Construction of Eh–pH and Other Stability Diagrams of Uranium in a Multicomponent System with a Microcomputer—I. Domains of Predominance Diagrams

1989 ◽  
Vol 28 (3) ◽  
pp. 225-234 ◽  
Author(s):  
Hsin-Hsiung Haung ◽  
L. Cuentas
2007 ◽  
Vol 13 (1s) ◽  
pp. 26-28
Author(s):  
Yu.B. Ratner ◽  
◽  
M.V. Ivanchik ◽  
Т.М. Bayankina ◽  
E.V. Plotnikov ◽  
...  

Author(s):  
Sandip Tiwari

Unique nanoscale phenomena arise in quantum and mesoscale properties and there are additional intriguing twists from effects that are classical in origin. In this chapter, these are brought forth through an exploration of quantum computation with the important notions of superposition, entanglement, non-locality, cryptography and secure communication. The quantum mesoscale and implications of nonlocality of potential are discussed through Aharonov-Bohm effect, the quantum Hall effect in its various forms including spin, and these are unified through a topological discussion. Single electron effect as a classical phenomenon with Coulomb blockade including in multiple dot systems where charge stability diagrams may be drawn as phase diagram is discussed, and is also extended to explore the even-odd and Kondo consequences for quantum-dot transport. This brings up the self-energy discussion important to nanoscale device understanding.


2021 ◽  
Vol 265 ◽  
pp. 124478
Author(s):  
J.A. Vargas-Rueda ◽  
Alejandro R. Alonso ◽  
M. Meléndez-Zamudio ◽  
M. Meléndez-Lira

1985 ◽  
Vol 55 (6) ◽  
pp. 463-473 ◽  
Author(s):  
J. Hansen

1996 ◽  
Vol 465 ◽  
Author(s):  
Robert J. Finch

ABSTRACTGibbs free energies of formation (ΔG°ƒ) for several structurally related U(VI) minerals are estimated by summing the Gibbs energy contributions from component oxides. The estimated ΔG°f values are used to construct activity-activity (stability) diagrams, and the predicted stability fields are compared with observed mineral occurrences and reaction pathways. With some exceptions, natural occurrences agree well with the mineral stability fields estimated for the systems Sio2-Cao-Uo3-UOH2O and Co2-caO-UO3-H2O providing confidence in the estimated thermodynamic values. Activity-activity diagrams are sensitive to small differences in ΔG°f values, and mineral compositions must be known accurately, including structurally bound H2O. The estimated ΔG°f values are not considered reliable for a few minerals for two major reasons: (1) the structures of the minerals in question are not closely similar to those used to estimate the ΔG°f* values of the component oxides, and/or (2) the minerals in question are exceptionally fine grained, leading to large surface energies that increase the effective mineral solubilities.


2015 ◽  
Vol 138 (1) ◽  
Author(s):  
Ye Ding ◽  
Jinbo Niu ◽  
LiMin Zhu ◽  
Han Ding

A semi-analytical method is presented in this paper for stability analysis of milling with a variable spindle speed (VSS), periodically modulated around a nominal spindle speed. Taking the regenerative effect into account, the dynamics of the VSS milling is governed by a delay-differential equation (DDE) with time-periodic coefficients and a time-varying delay. By reformulating the original DDE in an integral-equation form, one time period is divided into a series of subintervals. With the aid of numerical integrations, the transition matrix over one time period is then obtained to determine the milling stability by using Floquet theory. On this basis, the stability lobes consisting of critical machining parameters can be calculated. Unlike the constant spindle speed (CSS) milling, the time delay for the VSS is determined by an integral transcendental equation which is accurately calculated with an ordinary differential equation (ODE) based method instead of the formerly adopted approximation expressions. The proposed numerical integration method is verified with high computational efficiency and accuracy by comparing with other methods via a two-degree-of-freedom milling example. With the proposed method, this paper details the influence of modulation parameters on stability diagrams for the VSS milling.


2013 ◽  
Vol 43 (12) ◽  
pp. 1235-1241 ◽  
Author(s):  
L. D. Brown ◽  
R. Abdulaziz ◽  
S. Simons ◽  
D. Inman ◽  
D. J. L. Brett ◽  
...  

1984 ◽  
Vol 33 (11) ◽  
pp. E481-E485
Author(s):  
J.Rajagopala Rao ◽  
K.M. Parida ◽  
R.S. Thakur ◽  
S.B. Rao

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