检索结果-南通市图书馆

A Bio-Inspired Integration Model of Basal Ganglia and Cerebellum for Motion Learning of a Musculoskeletal Robot

Journal of Systems Science & Complexity 2024年第1期37卷 82-113页

作者： ZHANG Jinhan chen jiahao ZHONG Shanlin QIAO Hong State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China.

It is a significant research direction for highly complex musculoskeletal robots that how to develop the ability of motion learning and *** cooperations of multiple brain regions are crucial to improving motion *** by the neural mechanisms of structures,functions,and interconnections of basal ganglia and cerebellum,a biologically inspired integration model for motor learning of musculoskeletal robots is *** on the neural characteristics of the basal ganglia,the basal ganglia actor network,which mainly simulates the dorsal striatum,outputs motion commands,and the basal ganglia critic network,which simulates the ventral striatum,estimates actionstate *** network parameters are updated using the soft actor-critic *** on the sensorimotor prediction mechanism of the cerebellum,the cerebellum network evaluates the state feature extraction quality of the basal ganglia actor network and then updates the weights of its feature *** learning method is proven to converge to the optimal ***,drawing on the mechanism of dopaminergic dynamic regulation in the basal ganglia,the adaptive adjustment of target entropy and the dopaminergic experience replay are proposed to further improve the integration model,which contributes to the exploration-exploitation trade-off of motor *** bio-inspired integration model is validated on a musculoskeletal *** results indicate that this model can effectively control the musculoskeletal robot to accomplish the motion task from random starting locations to random target positions with high precision and robustness.

关键词： Basal ganglia and cerebellum bio-inspired integration model motion learning musculoskeletal robot reinforcement learning.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Anti-JPEG Compression Steganography Based on the High Tense Region Locating Method

引用

Computers, Materials & Continua 2019年第4期59卷 199-214页

作者： Yang Wu Weiping Shang jiahao chen State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou450002China School of Telecommunications Engineering Xidian UniversityXi’an710071China Zhuhai Campus of Beijing Normal University Zhuhai519000China

Robust data hiding techniques attempt to construct covert communication in a lossy public ***,the existing robust JPEG steganographic algorithms cannot overcome the side-information missing ***,this paper proposes a new robust JPEG steganographic algorithm based on the high tense region location method which needs no side-information of lossy ***,a tense region locating method is proposed based on the Harris-Laplacian feature ***,robust cover object generating processes are ***,the advanced embedding cost function is proposed.A series of experiments are conducted on various JPEG image sets and the results show that the proposed steganographic algorithm can resist JPEG compression efficiently with acceptable performance against steganalysis statistical detection libraries GFR(Gabor Filters Rich model)and DCTR(Discrete Cosine Transform Residual).

关键词： Robust data hiding steganography JPEG compression resistant Harris-Laplacian feature

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A dilute fluorine-free electrolyte design for high-voltage hybrid aqueous batteries

引用

Journal of Energy Chemistry 2023年第2期77卷 180-190,I0005页

作者： Rui Lin jiahao chen Changming Ke Shi Liu Jianhui Wang School of Materials Science&Engineering Zhejiang UniversityHangzhou 310024ZhejiangChina Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024ZhejiangChina Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhou 310024ZhejiangChina Key Laboratory for Quantum Materials of Zhejiang Province Department of PhysicsSchool of ScienceWestlake UniversityHangzhou 310030ZhejiangChina Institute of Natural Sciences Westlake Institute for Advanced StudyHangzhou 310024ZhejiangChina

Fluorinated salts and/or high salt concentrations are usually necessary to produce protective films on the electrodes for high-voltage aqueous batteries,yet these approaches increase the cost,toxicity and reaction resistances of ***,we report a dilute fluorine-free electrolyte design to overcome this *** using the LiClO_(4) salt and polyethylene glycol dimethyl ether(PED)solvent and optimizing the LiClO_(4)/PED/H_(2)O molar ratio,we formulate a 1 mol kg^(-1)3 V-class hybrid aqueous electrolyte that enables reversible charge/discharge of 2.5 V LiMn_(2)O_(4)|Li_(4)Ti_(5)O_(12) full cell at both low(0.5C,92.4%capacity retention in 300 cycles)and high(5C,80.4%capacity retention in 2000 cycles)*** excellent performance is reached even without the generation of protective film on either anode or cathode as identified by in/ex situ *** selection of appropriate ingredients that have both high stability and strong interactions with water is critical to widen the potential window of electrolyte while suppressing parasitic reactions on the *** work suggests that expensive and toxic fluorinate salts are no longer necessary for 3 V-class aqueous electrolytes,boosting the development of low-cost,environmentally-friendly,high-power and high-energy-density aqueous batteries.

关键词： High-voltage hybrid aqueous batteries Fluorine-free electrolyte design Interphase chemistry Polyethylene glycol dimethyl ether

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microstructure and texture evolution of a near β titanium alloy Ti-7333 during continuous cooling hot deformation

引用

Progress in Natural Science:Materials International 2019年第1期29卷 50-56页

作者： jiahao chen Jinshan Li Bin Tang Yi chen Hongchao Kou State Key Laboratory of Solidification Processing Northwestern Polytechnical University Key Construction Laboratory of Green Forming and Equipment from Jiangsu Province Jiangsu University of Technology

The microstructure and texture evolution during continuous cooling hot deformation(CCHD) in a near β titanium alloy, named Ti-7Mo-3Nb-3Cr-3Al(Ti-7333), were investigated by using the electron backscattered diffraction(EBSD). The results indicate that the precipitation of secondary α phase was restricted by CCHD, and the morphology of primary α phase nearly had no change with the deformation and temperature drop. In contrast, βphase underwent more deformation and the grains tended to refine. This may be due to the dynamic recrystallization(DRX) of β phase, including continuous dynamic recrystallization(CDRX) and discontinuous dynamic recrystallization(DDRX). In addition, the textures of {110} , {225} and{115} transformed to {100} and {001} during CCHD. Among these, the η-fiber component of {001} was the dominant deformation texture in the deformed Ti-7333 alloy. Finally,continuous cooling has an important effect on the work hardening and softening during CCHD, contributing to the different flow behaviors at different cooling rates.

关键词： Near β titanium alloy Thermo-mechanical processing Texture Dynamic recrystallization

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Recent developments on catalytic membrane for gas cleaning

引用

Chinese Journal of Chemical Engineering 2019年第6期27卷 1391-1402页

作者： jiahao chen Zhaoxiang Zhong Yongsheng Xia Xuebin Ke Weihong Xing State Key Laboratory of Materials-Oriented Chemical Engineering National Engineering Research Center for Special Separation MembraneNanjing Tech UniversityNanjing 210009China Faculty of Science and Engineering School of Engineering and Computer ScienceUniversity of HullHU67RXUnited Kingdom

Catalytic membrane, a novel membrane separation technology that combines catalysis and separation, exhibits significant potential in gas purification such as formaldehyde, toluene and nitrogen oxides(NO_x). The catalytic membrane can remove solid particles through membrane separation and degrade gaseous pollutants to clean gas via a catalytic reaction to achieve green emissions. In this review, we discussed the recent developments of catalytic membranes from two aspects: preparation of catalytic membrane and its application in gas *** membranes are divided into organic catalytic membranes and inorganic catalytic membranes depending on the substrate materials. The organic catalytic membranes which are used for low temperature operation(less than 300 °C) are prepared by modifying the polymers or doping catalytic components into the polymers through coating, grafting, or in situ growth of catalysts on polymeric membrane. Inorganic catalytic membranes are used at higher temperature(higher than 500 °C). The catalyst and inorganic membrane can be integrated through conventional deposition methods, such as chemical(physical) vapor deposition and wet chemical deposition. The application progress of catalytic membrane is focused on purifying indoor air and industrial exhaust to remove formaldehyde, toluene, NO_x and PM2.5, which are also summarized. Perspectives on the future developments of the catalytic membranes are provided in terms of material manufacturing and process optimization.

关键词： Catalytic membranes Gas cleaning Membrane Catalysts

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Molecular and atomic manipulation of metal-organic framework-derived LiCoMnO_(4):An oxygen-deficient strategy for advanced lithium storage

引用

Journal of Energy Chemistry 2022年第12期75卷 216-228,I0006页

作者： Jian-En Zhou jiahao chen Xiaoke Zhang Akif Zeb Xiaoming Lin Guangzhou Key Laboratory of Materials for Energy Conversion and Storage Key Laboratory of Theoretical Chemistry of EnvironmentMinistry of EducationSchool of ChemistrySouth China Normal UniversityGuangzhou 510006GuangdongChina

As a novel class of high-voltage cathode materials,spinel lithium transition metal oxides have been faced with demerits including pronounced structural instability caused by Jahn-Teller distortion(especially at the lower voltage region)and severe capacity degradation despite their intriguing electrochemical *** extend their functionalities as broad-voltage cathodes,the sacrificial template method has been regarded as a promising way to realize structural and compositional control for desirable electrochemical ***,we report a synthetic protocol to directionally prepare Li Co Mn O_(4)(LCMO)using carboxyl-based metal-organic frameworks(MOFs)as self-sacrificing ***,LCMO derived from Co Mn-BDC(H_(2)BDC=1,4-benzenedicarboxylate)displays superior electrochemical performances with a specific capacity of 151.6 m Ah g^(-1)at 1 C(150 m A g^(-1))after 120 cycles and excellent rate capacity of 91.9 m Ah g^(-1)at 10 C due to the morphology control,microstructural modulation,and atomic manipulation of the MOF *** by the optimized atomic and electronic structure,abundant oxygen vacancies,and the nanostructure retained from MOF precursors,LCMO materials display extraordinary electrochemical properties,which have been extensively verified by both experimental and theoretical *** work not only provides guidelines for the directional design of spinel materials at molecular and atomic levels but also sheds light on the practical use of LIBs with broad range voltage.

关键词： Lithium-ion battery Cathode MOFs LiCoMnO_(4) Controllable synthesis Atomic manipulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A cross-species co-functional gene network underlying leaf senescence

引用

Horticulture Research 2023年第1期10卷 288-298页

作者： Moyang Liu Chaocheng Guo Kexuan Xie Kai chen jiahao chen Yudong Wang Xu Wang Shanghai Collaborative Innovation Center of Agri-Seeds/School of Agriculture and Biology Shanghai Jiao Tong UniversityShanghai 200240China Joint Center for Single Cell Biology School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China

The complex leaf senescence process is governed by various levels of transcriptional and translational *** features of the leaf senescence process are similar across species,yet the extent to which the molecular mechanisms underlying the process of leaf senescence are conserved remains *** used experimental approaches permit the identification of individual pathways that regulate various physiological and biochemical processes;however,the large-scale regulatory network underpinning intricate processes like leaf senescence cannot be built using these ***,we discovered a series of conserved genes involved in leaf senescence in a common horticultural crop(Solanum lycopersicum),a monocot plant(Oryza sativa),and a eudicot plant(Arabidopsis thaliana)through analyses of the evolutionary relationships and expression patterns among *** analyses revealed that the genetic basis of leaf senescence is largely conserved across *** also created a multi-omics workf low using data from more than 10000 samples from 85 projects and constructed a leaf senescence-associated co-functional gene network with 2769 conserved,high-confidence ***,we found that the mitochondrial unfolded protein response(UPR^(mt))is the central biological process underlying leaf ***,UPR^(mt) responds to leaf senescence by maintaining mitostasis through a few cross-species conserved transcription factors(***13)and metabolites(***).The co-functional network built in our study indicates that UPR^(mt) figures prominently in cross-species conserved ***,the results of our study provide new insights that will aid future studies of leaf senescence.

关键词： network functional conserved

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Public Administration Studies:The Disputes of Dichotomy Between Politics and Administration

引用

学术界 2010年第4期 271-275页

作者： chen jiahao School of Government,Peking University

Woodrow Wilson’s 1887 essay,"The Study of Administration," published in Political Science Quarterly,is "generally regarded as the beginning of public administration as a specific field of study".1This essay catapults Wilson into the forefront of authorities in the *** is also credited with positing the existence of a major distinction between politics and administration,which provides the rationale for publ

关键词： Wilson Public Administration Studies

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Evaluation of freeze-thaw erosion in Tibet based on the cloud model

引用

Frontiers of Earth Science 2021年第3期15卷 495-506页

作者： Junfu FAN Taoying HU Xiao YU jiahao chen Liusheng HAN Yuke ZHOU School of Architectural Engineering Shandong University of TechnologyZibo 255000China Bureau of Natural Resources Shiquan 725200China Ecology Observing Network and Modeling Laboratory Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Freeze-thaw erosion can lead to accelerated soil loss,which is an important factor related to soil erosion in cold *** is a typical region that is seriously affected by freeze-thaw ***,the analytic hierarchy process(AHP)method is used to calculate the weight of the factors in evaluations of freeze-thaw erosion,but this method cannot accurately depict the fuzziness and randomness of the *** overcome this disadvantage,this study proposed an improved AHP method based on the cloud model for the evaluation of the factors impacting freeze-thaw *** establish an improved evaluation method for freeze-thaw erosion in Tibet,the following six factors were selected:mean annual air temperature,mean annual ground surface temperature,average annual precipitation,aspect,vegetation coverage,and topographic *** traditional AHP and the cloud model were combined to assign the weights of the impacting factors,and a consistency check was *** comprehensive evaluation index model was used to evaluate the intensity of freeze-thaw erosion in *** results show that freeze-thaw erosion is extensive,stretching over approximately 66.1%of ***,mild erosion and moderate erosion are the most widely distributed erosion intensity levels,accounting for 36.4%and 34.4%of the total freeze-thaw erosion,*** intensity of freeze-thaw erosion gradually increased from slight erosion in the northwest to severe erosion in the southeast of the study *** evaluation results for the intensity and distribution of freeze-thaw erosion in Tibet were confirmed to be consistent with the actual *** brief,this study supplies a new approach for quantitatively evaluating the intensity of freeze-thaw erosion in Tibet.

关键词： freeze-thaw erosion cloud model AHP Tibet

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Costunolide covalently targets NACHT domain of NLRP3 to inhibit inflammasome activation and alleviate NLRP3-driven inflammatory diseases

引用

Acta Pharmaceutica Sinica B 2023年第2期13卷 678-693页

作者： Haowen Xu jiahao chen Pan chen Weifeng Li Jingjing Shao Shanshan Hong Yi Wang Lingfeng chen Wu Luo Guang Liang Chemical Biology Research Center School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhou 325035China School of Pharmaceutical Sciences Hangzhou Medical CollegeHangzhou 311399China Medical Research Center the First Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325000China

The NLRP3 inflammasome’s core and most specific protein,NLRP3,has a variety of functions in inflammation-driven ***(COS)is the major active ingredient of the traditional Chinese medicinal herb Saussurea lappa and has anti-inflammatory activity,but the principal mechanism and molecular target of COS remain ***,we show that COS covalently binds to cysteine 598 in NACHT domain of NLRP3,altering the ATPase activity and assembly of NLRP3 *** declare COS’s great anti-inflammasome efficacy in macrophages and disease models of gouty arthritis and ulcerative colitis via inhibiting NLRP3 inflammasome *** also reveal that theα-methylene-γ-butyrolactone motif in sesquiterpene lactone is the certain active group in inhibiting NLRP3 *** together,NLRP3 is identified as a direct target of COS for its anti-inflammasome ***,especially theα-methylene-γ-butyrolactone motif in COS structure,might be used to design and produce novel NLRP3 inhibitors as a lead compound.

关键词： Costunolide NLRP3 inflammasome Inflammation Molecular target NACHT domain α-Methylene-γ-butyrolactone Gouty arthritis Ulcerative colitis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：