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| 1 | Classification and assessment of rock mass parameters in Choghart iron mine using P-wave velocity显示文摘Engineering rock mass classification,based on empirical relations between rock mass parameters and engineering applications,is commonly used in rock engineering and forms the basis for designing rock structures.The basic data required may be obtained from visual observation and laboratory or field tests.However,owing to the discontinuous and variable nature of rock masses,it is difficult for rock engineers to directly obtain the specific design parameters needed.As an alternative,the use of geophysical methods in geomechanics such as seismography may largely address this problem.In this study,25 seismic profiles with the total length of 543 m have been scanned to determine the geomechanical properties of the rock mass in blocks Ⅰ,Ⅲ and Ⅳ-2 of the Choghart iron mine.Moreover,rock joint measurements and sampling for laboratory tests were conducted.The results show that the rock mass rating(RMR) and Q values have a close relation with P-wave velocity parameters,including P-wave velocity in field(V_(PF)).P-wave velocity in the laboratory(V_(PL)) and the ratio of V_(PF) V_(PL)(i.e.K_p = V_(PF)/V_(PL).However,Q value,totally,has greater correlation coefficient and less error than the RMR,In addition,rock mass parameters including rock quality designation(RQD),uniaxial compressive strength(UCS),joint roughness coefficient(JRC) and Schmidt number(RN) show close relationship with P-wave velocity.An equation based on these parameters was obtained to estimate the P-wave velocity in the rock mass with a correlation coefficient of 91%.The velocities in two orthogonal directions and the results of joint study show that the wave velocity anisotropy in rock mass may be used as an efficient tool to assess the strong and weak directions in rock mass. | Mohammadreza Hemmati Nourani Mohsen Taheri Moghadder Mohsen Safari | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，2： | 8 |
| 2 | Daily and Monthly Suspended Sediment Load Predictions Using Wavelet Based Artificial Intelligence Approaches显示文摘In the current study, the efficiency of Wavelet-based Least Square Support Vector Machine(WLSSVM) model was examined for prediction of daily and monthly Suspended Sediment Load(SSL) of the Mississippi River. For this purpose, in the first step, SSL was predicted via ad hoc LSSVM and Artificial Neural Network(ANN) models; then,streamflow and SSL data were decomposed into subsignals via wavelet, and these decomposed sub-time series were imposed to LSSVM and ANN to simulate discharge-SSL relationship. Finally, the ability of WLSSVM was compared with other models in multistep-ahead SSL predictions. The results showed that in daily SSL prediction, LSSVM has better outcomes with Determination Coefficient(DC)=0.92 than ad hoc ANN with DC=0.88. However unlike daily SSL, in monthly modeling, ANN has a bit accurate upshot.WLSSVM and wavelet-based ANN(WANN) models showed same consequences in daily and different in monthly SSL predictions, and adding wavelet led to more accuracy of LSSVM and ANN. Furthermore,conjunction of wavelet to LSSVM and ANN evaluated via multi-step-ahead SSL predictions and, e.g.,DC LSSVM=0.4 was increased to the DC WLSSVM=0.71 in 7-day ahead SSL prediction. In addition, WLSSVM outperformed WANN by increment of time horizon prediction. | Vahid NOURANI Gholamreza ANDALIB | 2015 | Journal of Mountain Science2015，12，1： | 6 |
| 3 | Hot Deformation Characteristics of 34CrMo4 Steel显示文摘The 34CrMo4(AISI 4130)steel is extensively utilized in the compressed natural gas cylinders.Due to the importance of thermomechanical processing in the production of these cylinders,the dynamic recrystallization(DRX)characteristics of 34CrMo4 steel were investigated.The effect of hot deformation parameters such as temperature and strain rate on the dynamic restoration processes of a 34CrMo4 alloy was studied.Hot compression tests were performed in the temperature range of 900 to 1100 ℃ and the strain rate range of 0.001 to 0.1 s-1.Hot workability of this alloy has been analyzed by employing flow localization parameter.The flow curves observed are typical of occurrence of dynamic recrystallization and have exhibited single or multiple peaks in flow stress curve before reaching steady state,depending on the temperature and strain rates.The flow stress decreases with the increase of deformation temperature and the decrease of strain rate.Finally the activation energy obtained in this research is 490.749 kJ/mol. | S V Sajadi Far M Ketabchi M R Nourani | 2010 | Journal of Iron and Steel Research(International)2010，17，12： | 4 |
| 4 | The role of nuclear factor -kappaB in inflammatory lung disease显示文摘 | Imanifooladi AA Yazdani S Nourani MR | 2010 | Inflamm Allergy Drug Targets2010，9，3： | 1 |
| 5 | Testing SoC interconnects for signal integrity using extended JTAG architecture显示文摘 | Mohammad HT Nisar Ahmed Mehrdad Nourani | 2004 | IEEE Trans CAD of IC and Syst2004，23，5： | 1 |
| 6 | A combined neural-wavelet model for prediction of Ligvanchai watershed precipitation 显示文摘 | Vahid Nourani | 2009 | Engineering Applications of Artificial Intelligence2009，22，： | 1 |
| 7 | Hypothalamic melanin-concentrating hormone is induced by cold exposure and participates in the control of energy expenditure in rats显示文摘 | Pereim - DA - Siva M Torsoni M A Nourani H V | 2003 | Endocfinol2003，144，11： | 1 |
| 8 | Chemotherapy and donor leukocyte infusions for relapsed juvenile my-elomonocytic leukemia(JMML)显示文摘 | Neudorf S Nourani A Kempert P | 2004 | Bone Marrow Transplant2004，33，10： | 1 |
| 9 | False path exclusion in delay analysis of RTL structures显示文摘 | Nourani M Papachristou C A | 2002 | IEEE Transactions on Very Large Scale Integration Systems2002，10，1： | 1 |
| 10 | RL-Huffman encoding for test compression and power reduction in scan applications显示文摘 | NOURANI M TEHRANIPOUR M | 2005 | ACM Trans Des Autom of Elec Syst2005，10，1： | 1 |
| 11 | Low-power single and double-edge-triggered flip-flops for high-speed applications显示文摘 | RASOULI S H KHADEMZADEH A AFZALI-KUSHA A NOURANI M | 2005 | IEE Proceedings Circuits Devices and Systems2005，152，2： | 1 |
| 12 | Role of an ING1 growth regulator in transcriptional activation and targeted histone acetylation by the NuA4 complex显示文摘 | Nourani A Doyon Y Utley RT | 2001 | Mol Cell Biol2001，21，22： | 1 |
| 13 | Probiotic as a novel treatment strategy against liver disease 显示文摘 | Imani Fooladi AA Mahmoodzadeh Hosseini H Nourani MR | 2013 | Hepat Mon2013，13，： | 1 |
| 14 | Testing SOC interconnects for signal integrity using extended JTAGarchitecture显示文摘 | Tehranipour M H Ahmed N Nourani M | 2004 | IEEE Transactions on Computer Aid Design of Integrated Circuits and Systems2004，，5： | 1 |
| 15 | Evidence thatSpt2/Sinl, an HMG-like factor, plays roles intranscription elongation, chromatin structure, andgenome stability in Saccharomyces cerevisiae显示文摘 | Nourani A Robert F Winston F | 2006 | Molecular and Cellular Biology2006，26，4： | 1 |
| 16 | Testing SOC interconnects for signal integrity using extended JTAG architecture显示文摘 | Tehranipour M H Ahmed N Nourani M | 2004 | IEEE Trans Comp Aid Des of Integr Circ and Syst2004，23，5： | 1 |
| 17 | Influence of culture condition on exopoly -saccharides production by Lactobacillus rhamnosus strain C83显示文摘 | Gammar Nourani L blondeau K Simonet J M | 1998 | J of Appl Microbiol1998，85，4： | 1 |
| 18 | Expression of glutathione S-transferase variants in human airway wall after long-term response to sulfur mustard显示文摘 | Nourani MR Azimzadeh S Ghanei M Imani Fooladi AA | 2014 | J Recept Signal Transduct Res2014，34，2： | 1 |
| 19 | Opposite role of yeast ING family members in p53-dependent transcriptional activation 显示文摘 | Nourani A Howe L Pray-Grant MG | 2003 | J Biol Chem2003，278，19： | 1 |
| 20 | The role of nuclear factor-kappa B in inflammatory lung disease显示文摘 | Imanifooladi AA Yazdani S Nourani MR | 2010 | Inflamm Allergy Drug Targets2010，9，3： | 1 |
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