室内甲醛气体浓度低,降解难度大.介绍了纳米二氧化钛(TiO2)光催化氧化降解室内甲醛气体的原理,详细探讨了提高光催化降解甲醛效果的方法,包括:TiO2催化剂改性;选用吸附性强的催化剂载体;提高光利用率;超声辅助催化和等离子体耦合.并对TiO2在可见光下催化降解室内甲醛的研究方向进行了进一步的展望.

当前,放射性医疗受检者对放射性医疗检查所接收放射性没有足够的认识及相应的重视,导致其年受照剂量可能出现超标现象.因此结合《个人和环境监测用热释光剂量测量系统》,利用热释光法,对衡阳市区部分三甲级医院的X光机对受检者不同体位受照剂量进行调查,为受检者接受放射性检查提供参考.

Task-driving method takes the student as the main body and the task as the main line. In conjunc-tion with the teaching practice of reactor thermal-hydraulic course design, the paper explores the application of task-driving method in the course design. By taking the single channel steady-state thermal analysis of pressurized water reactor core as an example, the paper discusses the application of task-driving method in the reactor thermal-hy-draulic course design through the scientific design of task and reasonable setting of implementation plan and effective optimizing of the evaluation system. The results show that it not only improves the practical ability of students but also cultivates students' ability to analyze and solve problems and fully taps the students' creative potential.

Radiation dose and protection experimental teaching is a necessary component of nuclear science study .In order to cultivate students’ independent thinking and problem solving abilities, we implemented those reform of experimental teaching method and developed teaching mode of applying theory to practice, including arousing the students enthusiasm of Innovative thinking ,leading students to design and optimize experimental schemes, measureing in-situ and analysing the experimental data. The practice of teaching proves that the students' practical and social living capabilities have been improved and learning interest has been motivated .Good teaching effect has been received.

实验教学中教学内容陈旧、与社会需要联系不紧密、教学手段单一等问题凸显，改革势在必行。根据实验教学中存在的问题，提出了核类专业实验教学改革的思路、目标。通过改革实验教学的内容、实验课程体系、教学方法和手段、实验考核方式调动了学生的兴趣和积极性。改革有利于培养动手能力强、开拓创新的复合型人才。

This paper states the working principle, system structure and the theory simulation results of the cavity type beta-ray dust measurement technology which has an advantage in on-line continuous monitoring the concentration of dust , studies its possible effects on dust monitoring and puts forward the theoretical scheme of developing the measuring instrument.

This paper gives an account about the technological status-quo,working principles and configuration of β-ray dust monitoring technology that plays a unique role in on-line dust monitoring and control in coal mines.Also presented is a comparison between this new technology and other traditional dust monitoring devices.The paper also presents a study on the application of this β-ray dust monitoring and control technique in coal mines and related application results as well as some technical plans designed to improve the dust testing accuracy.

The design of FSK transmitter circuit based on CC1050 is introduced in this paper.The circuit features operation frequency from 300MHz to 1000MHz.FSK modulate proprammable transmitter power from-20 dBm to 12dBm.The typical application circuit of CC1050,the interface circuit of CC1050 and microcontroller are given.So that,FSK transmitter circuit is very simple,it can work at different frequency.

概述了湘江水及自来水进行样品处理和制备样品源的实验方法,用BH1217B型低本底弱α、β金硅面垒测量仪对样品源进行了总α、β活度的精确测量,对实验数据和某些影响实验结果精确性的不确定因素进行了详细的分析。正确的计算了水中总α、β放射性比活度值及其标准偏差。

The designed networking motor vehicle park system takes single chip computer as execution core,software as monitor core.It supplies the solution for automatic monitoring and information manage network.Using computer network technology and RS 485 industrial bus,the scale of park can be extended without limit.In the access control machine adds information storage circuit effectively avoid the phenomenon of communication jam,and the database of up-level computer is backuped by collecting information from down-level computer controlling doors,thus ensuring the stability of system operation without error.Such design with minimum redundancy achieves the upper and lower machine complement each other,complementary software and hardware to run,ensuring the stability of the system error-free run.