资源类型

期刊论文 825

年份

2024 2

2023 73

2022 75

2021 78

2020 78

2019 74

2018 62

2017 58

2016 49

2015 63

2014 55

2013 19

2012 26

2011 15

2010 12

2009 13

2008 14

2007 14

2006 4

2005 6

展开 ︾

关键词

人工智能 3

医院中子照射器I型堆 3

COVID-19 2

临床试验 2

交通 2

免疫球蛋白G 2

对策 2

现状 2

神经网络 2

肠道菌群 2

&alpha 1

(GaxIn1−x)2O3薄膜；带隙可调谐；磁控溅射 1

/III-V界面 1

10kV高压电力电缆 1

2-羟基丁酸 1

3D打印 1

802.11i 1

Aphanomyces euteiches 1

Heterodera glycines 1

展开 ︾

检索范围：

排序： 展示方式：

A systematic approach in load disaggregation utilizing a multi-stage classification algorithm for consumer electrical appliances classification

Chuan Choong YANG, Chit Siang SOH, Vooi Voon YAP

《能源前沿（英文）》 2019年 第13卷 第2期   页码 386-398 doi: 10.1007/s11708-017-0497-z

摘要： The potential to save energy in existing consumer electrical appliances is very high. One of the ways to achieve energy saving and improve energy use awareness is to recognize the energy consumption of individual electrical appliances. To recognize the energy consumption of consumer electrical appliances, the load disaggregation methodology is utilized. Non-intrusive appliance load monitoring (NIALM) is a load disaggregation methodology that disaggregates the sum of power consumption in a single point into the power consumption of individual electrical appliances. In this study, load disaggregation is performed through voltage and current waveform, known as the - trajectory. The classification algorithm performs cropping and image pyramid reduction of the - trajectory plot template images before utilizing the principal component analysis (PCA) and the -nearest neighbor ( -NN) algorithm. The novelty of this paper is to establish a systematic approach of load disaggregation through - trajectory-based load signature images by utilizing a multi-stage classification algorithm methodology. The contribution of this paper is in utilizing the “ -value,” the number of closest data points to the nearest neighbor, in the -NN algorithm to be effective in classification of electrical appliances. The results of the multi-stage classification algorithm implementation have been discussed and the idea on future work has also been proposed.

关键词： load disaggregation     voltage-current (V-I) trajectory     multi-stage classification algorithm     principal component analysis (PCA)     k-nearest neighbor (k-NN)    

HTML PDF 收藏

Accounting for the uncertainties in the estimation of average shear wave velocity using – correlations

《结构与土木工程前沿（英文）》 2021年 第15卷 第5期   页码 1199-1208 doi: 10.1007/s11709-021-0749-1

摘要： Site-specific seismic hazard analysis is crucial for designing earthquake resistance structures, particularly in seismically active regions. Shear wave velocity ( V S) is a key parameter in such analysis, although the economy and other factors restrict its direct field measurement in many cases. Various V S–SPT– N correlations are routinely incorporated in seismic hazard analysis to estimate the value of V S. However, many uncertainties question the reliability of these estimated V S values. This paper comes up with a statistical approach to take care of such uncertainties involved in V S calculations. The measured SPT– N values from all the critical boreholes were converted into statistical parameters and passed through various correlations to estimate V S at different depths. The effect of different soil layers in the boreholes on the Vs estimation was also taken into account. Further, the average shear wave velocity of the top 30 m soil cover ( V S30) is estimated after accounting for various epistemic and aleatoric uncertainties. The scattering nature of the V S values estimated using different V S– N correlations was reduced significantly with the application of the methodology. Study results further clearly demonstrated the potential of the approach to eliminate various uncertainties involved in the estimation of V S30 using general and soil-specific correlations.

关键词： uncertainties     V S– N correlations     V S30     SPT data     statistical methodology    

HTML PDF 收藏

大豆胞囊线虫抗性研究现状及其对大豆育种的启示 Review

Guiping Yan,Richard Baidoo

《工程（英文）》 2018年 第4卷 第4期   页码 534-541 doi: 10.1016/j.eng.2018.07.009

摘要：

大豆胞囊线虫（SCN，Heterodera glycines）是危害全球大豆生产最严重的线虫。作物轮作和培育抗线虫品种是防治线虫的主要方法。随着越来越多能够克服常用抗源的毒性SCN 群体出现，有必要寻找更多新的抗源或拓宽抗性遗传背景。本文综述了大豆抗SCN 基因的研究进展，以及这些基因如何相互作用，从而使大豆能够抗SCN。本文还提供了最新分子作图和分子标记，可用于不同抗性品系和品种的大规模选择和鉴定，以加速常规育种计划。深入了解SCN 寄生蛋白和大豆对病原体的抗性是通过基因修饰、基因叠加、回交或基因工程引入新的抗源而使抗源多样化的关键。

关键词： 大豆胞囊线虫     <i>Heterodera glycinesi>     抗性     分子育种    

HTML PDF 收藏

Elasto-plastic fatigue crack growth analysis of plane problems in the presence of flaws using XFEM

SHEDBALE,I. V. SINGH,B. K. MISHRA

《结构与土木工程前沿（英文）》 2015年 第9卷 第4期   页码 420-440 doi: 10.1007/s11709-015-0305-y

摘要： In this paper, elasto-plastic XFEM simulations have been performed to evaluate the fatigue life of plane crack problems in the presence of various defects. The stress-strain response of the material is modeled by Ramberg-Osgood equation. The von-Mises failure criterion has been used with isotropic hardening. The -integral for two fracture modes (mode-I and mode-II) is obtained by decomposing the displacement and stress fields into their symmetric and antisymmetric parts, then individual stress intensity factors are extracted from -integral. The fatigue life obtained by EPFM is found quite close to that obtained by LEFM.

关键词： XFEM     von-Mises yield criterion     isotropic hardening     fatigue crack growth     J-integral    

HTML PDF 收藏

Development of a new method for RMR and Q classification method to optimize support system in tunneling

Asghar RAHMATI,Lohrasb FARAMARZI,Manouchehr SANEI

《结构与土木工程前沿（英文）》 2014年 第8卷 第4期   页码 448-455 doi: 10.1007/s11709-014-0262-x

摘要： Rock mass classification system is very suitable for various engineering design and stability analysis. classification method is confirmed by Japan Highway Public Corporation that this method can figure out either strength or deformability of rock mass, further appropriating the amount of rock bolts, thickness of shotcrete, and size of pitch of steel ribs just after the blasting procedure. Based on these advantages of method, in this study, according to data of five deep and long tunnels in Iran, two equations for estimating the value of method from and classification systems were developed. These equations as a new method were able to optimize the support system for and classification systems. From classification and its application in these case studies, it is pointed out that the method for the design of support systems in underground working is more reliable than the and classification systems.

关键词： JH classification     Q and RMR classification     new method    

HTML PDF 收藏

抗白粉病基因 <i>Pm40i> 在我国“后 <i>Pm21i> 时代”小麦育种中的重要作用 Perspective

唐圣雯,胡玉亭,钟胜福,罗培高

《工程（英文）》 2018年 第4卷 第4期   页码 500-506 doi: 10.1016/j.eng.2018.06.004

摘要：

由小麦白粉菌[Blumeria graminis f. sp. tritici（Bgt）] 引起的小麦白粉病是一种重要的小麦叶部病害，对小麦的产量产生很大的影响。20 世纪80 年代，通过簇毛麦（Heuchera villosa）的6VS 染色体与小麦6AL 染色体易位将抗白粉病基因Pm21 转移到普通小麦中。最近，在一些地方发现了对Pm21 有毒的Bgt，虽然这些菌株的病理学特性还有待研究，但这一现象提醒小麦育种者应注意应用Pm21 的风险。来源于普通小麦与中间偃麦草（Thinopyrum intermedium）杂种后代的抗白粉病基因Pm40，被定位在小麦7BS 染色体上，对Bgt 具有广谱和持久的抗性。通过细胞学研究，并未在Pm40 的载体品种中发现大片段外缘染色体。过去几年的研究发现，Pm40 的载体品种具有优良的农艺性状。因此，我们相信在未来的育种工程中，Pm40 将会在Pm21 的抗性被克服之后起巨大的作用。另外，Pm21 和Pm40 都来源于外缘物种，这暗示着外源基因的抗性可能比小麦本身的基因更为持久和有效。

关键词： 小麦     白粉病     <i>Pm21i>     <i>Pm40i>     外源基因     内源抗性    

HTML PDF 收藏

Role of Akkermansia muciniphila in the development of nonalcoholic fatty liver disease: current knowledge

《医学前沿（英文）》 2022年 第16卷 第5期   页码 667-685 doi: 10.1007/s11684-022-0960-z

摘要： Nonalcoholic fatty liver disease (NAFLD) is a hepatic manifestation of metabolic syndrome and a common cause of liver cirrhosis and cancer. Akkermansia muciniphila (A. muciniphila) is a next-generation probiotic that has been reported to improve metabolic disorders. Emerging evidence indicates the therapeutic potential of A. muciniphila for NAFLD, especially in the inflammatory stage, nonalcoholic steatohepatitis. Here, the current knowledge on the role of A. muciniphila in the progression of NAFLD was summarized. A. muciniphila abundancy is decreased in animals and humans with NAFLD. The recovery of A. muciniphila presented benefits in preventing hepatic fat accumulation and inflammation in NAFLD. The details of how microbes regulate hepatic immunity and lipid accumulation in NAFLD were further discussed. The modulation mechanisms by which A. muciniphila acts to improve hepatic inflammation are mainly attributed to the alleviation of inflammatory cytokines and LPS signals and the downregulation of microbiota-related innate immune cells (such as macrophages). This review provides insights into the roles of A. muciniphila in NAFLD, thereby providing a blueprint to facilitate clinical therapeutic applications.

关键词： Akkermansia muciniphila     NAFLD     NASH     steatosis     inflammation    

HTML PDF 收藏

Novel method for the preparation of Cs-containing FAU(Y) catalysts for aniline methylation

Shaposhnik, Marina V. Belova, Boris A. Kolozhvari, Irina I. Ivanova

《化学科学与工程前沿（英文）》 2018年 第12卷 第1期   页码 70-76 doi: 10.1007/s11705-017-1694-3

摘要： Cs-containing FAU(Y)-type zeolite catalysts were prepared by conventional and novel ion exchange procedures followed by incipient wetness impregnation with CsOH. The novel ion exchange procedure involved hydrothermal treatment of NaY zeolite in aqueous solution of CsCl at 140–200 °C for 6–24 h. The samples were characterized by low-temperature nitrogen adsorption, X-ray fluorescence analysis, X-ray powder diffraction, scanning electron microscopy, Na, Al and Cs magic angle spinning nuclear magnetic resonance, CO and NH -Temperature programmed desorption. The results show that hydrothermal treatment at 200 °C allows to obtain higher degrees of ion-exchange (up to 83%) with respect to conventional method giving maximum 66%–69%. Catalytic properties of Cs-containing FAU(Y) were studied in aniline methylation. The yield of -methylaniline is shown to correlate with catalyst’s basicity. The best catalyst performance was achieved over the catalyst with the highest ion-exchange degree impregnated with CsOH. The selectivity to -methylaniline over this catalyst reached 96.4%.

关键词： FAU(Y) zeolite     ion exchange with cesium     aniline alkylation     N-methylaniline    

HTML PDF 收藏

注射大鼠脑神经膜的非洲爪蟾卵母细胞——一种创新的体外方法研究拟除虫菊酯对天然态离子通道的影响 Review

John Clark, Steve Symington

《工程（英文）》 2020年 第6卷 第5期   页码 515-521 doi: 10.1016/j.eng.2019.10.017

摘要：

将大鼠脑神经膜微移植到非洲爪蟾卵母细胞的质膜中，是一种利用标准电生理学方式研究其天然态通道和受体的体外方法。在本文中，我们发现注射了成年大鼠脑神经膜的卵母细胞会引发对河豚毒素敏感的膜去极化内向离子流，经除虫菊酯类杀虫剂氯菊酯和溴氰菊酯处理后，该电流呈浓度依赖性增加。根据我们最初的方案，随着时间的推移，卵母细胞的健康水平会降低，不同批次的不同蛙类卵母细胞间与神经膜的结合程度也不同，这限制了该试验在调控问题上的实用性。对分析程序、数据接受标准和分析方法的一系列更改可显著提高试验的精度，从而提高性能。这些变化促使这种体外方法成为一种毒理学相关分析方法，以研究拟除虫菊酯对取自幼年和成年大鼠脑中的神经膜片段的离子通道的毒性作用。

关键词： 微移植     拟除虫菊酯     大鼠脑神经膜     毒效动力学     电压敏感钠离子通道     非洲爪蟾    

HTML PDF 收藏

NiFeRuO<i>xi> nanosheets on Ni foam as an electrocatalyst for efficient

《化学科学与工程前沿（英文）》 2023年 第17卷 第11期   页码 1698-1706 doi: 10.1007/s11705-023-2334-8

摘要： The electrocatalyst NiFeRuOx/NF, comprised of NiFeRuOx nanosheets grown on Ni foam, was synthesized using a hydrothermal process followed by thermal annealing. NiFeRuOx/NF displays high electrocatalytic activity and stability for overall alkaline seawater splitting: 98 mV@ 10 mA∙cm−2 in hydrogen evolution reaction, 318 mV@ 50 mA∙cm−2 in oxygen evolution reaction, and a cell voltage of 1.53 V@ 10 mA∙cm−2, as well as 20 h of durability. A solar-driven system containing such a bifunctional NiFeRuOx/NF has an almost 100% Faradaic efficiency. The NiFeRuOx coating around Ni foam is an anti-corrosion layer and also a critical factor for enhancement of bifunctional performances.

关键词： NiFeRuOx nanosheets     Ni foam     electrocatalysis     overall seawater splitting     solar-driven system    

HTML PDF 收藏

2014—2016年食品动物源RE-<i>cmeABCi>阳性弯曲菌流行与耐药性现状 Article

刘德俊, 刘蔚雯, 李星, 姚红, 沈张奇, 汪洋, 沈建忠

《工程（英文）》 2020年 第6卷 第1期   页码 34-39 doi: 10.1016/j.eng.2019.10.013

摘要：

弯曲菌是引起人类胃肠炎的一类重要食源性致病菌。RE-CmeABC是近年来弯曲菌中新发现的一种增强型耐药外排泵，可介导对兽医和人医临床治疗弯曲菌感染的重要药物，如氟喹诺酮类、酰胺醇类、大环内酯类及四环素类等药物的高水平耐药，而目前尚未有对该外排泵的大范围流行病学调查。因此，本研究调查了2014—2016年连续三年间我国山东、上海和广东等三个重点养殖区食品动物源RE-cmeABC阳性弯曲菌的流行与耐药性现状。结果显示，在1088株弯曲菌（931株结肠弯曲菌与157株空肠弯曲菌）中共检测出122株（11.2%）RE-cmeABC阳性菌株，包括111株（70.7%）空肠弯曲菌与11株（1.2%）结肠弯曲菌，空肠弯曲菌中RE-cmeABC的阳性率显著高于结肠弯曲菌。111株RE-cmeABC阳性空肠弯曲菌与46株RE-cmeABC阴性空肠弯曲菌相比在氟苯尼考、克林霉素和红霉素的耐药率上具有显著差异（P < 0.05），而在环丙沙星、四环素和庆大霉素的耐药率上无显著差异。然而，携带RE-cmeABC的菌株可以使环丙沙星与四环素对弯曲菌的MIC值分布趋于更高水平范围。脉冲场凝胶电泳分型（PFGE）结果显示RE-cmeABC阳性菌株在上海和广东地区以水平传播为主，在山东地区以克隆传播为主；三株分离于上海和广东的阳性菌为同一克隆型，4株分离于上海和山东的阳性菌为同一克隆型。本研究表明RE-cmeABC已在我国食品动物源弯曲菌中广泛流行，对公共卫生安全具有潜在威胁。

关键词： RE- <i> cmeABC i>     弯曲菌     环丙沙星     氟苯尼考    

HTML PDF 收藏

A highly efficient methodology for the preparation of

Yongxin Zhang, Shucheng Wang, Yaodong Huang

《化学科学与工程前沿（英文）》 2021年 第15卷 第3期   页码 679-686 doi: 10.1007/s11705-020-1979-9

摘要： A convenient and highly efficient method is described for the synthesis of -methoxycarbazole derivatives, including those with sterically demanding, benzannulated, or strongly electron-donating or -withdrawing substituents. Various -methoxycarbazole derivatives were directly prepared in good-to-moderate yields by the Pd (dba) CHCl /9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene-catalyzed reactions of the corresponding dibromobiphenyl compounds and methoxya-mine. Based on this methodology, the first total synthesis of 3,3′-[oxybis(methylene)]bis(9-methoxy-9 -carbazole), an antimicrobial dimeric carbazole alkaloid previously isolated from the stem bark of , was achieved in 18% yield over seven steps from 1,2-dibromobenzene.

关键词： N-methoxyl carbazole     dimeric N-methoxyl carbazole     alkaloid     total synthesis     double N-arylation of methoxyamine    

HTML PDF 收藏

通过<i> B i>位Ta置换对<i> AB i> O4型EuNbO4的热学和力学性质进行优化 Article

陈琳, 冯晶

《工程（英文）》 2020年 第6卷 第2期   页码 177-184 doi: 10.1016/j.eng.2019.12.006

摘要：

铁弹性的ABO4型RETaO4陶瓷和RENbO4陶瓷（RE表示稀土）是具有潜在应用价值的热障涂层（TBC）材料，研究人员正在对其进行大量研究。结果显示， RETaO4陶瓷的力学性质优于RENbO4陶瓷的力学性质。在本研究中，我们通过B位钽（Ta）置换对利用固相法（SSR）制备的EuNbO4陶瓷的热学和力学性质进行优化。我们使用X射线衍射（XRD）法和拉曼光谱技术对所制备的晶体结构进行确认，并利用扫描电子显微镜（SEM）对结构表面的微观形貌进行观察。结果表明，通过B位Ta置换可以有效提高EuNbO4陶瓷的杨氏模量和热膨胀系数（TEC），且其最大值分别为169 GPa和1.12×10−5 K−1（1200 ℃）； EuNbO4陶瓷的热导率被降低至1.52 W·K–1·m–1（700 ℃），且材料的抗热辐射能力得到了改善。我们建立了声子热扩散系数与温度之间的关系，用以通过消除热辐射效应来确定声子本征热导率。研究结果表明，通过B位Ta置换能够有效优化EuNbO4的热学和力学性质，从而使得此种材料在将来可成为一种高温结构陶瓷材料。

关键词： 热障涂层，稀土铌酸盐，置换，热导率，热膨胀系数，杨氏模量    

HTML PDF 收藏

Traces and echoes of <i>De Architecturai> by Marcus Vitruvius Pollio in the work of Xu Guangqi in 17th

Michela CIGOLA,Yibing FANG

《机械工程前沿（英文）》 2016年 第11卷 第1期   页码 3-11 doi: 10.1007/s11465-015-0359-5

摘要：

This study aims to investigate the role played by Xu Guangqi (1562–1633), minister of the Ming Dynasty, in the development of European scientific and technical knowledge in China between the 16th and 17th centuries by analyzing a book of Western technology that he wrote, namely, Taixi Shuifa (On Western Hydraulics). Several Western books related to machine knowledge are searched to trace the source of the illustrations in Taixi Shuifa. We found that Archimedes’ screw and Ctesibius’ machine, which are included in Vitruvius’ De Architectura volumes, also appear in the work of Xu Guangqi.

关键词： Vitruvius’ De Architectura     Xu Guangqi’s Taixi Shuifa     Jesuit missionaries     Italian Renaissance     drawing     representation    

HTML PDF 收藏

<i>RR1i> and <i>RR2i> gene deletion affects the immunogenicity of a live attenuated pseudorabies

Shijun YAN,He YAN,Chaolin ZHANG,Tongyan WANG,Qingyuan YANG,Zhe SUN,Yan XIAO,Feifei TAN,Xiangdong LI,Kegong TIAN

《农业科学与工程前沿（英文）》 2016年 第3卷 第1期   页码 81-86 doi: 10.15302/J-FASE-2016088

摘要： As virulence-determining genes, and encode the small subunit and large subunit of viral ribonucleotide reductase (RR) in pseudorabies virus which have been extensively studied in mice. However, their role in pigs has not been adequately investigated. In this study, we deleted and genes based on a / / triple gene-deleted pseudorabies virus and tested its efficacy in pigs as a vaccine candidate. The rescued virus showed similar growth properties and plaque size as its parent strain. In an animal study, the virus could elicit humoral immune responses shown by generation of gB-specific antibodies and virus neutralizing antibodies. However, vaccination could not provide protection against virulent pseudorabies virus challenge since vaccinated pigs showed clinical pseudorabies-specific syndromes. The deficiency in protection may due to the generation of late and low levels of gB antibodies and virus neutralizing antibodies.

关键词： pseudorabies virus     RR1 and RR2     ribonucleotide reductase     vaccine candidate    

HTML PDF 收藏

标题 作者 时间 类型 操作

A systematic approach in load disaggregation utilizing a multi-stage classification algorithm for consumer electrical appliances classification

Chuan Choong YANG, Chit Siang SOH, Vooi Voon YAP

期刊论文

Accounting for the uncertainties in the estimation of average shear wave velocity using – correlations

期刊论文

大豆胞囊线虫抗性研究现状及其对大豆育种的启示

Guiping Yan,Richard Baidoo

期刊论文

Elasto-plastic fatigue crack growth analysis of plane problems in the presence of flaws using XFEM

SHEDBALE,I. V. SINGH,B. K. MISHRA

期刊论文

Development of a new method for RMR and Q classification method to optimize support system in tunneling

Asghar RAHMATI,Lohrasb FARAMARZI,Manouchehr SANEI

期刊论文

抗白粉病基因 <i>Pm40i> 在我国“后 <i>Pm21i> 时代”小麦育种中的重要作用

唐圣雯,胡玉亭,钟胜福,罗培高

期刊论文

Role of Akkermansia muciniphila in the development of nonalcoholic fatty liver disease: current knowledge

期刊论文

Novel method for the preparation of Cs-containing FAU(Y) catalysts for aniline methylation

Shaposhnik, Marina V. Belova, Boris A. Kolozhvari, Irina I. Ivanova

期刊论文

注射大鼠脑神经膜的非洲爪蟾卵母细胞——一种创新的体外方法研究拟除虫菊酯对天然态离子通道的影响

John Clark, Steve Symington

期刊论文

NiFeRuO<i>xi> nanosheets on Ni foam as an electrocatalyst for efficient

期刊论文

2014—2016年食品动物源RE-<i>cmeABCi>阳性弯曲菌流行与耐药性现状

刘德俊, 刘蔚雯, 李星, 姚红, 沈张奇, 汪洋, 沈建忠

期刊论文

A highly efficient methodology for the preparation of

Yongxin Zhang, Shucheng Wang, Yaodong Huang

期刊论文

通过<i> B i>位Ta置换对<i> AB i> O4型EuNbO4的热学和力学性质进行优化

陈琳, 冯晶

期刊论文

Traces and echoes of <i>De Architecturai> by Marcus Vitruvius Pollio in the work of Xu Guangqi in 17th

Michela CIGOLA,Yibing FANG

期刊论文

<i>RR1i> and <i>RR2i> gene deletion affects the immunogenicity of a live attenuated pseudorabies

Shijun YAN,He YAN,Chaolin ZHANG,Tongyan WANG,Qingyuan YANG,Zhe SUN,Yan XIAO,Feifei TAN,Xiangdong LI,Kegong TIAN

期刊论文