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Few-layer Ti_(3)CN MXene for ultrafast photonics applications in visible band

Journal of Materiomics 2023年第1期9卷 44-55页

作者： Zixin Yang Qi Yang Yulin Tian Xianghe Ren Chun Li Yuqian Zu Syed Zaheer ud din Lingfeng Gao Jian Wu Hualong Chen Han Zhang Jie Liu Jingliang He Abdullah GAl-Sehemi International School for Optoelectronic Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan250353China College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of Edu-cationHangzhou Normal UniversityHangzhou311121China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha410073China Institute of Microscale Optoelectronics College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China Shandong Provincial Engineering and Technical Center of Light Manipulations and Shandong Provincial Key Laboratory of Optics and Photonic Device chool of Physics and ElectronicsShandong Normal UniversityJinan250358China State Key Laboratory of Crystal Materials Shandong UniversityJinan250100China Research Center for Advanced Materials Science(RCAMS) King Khalid UniversityAbha61413Saudi Arabia Department of Chemistry College of ScienceKing Khalid UniversityAbha61413Saudi Arabia

Ti_(3)CN,as a typical hetero-MXene,has attracted tremendous attention for its unique ***,its ultrafast photonics applications are still ***,the few-layer Ti_(3)CN MXene was successfully prepared by selective etching and molecular delamination *** nonlinear optical response of few-layer Ti_(3)CN MXene at 640 nm was studied using the open-aperture Z-scan *** asprepared Ti_(3)CN MXene sample exhibited excellent nonlinear saturable absorption characteristics,resulting in the nonlinear absorption coefficient b of4.05×10^(-2)cm/GW,which was one order of magnitude larger than that of black phosphorus(BP)and molybdenum disulfide(MoS_(2)).For the optical modulation applications of few-layer Ti_(3)CN MXene,passively Q-switched(PQS)solid-state visible lasers based on Ti_(3)CN saturable absorber(SA)at 522 nm,607 nm,639 nm,and 721 nm were successfully ***,a Ti_(3)CN-based stable passively mode-locked Pr:YLF red laser was also successfully achieved with a pulse duration of 30 ps,and the corresponding repetition rate was 73.1 *** optical modulation device based on few-layer Ti_(3)CN MXene shows good *** work demonstrates that the tremendous prospects of the few-layer Ti_(3)CN MXene as a visible optical modulation device in ultrafast photonics applications.

关键词： Ti_(3)CN MXene Z-scan Saturable absorber Optical modulator Pulsed visible lasers

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High-Bandwidth,Low-Power CMOS Transistor Based CAB for Field Programmable Analog Array

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Computers, Materials & Continua 2023年第3期74卷 5885-5900页

作者： Ameen Bin Obadi Alaa El-din Hussein Samir Salem Al-Bawri kabir Hossain Abdullah Abdulhameed Muzammil Jusoh Thennarasan Sabapathy Ahmed Jamal Abdullah Al-Gburi Mahmoud A.Albreem Advanced Communication Engineering(ACE) Centre of ExcellenceUniversiti Malaysia Perlis(UniMAP)Faculty of Electronic Engineering TechnologyKangar01000Malaysia Electrical Engineering King Fahd University of Petroleum and MineralsDhahranEastern31261Saudi Arabia Space Science Centre Climate Change InstituteUniversiti Kebangsaan MalaysiaBangi43600Malaysia Department of Electronics&Communication Engineering Faculty of Engineering&PetroleumHadhramout UniversityAl-MukallaHadhramout50512Yemen Faculty of Engineering Norwegian University of Science and Technology(NTNU)GjovikN-2815Norway Faculty of Electronic Engineering Technology Universiti Malaysia Perlis(UniMAP)Kampus Alam UniMAP Pauh PutraArau02600Malaysia Department of General Educational Development Faculty of Science and Information Technology(FSIT)Daffodil International UniversityDhaka1207Bangladesh Department of Electronics and Computer Engineering(FKEKK) Center for Telecommunication Research and Innovation(CeTRI)Universiti Teknikal Malaysia Melaka(UTeM)Durian Tungal76100Malaysia Department of Electrical Engineering University of SharjahSharjah27272United Arab Emirates

This article presents an integrated current mode configurable analog block(CAB)system for field-programmable analog array(FPAA).The proposed architecture is based on the complementary metal-oxide semiconductor(CMOS)transistor level design where MOSFET transistors operating in the saturation region are *** proposed CAB architecture is designed to implement six of thewidely used current mode operations in analog processing systems:addition,subtraction,integration,multiplication,division,and pass *** functionality of the proposed CAB is demonstrated through these six operations,where each operation is chosen based on the user’s selection in the CAB interface *** architecture of the CAB system proposes an optimized way of designing and integrating only three functional cells with the interface circuitry to achieve the six ***,optimized programming and digital tuning circuitry are implemented in the architecture to control and interface with the functional ***,these designed programming and tuning circuitries play an essential role in optimizing the performance of the proposed *** of the proposed CMOS Transistor Based CAB system is carried out using Tanner EDA Tools in 0.35μm standard CMOS *** design uses a±1.5 V power supply and results in maximum 3 dB bandwidth of 34.9 MHz and an approximate size of 0.0537 *** demonstrates the advantages of the design over the current state-of-the-art designs presented for comparison in this ***,the proposed design has a clear aspect of simplicity,low power consumption,and high bandwidth operation,which makes it a suitable candidate for mobile telecommunications applications.

关键词： CMOS field programmable analog array configurable analog block current mode circuit

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Common Fixed Point Iterations of Generalized Asymptotically Quasi-Nonexpansive Mappings in Hyperbolic Spaces

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Journal of Applied Mathematics and Physics 2014年第5期2卷 170-175页

作者： A. R. Khan H. Fukhar-ud-din Department of Mathematics and Statistics King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia

We introduce a general iterative method for a finite family of generalized asymptotically quasi- nonexpansive mappings in a hyperbolic space and study its strong convergence. The new iterative method includes multi-step iterative method of Khan et al. [1] as a special case. Our results are new in hyperbolic spaces and generalize many known results in Banach spaces and CAT(0) spaces, simultaneously.

关键词： Hyperbolic Space General Iterative Method Generalized Asymptotically Quasi-Nonexpansive Mapping Common Fixed Point Strong Convergence

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基于RELAP5的CFETR氦冷陶瓷增殖包层模块热工安全分析

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原子能科学技术 2017年第10期51卷 1778-1784页

作者：汪键宋云涛雷明准刘素梅郭超徐坤 Salah ud-din Khan 中国科学技术大学核科学技术学院安徽合肥230022 中国科学院等离子体物理研究所安徽合肥230031

本文对中国聚变工程实验堆(CFETR)氦冷陶瓷增殖(HCCB)包层进行热工安全分析。采用大型反应堆瞬态分析程序RELAP5对HCCB包层建模,并进行稳态分析和假设事故的模拟。计算结果表明,CFETR HCCB包层在真空室内氦气泄漏和增殖区盒内氦气泄漏... 详细信息

本文对中国聚变工程实验堆(CFETR)氦冷陶瓷增殖(HCCB)包层进行热工安全分析。采用大型反应堆瞬态分析程序RELAP5对HCCB包层建模,并进行稳态分析和假设事故的模拟。计算结果表明,CFETR HCCB包层在真空室内氦气泄漏和增殖区盒内氦气泄漏事故中均未出现结构材料熔化,同时各部分的压强变化情况均未超出设计阈值,包层系统在事故发生后均能有效快速地排出余热。CFETR HCCB包层的设计满足热工安全方面的要求。

关键词： RELAP5 中国聚变工程实验堆氦冷包层模块热工安全事故

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还原氧化石墨烯微观结构调控及储钠性能研究

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石油化工高等学校学报 2023年第6期36卷 48-56,I0002页

作者：盛大伟 HASEEB ud din 张济原刘晓旭陕西科技大学材料科学与工程学院陕西西安710021

开发高效的碳基钠离子电池(SIBs)负极材料是目前的研究热点。采用不同退火温度,使预还原后的氧化石墨烯(GO)获得具有不同层间距的波浪状还原氧化石墨烯(rGO)谱,并将其应用于SIBs负极,通过优化电解液,探究了rGO微观结构与储钠性能、储钠... 详细信息

开发高效的碳基钠离子电池(SIBs)负极材料是目前的研究热点。采用不同退火温度,使预还原后的氧化石墨烯(GO)获得具有不同层间距的波浪状还原氧化石墨烯(rGO)谱,并将其应用于SIBs负极,通过优化电解液,探究了rGO微观结构与储钠性能、储钠机制的关系。经过调谐层间距并与电导率权衡后,rGO负极在醚类电解液中通过插层和溶剂化Na+共吸附的储钠机制,在SIBs中显示出较高的首次库伦效率(82%),经过100次循环后容量保持率高达93%,说明rGO负极具有优异的循环稳定性。

关键词：还原氧化石墨烯钠离子电池负极层间距

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Erroneous transcript can trigger generation of siRNA by recruiting RdRP in Caenorhabditis elegans

Erroneous transcript can trigger generation of siRNA by recr...

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第九届全国核糖核酸学术讨论会

作者： Farees ud din mufti 光寿红中国科学技术大学

RNA dependentRNA Polymerase（Rd RP）is an important component for si RNA amplifications in RNAi silencing *** can function as a catalytic subunit of replicase machinery during the exogenous and endogenous secondary si RNA *** previous work showed that 3`polyuridylated 26S rRNA can stimulate antisense ribosome si RNA biogenesis by Rd RP,but the mechanism of how does Rd RP trigger erroneous RNA transcripts to produce si RNA is still poorly *** transgenic system in Caenorhabditis elegans address essential advancements and limitations to define targets and chromosomal translocations in ***,we construct Rd RP transgene by Mos SCI/CRISPR Cas9 method to investigate how Rd RP recognize the 3`terminus of erroneous RNA and trigger small RNA biogenesis.

关键词： RdRP siRNA amplification erroneous RNA transcripts

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High Frequency Plant Regeneration from Leaf Derived Callus of Dianthus caryophyllusL.

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American Journal of Plant Sciences 2014年第15期5卷 2454-2463页

作者： Muhammad Arif Saima Rauf Aziz ud din Mamoona Rauf Humera Afrasiab Department of Botany University of the Punjab Quaid-e-Azam Campus Lahore Pakistan Department of Genetics Hazara University Garden Campus Mansehra Pakistan Institute of Agricultural Sciences University of the Punjab Lahore Pakistan National Institute for Biotechnology and Genetic Engineering Faisalabad Pakistan

An efficient procedure was developed for in vitro callus induction, proliferation and regeneration of carnation cultivar (Dianthus caryophyllus L.) using leaf, nodal and inter-nodal explants on Murashige and Skoog’s medium (MS) supplemented with exogenous plant growth regulators. For morphogenic callus induction and proliferation from various explants, MS medium supplemented with 3.0 mg/l 2,4-D was highly efficient with 100% callus induction frequency from inter-nodal explants. Leaf explants showed quicker response than nodal and inter-modal explants, for callus initiation within 6 days of inoculation. Best grown callus was obtained from leaf explant. The leaf-derived callus was maintained up to several weeks, which indicated that 8-week incubation period was the most suitable for obtaining well proliferated, morphogenic callus. Temperature variation also affected the growth of in vitro induced morphogenic callus from various explants. Results have shown that 27°C proved to be the best temperature for morphogenic callus induction and proliferation from leaf and inter-nodal explants. Among the auxin-cytokinin combination, MS medium containing 1.0 mg/l N(6)-benzylaminopurin (BAP) and 2.0 mg/l NAA showed the highest efficiency of callus initiation and proliferation from leaf, nodal and inter-nodal explants. Light conditions proved better for callogenesis and proliferation from leaf, nodal and inter-nodal explants. Regeneration response from well grown morphogenic callus was prominent on MS medium supplemented with 3.0 mg/l BAP alone and 1.0 mg/l NAA with 3.0 mg/l BAP.

关键词： Dianthus caryophyllus L. Regeneration Potential Plant Growth Regulators Morphogenic Callus Induction

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Electrical Transport Properties of Bi2O3-Doped CoFe2O4and CoHo0.02Fe1.98O4Ferrites

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Materials Sciences and Applications 2011年第8期2卷 1083-1089页

作者： Hasan Mehmood Khan Misbah-ul Islam Irshad Ali Mazhar-ud-din Rana Department of Physics Bahauddin Zakariya University Multan Pakistan -60800

Two series of CoHoxFe2-x O4 (x = 0.0,0.02) ferrites with Bismuth oxide doping from (0.1-0.3)% were prepared by Co-precipitation technique. X-ray diffraction analysis revealed fcc structure. The lattice constants were found to decrease as the doping of Bi2O3increases in both series. An increase in Bismuth oxide concentration from (0.1-0.3%) in CoFe2O4, and CoHo0.02Fe1.98O4ferrites leads to an increase in room temperature resistivity. Temperature dependent resistivity decreases as the temperature increases following the Arrhenius equation. The activation energy increases with the increase of Bi2O3-concentration for both CoFe2O4 and CoHo0.02Fe1.98O4series. The frequency dependant dielectric constant follows the Maxwell-Wagner type interfacial polarization. The dielectric loss indicates the normal behavior of these ferrites. SEM analysis shows an increase in grain size with increasing Bismuth concentration.

关键词： Cobalt Ferrites Co-Precipitation Bi Doping Electrical Properties

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放电等离子烧结制备Mg2-xNdxNi(x=0～0.3)储氢合金

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北京科技大学学报 2011年第8期33卷 986-994页

作者：李平万琦 din Rafi-ud 谢东辉曲选辉北京科技大学材料科学与工程学院北京100083 北京北冶功能材料有限公司北京100192 北京市先进粉末冶金材料与技术重点实验室北京100083

采用放电等离子烧结(SPS)工艺制备了Mg2-xNdxNi(x=0,0.1,0.2,0.3)储氢合金.通过X射线衍射(XRD)和扫描电镜(SEM)研究了合金的相结构和表面形貌,利用等容压差法分析测试了合金的压力--组成--温度(PCT)曲线和吸放氢动力学性能,研究了烧结... 详细信息

采用放电等离子烧结(SPS)工艺制备了Mg2-xNdxNi(x=0,0.1,0.2,0.3)储氢合金.通过X射线衍射(XRD)和扫描电镜(SEM)研究了合金的相结构和表面形貌,利用等容压差法分析测试了合金的压力--组成--温度(PCT)曲线和吸放氢动力学性能,研究了烧结温度、稀土元素Nd对储氢合金微观组织结构和储氢性能的影响,比较了SPS技术与真空感应熔炼法制备的Mg基合金组织结构和储氢性能的异同.结果表明:SPS制备的Mg2-xNdxNi(x=0～0.3)系列储氢合金具有多相结构,储氢合金的吸放氢动力学性能良好;Nd元素有利于Mg合金化,不利于储氢量;烧结温度对储氢量、PCT曲线平台性能有明显影响;当Mg2-xNdxNi系合金中含有Mg和NdMg12相,PCT曲线出现双平台现象;与铸态合金相比,SPS制备的Mg1.7Nd0.3Ni储氢合金的吸放氢动力学性能较好,但储氢容量、放氢率和PCT曲线平台性能更差.

关键词：储氢合金镁合金放电等离子烧结(SPS) 储氢微观组织稀土

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Frequency of Hemorrhoidal Complaints in a Real-Life Population and Possible Concomitance between Hemorrhoidal Disease and Chronic Venous Disease: Going Further in Our Understanding of Hemorrhoidal Disease

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Surgical Science 2021年第9期12卷 319-331页

作者： Sheikh Firoj kabir Debasish Das Kazi Zana Alam Mahbub Murshed din Mohammad Department of Surgery US Bangla Medical College Narayanganj Bangladesh Department of Surgery Enam Medical College & Hospital Savar Bangladesh Department of Surgery Sylhet M.A.G. Osmani Medical College & Hospital Sylhet Bangladesh Department of Surgery Mainamoti Medical College & Hospital Cumilla Bangladesh Department of Surgery Shaheed Suhrawardy Medical College and Hospital Dhaka Bangladesh

Introduction: Hemorrhoids, more commonly known as piles, are swollen veins, similar to varicose veins in the lower rectum. Hemorrhoids can develop both inside and outside the rectum, and oftentimes, the cause of hemorrhoids remains unknown. This is an extremely common ailment faced by three out of four adults in their lifetime. Hemorrhoids can cause various kinds of complications, but the most common and serious ones are perianal thrombosis and incarcerated prolapsed internal hemorrhoids with subsequent thrombosis. They are accompanied by severe pain in the perianal region, and possible bleeding. Data on the coexistence of hemorrhoids with other conditions are sparse. Some data are consistent with a common pathophysiological link between straining at stool, constipation, and obstetrical events such as pregnancy and delivery. These events are also involved in the development of Chronic Vein Disease (CVD) or Chronic Vein Insufficiency (CVI). CVI is a condition that occurs when the venous walls or valves in the leg veins stop working properly, causing difficulty in blood returning to the heart from the legs. The present study was conducted with an aim to determine the frequency of complaints in hemorrhoidal patients and to assess the possible concomitance between hemorrhoidal disease and chronic venous disease. Methods: This was a multicenter, cross-sectional, observational study that enrolled patients spontaneously consulting for hemorrhoids in 17 different hospitals of different regions of Bangladesh from<

关键词： Hemorrhoidal Complaints Chronic Venous Disease Frequency

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