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Hierarchical pomegranate-structure design enables stress management for volume release of Si anode

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Journal of Materials Science & Technology 2023年第26期157卷 1-10页

作者： Fang Di Zhenxing Wang Chong ge Lixiang Li Xin geng Chengguo Sun Haiming Yang Weimin Zhou Dongying Ju Baigang An Feng Li Key Laboratory of Energy Materials and Electrochemistry Liaoning Province School of Chemical EngineeringUniversity of Science and Technology LiaoningAnshan 114051China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China Hainan Provincial Key Lab of Fine Chemistry School of Chemical Engineering and TechnologyHainan UniversityHaikou 570228China Jihua Laboratory Guangdong ProvinceFoshan 528200China

Si is a promising anode material for lithium-ion batteries owing to its high theoretical ***-ever,large stress during(de)lithiation induces severe structural pulverization,electrical contact failure,and unstable solid-electrolyte interface,which hampers the practical application of Si ***,a Si-based anode with a hierarchical pomegranate-structure(HPS-Si)was designed to modulate the stress variation,and a sub-micronized Si-based sphere was assembled by the nano-sized Si nanospheres with sub-nanometer-sized multi-phase modification of the covalently linked SiO_(2-x),SiC,and *** sub-micronized HPS-Si stacked with Si nanospheres can avoid agglomerates during cycling due to the high surface energy of ***,the reasonable pore structure from SiO_(2) reduction owing to density difference is enough to accommodate the limited volume *** Si spheres with a size of about 50 nm can prevent ***_(2-x),and SiC as flexible and rigid layers,have been syner-gistically used to reduce the surface stress of conductive carbon layers to avoid *** covalent bonding immensely strengthens the link of the modification with Si nanospheres,thus resisting stress ***,a full cell comprising an HPS-Si anode and a LiCoO_(2) cathode achieved an energy density of 415 Wh kg^(-1) with a capacity retention ratio of 87.9%after 300 cycles based on the active *** is anticipated that the hierarchical pomegranate-structure design can provide inspiring insights for further studies of the practical application of silicon anode.

关键词： Stress management Silicon anode Hierarchical structure Covalent bonding Volume release

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云模型在高后果区管道风险评价的应用

油气田地面工程 2024年第8期43卷 39-45,51页

作者：耿向帅大庆油田有限责任公司第四采油厂

高后果区管道的识别和风险评价是完整性管理的重要环节,为提高这部分管道的风险管控水平,提出了一种基于综合权重-多维云模型的风险评价方法。采用改进AHP法和熵权法确定指标的主、客观权重,并基于最小鉴别原理对权重进行柔化;构造多维... 详细信息

高后果区管道的识别和风险评价是完整性管理的重要环节,为提高这部分管道的风险管控水平,提出了一种基于综合权重-多维云模型的风险评价方法。采用改进AHP法和熵权法确定指标的主、客观权重,并基于最小鉴别原理对权重进行柔化;构造多维云模型的数字特征,利用正向云发生器生成风险云图和隶属度;结合综合权重和单一指标隶属度,确定不同风险等级下的综合隶属度,进而获取待评价管道的风险等级。研究结果表明:地面活动程度、人为破坏、管内介质腐蚀速率的权重比例较大,是导致高后果区管道失效的主控因素;与未确知测度、模糊层次分析法和一维云模型相比,多维云模型的评价结果与现场实际的吻合性更高,可以准确、快速地判断高后果区管道风险水平。

关键词：高后果区管道多维云综合权重改进AHP 云发生器

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Video Polyp Segmentation: A Deep Learning Perspective

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Machine Intelligence Research 2022年第6期19卷 531-549页

作者： ge-Peng Ji Guobao Xiao Yu-Cheng Chou Deng-Ping Fan Kai Zhao geng Chen Luc Van Gool Research School of Engineering Australian National UniversityCanberra 2601Australia College of Computer and Control Engineering Minjiang UniversityFuzhou 350108China Department of Computer Science Johns Hopkins UniversityBaltimore 21218USA Computer Vision Laboratory ETH ZürichZürich 8092Switzerland Department of Radiological Sciences University of CaliforniaLos Angeles 90095USA School of Computer Science and Engineering Northwestern Polytechnical UniversityXi′an 710072China

We present the first comprehensive video polyp segmentation(VPS)study in the deep learning *** the years,developments in VPS are not moving forward with ease due to the lack of a large-scale dataset with fine-grained segmentation *** address this issue,we first introduce a high-quality frame-by-frame annotated VPS dataset,named SUN-SEG,which contains 158690colonoscopy video frames from the well-known *** provide additional annotation covering diverse types,i.e.,attribute,object mask,boundary,scribble,and ***,we design a simple but efficient baseline,named PNS+,which consists of a global encoder,a local encoder,and normalized self-attention(NS)*** global and local encoders receive an anchor frame and multiple successive frames to extract long-term and short-term spatial-temporal representations,which are then progressively refined by two NS *** experiments show that PNS+achieves the best performance and real-time inference speed(170 fps),making it a promising solution for the VPS ***,we extensively evaluate 13 representative polyp/object segmentation models on our SUN-SEG dataset and provide attribute-based ***,we discuss several open issues and suggest possible research directions for the VPS *** project and dataset are publicly available at https://***/gewelsJI/VPS.

关键词： Video polyp segmentation(VPS) dataset self-attention colonoscopy abdomen

A New Abeotaxane Diterpenoid from the Seeds of Taxus mairei

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Chinese Chemical Letters 2006年第1期17卷 27-30页

作者： man Li ZHANG Li geng LI Cong Mei CAO Zuo Ping LI Qing Wen SHI Hiromasa KIYOTA Department of Natural Product Chemistry School of Pharmaceutical Sciences Hebei Medical University Shijiazhuang 050017 Laboratory of Applied Bioorganic Chemistry Graduate School of Agricultural Science Tohoku University Sendal 981-8555 Japan

A new abeotaxane was isolated from the seeds of Taxus mairei. Its structure was determined to be 2α, 5α, 13α-trihydroxy-7β, 10β-diacetoxy-2（3→20） abeotaxa-4（20）, 11-dien-9- one on the basis of 1D and 2D spec... 详细信息

关键词： Taxaceae Taxus mairei taxane seeds.

Comprehensive overview of microRNA function in rheumatoid arthritis

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Bone Research 2023年第1期11卷 65-88页

作者： Xiaole Peng Qing Wang Wenming Li Gaoran ge Jiachen Peng Yaozeng Xu Huilin Yang Jiaxiang Bai Dechun geng Department of Orthopedics The First Affiliated Hospital of Soochow University188 Shizi StreetSuzhou215006JiangsuP.R.China Department of Orthopedics Affiliated Hospital of Zunyi Medical University563000ZunyiP.R.China

MicroRNAs(miRNAs),a class of endogenous single-stranded short noncoding RNAs,have emerged as vital epigenetic regulators of both pathological and physiological processes in *** direct fundamental cellular pathways and processes by fine-tuning the expression of multiple genes at the posttranscriptional *** evidence suggests that mi RNAs are implicated in the onset and development of rheumatoid arthritis(RA).RA is a chronic inflammatory disease that mainly affects synovial *** common autoimmune disorder is characterized by a complex and multifaceted pathogenesis,and its morbidity,disability and mortality rates remain consistently *** in-depth insights into the underlying mechanisms of RA are required to address unmet clinical needs and optimize ***,we comprehensively review the deregulated mi RNAs and impaired cellular functions in RA to shed light on several aspects of RA pathogenesis,with a focus on excessive inflammation,synovial hyperplasia and progressive joint *** review also provides promising targets for innovative therapies of *** addition,we discuss the regulatory roles and clinical potential of extracellular mi RNAs in RA,highlighting their prospective applications as diagnostic and predictive biomarkers.

关键词： impaired endogenous function

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喉接触性肉芽肿中医辨治医案2则

北京中医药 2024年第2期43卷 228-230页

作者：韩金帅闫新宇王曼王俊阁首都医科大学附属北京中医医院耳鼻咽喉科北京100010

喉接触性肉芽肿(laryngeal contact granuloma,LCG),亦称为非特异性肉芽肿、声带接触性肉芽肿、声带突肉芽肿,是一种肉芽增生性非特异性慢性炎症性病变[1-2],多以声嘶、发声疲劳、咽异物感为主要症状。研究[3]发现单纯手术切除病变组织... 详细信息

喉接触性肉芽肿(laryngeal contact granuloma,LCG),亦称为非特异性肉芽肿、声带接触性肉芽肿、声带突肉芽肿,是一种肉芽增生性非特异性慢性炎症性病变[1-2],多以声嘶、发声疲劳、咽异物感为主要症状。研究[3]发现单纯手术切除病变组织术后复发率超过90%。口服质子泵抑制剂等药物的保守治疗有用药周期长、患者依从性低、药物不良反应多等问题[4]。

关键词：喉接触性肉芽肿四证六病

PNPLA3 I148M variant in nonalcoholic fatty liver disease:Demographic and ethnic characteristics and the role of the variant in nonalcoholic fatty liver fibrosis

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World Journal of Gastroenterology 2015年第3期21卷 794-802页

作者： Li-Zhen Chen Yong-Ning Xin Ning geng man Jiang Ding-Ding Zhang Shi-Ying Xuan Department of Gastroenterology Qingdao Municipal Hospital Medical College of Qingdao University

Patatin-like phospholipase domain-containing 3(PNPLA3 or adiponutrin) displays anabolic and catabolic activities in lipid metabolism,and has been reported to be significantly associated with liver fat *** have established a strong link between the 148 isoleucine to methionine protein variant(I148M) of PNPLA3 and liver diseases,including nonalcoholic fatty liver disease(NAFLD).However,detailed demographic and ethnic characteristics of the I148 M variant and its role in the development of nonalcoholic fatty liver fibrosis have not been fully *** present review summarizes the current knowledge on the association between the PNPLA3 I148 M variant and NAFLD,and especially its role in the development of nonalcoholic fatty liver ***,we analyze the impact of demographic and ethnic characteristics of the PNPLA3 I148 M variant and the presence of metabolic syndrome on the association between PNPLA3 I148 M and ***,we explore the role of the PNPLA3 I148 M in the development of nonalcoholic fatty liver fibrosis,and hypothesize the underlying mechanisms by speculating a pro-fibrogenic ***,we briefly highlight future research that may elucidate the specific mechanisms of the PNPLA3 I148 M variant in fibrogenesis,which,in turn,provides a theoretical foundation and valuable experimental data for the clinical management of nonalcoholic fatty liver fibrosis.

关键词： PNPLA3 I148M variant Polymorphism Nonalcoholic fat

Improved Performance of Pentacene Organic Field-Effect Transistors by Inserting a V_(2)O_(5) Metal Oxide Layer

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Chinese Physics Letters 2011年第12期28卷 235-238页

作者： ZHAO geng CHENG Xiao-man TIAN Hai-Jun DU Bo-Qun LIANG Xiao-Yu School of Science Tianjin University of TechnologyTianjin 300384 Institute of Material Physics Key Laboratory of Display Material and Photoelectric Devices(Ministry of Education)and Tianjin Key Laboratory of Photoelectric Materials and DevicesTianjin University of TechnologyTianjin 300384

We fabricate pentacene-based organic field effect transistors(OFETs),inserting a transition metal oxide(V_(2)O_(5))layer between the pentacene and Al source−drain(S/D)*** performance of the devices with V_(2)O_(5)/Al S/D electrodes is considerably improved compared to the pentacene−based OFET with only Al S/D *** the 10-nm V2O5 layer modification,the effective field-effect mobility of the devices increases from 2.7×10^(−3) cm^(2)/V⋅s to 8.93×10−1 cm^(2)/V⋅*** to the change of the injection property,the effective threshold voltage(Vth)is changed from−7.5 V to−5 V and the on/off ratio shifts from 102 to ***,the dispersion of sub−threshold current in the devices *** performance improvements are ascribed to the low carrier injection barrier and the reduction of contact *** is indicated that V2O5 layer modification is an effective approach to improve pentacene-based OFET performance.

关键词： drain injection effect

超声辅助低共熔溶剂提取的鳞杯伞多糖的体外消化与酵解特性

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菌物学报 2024年第4期43卷 81-94页

作者：耿雪冉王无霞刘荣柱张德芳侯淑婷李泽辉葛广亮常明昌孟俊龙山西农业大学食品科学与工程学院山西太谷030801 黄土高原食用菌山西省重点实验室山西太谷030801 山西省食用菌工程技术研究中心山西太谷030801

本研究主要探讨体外消化与粪便发酵对超声辅助低共熔溶剂提取的鳞杯伞多糖(D-CSFP)的化学组成、结构特征和生物活性的影响。结果表明,经唾液-胃-肠消化后,D-CSFP的还原糖含量分别从0.44mg/mL上升到0.45、0.55和0.57mg/mL;分子量分别由35... 详细信息

本研究主要探讨体外消化与粪便发酵对超声辅助低共熔溶剂提取的鳞杯伞多糖(D-CSFP)的化学组成、结构特征和生物活性的影响。结果表明,经唾液-胃-肠消化后,D-CSFP的还原糖含量分别从0.44mg/mL上升到0.45、0.55和0.57mg/mL;分子量分别由35312Da降低到32090、25519和25473Da,但D-CSFP的官能团结构无明显改变。体外粪便发酵后,D-CSFP发酵液的OD600数值呈先增高后下降的趋势,为0.63→1.24→1.19;pH由6.75降低至6.13(P<0.05);总碳水化合物含量由8.59 mg/mL降低至5.05 mg/mL(P<0.05);总短链脂肪酸含量由1.83 mmol/L显著上升至11.15mmol/L(P<0.05)。16SrRNA测序结果显示:D-CSFP可有效促进有益菌(如Bacteroides、Prevotella和Dialister)的相对丰度,抑制有害菌(如Klebsiella)的繁殖。综上所述,D-CSFP可作为一种潜在功能性食品被充分开发利用。

关键词：鳞杯伞多糖消化与酵解短链脂肪酸肠道菌群