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Direct scaling of residual displacements for bilinear and pinching oscillators

Earthquake Engineering and Engineering Vibration 2024年第1期23卷 129-149页

作者： mohammad saifullah Vinay K.Gupta Department of Civil Engineering Indian Institute of Technology KanpurKanpur 208016India

The estimation of residual displacements in a structure due to an anticipated earthquake event has increasingly become an important component of performance-based earthquake engineering because controlling these displacements plays an important role in ensuring cost-feasible or cost-effective repairs in a damaged structure after the *** attempt is made in this study to obtain statistical estimates of constant-ductility residual displacement spectra for bilinear and pinching oscillators with 5%initial damping,directly in terms of easily available seismological,site,and model *** of the available models for the bilinear and pinching oscillators are useful when design spectra for a seismic hazard at a site are not *** statistical estimates of a residual displacement spectrum are proposed in terms of earthquake magnitude,epicentral distance,site geology parameter,and three model parameters for a given set of ductility demand and a hysteretic energy capacity coefficient in the case of bilinear and pinching models,as well as for a given set of pinching parameters for displacement and strength at the breakpoint in the case of pinching model *** proposed scaling model is applicable to horizontal ground motions in the western *** earthquake magnitudes less than 7 or epicentral distances greater than 20 km.

关键词： residual displacement spectrum bilinear hysteresis model pinching hysteresis model nonlinear analysis scaling model

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Diagnosis and Recommendation Integrated System Assessment of the Nutrients Limiting and Nutritional Status of Tomato

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Phyton-International Journal of Experimental Botany 2022年第12期91卷 2759-2774页

作者： Rabia Manzoor mohammad Saleem Akhtar Khalid saifullah Khan Taqi Raza Muhammad Ishaq Asif Rehmani Carl Rosen Muhammad Khalil ur Rehman Nahla Zidan Fahad MAlzuaibr Nisreen MAbdulsalam Najla AKhateeb Majid Alhomrani Abdulhakeem SAlamri Javeed Ahmad Lone Muhammad Ammar Raza Ayman El Sabagh Institute of Soil and Environmental Sciences Pir Mehr Ali Shah Arid Agriculture University RawalpindiRawalpindi46300Pakistan Department of Biosystems Engineering&Soil Science University of TennesseeKnoxville37996USA Department of Agronomy Ghazi UniversityDera Ghazi Khan32200Pakistan Department of Soil Waterand ClimateUniversity of MinnesotaSant Paul55108USA Department of Horticultural Sciences The Islamia University of BahawalpurBahawalpur63100Pakistan Department of Nutrition and Food Science Faculty of Home EconomicsUniversity of TabukTabuk71491Saudi Arabia Department of Biology Faculty of ScienceUniversity of TabukTabuk71491Saudi Arabia Department of Food and Nutrition Faculty of Human Sciences and DesignKing Abdul Aziz UniversityJeddah21551Saudi Arabia Clinical Nutrition Department College of Applied Medical SciencesKing Saud bin Abdulaziz University for Health SciencesJeddah211423Saudi Arabia Department of Clinical Laboratories Sciences The Faculty of Applied Medical SciencesTaif UniversityTaif21944Saudi Arabia Centre of Biomedical Sciences Research(CBSR) Deanship of Scientific ResearchTaif UniversityTaif21944Saudi Arabia Mountain Research Centre for Field Crops Sher-e-Kashmir University of Agricultural Sciences and TechnologySrinagar190025India College of Food Science and Biotechnology Key Laboratory of Fruits and VegetablesZhejiang Gongshang UniversityHangzhou310018China Department of Agronomy Faculty of AgricultureKafrelsheikh UniversityKafrelsheikh33156Egypt

Tomato is an important field crop,and nutritional imbalances frequently reduce its *** and Recommendation Integrated System(DRIS),uses ratios for nutrient deficiency diagnosis instead of absolute concentration in plant *** this study,local DRIS norms for the field tomatoes were established and the nutrient(s)limiting tomatoes yield were *** leaves were analyzed for nutrients,to identify nutritional status using the DRIS *** hundred tomatoes fields were selected from Chatter Plain Khyber Pakhtunkhwa and the Sheikupura Punjab *** first fully matured leaf was sampled,rinsed,dried and ground for analyzing P,K,Ca,Mg,Cu,Fe,Mn and Zn using an Inductively Coupled Plasma Atomic Emission Spectrophotometer(ICP AES).Plant tissue N and S were measured by the combustion *** tomatoes yields were recorded at each *** data were divided into high-yielding(≥3.79 kg/10 plant)and low-yielding(<3.79 kg/10 plant)populations and norms were computed using standard DRIS ***-yielding plant population had a statistically greater mean S and Fe than the low-yielding *** average balance index,the sum of functions,for S and Fe were−11.04 and−5.17 which reflected deficiency of S and *** nutrients norms established may optimize plant nutrition in field tomatoes for high yield.

关键词： DRIS macro and micro nutrients nutrients norms plant population tomato production

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