检索结果-南通市图书馆

Synthesis and Characterization of Storage energy Materials Prepared from Nano-crystalline Cellulose/Polyethylene Glycol

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2006年第8期17卷 1129-1132页

作者： Xiao Ping YUAN en yong ding Key Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of Chemistry Chinese Academy of Science Guangzhou 510650 Graduate School of the Chinese Academy of Science Beijing 100039

This paper gives a brief report of the synthesis of a new kind of solid-solid phase change materials （SSPCMs）, nano-crystalline cellulose/polyethylene glycol （NCC/PEG）. These PCMs have very high ability for energy storage, and their enthalpies reach 103.8 J/g. They are composed of two parts, PEG as functional branches for energy storage, and NCC as skeleton. The flexible polymer PEG was grafted onto the surface of rigid powder of NCC by covalent bonds. The results of DSC, FT-IR were briefly introduced, and some comments were also given.

关键词： Nano-crystalline cellulose (NCC) polyethylene glycol (PEG) phase change materials(PCM) energy storage DSC.

energy Storage Properties of Phase Change Materials Prepared from PEG/CPP

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2005年第10期16卷 1375-1378页

作者： Ya Nan ZANG en yong ding Key Laboratory of Cellulose and Lignocellulosics Chemistry Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou 510650 Graduate School of the Chinese Academy of Sciences Beijing 100039

New kinds of solid-solid phase change materials have been prepared in our laboratory. In these materials, the rigid polymer chlorinated polypropylene is taken as skeletons and the flexible polymer polyethylene glycol 6000 and polyethylene glycol 10000 are taken as functional chains. Results show that chlorinated polypropylene grafted by polyethylene glycol 10000 has greater enthalpy than chlorinated polypropylene grafted by polyethylene glycol 6000.

关键词： Polyethylene glycol chlorinated polypropylene phase change materials.

A METHOD OF PREPARING SPHERICAL NANO-CRYSTAL CELLULOSE WITH MIXED CRYSTALLINE FORMS OF CELLULOSE Ⅰ AND Ⅱ

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2001年第3期19卷 291-296页

作者： Xiao-fang Li en-yong ding Guo-kang Li Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650 China College of Material Science and engineering South China University of Technology, Guangzhou 510641, China 中科院广州化学所广东广州

A new kind of nano-crysta cellulose (NCC) prepared from natural cotton fiber has been obtained by the method ofacid hydrolysis. Compared to most other nanophase materials that derive from inorganic materials, our products are preparedfrom natural cotton fibers. The products are of spherical shape with mixed crystal forms of cellulose I and II. The preparationconditions determine the properties of the products. Prior treatment is a critical procedure. The properties of the products arealso strongly affected by such conditions as the kinds of acids used, the ratio of the acid mixture, the acid concentration, theultrasonic agitation time and hydrolysis temperature. The number average molecular weight of NCC is determined by gelpermeation chromatography (GPC). The particle size and shape were determined by transmission electron microscopy(TEM). X-ray diffraction was used to detect the crystallinity and average crystallite size of the panicle.

关键词： Spherical nano-crystal cellulose Mixed crystal forms of cellulose Ⅰ and Ⅱ, Ultrasonic agitation

Industrial Control Anomaly Detection Based on Distributed Linear Deep Learning

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 1129-1150页

作者： Shijie Tang yong ding Huiyong Wang School of Computer Science and Information Security Guilin University of Electronic TechnologyGuilin541004China School of Electronic engineering and Automation Guilin University of Electronic TechnologyGuilin541004China Guangxi engineering Research Center of Industrial Internet Security and Blockchain Guilin University of Electronic TechnologyGuilin541004China Institute of Cyberspace Technology HKCT Institute for Higher EducationHong Kong999077China School of Mathematics&Computing Science Guilin University of Electronic TechnologyGuilin541004China

As more and more devices in Cyber-Physical Systems(CPS)are connected to the Internet,physical components such as programmable logic controller(PLC),sensors,and actuators are facing greater risks of network attacks,and fast and accurate attack detection techniques are *** key problem in distinguishing between normal and abnormal sequences is to model sequential changes in a large and diverse field of time *** address this issue,we propose an anomaly detection method based on distributed deep *** method uses a bilateral filtering algorithm for sequential sequences to remove noise in the time series,which can maintain the edge of discrete *** use a distributed linear deep learning model to establish a sequential prediction model and adjust the threshold for anomaly detection based on the prediction error of the validation *** method can not only detect abnormal attacks but also locate the sensors that cause *** conducted experiments on the Secure Water Treatment(SWAT)and Water Distribution(WADI)public *** experimental results show that our method is superior to the baseline method in identifying the types of attacks and detecting efficiency.

关键词： Anomaly detection CPS deep learning MLP(multi-layer perceptron)

Interconnections between diabetic corneal neuropathy and diabetic retinopathy:diagnostic and therapeutic implications

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

Neural Regeneration Research 2025年第8期20卷 2169-2180页

作者： Mingyi Yu Faith Teo en Ning Chang Liu Yu-Chi Liu Tissue engineering and Stem Cell Group Singapore Eye Research InstituteSingapore yong Loo Lin School of Medicine National University of SingaporeSingapore Department of Cornea and External Eye Disease Singapore National Eye CenterSingapore Ophthalmology and Visual Sciences Academic Clinical Program Duke-NUS Medical SchoolSingapore

Diabetic corneal neuropathy and diabetic retinopathy are ocular complications occurring in the context of diabetes *** corneal neuropathy refers to the progressive damage of corneal *** retinopathy has traditionally been considered as damage to the retinal ***,growing evidence suggests that diabetic retinopathy is a complex neurovascular disorder resulting from dysfunction of the neurovascular unit,which includes both the retinal vascular structures and neural *** retinopathy is one of the leading causes of blindness and is frequently screened for as part of diabetic ocular ***,diabetic corneal neuropathy is commonly overlooked and underdiagnosed,leading to severe ocular surface *** studies have found that these two conditions tend to occur together,and they share similarities in their pathogenesis pathways,being triggered by a status of chronic *** review aims to discuss the interconnection between diabetic corneal neuropathy and diabetic retinopathy,whether diabetic corneal neuropathy precedes diabetic retinopathy,as well as the relation between the stage of diabetic retinopathy and the severity of corneal *** also endeavor to explore the relevance of a corneal screening in diabetic eyes and the possibility of using corneal nerve measurements to monitor the progression of diabetic retinopathy.

关键词： cornea corneal nerves diabetes diabetic corneal neuropathy diabetic retinopathy retina

Modular assembly of complex C-alkyl glycoside enabled via cooperative NHC and photoredox catalysis

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年

作者： Rui-Qiang Jiao Ming Li Xi Chen Mei-Ze Xu Tian ding Xiao-Ping Gong Zhuo-Mei Li Xue-Yuan Liu yong-Min Liang State Key Laboratory of Applied Organic Chemistry Lanzhou University College of Chemistry and Chemical engineering Northwest Normal University

C-Alkyl glycosides are found in natural products and are indispensable in drug development programs,owing to their diverse range of medicinal ***-component reactions involving glycosyl radical addition are well documented and proved efficient for the C-alkyl glycosides ***,multicomponent reactions for the rapid and controllable construction of structurally diversified C-alkyl glycosides in a single step remains a significant challenge due to the issues associated with balancing reactivity,compatibility,and ***,we report an NHC and photoredox co-catalyzed three-component method to access complex and valuable C-alkyl *** protocol exhibits broad substrate scope and excellent chemoand ***,nine types of sugars are compatible with this *** addition,the generality of this catalytic strategy was further highlighted by the potential for scalable production,the feasibility of further modifications of the products and its successful application in the late-stage functionalization of pharmaceutical skeletons.

关键词：

Experimental Observing Damage Evolution in Cement Pastes Exposed to External Sulfate Attack by in situ X-ray Computed Tomography

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 164-170页

作者： WU Min CAO Kailei XIAO Weirong YU Zetai CAO Jierong ding Qingjun LI Jinhui China Railway Construction Corporation Harbour and Channel engineering Bureau Group Co. LTDZhuhai 519000China Con-struction Headquarters of Zhoushan Liuheng Bridge Phase II Project Zhoushan 316000China China Railway Construction Bridge en-gineering Bureau Group Co. LTDTianjin 300000China State Key Laboratory of Silicate Material for Architecture(Wuhan University of Technology) Wuhan 430070China College of Materials Science and engineering Wuhan Textile UniversityWuhan 430200China

The paper presents experimental investigation results of crack pattern change in cement pastes caused by external sulfate attack(ESA).To visualize the formation and development of cracks in cement pastes under ESA,an X-ray computed tomography(X-ray CT)was used,i e,the tomography system of Zeiss Xradia 510 *** results indicate that X-CT can monitor the development process and distribution characteristics of the internal cracks of cement pastes under ESA with attack *** addition,the C3A content in the cement significantly affects the damage mode of cement paste specimens during sulfate *** damage of ordinary Portland cement(OPC)pastes subjected to sulfate attack with high C3A content are severe,while the damage of sulfate resistant Portland cement(SRPC)pastes is much smaller than that of OPC ***,a quadratic function describes the correlation between the crack volume fraction and development depth for two cement pastes immermed in sulfate solution.

关键词： concrete external sulfate attack damage evolution situ X-ray computed tomography

A new diarylheptanoid from the bark of Myrica rubra

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

Chinese Chemical Letters 2008年第5期19卷 547-549页

作者： ding yong Wang en Gui Liu Yu Jing Feng College of Pharmacy Guangdong Pharmaceutical University Guangzhou Higher Education Mega Center Guangzhou 510006 China

A new diarylheptanoid, 3,5-dimethoxy1-17-hydroxyl-4, 11, 19-triketo-[7,0]meta-cyclophane, named as rubanone 1, was isolated from the bark of Myrica rubra along with four known compounds 2-5. Their structures were eluc... 详细信息

关键词： Myrica rubra Diarylheptanoid Rubanone

Experimental System for Quantum Cryptography Based on Two Nonorthogonal Photon Polarization States

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1998年第4期15卷 238-239页

作者： ZHANG yong DenG Le MAO Min ding Liang-en Laboratory for Quantum Optics National Education CommissionDepartment of PhysicsEast China Normal UniversityShanghai 200062

Quantum cryptography allows the establishing of a highly confidential sequence of random bits between two parties who share no secret information in *** security is guaranteed by the basic laws of quantum mechanics rather than mathematical *** experimental system based on a novel protocol for quantum cryptography using only two nonorthogonal photon polarization states is *** photon sources are two semiconductor laser diodes operated at 680 nm,their light pulses which are heavily attenuated to far below one photon per pulse are employed to encode the *** single photon detection technique is used to minimize the dark count effect of the photon multiplier *** establishing rate of 40 b/s and error rate of 2.1%are *** with other systems,our system has the simplest experimental setup.

关键词： establishing quantum system