Forward and inverse problem for cardiac magnetic field and electric potential using two boundary element methods

This paper discusses the forward and inverse problem for cardiac magnetic fields and electric potentials.A torso-heart model established by boundary element method(BEM) is used for studying the distributions of cardiac magnetic fields and electric potentials.Because node-to-node and triangle-to-triangle BEM can lead to discrepant field distributions,their properties and influences are compared.Then based on constructed torso-heart model and supposed current source functional model-current dipole array,the magnetic and electric imaging by optimal constrained linear inverse method are applied at the same time.Through figure and reconstructing parameter comparison,though the magnetic current dipole array imaging possesses better reconstructing effect,however node-to-node BEM and triangleto-triangle BEM make little difference to magnetic and electric imaging.     

利用F—P标准具组实时测量被动入射激光波长

从理论上分析利用Ｆ－Ｐ标准具组实时测量被动入射激光波长的能量分布及信噪比，提供了计算公式及误差分析，给出了实验光路图，处理软件框图和一组实验照片，最后对给出的实验结果数据进行了讨论。     

基于热致非线性效应的暗空间光孤子实验研究

实验研究了热致非线性效应作用下，Ｃ＾６０甲苯溶液中强连续激光激发暗空间光孤子的过程，并给出了数值模拟结果。     

以梯度光强为背景的暗空间光孤子的研究

本文用数值计算的方法对以梯度光强为背景的暗空间光弧子进行了研究,模拟了孤子的运动行为.     

基于心磁信号的心脏电流偶极子阵列成像及相关性质的研究

超导量子干涉器（SQUID）能探测到微弱的心脏磁场信号. 通过对所得的心磁信号进行分析,可为许多心脏疾病的诊断提供依据. 利用心磁信号,采用极小范数最小二乘法（MNLS）对心脏的电流偶极子阵列进行重建,从而实现了对心脏内部等效电流源的成像. 在使用MNLS进行电流偶极子阵列反演重建的过程中,反演所需的心磁信号,分别由单电流偶极子和电流多极子作为激发源模拟得到,以及由SQUID实际测量得到. 同时,对不同心磁信号反演得到的电流偶极子的分布规律进行了分析. 此外,还给模拟的人体外心磁信号施加了均匀噪声和随机噪声,研究不同信噪比的均匀噪声和随机噪声对电流偶极子阵列重建的影响.     

利用F－P标准具组实时测量被动入射激光波长

从理论上分析利用Ｆ－Ｐ标准具组实时测量被动入射激光波长的能量分布及信噪比，提供了计算公式及误差分析，给出了实验光路图、处理软件框图和一组实验照片；最后对给出的实验结果数据进行了讨论。     

叶绿素丙酮溶液中热致暗空间光孤子实验

设计了热致暗空间光孤子的实验光路和偶边界条件的实施方案，在叶绿素丙酮溶液中实现了热致暗空间光孤子实验，并采用分步傅里叶变换法进行了数值模拟，发现两者的结果一致。     

慈溪市耕地中有机氯农药残留研究

分析了慈溪市耕地284个土壤样品的有机氯农药（六氯环己烷俗称六六六，双对氯苯基三氯乙烷俗称滴滴涕）残留状况．六六六残留量在不同土类之间无显著差异，但滴滴涕残留量差异明显，表现为潮土最高；水稻土次之；滨海盐土最低．按照国家无公害农产品产地环境质量标准中六六六和滴滴涕的限量标准，慈溪市99．6％的耕地符合无公害农产品产地的环境质量要求．     

A new magneto-cardiogram study using a vector model with a virtual heart and the boundary element method

A cardiac vector model is presented and verified, and then the forward problem for cardiac magnetic fields and electric potential are discussed based on this model and the realistic human torso volume conductor model, including lungs. A torso-cardiac vector model is used for a 12-lead electrocardiographic (ECG) and magneto-cardiogram (MCG) simulation study by using the boundary element method (BEM). Also, we obtain the MCG wave picture using a compound four-channel HTc ·SQUID system in a magnetically shielded room. By comparing the simulated results and experimental results, we verify the cardiac vector model and then do a preliminary study of the forward problem of MCG and ECG. Therefore, the results show that the vector model is reasonable in cardiac electrophysiology.