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| 1 | Development of a time-dependent energy model to calculate the mining-induced stress over gates and pillars显示文摘Generally, longwall mining-induced stress results from the stress relaxation due to destressed zone that occurs above the mined panel. Knowledge of induced stress is very important for accurate design of adjacent gateroads and intervening pillars which helps to raise the safety and productivity of longwall mining operations. This study presents a novel time-dependent analytical model for determination of the longwall mining-induced stress and investigates the coefficient of stress concentration over adjacent gates and pillars. The model is developed based on the strain energy balance in longwall mining incorporated to a rheological constitutive model of caved materials with time-varying parameters. The study site is the Tabas coal mine of Iran. In the proposed model, height of destressed zone above the mined panel, total longwall mining-induced stress, abutment angle, induced vertical stress, and coefficient of stress concentration over neighboring gates and intervening pillars are calculated. To evaluate the effect of proposed model parameters on the coefficient of stress concentration due to longwall mining, sensitivity analysis is performed based on the field data and experimental constants. Also, the results of the proposed model are compared with those of existing models. The comparative results confirm a good agreement between the proposed model and the in situ measurements. According to the obtained results, it is concluded that the proposed model can be successfully used to calculate the longwall mining-induced stress. Therefore, the optimum design of gate supports and pillar dimensions would be attainable which helps to increase the mining efficiency. | Mohammad Rezaei Mohammad Farouq Hossaini Abbas Majdi | 2015 | Journal of Rock Mechanics and Geotechnical Engineering2015，7，3： | 6 |
| 2 | Prediction of representative deformation modulus of longwall panel roof rock strata using Mamdani fuzzy system显示文摘Deformation modulus is the important parameter in stability analysis of tunnels, dams and mining structures. In this paper, two predictive models including Mamdani fuzzy system(MFS) and multivariable regression analysis(MVRA) were developed to predict deformation modulus based on data obtained from dilatometer tests carried out in Bakhtiary dam site and additional data collected from longwall coal mines. Models inputs were considered to be rock quality designation, overburden height, weathering,unconfined compressive strength, bedding inclination to core axis, joint roughness coefficient and fill thickness. To control the models performance, calculating indices such as root mean square error(RMSE),variance account for(VAF) and determination coefficient(R2) were used. The MFS results show the significant prediction accuracy along with high performance compared to MVRA results. Finally, the sensitivity analysis of MFS results shows that the most and the least effective parameters on deformation modulus are weathering and overburden height, respectively. | Mohammad Rezaei Mostafa Asadizadeh Abbas Majdi Mohammad Farouq Hossaini | 2015 | International Journal of Mining Science and Technology2015，25，1： | 6 |
| 3 | The Relationship Between Developmental Accumulation of Leaf Soluble Proteins and Vernalization Response of Wheat(Triticum aestivum L.em. Thell)显示文摘The relationship between vernalization requirement and quantitative and qualitative changes in total leaf soluble proteins were determined in one spring(cv.Kohdasht) and two winter(cvs.Sardari and Norstar) cultivars of wheat(Triticum aestivum L.) exposed to 4°C.Plants were sampled on days 2,14,21 and 35 of exposure to 4°C.The final leaf number(FLN) was determined throughout the vernalization periods(0,7,14,24,and 35 d) at 4°C.The final leaf number decreased until days 24 and 35 in Sardari and Norstar cultivars,respectively,indicating the vernalization saturation at these times.No clear changes were detected in the final leaf number of Kohdash cultivar,verifying no vernalization requirement for this spring wheat cultivar.Comparing with control,clear cold-induced 2-fold increases in proteins quantity occurred after 48 h following the 4°C-treatment in the leaves of the both winter wheat cultivars but,such response was not detected in the spring cultivar.However,the electrophoretic protein patterns showed between-cultivar and between-temperature treatment differences.With increasing exposure time to 4°C,the winter cultivars tended to produce more HMW polypeptides than the spring cultivar.Similar proteins were induced in both Sardari and Norstar winter wheat cultivars,however,the long vernalization requirement in Norstar resulted in high level and longer duration of expression of cold-induced proteins compared to Sardari with a short vernalization requirement.These observations indicate that vernalization response regulates the expression of low temperature(LT) tolerance proteins and determines the duration of expression of LT-induced proteins. | M Majdi G Karimzadeh S Mahfoozi | 2009 | Agricultural Sciences in China2009，8，4： | 5 |
| 4 | 无聚合物自转向酸在科威特油井酸化作业中的应用显示文摘一种新型的无聚合物黏弹性转向酸(VDA)在科威特石油公司 (KOC)所辖的油井中进行了 18井次的现场试验 ,使科威特北部油田中完井于Mauddud储层的老井恢复了生产 ,新投产井提高了可采储量。在科威特境内碳酸盐储层酸化处理面临技术难题的前提下 ,重点论述了VDA这种新型酸液体系的独特性能和现场应用效果。 | Majdi Al-Mutawa 肖洪武 赵炜 | 2003 | 国外油田工程2003，19，4： | 2 |
| 5 | Administration Dependent Antioxidant Effect of Carica papaya Seeds Water Extract显示文摘 | Elisa Panzarini Majdi Dwikat Stefania Mariano Cristian Vergallo Luciana Dini Mohamed Eddouks | 2014 | Evidence-Based Complementary and Alternative Medicine2014，，： | 2 |
| 6 | Experimental investigation of changes in petrophysical properties and structural deformation of carbonate reservoirs显示文摘To examine the effect of pressure on pore structure and petrophysical properties of carbonate rock, the porosity, permeability, CT scanning, SEM and elastic wave velocity of two carbonate core plug samples from an oilfield in Southwest Iran were analyzed under cyclic pressure. One of the plugs was calcite and the other was dolomite with anhydrite nodules. The cyclic pressure exerted on the samples increased from 13.79 MPa to 27.58 MPa in six steps, and the variations in petrophysical properties of the two samples at different pressure loading and unloading steps were counted and analyzed. The results show that the calcite sample decreases in porosity and permeability with the increase of pressure, which is consistent with the results from compression and shear wave velocity tests. In the dolomite sample, the decreasing trend was not observed;fluctuations of compressive and shear velocities were observed during the loading stage, which may be due to different geometries of the pores and the porosity variation in the sample. Understanding the variation of carbonate petrophysical properties with pressure is helpful for optimizing reservoir development scheme. | SALIMIDELSHAD Yaser MORADZADEH Ali KAZEMZADEH Ezatallah POURAFSHARY Peyman MAJDI Abbas | 2019 | Petroleum Exploration and Development2019，46，3： | 2 |
| 7 | Factors influencing the yield of mesenteric angiography in lower gastrointestinal bleed显示文摘AIM: To assess if certain triaging rules could be established to optimize the yield of mesenteric angiography. METHODS: Medical records of 101 patients were retrospectively reviewed and parameters relating to age, gender, pulse rate, blood pressure, serum hemoglobin, intensive care unit(ICU) admission, and the number of packed red blood cells(PRBC) transfused in the 12 and 24 h prior to the angiography were tabulated in two groups with positive and negative angiography results. RESULTS: We found no correlation between gender, pulse rate, blood pressure or serum hemoglobin and positivity of the mesenteric angiogram. But patients with positive angiogram were found to be on average 7 years older(73.2 years vs 65.9 years old)(P = 0.02). Angiogram was positive in 39.3 %(11/28) of patientsadmitted in ICU vs 23.2%(17/73) who were admitted elsewhere in the hospital(P = 0.03). In the 12 and 24 h prior to angiography, patients with a positive angiogram received a mean of 2.7 ± 2.3 and 3.3 ± 2.6 units of PRBC s respectively, while patients with a negative angiogram had a mean of 1.6 ± 1.9(P = 0.02) and 2.1 ± 2.6 units(P = 0.04) received respectively in the same period. CONCLUSION: Older age, ICU admission, having received at least 4 units PRBC over 12 h or 5 units over 24 h prior to angiogram are leading indicators for a positive study. | Pasteur Rasuli Joseph Doumit Majdi Boulos Caroline Rizk Gaby Doumit | 2014 | World Journal of Radiology2014，6，5： | 2 |
| 8 | Interactive effects of soil warming and fertilization on root production,mortality,and longevity in a Norway spruce stand in Northern Sweden显示文摘 | MAJDI H OHRVIK J | 2004 | Global Change Biology2004，10，： | 1 |
| 9 | Identification ofwell logs with significant impact on prediction of oil and gasreservoirs permeability using statistical analysis of RSE values显示文摘 | MAJDI A BEIKI M PIRAYEHGAR A | 2010 | Journal of Petroleum Science and Engineering2010，75，： | 1 |
| 10 | Improving the performance of a proportional 4/3 water–hydraulic valve by using a diamond-like-carbon coating显示文摘 | F. Majdi? I. Velkavrh M. Kalin | 2013 | Wear (-)2013，，1： | 1 |
| 11 | Demography of fine roots in response to nutrient applications in a Norway spruce stand in southwestern Sweden显示文摘 | Majdi H Kangas P | 1997 | Ecoscience1997，4，： | 1 |
| 12 | Does liquid fertilization affect fine root dynamics and lifespan of mycorrhizal short root显示文摘 | Majdi H and Nylund J E | 1996 | Plant and Soil1996，185，： | 1 |
| 13 | Changes in fine root production and longevity in relation to water and nutrient availability in a Norway spruce stand in north- em Sweden显示文摘 | Majdi H | 2001 | Tree Physiology2001，21，14： | 1 |
| 14 | Regulation of nicotinic acetylcholine receptors in Alzheimer?s disease: a possible role of chaper- ones 显示文摘 | Sadigh-Eteghad S Majdi A Talebi M | 2015 | Eur J Pharmacol2015，755，： | 1 |
| 15 | Prediction of the height of destressed zone above the mined panel roof in longwall coal mining显示文摘 | Abbas Majdi Feni P Hassani Mehdi Yousef Nasiri | 2012 | International Journal of Coal Geology2012，98，1： | 1 |
| 16 | Does liquid fertilization affect fine root dynamics and life span of mycorrhizal short root显示文摘 | Nylund JE | 1996 | Plant and soil1996，，185： | 1 |
| 17 | Electrochemical oxidation and determination of ceftriaxone on a glassy carbon and carbon-nanotubemodified glassy carbon electrodes显示文摘 | Majdi S Jabbari A Heli H | 2009 | Journal of Solid State Electrochemistry2009，13，3： | 1 |
| 18 | Erythropoietin levels in aqueous humor of pa- tients with glaucoma显示文摘 | Nassiri N Nassiri N Majdi M Mehrjardi HZ Shakiba Y Hagh-negahdar M | 2012 | Mol Vis2012，18，： | 1 |
| 19 | Measuring fine root turnover in forest ecosystems显示文摘 | Majdi H Pregitzer K Moren A S | 2005 | Plant and Soil2005，276，12： | 1 |
| 20 | Positive reactions in carbonate reservoir stimulation 显示文摘 | Ealian Al-Anzi Majdi Al-Mutawa Nabil Al-Habib | 2003 | Oilfleld Review2003，2004，： | 1 |
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