Items where Author is "Leong, Wah June"

Yap, Chee Kong and Chew, Weiyun and Al-Mutairi, Khalid Awadh and Nulit, Rosimah and Ibrahim, Mohd. Hafiz and Wong, Koe Wei and Bakhtiari, Alireza Riyahi and Sharifinia, Moslem and Ismail, Mohamad Saupi and Leong, Wah June and Tan, Wen Siang and Cheng, Wan Hee and Okamura, Hideo and You, Chen Feng and Al-Shami, Salman Abdo (2022) Assessments of the ecological and health risks of potentially toxic metals in the topsoils of different land uses: a case study in Peninsular Malaysia. Biology, 11 (1). art. no. 2. pp. 1-26. ISSN 2079-7737

Muhafzan and Zulakmal and Yulanda Mardiana Putri and Leong, Wah June (2022) Minimum energy control of fractional-order differential-algebraic system. Cybernetics and Physics, 11 (3). 151 - 156. ISSN 2223-7038; ESSN: 2226-4116

Lim, Yue Yuin and Kek, Sie Long and Leong, Wah June (2022) Stochastic optimal control of economic growth model under research and development investment with Kalman filtering approaches. Journal of Hunan University (Natural Sciences), 49 (6). 120 - 128. ISSN 1674-2974

Baba, Ishaq Abdullahi and Midi, Habshah and Leong, Wah June and Ibragimov, Gafurjan I. (2021) Penalized LAD-SCAD estimator based on robust wrapped correlation screening method for high dimensional models. Pertanika Journal of Science & Technology, 29 (2). pp. 1053-1070. ISSN 0128-7680; ESSN: 2231-8526

Abedi, Fakhreddin and Leong, Wah June and Shahemabadi, Ali Rafiei (2021) Exponential stability of some interconnected stochastic control systems with non-trivial equilibria. European Journal of Control, 58. 174 - 182. ISSN 0947-3580

Ab Rashid, Nur Shafiqah and Abd Rahmin, Nor Aliza and Mohamed Ali, Nazihah and Leong, Wah June (2020) Improved estimation of surgery duration using exponential distribution for the elective surgery scheduling problem. Advances in Mathematics: Scientific Journal, 9 (12). 10929 - 10938. ISSN 1857-8365; ESSN: 1857-8438

Yow, Kai Siong and Chen, Chuei Yee and Leong, Wah June and Ismail, Fudziah (2019) Discovering factors of graph polynomials. Discovering Mathematics, 41 (2). pp. 88-95. ISSN 2231-7023

Sim, Hong Seng and Leong, Wah June and Chen, Chuei Yee (2019) Gradient method with multiple damping for large-scale unconstrained optimization. Optimization Letters, 13 (3). pp. 617-632. ISSN 1862-4472; ESSN: 1862-4480

Leong, Wah June and Sie, Long Kek and Teo, Kok Lay and Sim, Sy Yi (2018) Application of conjugate gradient approach for nonlinear optimal control problem with model-reality differences. Applied Mathematics, 9. 940 - 953. ISSN 2152-7393

Kek, Sie Long and Sim, Sy Yi and Leong, Wah June and Teo, Kok Lay (2018) Discrete-time nonlinear stochastic optimal control problem based on stochastic approximation approach. Advances in Pure Mathematics, 8 (3). 232 - 244. ISSN 2160-0368; ESSN: 2160-0384

Yap, Chui Ying and Leong, Wah June (2018) Efficient ODE-based methods for unconstrained optimization. Discovering Mathematics, 40 (1). 31 - 45. ISSN 2231-7023

Abedi, Fakhreddin and Leong, Wah June (2017) Stabilization of some composite stochastic control systems with nontrivial solutions. European Journal of Control, 38. pp. 16-21. ISSN 0947-3580; ESSN: 1435-5671

Hong, Seng Sim and Leong, Wah June and Chen, Chuei Yee and Ibrahim, Siti Nur Iqmal (2017) Multi-spectral gradient method via variational technique under log-determinant norm for large-scale optimization. Discovering Mathematics (Menemui Matematik), 39 (1). 22 - 29. ISSN 2231-7023

Sie, Long Kek and Jiao, Li and Leong, Wah June and Abd Aziz, Mohd Ismail (2017) A gauss-newton approach for nonlinear optimal control problem with model-reality differences. Open Journal of Optimization, 6. 85 - 100. ISSN 2325-7105; ESSN: 2325-7091

Ghanbari, Shamsollah and Othman, Mohamed and Abu Bakar, Mohd Rizam and Leong, Wah June (2016) Multi-objective method for divisible load scheduling in multi-level tree network. Future Generation Computer Systems, 54. pp. 132-143. ISSN 0167-739X; ESSN: 1872-7115

Enshaei, Sharareh and Leong, Wah June and Farid, Mahboubeh (2016) Diagonal quasi-Newton method via variational principle under generalized Frobenius norm. Optimization Methods and Software, 31 (6). pp. 1258-1271. ISSN 1055-6788; ESSN: 1029-4937

Moyi, Aliyu Usman and Leong, Wah June (2016) Sufficient descent three term conjugate gradient method via symmetric rank-one update for large-scale optimization. Optimization, 65 (1). pp. 121-143. ISSN 0233-1934; ESSN: 1029-4945

Abdul-Zahra, Inam and Abbas, Iraq Tereq and Kalaf, Bayda Atiya and Abu Bakar, Mohd Rizam and Leong, Wah June and Monsi, Mansor (2016) The role of dynamic programming in the distribution of investment allocations between production lines with an application. International Journal of Pure and Applied Mathematics, 106 (2). pp. 365-380. ISSN 1311-8080; ESSN: 1314-3395

Arzuka, Ibrahim and Abu Bakar, Mohd Rizam and Leong, Wah June (2016) A scaled three-term conjugate gradient method for unconstrained optimization. Journal of Inequalities and Applications, 2016. art. no. 325. pp. 1-16. ISSN 1025-5834; ESSN: 1029-242X

Moyi, Aliyu Usman and Leong, Wah June (2016) A three-term conjugate gradient method with nonmonotone line search for unconstrained optimization. Pacific Journal of Optimization, 12 (3). pp. 587-601. ISSN 1348-9151

Leong, Wah June (2015) A class of diagonal quasi-newton methods for large-scale convex minimization. Bulletin of the Malaysian Mathematical Sciences Society. pp. 1-14. ISSN 0126-6705

Sim, Hong Seng and Leong, Wah June and Chen, Chuei Yee and Ibrahim, Siti Nur Iqmal (2015) Diagonal quasi-Newton updating formula using log-determinant norm. In: 23rd Malaysian National Symposium of Mathematical Sciences (SKSM23), 24-26 Nov. 2015, Johor Bahru, Malaysia. (pp. 1-7).

Sim, Hong Seng and Leong, Wah June and Chen, Chuei Yee and Ibrahim, Siti Nur Iqmal (2015) Diagonal quasi-Newton updating formula via variational principle under the log-determinant measure. In: International Conference on Control, Optimization and Autonomous Vehicles 2015 (COAV2015), 30-31 July 2015, Putrajaya, Malaysia. (p. 21).

Abedi, Fakhreddin and Leong, Wah June and Abedi, Mohammad (2015) Lyapunov characterization for the stability of stochastic control systems. Mathematical Problems in Engineering, 2015. art. no. 584935. pp. 1-7. ISSN 1024-123X; ESSN: 1563-5147

Ghanbari, Shamsollah and Othman, Mohamed and Abu Bakar, Mohd Rizam and Leong, Wah June (2015) Priority-based divisible load scheduling using analytical hierarchy process. Applied Mathematics & Information Sciences, 9 (5). pp. 2541-2552. ISSN 1935-0090; ESSN: 2325-0399

Nasab, Aliasghar Kazemi and Kilicman, Adem and Atabakan, Z. Pashazadeh and Leong, Wah June (2015) A numerical approach for solving singular nonlinear LaneEmden type equations arising in astrophysics. New Astronomy, 34. pp. 178-186. ISSN 1384-1076

Heydar, Maryam and Abu Bakar, Mohd Rizam and Mansourirad, Ehsanollah and Leong, Wah June and Senu, Norazak (2014) An efficiency evaluation problem including fuzzy weights. Malaysian Journal of Mathematical Sciences, 8 (S). pp. 61-70. ISSN 1823-8343; ESSN: 2289-750X

Khiyabani, Farzin Modarres and Leong, Wah June (2014) Quasi-Newton methods based on ordinary differential equation approach for unconstrained nonlinear optimization. Applied Mathematics and Computation, 233. pp. 272-291. ISSN 0096-3003; ESSN: 1873-5649

Ibrahim, Mohd Asrul Hery and Mamat, Mustafa and Leong, Wah June (2014) BFGS method: a new search direction. Sains Malaysiana, 43 (10). pp. 1591-1597. ISSN 0026-6039

Ng, Choong Boon and Leong, Wah June and Monsi, Mansor (2014) Diagonal preconditioned conjugate gradient algorithm for unconstrained optimization. Pertanika Journal of Science & Technology, 22 (1). pp. 213-224. ISSN 0128-7680; ESSN: 2231-8526

Kilicman, Adem and Leong, Wah June and Eshkuvatov, Zainidin K. (2014) International conference on mathematical sciences and statistics 2013: selected papers. Springer-Verlag, Singapore. ISBN 9789814585323; EISBN: 9789814585330

Khiyabani, Farzin Modarres and Leong, Wah June (2014) Limited memory methods with improved symmetric rank-one updates and its applications on nonlinear image restoration. Arabian Journal for Science and Engineering, 39 (11). pp. 7823-7838. ISSN 1319-8025; ESSN: 1319-8025

Sim, Hong Seng and Leong, Wah June and Abu Hassan, Malik and Ismail, Fudziah (2014) Preconditioned subspace quasi-newton method for large scale optimization. Pertanika Journal of Science & Technology, 22 (1). pp. 175-192. ISSN 0128-7680; ESSN: 2231-8526

Ibrahim, Mohd Asrul Hery and Mamat, Mustafa and Leong, Wah June and Mohammad Sofi, Azfi Zaidi (2014) The algorithms of Broyden-CG for unconstrained optimization problems. International Journal of Mathematical Analysis, 8 (52). pp. 2591-2600. ISSN 1312-8876; ESSN: 1314-7579

Ibrahim, Mohd Asrul Hery and Mamat, Mustafa and Leong, Wah June (2014) The hybrid BFGS-CG method in solving unconstrained optimization problems. Abstract and Applied Analysis, 2014. art. no. 507102. pp. 1-6. ISSN 1085-3375; ESSN: 1687-0409

Abedi, Fakhreddin and Leong, Wah June and Chaharborj, Sarkhosh Seddighi (2013) A notion of stability in probability of stochastic nonlinear systems. Advances in Difference Equations, 2013. art. no. 363. pp. 1-8. ISSN 1687-1839; ESSN: 1687-1847

Leong, Wah June and Goh, Bean San (2013) Convergence and stability of line search methods for unconstrained optimization. Acta Applicandae Mathematicae, 127 (1). pp. 155-167. ISSN 0167-8019; ESSN:1572-9036

Sim, Hong Seng and Leong, Wah June and Abu Hassan, Malik and Ismail, Fudziah (2013) Some diagonal preconditioners for limited memory quasi-Newton method for large Scale optimization. Malaysian Journal of Mathematical Sciences, 7 (2). pp. 181-201. ISSN 1823-8343; ESSN: 2289-750X

Ibrahim, Mohd Asrul Hery and Mamat, Mustafa and Leong, Wah June and Mohammad Sofi, Azfi Zaidi (2013) The CG-BFGS method for unconstrained optimization problems. In: 21st National Symposium on Mathematical Sciences (SKSM21), 6-8 Nov. 2013, Penang, Malaysia. (pp. 167-172).

Marjugi, Siti Mahani and Leong, Wah June (2013) Diagonal hessian approximation for limited memory quasi-newton via variational principle. Journal of Applied Mathematics, 2013. art. no. 523476. pp. 1-8. ISSN 1110-757X; ESSN: 1687-0042

Abedi, Fakhreddin and Leong, Wah June (2013) Dynamic robust stabilization of stochastic differential control systems. IMA Journal of Mathematical Control and Information, 30 (4). pp. 559-569. ISSN 0265-0754; ESSN: 1471-6887

Abedi, Fakhreddin and Leong, Wah June and Chaharborj, Sarkhosh Seddighi (2013) Exponential input-to-state stability of composite stochastic systems. Advances in Difference Equations, 2013. art. no. 208. pp. 1-10. ISSN 1687-1839; ESSN: 1687-1847

Ghanbari, Shamsollah and Othman, Mohamed and Leong, Wah June and Abu Bakar, Mohd Rizam (2013) Multi-criteria based algorithm for scheduling divisible load. In: First International Conference on Advanced Data and Information Engineering (DaEng-2013), 16-18 Dec. 2013, Kuala Lumpur, Malaysia. (pp. 547-554).

Abedi, Fakhreddin and Leong, Wah June (2013) On exponential stability of composite stochastic control systems. Abstract and Applied Analysis, 2013. art. no. 695816. pp. 1-7. ISSN 1085-3375; ESSN: 1687-0409

Abedi, Fakhreddin and Leong, Wah June and Chaharborj, Sarkhosh Seddighi (2013) On the asymptotical and practical stability of stochastic control systems. Mathematical Problems in Engineering, 2013 (560647). pp. 1-10. ISSN 1024-123X

Goh, Bean San and Leong, Wah June and Siri, Zailan (2013) Partial Newton methods for a system of equations. Numerical Algebra, Control and Optimization, 3 (3). pp. 463-469. ISSN 2155-3289; ESSN: 2155-3297

Sim, Hong Seng and Leong, Wah June and Ismail, Fudziah (2013) Preconditioning on subspace quasi-Newton method for large scale unconstrained optimization. In: Statistics and Operational Research International Conference (SORIC 2013), 3–5 Dec. 2013, Sarawak, Malaysia. (pp. 297-305).

Farid, Mahboubeh and Leong, Wah June and Malekmohammadi, Najmeh and Mamat, Mustafa (2013) Scaled diagonal gradient-type method with extra update for large-scale unconstrained optimization. Abstract and Applied Analysis, 2013. art. no. 532041. pp. 1-5. ISSN 1085-3375; ESSN: 1687-0409

Yusuf, Mohammed Waziri and Leong, Wah June and Mamat, Mustafa and Moyi, Aliyu Usman (2013) Two-step derivative-free diagonally Newton's method for large-scale nonlinear equations. World Applied Sciences Journal, 21. pp. 86-94. ISSN 1818-4952; ESSN: 1991-6426

Leong, Wah June and Chen, Chuei Yee (2013) A class of diagonal preconditioners for limited memory BFGS method. Optimization Methods and Software, 28 (2). pp. 379-392. ISSN 1055-6788; ESSN: 1029-4937

Farid, Mahboubeh and Leong, Wah June and Zheng, Lihong (2013) A new diagonal gradient-type method for large scale unconstrained optimization. UPB Scientific Bulletin, Series A: Applied Mathematics and Physics, 75 (1). pp. 57-64. ISSN 1223-7027

Moyi, Aliyu Usman and Leong, Wah June (2013) A new inexact line search method for convex optimization problems. In: 2013 International Conference on Applied Mathematics and Computational Methods (AMCM 2013), 28-30 Sept. 2013, Venice, Italy. (pp. 59-61).

Varnamkhasti, Mohammad Jalali and Lee, Lai Soon and Abu Bakar, Mohd Rizam and Leong, Wah June (2012) A genetic algorithm with fuzzy crossover operator and probability. Advances in Operations Research, 2012 (956498). pp. 1-16. ISSN 1687-9147; ESSN: 1687-9155

Leong, Wah June and Abu Hassan, Malik (2011) Scaled memoryless symmetric rank one method for large-scale optimization. Applied Mathematics and Computation, 218 (2). pp. 413-418. ISSN 0096-3003

Leong, Wah June and Abu Hassan, Malik and Yusuf, Muhammad Waziri (2011) A matrix-free quasi-Newton method for solving large-scale nonlinear systems. Computers and Mathematics with Applications, 62 (5). pp. 2354-2363. ISSN 0898-1221

Modarres, Farzin and Abu Hassan, Malik and Leong, Wah June (2011) A symmetric rank-one method based on extra updating techniques for unconstrained optimization. Computers and Mathematics with Applications, 62 (1). pp. 392-400. ISSN 0898-1221

Leong, Wah June and Abu Hassan, Malik (2011) A new gradient method via least change secant update. International Journal of Computer Mathematics, 88 (4). pp. 816-828. ISSN 0020-7160; ESSN: 1029-0265

Biglari, Fahmeh and Abu Hassan, Malik and Leong, Wah June (2011) New quasi-Newton methods via higher order tensor models. Journal of Computational and Applied Mathematics, 235 (8). pp. 2412-2422. ISSN 0377-0427

Modarres, Farzin and Abu Hassan, Malik and Leong, Wah June (2011) Improved Hessian approximations with modified secant equations for symmetric rank-one method. Journal of Computational and Applied Mathematics, 235 (8). pp. 2423-2431. ISSN 0377-0427; ESSN: 1879-1778

Yusuf, Mohammed Waziri and Leong, Wah June and Abu Hassan, Malik (2011) Jacobian-free diagonal Newton's method for solving nonlinear systems with singular Jacobian. Malaysian Journal of Mathematical Sciences, 5 (2). pp. 241-255. ISSN 1823-8343

Leong, Wah June and Abu Hassan, Malik (2011) Positive-definite memoryless symmetric rank one method for large-scale unconstrained optimization. Pacific Journal of Optimization, 7 (1). pp. 29-41. ISSN 1348-9151; ESSN: 1349-8169

Modarres, Farzin and Abu Hassan, Malik and Leong, Wah June (2011) Structured symmetric rank-one method for unconstrained optimization. International Journal of Computer Mathematics, 88 (12). pp. 2608-2617. ISSN 0020-7160; ESSN: 1029-0265

Waziri, Mohammed Yusuf and Leong, Wah June and Abu Hassan, Malik and Monsi, Mansor (2011) Two-step diagonal Newton method for large-scale systems of nonlinear equations. In: 4th International Conference on Modeling, Simulation and Applied Optimization (ICMSAO 2011), 19-21 Apr. 2011, Kuala Lumpur, Malaysia. .

Khalaf, Wakas S. and Leong, Wah June and Abu Bakar, Mohd Rizam and Lee, Lai Soon (2011) A comparative study on time-cost trade-off approaches within critical path method. Journal of Applied Sciences, 11 (6). pp. 920-931. ISSN 1812-5654; ESSN: 1812-5662

Farid, Mahboubeh and Leong, Wah June (2011) An improved multi-step gradient-type method for large scale optimization. Computers and Mathematics with Applications, 61 (11). pp. 3312-3318. ISSN 0898-1221; ESSN: 1873-7668

Yusuf, Muhammad Waziri and Leong, Wah June and Abu Hassan, Malik and Monsi, Mansor (2011) A low memory solver for integral equations of Chandrasekhar type in the radiative transfer problems. Mathematical Problems in Engineering, 2011 (467017). pp. 1-12. ISSN 1024-123X; ESSN: 1563-5147

Yusuf, Mohammed Waziri and Leong, Wah June and Abu Hassan, Malik and Monsi, Mansor (2010) A new Newtons method with diagonal Jacobian approximation for systems of nonlinear equations. Journal of Mathematics and Statistics, 6 (3). pp. 246-252. ISSN 1549-3644; ESSN: 1558-6359

Yusuf, Mohammed Waziri and Leong, Wah June and Abu Hassan, Malik and Monsi, Mansor (2010) Newton method for nonlinear system with singular Jacobian using diagonal updating. International Journal of Mathematics and Computations, 8 (S10). pp. 1-8. ISSN 0974-5718; ESSN: 0974-570X

Khiyabani, Farzin Modarres and Abu Hassan, Malik and Leong, Wah June (2010) Convergence of symmetric rank-one method based on modified Quasi-Newton equation. Journal of Mathematics Research, 2 (3). pp. 97-102. ISSN 1916-9795; ESSN: 1916-9809

Farid, Mahboubeh and Leong, Wah June and Abu Hassan, Malik (2010) A new two-step gradient-type method for large-scale unconstrained optimization. Computers and Mathematics with Applications, 59 (10). pp. 3301-3307. ISSN 0898-1221; ESSN: 1873-7668

Shabanzadeh, Parvaneh and Abu Hassan, Malik and Leong, Wah June (2010) A derivative-free optimization method for solving classification problem. Journal of Computer Science, 6 (3). pp. 369-373. ISSN 1549-3636; ESSN: 1552-6607

Leong, Wah June and Farid, Mahboubeh and Abu Hassan, Malik (2010) Improved Hessian approximation with modified quasi-Cauchy relation for a gradient-type method. Advance Modeling and Optimization, 12 (1). pp. 37-44. ISSN 1841-4311

Yusuf, Mohammed Waziri and Leong, Wah June and Abu Hassan, Malik and Monsi, Mansor (2010) Jacobian computation-free Newton's method for systems of nonlinear equations. Journal of Numerical Mathematics and Stochastics, 2 (1). pp. 54-63. ISSN 2151-2302

Shabanzadeh, Parvaneh and Abu Hassan, Malik and Leong, Wah June and Mohagheghtabar, Maryam (2010) Using Pattern Search Methods for Minimizing Clustering Problems. World Academy of Science, Engineering and Technology, 62 (February). pp. 158-162. ISSN 1307-6892

Abedi, Fakhreddin and Abu Hassan, Malik and Leong, Wah June (2010) A characterization of maximal Lyapunov function for stability of a nonlinear system. Advances in Theoretical and Applied Mathematics, 5 (2). pp. 237-246. ISSN 0973-4554; ESSN: 0974-0236

Waziri, Mohammed Yusuf and Leong, Wah June and Abu Hassan, Malik and Monsi, Mansor (2010) An efficient solver for systems of nonlinear equations with singular Jacobian via diagonal updating. Applied Mathematical Sciences, 4 (69-72). pp. 3403-3412. ISSN 1312-885X; ESSN: 1314-7552

Leong, Wah June and Abu Hassan, Malik (2010) A family of least change diagonally quasi-Newton methods for nonlinear equations. In: The 8th International Conference on Optimization: Techniques and Applications (ICOTA 8), 10-13 Dec. 2010, Shanghai, China. (pp. 315-316).

Khalaf, Wakas S. and Leong, Wah June and Lee, Lai Soon and Abu Bakar, Mohd Rizam (2010) A linear programming approach to maximize savings by stretching noncritical activities. Australian Journal of Basic and Applied Sciences, 4 (11). pp. 5649-5657. ISSN 1991-8178

Leong, Wah June and Abu Hassan, Malik and Farid, Mahboubeh (2010) A monotone gradient method via weak secant equation for unconstrained optimization. Taiwanese Journal of Mathematics, 14 (2). pp. 413-423. ISSN 1027-5487; ESSN: 2224-6851

Abu Hassan, Malik and Leong, Wah June and Farid, Mahboubeh (2009) A new gradient method via quasi-Cauchy relation which guarantees descent. Journal of Computational and Applied Mathematics, 230 (1). pp. 300-305. ISSN 0377-0427; ESSN: 1879-1778

Leong, Wah June and Abu Hassan, Malik (2009) Convergence of a positive definite symmetric rank one method with restart. Advance Modeling and Optimization, 11 (4). pp. 423-433. ISSN 1841-4311

Modarres, Farzin and Abu Hassan, Malik and Leong, Wah June (2009) Memoryless modified symmetric rank-one method for large-scale unconstrained optimization. American Journal of Applied Sciences, 6 (12). pp. 2054-2059. ISSN 1546-9239; ESSN: 1554-3641

Khiyabani, Farzin Modarres and Abu Hassan, Malik and Leong, Wah June (2009) Memoryless symmetric rank-one method based on modified secant equation for large-scale unconstrained optimization. In: Fundamental Science Congress 2009 (FSC 2009), 17-18 June 2009, Auditorium Jurutera, Fakulti Kejuruteraan, Universiti Putra Malaysia. (pp. 374-375).

Modarres, Farzin and Abu Hassan, Malik and Leong, Wah June (2009) Multi-steps symmetric rank-one update for unconstrained optimization. World Applied Sciences Journal, 7 (5). pp. 610-615. ISSN 1818-4952; ESSN: 1991-6426

Leong, Wah June and Abu Hassan, Malik (2009) Scaled memoryless BFGS preconditioned steepest descent method for very large-scale unconstrained optimization. Journal of Information and Optimization Sciences, 30 (2). pp. 387-396. ISSN 0252-2667; ESSN: 2169-0103

Leong, Wah June and Chen, Chuei Yee (2009) A class of diagonally preconditioned limited memory BFGS method for large scale unconstrained optimization. In: Fundamental Science Congress 2009 (FSC 2009), 17-18 June 2009, Auditorium Jurutera, Fakulti Kejuruteraan, Universiti Putra Malaysia. (pp. 364-365).

Shabanzadeh, Parvaneh and Abu Hasan, Malik and Leong, Wah June (2009) A nonsmooth optimization method for clustering problem. In: Fundamental Science Congress 2009 (FSC 2009), 17-18 June 2009, Auditorium Jurutera, Fakulti Kejuruteraan, Universiti Putra Malaysia. (pp. 425-426).

Abedi, Fakhreddin and Abu Hassan, Malik and Leong, Wah June (2009) A remark on the uniqueness of solutions for a perturbed system using the Zubov method. In: Fundamental Science Congress 2009 (FSC 2009), 17-18 June 2009, Auditorium Jurutera, Fakulti Kejuruteraan, Universiti Putra Malaysia. (pp. 372-373).

Leong, Wah June and Abu Hassan, Malik (2009) A restarting approach on symmetric rank one update for unconstrained optimization. Computational Optimization and Applications, 42 (3). pp. 327-334. ISSN 0926-6003; ESSN: 1573-2894

Leong, Wah June and Abu Hassan, Malik (2008) Scaled memoryless symmetric rank one method for large-scale unconstrained optimization. In: 4th Sino-Japanese Optimization Meeting (SJOM 2008), 27-31 Aug. 2008, Tainan, Taiwan. (pp. 1-10).

Leong, Wah June and Abu Hassan, Malik (2008) Predicting minimum energy structure of a peptide via a modified potential smoothing kernel. Malaysian Journal of Mathematical Sciences, 2 (2). pp. 29-39. ISSN 1823-8343; ESSN: 2289-750X

Toaha, Syamsuddin and Abu Hassan, Malik and Ismail, Fudziah and Leong, Wah June (2008) Stability analysis and maximum profit of predator - prey population model with time delay and constant effort of harvesting. Malaysian Journal of Mathematical Sciences, 2 (2). pp. 147-159. ISSN 1823-8343; ESSN: 2289-750X

Leong, Wah June and Ibragimov, Gafurjan (2008) A multiperson pursuit problem on a closed convex set in Hilbert space. Far East Journal of Applied Mathematics, 33 (2). pp. 205-214. ISSN 0972-0960

Leong, Wah June (2007) A new stepsize for gradient method via weak secant equation. In: The 7th International Conference on Optimization : Techniques and Applications (ICOTA7), 12-15 Dec. 2007, Kobe, Japan. . (Unpublished)

Leong, Wah June (2003) Modified Quasi-Newton Methods For Large-Scale Unconstrained Optimization. PhD thesis, Universiti Putra Malaysia.

Abu Hassan, Malik and Monsi, Mansor and Leong, Wah June (2002) Convergence of the Steepest Descent Method for Minimizing Convex Functions. Pertanika Journal of Science & Technology, 10 (2). pp. 145-152. ISSN 0128-7680

Leong, Wah June (1999) On the Modifications of a Broyden's Single Parameter Rank-Two Quasi-Newton Method for Unconstrained Minimization. Masters thesis, Universiti Putra Malaysia.

Abu Hassan, Malik and Monsi, Mansor and Leong, Wah June (1999) A Switching Criterion in Hybrid Quasi-Newton BFGS - Steepest Descent Direction. Pertanika Journal of Science & Technology, 7 (2). pp. 111-123. ISSN 0128-7680