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排序方式: 共有96条查询结果,搜索用时 11 毫秒
1.
Gerda C. Glaeser 《Thin solid films》2007,515(15):5964-5967
Fluorescent photon down conversion for the improvement of the blue response of ZnO/CdS/Cu(In,Ga)Se2 heterojunction solar cells and modules is investigated. Fluorescent dyes of the series Lumogen® F are analyzed by optical transmission and reflection as well as by photoluminescence measurements. A spectral transfer matrix formalism is introduced that allows to predict the suitability of a luminescent dye as a down-converter for a given solar cell from its absorption/emission properties. We find that Lumogen® F Violet 570 and Lumogen® F Yellow 083 as well as a combination of both yields improvements for Cu(In,Ga)Se2 solar modules. Particularly, we find that the short circuit current density of a Cu(In,Ga)Se2 mini-module is improved by 1.5 mA cm− 2 when applying a varnish with a combination of Lumogen® F Violet and Yellow. About 0.5 mA cm− 2 of this improvement is due to a reduced overall reflectance and an improvement of 1 mA cm− 2 results from the frequency conversion by the dyes. 相似文献
2.
Gerda Hohenberg 《e & i Elektrotechnik und Informationstechnik》2002,119(11):a5-a5
AktuellLaborausstattung für HTL Salzburg
Sigmatek f?rdert Hightech-Nachwuchs 相似文献3.
Sven Verdoolaege Martin Palkovič Maurice Bruynooghe Gerda Janssens Francky Catthoor 《Journal of Electronic Testing》2010,26(2):279-292
The application of loop and data transformations to array and loop intensive programs is crucial to obtain a good performance.
Designers often apply these transformations manually or semi-automatically. For the class of static affine programs, automatic
methods exist for proving the correctness of these transformations. Realistic multimedia systems, however, often contain constructs
that fall outside of this class. We present an extension of a widening based approach to handle the most relevant of these
constructs, viz. accesses to array slices, data dependent accesses and data dependent assignments, and report on some experiments
with non-trivial applications. 相似文献
4.
Gerda H. Schoutens Ruud P. Guit Gerard J. Zieleman Karel Ch. A. M. Luyben Nico W. F. Kossen 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1986,36(7):335-343
For the continuous production of isopropanol-butanol mixtures by immobilised Clostridium spp. (the IBE process) two reactor types were studied: a fluidised bed reactor with liquid recycling (FBR) and an external loop gas lift reactor (GLR). A large scale design (50–65 m3) was made for both reactors. A regime analysis, by evaluating the time constants for e.g. mixing and conversion, identified the ruling regime. Via the scale down approach two representative model reactors were developed: a 10 dm3 FBR reactor (H/D=25, D=0.08 m) and a 15 dm3 external loop GLR (H/D = 12.5, Dr=Dd=0.08 m). For both reactors the hydrodynamical behaviour and the total reactor performance were studied and are described in parts II and III of this study. 相似文献
5.
Ruud Klunder 《Journal of Housing and the Built Environment》1988,3(4):309-318
The author wishes to thank miss Barbara den Boer for her translation. 相似文献
6.
Friedrich Kiermeier und Gerda Schattenfroh 《Zeitschrift für Lebensmitteluntersuchung und -Forschung A》1959,110(4):241-249
Zusammenfassung Auf Grund der geringen Wasserlöslichkeit, dem indifferenten Verhalten gegenüber biochemischen Reaktionen und gegenüber Mikroorganismen bestehen keine Bedenken in der Anwendung von Kunststoffleitungen aus Polyäthylen. Da je nach den örtlichen Gegebenheiten sich besondere Schwierigkeiten in der Reinigung der Leitungen ergeben können, wird eine ständige Kontrolle für notwendig erachtet.I. Mitt.:G. Wildbrett, u.F. Kiermeier: DieSe Z.108, 32 (1958). — II. Mitt.:G. Wildbrett, G. Schattenfroh u.F. Kiermeier: Milchwiss.13, 491 (1958). — III. Mitt.:F. Kiermeier u.G. Schattenfroh: Akten XV. Internat. Milchwirtschaftskongreß London 1959 (im Druck). -IV. Mitt.:F. Kiermeier, G. Wildbrett u.G. Schattenfroh: Diese Z.109, 43 (1959). 相似文献
7.
Sihao Deng Gerda Fischer Marc Uhlarz Joachim Wosnitza Klaus‐Peter Bohnen Rolf Heid Cong Wang Christoph Sürgers 《Advanced functional materials》2019,29(37)
Magnetic materials with a non‐collinear and non‐coplanar arrangement of magnetic moments hosting a nonzero scalar spin‐chirality exhibit unique magnetic and spin‐dependent electronic transport properties. The spin chirality often occurs in materials where competing exchange interactions lead to geometrical frustrations between magnetic moments and to a strong coupling between the crystal lattice and the magnetic structure. These characteristics are particularly strong in Mn‐based antiperovskites where the interactions and chirality can be tuned by substitutional modifications of the crystalline lattice. This study presents evidence for the formation of two unequal chiral spin states in magnetically ordered Mn3.338Ni0.651N antiperovskite based on density functional theory calculations and supported by magnetization measurements after cooling in a magnetic field. The existence of two scalar spin‐chiralities of opposite sign and different magnitude is demonstrated by a vertical shift of the magnetic‐field dependent magnetization and Hall effect at low fields and from an asymmetrical magnetoresistivity when the applied magnetic field is oriented parallel or antiparallel to the direction of the cooling field. This opens up the possibility of manipulating the spin chirality for potential use in the emerging field of chiral spintronics. 相似文献
8.
Gerda Urbach 《Journal of the American Oil Chemists' Society》1965,42(11):927-930
Homologous aliphatic γ- or δ-lactones are separated by thin-layer chromatography on a mixture of kieselguhr G and silica gel
G (1:8). The thin-layer plates are chromatographically impregnated with methanol as the stationary phase and developed 3 times
with light petroleum (bp 80–100C) saturated with methanol. γ- And δ-lactones can be separated from each other on the same
adsorbent with a 1:1 mixture of light petroleum (bp 30–40C) and isopropyl ether. The systems can be combined 2-dimensionally.
The lactones are detected by spraying the chromatoplates either with a 2% solution of iodine in methanol or with alkaline
hydroxylamine followed by ferric chloride and acetic acid. These methods were used for the tentative identification of δ-C10–16 lactones in commercial Australian butteroil. 相似文献
9.
Alicja Bakalarz Gerda Gloy Andrzej Luszczkiewicz 《Mineral Processing and Extractive Metallurgy Review》2013,34(2):103-111
Influence of n-dodecane aqueous emulsion on flotation of sulfide minerals present in the copper ore from the Legnica-Glogow Copper Basin (LGOM), carried out on the laboratory scale, was investigated. Five flotation experiments performed in the presence of different doses of n-dodecane were conducted and compared. Next, mineral analysis of selected flotation products were conducted and discussed. The best flotation selectivity was obtained for bornite, tennantite and chalcocite using 600 g/t of n-dodecane. In the case of non-copper sulfides, the maximum selectivity was observed for sphalerite and galena. Measurements of the rest potential of copper sulfide conducted to explain the differences between recoveries of each sulfide mineral were performed. It was observed, that with increasing sulfide rest potential, the recovery was decreasing. The study provided information hitherto poorly available in literature on flotation of sulfides from the LGOM area with n-dodecane. 相似文献
10.
Rocío Santander Werner Creixell Elizabeth Sánchez Gerda Tomic José R. Silva Cristian A. Acevedo 《Food and Bioprocess Technology》2013,6(12):3345-3352
Beef from cattle less than 30 months old at the point of slaughter are generally sold in meat markets. Though the age of the animal can generally be estimated by dentition, this method cannot be applied to a carcass or a piece of meat from which the teeth have been removed. Since gas chromatography of volatile organic compounds has been used to classify biological samples, this technique was used for classifying meat obtained from cattle aged over 30 months (OTM) at point of slaughter. Volatile organic compounds of fresh meat (M. longissimus dorsi) samples obtained from cattle of different age and dentition (two, four, and six teeth) at point of slaughter were analyzed using gas chromatography/mass spectrum (GC/MS). Six volatile organic compounds were selected (hexanoic acid, benzoic acid, octanoid acid, tridecane, tetradecane, and 4-formylbenzoic acid) and confirmed by using chemical standards and Kovat’s indexes. The chromatogram data were used to train two classifiers, one based on the partial least square (PLS) method and another based on support vector machine (SVM), but only SVM showed high accuracy. Data exploration based on the principal component analysis allowed for comprehension of the data distribution, proposing a new version of PLS in a parallel configuration. This modified version of the PLS algorithm showed better accuracy than the SVM classifier. In conclusion, volatile organic compounds analyzed by GC/MS–solid-phase microextraction can be used to recognize OTM beef. 相似文献