对超重、失重演示实验的改进

对传统的超重、失重演示实验进行了改进,使弹簧秤的指针能静止在超重(或失重)的位置上,从而能准确地读出读数,提高演示效果.     

论大学物理实验体系建设与教学改革

传统的物理实验是按普通物理、电子线路和近代物理等内容进行划分，这种体系突出了学科的系统性，但忽视了学科之间的兼容互补性，各学科相互独立，限制了学生跨学科思维能力和创新能力的培养，建立现代物理实验教学新体系是大学物理实验教学改革的必然趋势．新的物理实验体系应依照训练层次，划分为引导性实验、基本实验、综合性实验、设计性实验、研究性实验．并需要注重时代性和先进性，改革和更新大学物理实验教学内容，改革实验教学与管理模式，形成新的运行机制，从而达到学生素质和能力的提高．     

Remote stereocontrol by the sulfinyl group: Mukaiyama aldol reactions of (S)-2-[2-(p-tolylsulfinyl)phenyl]acetaldehyde in the asymmetric synthesis of β-hydroxyacids and 1,3-diols

(S)-2-[2-(p-Tolylsulfinyl)phenyl]acetaldehyde reacts with different O-silylated ketenethioacetals in the presence of Yb(OTf)₃ yielding β-hydroxythioesters in high yields and diastereoselectivities. The obtained compounds were readily transformed into β-hydroxyacids and their corresponding diols. These Mukaiyama aldol reactions are a direct evidence of the ability of the sulfinyl group to control 1,5- and 1,6-asymmetric induction processes.     

A study of structural, compositional and optical properties of spray-deposited non-stoichiometric (Zn,Fe)S thin films

Non-stoichiometric ternary chalcogenides (Zn,Fe)S were prepared in the film form by pyrolytic spray deposition technique, using air/nitrogen as the carrier gas. The precursor solution comprised of ZnCl₂, FeCl₂ and thiourea. The depositions were carried out under optimum conditions of experimental parameters viz. carrier gas (air/nitrogen) flow rate, concentration of precursor constituents, nozzle substrate distance and temperature of quartz substrate. The deposited thin films were later sintered in argon at 1073 K for 120 min.The structural, compositional and optical properties of the sintered thin films were studied. X-ray diffraction studies of the thin films indicated the presence of (Zn,Fe)S solid solution with prominent cubic sphalerite phase while surface morphology as determined by scanning electron microscopy (SEM) revealed a granular structure.The chemical composition of the resulting thin films as analyzed by energy dispersive X-ray analysis (EDAX) reflected the composition of the precursor solutions from which the depositions were carried out with Fe at% values ranging from 0.4 up to 33.SEM micrographs of thin films reveal that the grain sizes of the thin films prepared using air as carrier gas and N₂ as carrier gas are in the vicinity of 300 and 150 nm, respectively.The diffuse transmittance measurements for thin films, as a function of wavelength reveal the dependence of direct optical band gap on Fe content and type of phase.     

开设实验选修课培养学生创新能力

介绍了复旦大学物理教学实验中心为培养学生创新能力开设的4门实验选修课的特点、要求以及在培养学生创新能力方面取得的成效。     

大学物理实验中分类教学的探索和研究

本文对大学物理实验课程的教学现状进行了分析,提出了对大学物理实验课程进行分类教学改革的指导思想和遵循的原则及采取的措施。     

网络环境下的物理实验教学模式

目前网络环境下的物理实验教学新模式主要有物理实验专题网站、实验教学网络管理、实验类网络课程及远程控制物理实验.本文简要介绍了各个模式的特点及实施方法.     

普通物理实验教学改革的实践与思考

本文介绍了近年来普通物理实验课程体系和教学内容改革的实践,并针对目前实验教学中仍存在的一些问题提出了开放式实验教学的改革思路。     

2-芳基-3-N-丙酰基-5-(4-溴苯基)-1,3,4-噁唑啉类化合物的合成

噁唑啉类化合物是重要的杂环族化合物,在农药化学和医药化学中应用及其广泛。在现有的文献中已报道的大多是3-N乙-酰基-1,3,4噁-唑啉类化合物的合成[1-6],而3-N乙-酰基-1,3,4噁-唑啉类化合物的合成却很少见。为了深入研究同一分子中聚集不同骨架杂环化合物的合成以及开发新型高     

The Millimeter Wave Tomography Application for the Subsurface Imaging

In the present paper new results of modeling and experimental investigation on millimeter wave subsurface tomography are submitted. Tomographic algorithm is employed for imaging of subsurface objects in the case when conductivity of probed medium is not equal to zero. The possibilities and restrictions of this algorithm for image processing are shown both as a result of modeling and as a result of experiments. A new tomography setup allowing obtaining images of different inhomogeneities in dielectric media is considered.