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| 1 | Simulation of the screening process on a circularly vibrating screen using 3D-DEM显示文摘A numerical study of the motion particulates follow along a circularly vibrating screen deck was done using the three dimensional Discrete Element Method (DEM). The motion of the particles was analyzed. The effects of vibration amplitude, throwing index, and screen deck inclination angle on the screening process are discussed. The results show that the average velocity of the particles increases along the lon- gitudinal direction of the deck. The screening efficiency is highest when the vibration amplitude, throw- ing index, and screen deck inclination angle are 3-3.5 mm, 2.7 and 15°, respectively. This work is helpful for developing a deep understanding of particle motion and for optimizing screen separator designs. | Zhao Lala Zhao Yuemin Liu Chusheng Li Jun Dong Hailin | 2011 | Mining Science and Technology2011，21，5： | 14 |
| 2 | A virtual experiment showing single particle motion on a linearly vibrating screen-deck显示文摘A virtual sieving experimental simulation system was built using physical simulation principles.The effects of vibration frequency and amplitude,the inclination angle of the screen-deck and the vibration direction angle of screen on single particle kinematics were predicted.Properties such as the average velocity and the average throw height were studied.The results show that the amplitude and the angle of vibration have a great effect on particle average velocity and average height.The vibration frequency and the screen-deck inclination angle appear to have little influence on these responses.For materials that are difficult to screen the vibration frequency and amplitude,the screen-deck inclination angle and the vibration angle should be set to 14 Hz,6.6 mm,6° and 40°,respectively,to obtain optimal particle kinematics.A screening process can be simulated reliably by means of a virtual experiment and these results provide references for both screening theory research and sieving practice. | ZHAO, Lala LIU, Chusheng YAN, Junxia | 2010 | Mining Science and Technology2010，20，2： | 11 |
| 3 | DEM simulation of particle flow on a single deck banana screen显示文摘A mathematical study of particle flow on a banana screen deck using the discrete element method (DEM) was presented in this paper. The motion characteristics and penetrating mechanisms of particles on the screen deck were studied. Effects of geometric parameters of screen deck on banana screening process were also investigated. The results show that when the values of inclination of discharge and increment of screen deck inclination are 10° and 5° respectively, the banana screening process get a good screening performance in the simulation. The relationship between screen deck length and screening efficiency was further confirmed. The conclusion that the screening efficiency will not significantly increase when the deck length L≥430 mm (L/B ≥ 3.5) was obtained, which can provide theoretical basis for the optimization of banana screen. | Liu Chusheng Wang Hong Zhao Yuemin Zhao Lala Dong Hailin | 2013 | International Journal of Mining Science and Technology2013，23，2： | 8 |
| 4 | Watermarking of Digital Images in Frequency Domain显示文摘Invisible watermarking methods have been applied in frequency domains, trying to embed a small image inside a large original image. The original bitmap image will be converted into frequency domain to obtain the discrete cosine transform (DCT) matrices from its blocks. The bits of the logo image are embedded in random color components of the original image, as well as in random positions in each selected block. These positions are alternating current (AC) coefficients of the DCT matrix. The randomness is obtained from RC4 pseudorandom bit generator that determines in which color component this logo image bits will be embedded. The embedded bits have been hidden in random blocks in the image, which are chosen according to a (semi-random) function proposed in this work. | Sami E. I. Baba Lala Z. Krikor Thawar Arif Zyad Shaaban | 2010 | International Journal of Automation and computing2010，7，1： | 6 |
| 5 | Influence of vibration mode on the screening process显示文摘The screening of particles with different vibration modes was simulated by means of a 3D discrete element method (3D-DEM). The motion and penetration of the particles on the screen deck were analyzed for linear, circular and elliptical vibration of the screen. The results show that the travel velocity of the particles is the fastest, but the screening efficiency is the lowest, for the linear vibration mode. The circular motion resulted in the highest screening efficiency, but the lowest particle travel velocity. In the steady state the screening efficiency for each mode is seen to increase gradually along the longitudinal direction of the deck. The screening efficiency increment of the circular mode is the largest while the linear mode shows the smallest increment. The volume fraction of near-mesh size particles at the underside is larger than that of small size particles all along the screen deck. Linear screening mode has more near-mesh and small size particles on the first three deck sections, and fewer on the last two sections, compared to the circular or elliptical modes. | Dong Hailin Liu Chusheng Zhao Yuemin Zhao Lala | 2013 | International Journal of Mining Science and Technology2013，23，1： | 3 |
| 6 | Characterization of Moringa oleifera seed oil variety 'Periyakulam 1 ' 显示文摘 | LALAS S TSAKNIS J | 2002 | Journal of Food Composition and Analysis2002，15，1： | 1 |
| 7 | Ti-, Al-, and Cu-Doping Induced Gap States in LiFePO4 显示文摘 | Abbate M Lala S M Montoro L A | 2005 | Electrochemical and Solid-State Letters2005，8，6： | 1 |
| 8 | Stability during frying of Moringa oleifera seed oil variety 'Periyakulam 1 ' 显示文摘 | TSAKNIS J LALAS S | 2002 | Journal of Food Composition and Analysis2002，15，1： | 1 |
| 9 | Factors regulating trophoblast migration and invasiveness:Possible derangements contributing to pre-eclampsia and fetal injury显示文摘 | Lala PK Chakraborty C | 2003 | Placenta2003，24，6： | 1 |
| 10 | Restoration of TGF-beta regulation of plasminogen activator inhibitor-1 in Smad3-restituted human choriocarcinoma cell显示文摘 | Xu G Chakraborty C Lala P K | 2002 | Biochem Biophys Res Commun2002，294，： | 1 |
| 11 | Expression of TGF-beta signaling genes in the normal,premalignant,and malignant human trophoblast:loss ofsmad3 in choriocarcinoma cells显示文摘 | Xu G Chakraborty C Lala PK | 2001 | Biochem Biophys Res Commun2001，287，： | 1 |
| 12 | Elevated procalcitonin as a diagnostic marker in meningococcal disease显示文摘 | MILLS G D LALA H M OEHLEY M R | 2006 | Eur J Clin Micro- biol Infect Dis2006，25，： | 1 |
| 13 | Bisphosphonate treatment of bone fibrous dysplasia in McCune-Albright syndrome 显示文摘 | Lala R Matarazzo P Andreo M | 2006 | J Pediatr Endocrinol Metab2006，192，： | 1 |
| 14 | The Role of Coronary Artery Disease in Heart Failure显示文摘 | Anuradha Lala Akshay S. Desai | 2013 | Heart Failure Clinics2013，，： | 1 |
| 15 | Role of nitric oxide in tumor progression: lessons from experimental tumors显示文摘 | Lala PK Orucevic A | 1998 | Cancer Metastasis Rev1998，17，1： | 1 |
| 16 | Role of nitric oxide in tumor progression: Lessons from experimental tumor显示文摘 | Orucevic A | 1998 | Cancer Metastasis Rev1998，17，1： | 1 |
| 17 | Cyclooxygenase inhibitors retard murine mammary tumor progression by reducing tumor cell migration,invasiveness and angiogenesis 显示文摘 | Rozic J G Chakraborty C Lala P K | 2001 | International Journal of Cancer2001，93，4： | 1 |
| 18 | Burden of invasive group B Streptococcus disease and early neurological sequelae in South African infants显示文摘 | Dangor Z Lala SG Cutland CL | 2015 | PLo S One2015，10，12： | 1 |
| 19 | Functional role of cell surface integrins on human trophoblast cell migration :regulation by TGF-β, IGF-Ⅱ, and ⅠGFBP-Ⅰ显示文摘 | Irving JA Lala PK | 1995 | Exp Cell Res1995，217，3： | 1 |
| 20 | Restraint of trophoblast invasion of the uterus by decorin:role in pre-eclampsia显示文摘 | Nandi P Siddiqui MF Lala PK | 2016 | Am J ReprodImmunol2016，75，3： | 1 |
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