检索结果-南通市图书馆

Activation mechanisms on potassium hydroxide enhanced microstructures development of coke powder

Chinese Journal of Chemical Engineering 2020年第1期28卷 299-306页

作者： xiaojing chen Huirong Zhang Yanxia Guo Yan Cao Fangqin cheng State Environmental Protection Key Laboratory on Efficient Resource-utilization Techniques of CoalWaste Institute of Resources and Environmental EngineeringShanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related WastesShanxi UniversityTaiyuan 030006China Institute for Combustion Science and Environmental Technology(ICSET) Western Kentucky University(WKU)Bowling GreenKY 42101United States

Coke powder is expected to be an excellent raw material to produce activated carbon because of its high carbon content. Potassium hydroxide(KOH), as an effective activation agent, was reported to be effective in activating coke powder. However, the microstructures development in the coke powder and its mechanisms when KOH was applied were still unclear. In this study, effects of KOH on the microstructure activation of coke powder were investigated using the surface area and pore structure analyzer, scanning electron microscope(SEM) and thermogravimetry-differential scanning calorimetry-mass spectrometry(TG-DSC-MS), etc. Results revealed that the addition KOH at its lower ratio(mass ratios of KOH and coke powder in a range of 0.5 and 1) decreased the specific surface area and average lateral sizes, but sharply increased of the specific surface area to 132 m^2·g^-1 and 355 m^2·g^-1 and decreased of the space size of aromatic crystallites upon the further increase of the KOH addition amounts(ratios of KOH and coke powder in a range of 3 and 7), generating a number of new micropores and mesopores. The mechanisms study implied surface reactions between KOH and aliphatic hydrocarbon side chain and other carbon functional groups of the coke powder to destruct aromatic crystallites in one dimension and broaden pores at lower KOH addition. In the activation process, KOH was decomposed to be more active components, which can be rapidly destruct the aromatic layers in spatial scope to form developed porous carbon structures within coke powder at higher KOH addition.

关键词： Activated carbon Coke powder Activation Structure Potassium hydroxide

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

基于鲁棒模型预测的无人拖拉机跟踪控制方法分析

引用

农机化研究 2025年第4期47卷 242-246页

作者：侯晓晓涂亚楠陈晓静李怀玉黄河交通学院河南焦作454000

无人驾驶拖拉机是一种利用自动化技术和传感器设备进行自主导航的农业机械设备,可以在无人操作的情况下完成农田的耕作、种植、施肥、除草等作业。无人驾驶拖拉机田间运动控制是拖拉机整机与自动驾驶系统沟通的关键技术。为此,在无人驾... 详细信息

无人驾驶拖拉机是一种利用自动化技术和传感器设备进行自主导航的农业机械设备,可以在无人操作的情况下完成农田的耕作、种植、施肥、除草等作业。无人驾驶拖拉机田间运动控制是拖拉机整机与自动驾驶系统沟通的关键技术。为此,在无人驾驶拖拉机田间运行给定形式路径的基础上,通过构建无人驾驶拖拉机运动模型并进行线性化处理,运用模型预测控制拖拉机田间运行轨迹,以实现对田间无人驾驶拖拉机轨迹跟踪的研究目标。结果表明:基于鲁棒模型预测的拖拉机跟踪控制器能够提高拖拉机田间运行控制精度,拖拉机直线运行控制误差<0.03 m。

关键词：无人拖拉机轨迹跟踪鲁棒模型预测农业机器人

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Gaussian process regression for prediction and confidence analysis of fruit traits by near-infrared spectroscopy

引用

Food Quality and Safety 2023年第1期7卷 132-137页

作者： xiaojing chen Jianxia Xue Xiao chen Xinyu Zhao Shujat Ali Guangzao Huang College of Electrical and Electronic Engineering Wenzhou UniversityWenzhouChina Wenzhou Institute of Industry&Science WenzhouChina

Detection of fruit traits by using near-infrared(NIR)spectroscopy may encounter out-of-distribution samples that exceed the generalization ability of a constructed calibration ***,confidence analysis for a given prediction is required,but this cannot be done using common calibration models of NIR *** address this issue,this paper studied the Gaussian process regression(GPR)for fruit traits detection using NIR *** mean and variance of the GPR were used as the predicted value and confidence,*** show this,a real NIR data set related to dry matter content measurements in mango was *** to partial least squares regression(PLSR),GPR showed approximately 14%lower root mean squared error(RMSE)for the in-distribution test *** with no confidence analysis,using the variance of GPR to remove abnormal samples made GPR and PLSR showed approximately 58%and 10%lower RMSE on the mixed distribution test set,respectively(when the type 1 error rate was set to 0.1).Compared with traditional one-class classification methods,the variance of the GPR can be used to effectively eliminate poorly predicted samples.

关键词： Near-infrared spectroscopy fruit traits calibration model confidence analysis Gaussian process regression

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

Rapid identification of healthy Tegillarca granosa using laser-induced breakdown spectroscopy and fusion model

引用

Food Quality and Safety 2023年第3期7卷 474-482页

作者： xiaojing chen Yanan chen Xi chen Leiming Yuan chengxi Jiang Guangzao Huang Wen Shi College of Electrical and Electronic Engineering Wenzhou UniversityWenzhouChina College of Computer and Artificial Intelligence Wenzhou UniversityWenzhouChina

Objectives:This study presents a method combining a one-class classifier and laser-induced breakdown spectrometry(LIBS)to quickly identify healthy Tegillarca granosa(***).Materials and Methods:The sum of ranking differences(SRD)was used to fuse multiple anomaly detection metrics to build the one-class classifier,which was only trained with healthy *** one-class classifier can identify healthy *** to exclude non-healthy *** proposed method calculated multiple anomaly detection metrics and standardized them to obtain a fusion *** on the fusion matrix,the samples were ranked by SRD and those ranked lowest and below the threshold were considered to be ***:Multiple anomaly detection metrics were fused by the SRD algorithm and tested on each band,and the final fusion model achieved an accuracy rate of 98.46%,a sensitivity of 100%,and a specificity of 80%.The remaining three single classification models obtained the following results:the SVDD model achieved an accuracy rate of 87.69%,a sensitivity of 90%,and a specificity of 60%;the OCSVM model achieved an accuracy rate of 80%,a sensitivity of 76.67%,and a specificity of 60%;and the DD-SIMCA model achieved an accuracy rate of 95.38%,a sensitivity of 98.33%,and a specificity of 60%.Conclusions:The experimental results showed that the proposed method achieved better results than the traditional one-class classification methods with a single ***,the fusion method effectively improves the performance of traditional one-class classifiers when using LIBS to quickly identify healthy substances(healthy ***).

关键词： Laser-induced breakdown spectrum(LIBS) one-class classification(OCC) sum of ranking differences(SRD) fusion model heavy metal

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 targeted nanoplatform co-delivery of pooled siRNA and doxorubicin for reversing of multidrug resistance in breast cancer

引用

Nano Research 2022年第7期15卷 6306-6314页

作者： Hongmei Liu Ding Ma Jinpeng chen Li Ye Yiping Li Yuexia Xie Xue Zhao Hanbing Zou xiaojing chen Jun Pu Peifeng Liu State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer InstituteRenji HospitalShanghai Jiao Tong University School of MedicineShanghai 200032China Central Laboratory Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200127China Department of Biliary-Pancreatic Surgery Shanghai Jiao Tong University School of Medicine Affiliated Renji HospitalShanghai 200127China Thyroid Breast Surgery Nantong First People’s HospitalNantong 226001China Shanghai University of Traditional Chinese Medicine Shanghai 200032China

Multi-drug resistance(MDR)has become the largest obstacle to the success of cancer patients receiving traditional chemotherapeutics or novel targeted ***,we developed a targeted nanoplatform based on biodegradable boronic acid modifiedε-polylysine to co-deliver P-gp siRNA,Bcl-2 siRNA,and doxorubicin for overcoming the *** targeted nanoplatform showed a robust suppressing efficiency for the invasion,proliferation,and colony formation of adriamycin(ADR)resistant breast cancer cell line(MCF-7/ADR)cells in *** ATP responsiveness of the nanoplatform was also proved in the *** the in vivo antitumor experiment,the targeted nanoplatform showed a significant inhibition of tumor growth with good *** goal of this study is to develop a novel and facile strategy to prepare a highly efficient and safe gene and drug delivery system for MDR breast cancer based on biocompatibleε-polylysine polymers.

关键词： multi-drug resistance(MDR) breast cancer adenosine triphosphate(ATP)responsiveness ε-polylysine

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

Effect of Mineral Oil on the Mechanical Properties and Fractographs of Fe_3(Al,Cr,Zr) Intermetallic Alloy

引用

Journal of Materials Science & Technology 1998年第6期14卷 564-566页

作者： Jiansen NI xiaojing WAN Wenjue chen and Song WANG(Institute of Metallurgy and Materials Science, Shanghai University Shanghai 200072) Institute of Metallurgy and Materials Science Shanghai University Shanghai 200072 China

The effect of mineral oil on the mechanical properties and fractographs of Fe3(Al,Cr,Zr) in termetallic alloy has been investigated. The results show that the tensile ductility of the Fe3(Al,Cr,Zr) alloy tested in oil is comparable with the results obtained in oxygen and is in sensitive to strain rate. The fracture mode of the Fe3(Al,Cr,Zr) alloy treated at 700℃/1.5 h and tested in oil, is cleavage and with dimples in some areas.

关键词： Al,Cr,Zr Effect of Mineral Oil on the Mechanical Properties and Fractographs of Fe3 Intermetallic Alloy Zr Fe Cr

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

The Effect of Al and Fe on the Intergranular Embrittlement of Co_3Ti Alloys by Hydrogen Transport from the External Surface

引用

Journal of Materials Science & Technology 2000年第4期16卷 431-434页

作者： Xiaoying chenG, xiaojing WAN, Yexin chen and Meiyi YAO (Institute of Metallurgy and Materials Science, Shanghai University, Shanghai 200072, China) Institute of Metallurgy and Materials Science Shanghai University Shanghai 200072 China

Some observation relating to the solubility, diffusivity and intergranular cracking by hydrogen transport from the external surface in Co_3Ti, Co_3Ti-Al and Co_3Ti-Fe alloys have been carried out. The results show that the addition of alloying elements Al or Fe to Co_3Ti alloy can increase the critical hydrogen concentration for changing from transgranular to brittle intergranular fracture, therefore suppress the moisture induced environmental embrittlement.

关键词： Co Al Ti Fe

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 strategy to significantly improve the classification accuracy of LIBS data:application for the determination of heavy metals in Tegillarca granosa

引用

Plasma Science and Technology 2021年第8期23卷 118-126页

作者： Yangli XU Liuwei MENG xiaojing chen Xi chen Laijin SU Leiming YUAN Wen SHI Guangzao HUANG Wenzhou Vocational College of Science and Technology Wenzhou 325006People's Republic of China College of Electrical and Electronic Engineering Wenzhou UniversityWenzhou 325035People's Republic of China Research and Development Department Hangzhou Goodhere Biotechnology Co.LtdHangzhou 311100People's Republic of China College of Life and Environmental Science Wenzhou UniversityWenzhou 325035People's Republic of China

Tegillarca granosa,as a popular seafood among consumers,is easily susceptible to pollution from heavy ***,it is essential to develop a rapid detection method for Tegillarca *** this issue,five categories of Tegillarca granosa samples consisting of a healthy group;Zn,Pb,and Cd polluted groups;and a mixed pollution group of all three metals were used to detect heavy metal pollution by combining laser-induced breakdown spectrometry(LIBS)and the newly proposed linear regression classification-sum of rank difference(LRC-SRD)*** the comparison models,least regression classification(LRC),support vector machine(SVM),and k-nearest neighbor(KNN)and linear discriminant analysis were also *** accuracy(0.93)was obtained by LRC-SRD model and which performs better than other *** demonstrated that LIBS coupled with LRC-SRD is an efficient framework for Tegillarca granosa heavy metal detection and provides an alternative to replace traditional methods.

关键词： Tegillarca granosa sum of ranking difference heavy metal linear regression classification

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

Development of one-class classification method for identifying healthy *** from those contaminated with uncertain heavy metals by LIBS

引用

International Journal of Agricultural and Biological Engineering 2023年第4期16卷 200-205页

作者： Zhonghao Xie Xi’an Feng Xiao chen Guangzao Huang xiaojing chen Limin Li Wen Shi chengxi Jiang Shuwen Yu School of Marine Science and Technology Northwestern Polytechnical UniversityXi’an 710072China Wenzhou Institute of Industry&Science Wenzhou 325035ZhejiangChina College of Electrical and Electronic Engineering Wenzhou UniversityWenzhou 325035ZhejiangChina Information Technology Center Wenzhou UniversityWenzhou 325035ZhejiangChina

Laser-induced breakdown spectroscopy(LIBS)can be used for the rapid detection of heavy metal contamination of Tegillarca granosa(***),but an appropriate classification model needs to be *** the one-class classification method,only target samples are needed in training process to achieve the recognition of abnormal samples,which is suitable for rapid identification of healthy *** from those contaminated with uncertain heavy *** construction of a one-class classification model for heavy metal detection in *** by LIBS has faced the problem of high-dimension and small *** solve this problem,a novel one-class classification method was proposed in this ***,the principal component scores and the intensity of the residual spectrum were combined as extracted ***,a one-class classifier based on Mahalanobis distance using the extracted features was constructed and its threshold was set by leave-one-out *** sensitivity,specificity and accuracy of the proposed method were reached to 1,0.9333 and 0.9667 respectively,which are superior to the previously reported methods.

关键词： laser-induced breakdown spectroscopy Heavy metal contamination Tegillarca granosa one-class classification

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

China and the EU Stabilize World Order

引用

China Today 2019年第1期68卷 28-31页

作者： chen xiaojing Europe Research Institute of China Institute of International Studies

THE year 2018 marks the 15th anniversary of establishing a comprehensive strategic partnership between China and the European Union(EU).According to the joint statement of the 20th China-EU Summit in Beijing in July 2018,the two sides clearly stated that they are firmly committed to building an open world economy and improving trade and investment liberalization and facilitation,resist protectionism and unilateralism,and promote a more open,balanced,inclusive and shared globalization.

关键词： China-EU Summit shared globalization

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

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：