一点更正

在文[1]中，由于笔者疏忽，在例3解答的结论中出现了一点失误，现更正如下：例1（2008年江苏卷第13题）若AB=2，AC=√2BC，则S△ABC的最大值是（ ）。     

Two-Photon Exchange Corrections to Single Spin Asymmetry of Neutron and 3He

In a simple hadronic model, the two-photon exchange contributions tothe single spin asymmetries for the nucleon and the ³He are estimated. The results show that the elastic contributions of two-photon exchange to the single spin asymmetries for the nucleon are rather small while those for the ³He are relativelylarge. Besides the strong angular dependence, the two-photon contributions to the single spin asymmetry for the ³He are very sensitive to the momentum transfer.     

更正

本刊2019年第11期第117页,内文左栏第5行,从第1个字起,应为“阎金铎先生”,特此更正.     

更正一道模拟题的参考答案

2000年6月某地编制了如下一道模拟题。     

更正说明

因编辑工作失误,本刊2013年第34卷第5期第828～837页发表的文章"Research,development,and application ofamorphous nickel alloy catalysts prepared by melt-quenching(急冷非晶态镍合金催化剂的研究开发和工业应用)"(作者:宗保宁,慕旭宏,张晓昕,孟祥堃,乔明华)中第829页图1有误,正确的图及图题如下.特此更正并致歉.     

Entropy Corrections to Three-Dimensional Black Holes and de Sitter Spaces

It has been shown that non-rotating black holes Recently study showed that thermal fluctuations would give in three or four dimensions possess a canonical entropy. rise to logarithmic corrections to Bekenstein Hawking entropy in area with a model-dependent uncertain coefficient. In this paper, the thermal fluctuations on Bekenstein-Hawking entropy in three-dimensional AdS black holes, Schwarzschild-de Sitter space and Kerr-de Sitter （KdS） spacetime with J = 0 will be considered based on a uniformly spaced area spectrum approach. Our conclusion shows that there is the same correction form in all cases we considered.     

Fermion Corrections to Mass of Scalar Glueball in QCD Sum Rule

Contributions of fermions to the mass of the scalar glueball 0^＋＋ are calculated at two-loop level in the framework of QCD sum rules. It slightly changes the coefficients in the operator product expansion （OPE） and shifts the mass of glueball to 1.72 ± 0.07 GeV.     

创建自己的化学Word模板

一直梦想着能利用计算机直接输入化学信息。经过努力,我利用Word提供的“自动更正”功能,创建出自己的化学Word模板,实现了这一梦想。做到了在Word文档中,仅用拼音字头便可轻松输入常见物质的化学式、结构式、电子式、核素符号、离子符号、基团符号、反应条件及连接符号、原子结构示意图、化学方程式、离子方程式、甚至实验仪器和实验装置图等。如果使用该模板并在“拼音加加”等输人法的中文状态下工作,还可以在不切换中、英文状态的下,达到中文和化学信息有选择的任意输人,提高了办公效率。下面简要介绍该模板的建立方法。     

对教材中摩尔气体常数测定实验原理误解的更正

摩尔气体常数的测定是高等院校无机化学课程中的一个重要实验。然而,现行实验教材对该实验的实验原理分析中却出现了两处误解,即没有正确理解实验中有关理想气体状态方程式和道尔顿分压定律的应用。本文对这两处误解进行了分析和解释。