检索结果-南通市图书馆

Modeling robotic operations controlled by natural language

Control Theory and Technology 2017年第4期15卷 258-266页

作者： Yu Cheng Jiatong Bao Yunyi Jia zhuhui deng Zhiyong Sun Sheng Bi Congjian Li Ning Xi 1. Department of Electrical and Computer Engineering Michigan State University East Lansing MI 48823 U.S.A. 2. Department of Industrial and Manufacturing Systems Engineering The University of Hong Kong Hong Kong Hong Kong 3. Department of Automotive Engineering Clemson University Greenville South Carolina 29607 U.S.A.

There are multiple ways to control a robotic system. Most of them require the users to have prior knowledge about robots or get trained before using them. Natural language based control attracts increasing attention due to its versatility and less requirements for users. Since natural language instructions from users cannot be understood by the robots directly, the linguistic input has to be processed into a formal representation which captures the task specification and removes the ambiguity inherent in natural language. For most of existing natural language controlled robotic system, they assume the given language instructions are already in correct orders. However, it is very likely for untrained users to give commands in a mixed order based on their direct observation and intuitive thinking. Simply following the order of the commands can lead to failures of tasks. To provide a remedy for the problem, we propose a novel framework named dependency relation matrix （DRM） to model and organize the semantic information extracted from language input, in order to figure out an executable sequence of subtasks for later execution. In addition, the proposed approach projects abstract language input and detailed sensory information into the same space, and uses the difference between the goal specification and temporal status of the task under implementation to monitor the progress of task execution. In this paper, we describe the DRM framework in detail, and illustrate the utility of this approach with experiment results.

关键词： Natural language control task planning human-machine interaction

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

In vitro Genotoxic Activity of River Water Before and After Chlorination

引用

Biomedical and Environmental Sciences 1998年第2期11卷 165-170页

作者： ZHANGJUN－RAN zhuhui－GANG DepartmentofEnvironmentHealth ShanghaiMedicalUniversityShanghai200032 DepartmentofEnvironmentHealth

The production of chlorinated by-products through chlorine disinfection of drinking water has been well documented. Natural organic precursors including fulvic and humic acids may produce new mutagenic compounds in their chlorination process. Comparisons of river water and drinking water extracts have confirmed that chlorination during water treatment produces mutagenic activity in the salmonella (Ames) test. The present work concerning XAD-2 and 402 resin extracts of river water from four locations in the Z river and the corresponding chlorinated water from four waterworks has involved two mutagenicity assays for genetic damage:Salmonella test and Syrian hamsters embryo (SHE) cell transformation test. Both river and drinking (chlorinated) water extracts were mutagenic in the Salmonella test and potentially carcinogenic in SHE cell transformation assay. A definite dose response relationship was observed. Compared to the river water samples, the response intensity was higher in the chlorinated samples, The results show that chlorination could increase the genotoxic intensity of drinking water extracts. The results obtained from bacterial mutagenic assay tend to be consistent with those results of SHE cell transformation assay.

关键词：氯化处理河水体外基因毒性激活作用

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

In-Situ Growing of Branched CNFs on Reusable RCFs to Construct Hierarchical Cross-Linked Composite for Enhanced Microwave Absorption

引用

Journal of Renewable Materials 2023年第11期11卷 3891-3906页

作者： Lei Liu Shenao Pang zhuhui Luo College of Mechanical Engineering Hunan University of TechnologyZhuzhou412008China

The recycling of carbon fibers and protection from unwanted microwave radiation are two important environmental issues that need to be addressed in modern ***,branched carbon nanofibers(CNFs)were grown in-situ on recycled carbon fibers(RCFs)through the chemical vapor deposition method using nickel as catalysts and thiophene as *** effect of thiophene on the growth morphology of CNFs was ***,branched CNFs-RCFs and straight CNFs-RCFs were respectively obtained in the presence and absence of *** microstructure and electromagnetic behaviour investigations have shown that the branched CNFs possess a typical multi-branched structure,with more defects,pores and a larger specific surface area than the straight CNFs,which lead to better impedance matching and adequate dielectric loss ability for the branched *** reflection loss(RL)results show that the branched CNFs-RCFs exhibit an optimum RL of -23.6 dB at 1.5 mm and a best effective absorption bandwidth(EAB)of 7.5 GHz at 2.0 *** research provides an innovative microwave absorbing material with adequate absorbing strength and outstanding EAB,while also promoting the sustainable reuse of the RCFs resources.

关键词： Branched carbon nanofibers recycled carbon fibers in-situ growing microwave absorption

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

Enhanced biohydrogen generation from organic wastewater containing NH^(+)_(4)by phototrophic bacteria Rhodobacter sphaeroides AR-3

引用

Frontiers of Environmental Science & Engineering 2009年第4期3卷 387-392页

作者： Guanghong ZHENG zhuhui KANG Yifan QIAN Lei WANG State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China

NH^(+)_(4)is typically an inhibitor to hydrogen production from organic wastewater by *** this experiment,biohydrogen generation with wild-type anoxygenic phototrophic bacterium Rhodobacter sphaeroideswas found to be sensitive to NH^(+)_(4)due to the significant inhibition of NH^(+)_(4)to its *** order to avoid the inhibition of NH^(+)_(4)to biohydrogen generation by ***,a glutamine auxotrophic mutant *** AR-3 was obtained by mutagenizing with ethyl methane *** AR-3 mutant could generate biohydrogen efficiently in the hydrogen production medium with a higher NH^(+)_(4)concentration,because the inhibition of NH^(+)_(4)to nitrogenase of AR-3 was *** suitable conditions,AR-3 effectively produced biohydrogen from tofu wastewater,which normally contains 50–60 mg/L NH^(+)_(4),with an average generation rate of 14.2 mL/L$*** generation rate was increased by more than 100%compared with that from wild-type ***.

关键词： ammonium anoxygenic phototrophic bacterium biohydrogen glutamine auxotrophic tofu wastewater

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

Promoting Activity of Microcystins Extracted From Waterblooms in SHE Cell Transformation Assay

引用

Biomedical and Environmental Sciences 1996年第1期9卷 46-51页

作者： WANGHONG－BING zhuhui－GANG DepartmentofEnvironmentalHealth ShanghaiMedicalUniversityShanghai200032China DepartmentofEnvironmen

Microcystis aeruginosa is the dominant algae in most of the eutrophicated lakes in China. It can produce cyclic heptapeptides, known as microcystins, which can cause liver damage in wild and domestic animals. In this paper, a two-stage transformation assay for demonstrating the carcinogenic effects of the algal toxins is reported. The cell strain used in this assay was derived from embryos of Syrian golden hamster and the algal toxins were extracted from Microcystis aeruginosa, termed microcystis raw toxin (MRT). To elucidate its promoting activity, the target cells were first exposed to a low dosage of 3-mcthylcholanthrene (MCA) and then to MRT. The results showed that MRT significantly enhanced the MCA-initiated cell transformation, and a dose-response relatinnship was observed, but it failed to induce transformation of SHE cells not pretreated by MCA. These results suggest that the MRT play an important role in the malignant transformation of SHE cells. MRT may thus be a tumor promoter, and this transformation assay with SHE cells may be used to predict tumor prompting activity of environmental chemicals, before long-term in vivo two-stage carcinogenesis experiments are carried out.

关键词： Activity Cell SHE

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

Novel hard materials with controlled (W_(0.5)Al_(0.5))C grain shapes: in-situ high pressure preparation and mechanical properties

引用

Acta Metallurgica Sinica(English Letters) 2012年第1期25卷 40-46页

作者： zhuhui QIA Xianfeng MA Huaguo TANG Wei ZHAO State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academyof Sciences Lanzhou 730000 China CAS Key Laboratory of Rare Earth on Advanced Materials and Valuable Utilization of Resources Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

A novel hard material with various （W0.5Al0.5）C grain shapes was successfully prepared through mechanical alloying and in-situ high-pressure sintering process. X-ray diffraction apparatus and scanning electron microscopy were used to characterize the phase and the microstructures of the samples. The novel hard materials with ＂fibrous＂, ＂rounded＂ and ＂plate-like＂ grains, which do not contain sharp edges, have the improved mechanical properties. The bulk boundless （W0.5Al0.5）C hard material with various （W0.5Al0.5）C grain shapes possesses good mechanical properties and light weight. The formation mechanism for the non-equilibrium （W0.5Al0.5）C grains during in-situ high-pressure sintering is also discussed.

关键词： Novel hard material Controlled (W0.5Al0.5)C grain In-situhigh-pressure sintering Grain growth mechanism

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 novel Cu-doped high entropy alloy with excellent comprehensive performances for marine application

引用

Journal of Materials Science & Technology 2021年第10期69卷 48-59页

作者： Yuan Yu Nannan Xu Shengyu Zhu zhuhui Qjao Jianbin Zhang Jun Yang Weimin Liu State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Qingdao Center of Resource Chemistry and New Materials Qingdao 266000China School of Public Health Qingdao UniversityQingdao266000China

High entropy alloy(HEA)has attracted great interests as one of the promising multifunctional materials in marine ***,Cu as an effective biocide tends to form segregation in HEA,which could deteriorate corrosion and induce brittle ***,we report a strategy to tailor the existing form of Cu in HEA from undesired large-scale segregation to uniform distribution with dispersed nanoscale precipitation,while retaining the unique structure characteristics of *** Cu segregation improves toughness and avoids serious corrosion in the grain *** distribution with dispersed nanoscale precipitation of Cu further enhances the antifouling and lubricating abilities of Cu-doped *** AlCoCrFeNiCu_(0.5)HEA in this work has excellent comprehensive properties combining good mechanical properties,outstanding antifouling abilities,superior resistance to corrosion and ***,the corresponded mechanisms are discussed in terms of Cu-segregation-eliminated,nanoscale-Cu-precipitate-forming and comprehensive properties.

关键词： High entropy alloys Copper Nanoscale precipitate Comprehensive properties Ocean

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

High-throughput sequencing identifies salivary microbiota in Chinese caries-free preschool children with primary dentition

引用

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2021年第4期22卷 285-294页

作者： Lei XU Zhifang WU Yuan WANG Sa WANG Chang SHU zhuhui DUAN Shuli deng The Affiliated Hospital of Stomatology School of StomatologyZhejiang University School of Medicineand Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceHangzhou 310006China Department of Stomatology Luoyang Central Hospital Affiliated to Zhengzhou UniversityLuoyang 471009China

Objectives:The study aimed at identifying salivary microbiota in caries-free Chinese preschool children using highthroughput ***:Saliva samples were obtained from 35 caries-free preschool children(18 boys and 17 girls)with primary dentition,and 16 S ribosomal DNA(r DNA)V3–V4 hypervariable regions of the microorganisms were analyzed using Illumina ***:At 97%similarity level,all of these reads were clustered into 334 operational taxonomic units(OTUs).Among these,five phyla(Firmicutes,Proteobacteria,Actinobacteria,Bacteroidetes,and Candidate division TM7)and13 genera(Streptococcus,Rothia,Granulicatella,Prevotella,Enterobacter,Veillonella,Neisseria,Staphylococcus,Janthinobacterium,Pseudomonas,Brevundimonas,Devosia,and Gemella)were the most dominant,constituting 99.4%and 89.9%of the salivary microbiota,*** core salivary microbiome comprised nine genera(Actinomyces,Capnocytophaga,Gemella,Granulicatella,Lachnoanaerobaculum,Neisseria,Porphyromonas,Rothia,and Streptococcus).Analysis of microbial diversity and community structure revealed a similar pattern between male and female *** difference in microbial community composition between them was mainly attributed to Neisseria(P=0.023).Furthermore,functional prediction revealed that the most abundant genes were related to amino acid transport and ***:Our results revealed the diversity and composition of salivary microbiota in caries-free preschool children,with little difference between male and female *** of the core microbiome,coupled with prediction of gene function,deepens our understanding of oral microbiota in cariesfree populations and provides basic information for associating salivary microecology and oral health.

关键词： Salivary microbiota Caries-free Preschool children Primary dentition Illumina MiSeq 16S rDNA V3-V4 hypervariable regions

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

Single-atom Ni-N_(4) for enhanced electrochemical sensing

引用

Nano Research 2024年第8期17卷 7658-7664页

作者： zhuhui Qin Bo Tang Guiru Zhang Chongqing Zhu Kun Jiang Bowei Zhang Fu-Zhen Xuan Shanghai Key Laboratory of Intelligent Sensing and Detection Technology East China University of Science and TechnologyShanghai 200237China Key Laboratory of Pressure Systems and Safety of Ministry of Education East China University of Science and TechnologyShanghai 200237China School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China Key Laboratory of Theoretical and Computational Photochemistry Ministry of EducationCollege of ChemistryBeijing Normal UniversityBeijing 100875China Interdisciplinary Research Center School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Single-atom catalysts(SACs)attract widespread attention in heterogeneous catalysis due to their maximum atomic utilization efficiency and unique physical and chemical ***,their applications in chemical sensing keep huge potential but remain ***,a Ni-N_(4)-C SAC was synthesized for the trace detection of dopamine(DA)and uric acid(UA).The Ni-N_(4)-C SAC exhibited superior sensing performance compared to the Ni *** detection range for DA and UA were 0.05–75μM and 5–90μM with detection limits of 0.027 and 0.82μM,*** functional theory(DFT)computations indicate that Ni-N_(4)-C has a lower reaction barrier during electrochemical process,indicating that the atomic Ni sites possess higher intrinsic activity than Ni ***,DA and UA show strong potential dependency on the Ni-N_(4)-C catalyst,indicating its applicability for their concurrent *** work extends the application of SACs in chemical sensing.

关键词： single-atom catalysts chemical sensing dopamine uric acid

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

Effects of Ti and Cu on the Microstructure Evolution of AlCoCrFeNi High-Entropy Alloy During Heat Treatment

引用

Acta Metallurgica Sinica(English Letters) 2020年第8期33卷 1077-1090页

作者： Yuan Yu Peiying Shi Kai Feng Jiongjie Liu Jun Cheng zhuhui Qiao Jun Yang Jinshan Li Weimin Liu State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Qingdao Center of Resource Chemistry and New Materials Qingdao 266000China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan UniversityChangsha 410082China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China

The microstructure evolution of AlCoCrFeNiTi0.5 alloy and AlCoCrFeNiCu alloy during heat treatment was systematically studied,to reveal the influence rules of chemical activity of adding element on the microstructure evolution of AlCoCrFeNi *** to the negative mixing enthalpy with the constituent elements,Ti element was mainly dissolved in the Al-Nirich phases,and aggravated the lattice distortion of B2 *** structure variation of BCC phase by adding Ti inhibited the formation of FCC phase and enhanced the precipitation ofσphase during heat *** to the positive mixing enthalpy with constituent elements,Cu element tended to be repelled to the ID region and formed metastable Cu-rich FCC1 phase which would transform into Cu-Al-Ni-rich FCC2 phase with increasing *** addition of Cu inhibited the precipitation ofσphase during heat *** Ti maintained the stable dendritic morphology,while adding Cu reduced the thermal stability of *** dramatic morphology changes occurred at 1000℃and 1100℃in the AlCoCrFeNiCu *** lattice distortion of phase in AlCoCrFeNiTi0.5 alloy was aggravated with increasing temperature up to 800℃,then relaxed together with the dissolution ofσphase when temperature was above 900℃.The variation in lattice distortion dominated the hardness of AlCoCrFeNiTi0.5 *** increasing heating temperature,the increasing volume fraction of region with FCC structure due to the transformation between FCC phases,and the pronounced coarsening in microstructure due to the reduced thermal stability,resulted in the mainly decreasing trend in the hardness of AlCoCrFeNiCu alloy.

关键词： High-entropy alloy Heat treatment Microstructure evolution Enthalpy Hardness

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：