EFFECTS OF THE ELECTRONIC BAND SHAPE OF PALLADIUM METAL ON THE PROTON MODEL FOR HYDROGEN ABSORPTION

1965 ◽  
Vol 43 (6) ◽  
pp. 1665-1671 ◽  
Author(s):  
J. W. Simons ◽  
Ted B. Flanagan
Keyword(s):  
Hydrogen Absorption ◽  
Statistical Treatment ◽  
Original Model ◽  
Band Shape ◽  
Electronic Band ◽  
Critical Isotherm ◽  
Critical Composition ◽  
Improved Model ◽  
Electron Donation ◽  
Palladium Metal

The statistical treatment of the proton model for hydrogen absorption by palladium is extended to include a variation of the electron donation energy with hydrogen content, as determined by a density of states function for the combined 4d- and 5s-bands for palladium. This improved model gives better agreement with the high pressure limiting solubility data and the observed critical composition than the original model, when both are fitted to the critical isotherm by the same method. An apparent anomaly in the variation of the isosteric enthalpy of absorption with content is explained by the improved model.

Electronic band‐shape calculations in ammonia

1981 ◽  
Vol 74 (10) ◽  
pp. 5516-5520 ◽  
Author(s):  
Phaedon Avouris ◽  
A. R. Rossi ◽  
A. C. Albrecht
Keyword(s):  
Band Shape ◽  
Electronic Band

Feasibility of electron donation to the CuO2 plane of mono-layer copper oxides by hydrogen absorption

1991 ◽  
Vol 185-189 ◽  
pp. 845-846
Author(s):  
Toshikazu Ekino ◽  
Kuniko Matsukuma ◽  
Toshiro Takabatake ◽  
Yoshiteru Maeno ◽  
Hironobu Fujii
Keyword(s):  
Hydrogen Absorption ◽  
Cuo2 Plane ◽  
Copper Oxides ◽  
Mono Layer ◽  
Electron Donation

Application of the electron-donation model for hydrogen absorption to palladium-rich alloys. Hydrogen-gold-palladium

1968 ◽  
Vol 72 (1) ◽  
pp. 136-143 ◽  
Author(s):  
Kenneth D. Allard ◽  
Arnulf J. Maeland ◽  
John W. Simons ◽  
Ted B. Flanagan
Keyword(s):  
Hydrogen Absorption ◽  
Electron Donation

scholarly journals Ion-Irradiation Effects of Hydrogen Absorption in Palladium Metal

2008 ◽  
Vol 33 (4) ◽  
pp. 1053-1056 ◽  
Author(s):  
Yasuhiro Yoneda ◽  
Kazuhisa Tamura ◽  
Hiroshi Abe ◽  
Takeshi Ohshima ◽  
Ryo Morimoto ◽  
...  
Keyword(s):  
Hydrogen Absorption ◽  
Ion Irradiation ◽  
Irradiation Effects ◽  
Palladium Metal

Occupant Evacuation Based on Cellular Automata Involving Repulsion

2014 ◽  
Vol 556-562 ◽  
pp. 4061-4064
Author(s):  
Xue Ling Jiang ◽  
Chao Yun Long ◽  
Shui Jie Qin ◽  
Li Ping Wang ◽  
Jiang Hui Dong
Keyword(s):  
Cellular Automata ◽  
High Efficiency ◽  
Dynamic Parameter ◽  
Original Model ◽  
Model Based ◽  
Pedestrian Evacuation ◽  
Improved Model ◽  
Account Interaction ◽  
Occupant Evacuation ◽  
Original Dynamic

The dynamic parameter model based on cellular automata was not taken into account interaction between pedestrian and environment,it resulted in quite different from that of in real life.So a new model was proposed by taking into account one of the interactions:repulsion.In the present work, evacuation involving repulsion problem was studied in the room with single exit.The expanded model based on dynamic parameter model is introduced by using the quantitative of repulsion.The model could be used to explore the different degree of panic through repulsion.The corresponding simulations of pedestrian evacuation with repulsion were carried out. It extends the constraint where the original model was applied. The improved model is more accordance with actual circumstance than the original dynamic parameters model.The improved model is not only expected to model evacuations in detail but also has high efficiency.

scholarly journals Wave Equations of Porous Media Saturated With Two Immiscible Fluids Based on the Volume Averaging Method

2021 ◽  
Vol 9 ◽  
Author(s):  
Fansheng Xiong ◽  
Jiawei Liu ◽  
Zhenwei Guo ◽  
Jianxin Liu
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Wave Propagation ◽  
Wave Equations ◽  
Coefficient Matrix ◽  
Immiscible Fluids ◽  
Original Model ◽  
Governing Equations ◽  
Improved Model ◽  
Dispersion And Attenuation

Simulating and predicting wave propagation in porous media saturated with two fluids is an important issue in geophysical exploration studies. In this work, wave propagation in porous media with specified structures saturated with two immiscible fluids was studied, and the main objective was to establish a wave equation system with a relatively simple structure. The wave equations derived by Tuncay and Corapcioglu were analyzed first. It was found that the coefficient matrix of the equations tends to be singular due to the inclusion of a small parameter that characterizes the effect of capillary stiffening. Therefore, the previously established model consisting of three governing equations may be unstable under natural conditions. An improved model based on Tuncay and Corapcioglu’s work was proposed to ensure the nonsingularity of the coefficient matrix. By introducing an assumption in which one fluid was completely wrapped by the other, the governing equation of the wrapped fluid was degenerated. In this way, the coefficient matrix of wave equations became nonsingular. The dispersion and attenuation prediction resulting from the new model was compared with that of the original model. Numerical examples show that although the improved model consists of only two governing equations, it can obtain a result similar to that of the original model for the case of a porous medium containing gas and water, which simplifies the complexity of the calculations. However, in a porous medium with oil and water, the predictions of dispersion and attenuation produced by the original model obviously deviate from the normal trend. In contrast, the results of the improved model exhibit the correct trend with a smooth curve. This phenomenon shows the stability of the improved model and it could be used to describe wave propagation dispersions and attenuations of porous media containing two immiscible fluids in practical cases.

Electronic Band Structure, Fermi Surface, and Magnetic Properties of Palladium Metal

1966 ◽  
Vol 37 (3) ◽  
pp. 1256-1256 ◽  
Author(s):  
A. J. Freeman ◽  
A. M. Furdyna ◽  
J. O. Dimmock
Keyword(s):  
Magnetic Properties ◽  
Band Structure ◽  
Fermi Surface ◽  
Electronic Band Structure ◽  
Electronic Band ◽  
Palladium Metal

Simulation of a Characteristics Identification Algorithm

2014 ◽  
Vol 945-949 ◽  
pp. 2306-2309 ◽  
Author(s):  
Wen Chuan Yang ◽  
Rui Li ◽  
Zhi Dong Shang
Keyword(s):  
Mobile Phone ◽  
Memory Systems ◽  
Identity Authentication ◽  
Original Model ◽  
Pass Rate ◽  
Biometric Identification ◽  
Identification Algorithm ◽  
Dynamic Identity ◽  
Mobile Phone System ◽  
Improved Model

Keystroke rhythm identification, which extracts biometric characteristics through keyboards without additional expensive devices, is a kind of biometric identification technology. The paper proposes a dynamic identity authentication model based on the improved keystroke rhythm algorithm in Rick Joyce model and implement this model in a mobile phone system. The experimental results show that comparing with the original model, the false alarm rate of the improved model decreases a lot in the mobile phone system, and its growth of imposter pass rate is slower than the Rick Joyce models. The improved model is more suitable for small memory systems, and it has better performance in security and dynamic adaptation. This improved model has good application value.

scholarly journals Improving an Urban Cellular Automata Model Based on Auto-Calibrated and Trend-Adjusted Neighborhood

Land ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 688
Author(s):  
Xinhao Pan ◽  
Zichen Wang ◽  
Miao Huang ◽  
Zhifeng Liu
Keyword(s):  
Land Use ◽  
Neighborhood Effects ◽  
Urban Form ◽  
Urban Expansion ◽  
Original Model ◽  
Sustainable Urban Development ◽  
Cellular Automata Model ◽  
Land Use Scenario ◽  
Improved Model ◽  
Expansion Model

Accurately simulating urban expansion is of great significance for promoting sustainable urban development. The calculation of neighborhood effects is an important factor that affects the accuracy of urban expansion models. The purpose of this study is to improve the calculation of neighborhood effects in an urban expansion model, i.e., the land-use scenario dynamics-urban (LUSD-urban) model, by integrating the trend-adjusted neighborhood algorithm and the automatic rule detection procedure. Taking eight sample cities in China as examples, we evaluated the accuracies of the original model and the improved model. We found that the improved model can increase the accuracy of simulated urban expansion in terms of both the degree of spatial matching and the similarity of urban form. The increase of accuracy can be attributed to such integration comprehensively considers the effects of historical urban expansion trends and the influences of neighborhoods at different scales. Therefore, the improved model in this study can be widely used to simulate the process of urban expansion in different regions.

scholarly journals Further confirmation for unknown archaic ancestry in Andaman and South Asia

2016 ◽  
Author(s):  
Mayukh Mondal ◽  
Ferran Casals ◽  
Partha P. Majumder ◽  
Jaume Bertranpetit
Keyword(s):  
Statistical Treatment ◽  
Data Sets ◽  
Diverse Populations ◽  
African Origin ◽  
Single Wave ◽  
Single Origin ◽  
Sources Of Error ◽  
Out Of Africa ◽  
Improved Model ◽  
Genomic Regions

In a recent paper1, we have derived three main conclusions: i) that all Asian and Pacific populations share a single origin and expansion out of Africa, contradicting an earlier proposal of two independent waves; ii) that populations from South and Southeast Asia harbor a small proportion of ancestry from an unknown extinct hominin – different from the Neanderthal and the Denisovan – which is absent in Europeans; and, iii) that the characteristic distinctive phenotypes (including very short stature) of Andamanese do not reflect an ancient African origin, but have resulted from strong natural selection on genes related to human body size. Although the single wave out of Africa2 and single origin for Asian and Pacific populations have been confirmed3, the existence of admixture with an extinct hominin has been challenged by Skoglund et al.4, as they were unable to replicate our results in their data sets. While we had used a wide variety of statistical methods and data sets from diverse populations to draw our inference, Skoglund et al.4 have used only one method (D-stats5, for the whole genome, not specifically for the relevant genomic regions) and compared only with the Asians, not even with the Europeans. Skoglund et al.4 have alleged that our statistical treatment of the data was faulty and have pointed out some possible sources of error. We have reexamined our data focusing on possible sources of error flagged by Skoglund et al4. We have also performed new analyses. The reexamination and new analyses have bolstered our confidence that our earlier inferences were correct and have resulted in an improved model of introgression of modern humans with a hitherto unknown archaic ancestry. We also propose a possible reason for the inability of Skoglund et al.4 to validate our inference.

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