Topological and thermodynamic investigations of ternary mixtures containing cyclic ether: Excess molar enthalpies

Excess molar enthalpies, H_ijk^E, of 1,3-dioxolane or 1,4-dioxane (i) + aniline (j) + benzene or toluene (k) ternary mixtures have been measured as a function of composition at 308.15 K. The H_ijk^E data have been fitted to Redlich-Kister equation to determine ternary adjustable parameters along with their standard deviations. It has been observed that H_ijk^E values predicted by Graph theory compare well with their corresponding experimental values. The observed data have been analyzed in terms of (i) Graph theory (which involves the topology of a molecule); (ii) Prigogine-Flory-Patterson; and (iii) Sanchez and Lacombe theories.     

Super-resolved parallel MRI by spatiotemporal encoding

Recent studies described an “ultrafast” scanning method based on spatiotemporal (SPEN) principles. SPEN demonstrates numerous potential advantages over EPI-based alternatives, at no additional expense in experimental complexity. An important aspect that SPEN still needs to achieve for providing a competitive ultrafast MRI acquisition alternative, entails exploiting parallel imaging algorithms without compromising its proven capabilities. The present work introduces a combination of multi-band frequency-swept pulses simultaneously encoding multiple, partial fields-of-view, together with a new algorithm merging a Super-Resolved SPEN image reconstruction and SENSE multiple-receiving methods. This approach enables one to reduce both the excitation and acquisition times of sub-second SPEN acquisitions by the customary acceleration factor R, without compromises in either the method’s spatial resolution, SAR deposition, or capability to operate in multi-slice mode. The performance of these new single-shot imaging sequences and their ancillary algorithms were explored and corroborated on phantoms and human volunteers at 3 T. The gains of the parallelized approach were particularly evident when dealing with heterogeneous systems subject to major T₂/T₂* effects, as is the case upon single-scan imaging near tissue/air interfaces.     

基于S7-200PLC的CEMS系统程序设计及优化研究

以某电厂4×600 MW机组脱硫烟气连续排放监测系统(CEMS)为背景,本文介绍了下位机S7-200 PLC及上位机Fame View组态软件在CEMS数据采集与处理子系统中的应用。重点阐述了CEMS下位程序的设计及上位机组态功能实现原理,针对现场实际情况进行分析,提出了程序优化方案。实践证明优化后的程序,可提高CEMS数据可靠性和有效性。本文所优化设计的CEMS系统程序已在某电厂长周期运行,系统各项功能正常,运行特性良好,达到了预期目的。     

On nonatomic submeasures on . II

It is shown that if two submeasures on View the MathML source" title="View the MathML source" align="absbottom" border="0" height=11 width="13"/> that are lim sup's of sequences of measures have the same zero sets, and one is nonatomic, so is the other, and they are (ε-δ)-equivalent. Moreover, if a submeasure η is the lim sup of a sequence of lower semi-continuous (lsc) submeasures and is 0-dominated by the so-called core γ^• of an lsc submeasure γ, then η is also (ε-δ)-dominated by γ^•. And if a submeasure η of this type is 0-dominated by a nonatomic submeasure, then it is nonatomic as well.     

Existence of a nontrivial solution for a class of superquadratic elliptic problems

A nontrivial solution is obtained for a class of superquadratic elliptic problems by variational methods.     

The equation on weakly pseudo-convex CR manifolds of dimension 3

Let M be a smooth, compact, orientable, weakly pseudoconvex manifold of dimension 3, embedded in View the MathML source" title="View the MathML source" align="absbottom" border="0" height=16 width="24"/> (N2), of codimension one or more, and endowed with the induced CR structure. Assuming that the tangential Cauchy-Riemann operator View the MathML source" title="View the MathML source" align="absbottom" border="0" height=20 width="15"/> has closed range in L²(M) in order to rule out the Rossi example, we push regularity up to show View the MathML source" title="View the MathML source" align="absbottom" border="0" height=20 width="15"/> has closed range in H^s(M) for all s>0. We then use the Szegö projection to show there is a smooth solution for the View the MathML source" title="View the MathML source" align="absbottom" border="0" height=20 width="15"/> problem given smooth data. The results are obtained via microlocalization by piecing together estimates for functions and (0,1) forms that hold on different microlocal regions.     

Fixed point theorems for better admissible multimaps on almost convex sets

We obtain new fixed point theorems on multimaps in the class Bp defined on almost convex subsets of topological vector spaces. Our main results are applied to deduce various fixed point theorems, coincidence theorems, almost fixed point theorems, intersection theorems, and minimax theorems. Consequently, our new results generalize well-known works of Kakutani, Fan, Browder, Himmelberg, Lassonde, and others.