检索结果-南通市图书馆

Object Grasping Detection Based on Residual Convolutional Neural Network

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

Journal of donghua university(English Edition) 2022年第4期39卷 345-352页

作者：吴迪吴乃龙石红瑞 College of Information Science and Technology Donghua UniversityShanghai 201620China

Robotic grasps play an important role in the service and industrial fields,and the robotic arm can grasp the object properly depends on the accuracy of the grasping detection *** order to predict grasping detection positions for known or unknown objects by a modular robotic system,a convolutional neural network(CNN)with the residual block is proposed,which can be used to generate accurate grasping detection for input images of the *** proposed model architecture was trained on the standard Cornell grasp dataset and evaluated on the test ***,it was evaluated on different types of household objects and cluttered *** the Cornell grasp dataset,the accuracy of the model on image-wise splitting detection and object-wise splitting detection achieved 95.5%and 93.6%,***,the real detection time per image was 109 *** experimental results show that the model can quickly detect the grasping positions of a single object or multiple objects in image pixels in real time,and it keeps good stability and robustness.

关键词： grasping detection residual convolutional neural network(Res-CNN) Cornell grasp dataset household objects cluttered multi-objects

A fluorescent probe operating under weak acidic conditions for the visualization of HOCl in solid tumors in vivo

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2020年第8期63卷 1153-1158页

作者： Peng Wei Lingyan Liu Wei Yuan Jiajia Yang Ruohan Li Tao Yi State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 201620China College of Chemistry Chemical Engineering and BiotechnologyDonghua UniversityShanghai 201620China Department of Chemistry Fudan UniversityShanghai 200438China

Levels of reactive oxygen species(ROS)in cancer cells or in the tumor microenvironment differ noticeably from those in normal cells and cellular microenvironments because ROS play important roles in all aspects of tumor ***,due to the lack of adequate tools,it is difficult to study the relationship between ROS,especially certain types of ROS(e.g.,HOCl),and *** report herein an HOCl-specific fluorescent probe,FDOCl-20,containing a thiocarbamide group as a receptor,for the visualization of HOCl in solid tumors in *** probe displays high selectivity and sensitivity to HOCl,and is appropriate for use in acidic conditions,including the tumor *** FDOCl-20 as a tool,we can visualize HOCl in solid tumors in ***,the fluorescent intensity of FDOCl-20 is proportional to tumor ***,FDOCl-20 is a useful tool to investigate the relationship between HOCl and the physiological processes of tumors.

关键词： fluorescent probe hypochlorous acid imaging solid tumor

Fabrication and Characterization of Yarn-Based Temperature Sensor for Respiratory Monitoring

在线全文

学校读者我要写书评

暂无评论

Journal of donghua university(English Edition) 2022年第6期39卷 527-532页

作者：白云峰谢二想李乔王玺丁浩朱世根 College of Mechanical Engineering Donghua UniversityShanghai 201620China Engineering research Center of Advanced Textile Machinery Ministry of EducationDonghua UniversityShanghai 201620China College of Textiles Donghua UniversityShanghai 201620China College of Information Science and Technology Donghua UniversityShanghai 201620China

The development of wearable technologies promotes the research of flexible *** is hoped that a flexible sensor can collect different physiological data,such as temperature and respiratory rate(RR).The temperature of the exhaled gas is generally higher than that in the air,and the periodic change of temperature is related to the respiratory *** this work,we use platinum fiber and spandex fiber to prepare yarn-based temperature sensor with high tensile performance through hollow spindle wrapping spinning *** the measurement,the sensitivity of the sensor can reach at least 3.18×10^(-3)℃^(-1).We use the sensor and ordinary fabric mask to prepare a sensor mask that can monitor human respiratory signals to explore the performance of the sensor in RR *** experimental results show that when measuring human RR,the yarn-based temperature sensor can accurately distinguish different respiratory states such as normal breathing,deep breathing,and rapid breathing while *** is suggested that yarn-based temperature sensors can be used in medical fields such as real-time respiratory detection and temperature measurement.

关键词： flexible sensor yarn-based temperature sensor sensing mask respiratory measurement

Extraction of Feature Points for Non-Uniform Rational B-Splines(NURBS)-Based Modeling of Human Legs

在线全文

学校读者我要写书评

暂无评论

Journal of donghua university(English Edition) 2022年第4期39卷 299-303页

作者：王玺吴宗谦李乔 College of Information Science and Technology Donghua UniversityShanghai 201620China Engineering research Center of Digitized Textile&Fashion Technology Ministry of EducationShanghai 201620China College of Textiles Donghua UniversityShanghai 201620China

Methods of digital human modeling have been developed and utilized to reflect human shape ***,most of published works focused on dynamic visualization or fashion design,instead of high-accuracy modeling,which was strongly demanded by medical or rehabilitation *** to a high-accuracy modeling of human legs based on non-uniform rational B-splines(NURBS),the method of extracting the required quasi-grid network of feature points for human legs is presented in this *** the 3 D scanned human body,the leg is firstly segmented and put in standardized *** re-sampling of the leg is conducted via a set of equidistant cross *** analysis of leg circumferences and circumferential curvature,the characteristic sections of the leg as well as the characteristic points on the sections are then identified according to the human anatomy and shape *** obtained collection can be arranged to form a grid of data points for knots calculation and high-accuracy shape reconstruction in future work.

关键词： 3D scan digital human modeling non-uniform rational B-splines(NURBS) feature extraction

Study on the influence of standoff distance on substrate damage under an abrasive water jet process by molecular dynamics simulation

在线全文

学校读者我要写书评

暂无评论

Friction 2018年第2期6卷 195-207页

作者： Ruling CHEN Di ZHANG Yihua WU College of Mechanical Engineering Donghua University Nano-Science and Technology research Center Shanghai University

The process of a cluster-containing water jet impinging on a monocrystalline silicon substrate was studied by molecular dynamics simulation. The results show that as the standoff distance increases, the jet will gradually diverge. As a result, the solidified water film between the cluster and the substrate becomes "thicker" and "looser". The "thicker" and "looser" water film will then consume more input energy to achieve complete solidification, resulting in the stress region and the high-pressure region of the silicon substrate under small standoff distances to be significantly larger than those under large standoff distances. Therefore, the degree of damage sustained by the substrate will first experience a small change and then decrease quickly as the standoff distance increases. In summary, the occurrence and maintenance of complete solidification of the confined water film between the cluster and the substrate plays a decisive role in the level of damage formation on the silicon substrate. These findings are helpful for exploring the mechanism of an abrasive water jet.

关键词： standoff distance crystalline silicon substrate abrasive water jet molecular dynamics simulation

Preparation of Polyaniline/Cellulose Nanofiber Aerogel for Efficient Removal of Cr(Ⅵ) from Aqueous Solution

在线全文

学校读者我要写书评

暂无评论

Journal of donghua university(English Edition) 2022年第1期39卷 7-14页

作者：李加强廖耀祖吕伟于俊荣 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 201620China College of Materials Science and Engineering Donghua UniversityShanghai 201620China

Aerogel composed of polyaniline/cellulose nanofiber(PANI/CNF)was synthesized by a two-step method and used as an adsorbent to remove Cr(Ⅵ)from wastewater in this *** results showed that PANI/CNF aerogel adsorbent exhibited a high adsorption capacity of 298.5 mg·g-1 for Cr(Ⅵ)(318 K,pH=2.0).Meanwhile,the adsorption process can be fitted well with the pseudo-second-order model and the Freundlich ***,the Cr(Ⅵ)removal efficiency of the adsorbent remained above 85%after ten recycling experiments,indicating that PANI/CNF aerogel had excellent stability and ***,PANI/CNF aerogel showed a potential application in the treatment of chromium-containing wastewater.

关键词： polyaniline(PANI) cellulose nanofiber aerogel Cr(Ⅵ) adsorption

Improved Fibroblast Adhesion and Proliferation by Controlling Multi-level Structure of Polycaprolactone Microfiber

在线全文

学校读者我要写书评

暂无评论

东华大学学报（英文版） 2020年第4期37卷 280-285页

作者：焦勇杰李超婧李奇薇刘来俊王富军王璐 Key Laboratory of Textile Science and Technology Ministry of EducationDonghua UniversityShanghai 201620China College of Textiles Donghua UniversityShanghai 201620China

Improving wound healing efficiency is a key issue for high performance *** surface topology of fibers in wound dressings plays an important role in regulating cell behaviors during the ***,a polycaprolactone(PCL)scaffold with a shish-kebab structure was prepared by electrospinning and solution-induced crystallization.L929 cells were used to investigate the behavior of fibroblasts on the multi-level *** results showed that the shish-kebab fiber-based scaffold enhanced the cell proliferation when compared with the normal fiber and the fiber with a porous *** absorption,cell adhesive force,and cell modulus also increased by the shish-kebab *** shish-kebab fiber-based scaffold with improved fibroblast-regulation ability can be applied in rapid wound healing.

关键词： cell-regulation multi-level microfiber shish-kebab structure electrospinning surface

Zero-Sequence Current Suppression Strategy for Open-End Winding Permanent Magnet Synchronous Motor Based on Model Predictive Control

在线全文

学校读者我要写书评

暂无评论

Journal of donghua university(English Edition) 2020年第4期37卷 286-292页

作者：刘华山李杰姚飞 College of Information Science and Technology Donghua UniversityShanghai 201620China Engineering research Center of Digitized Textile&Apparel Technology Ministry of EducationShanghai 201620China

Compared with the traditional three-phase star connection winding,the open-end winding permanent magnet synchronous motor(OW-PMSM)system with a common direct current(DC)bus has a zero-sequence circuit,which makes the common-mode voltage and the back electromotive force(EMF)harmonic generated by the inverters produce the zero-sequence current in the zero-sequence circuit,and the zero-sequence current has great influence on the operation efficiency and stability of the motor control system.A zero-sequence current suppression strategy is presented based on model predictive current control for *** the mathematical model of OW-PMSM to establish the predictive model and the zero-sequence circuit model,the common-mode voltage under different voltage vector combinations is fully considered during vector selection and action time *** zero-sequence loop constraints are established,so as to suppress the zero-sequence *** the end,the control strategy proposed in this paper is verified by simulation experiments.

关键词： open-end winding permanent magnet synchronous motor(OW-PMSM) zero-sequence current harmonic model predictive current control common-mode voltage

CN-DBpedia2: An Extraction and Verification Framework for Enriching Chinese Encyclopedia Knowledge Base

在线全文

学校读者我要写书评

暂无评论

Data Intelligence 2019年第3期1卷 271-288页

作者： Bo Xu Jiaqing Liang Chenhao Xie Bin Liang Lihan Chen Yanghua Xiao School of Computer Science and Technology Donghua UniversityShanghai 200051China Shanghai Key Laboratory of Data Science School of Computer ScienceFudan UniversityShanghai 200433China

Knowledge base plays an important role in machine understanding and has been widely used in various applications, such as search engine, recommendation system and question answering. However, most knowledge bases are incomplete, which can cause many downstream applications to perform poorly because they cannot find the corresponding facts in the knowledge bases. In this paper, we propose an extraction and verification framework to enrich the knowledge bases. Specifically, based on the existing knowledge base, we first extract new facts from the description texts of entities. But not all newly-formed facts can be added directly to the knowledge base because the errors might be involved by the extraction. Then we propose a novel crowd-sourcing based verification step to verify the candidate facts. Finally, we apply this framework to the existing knowledge base CN-DBpedia and construct a new version of knowledge base CN-DBpedia2, which additionally contains the high confidence facts extracted from the description texts of entities.

关键词： Knowledge graph Entity typing Slot filling Information extraction Crowdsourcing