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新疆石油地质 2001年第2期22卷 172-176页

作者： ЕpШObC.b. kaэаненkoвb.A. kароroдиню.H. ИHCTHTYTreoпrиннефтннraaaCибнpckoroOтдениБPoccийckoйAkaдemиинayk HoBocибHpck630090PoccиБ

Hydrological impacts of afforestation-A review of research in India

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Journal of Forestry Research 2014年第1期25卷 37-42页

作者： b.Venkatesh N.Lakshman b.k.Purandara Regional Centre National Institute of Hydrology Department of Applied Mechanics National Institute of Technology Karnataka

We review the current status of experimental studies in India to understand the linkages between afforestation and hydrology. This discipline deals with the use and management of water, social awareness of environmental problems, and ecosystem limitations on provision of watershed services by river basins in the mountain regions of India. Our review begins with examination of experimental works in tropical countries and proceeds to discussion of initiatives of Indian research institutes and Government organizations towards establishing experimental watersheds to understand the impacts of land cover changes on hydrologic regimes in the Indian sub-continent. This is followed by the review of the experimental work carried out by various authors to assess the impact of land cover changes on major water balance components such as, runoff, groundwater, evapotranspiration and sediment yield. The spatial scales of these experiments have been limited to small watersheds or field plots. This paper also describes impacts of human interventions （such as planta- tions of exotic forest species to restore degraded landscapes） on the water balance components in diverse hydro-geo-environmental conditions in the Indian sub-continent. We focus on identifying the research areas which require immediate attention to develop tools to assist planners and policy makers in assessing and managing the water resources in these complex environments. The review is largely based on research results reported during the last 20 to 30 years.

关键词： afforestation Western Ghats experimental watersheds land-use/cover changes humid tropics

Nuclear structure and decay modes of Ra isotopes within an axially deformed relativistic mean field model

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Chinese Physics C 2018年第8期42卷 121-129页

作者： Rashmirekha Swain S.k.Patra b.b.Sahu School of Applied Sciences KIIT Deemed to be UniversityBhubaneswar-751024OdishaIndia Institute of Physics Bhubaneswar-751005India

We examine the structural properties and half-life decay of Ra isotopes within the axially deformed Relativistic Mean-Field（RMF）theory with NL3 force *** work out the binding energy（bE）,RMS radii,two-neutron separation energies（S（2n））,and some other *** results are in good agreement with the finite-range droplet model（FRDM）and experimental *** the possibility of neutron magic number,theα-decay and cluster decay half-lives of Ra isotopes are calculated systematically using the Q-values obtained from the RMF *** decay half-life calculations are carried out by taking three different empirical *** calculated decay half-lives are found to be highly sensitive to the choice of *** shell or sub-shell closures are found at daughter nuclei with N=128 and N=126 when alpha and 8be,12C,18O respectively are emitted from Ra *** the cluster radioactivity is affected by the shell closure of parent and daughter,a long half-life indicates the stability of the parent,and a small parent half-life indicates that the shell stability of the daughter against decay.

关键词： relativistic mean field nuclear bulk properties alpha and cluster decay half-life

Structural and mass transport properties of liquid ytterbium in the temperature range 1123 k–1473 k

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Chinese Physics b 2023年第6期32卷 481-488页

作者： D D Satikunvar N k bhatt b Y Thakore Department of Physics Sardar Patel UniversityVallabh VidyanagarGujarat 388120India Department of Physics Maharaja Krishnakumarsinhji Bhavnagar UniversityBhavnagarGujarat 364001India

We have studied the structural and atomic transport properties of liquid f-shell Yb in the temperature range 1123 k–1473 k. Pair interactions between atoms are derived using a local pseudopotential. The potential parameters are fitted to the phonon dispersion curve at room temperature. The local pseudopotential used in the present study is computationally more efficient with only three parameters, and it is found to be transferable to the liquid phase without changing the *** the various computed properties agree with reported theoretical and experimental findings, the adopted fitting scheme is justified. As a significant outcome of the study, we find that(i) the melting in Yb is governed by the Lindemann's law,(ii)the mass transport mechanism obeys the Arrhenius law,(iii) the role of the three-particle correlation function in deriving the velocity autocorrelation function is small,(iv) the mean-square atomic displacement is more sensitive to the choice of interaction potential than the other bulk properties, and(v) liquid Yb does not show liquid–liquid phase transition within the studied temperature range. Further, due to the good description of the structural and mass transport properties, we propose that Yb remains divalent at reduced density.

关键词： transport properties pseudopotential single-particle dynamics ytterbium

Strange quark mass(ms)dependent model of anisotropic strange quark star

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Chinese Physics C 2023年第9期47卷 145-161页

作者： A.Hakim k.b.Goswami P.k.Chattopadhyay Department of Physics Coochbehar Panchanan BarmaUniversityVivekananda StreetDistrict:Coochbehar736101West BengalIndia

This article presents the configuration of strange quark stars in hydrostatic equilibrium considering the Vaidya-Tikekar metric *** interior of such stars comprises strange quark matter(henceforth SQM),whose equation of state(hencefor orth EoS)is described by the MIT EoS p=1/3(p-4b),where b is the difference between perturbative and non-perturbative *** have included the mass of the strange quark into the EoS and studied its effect on the overall properties of the strange quark star in this *** is observed that the maximum mass reaches its highest value *** have evaluated the range of the maximum mass of the strange quark star by solving the TOV equation for 57.55bble strange quark matter at a zero external pressure condition with respect to *** mass lies within the range of to when b ranges from 57.55 to 91.54MeV/fm^(3)and ms=*** is noted that the maximum mass decreases with an increase *** model is found suitable for describing the mass of pulsars such as PSR J1614-2230 and Vela X-1 and the secondary objects in the GW170817 *** model is also useful in predicting the radius of the recently observed pulsars PSR J0030+0451,PSR J0740+6620,and PSR J0952-0607 and the secondary objects in the GW170817 and GW190814 *** model is found to be stable with respect to all stability criteria of the stellar configurations and is also stable with respect to small perturbations.

关键词： Einstein field equation strange star strange quark mass MIT bag model

Magnesium matrix composite reinforced by nanoparticles-A review

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Journal of Magnesium and Alloys 2021年第1期9卷 57-77页

作者： k.b.Nie X.J.Wang k.k.Deng X.S.Hu k.Wu State key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

Significant progress has been made in magnesium-based composites during recent decades,especially for the appearance of magnesium matrix composite reinforced by *** nanoparticles added not only exhibit a good strengthening effect,but also maintain the initial toughness of the matrix,effectively balancing the contradiction between the strength and plasticity in the traditional magnesium matrix *** magnesium matrix nanocomposites with excellent mechanical properties have pushed the development of magnesium matrix composites to a new ***,it is very difficult to disperse the nanoparticles in metal melt especially in magnesium melt which is different from other metal melts and dangerous during the cast *** means that the preparation of magnesium matrix nanocomposite is extremely ***,the magnesium matrix nanocomposites possess a distinctive characteristic in deformation behavior,strengthening and toughening mechanism due to their special size effect of ***,this review will focus on the new preparation technologies,deformation behavior,mechanical properties and strengthening and toughening *** potential applications,development trends and future research ideas of magnesium matrix nanocomposite are also prospected.©2020 Published by Elsevier *** behalf of Chongqing University.

关键词： Magnesium matrix nanocomposite Microstructure Mechanical properties Strengthening mechanism

High-dose hepatitis b immunoglobulin therapy in hepatocellular carcinoma with hepatitis b virus-DNA/hepatitis b e antigen-positive patients after living donor liver transplantation

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World Journal of Gastroenterology 2016年第14期22卷 3803-3812页

作者： Eung Chang lee Seong Hoon kim Seung Duk lee Hyeongmin Park Soon-Ae lee Sang-Jae Park Center for Liver Cancer National Cancer Center

AIM: To investigate the impact of high-dose hepatitis b immunoglobulin(HbIG) on hepatocellular carcinoma(HCC) and hepatitis b virus(HbV) recurrence and overall survival after living donor liver transplantation(LDLT).METHODS: We investigated 168 patients who underwent LDLT due to HCC, and who were HbV-DNA/hepatitis b e antigen(Hbe Ag)-positive, from January 2008 to December 2013. After assessing whether the patients met the Milan criteria, they were assigned to the low-dose HbIG group and high-dose HbIG group. Using the propensity score 1:1 matching method, 38 and 18 pairs were defined as adhering to and not adhering to the Milan criteria. For each pair, HCC recurrence, HbV recurrence and overall survival were analyzed by the kaplan-Meier method and the log rank test according to the HbIG dose. RESULTS: Among those who met the Milan criteria, the 6-mo, 1-year, and 3-year HCC recurrence-free survival rates were 88.9%, 83.2%, and 83.2% in the low-dose HbIG group and 97.2%, 97.2%, and 97.2% in the high-dose HbIG group, respectively(P = 0.042).In contrast, among those who did not meet the Milan criteria, HCC recurrence did not differ according to the HbIG dose(P = 0.937). Moreover, HbV recurrence and overall survival did not differ according to the HbIG dose among those who met(P = 0.317 and 0.190, respectively) and did not meet(P = 0.350 and 0.987, respectively) the Milan criteria. CONCLUSION: High-dose HbIG therapy can reduce HCC recurrence in HbV-DNA/Hbe Ag-positive patients after LDLT.

关键词： Hepatitis b immune globulin Hepatocellular carcinoma Hepatitis b virus-DNA Liver transplantation Hepatitis b e antigen

Patterns of in-hospital mortality and bleeding complications following PCI for very elderly patients： insights from the Dartmouth Dynamic Registry

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Journal of Geriatric Cardiology 2018年第2期15卷 131-136页

作者： Shawn X Li Hannah I Chaudry Jiyong lee Theodore b Curran Vishesh kumar kendrew k Wong bruce W Andrus James T DeVries Dartmouth Geisel School of Medicine Hanover NH USA Department of Internal Medicine Dartmouth-Hitcheock Medical Center Lebanon NH USA Section of Cardiovascular Medicine Dartmouth-Hitchcock Medical Center Lebanon NH USA

background Very elderly patients （age 〉 85 years） are a rapidly increasing segment of the population. As a group, they experience high rates of in-hospital mortality and bleeding complications following percutaneous coronary intervention （PCI）. However, the relationship between bleeding and mortality in the very elderly is unknown. Methods Retrospective review was performed on 17,378 consecutive PCI procedures from 2000 to 2015 at Dartmouth-Hitchcock Medical Center. Incidence of bleeding during the index PCI admission （bleeding requiring transfusion, access site hematoma 〉 5 cm, pseudoaneurysm, and retroperitoneal bleed） and in-hospital mortality were reported for four age groups （〈 65 years, 65-74 years, 75-84 years, and ≥ 85 years）. The mortality of patients who suffered bleeding complications and those who did not was calculated and multivariate analysis was performed for in-hospital mortality. Lastly, known predictors of bleeding were compared between patients age 〈 85 years and age ≥85 years. Results Of 17,378 patients studied, 1019 （5.9%） experienced bleeding and 369 （2.1%） died in-hospital following PCI. Incidence of bleeding and in-hospital mortality increased monotonically with increasing age （mortality： 0.94%, 2.27%, 4.24% and 4.58%; bleeding： 3.96%, 6.62%, 10.68% and 13.99% for ages 〈 65, 65-4, 75-84 and ≥ 85 years, respectively）. On multivariate analysis, bleeding was associated with increased mortality for all age groups except patients age ≥85 years [odds ratio （95% CI）： age 〈 65 years, 3.65 （1.99-6.74）; age 65-74 years, 2.83 （1.62-4.94）; age 75-84 years, 3.86 （2.56-5.82）, age ≥ 85 years 1.39 （0.49-3.95）]. Conclusions bleeding and mortality following PCI increase with increasing age. For the very elderly, despite high rates of bleeding, bleeding is no longer predictive of in-hospital mortality following PCI.

关键词： Complications In-hospital mortality Percutaneous coronary intervention The elderly

Effect of 1Al addition on deformation behavior of Mg

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Journal of Magnesium and Alloys 2021年第2期9卷 489-498页

作者： Ji Hyun Hwang A.Zargaran Gyeongbae Park O.lee b.-J.lee Nack J.kim Center for Advanced Aerospace Materials Pohang University of Science and Technology(POSTECH)PohangSouth Korea

Deformation behavior of 1 Al containing Mg alloy has been investigated in the present *** annealing,the Mg-1 Al alloy shows a typical basal *** compared to the pure Mg having a similar texture and grain size,the Mg-1 Al alloy shows much higher strength and larger *** trace analyses of the tensile strained specimens show that non-basal slips such as pyramidal I and II slips can be easily activated at an early stage of deformation in the Mg-1 Al alloy and the grains in the Mg-1 Al alloy are seen to accommodate a larger degree of deformation than those in the pure Mg at a given *** increasing tensile strain,however,there is a strain localization along the initially formed slip lines of non-basal slips,forming surface steps without activating multiple slip lines.

关键词： Deformation behavior Slip trace analysis Non-basal slip Strain localization Ductility