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Knowledge-based neural network SPICE modeling for MOSFETs and its application on 2D material field-effect transistors

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Science China(Information Sciences) 2023年第2期66卷 227-236页

作者： Guodong QI Xinyu CHEN Guangxi HU Peng ZHOU Wenzhong BAO Ye LU State Key Laboratory of ASIC and System School of Information Science and TechnologyFudan University State Key Laboratory of ASIC and System School of Microelectronics Fudan University Zhangjiang Fudan International Innovation Center Fudan University

As the traditional scaling of silicon metal-oxide-semiconductor field-effect transistors(MOSFETs) reaches its physical limit, research efforts on novel semiconductor devices are increasingly desired. To enable the joint optimization of early-stage circuit design and process of novel devices, the rapid creation of an accurate compact model of these devices with the capability to cover process variations is required. In this work, a knowledge-based neural network(KNN) modeling method is proposed. This method separates the geometrical variables from the other input variables of the device, where the geometrical variables are modeled with physics-based analytical equations, while the remaining part is modeled by an artificial neural network. The KNN model takes advantage of the automated numerical fitting capability of the neural network and the geometrical scalability from device physics. The created KNN model is first validated with silicon MOSFET data from the industry standard BSIM6 and shows more than 20% accuracy improvement as compared with the traditional neural network model. Furthermore, MoS2field-effect transistors and circuits,such as ring oscillators, standard cells, and logic functional circuits, are experimentally fabricated for model verification. The results show that the KNN model is capable of predicting the electrical characteristics of devices beyond the measurement geometry and facilitates the accurate simulations of statistical circuits with respect to experimental data. This work paves the way for future circuit designs and simulations of novel semiconductor devices.

关键词： knowledge-based neural network MOSFET 2D material FETs Monte Carlo simulations circuit benchmark

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Design and Fabrication of Plasmonic Nanostructures with DNA for Surface-Enhanced Raman Spectroscopy Applications

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Chinese Journal of Chemistry 2016年第3期34卷 273-282页

作者： Chunbo Leng Cheng Wang Huixin Xiu Xiangmeng Qu Lizhen Chen Qian Tang Li Li school of Chemistry and Molecular Engineering East China Normal University Shanghai 200241 China Department of Nuclear Medicine Ren Ji Hospital School of Medicine Shanghai Jiao Tong University Shanghai 200127 China school of Materials Science andEngineering University of Shanghai for Science and Technology Shanghai 200093 China

Plasmonic nanostructures display unique and strongly enhanced optical properties, therefore hold great promise for a wide range of spectroscopic applications, particularly surface-enhanced Raman spectroscopy （SERS）. It is well acknowledged that the major contributions to SERS arise from molecules positioned in nanojunctions where the op- tical field is intensively concentrated due to localized surface plasmon excitations. One of the key challenges in SERS therefore lies in the design and fabrication of plasmonic nanostructures with controllable nanojunctions. In recent years, by exploiting the unparalleled base-pairing self-recognition properties, DNA-mediated assembly has emerged as a powerful and programmable tool for the accurate construction of complex and hierarchical plasmonic nanostructures with well-defined geometry and topology. In this review, we will summarize recent advances on de- sign and fabrication of a rich variety of plasmonic nanostructures by virtue of DNA nanotechnology, and discuss their optical properties as well as applications in SERS.

关键词： DNA nanotechnology DNA origami surface-enhanced Raman spectroscopy plasmonics

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Treatment of Practical Dye Wastewater Using a Double Dielectric Barrier Discharge System Combined with a Sequencing Batch Reactor System

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Journal of Donghua University(English Edition) 2015年第5期32卷 715-719页

作者：孙玉刘亚男薛罡高品李攀 school of Environmental Science and Engineering Donghua University school of Environmental Science and Engineering State Key Laboratory of Control and Resource Reuse Tongji University

Synthetic dyes are substances that are relatively stable and difficult to degrade in wastewater treatment plants using normal physical,chemical or / and biological treatment. The present work explored the synergistic effect of non-thermal plasma( NTP) and biological wastewater treatment technologies on practical dye wastewater degradation by establishing a double dielectric barrier discharge( DDBD) system combined with a sequencing batch reactor( SBR) system. The biodegradation and degradation efficiency of the DDBD-SBR system was investigated. The investigation results indicated that the DDBD technology was effective in treating the practical dye wastewater as a pre-treatment process. After a 10-min treatment,although the total organic carbon( TOC) removal efficiency was not so significant, the decolouration and the biodegradation were improved greatly. The microbial toxicity test revealed that the sample after degradation became less toxic than the original dye,which demonstrated the treatment had a significant effect on the reduction of toxicity. In addition,the SBR technology remedied the defects of DDBD treatment and improved TOC removal efficiency noticeably. The hybrid DDBD-SBR system made full use of the advantages of the individual technologies and exhibited an efficient capability for practical dye wastewater treatment.

关键词： practical dye wastewater decolouration biodegradation hybrid double dielectric barrier discharge-sequencing batch reactor(DDBD-SBR) system

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A new sight into the glass forming ability caused by doping on Ba-and Ti-site in BaTi_(2)O_(5) glass

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Journal of Materials Science & Technology 2020年第19期54卷 112-118页

作者： Hao Liu Xuan Ge Qiaodan Hu Fan Yang Jianguo Li Shanghai Key Laboratory of Materials Laser Processing and Modification School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China school of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

La-and Nb-doped BaTi_(2)O_(5)(BT2)spherical glasses were prepared by a containerless aerodynamic levitation method and their glass-forming regions were *** is found that La-doping on the Ba-site(network-modifier)and Nb-doping on the Ti-site(network-former)show distinct difference in the glassforming region:less than 10%La can replace Ba whereas 40%Nb can incorporate into BT2 *** distinction in glass-forming ability induced by La-and Nb-doping is discussed mainly from the structural arrangement of the *** spectroscopy analysis shows that La-doping elongates the short Ti-O bonds in the distorted[TiO_(5)]polyhedra and thus relaxes the ***-doping introduces[NbO_(6)]polyhedra into BT_(2) and there exists a critical doping level(20%),below which incorporation of Nb into BT_(2) relaxes the[TiOn]polyhedra by shortening the long Ti-O bond and above which[NbO_(6)]starts to participate in the network skeleton construction resulting in a dramatic change in the glass structure,which is supported by the dramatic change in the exothermic peak on the DTA *** work triggers the speculation that the network-modifiers in BT_(2) glass possess a very important role in the structure of network-former skeleton than those in glasses based on traditional network-former oxides such as SiO_(2),GeO_(2) and B_(2)O_(3),which may provide a useful strategy for modifying the properties of these novel glasses by chemical doping.

关键词： Glass forming ability BaTi_(2)O_(5)glass Doping Aerodynamic levitation Solidification

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Biomass‑Derived Carbon Materials for High‑Performance Supercapacitors:Current Status and Perspective

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Electrochemical Energy Reviews 2021年第2期4卷 219-248页

作者： Jiangqi Zhou Shilin Zhang Ya‑Nan Zhou Wei Tang Junhe Yang Chengxin Peng Zaiping Guo school of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina school of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China school of Mechanical MaterialsMechatronicand Biomedical EngineeringFaculty of Engineering and Information SciencesUniversity of WollongongWollongongNSW 2522Australia

Supercapacitors are electrochemical energy storage systems that depend on high-surface-area electrodes and can play a dominant role in areas that require high power delivery or *** of various electrodes,biomass-derived carbonaceous electrodes have recently shown impressive promise in high-performance supercapacitors because of their widespread availability,renewable nature and low-cost electricity *** on this,this review will discuss the current status of biomass-derived carbon materials in supercapacitors and highlight current research with a specific emphasis on the influences of structure and elemental doping on the electrochemical performance of corresponding carbon *** review will also discuss the gap between laboratory achievements and practical utilization in terms of these biomass-derived carbon materials and outline practical strategies for future improvement.

关键词： Biomass-derived carbonaceous Electrodes Structural engineering Doping effects Supercapacitors

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Bi_(0.15)Sr_(0.85)Co_(0.8)Fe_(0.2)O_(3-δ)perovskite:A novel bifunctional oxygen electrocatalyst with superior durability in alkaline media

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Journal of Materials Science & Technology 2022年第13期108卷 158-163页

作者： Jing Li Fan Yang Yunzhu Du Xiyang Cai Qiaodan Hu Junliang Zhang Institute of Fuel Cells School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China school of Materials Science&Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Oxygen evolution reaction(OER)and oxygen reduction reaction(ORR)play critical roles in renewable electrochemical energy conversion and storage devices,such as regenerative fuel cells and metal-air batteries[1-4].Up to date,precious metal-based catalysts,***-based materials for ORR,IrO_(2)/RuO_(2)-based catalysts for OER[5-7],lead the way in speeding up the sluggish reaction kinetics due to their high catalytic ***,the large-scale commercialization of these catalysts has been seriously restricted by their scarcity and high cost.

关键词： alkaline perovskite durability

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Core-shell nanostructure of single-wall carbon nanotubes and covalent organic frameworks for supercapacitors

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Chinese Chemical Letters 2017年第12期28卷 2269-2273页

作者： Yang Han Qin Zhang Nantao Hu Xue Zhang Yiyong Mai Jiaqiang Liu Xiaolin Hua Hao Wei Key Laboratorty for Thin Film and Microfabrication Technology of Ministry of Education School of Electronic Information and Electrical Engineering School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Department of Oral and Cranio-Maxillofacial Ninth People’s Hospital Xinhua Hospital Shanghai Jiao Tong University School of Medicine

Covalent organic frameworks （COFs） were nano-coated onto single-walled carbon nanotubes （SWCNTs） by in situ polymerization of TpPa-COFs together with SWCNTs under solvotherma] conditions. At the molecular level, the COF/SWCNT interface can be efficiently controlled. Thus, the TpPa-COF-SWCNTs nano-hybrid wire, which combines the excellent conductivity of SWCNTs and the high porosity and good redox activity of TpPa-COFs, was employed as active electrode materials for supercapacitors. The strategy reported in this work can give guidance for the design of other similar COF-based electrodes, and hold a great potential in energy storages

关键词： Covalent organic frameworks Supercapacitor Porous materialsn Energy storages Nano-hybrid wire

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Enhancing prime editing efficiency and flexibility with tethered and split pegRNAs

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Protein & Cell 2023年第4期14卷 304-308页

作者： Ying Feng Siyuan Liu Qiqin Mo Pengpeng Liu Xiao Xiao Hanhui Ma school of Biotechnology East China University of Science and TechnologyShanghai 200237China Gene Editing Center School of Life Science and TechnologyShanghaiTech UniversityShanghai 200135China Department of Molecular Cell and Cancer BiologyUniversity of Massachusetts Medical SchoolWorcesterMA O01655USA

Dear Editor,Most human genetic diseases arise from mutations such as insertion,deletion,or point mutations(Landrum et al.,2016).CRISPRCas system has been repurposed to correct pathogenic mutations in a variety of genetic diseases(Choi et al.,2022).There are many concerns about using CRISPR-mediated double-stranded DNA breaks(DSBs)for therapeutic purposes,primarily due to off-targeted mutations(Kosicki et al.,2018).Nevertheless,base editing cannot correct deletions,insertions,or some point mutations such as transversion *** editing has its advantages of precisely correct point mutations,small insertions,or deletions in animal cells(Anzalone et al.,2019)and plants(Lin et al.,2020).However,prime editing efficiency varies among genomic sites or cell types(Chen et al.,2021;Nelson et al.,2022).

关键词： insertion editing alone

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Better surgical treatment method for hepatocellular carcinoma with portal vein tumor thrombus

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World Journal of Gastroenterology 2018年第40期24卷 4527-4535页

作者： Shu-You Peng Xu-An Wang Cong-Yun Huang Jiang-Tao Li De-Fei Hong Yi-Fang Wang Bin Xu Department of Hepatobiliary and Pancreatic Surgery The Second Affiliated Hospital of Zhejiang University School of Medicine Department of General Surgery Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine Department of General Surgery Yuebei People's Hospital Affiliated to Shantou University School of Medicine Department of Hepatobiliary and Pancreatic Surgery Sir Run Run Shaw Hospital Affiliated Hospital of Zhejiang University School of Medicine

Hepatocellular carcinoma(HCC) with portal vein tumor thrombus(PVTT) is a disease that is not uncommon, but the treatments vary drastically between Eastern and Western countries. In Europe and America, the first line of treatment is systemic therapy such as sorafenib and the surgical treatment is not a recommend option. While an increasing number of studies from China and Japan have suggested that surgical treatment results in better outcomes when compared to transcatheter arterial chemoembolization(TACE), sorafenib, or other nonsurgical treatments, and two classification systems, Japanese Vp classification and Chinese Cheng's classification, were very useful to guide the surgical treatment. We have also found that surgical treatment may be more effective, as we have performed surgical treatment for HCC-PVTT patients over a period of approximately 15 years and achieved good results with the longest surviving time being 13 years and onward. In this study, we review the efficacy and principles of current surgical treatments and introduce our new, more effective surgical technique named "thrombectomy first", which means the tumor thrombus in the main portal vein, the bifurcation or the contralateral portal vein should be removed prior to liver resection. Thus, compression and crushing of PVTT during the operation could be avoided and new intrahepatic metastases caused by tumor thrombus to the remnant liver minimized. The new technique is even beneficial to the prognosis of Cheng's classification Types Ⅲ and Ⅳ PVTT. The vital tips and tricks for the surgical approach are described.

关键词： Portal vein tumor thrombus Thrombectomy first Surgery Hepatocellular carcinoma

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Size distribution of chemical elements and their source apportionment in ambient coarse, fine, and ultrafine particles in Shanghai urban summer atmosphere

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Journal of Environmental Sciences 2012年第5期24卷 882-890页

作者： Senlin Lu Rui Zhang Zhenkun Yao Fei Yi Jingjing Ren Minghong Wu Man Feng Qingyue Wang Shanghai Applied Radiation Institute School of Environmental and Chemical engineeringShanghai UniversityShanghai 201800China Graduate school of Science and Engineering Saitama University255 Shimo-OkuboSatura-KuSaitama CitySaitama 338–8570Japan

Ambient coarse particles （diameter 1.8-10 μm）, fine particles （diameter 0.1-1.8 μm）, and ultrafine particles （diameter 〈 0.1 μm） in the atmosphere of the city of Shanghai were sampled during the summer of 2008 （from Aug 27 to Sep 08）. Microscopic characterization of the particles was investigated by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy （SEM/EDX）. Mass concentrations of Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, Se, Br, Rb, Sr, and Pb in the size-resolved particles were quantified by using synchrotron radiation X-ray fluorescence （SRXRF）. Source apportionment of the chemical elements was analyzed by means of an enrichment factor method. Our results showed that the average mass concentrations of coarse particles, fine particles and ultrafine particles in the summer air were 9.38 ± 2.18, 8.82 ± 3.52, and 2.02 ± 0.41 μg/m3, respectively. The mass percentage of the fine particles accounted for 51.47% in the total mass of PM10, indicating that fine particles are the major component in the Shanghai ambient particles. SEM/EDX results showed that the coarse particles were dominated by minerals, fine particles by soot aggregates and fly ashes, and ultrafine particles by soot particles and unidentified particles. SRXRF results demonstrated that crustal elements were mainly distributed in the coarse particles, while heavy metals were in higher proportions in the fine particles. Source apportionment revealed that Si, K, Ca, Fe, Mn, Rb, and Sr were from crustal sources, and S, Cl, Cu, Zn, As, Se, Br, and Pb from anthropogenic sources. Levels of P, V, Cr, and Ni in particles might be contributed from multi-sources, and need further investigation.

关键词： airborne size-resolved particles chemical elements distribution source apportionment

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