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Liu's scientific research achievements
1. once presided over the national natural science foundation project.

2. Participate in major scientific and technological projects of the Ministry of Education.

3. Presided over 2 projects of National Natural Science Foundation.

4. Participated in the completion of two projects of the National Natural Science Foundation (second finisher).

5. Presided over 3 natural science foundation projects in Gansu Province.

6. Participate in major scientific and technological projects of the Ministry of Education. 1. Two monographs, Homology Methods of Monosemigroup Theory (co-authored with Professor Javed Ahsan, I am the second author) and S- series Theory of Semigroups, were published in Science Press.

2. Published 2 1 century textbook Higher Algebra in Higher Education Press. 1 Generalized Semi-π-Regular Ring (English) Mathematical Research and Summary 2009/03 China Journal Full-text Database

Generalized injective modules on triangular matrix rings of type 2 Journal of Lanzhou University (Natural Science Edition) 2009/04 Full-text database of China journals

3 Generalized Macaulay-Northcott Modules and Tor- Groups (English) Mathematics Research and Review 2009/06 China Journal Full-text Database

4 Generalization of Semi-regular Rings (English) Mathematical Research and Comments 2009/06 China Journal Full-text Database

5 KIP- injective model Journal of Northwest Normal University (Natural Science Edition) 2008/02 China Journal Full-text Database

6. Integrate feed resources, reduce feed costs, and comprehensively improve the production efficiency of dairy cows. China Dairy 2008/06 China Journal Full-text Database

7 N- product of relatively flat modules Mathematical research and comments 2008/04 China Journal Full-text Database

PS Properties and CESS Properties of 8- Shaped Triangular Matrix Ring: A Summary of Mathematical Research on China Periodical Full-text Database in 2008/04

9 (I, K)-(m, n)- Injective Ring Pure Mathematics and Applied Mathematics 2007/04 China Journal Full-text Database

Principal Quasi-Baer Properties of 10 Generalized Power Series Ring: China Journal Full-text Database 2007/04

The 1 1 subring of triangular matrix ring satisfies ZC_n(ZI_n) Journal of Northwest Normal University (Natural Science Edition) 2006/02 China Journal Full-text Database.

Semi-commutative subrings of 12 matrix rings: a summary of mathematical research on full-text database of China journals in 2006/02.

Mathematical research and comments on generalized Noether properties of 13 rings 2006/04 China full-text database.

Morita Dual Mathematics Journal Papers 14 Generalized Power Series Ring 2005/02 China Journal Full-text Database

Mathematical research and comment on the principal quasi-Bell property of 15 diagonal power series ring 2005/02 China periodical full-text database

Main quasi-Baer properties of 16 Marcev-Neumann rings: Journal of Mathematics 2005/03 China full-text database

17 weak GPP ore extension-journal of northwest normal university (natural science edition) 2005/03 China journal full-text database

Decomposition Properties of Generalized Power Series Rings over 18 Integral Rings Annual Mathematical Journal A (Chinese Version) 2005/05 China Journal Full-text Database

19 on the scalability of basic countable generating submodules: a summary of mathematical research on China periodical full-text database in 2005/04

20 Semi-commutative Subrings of Upper Triangular Matrix Ring Journal of Southwest Normal University (Natural Science Edition) 2005/05 China Journal Full-text Database

Cohesion dimension of left (,U)- rings 2 1 Mathematical research and comments 2004/0 1 China full-text database.

22 Cohesion dimension and excellent extension of left (n, u)- rings Journal of Northeast Mathematics 2004/0 1 China full-text database.

23 Weak Co-Hopf Properties of Generalized Inverse Polynomial Modulus Journal of Northwest Normal University (Natural Science Edition) 2004/03 China Journal Full-text Database

24 Research and Review on Single Gene and Epigene Modules 2004/04 China Journal Full-text Database

25 co-Hopf Properties of Generalized Inverse Polynomial Modulus Journal of Mathematics 2003/03 China Journal Full-text Database

26 Quasi-Bell Annual General Power Series Annual Series A (Chinese Version) 2002/05 China Journal Full-text Database

Laurent series ring 2002/06 China periodical full-text database, which is mainly quasi-Baer periodical mathematics.

28 Research and Comment on Genetic R- Extended Modulus Mathematics 2002/02 China Journal Full-text Database.

29ps- Modules on Generalized Power Series Ring Journal of Northeast Mathematics 2002/03 China Journal Full-text Database.

Properties of 30 PP Generalized Power Series Ring Journal of Mathematics 200106 China Journal Full-text Database

3 1 Relative Continuity of Local Noether Modules of Journal of Mathematics 200104 China Journal Full-text Database

32 The characterization of V- module by relative quasi-continuity; Journal of Northeast Mathematics 200102 China full-text database.

33 PC- Ring and Almost Optimal Extension (English) Mathematics Quarterly 200103 China Journal Full-text Database

34 Mathematical Research and Comment on the Flatness of Circular System 2000/0 1 China Journal Full-text Database

35. Research and Comments on Local Noether Module (English) China Journal Full-text Database 2000/04

36 Generalized Continuity Characteristics of Almost Local Noether Modules Journal of Northwest Normal University (Natural Science Edition) 2000/0 1 China Journal Full-text Database

Sufficient conditions for the overrun of 37 Smash product Left free normalized expansion and its application Journal of Mathematics 1999/02 China periodical full-text database

Research and Comment on Almost Excellent Extension and Coherent Dimension Mathematics 1999/03 China Journal Full-text Database.

39 Journal of PSF Monosemigroup Mathematics 1999/03 All circular flat systems in China periodical full-text database meet the condition (P).

40 Generalized Power Series Ring and Morita Duality Journal of Northwest Normal University (Natural Science Edition) 1999/02 China Journal Full-text Database

4 1 α- Hereditary Unigroup's injectivity Characteristics Journal of Northwest Normal University (Natural Science Edition) 1999/03 China Journal Full-text Database.

42 Reflections on the Teaching Reform of Algebra Course for Mathematics Education Major in Normal Universities for Nationalities Journal of Northwest Normal University (Natural Science Edition) 1999/03 China Journal Full-text Database

43 Complete α-Absolute Pure Monoid Mathematical Journal 1998/02 China Journal Full-text Database.

Hermite properties of 44 Hurwity sequence rings Journal of Gansu Radio and TV University 1998/04 China full-text periodical database.

45 Clifford semigroup flatness depicts Journal of Northwest Normal University (Natural Science Edition) 1998/02 China Journal Full-text Database.

The superior extension and cohesion dimension of 46-ring mathematics 1998/0 1 China full-text database.

Subdirect Reducibility of a Class of Inverse Semigroups in 47 Journal Papers 1997/03 China Journal Full-text Database

48A Generalization of Regular Left Behavior Northeast Mathematics (English Version) 1997/02 China Journal Full-text Database

Journal of Northwest Normal University (Natural Science Edition) 1997/03 China Journal Full-text Database.

Mathematical research and comment on the characterization of monosemigroups by 50 L-inverse left systems 1996/03 China periodical full-text database

5 1 Journal of Pure Mathematics About S Series 1996/02 China Journal Full-text Database.

52 Characterization of Inverse Semigroups and Left Inverse Semigroups 1 ┐ Behavior Northeast Mathematics 1996/04 China Journal Full-text Database.

53 Generalized Advantage Expanding Journals Jiangsu Institute of Petrochemical Technology 1996/03 China Journals Full-text Database

54 Excellent Promotion and Smach Products Journal of Northwest Normal University (Natural Science Edition) 1996/0 1 China Journal Full-text Database

Journal of Northwest Normal University (Natural Science Edition) 1996/03 China Journal Full-text Database.

Generalized injectivity characterization of 56f-V- rings Journal of Mathematics 1995/02 China full-text database.

Journal of Zuoquan Single Group Mathematics 1995/06 China Journal Full-text Database

58 Journal of Mathematics on Complete Ring and Noether Ring 1995/02 China Journal Full-text Database

Top 59 Journals of Mathematics of Zhongyou S Department 1995/04 Full-text Database of China Journals

Quasi-continuous modulus characteristics of 60 F-V- rings Northeast Mathematics 1995/04 China full-text database

6 1 Circle Product Pure System Journal of Northwest Normal University (Natural Science Edition) 1995/03 China Journal Full-text Database

Research and Comment on Artin Semi-simple Ring Characteristic Mathematics 1994/04 China Journal Full-text Database

63 Journal of Northeast Mathematics on Right Genetic Ring and Dedekind Domain 1994/03 China Journal Full-text Database

Excellent development of 64 rings Northeast Mathematics 1994/04 China periodical full-text database

65 injective strong coverage and quasi-Frobenius ring Journal of Northwest Normal University (Natural Science Edition) 1994/0 1 China periodical full-text database

66 Regularity Weakly Flat Left System Flatness Journal of Northwest Normal University (Natural Science Edition) 1994/02 China Journal Full-text Database

67 F- pure submodule Journal of Northwest Normal University (Natural Science Edition) 1993/0 1 China Journal Full-text Database

68- Extended Journal of Environmental Optimization Mathematics199106 Full-text Database of China Journals

69 Injection Pre-Covering Mathematical Journals199104 China Journals Full-text Database

70 F- Flat Modulus and F- Flat Dimension Journal of Northwest Normal University (Natural Science Edition)199104 China Journal Full-text Database

7 1 F-V- Ring's Quasi-injectivity Description Journal of Northwest Normal University (Natural Science Edition)19910/China Journal Full-text Database.

72 A commutativity theorem of rings related to commutative nilpotent subsets Journal of Liaoning Normal University (Natural Science Edition) 1990/0 1 China periodical full-text database.

73 injective pre-coverage and injective coverage in the category of Grothendieck Journal of Northwest Normal University (Natural Science Edition) 1989/03 China Journal Full-text Database

74f—- injectivity and F- injectivity cover Journal of Northwest Normal University (Natural Science Edition) 1988/02 China Journal Full-text Database.

Generalization of 75 Hestan Theorem Journal of Hubei Normal University (Natural Science Edition) 1987/0 1 China Journal Full-text Database

76 Some Theorems about Rings Journal of Northwest Normal University (Natural Science Edition) 1987/02 China Journal Full-text Database

77 Several Sufficient Conditions for noetherian ring to be Artin Ring Journal of Hubei Normal University (Natural Science Edition) 1986/02 China Journal Full-text Database

Some Exchange Theorems of Ring 78 Journal of Northwest Normal University (Natural Science Edition) 1986/04 China Journal Full-text Database