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| 1 | Van der Waals ferroelectric transistors:the all-round artificial synapses for high-precision neuromorphic computing显示文摘State number,operation power,dynamic range and conductance weight update linearity are key synaptic device performance metrics for high-accuracy and low-power-consumption neuromorphic com-puting in hardware.However,high linearity and low power consump-tion couldn’t be simultaneously achieved by most of the reported synaptic devices,which limits the performance of the hardware.This work demonstrates van der Waals(vdW)stacked ferroelectric field-effect transistors(FeFET)with single-crystalline ferroelectric nanoflakes.Ferroelectrics are of fine vdW interface and partial polar-ization switching of multi-domains under electric field pulses,which makes the FeFETs exhibit multi-state memory characteristics and ex-cellent synaptic plasticity.They also exhibit a desired linear conduc-tance weight update with 128 conductance states,a sufficiently high dynamic range of G_(max)/G_(min)>120,and a low power consumption of 10 fJ/spike using identical pulses.Based on such an all-round device,a two-layer artificial neural network was built to conduct Modified Na-tional Institute of Standards and Technology(MNIST)digital num-bers and electrocardiogram(ECG)pattern-recognition simulations,with the high accuracies reaching 97.6%and 92.4%,respectively.The remarkable performance demonstrates that vdW-FeFET is of obvious advantages in high-precision neuromorphic computing applications. | Zhongwang Wang Xuefan Zhou Xiaochi Liu Aocheng Qiu Caifang Gao Yahua Yuan Yumei Jing Dou Zhang Wenwu Li Hang Luo Junhao Chu Jian Sun | 2023 | Chip2023，2，2： | 0 |
| 2 | Spatial-spectral identication of abnormal leukocytes based on microscopic hyperspectral imaging technology显示文摘Screening and diagnosing of abnormal Leukocytes are crucial for the diagnosis of immune diseases and Acute Lymphoblastic Leukemia(ALL).As the deterioration of abnormal leukocytes is mainly due to the changes in the chromatin distribution,which signicantly affects the absorption and reflection of light,the spectral feature is proved to be important for leukocytes classication and identication.This paper proposes an accurate identication method for healthy and abnormal leukocytes based on microscopic hyperspectral imaging(HSI)technology which combines the spectral information.The segmentation of nucleus and cytoplasm is obtained by the morphological watershed algorithm.Then,the spectral features are extracted and combined with the spatial features.Based on this,the support vector machine(SVM)is applied for classication ofve types of leukocytes and abnormal leukocytes.Compared with different classication methods,the proposed method utilizes spectral features which highlight the differences between healthy leukocytes and abnormal leukocytes,improving the accuracy in the classication and identication of leukocytes.This paper only selects one subtype of ALL for test,and the proposed method can be applied for detection of other leukemia in the future. | Xueqi Hu Jiahua Ou Mei Zhou Menghan Hu Li Sun Song Qiu Qingli Li Junhao Chu | 2020 | Journal of Innovative Optical Health Sciences2020，，2： | 0 |
| 3 | Thermoelectric Properties of n-type Full-Heusler Fe_(2-2x)Co_(2x) TiSn Prepared by an Ultra-fast Synthesis Process显示文摘Full-Heusler alloy Fe_(2)TiSn was predicted to be a potential thermoelectric material with high mechanical properties and stability.Fe_(2)TiSn was usually prepared by arc-melting followed by annealing for 2 weeks,which takes a long time and consumes a large amount of energy.In this paper,Fe_(2)TiSn was prepared by an ultra-fast method,self-propagating high-temperature synthesis (SHS) combined with spark plasma sintering.The bulk materials with uniform element distribution,well controlled composition and relative densities of over 97.5% were prepared.The undoped Fe_(2)TiSn samples show p-type transport behavior.Co was heavily doped at the Fe site to prepare n-type Fe_(2-2x)Co_(2x) TiSn samples.The thermoelectric properties measurements carried out on the Co-doped samples show a highest ZT=0.02 at 300 K,which is about tripe the performance of the pristine Fe_(2)TiSn.This study provides a new approach for the rapid and low-cost preparation of full-Heusler thermoelectric materials. | 赵东艳 陈艳宁 WANG Yubo ZHANG Haifeng FU Zhen WANG Shuaipeng YU Wen DU Jian WANG Wenhe QIU Junhao 鄢永高 | 2021 | Journal of Wuhan University of Technology(Materials Science)2021，36，4： | 0 |
| 4 | Tectonic Geochemical Characteristics and Ore Prediction in Hongdoushan Copper Deposit, Yunxian, Yunnan显示文摘South Lancangjiang metallogenic condition is superior,the volcanic arc metallogenic belt has been praised by geologists,the north district of Guanfang,Wenyu copper prospecting research has made important progress in recent years,the paper study in the Hongdoushan mountain copper deposit(the newly discovered deposits) | GUO Zehua WANG Lei HAN Runsheng WANG Jiasheng BAI Longan QIU Wenlong LIU Fei CUI Junhao TAN Wei | 2017 | Acta Geologica Sinica(English Edition)2017，91，S1： | 0 |
| 5 | Quantitative Analysis of Mineralization-Alteration Index about the Huize Lead-zinc district in Northeast Yunnan, China显示文摘1 Introduction The super-large Huize lead-zinc ore district is one of the most representative lead-zinc deposits in Northeastern Yunnan poly-metallic deposit concentration district.So far,studies(Liu and Lin,1999;Han et al.,2007)on the type of deposits like the Huize lead-zinc deposit,focused on deposit genesis,the sources of metallogenic materials, | ZHANG Xiaopei HAN Runsheng ZHAO Dong QIU Wenlong HE Jiaojiao CUI Junhao | 2017 | Acta Geologica Sinica(English Edition)2017，91，S1： | 0 |
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