Gamma 算子在 Lp (1≤p ≤∞)空间带权同时逼近的强逆不等式

该文利用修正的带权 K- 泛函K²σ f, t²)_w,p, 考虑Gamma算子在L_p~ (1≤p ≤∞)空间带权同时逼近, 给出了它的 B -型强逆不等式.     

Oscillation Theorems of the Second Order Linear Matrix Differential System with Damping

By using the Riccati technique and the technique, new oscillation criteria are obtained for the second order matrix differential system(P(t)Y′(t))′ r(t)P(t)Y′(t) Q(t)Y(t) = 0, t≥t0.These results in the present paper generalize and improve many known conclusions. Furthermore, some results are different from the most known ones in the sense that they are based on the information only on a sequence of subintervals of [t0, ∞), rather than on the whole half-line. In particular, our results complement a number of existing results and handle the ease that is not covered by the known criteria.     

Fabrication of uniform porous alumina materials by radio frequency (RF) magnetron sputtering

Fabrication of porous materials with uniform pore size distribution remains a challenge. In this paper, a kind of uniform porous alumina material was fabricated on a template of polystyrene microspheres by radio frequency (RF) magnetron sputtering. Surface of samples was observed by scanning electron microscopy (SEM), and the phase of porous materials was confirmed by X-ray diffraction (XRD). The pore size distribution of samples was tested by mercury intrusion method.     

Database of open-framework aluminophosphate syntheses: introduction and application (I)

The database of open-framework aluminophosphate (AlPO) syntheses has been established, which includes about 1600 synthetic records. Data analysis has been done on the basis of the framework composition, structure dimension, pore ring, and organic template. This database will serve as useful guidance for the rational synthesis of microporous functional materials.     

A novel pentaazadentate bismacrocycle cadmium complex

A novel pentaazadentate bismacrocycle was synthesized through an improved procedure of 1:1 Schiff base condensation of diformyltripyrrane with 3,4,3′,4′‐tetraamino‐biphenyl hydrochloride using Pb²⁺ as template ion, in which the condensed byproduct water was removed efficiently to make the yield over 90%. Then the bismacrocycle legend reacted with cadmium chloride to yield the title metal complex with molecular weight being 1200.4 by TOF MS and the λ_max being 766 nm.     

人造金刚石生长中的温度控制

 本文讨论了与腔体组装方法、温度梯度和边界条件等有关的温度控制问题及其对金刚石生长的影响。     

Kq, Scaling of ac susceptibility and the nonlinear response function of high-temperature superconductors

The amplitude-dependent ac susceptibility of high-temperature superconductors is shown to obey some empirical scaling relations. We try to analyze this behavior by extending a dc nonlinear response function of mixed state to the ac cases. The derived equations for critical current and ac susceptibility ξ(T) agree with the scaling relations of experimental data.     

All Admissible Linear Estimators under Quadratic Loss in Multivariate Model

§ 1.Introduction and Notations　In this paper,for any given matrices A and B,A B denotes the Kronecker productof A and B,A is a vector formed by stacking the columns of A under each other,μ(A)is a space generated by the columns of A,and PA=A(A′A) - A′. Fourthmore,if A andB are square matrices,then A>B and A≥ B mean that A-B is a symmetrical positiveand nonnegative matrix,respectively,andλi(A) is the i-th largest eigenvalue of A.　Consider general multivariate linear modelY …