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Cir.ulation intensity and axial disper.ion of non-cohesive solid par.icles in a V-blender.via DEM simulation

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Par.icuology 2013年第6期11卷 619-626页

作者： Par.sa Tahvildar.an Far.ad Ein-Mozaffar. simant r.upreti Depar.ment of Chemical Engineer.ng Ryerson University

In this study, discr.te element method （DEM） was employed to simulate the movement of non-cohesive mono-disper.ed par.icles in a V-blender.along with par.icle-par.icle and par.icle-boundar. inter.ctions. To validate the model, DEM r.sults wer. successfully compar.d to positr.n emission par.icle tr.cking （PEPT） data r.por.ed in liter.tur.. The validated model was then utilized to explor. the effects of r.tational speed and fill level on cir.ulation intensity and axial disper.ion coefficient of non-cohesive par.icles in the V-blender. The r.sults showed that the cir.ulation intensity incr.ased with an incr.ase in the r.tational speed fr.m 15 to 60 r.m. As the fill level incr.ased fr.m 20% to 46%, the cir.ulation intensity decr.ased, r.ached its minimum value at a fill level of 34% for.all r.tational speeds, and did not change significantly at fill levels gr.ater.than 34%. The DEM r.sults also r.vealed that the axial disper.ion coefficient of par.icles in the V-blender.was a linear.function of the r.tational speed. These tr.nds wer. in good agr.ement with the exper.mentallv deter.ined values r.por.ed bv pr.vious r.sear.her..

关键词： Powder.mixing Discr.te element method Cir.ulation intensity Disper.ion coefficient V-blender

Chemometr.cs:A new scenar.o in her.al dr.g standar.ization

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Jour.al of Phar.aceutical Analysis 2014年第4期4卷 223-233页

作者： Ankit Bansal Vikas Chhabr. r.vindr. K.r.wal simant Shar.a Indo-Soviet Fr.endship(ISF) College of Phar.acy MogaPunjab 142001India

Chr.matogr.phy and spectr.scopy techniques ar. the most commonly used methods in standar.ization of her.al medicines but the her.al system is not easy to analyze because of their.complexity of chemical composition. Many cutting-edge analytical technologies have been intr.duced to evaluate the quality of medicinal plants and significant amount of measur.ment data has been pr.duced. Chemometr.c techniques pr.vide a good oppor.unity for.mining mor. useful chemical infor.ation fr.m the or.ginal data. Then, the application of chemometr.cs in the field of medicinal plants is spontaneous and necessar.. Compr.hensive methods and hyphenated techniques associated with chemometr.cs used for.extr.cting useful infor.ation and supplying var.ous methods of data pr.cessing ar. now mor. and mor. widely used in medicinal plants, among which chemometr.cs r.solution methods and pr.ncipal component analysis （PCA） ar. most commonly used techniques. This r.view focuses on the r.cent var.ous impor.ant analytical techniques, impor.ant chemometr.cs tools and inter.r.tation of r.sults by PCA, and applications of chemometr.cs in quality evaluation of medicinal plants in the authenticity, efficacy and consistency,

关键词： Chemometr.csHELP Her.al dr.gs PCA OPA

Elemental micr.-segr.gation char.cter.stic of fiber.laser.welded Hastelloy C-276 sheet

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Tr.nsactions of Nonfer.ous Metals Society of China 2018年第11期28卷 2237-2248页

作者： Kalinga simant BAL Jyotsna DUTTA MAJUMDAr.Asimava r.Y CHOUDHUr. Depar.ment of Mechanical Engineer.ng Indian Institute of TechnologyKharagpurWest Bengal 721302India Depar.ment of Metallur.ical ＆ Mater.als Engineer.ng Indian Institute of TechnologyKharagpurWest Bengal 721302India

The elemental micr.-segr.gation char.cter.stic within the weld zone for.ytter.ium fiber.laser.welded Hastelloy C-276sheet was investigated. The analysis of segr.gation r.tio and equilibr.um distr.bution coefficient of elements, deter.ined thr.ughEDS data, indicate the r.duction in micr.-segr.gation of elements compar.d with the pr.vious r.por.ed liter.tur.s for.laser.weldedHastelloy C-276. High melting efficiency of ytter.ium fiber.laser. r.duction in the amount of linear.heat input, and high cooling r.teof the mushy zone lead to the r.duction in micr.-segr.gation. The melting efficiency of ytter.ium fiber.laser.for.welding of HastelloyC-276 of 64% is higher.than that （48%） of conventional welding methods. High melting efficiency leads to the r.duction in the linear.eat input r.quir.d for.welding. Hence, in the pr.sent investigation, the same was found to substantially r.duce as compar.d to thepr.vious r.por.ed liter.tur.. The cooling r.te fr.m liquidus temper.tur. to solidus temper.tur. at the weld center.ine was found to bein the or.er.of 10^3℃/s. Cellular.dendr.tic substr.ctur. that constituted for.lower.micr.-segr.gation was for.ed at the weldcenter.ine.

关键词： Hastelloy C-276 alloy laser.welding fiber.laser micr.-segr.gation

Initial pr.sentation of acute myeloid leukemia in a patient with cutaneous myeloid sar.oma

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Inter.ational Jour.al of Der.atology and Vener.ology 2019年第1期2卷 56-58页

作者： simant Ankit Yi Sun Tong-Xiang Zeng Depar.ment of Der.atology and Vener.ology Jingzhou Central HospitalYangtze UniversityJingzhouHubei 434100China

Intr.duction Myeloid sar.oma is a r.r. malignancy,a tumor.mass of myeloblast or.immatur. myeloid cells occur.ing as an extr.medullar. tumor.often associated with or.following acute myeloid leukemia or.other.myeloid neoplasms but r.r.ly following *** is difficult to make a cor.ect diagnosis only based on clinical and histopathological findings in such cases due to its *** tr.atment is based on the type of acute myeloid *** the pr.sent study,a r.r. case of cutaneous myeloid sar.oma associated with acute myeloid leukemia is r.por.ed,which may help to enhance the under.tanding of this disease.

关键词： Initial pr.sentation cutaneous under.tanding

磁共振血管造影与数字减影血管造影在脑血管狭窄闭塞性疾病诊断中的比较研究(英文)

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东南大学学报（医学版） 2013年第6期32卷 655-662页

作者： simant Mehta 邓刚东南大学附属中大医院放射科江苏南京210009

目的:对比研究磁共振血管造影(Mr.)(1.5、3.0 T)与数字减影血管造影(DSA)对于脑血管狭窄闭塞性疾病诊断及量化的作用。方法:回顾性研究110例临床怀疑患有脑血管病变的受试病人,其中55例行1.5 T Mr.扫描(3D TOF序列),另55例行3.0 T Mr.(3... 详细信息

目的:对比研究磁共振血管造影(Mr.)(1.5、3.0 T)与数字减影血管造影(DSA)对于脑血管狭窄闭塞性疾病诊断及量化的作用。方法:回顾性研究110例临床怀疑患有脑血管病变的受试病人,其中55例行1.5 T Mr.扫描(3D TOF序列),另55例行3.0 T Mr.(3D TOF序列)扫描。在最大密度投影重建像及常规DSA图像下测定脑血管狭窄程度,以北美有症状颈动脉内膜切除试验标准为参考。结果:对于脑血管狭窄的分级,1.5 T、3.0 T Mr.与DSA结果一致率分别为86.5%、90.5%。在诊断明确后,1.5 T Mr.敏感度及特异度分别为90%、98%;阳性预测值(PPV)及阴性预测值(NPV)分别为87%、99%;总准确率为94%。同时,3.0 T Mr.敏感度及特异度分别为92%、99%,PPV及NPV分别为91%、99%,准确率为96%。对于脑血管狭窄闭塞疾病的测定,DSA与1.5 T Mr.(P=0.31)、3.0 T Mr.(P=0.30)差异均无统计学意义,1.5 T Mr.与3.0 T Mr.之间差异亦无统计学意义(P=0.70)。结论:本实验结果表明,对于脑血管狭窄闭塞性疾病的诊断Mr.的3 D TOF序列能够作为DSA之外的一种可靠的诊断方法,且3.0 T Mr.稍优于1.5 T Mr.。

关键词：磁共振血管造影数字减影血管造影最大密度投影重建北美有症状颈动脉内膜切除试验标准闭塞狭窄

The Cur.ent Tr.atment and Pr.vention of Post Her.etic Neur.lgia

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Yangtze Medicine 2018年第1期2卷 28-38页

作者： simant Ankit Tongxiang Zeng Yangxin Chen Har. Nar.yan Gupta Kunal Shah Xianwang Wang Depar.ment of Der.atology & Vener.ology Jingzhou Central Hospital & The Second Clinical School of Medicine Yangtze University Jingzhou China Depar.ment of Der.atology & Vener.ology Tribhuvan University Kathmandu Nepal Labor.tor. of Oncology Center for Molecular Medicine School of Medicine Yangtze University Jingzhou China

Post her.etic neur.lgia (PHN) is a chr.nic neur.pathic pain syndr.me in the ar.a of the her.es zoster.(HZ) r.sh, per.isting after.the cutaneous lesions have subsided. Despite numer.us tr.atment advances, many patients r.main r.fr.ctor. to the cur.ent ther.pies and continue to have pain, physical, economical and psychological distr.ss. In this r.view, we will focus on the cur.ent tr.atment and pr.vention of PHN.

关键词： Post Her.etic Neur.lgia Cur.ent Tr.atment Pr.vention