ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
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
  • Articles  (317)
Collection
Source
Keywords
Publisher
Years
Journal
Topic
  • 1
    Electronic Resource
    Electronic Resource
    An Unusual Enantioselective Aldol-Type Reaction of an Acetate Boryl Enolate Derived from a Chiral Thioimide (1994)
    s.l. : American Chemical Society
    The @journal of organic chemistry 59 (1994), S. 8187-8191 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00105a040
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Asymmetric Aldol Type Reactions of Acetate Imide Enolates (1995)
    s.l. : American Chemical Society
    The @journal of organic chemistry 60 (1995), S. 3301-3306 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00116a011
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Reliability Analysis of Structure System Considering Failure Modes of Strength, Fatigue and Buckling (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 385-387 (July 2008), p. 257-260 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: There could be multi-failure modes in the course of working of the structure systemincluding slender bar members. For example, strength failure, fatigue failure and buckling failure,especially sudden buckling failure would bring large disaster to structure. In this paper, according toFatigue and Damage Mechanics theory, safe margin expression of the different failure mode ofstructure (static strength, fatigue and buckling) is given firstly, then by analyzing different failuremode of structural element under static and fatigue loads, and failure mode of the calculatingelement is confirmed by comparing the failure probability value of different failure mode. In thecourse of searching for significant failure paths, not only is failure mode that stiffness matrix ofstructure is zero considered, but also buckling failure mode of compressed residual structure isconsidered too, so that failure analysis is more reasonable. In the end, the reliability calculatingmethod of the structural system is given, and the validity of the method proposed in this paper isexplained combining an example
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.385-387.257.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The Influence of Stiffness Decay on Fatigue Reliability of Truss System (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 385-387 (July 2008), p. 325-328 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Physical properties of element are very complex under fatigue loads.The structuralsystem consisted of elements is not a simple topological structure,which the change of its physicalproperties is more complex.In order to analyze quantitatively the structural stiffness reliability ofdifferent design life,it is important to establish the accurate formula of physical properties decrease.In this paper, the formula of elements’ elastic modulus decrease is deduced by using damagemechanics theory combining with the model of residual strength of element. Moreover, stiffnessreliability index of controlling node of truss system is solved by applying the Stochastic FiniteElement Method in different service life
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.385-387.325.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Integrity Stable Reliability Analysis of Stochastic Structure System under Multiple Stochastic Loads (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 44-46 (June 2008), p. 329-336 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Generally, a safe margin equation is established by critical load coefficient and externalload coefficient of the system in structural integrity stable reliability analysis, and then the reliabilityindex of structural integrity stability is educed. Critical load coefficient is always obtained oncondition that structure is acted on by one load. Actually, besides one load acting on the structure,their distribution is not always the same. In addition, because of the stochastic characteristic ofstructure system itself (e.g., cross-section of element, length, modulus of elasticity etc. are randomvariables), it is difficult for structural integrity stable reliability analysis. According to the theory ofstructure system stability and basal concept of reliability, the safe margins of structure system underdifferent distribution loads are presented in this paper. The expression of safe margin sensitivity isgiven by stochastic finite element method because the safe margin is the expression of implicitfunction. Furthermore, the reliability indexes of the safe margin under different condition are educedby the advanced first order second moment method (AFOSM). By comparison and analysis, thestructural integrity stable reliability index is ultimately obtained
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.44-46.329.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    A Method of Fuzzy Probability under Small Sample (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 44-46 (June 2008), p. 879-884 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Based on BAYES data processing theory, a new method of fuzzy probability is proposedfor the parameter reliability of small sample. Prior distribution of fuzzy parameter is obtained bystochastic weighted method, then posterior distribution of fuzzy parameter is got by the method ofconjugate distribution. In the end, the formula of fuzzy membership function is constructed, andprobability of fuzzy events is solved.The study of this paper aims at the membership function which isdeduced in the condition that mean is known and deviation is unknown in normal populationdistribution. At the same time using information of small sample of actual experiment, the study fullyutilizes prior information, so, it is convincing to evaluate reliability of fuzzy parameter. It is obviouslyeconomical
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.44-46.879.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Reliability Analysis of Damaged Piezoelectric Structure (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 44-46 (June 2008), p. 569-574 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: According to the piezoelectric material damage theory and the fracture criterion based ondamage theory, which has been established by Yang et al, reliability analysis of a damagedpiezoelectric truss is carried out. The expression of safety margins of the piezoelectric beam has beenproposed, with the mechanical damage extension force, electric damage extension force, InertiaMoment of cross-section and nodal loads as stochastic variables. Then the truss is dealt withrandomly, and the corresponding reliability index is got according to the Taylor stochastic finiteelement. The result indicates that the reliability of the system is influenced greatly when the positiveand negative electric fields have been applied on the structure, which provides the basis to control thereliability of structural system. Finally, through a calculation example, the quantification results of thereliability index are compared under the conditions of positive electric field, negative electric field orno electric field
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.44-46.569.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    The Study of Collateral Damages in the Process of Femtosecond Laser Micromachining Single-Crystalline Silicon (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 560-563 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Femtosecond laser pulses are irradiated on a single-side polished single-crystalline siliconwafer. Metamorphic zone appears around the ablated zone and the morphology changes gradually inthe metamorphic zone. Typical phenomena of thermal ablation such as melt-resolidification andsubtransparent glassy materials occur in the marginal area of the ablated zone. No apparent changesare found among microscopic morphologies of the ablated, metamorphic and unirradiated zones.There are flaws and spallations on the smooth back surface of the wafer, which are caused by thestress inside the sample. Nanomechanical properties of the sample surface hardly change in the smallscope of the backside around the ablated zone. While regular changes occur in large scope, which isthe conjunct result of such stresses caused by many different collateral damages
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.560.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Nanomechanical Properties of Single-Crystalline Silicon Wafer Irradiated by High-Energy Femtosecond Laser Pulses (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 315-316 (July 2006), p. 159-163 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: High-energy femtosecond laser pulses were utilized to ablate single-crystalline siliconwafer. Collateral damage areas around the ablation zone can be observed in microscope. Themorphology in such areas changes gradually. The microscopic morphology and nanomechanicalproperties of the pre-polished back surface were measured by AFM and Hysitron TriboIndenterrespectively. The topography and roughness in the ablated, metamorphic and unaffected zone arealmost equal. Yet the elastic ratio and hardness on the back surface vary gradually with indentpositions, which coincide with the gradual morphological changes in the metamorphic zone on thefront surface. Such regular changes in nanomechanical properties, to some extent, reflect thedistribution of collateral damages near the ablated zone on the back surface. And they also testifythe occurrence of the ill effects that go against micromachining during high-energy femtosecondlaser irradiation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.315-316.159.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Microscopic Study of Structural Failure Mechanism and Reliability Considering Dead and Fatigue Load (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 683-686 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The microscopic processes of internal force redistribution of structural system due todead load failure or fatigue failure of structural element and failure mechanism of cumulativedamage under outside loads is discussed in this paper. Considering the influence of cumulativedamage to the residual strength and the reasonable time of dead load failure selected, the next stepcalculation of cumulative damage has a clear quantitative time. Reasonable expression is providedfor the establishment of the equation of safety margin. By an example, the reliability index, which isgained by rough conservative considering the time of dead load failure selected, is compared withthe reliability index, which is gained by using the method of this paper. The method of this papercoincides with the engineering fact by analysis. A reasonable method is provided for reliabilityanalysis which structural system is considered dead load and fatigue failure at the same time
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.683.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...