关于“信息熵”分析及其应用的研究

本文用Ｓｈａｎｎｏｎ熵函数的观点及最大离散熵原理，探讨了对随机试验项目的优选问题：即压缩某种“不确定性”试验项目的实施与探索．并通过应用实例的计算，获得了满意的聚类效果．这种方法对于信息资料的数据处理及压缩“不确定性“验项目具有普遍意义．     

大肠杆菌HB101感受态细胞的显微观察与分析

对数生长前期的大肠杆菌在生理盐水中用CaCl2可以直接诱导建立感受态并完成转化过程。利用H－8100透射电子显微镜观察用CaCl2直接在生理盐水中诱导建立感受态的大肠杆菌细胞，发现感受态细胞整体电子密度趋于均匀，但存在有电子密度较高颗粒，表明大肠杆菌感受态建立过程中，细胞整体对电子通透性增强，可能存在涉及细胞膜通透性的复合物重新形成相关的胞内物质代谢及其在细胞内定位的受控改变，暗示大肠杆菌可能具有建立自然感受态的能力。     

Auditory evoked responses: A tool to assess the fetal neurological activity

An intact auditory system at birth is requisite for the successful accomplishment of many developmental skills. Evoked responses to auditory stimuli have been used as a sensitive test to determine the functional status of the adult and neonatal brain. It has been established that fetuses can hear in utero and respond to external acoustic stimuli. We present an overview of the transmission of sound through the maternal abdomen to the fetal ear and the recordings of an auditory evoked response obtained from the fetus using a non-invasive magnetoencephalography technique. The investigation of cortical activity of the fetus in response to auditory stimulation can help understand and track the neurological development of the fetus.     

对比式离心现象实验装置

为了弥补现行教科书中,离心运动的演示实验装置及离心现象产生实质的知识呈现不足,设计了符合学生认知规律的离心实验装置.该装置通过对比2个物体在相同的角速度下产生相反的运动状态,说明物体做离心运动,不是由角速度产生,而是只有合外为突然消失或是合外力不足以提供向心力时,才能产生离心运动.     

A MINI MULTI-GAS DETECTION SYSTEM BASED ON INFRARED PRINCIPLE

To counter the problems of gas accidents in coal mines, family safety resulted from using gas, a new infrared detection system with integration and miniaturization has been developed. The infrared detection optics principle used in developing this system is mainly analyzed. The idea that multi gas detection is introduced and guided through analyzing single gas detection is got across. Through researching the design of cell structure, the cell with integration and miniaturization has been devised. The way of data transmission on Controller Area Network (CAN) bus is explained. By taking Single-Chip Microcomputer (SCM) as intelligence handling, the functional block diagram of gas detection system is designed with its hardware and software system analyzed and devised. This system designed has reached the technology requirement of lower power consumption, mini-volume, big measure range, and able to realize multi-gas detection.     

固体密度秤

根据杠杆平衡原理,使用杠杆平衡仪设计了固体密度秤.采用与液体密度计读数类似的方法,能够直接读出被测固体的密度.     

牛顿环中心暗斑大小对测量结果影响的研究

本文分析了牛顿环中心暗斑大小对测量结果的影响,并给出了解决方法。     

含有五边形—七边形缺陷的单壁纳米碳管的输运性质研究

运用第一性原理的密度泛函理论结合非平衡格林函数研究了含有五边形—七边形拓扑缺陷的纳米碳管异质结的输运性质.结果发现：拓扑缺陷对碳管的输运性质有很大影响；另外，不同类型的碳管形成的异质结的输运性质也有明显的差异. 关键词： 纳米碳管 输运性质 异质结 透射系数     

塑料闪烁体的辐照特性

利用⁶⁰Co放射源分别对3种塑料闪烁体(BC-408, EJ-200, BC-404)进行辐照损伤研究, 比较辐照前后的透射谱、发射谱及光产额的变化, 发现3种闪烁体在低剂量具有较好的抗辐照性能; 当照射剂量超过1.44×10⁴Gy时,透射谱明显变坏, 光输出减少很严重, 但发射谱却保持不变.     

大学物理实验教学的认识与体会

本文结合工作实际介绍了大学物理实验教学的认识与体会。