مقالات علمی چاپ شده در مجلات

1. "Solvability of Solid Tumor Invasion Model"
   V. N. Deiva Mani, S. Marshal Anthoni, Nematollah Niamoradi
   Results in Mathematics, pp.1-24, 2021
2. "Existence to Fractional Critical Equation with Hardy-Littlewood-Sobolev Nonlinearities"
   Nematollah Niamoradi, Abdolrahman Razani
   ACTA MATHEMATICA SCIENTIA, pp.1321-1332, 2021
3. "Analysis of a Virus Model with Cure Rate, General Incidence Function and Time Delay"
   Pegah Tagheie karaji, Nematollah Niamoradi
   Iranian Journal of Science and Technology Transaction A-Science, pp.1-14, 2021
4. "Existence and non-existence results for fractional Kirchhoff Laplacian problems"
   Nematollah Niamoradi, Vincenzo Ambrosio
   Analysis and Mathematical Physics, 2021
5. "Solutions for the fractional p-Laplacian systems with several critical Sobolev-Hardy terms"
   Iraj Dehsari, Nematollah Niamoradi
   differential equations applications, pp.15-33, 2021
6. "Existence of solutions to a Kirchhoff Q-Hilfer fractional p-Laplacian equations"
   Roozbeh Ezati, Nematollah Niamoradi
   MATHEMATICAL METHODS IN THE APPLIED SCIENCES, 2021
7. "Existence and multiplicity of positive solutions to fractional Laplacian systems with combined critical Sobolev terms"
   Shahla Amiri, Nematollah Niamoradi, Abolfazl Behzadi, Vincenzo Ambrosio
   POSITIVITY, pp.1-30, 2021
8. "Multiplicity of Solutions for Kirchhoff Fractional Differential Equations Involving the Liouville-Weyl Fractional Derivatives"
   Ali Ashraf Nori, Nematollah Niamoradi, Nasrin Eghbali
   Journal of Contemporary Mathematical Analysis-Armenian Academy of Sciences, pp.13-31, 2020
9. "Mathematical analysis of an optimal control problem for the predator-prey model with disease in prey"
   Puthur Thangaraj Sowndarrajan, Nematollah Niamoradi, Lingeshwaran Shangerganesh, Jeyaraj Manimaran
   OPTIMAL CONTROL APPLICATIONS and METHODS, 2020
10. "Existence and multiplicity of solutions to fractional p-Laplacian systems with concave-convex nonlinearities"
    Hamed Alsulami, Mokhtar Kirane, Shabab Alhodily, Tareq Saeed, Nematollah Niamoradi
    Bulletin of Mathematical Sciences, 2020
11. "Analysis of a fractional SIR model with General incidence function"
    Pegah Tagheie karaji, Nematollah Niamoradi
    APPLIED MATHEMATICS LETTERS, 2020
12. "Multiple solutions for Hardy nonlocal fractional elliptic equations in $R^N$"
    Shahla Amiri, Nematollah Niamoradi, Abolfazl Behzadi
    Journal of Nonlinear Functional Analysis, pp.1-12, 2019
13. "Finite-time blow-up of solutions to a cancer invasion mathematical model with haptotaxis effects"
    L. Shangerganesh, Nematollah Niamoradi, S. Karthikeyan, G. Sathishkumar
    COMPUTERS and MATHEMATICS WITH APPLICATIONS, pp.2242-2254, 2019
14. "Existence of solutions for nonlinear fractional order p-Laplacian differential equations via critical point theory"
    Nematollah Niamoradi, Stepan Tersian
    Fractional Calculus and Applied Analysis, pp.945-967, 2019
15. "Existence of positive solutions for Hardy nonlocal fractional elliptic equations involving critical nonlinearities"
    Somayeh Rastegarzadeh, Nematollah Niamoradi
    Topological Methods in Nonlinear Analysis, pp.1-16, 2019
16. "Existence and multiplicity of solutions for Hardy nonlocal fractional elliptic equations involving critical nonlinearities"
    Somayeh Rastegarzadeh, Nematollah Niamoradi, Vincenzo Ambrosio
    Journal of Fixed Point Theory and Applications, pp.1-22, 2019
17. "Local Fractional Operator for Analytical Solutions of the K(2, 2)-Focusing Branch Equations of Time-Fractional Order"
    S. O. Edeki, G. O. Akinlabi, Nematollah Niamoradi
    International Journal of Applied and Computational Mathematics, pp.1-9, 2018
18. "VARIATIONAL METHODS FOR KIRCHHOFF TYPE PROBLEMS WITH TEMPERED FRACTIONAL DERIVATIVE"
    Nematollah Niamoradi, YONG ZHOU, BASHIR AHMAD, AHMED ALSAEDI
    Electronic Journal of Differential Equations, pp.1-13, 2018
19. "On the existence of weak solutions of nonlinear degenerate parabolic system with variable exponents"
    L. Shangerganesh, Nematollah Niamoradi, V.N. Deiva Mani, S. Karthikeyan
    COMPUTERS and MATHEMATICS WITH APPLICATIONS, pp.322-334, 2018
20. "Existence of nontrivial solutions for Kirchhoff type fractional differential equations with Liouville-Weyl fractional derivatives"
    Elham Tayyebi, Nematollah Niamoradi
    Journal of Nonlinear Functional Analysis, pp.1-19, 2018
21. "Existence of Solutions for a Class of Fractional Boundary Value Equations with Impulsive Effects via Critical Point Theory"
    Nematollah Niamoradi, Elham Tayyebi
    Mediterranean Journal of Mathematics, 2018
22. "Nontrivial Solutions for Time Fractional Nonlinear Schrdinger-Kirchhoff Type Equations"
    Nematollah Niamoradi, Y. Zhou, Elham Tayyebi, B. Ahmad, A. Alsaedi
    DISCRETE DYNAMICS IN NATURE AND SOCIETY, pp.1-9, 2017
23. "Existence and Multiplicity of Solutions for Impulsive Fractional Differential Equations"
    Nematollah Niamoradi
    Mediterranean Journal of Mathematics, 2017
24. "On a fractional advection dispersion equation in R involving a critical nonlinearity"
    Nematollah Niamoradi, Nasrin Eghbali, Aliashraf Nouri
    TBILISI MATHEMATICAL JOURNAL, pp.285-293, 2017
25. "Multiplicity of Homoclinic Solutions for Fractional Hamiltonian Systems with Subquadratic Potential"
    Nematollah Niamoradi, Ahmed Alsaedi, Bashir Ahmad, Yong Zhou
    Entropy, 2017
26. "Impulsive fractional boundary value problem with p-Laplace operator"
    César E. Torres Ledesma, Nematollah Niamoradi
    Journal of Applied Mathematics and Computing, pp.257-278, 2017
27. "Existence and multiplicity of solutions for fractional p -Laplacian SchrdingerKirchhoff type equations"
    Nematollah Niamoradi, Lahib Ibrahim Zaidan
    Complex Variables and Elliptic Equations, pp.1-14, 2017
28. "Variational Approach to Homoclinic Solutions for Fractional Hamiltonian Systems"
    Nematollah Niamoradi, Yong Zhou, Bashir Ahmad, Ahmed Alsaedi
    JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS, pp.223-237, 2017
29. "Multiplicity of solutions to fractional Hamiltonian systems with impulsive effects"
    Nematollah Niamoradi, Rosana Rodr?guez-L?pez
    CHAOS SOLITONS and FRACTALS, pp.254-263, 2017
30. "EXISTENCE OF SOLUTIONS FOR DEGENERATE KIRCHHOFF TYPE PROBLEMS WITH FRACTIONAL p-LAPLACIAN"
    Nematollah Niamoradi, LAHIB IBRAHIM ZAIDAN
    Electronic Journal of Differential Equations, pp.1-13, 2017
31. "ON BOUNDARY VALUE PROBLEM FOR FRACTIONAL DIFFERENTIAL EQUATIONS"
    محمد رسول حميدي, Nematollah Niamoradi
    Bulletin of the Iranian Mathematical Society, pp.789-805, 2017
32. "Homoclinic Orbits for a Class of Fractional Hamiltonian Systems via Variational Methods"
    Nematollah Niamoradi, Yong Zhou
    JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS, 2016
33. "MULTIPLE SOLUTIONS FOR A NONLINEAR FRACTIONAL BOUNDARY VALUE PROBLEMS VIA VARIATIONAL METHODS"
    Nematollah Niamoradi, YONG ZHOU
    Fixed Point Theory, pp.111-122, 2016
34. "Dynamic analysis of a fractional order system"
    M. Javidi, Nematollah Niamoradi
    International Journal of Biomathematics, 2015
35. "Solutions of the Quasilinear Elliptic Systems with Combined Critical Sobolev Hardy Terms"
    Nematollah Niamoradi
    Ukrainian Mathematical Journal, pp.891-915, 2015
36. "Variational approach to solutions for a class of Kirchhoff type fractional differential equations without compactness conditions"
    Nematollah Niamoradi, محمد رسول حميدي
    Journal of Contemporary Mathematical Analysis-Armenian Academy of Sciences, pp.275-286, 2015
37. "On boundary value problems for impulsive fractional differential equations"
    Nematollah Niamoradi, Rosana Rodr?guez-L?pez
    APPLIED MATHEMATICS AND COMPUTATION, pp.874-892, 2015
38. "AN EXTENSION OF THE LAX-MILGRAM THEOREM AND ITS APPLICATION TO FRACTIONAL DIFFERENTIAL EQUATIONS"
    Nematollah Niamoradi, محمد رسول حميدي
    Targeted Oncology, pp.1-9, 2015
39. "Multiple solutions for weighted nonlinear elliptic system involving critical exponents"
    Nematollah Niamoradi, hsu tsingsan
    Science China-Mathematics, 2015
40. "Existence of solutions for a Kirchhoff type fractional differential equations via minimal principle and Morse theory"
    Nematollah Niamoradi, Yong Zhou
    Topological Methods in Nonlinear Analysis, pp.617-630, 2015
41. "Existence of solutions for a class of second-order differential equations with impulsive effects"
    Nematollah Niamoradi
    MATHEMATICAL METHODS IN THE APPLIED SCIENCES, pp.5023-5033, 2015
42. "Dynamics of SVEIS epidemic model with distinct incidence"
    Nematollah Niamoradi, M. Javidi, B. Ahmad
    International Journal of Biomathematics, 2015
43. "Existence of solutions for second-order impulsive differential inclusions"
    Nematollah Niamoradi, Yu Tian
    MATHEMATICAL METHODS IN THE APPLIED SCIENCES, pp.2229-2242, 2015
44. "Multiplicity of Nontrivial Solutions for Boundary Value Problem for Impulsive Fractional Differential Inclusions Via Nonsmooth Critical Point Theory"
    Nematollah Niamoradi
    Fractional Calculus and Applied Analysis, pp.1470-1491, 2015
45. "Existence of solutions for a kirchhoff-type-nonlocal operators of elliptic type"
    Nematollah Niamoradi, kaimin teng
    COMMUNICATIONS ON PURE AND APPLIED ANALYSIS, 2015
46. "A fractional-Order toxin producing phytoplankton and zooplankton system"
    محمد جاويدي, Nematollah Niamoradi
    International Journal of Biomathematics, 2014
47. "Existence and Multiplicity of Solutions for Second-Order Impulsive Differential Inclusions"
    Nematollah Niamoradi
    Journal of Contemporary Mathematical Analysis-Armenian Academy of Sciences, 2014
48. "Uniqueness and existence of positive solutions for singular fractional differential equations"
    Nematollah Niamoradi, طاهره بشيري, منصور واعظ پور, دوميترو بالانيو
    Electronic Journal of Differential Equations, 2014
49. "Existence of Multiple positive solutions for semilinear elliptic systems Involving m critical Hardy-Sobolev exponents and m Sign-Changing weight function"
    Nematollah Niamoradi
    ACTA MATHEMATICA SCIENTIA, 2014
50. "Infinitely Many Solutions for a class of Fractional Boundary Value Problems with Dirichlet Boundary Conditions"
    Nematollah Niamoradi
    Mediterranean Journal of Mathematics, 2014
51. "Bifurcation results for a class of fractional Hamiltonian systems with Liouville-Weyl fractional derives"
    zhou yong, Nematollah Niamoradi
    JOURNAL OF VIBRATION AND CONTROL, 2014
52. "Existence solutions for nonlocal fractional differential equation with nonlinear boundary conditionss"
    Nematollah Niamoradi, حسين اعلايي ديزجي
    Iranian Journal of Science and Technology Transaction A-Science, 2014
53. "Existence of solutions to nonlocal kirchhoff equations of elliptic type via genus theory"
    Nematollah Niamoradi, Nguyen Thanhchung
    Electronic Journal of Differential Equations, 2014
54. "Existence of positive solutions for a quasilinear elliptic system involving critical Sobolev-Hardy exponents and concave-convex nonlinearities"
    Nematollah Niamoradi, Mohsen Shekarbaigie
    Arabian Journal of Mathematics, 2013
55. "Positive Solutions to Fractional Boundary Value Problems with Nonlinear Boundary Conditions"
    Nematollah Niamoradi, Dumitru Baleanu, TAHEREH BASHIRI
    ABSTRACT AND APPLIED ANALYSIS, 2013
56. "Existence and uniqueness of Positive solutions to fractional boundary value Problems with nonlinear boundary conditions"
    Nematollah Niamoradi, Dumitru Baleanu, Ravi Agarwal
    Advances in Difference Equations, 2013
57. "on a multipoint boundary value problem for a fractional order differential inclusion on an infinite interval"
    Nematollah Niamoradi, Dumitru Baleanu, Ravi P. Agarwal
    Advances in Mathematical Physics, 2013
58. "Multiplicity results for a class of fractional boundary value problems depending on two parameters"
    Nematollah Niamoradi
    Nonlinear Studies, 2013
59. "Numerical behavior of a fractional fifth order dissipative system of magnetoconvection"
    محمد جاويدي, Nematollah Niamoradi
    APPLIED MATHEMATICAL MODELLING, 2013
60. "Multiplicity results for a class of fractional boundary value problems"
    Nematollah Niamoradi
    Annales Polonici Mathematici, 2013
61. "Sliding Mode Control of Uncertain Unified Chaotic Fractional-Order New Lorenz-Like System"
    Nematollah Niamoradi, محمد جاويدي
    DYNAMICS OF CONTINUOUS DISCRETE AND IMPULSIVE SYSTEMS-SERIES B-APPLICATIONS and ALGORITHMS, 2013
62. "Positive Solutions for Multi-Point Boundary Value Problems for Nanlinear Fractional Differential Equations"
    Nematollah Niamoradi
    Journal of Contemporary Mathematical Analysis-Armenian Academy of Sciences, 2013
63. "Dynamic Analysis of a Fractional-Order Rikitake System"
    Nematollah Niamoradi, محمد جاويدي
    DYNAMICS OF CONTINUOUS DISCRETE AND IMPULSIVE SYSTEMS-SERIES B-APPLICATIONS and ALGORITHMS, 2013
64. "Existence of three solutions for Kirchhoff nonlocal operators of elliptic type"
    Nematollah Niamoradi
    Mathematical Communications, 2013
65. "Dynamic analysis of a fractional order Prey - Predator interaction with harvesting"
    محمد جاويدي, Nematollah Niamoradi
    APPLIED MATHEMATICAL MODELLING, 2013
66. "The Nehari Manifold and its Application to a Fractional Boundary Value Problem"
    Nematollah Niamoradi
    Differential Equations and Dynamical Systems, 2013
67. "Multiplicity of Positive Solutions to Weighted nonlinear elliptic system involving critical exponents"
    Nematollah Niamoradi
    Science China-Mathematics, 2013
68. "Allee effects in a predator-prey system with a saturated recovery function and harvesting"
    محمد جاويدي, Nematollah Niamoradi
    International Journal of Advanced Mathematical Sciences, 2013
69. "The Nehari Manifold and Application to a quasi-linear Elliptic Equation With Multiple Hardy-type Terms"
    Nematollah Niamoradi, Mohsen Shekarbaigie, عباس رزلا نسري, i y
    Journal of Partial Differential Equations, 2013
70. "A variational approach to a singular elliptic system involving critical Sobolev-Hardy exponents and concave-convex nonlinearities"
    Nematollah Niamoradi
    MATHEMATICAL SOCIAL SCIENCES, 2013
71. "Existence of positive solutions for fractional differential systems with multi point boundary conditions"
    Nematollah Niamoradi, TAHEREH BASHIRI
    ANNALI DELL UNIVERSITA DI FERRARA SEZIONE MUSEIOLGIA SCIENTIFICA E NATURALISTICA, 2013
72. "Numerical solution of telegraph equation by using LT inversion technique"
    محمد جاويدي, Nematollah Niamoradi
    International Journal of Advanced Mathematical Sciences, 2013
73. "Infinitely many solutions for a perturbed nonlinear fractional boundary value problems depending on two parameters"
    Nematollah Niamoradi, .Y Zhou
    European Physical Journal-Special Topics, 2013
74. "Existence of Multiple Positive Solutions for Quasilinear Elliptic Systems Involving Critical Hardy Sobolev Exponents and Sign-Changing Weight Function"
    Nematollah Niamoradi
    Mathematical Modelling and Analysis, 2012
75. "Multiple Positive Solutions for Fractional Differential Systems with Two Parameters"
    Nematollah Niamoradi
    Journal of Advanced Research in Applied Mathematics, 2012
76. "Existence Of Positive Solutions For Third-order Boundary Value Problems"
    Nematollah Niamoradi
    JOURNAL OF MATHEMATICS AND COMPUTER SCIENCE-JMCS, pp.8-18, 2012
77. "A SIX - POINT NONLOCAL INTEGRAL BOUNDARY VALUE PROBLEM FOR FRACTIONAL DIFFERENTIAL EQUATIONS"
    Nematollah Niamoradi
    INDIAN JOURNAL OF PURE and APPLIED MATHEMATICS, 2012
78. "Existence of multiple positive solutions for fractional differential inclusions with m-point boundary conditions and two fractional orders"
    Nematollah Niamoradi, محمد جاويدي
    Electronic Journal of Differential Equations, 2012
79. "A Spectral Collocation Method Based on Chebyshev Polynomials for the Generalized Zakharov Equation"
    محمد جاويدي, Nematollah Niamoradi
    DYNAMICS OF CONTINUOUS DISCRETE AND IMPULSIVE SYSTEMS-SERIES B-APPLICATIONS and ALGORITHMS, 2012
80. "Existence Results of Positive Solutions to Boundary Value Problem for Fractional Differential Equation"
    Nematollah Niamoradi
    Journal of Advanced Research in Dynamical and Control Systems, 2012
81. "Existence of positive solutions for a singular problems of caffarelli-kohn-nirenberg-lin type"
    Nematollah Niamoradi
    differential equations applications, 2012
82. "EXISTENCE OF SOLUTIONS TO QUASILINEAR ELLIPTIC SYSTEMS WITH COMBINED CRITICAL SOBOLEV - HARDY TERMS"
    Nematollah Niamoradi, محمد جاويدي
    Electronic Journal of Differential Equations, 2012
83. "Existence and multiplicity of solutions to a singular elliptic system with critical Sobolev Hardy exponents and concave convex nonlinearities"
    Nematollah Niamoradi
    JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS, 2012
84. "On a p-Laplacian system with critical Hardy Sobolev exponents and critical Sobolev exponents"
    Nematollah Niamoradi
    Ukrainian Mathematical Journal, 2012
85. "Qualitative and bifurcation analysis using a computer virus model with a saturated recovery function"
    Nematollah Niamoradi, محمد جاويدي
    Journal of Applied Analysis and Computation, 2012
86. "positive solutions for fractional differential equations with p-laolaclan"
    Nematollah Niamoradi, محمد جاويدي
    Journal of Nonlinear Analysis and Optimization Theory Applications, 2012
87. "Existence of three positive solutions for a system of nonlinear third-order ordinary differential equations"
    Nematollah Niamoradi
    Electronic Journal of Differential Equations, 2011
88. "positive solutions for systems of third- order generalized sturm- liouville boundary- value problems with (p q) - laplacian"
    Nematollah Niamoradi
    Electronic Journal of Differential Equations, 2011
89. "positive solutions for third- order generalized sturm- liouville boundary- value problems with p - laplacian"
    Nematollah Niamoradi
    Journal of advanced research in differential equations, 2011
90. "The Nehari manifold for a Navier boundary calue problem involving the p-bihamonic"
    Nematollah Niamoradi
    Iranian Journal of Science and Technology Transaction A-Science, 2011
91. "The number of limit cycles of a quintic polynomial system"
    Nematollah Niamoradi, h z, Ali Atabeigi
    COMPUTERS and MATHEMATICS WITH APPLICATIONS, 2009
92. "The number of limit cycles of a quintic polynomial system with center"
    a a, Nematollah Niamoradi, h z
    NONLINEAR ANALYSIS-THEORY METHODS and APPLICATIONS, 2009
93. "The number of limit cycles of a quintic Hamiltonian system with perturbation"
    Nematollah Niamoradi, Ali Atabeigi, h z
    BALKAN JOURNAL OF GEOMETRY AND ITS APPLICATIONS, 2008
94. "وجود جوابهای یک معادله دیفرانسیل کسری جدید ح-لاپلاسین با اثر ضربهای"
    نعمت اله نیامرادی، عبدالرحمن رازانی
    پژوهش های نوین در ریاضی (علوم پایه سابق)، صفحات:117-128، 1397
95. "On Quasilinear Elliptic Systems Involving Multiple Critical Exponents(سقف کامل)"
    نعمت اله نیامرادی، محسن شکربیگی
    International Journal of Mathematical Modelling Computations، 1391
96. "Multiple positive solutions for nonlinear fractional differential systems(سقف کامل)"
    نعمت اله نیامرادی، طاهره بشیری
    Fractional differential calculus، 1390
97. "(سقف کامل)Existence of positive solutions for third-order boundary value problems"
    نعمت اله نیامرادی
    the journal of mathematics and computer science، 1390
98. "Existence of positive solutions for fourth-order boundary value problems with three- point boundary conditions(سقف کامل)"
    نعمت اله نیامرادی
    Caspian Journal of Enviromental Sciences، 1390
99. "Existence of solutions for multi point boundary value problems for fractional differential equations (سقف کامل)"
    نعمت اله نیامرادی
    Arab Journal of Mathematical Sciences، 1390
100. "(سقف کامل)Multiple positive solutions for fractional differential systems"
     نعمت اله نیامرادی
     ANNALI DELL UNIVERSITA DI FERRARA SEZIONE MUSEIOLGIA SCIENTIFICA E NATURALISTICA، 1390

مقالات علمی ارائه شده در همایش ها

1. "Existence of Posituve Solutions for Third-Order Boundary Value Problems"
   Nematollah Niamoradi
   the 23rd international conference on operator theory,
2. "Existence of Positive Solution for Fractional Differential Equations"
   Nematollah Niamoradi
   ICAAA 2012,
3. "Existence of Solutions for Fractional Differential Equations by Oprator Theory"
   طاهره حقي, Nematollah Niamoradi, k gh
   1th Seminar on Operator Theory and,
4. "Existence of Two Positive Solutions for Quasilinear Elliptic Systems Involving Critical Hardy - Sobolev Exponents"
   Mohsen Shekarbaigie, Nematollah Niamoradi
   SOTA,
5. "Some results of Positive Solutions for fractional differential equations whith P -Laplacian"
   Nematollah Niamoradi, TAHEREH BASHIRI
   The 43th Annual Iranian Mathematics Conference,
6. "Existence of Three Solutions for a Class of Fractional Boundary Value Problems"
   Nematollah Niamoradi
   CAIM 2011,
7. "On a P-laplace System Involving Multiple Critical Exponents"
   Nematollah Niamoradi
   International Conference on Diferential Diference Equations and Applications,
8. "Linear Estimate of the Number of Zeros of Abelian Integrals for a Kind of Quintic Hamiltonians"
   نعمت اله نیامرادی، حمیدرضا زنگنه
   هشتمین سمینار معادلات دیفرانسیل، سیستمهای دینامیکی و کاربردهای آن،
9. "مساله شانزدهم هیلبرت و فرم ضعیف شده آن"
   نعمت اله نیامرادی
   اولین همایش علمی سالانه دانشگاه رازی،
10. "Positive Solutions for System of Third - Order Generalized Sturm-Liouville Boundary Value Problems with (P Q) - Laplacian"
    نعمت اله نیامرادی
    نوزدهمین سمینار آنالیز ریاضی و کاربردهای ان،
11. "Positive Solutions for Fractional Differential Equations with P- Laplacian"
    نعمت اله نیامرادی، ناهید جمشیدی
    بیستمین سمینار آنالیز ریاضی و کاربردهای آن،