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  • 1
    Call number: MOP 46037 / Mitte
    Type of Medium: Monograph available for loan
    Pages: 172 Seiten , Illustrationen , 21 cm
    Language: English
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    Leipzig : Deutscher Verlag für Grundstoffindustrie
    Call number: G 8201 ; 8414 ; G 8202
    Type of Medium: Monograph available for loan
    Pages: 208 Seiten , Illustrationen
    Edition: 2., durchgesehene Auflage
    Language: German
    Note: Inhaltsverzeichnis 1. Fehlerarten in der analytischen Chemie 2. Empirische Häufigkeitsverteilungen 2.1. Diskussion empirischer Häufigkeitsverteilungen 2.2. Statistische Kennzahlen 2.2.1. Mittelwerte 2.2.2. Streuungsmaße 2.2.3. Schiefe und Exzeß 2.2.4. Tabellarische Berechnung von arithmetischem Mittel und Standardabweichung 2.3. Zweidimensionale Verteilungen 3. Theoretische Verteilungen 3.1. Gaußverteilung 3.2. Poissonverteilung 3.3. Prütverteilungen 3.3.1. t-Verteilung 3.3.2. F -Verteilung 3.3.3. X2-Verteilung 3.4. Zusammenhang zwischen den einzelnen Verteilungen 4. Fehlerfortpflanzung 4.1. Gravimetrie 4.2. Maßanalyse 4.3. Photometrie 4.4. Indirekte Verfahren 4.5. Zählverfahren 4.6. Probenahme 5. Zufallsfehler von Analysenverfahren 5.1. Berechnung der Standardabweichung 5.2. Aussage 6. Beurteilung von Analysenwerten 6.1. Berechnung und Aussage des Vertrauensintervalles 6.2. Statistische Qualitätsbeurteilung 7. Statistische Prüfverfahren 7.1. Vergleich zweier Standardabweichungen (F-Test) 7.2. Vergleich mehrerer Standardabweichungen (Bartlett-Test) 7.3. Vergleich zweier Mittelwerte (t-Test) 7.4. Vergleich von Häufigkeiten 7~5. Ausreißernachweis 7.6. Prüfen empirischer Verteilungen 8. Behandlung inhomogenen Zahlenmaterials (einfache Varianzanalyse) 8.1. Zufallsfehler bei mehr als einer Fehlerursache 8.2. Fehlerauflösung 8.3. Vergleich mehrerer Mittelwerte 9. Statistik der Geraden (Regressions- und Korrelationsanalyse) 9.1. Bestimmung der Konstanten 9.2. Prüfung der Konstanten 9.3. Linearitätsprüfung 9.4. Prüfung auf gegenseitige Abhängigkeit zweier Variablen (Korrelationsrechnung) 10. Zum numerischen Rechnen 11. Abschließende Betrachtungen Literaturverzeichnis . 12. Tabellenanhang Tabelle 12.1. Ordinatenwerte der Gaußverteilung Tabelle 12.2. Gaußsches Integral Tabelle 12.3. Integralgrenzen der t-Verteilung Tabelle 12.4. Integralgrenzen der x2 -Verteilung Tabelle 12.5. Integralgrenzen der F-Verteilung Tabelle 12.6. Grenzwerte zum Duncan-Test Tabelle 12.7. Quadratzahfen von 1 bis 1000 Tabelle 12.8. Reziprokzahlen von 1 bis 1000 Sachwörterverzeichnis
    Location: Upper compact magazine
    Location: Upper compact magazine
    Location: Upper compact magazine
    Branch Library: GFZ Library
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 3
    Call number: MOP 45384/5 / Mitte
    In: WMO TD / World Meteorological Organization, No. 1
    Type of Medium: Series available for loan
    Pages: ii, 52 Seiten , 29 cm
    Series Statement: WMO TD / World Meteorological Organization 1
    Language: English
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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  • 4
    Series available for loan
    Series available for loan
    Hanover, NH : U.S. Army Cold Regions Research and Engineering Laboratory
    Associated volumes
    Call number: ZSP-201-80/9
    In: CRREL Report, 80-9
    Description / Table of Contents: Explosive cratering tests were conducted in seasonally frozen and thawed gravel at Ft. Richardson near Anchorage, Alaska, and in seasonallly frozen and thawed silt overlying permafrost and in silt permafrost at Ft. Wainwright near Fairbanks, Alaska. Explosive charge weights ranged from 26 to 3120 lb and charge burial depths ranged from about 3 to 40 ft. The cube root of the charge weight scaling was used to determine maximum scaled crater dimensions and optimum scaled depth of burial of the charge. Test results for frozen and thawed gravel were essentially the same because of the low moisture content and the relatively shallow depth of freezing (5 to 6 ft). The optimum depth of burial of the charge for maximizing the apparent radius and depth and the true radius was about 1.8 times the cube root of the charge weight for both the frozen and thawed conditions. In seasonally frozen silt overlying a talik and silt permafrost the maximum scaled crater dimensions and optimum scaled burial depths of the charge were smaller than for the thawed condition except for the true crater dimensions. The channeling of energy in the talik produces maximum crater dimensions and an optimum burial depth for the true crater that is larger than for the thawed condition. The results for the homogeneous silt permafrost were very similar to the frozen gravel results with much smaller maximum crater dimensions and smaller optimum charge burial depths than for the thawed silt overlying permafrost.
    Type of Medium: Series available for loan
    Pages: v, 21 Seiten , Illustrationen
    Series Statement: CRREL Report 80-9
    Language: English
    Note: CONTENTS Abstract Preface Metric conversion table Introduction Test sites Test procedures and materials Analysis of test data Mobility tests Conclusions Literature cited
    Location: AWI Archive
    Branch Library: AWI Library
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  • 5
    Call number: ZSP-201-80/8
    In: CRREL Report, 80-8
    Description / Table of Contents: This report presents the results of the tests on the new U.S. Coast Guard 140-ft icebreaker Katmai Bay (WTGB-101) in the level plate ice and brash ice in Whitefish Bay and the St. Marys River. The results indicate that the vessel can penetrate 22 in. of level freshwater ice with 2-3 in. of snow cover. It can also penetrate up to 48 in. of brash ice in a continuous mode and at least 30 in. of plate ice by backing and ramming. The installed bubbler system decreased the required power of the vessel from 10 to 30% in brash ice and 25 to 35% in level ice. The low friction coating appears to be effective in decreasing the friction factor when it remains intact; when it peels off it appears to make conditions worse than plain paint. An average dynamic friction factor of 0.15 could be used over the entire hull for these tests.
    Type of Medium: Series available for loan
    Pages: iv, 28 Seiten , Illustrationen
    Series Statement: CRREL Report 80-8
    Language: English
    Note: CONTENTS Abstract Preface Metric conversion table Introduction Roughness and friction measurements Level plate ice performance Brash ice performance Ramming icebreaking performance Analysis of the data Propulsion efficiency in ice Regression analysis Conclusions and recommendations Literature cited
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 6
    Call number: ZSP-201-80/10
    In: CRREL Report, 80-10
    Description / Table of Contents: A mathematical model of coupled heat and moisture flow in soils has been developed. The model includes algorithms for phase change of soil moisture and frost heave and permits several types of boundary and initial conditions. The finite element method of weighted residual (Galerkin procedure) was chosen to simulate the spatial regime and the Crank-Nicholson method was used for the time domain portion of the model. To facilitate evaluation of the model, the heat and moisture fluxes were essentially decoupled; moisture flux was then simulated accurately, as were heat flux and frost heave in a laboratory test. Comparison of the simulated and experimental data illustrates the importance of unsaturated hydraulic conductivity. It is one parameter which is difficult to measure and for which only a few laboratory test results are available. Therefore, unsaturated hydraulic conductivities calculated in the computer model may be a significant source of error in calculations of frost heave. The algorithm incorporating effects of surcharge and overburden was inconclusively evaluated. Time-dependent frost penetration and frost heave in laboratory specimens were closely simulated with the model. After 10 days of simulation, the computed frost heave was about 2.3 cm vs 2.0 cm and 2.8 cm in two tests. Frost penetration was computed as 15 cm and was measured at 12.0 cm and 12.2 cm in the two laboratory samples after 10 days.
    Type of Medium: Series available for loan
    Pages: v, 49 Seiten , Illustrationen
    Series Statement: CRREL Report 80-10
    Language: English
    Note: CONTENTS Abstract Preface Introduction One-dimensional equations of simultaneous heat and moisture flux Moisture transport Heat transport Phase change Coupling effects Frost heave algorithm Development of computer model Finite difference vs finite element method Finite element formulation Time domain solution Evaluation of the mathematical model Heat flux Moisture flux Numerical dispersion Frost heave of homogeneous laboratory samples Conclusions Recommended studies to refine the model Literature cited Appendix A. Work plan, staffing and instrumentation requirements for correlating results oflaboratory frost susceptibility tests with field performance Appendix B. Proposed investigation of thaw weakening of subgrade soil and granular unboundbase course Appendix C. Derivation of finite element system matrices
    Location: AWI Archive
    Branch Library: AWI Library
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