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- C Y Chen
- 2000

On contrary to the customary thought, the well-known " lemma " that the distribution function of a collisionless Boltzmann gas keeps invariant along a molecule's path represents not the strength but the weakness of the standard theory. One of its consequences states that the velocity distribution at any point is a condensed " image " of all, complex and… (More)

- C Y Chen
- 1999

After revealing difficulties of the standard time-dependent perturbation theory in quantum mechanics mainly from the viewpoint of practical calculation, we propose a new quasi-canonical perturbation theory. In the new theory, the dynamics of physical observables, instead of that of coefficients of wave-function expansion, is formulated so that the… (More)

- C Y Chen
- 2003

It is shown that the Boltzmann kinetic theory for gas systems involves mathematical and physical misconcepts and the picture of time irreversibility given by it is actually misleading. It is well-known that while the Newtonian formalism is time reversible the kinetic equations, based almost entirely on the Newtonian formalism, are time irreversible. At a… (More)

- C Y Chen
- 2000

With help of direct calculation, it is revealed that an essential concept in deriving the Boltzmann collisional operator, the scattering cross section in the laboratory frame, cannot be well defined. Along this line, it is suggested that the collisional operator, as well as the entire Boltzmann equation, should be reconsidered.

- C Y Chen
- 1999

This paper is concerned with whether or not the preferential gauge can ensure the uniqueness and correctness of results obtained from the standard time-dependent perturbation theory, in which the transition probability is formulated in terms of matrix elements of Hamiltonian. For a dynamical quantum process, the major objective of the existing perturbation… (More)

- C. Y. Chen
- 2003

Paradoxes in the Boltzmann kinetic theory are presented. Firstly, it is pointed out that the usual notion concerning the perfect continuity of distribution function is not generally valid; in many important situations using certain types of discontinuous distribution functions is an absolute must. Secondly, it is revealed that there is no time reversibility… (More)

The first metal phosphatooxalate containing a chiral amine, (R-C5H14N2)2[Ga4(C2O4)(H2PO4)2(PO4)4].2H2O, has been synthesized hydrothermally and characterized by single-crystal X-ray diffraction and 31P MAS NMR spectroscopy. It crystallizes in the monoclinic space group P2(1) (No. 4) with a = 8.0248(4) A, b = 25.955(1) A, c = 9.0127(5) A, beta = 100.151(1)… (More)

- C. Y. Chen
- 2000

The textbook treatment in that the wave function of a dynamical system is expanded in an eigenfunction series is investigated. With help of an elementary example and some mathematical theorems, it is revealed that in terms of solving the time-dependent Schrödinger equation the treatment involves in divergence trouble. The root reason behind the trouble is… (More)

- Eugene Demidenko, S P Glaholt, E Kyker-Snowman, J R Shaw, C Y Chen
- Toxicology and applied pharmacology
- 2017

The goal of this paper is to offer a rigorous analysis of the sigmoid shape single toxin dose-response relationship. The toxin efficacy function is introduced and four special points, including maximum toxin efficacy and inflection points, on the dose-response curve are defined. The special points define three phases of the toxin effect on mortality: (1)… (More)

- Pei Ling Chiu, Chih Yuan Chen, Chun-Chin Lee, Meng-Hua Hsieh, Chuan-Hung Chuang, Hon Man Lee
- Inorganic chemistry
- 2006

The synthesis and structural characterization of several new silver complexes of L (L = a bidendate ligand of pyrazole and N-heterocyclic carbene) are described. The result shows that the choice of counterions, N-substitutions of L, and reaction conditions are crucial which lead to a variety of structural motifs, including novel metallomacrocycles… (More)