conducted to validate the improvement on positioning performance with the proposed approach. The results show that the positioning accuracy has been improved with inertial aiding. Centimeter-level positioning accuracy is achievable during the test, and the PPP/INS TC integration achieves a fast re-convergence after signal outages. For troposphere constrained solutions, a significant improvement for the height component has been obtained. The overall positioning accuracies of the height component are improved by 30.36%, 16.95% and 24.07% for three different convergence times, i.e., 60, 50 and 30 min, respectively. It shows that the ambiguity-fixed horizontal positioning accuracy has been significantly improved. When compared with the conventional PPP solution, it can be seen that position accuracies are improved by 19.51%, 61.11% and 23.53% for the north, east and height components, respectively, after one hour convergence through the troposphere constraint fixed PPP/INS with adaptive covariance model.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...