<正> 1988年10月20日,民主德国科学院古代史考古中央研究所的吐鲁番研究组组长彼得·齐奠博士(Dr.sc Peter zieme)来莫高窟参观访问,与敦煌研究人员进行了学术座谈,武汉大学教授陈国灿、人民大学教授沙知也参加了座谈会。双方交流了敦煌吐鲁番学的研究情况,并互赠了学术著作。双方都希望今后加强学术资料交流与人员来往。
The structure of an intensity modulation optical fiber sensor is introduced.The principle of the sensor which can detect minor displacement by use of minor curv
A technique of electron acceleration in the cone-shaped stationary laser field is proposed. An electron acceleration in this laser is studied, which shows that