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| 1 | Estimating rock properties using sound signal dominant frequencies during diamond core drilling operations显示文摘In many engineering applications such as mining,geotechnical and petroleum industries,drilling operation is widely used.The drilling operation produces sound by-product,which could be helpful for preliminary estimation of the rock properties.Nevertheless,determination of rock properties is very difficult by the conventional methods in terms of high accuracy,and thus it is expensive and timeconsuming.In this context,a new technique was developed based on the estimation of rock properties using dominant frequencies from sound pressure level generated during diamond core drilling operations.First,sound pressure level was recorded and sound signals of these sound frequencies were analyzed using fast Fourier transform (FFT).Rock drilling experiments were performed on five different types of rock samples using computer numerical control (CNC) drilling machine BMV 45 T20.Using simple linear regression analysis,mathematical equations were developed for various rock properties,i.e.uniaxial compressive strength,Brazilian tensile strength,density,and dominant frequencies of sound pressure level.The developed models can be utilized at early stage of design to predict rock properties. | Ch.Vijaya Kumar Harsha Vardhan Ch.S.N.Murthy N.C.Karmakar | 2019 | Journal of Rock Mechanics and Geotechnical Engineering2019，11，4： | 3 |
| 2 | Effect of Center Voltage Vectors(CVVs)of Three-level Space Plane on the Performance of Dual Inverter Fed Open End Winding Induction Motor Drive显示文摘Dual inverter fed open end winding induction motor(IM)drive offers many advantages over other multilevel inverter fed IM drives.Pulse width modulation(PWM)techniques are employed for the control of output voltage and frequency.Space vector base PWM techniques are popular among all the PWM techniques.A simplified space vector PWM method with simple and small look-up table approach is presented for dual inverter configuration.Moreover the proposed space vector based PWM technique provides freedom in selecting the center voltage vector(CVV)by which different PWM techniques will be derived.The implementation of all these PWM techniques is generalized by using a constant ao.The derived PWM techniques show superior performance in reducing the zero sequence voltage(ZSV)by maintaining the same quality of output voltage.The performance of all these PWM techniques are evaluated theoretically and verified in real time through dSPACE 1104 control board. | M.Harsha Vardhan Reddy K.Sri Gowri T.Bramhananda Reddy G.Kishor | 2019 | Chinese Journal of Electrical Engineering2019，5，2： | 3 |
| 3 | A robust soc-MOF platform exhibiting high gravimetric uptake and volumetric deliverable capacity for on-board methane storage显示文摘Emerging as an outperformed class of metal-organic frameworks(MOFs),square-octahedron(soc)topology MOFs(soc-MOFs)feature superior properties of high porosity,large gas storage capacity,and excellent thermal/chemical stability.We report here an iron based soc-MOF,denoted as Fe-pbpta(H4pbpta=4,4',4'',4'''-(1,4-phenylenbis(pyridine-4,2-6-triyl))-tetrabenzoic acid)possessing a very high Brunauer,Emmett and Teller(BET)surface area of 4,937 m2/g and a large pore volume of 2.15 cm3/g.The MOF demonstrates by far the highest gravimetric uptake of 369 cm3(STP)/g under the DOE operational storage conditions(35 bar and 298 K)and a high volumetric deliverable capacity of 192 cc/cc at 298 K and 65 bar.Furthermore,Fe-pbpta exhibits high thermal and aqueous stability making it a promising candidate for on-board methane storage. | Gaurav Verma Sanjay Kumar Harsh Vardhan Junyu Ren Zheng Niu Tony Pham Lukasz Wojtas Sydney Butikofer Jose C Echeverria Garcia Yu-Sheng Chen Brian Space and Shengqian Ma | 2021 | Nano Research2021，14，2： | 2 |
| 4 | Automatic seizure detection in ECoG by differential operator and windowed variance 显示文摘 | Majumdar KK Vardhan P | 2011 | IEEE Transactions on Neural Systems and Rehabilitation Engineering2011，19，4： | 1 |
| 5 | A low - complexity detector for large MI- MO Systems and multiearrier CDMA Systems 显示文摘 | VISHNU VARDHAN K SAIF K MOHAMMED CHOCK- ALINGAM A | 2008 | IEEE Journal on Selected Areas in Communications2008，26，3： | 1 |
| 6 | Strategies in the design of low power wireless sensor network for the measurement and monitoring of physiological parameters显示文摘 | Vardhan DV Murthy YN Prasad MNG | 2013 | Strategies2013，2，5： | 1 |
| 7 | Cervical epithelial cellsfrom Chlamydia trachomatis-infected sites co-expresshigher levels of chlamydial heat shock proteins 60 and10in infertile women than in fertile women显示文摘 | Jha R’Vardhan H Bas S | 2009 | GynecolObstet Invest2009，68，3： | 1 |
| 8 | Continuousdrive friction welding of Inconel 718 and EN24 dissimilar metalcombination显示文摘 | Vardhan L S Madhusudhan R G Mohandas T | 2009 | Materials Science and Technology2009，25，7： | 1 |
| 9 | Decreased suscep- tibility to azithromycin and doxycycline in clinical isolates of Chlamydia trachomatis obtained from recurrently infected female patients in India显示文摘 | Bhengraj AR Vardhan H Srivastava P | 2010 | Chemotherapy2010，56，5： | 1 |
| 10 | Restriction analysis and partial sequencing of the 16S rRNA gene as index for rapid identification of Bacillus species显示文摘 | Vardhan Sv Kaushik R Saxena A K | 2011 | Antonie van Leeuwenhoek2011，99，2： | 1 |
| 11 | Chlamydia trachomatisheat shock proteins 60 and 10 induce apoptosis in en-docervical epithelial cells 显示文摘 | Jha R Vardhan H’Bas S | 2011 | Inflamm Res2011，60，1： | 1 |
| 12 | Higher incidence of persistent chronic infection of Chlamydia pneumoniae among coronary artery disease patients in India is a cause of concern显示文摘 | Jha HC Vardhan H Gupta R | 2007 | BMC Infectious Diseases2007，7，： | 1 |
| 13 | Continuous drive friction welding of Inconel 718 and EN24dissimilar metal combination显示文摘 | VARDHAN L S MADHUSUDHAN R G MOHANDAS T | 2009 | Materials Science andTechnology2009，25，7： | 1 |
| 14 | Familial Crouzon syndrome 显示文摘 | SAMATHA Y HARSHA VARDHAN T RAVIKIRAN A | 2010 | Contemporary Clinical Dentistry2010，1，4： | 1 |
| 15 | Host immune responses to chlamydial inclusion membrane proteins B and C in Chlamydia trachomatis infected women with or without fertility disorders显示文摘 | Gupta R Srivastava P Vardhan H | 2009 | Reproductive Biology and Endocrinology2009，7，： | 1 |
| 16 | Higher incidence of presistent chronic infection of Chlamydia pneumoniae among coronary artery disease patients in India is a cause of concern显示文摘 | Jha HC Vardhan H Gupta R | 2007 | BMC Infect Dis2007，30，7： | 1 |
| 17 | Azithromycin treatment modulates the extracellular signal-regulated kinase mediated pathway and inhibits inflammatory cytokines and chemokines in epithelial cells from infertile women with recurrent Chlamydia trachomatis infection显示文摘 | Starivasva P Vardhan H Bhengraj AR | | 0，，08： | 1 |
| 18 | Metric based on morphological dilation for the detection of spatially significant zones显示文摘 | Sagar B S D Rajesh N Vardhan S A | 2013 | IEEE Geoscience and Remote Sensing Letters2013，10，3： | 1 |
| 19 | A new procedure for performance prediction of air conditioning coils显示文摘 | Vardhan A Dhar P L | 1998 | International Journal of Refrigeration1998，21，1： | 1 |
| 20 | A new procedure for performance prediction of air conditioning coils显示文摘 | VARDHAN A DHAR P L | 1998 | International Journal Refrigeration1998，21，1： | 1 |
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