检索结果-南通市图书馆

Science China Chemistry 2024年第4期67卷 1311-1315页

作者： Wu Li Daohong Liao Yougui Li guifu Si Changle Chen School of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009China Key Laboratory of Precision and Intelligent Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

The development of degradable and recyclable polymers is an attractive strategy to tackle the post-consumption pollution issue of commercial ***-acyclic monomers metathesis polymerization(CAMMP)has been recently reported to produce degradable thermoset,thermoplastic and elastomeric polymers,and their degradability is enabled with addition of various *** this contribution,we demonstrate that the utilization of diene comonomers containing photodegradable moiety can give access to thermoset and thermoplastic materials bearing photo-degradation *** copolymerization of a series easily accessible diene comonomers bearing photodegradable ortho-nitrobenzyl moieties with dicyclopentadiene(DCPD)or cyclooctene(COE)leads to the formation of photodegradable p DCPD thermosets and p COE thermoplastic polymers with mechanical properties comparable to their non-degradable *** importantly,their photo-degradation properties can be efficiently tuned with the addition of ultraviolet absorber during in-situ polymerization.

关键词： metathesis polymerization photodegradable polydicyclopentadiene polyethylene-like materials

Highly elastic and degradable vitrimeric elastomers using polycondensation

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第3期35卷 434-438页

作者： Yue Liu Yongshuang Huang Chao Li guifu Si Min Chen Institutes of Physical Science and Information Technology Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationAnhui UniversityHefei 230601China CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Introducing covalently crosslinked network to polymer matrix can merge the advantages in reprocessing and durability of *** this contribution,a series of high-performance vitrimeric elastomers were achieved via *** topological structures of polymers were tuned by varying the feeding ratios of bisacetoacetate,hex–substituted bisacetoacetate,bisamine and tris(2.aminoethyl)*** these structural manipulations,the vitrimeric elastomers presented great elastic recovery properties(strain recovery value up to 80%)benefiting from the introduction of long chain ***,the elastomers exhibited excellent reprocessing property,water vapor/oxygen barrier and adhesive ***,the elastomers could be degraded into monomer under acid conditions which enabled the elastomer synthesis again in closed loop recycling *** ease of the polycondensation in this work to prepare highly elastic and recyclable vitrimeric elastomers demonstrated exciting opportunities for the synthesis of sustainable polymers.

关键词： Polycondensation Vitrimeric elastomers Highly elastic Degradable polymers

Insight into structure evolution of carbon nitrides and its energy conversion as luminescence

在线全文

学校读者我要写书评

暂无评论

Carbon Energy 2024年第2期6卷 37-60页

作者： Hao Zhang Jingwei Zhang Wenjie Chen Minjia Tao Xianguang Meng Yuanjian Zhang guifu Zuo Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials College of Materials Science and EngineeringNorth China University of Science and TechnologyTangshanHebeiChina College of Clinical Medicine North China University of Science and TechnologyTangshanHebeiChina Hebei Iron and Steel Laboratory TangshanHebeiChina Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device Jiangsu Province Hi-Tech Key Laboratory for Bio-Medical ResearchState Key Laboratory of BioelectronicsSchool of Chemistry and Chemical EngineeringMedical SchoolSoutheast UniversityNanjingJiangsuChina

A series of carbon nitride(CN)materials represented by graphitic carbon nitride(g-C_(3)N_(4))have been widely used in bioimaging,biosensing,and other fields in recent years due to their nontoxicity,low cost,and high luminescent quantum *** is more attractive is that the luminescent properties such as wavelength and intensity can be regulated by controlling the structure at the molecular ***,it is time to summarize the related research on CN structural evolution and make a prospect on future *** this review,we first summarize the research history and multiple structural evolution of ***,the progress of improving the luminescence performance of CN through structural evolution was ***,the relationship between CN structure evolution and energy conversion in the forms of photoluminescence,chemiluminescence,and electrochemiluminescence was ***,key challenges and opportunities such as nanoscale dispersion strategy,luminous efficiency improving methods,standardization evaluation,and macroscopic preparation of CN are highlighted.

关键词： carbon nitride chemiluminescence electrochemiluminescence energy conversion photoluminescence structural evolution

A lipid droplets-targetable fluorescent probe for polarity detection in cells of iron death,inflammation and fatty liver tissue

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 2024年第6期35卷 365-369页

作者： Xing Tian Di Wu Wanheng Wei guifu Dai Zhanxian Li Benhua Wang Mingming Yu Green Catalysis Center and College of Chemistry Zhengzhou UniversityZhengzhou 450001China School of Life Sciences Zhengzhou UniversityZhengzhou 450001China Shenzhen Research Institute of Central South University Shenzhen 518057China

Abnormal accumulation and metabolism of lipid droplets can lead to a variety of ***,a key parameter of the microenvironment,is closely associated with many diseases and dysfunctions in the *** is important to elucidate the relationship between the physiological activity of lipid droplets(LDs)and the polarity of the *** this work,based on push-pull mechanism,a fluorescent probe(E)-3-(5-(4-(diphenylamino)phenyl)thiophen-2.yl)-1-(2.hydroxyphenyl)prop-2.en-1-one(PPTH)with aggregation-induced emission(AIE)properties for the detection of polarity changes in cells was *** not only visualize intracellular polarity fluctuation of iron death and inflammation but also distinguish between normal and fatty liver tissue.

关键词： Lipid droplets AIE Polarity Ferroptosis Fatty liver

A review on ultra-small undoped MoS_(2. as advanced catalysts for renewable fuel production

在线全文

学校读者我要写书评

暂无评论

Carbon Energy 2024年第2期6卷 92-112页

作者： Guoping Liu Lingling Ding Yuxuan Meng Ahmad Ali guifu Zuo Xianguang Meng Kun Chang Oi Lun Li Jinhua Ye Hebei Provincial Laboratory of Inorganic Nonmetallic Materials College of Materials Science and EngineeringNorth China University of Science and TechnologyTangshanChina College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjingChina School of Materials Science and Engineering Pusan National UniversityBusanKorea International Center for Materials Nanoarchitectonics(WPIMANA) National Institute for Materials Science(NIMS)1-1 NamikiTsukubaIbarakiJapan

Molybdenum disulfide(MoS_(2.)has garnered significant attention in the field of catalysis due to the high density of active sites in its unique two-dimensional(2.)structure,which could be developed into numerous high-performance *** synthesis of ultra-small MoS2.particles(2. structure and making it probable to regulate the atomic and electronic structure of its intrinsic active sites on a large extent,especially in MoSx *** article summarizes the recent progress of catalysis over ultra-small undoped MoS_(2. particles for renewable fuel *** a systematic review of their synthesis,structural,and spectral characteristics,as well as the relationship between their catalytic performance and inherent defects,we aim to provide insights into catalysis over this matrix that may potentially enable advancement in the development of high-performance MoS_(2.-based catalysts for sustainable energy generation in the future.

关键词： applications catalytic MoS_(2. structure synthesis

Effects of the kinetic pattern of dietary glucose release on nitrogen utilization, the portal amino acid profile, and nutrient transporter expression in intestinal enterocytes in piglets

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 Animal Science and Biotechnology 2024年第5期15卷 2106-2121页

作者： Zexi Li Yunfei Li Yufei Zhao guifu Wang Rujie Liu Yue Li Qamar Aftab Zewei Sun Qingzhen Zhong Jilin Province Key Laboratory of Animal Nutrition and Feed Science College of Animal Science and TechnologyKey Lab of Animal ProductionProduct Quality and SecurityMinistry of EducationJilin Agricultural University2888 Xincheng StreetChangchun CityJilin ProvincePeople’s Republic of China Dongfeng County Sika Deer Industry Development Service Center Dongfeng CountyLiaoyuan CityJilin ProvinceChina

Background Promoting the synchronization of glucose and amino acid release in the digestive tract of pigs could effectively improve dietary nitrogen *** rational allocation of dietary starch sources and the exploration of appropriate dietary glucose release kinetics may promote the dynamic balance of dietary glucose and amino acid ***,research on the effects of diets with different glucose release kinetic profiles on amino acid absorption and portal amino acid appearance in piglets is *** study aimed to investigate the effects of the kinetic pattern of dietary glucose release on nitrogen utilization,the portal amino acid profile,and nutrient transporter expression in intestinal enterocytes in *** Sixty-four barrows(15.00±1.12.kg)were randomly allotted to 4 groups and fed diets formulated with starch from corn,corn/barley,corn/sorghum,or corn/cassava combinations(diets were coded A,B,C,or D respectively).Protein retention,the concentrations of portal amino acid and glucose,and the relative expression of amino acid and glucose transporter m RNAs were *** vitro digestion was used to compare the dietary glucose release *** Four piglet diets with different glucose release kinetics were constructed by adjusting starch *** in vivo appearance dynamics of portal glucose were consistent with those of in vitro dietary glucose release *** nitrogen excretion was reduced in the piglets in group B,while apparent nitrogen digestibility and nitrogen retention increased(P2.h or 4 h after morning feeding),the portal total free amino acids content and contents of some individual amino acids(Thr,Glu,Gly,Ala,and Ile)of the piglets in group B were significantly higher than those in groups A,C,and D(P<0.05).Cluster analysis showed that different glucose release kinetic patterns resulted in different portal amino acid patterns in piglets,which decreased gradually with the

关键词： Glucose release kinetics Nitrogen utilization Nutrient transporter Piglet

Pressure Distinguishes the Dual Emissions in Pseudohalide 2. Ruddlesden-Popper Perovskite Cs_(2.Pb(SCN)_(2.Br_(2.

在线全文

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第7期6卷 1748-1756页

作者： Songhao Guo Yuhong Mao Congcong Chen Yao Zhang Guoxiang Zhao Kejun Bu Qingyang Hu Haiming Zhu guifu Zou Wenge Yang Lingling Mao Xujie Lü Center for High Pressure Science and Technology Advanced Research(HPSTAR) Shanghai Department of Chemistry Southern University of Science and TechnologyShenzhen Department of Chemistry Zhejiang UniversityHangzhou College of Energy Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou

Two-dimensional(2.)Ruddlesden-Popper(RP)halide perovskites with diverse structures and properties have drawn increasing attention due to their promising optoelectronic ***,a new all-inorganic Cs_(2.Pb(SCN)_(2.Br_(2. has been reported that opens up new potential for the development of 2. RP ***,recent reports of unusual dual emissions and two-edge absorption in Cs_(2.Pb(SCN)_(2.Br_(2. have generated intense debate about its origin and remains ***,by combining continuous pressure tuning with in situ diagnostics,we have unambiguously revealed the underlying mechanisms that the 2. Cs_(2.Pb(SCN)_(2.Br_(2. exhibits an intrinsic blue emission at 2.66 eV and an absorption edge close to the emission *** the gradually formed CsPbBr_(3) is responsible for the green emission at 2.33 eV with the absorption shoulder at 2.41 ***,by fitting the temperature-dependent intensity of the intrinsic blue emission,we have determined the corrected value of exciton binding energy for 2. Cs_(2.Pb(SCN)_(2.Br_(2. to be 90 ***,an emission enhancement of 2.5 times is achieved in Cs_(2.Pb(SCN)_(2.Br_(2. under a mild pressure within 0.8 GPa,caused by the pressuresuppressed exciton-phonon *** work not only elucidates the origin of the dual emissions and two-edge absorption in Cs_(2.Pb(SCN)_(2.Br_(2.,but it also provides a potential means to regulate and optimize the optoelectronic properties of 2. perovskites.

关键词： two-dimensional perovskite dual emissions two-edge absorption high pressure in situ characterization enhanced photoluminescence

基于VMD和优化CNN⁃GRU的锂电池剩余使用寿命间接预测

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

现代电子技术 2024年第2期47卷 133-139页

作者：徐达王海瑞朱贵富昆明理工大学信息工程与自动化学院云南昆明650500 昆明理工大学信息化建设管理中心云南昆明650500

准确预测锂电池的剩余使用寿命(RUL)对降低电池使用风险有着至关重要的作用。为了解决电池容量在实际应用中不易获得以及单一门控循环神经网络(GRU)不能有效提取数据间的深层特征等问题,提出一种基于间接健康因子的混合神经网络模型,即... 详细信息

准确预测锂电池的剩余使用寿命(RUL)对降低电池使用风险有着至关重要的作用。为了解决电池容量在实际应用中不易获得以及单一门控循环神经网络(GRU)不能有效提取数据间的深层特征等问题,提出一种基于间接健康因子的混合神经网络模型,即融合变分模态分解(VMD)、一维卷积神经网络(1D‐CNN)和麻雀搜索算法(SSA)优化GRU的组合剩余使用寿命预测模型。采用NASA数据集验证所提模型的有效性,实验结果表明,相比于GRU、VMD‐GRU、VMD‐SSA‐GRU,所提模型具有较高的预测精度与更快的运行速度,可以应用于锂电池RUL预测。

关键词：锂电池剩余使用寿命预测间接健康因子变分模态分解一维卷积神经网络麻雀搜索算法门控循环网络

小波变换和深度残差收缩网络在齿轮箱故障诊断中的应用

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

机械科学与技术 2024年第5期43卷 790-797页

作者：翁敏超王海瑞朱贵富昆明理工大学信息工程与自动化学院昆明650500

齿轮的精确故障诊断是确保旋转机械设备稳定可靠运行的有效手段,针对强噪声环境下齿轮箱中齿轮故障分类问题,提出了一种基于连续小波变换和深度残差收缩网络的故障诊断模型。首先,采用小波变换对一维时间序列的振动数据进行时频分析,将... 详细信息

齿轮的精确故障诊断是确保旋转机械设备稳定可靠运行的有效手段,针对强噪声环境下齿轮箱中齿轮故障分类问题,提出了一种基于连续小波变换和深度残差收缩网络的故障诊断模型。首先,采用小波变换对一维时间序列的振动数据进行时频分析,将其转化为二维时频图作为深度残差收缩网络(DRSN)的输入;其次,在多层卷积神经网络的基础上加入残差结构中的跨层恒等连接解决了梯度消失和爆炸的问题,同时利用自适应阈值子网络实现软阈值化降噪;最后,将故障样本的时频图作为诊断模型的输入进行故障分类。实验结果证明了与其他模型相比,本文采用的故障诊断方法更容易识别故障特征,分类准确率达到了99.15%。

关键词：齿轮箱时频分析深度残差收缩网络(DRSN) 故障诊断

在线全文

学校读者我要写书评

暂无评论

马克思主义与中国文化传统

文化纵横 2024年第4期 147-155页

作者：李铁铮柯贵福东北师范大学马克思主义学部清华大学人文学院

习近平在党的二十大报告中指出:“中国共产党人深刻认识到,只有把马克思主义基本原理同中国具体实际相结合、同中华优秀传统文化相结合,坚持运用辩证唯物主义和历史唯物主义,才能正确回答时代和实践提出的重大问题,才能始终保持马克思... 详细信息

习近平在党的二十大报告中指出:“中国共产党人深刻认识到,只有把马克思主义基本原理同中国具体实际相结合、同中华优秀传统文化相结合,坚持运用辩证唯物主义和历史唯物主义,才能正确回答时代和实践提出的重大问题,才能始终保持马克思主义的蓬勃生机和旺盛活力。”作为阐释并指导中国式现代化的思想资源,,“两个结合”自提出以来就试图回应中国共产党获取执政合法性的动态实践。其中,坚持马克思主义基本原理同中华优秀传统文化相结合是实现马克思主义中国化时代化的根本路径。鉴于当前传统文化的复兴日盛,“第二个结合”的意义重大,需要系统梳理。

关键词：中国式现代化中华优秀传统文化执政合法性根本路径深刻认识马克思主义基本原理马克思主义中国化中国文化传统