Seminars Chinese University ''Huckel Spectrum for Large Carbon Fullerenes and Tubes'' delivered by Professor C. N. Yang, by Physics Department. L1, Science Centre. Tomorrow. 3.30 pm to 4.30 pm. (English). * * *University of Science and Technology ''Some Policy Issues in Electronic Trading Systems'' by Department of Information & Systems Management. Room 3402. Today. 10 am to 11 am. (English). * * *''Wireless Communications Systems and Standards: An Overview'' by Department of Electrical & Electronic Engineering. Room 2465. Today. 11 am to noon. (English). * * *''Adaptive Optoelectronic Packaging Using Silicon Surface-Micromachined, Actuated Alignment-Mirrors'' by Department of Physics. Lecture Theatre H. Tomorrow. 3 pm to 4 pm. (English). * *''On the Parallel Complexity of Solving Recurrence Equations'' by Department of Computer Science. Room 4502 (Lift numbers 25 & 26). August 30. 3 pm to 4 pm. (English). * * * LecturesChinese University ''Automation of Cytology Laboratory' by Professor George Wied, chairman of Committee on Continuing Education and Quality Assurance, the International Academy of Cytology, Chicago. Seminar Room 1, 2/F, Clinical Sciences Building. August 31. 9 am. (English). * * *University of Science and Technology ''Neural Network: From the Brain to Artificial Intelligence'' by PAO, PVCAA's Office and HK Science Museum. Lecture Hall, HK Science Museum. August 28. 11 am to 12.30 pm. (Cantonese) * * * ConferencesUniversity of Science and Technology 14th International Conference on Raman Spectroscopy by the Organising Committee of ICORS. Lecture Theatres A,B,C & D. Today. 9 am to 5 pm. (English). Until tomorrow. * * * ExhibitionsUniversity of Hong Kong Road Show Exhibition 1994 on ''Advances in Biomedical Sciences and Technology'' by Faculty of Medicine. Main Concourse, Ocean Terminal Tsim Sha Tsui, Kowloon. Today. 10 am to 7 pm. * * *Chinese University ''Exhibition of Chinese Archaic Jades from the Kwan Collection''. Art Gallery West Wing. Until October 9. 10 am to 4.30 pm. Sunday and Holidays - 12.30 pm to 4.30 pm. * * *''Print Works by Contemporary Japanese Artists''. G/F, Cheng Ming Building, New Asia College. Until September 16. 9.30 am to 4.30 pm. Saturday - 9.30 am to noon, Sunday and holidays - closed. * * * MiscellaneousChinese University ICRO Symposium on ''Recent Advances in Cell Biology'' by Biology Department. Cho Yiu Conference Hall. Today. 8.30 am to 5.30 pm. (English). * * *Workshop on Lightwave, Wireless and Networking Technologies by Information Engineering. LT1 Lady Shaw Building. Today. 9 am to 5 pm. (English). * * *International Training Course on ''Advances in Waste-water Treatment Technology'' by Biology Department of CUHK, United Nations Educational, Scientific & Cultural Organisation - International Cell Research Organisation. L5, Science Centre. Today. 9 am to 5 pm. (English). Until August 27. * * *1994-95 United College Orientation Ceremony by Dean of Students' Office, United College. Sir Run Run Shaw Hall. August 31. 11 am to 12.30 pm.