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Yanxun Chang
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 Personal Information |
| Title： |
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| Position： |
Full Professor |
| Tel： |
51683600 |
| E-mail： |
yxchang@bjtu.edu.cn |
| Present Address： |
School of Science, Beijing Jiaotong University,No 3. Shangyuancun, Haidian District, Beijing, P.R.China, 100044 |
| Education |
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1992--1995: Ph. D., Department of Mathematics, Suzhou University, Suzhou, China.
1985--1988: M. Math., Department of Mathematics, Hebei Normal College, Shijiazhuang, China.
1981--1985: B. Sc., Department of Mathematics, Hebei Normal College, Shijiazhuang, China.
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| Research Interest |
| 1. Combinatorics, with a special interest in combinatorial designs, such as investigating the existence of large sets of triple systems and other designs, and so on
2. Statistical properties of combinatorial designs
3. Sequences with good correlation, such as optimal optical orthogonal codes, impulse radio sequences and optimal optical signature pattern codes, and so on
4. Graph (or hypergraph) decompositions with certain properties
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| Funding |
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2013.01-2016.12, NSFC, No. 11271042
2009.01-2013, NSFC, No. 61071221
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| Major Publication |
• Y. Chang and G. Lo Faro, The fine structures of three pairwise distinct Latin squares, J. Statistical Planning and Inference, Vol. 139(2009), 2863-2869.
• J. Zhang and Y. Chang, Partitionable sets and cyclic BSECs with block size four, J. Statistical Planning and Inference, Vol. 139(2009), 1974-1979.
• Y. Chang, T. Feng, G. Lo Faro, and A. Tripodi, Two types of switchable $/lambda$-fold $(K_4-e)$-designs, Discrete Math., Vol. 308, Issue 24(2008), 6606-6625.
• Y. Xu, Y. Chang, G. Ge and H. Zhang, Frame self-orthogonal Mendelsohn triple systems of type $h^n$, Discrete Math. 308(2008), 5049-5063.
• T. Feng, Y. Chang, and L. Ji, Constructions for strictly cyclic $3$-designs and applications to optimal OOCs with $/lambda="2$," J. Combin. Theory, Series A 115(2008), 1527-1551.
• C. Fan, J. Lei, and Y. Chang, Constructions of difference systems of sets and disjoint difference families, IEEE Trans. Inform. Theory, Vol. 54, Issue 7(2008), 3195-3201.
• J. Zhou, Y. Chang and L. Ji, The spectrum for large sets of pure Mendelsohn triple systems, Discrete Math., 308(2008), 1850-1863.
• Y. Chang, G. Lo Faro and A. Tripodi, Tight blocking sets in some maximum packings of $/lambda K_n$, Discrete Math., Vol. 308(2008), 427-438.
• T. Feng and Y. Chang, Decompositions of $3$-uniform hypergraph $K^{(3)}_v$ into hypergraph of a certain type, Science in China (A), Vol. 50, No. 7(2007), 1035-1044.
• J. Zhang and Y. Chang, The spectrum of $BSA(v, 3, /lambda; /alpha)$ with $/alpha="2," 3$, J. Combin. Designs, Vol. 15, No. 1(2007), 61-76.
• Y. Chang, The existence spectrum of golf designs, J. Combin. Designs, Vol. 15, No. 1(2007), 84-89.
• J. Zhou, Y. Chang and L. Ji, The spectrum for large sets of pure directed triple systems, Science in China, Ser. A, Chinese: Vol. 36, No. 7(2006), 764-788; English: Vol. 49(2006), 1103-1127.
• Y. Chang and C. Ding, Constructions of external difference families and disjoint difference families, Designs, Codes and Cryptography, Vol. 40, No. 2(2006), 167-185.
• J. Gao and Y. Chang, New upper bounds for impulse radio sequences, IEEE Trans. Inform. Theory, Vol. 52, Issue 5(2006), 2255-2260.
• Y. Xu and Y. Chang, Existence of $r$-self-orthogonal Latin squares, Discrete Math., Vol. 306(2006), 124-146.
• T. Feng and Y. Chang, Existence of Z-cyclic $3$PTWh$(p)$ for prime $p/equiv 1/ ({ mod}/ 4)$, Designs, Codes and Cryptography, Vol. 39, No. 1(2006), 39-49.
• Y. Chang, G. Lo Faro and G. Nordo, The fine structures of three latin squares, J. Combin. Designs, Vol. 14, No. 2(2006), 85-110.
• J. Zhang and Y. Chang, The spectrum of cyclic BSA$(v,3,/lambda; /alpha)$ with $/alpha="2," 3$, J. Combin. Designs, Vol. 13, No.5(2005), 313-335.
• S. Ma and Y. Chang, Constructions of optimal optical orthogonal codes with weight five, J. Combin. Designs, Vol. 13, No. 1(2005), 54-69.
• S. Ma and Y. Chang, A new class of optimal optical orthogonal codes with weight five, IEEE Trans. Inform. Theory, Vol. 50, Issue 8(2004), 1848-1850.
• Y. Chang and L. Ji, Optimal $(4up, 5, 1)$ optical orthogonal codes, J. Combin. Designs, Vol. 12, No. 5(2004), 346-361.
• Y. Chang, Some cyclic BIBDs with block size four, J. Combin. Designs, Vol. 12, No. 3(2004), 177-183.
• Y. Xu and Y. Chang, On the spectrum of $r$-self-orthogonal Latin squares, Discrete Math., Vol. 279, Nos. 1-3(2004), 479-498.
• F. E. Bennett, Y. Chang, G. Ge and M. Greig, Existence of $(v, /{5, w^*/}, 1)$-PBDs, Discrete Math., Vol. 279, Nos. 1-3(2004), 61-105.
• Y. Chang and J. Yin, Further results on optimal optical orthogonal codes with weight 4, Discrete Math., Vol. 279, Nos. 1-3(2004), 135-151.
• Y. Chang, G. Lo Faro and H. Shen, Support sizes of resolvable threefold triple systems, J. Combin. Designs, Vol. 11, No. 4(2003), 275-289.
• Y. Chang, R. Fuji-Hara and Y. Miao, Combinatorial constructions of optimal optical orthogonal codes with weight 4, IEEE Trans. Inform. Theory, Vol. 49, Issue 5(2003), 1283-1292.
• Y. Chang and Y. Miao, Constructions for optimal optical orthogonal codes, Discrete Math., 261(2003), 127-139.
• Y. Chang and Y. Miao, General constructions for double group divisible designs and double frames, Designs, Codes and Cryptography, Vol. 26, Nos. 1-3 (2002), 155-168.
• D. Bryant, Y. Chang, C. A. Rodger and R. Wei, Two dimensional balanced sampling plans excluding contiguous units, Communications in Statistics --Theory and Methods, Vol. 31, No. 8(2002), 1441-1454.
• Y. Chang, The spectrum for large set of idempotent quasigroups, J. Combin. Designs, Vol. 8(2000), 79-82.
• Y. Chang and G. Lo Faro, Intersection numbers of Kirkman triple systems, J. Combin. Theory(A), Vol.86, No. 2 (1999), 348-361.
• Y. Chang, A bound for Wilson''''s general theorem, Science in China, No.11(1999), 969-980; English: Sci. China Ser. A, Vol. 43, No. 2(2000), 128-140.
• Y. Chang, A bound for Wilson''''s theorem (III), J. Combinatorial Designs, Vol. 4, No. 2(1996), 83-93.
• Y. Chang, A bound for Wilson''''s theorem (II), J. Combinatorial Designs, Vol. 4, No. 1(1996), 11-26.
• Y. Chang, A bound for Wilson''''s theorem (I), J. Combinatorial Designs, Vol. 3, No. 1(1995), 25-39.
• Q. Kang and Y. Chang, A completion of the spectrum for large sets of disjoint transitive triple systems, Journal Combin. Theory, Ser.A, Vol. 60, No. 2 (1992), 287-294. |
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Awards & Honors
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-Progress Award of Science and Technology of Hebei Province, the first prize, 1991
-Natural Science Award of the Ministry of Education of China, the second prize, 2000
-The Teaching and Research Award Program for Outstanding Young Teachers in Higher Education Institutions of MOE, P. R. C., 2000
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