高中化学教材中硫酸亚铁溶解度引用数据的纠正

硫酸亚铁在水中的溶解度在高中化学教材《实验化学》人教版和苏教版的引用数据悬殊很大。通过实验测定七水硫酸亚铁在水中的溶解度以便证明教材中引用的溶解度数据是否正确。结果表明,2套教材中硫酸亚铁的表达形式和溶解度数据之间都不吻合,需要对教材中硫酸亚铁溶解度引用数据进行纠正。     

含氟电解液使用次数(n≤15)对TiO2纳米管阵列形貌及锂电性能的影响

为了降低含氟电解液对环境的不良影响和有用资源的浪费,本文以不同使用次数(n≤15)的含氟溶液作为电解液,采用阳极氧化法制备了一系列TiO2纳米管阵列(TiO2NT).然后借助SEM、恒流充/放电、循环稳定性及循环伏安(CV)技术研究了含氟电解液的使用次数(n≤15)对所制备纳米管阵列电极的形貌及脱/嵌锂离子性能的影响.结果表明:含氟电解液的使用次数(n≤15)对TiO2NT形貌的负面影响不明显;作为锂离子电池负极活性材料时,电化学脱/嵌锂性能也没有出现大幅降低.     

贯彻《基本要求》 体现应用特色 建设物理教材

根据应用型人才培养要求和地方高校学生实际,采用习题难度量化方法描述工科大学物理课程知识点的分层次教学要求,提出贯彻《基本要求》的实施细则,在进行应用型工科物理教材建设中作为选择教材内容的依据,教材中物理基本概念和基本规律的阐述和引入注重与中学物理衔接,例题、问题、习题和自测题的选编体现启发性、应用性和趣味性并分层次精心设计,以达到引导学生自主学习、提高学习能力和培养创新精神的目的.     

Measurements of the light output functions of plastic scintillator using 9Be（d,n）10B reaction neutron source

The light output functions for protons of ST-401 and BC-408 plastic scintillators were measured using white neutron source produced by the 9Be（d,n） 10B reaction at the HI-13 Tandem Accelerator at China Institute of Atomic Energy（CIAE）.The LOFs of plastic scintillators for protons in the energy range of 0.5-16.5 MeV were obtained by the time-of-flight（TOF） technique and an iterative procedure.Two parameters（kB and C） were deduced by fitting the experimental data.     

Metallic Contaminant Detection using a High-Temperature Superconducting Quantum Interference Devices Gradiometer

We develop magnetic metallic contaminant detectors using high-temperature superconducting quantum interference devices （HTS-SQUIDs） for industrial products. Finding ultra-small metallic contaminants is an important issue for manufacturers producing commercial products such as lithium ion batteries. If such contaminants cause damages, the manufacturer of the product suffers a big financial loss due to having to recall the faulty products. Previously, we described a system for finding such ultra-smafi particles in food. In this study, we describe further developments of the system, for the reduction of the effect of the remnant field of the products, and we test the parallel magnetization of the products to generate the remnant field only at both ends of the products. In addition, we use an SQUID gradiometer in place of the magnetometer to reduce the edge effect by measuring the magnetic field gradient. We test the performances of the system and find that tiny iron particles as small as 50 × 50 μm^2 on the electrode of a lithium ion battery could be clearly detected. This detection level is difficult to achieve when using other methods.     

美国A P物理教材特色及启示

我国 A P物理课程建设近年来取得了一定的进展, 但仍存在教材匮乏的问题. 采用内容分析的方法分 析了美国主流 A P物理教材《 P h y s i c s : P r i n c i p l e sw i t hA p p l i c a t i o n s 》 , 给我国的 A P物理教材建设提供了借鉴     

Selective Atom-Cavity Interaction Scheme for Quantum Controlled-NOT Gate Using Four-Level Atoms in Cavity QED System

We propose a scheme for realization a quantum Controlled-NOT gate operation using two four-level atoms through a selective atom cavity interaction in cavity quantum electrodynamics system. In our protocol, the quantum information is encoded on the stable ground states of the two atoms. During the interaction between atoms and single-mode vacuum cavity-field, the atomic spontaneous emission is negligible as the large atom-cavity detuning effectively suppresses the spontaneous decay of the atoms. The influences of the dissipation and the deviation of interaction time on fidelity and corresponding success probability of the quantum Controlled-NOT gate and the experimental feasibility of our proposal are also discussed.     

推导光栅衍射暗纹位置公式的简易方法

光栅衍射是普通物理等物理类教材中重要的必修内容．常用的普通物理教材对光栅衍射规律的描述通常忽略推导过程而只给出一些重要的结论,例如暗纹位置公式;或者仅作定性分析,例如明条纹宽度随缝数增多而变窄等．事实上,对于光栅衍射暗纹位置公式可以由振幅矢量法求解,     

浅析中职物理教材中的科学方法

物理学蕴涵的丰富的科学方法,是物理学发展中的灵魂,学习物理必须领悟科学方法．中职物理教学大纲要求：（通过物理教学）要对学生进行科学思想、科学精神、科学方法和科学态度的教育,提高学生的科学素养．     

基于非对称供给使用表的部门异质性分析——以中国生产能耗异质性为例

投入产出表的间断性和时滞性使得投入产出分析的应用受到一定的限制,供给使用表作为投入产出体系的基础数据,与投入产出表相比具有数据易获得、时滞期较短的优点;且供给使用表同时包含了产业和产品两个维度的信息,基于供给使用表的模型可以反映出产业部门和产品部门的生产异质性,即同一产业部门生产不同产品和同一产品被不同产业生产时遵循不...