检索结果-南通市图书馆

Research on fault diagnosis method of piston rod based on harmonic wavelet and manifold learning

High Technology Letters 2018年第3期24卷 232-240页

作者：江志农 zhu Lina Zhang jinjie Zhou Chao Diagnosis and Self-recovering Engineering Research Center Beijing University of Chemical TechnologyBeijing 1013029P.R.China Compressor Health and Intelligent Monitoring Center of National Key Laboratory of Compressor Technology Beijing University of Chemical TechnologyBeijing 100029P.R.China

As the core part of reciprocating compressor,piston rod is easy to cause a serious accident when abrasion and breakage fault occur to it. Therefore,it is very important to monitor its running state. At present,a small number of reciprocating compressors have been installed on-line monitoring and diagnosis system,most of which can only monitor a single vertical subsidence of piston rod and it can't fully represent the running state of piston rod. Therefore,a method of monitoring the vertical and horizontal displacement of piston rod axis orbit is simultaneously used. In view of the characteristics that the piston rod axis orbit is disordered and difficult to extract features,purification of the axis orbit is carried out based on harmonic wavelet and then features are extracted such as vibration energy,natural frequency and the axis orbit envelope area. After that,a nonlinear local tangent space manifold learning algorithm is used to reduce the dimension of the features and obtain sensitive features. By analyzing the practical cases,the effectiveness of the method for fault monitoring and diagnosis of reciprocating compressor piston rod assembly has been verified. Finally,as BP neural network has the characteristics of solving complex nonlinear problems,the validity of the fault diagnosis method of reciprocating compressor piston rod based on harmonic wavelet and manifold learning is proved by actual case data analysis based on BP neural network.

关键词： piston rod reciprocating compressor axis orbit harmonic wavelet manifold learning

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 morphology of hydroxyapatite nanoparticles regulates clathrinmediated endocytosis in melanoma cells and resultant anti-tumor efficiency

引用

Nano Research 2022年第7期15卷 6256-6265页

作者： Hongfeng Wu Yuchen Hua jinjie Wu Qin Zeng Xiao Yang Xiangdong zhu Xingdong Zhang National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610064China NMPA Key Laboratory for Quality Research and Control of Tissue Regenerative Biomaterials&Institute of Regulatory Science for Medical Devices&NMPA Research Base of Regulatory Science for Medical Devices Sichuan UniversityChengdu 610064China Research Center for Materials Genome Engineering Sichuan UniversityChengdu 610064China

Clathrin-mediated endocytosis plays a critical role for hydroxyapatite nanoparticles(HANPs)to enter tumor cells,induce mitochondrial apoptosis,and inhibit tumor *** study was aimed to investigate how the morphology of HANPs impacts the endocytosis of the particles in melanoma cells,and their anti-tumor effect by using in vitro cell experiments and in vivo tumor animal *** shapes of HANPs,including granular HANPs(G-HANPs),rod-like HANPs(R-HANPs),and needle-like HANPs(N-HANPs),were successfully prepared by wet chemical *** the three HANPs could be internalized into A375 melanoma cells as indicated by cellular transmission electron microscopy *** these HANPs,only G-HANPs induced morphological change of mitochondria and loss of mitochondrial membrane potential(Δψm),and exhibited the greatest intracellular internalization efficiency in the tumor ***,the results of immunofluorescence staining and western blotting indicated that the level of adaptin-2(AP2)protein was up-regulated by all the HANPs,and highest in G-HANPs treated A375 ***,in the tumor-bearing mouse model,we found that tumor growth was delayed by all the three HANPs,of which,G-HANPs delayed tumor growth most efficiently and presented a highest expression level of AP2 protein in tumor ***,this study suggested that the morphology of HANPs regulated their endocytosis efficiency and their effect to inhibit tumor *** work facilitates to direct the rational design of nano-materials for tumor therapy.

关键词： hydroxyapatite nanoparticles adaptin-2 protein morphology endocytosis anti-tumor effect

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

燃煤机组电除尘超低排放改造技术研究

引用

电力与能源 2021年第2期42卷 240-244页

作者：郭海鹰赵金达朱锦杰范妙春杨军浙江菲达环保科技股份有限公司浙江诸暨311800

湖南某电厂300 MW机组电除尘器服役时间较长,电除尘器内部主要部件老化严重,阴阳极振打系统可靠性变差,振打力传递效果变差,极板腐蚀严重,极板、极线积灰严重,加上燃煤变化,电除尘器适应性变差,二次电流较小,出口粉尘排放不能满足要求... 详细信息

湖南某电厂300 MW机组电除尘器服役时间较长,电除尘器内部主要部件老化严重,阴阳极振打系统可靠性变差,振打力传递效果变差,极板腐蚀严重,极板、极线积灰严重,加上燃煤变化,电除尘器适应性变差,二次电流较小,出口粉尘排放不能满足要求。为提高电除尘器性能,进行了电除尘改造和电袋改造两个方案的技术和经济性对比分析,最终选择电除尘改造。电除尘器扩容改造包括:增加收尘面积,降低烟气流速,采用新型高压电控设备等,取得了很好的效果,电除尘器出口排放<40 mg/m^(3),通过后续湿法脱硫、湿式电除尘器协同处理后可满足超低排放的要求。该案例为电除尘器改造积累了经验。

关键词：电除尘超低排放新型电控方案对比

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

Sedimentary and diagenetic facies of tidal flat in epeiric sea and its related descriptive method-a case of Ma51-4 submember in Jingbian gas field of Ordos basin,China

引用

Petroleum 2021年第2期7卷 123-134页

作者： Xi Zhang Haihua zhu Bianjun Lei Jingxuan Zhang Dongxu Wang jinjie Yong School of Geoscience and Technology Southwest Petroleum UniversityChengdu610500China Royal Melbourne Institute of Technology University MelbourneVIC3001Australia PetroChina Changqing Oilfield Company Xi’an710018China

The Ma5_(1-4)submembers of Jingbian gas field in Ordos basin of China belongs to epeiric sea evaporative carbonate tidal flat *** zone of gypsum nodule dolostone and upper part of intertidal zone of gypsum crystal dolostone are most favorable *** carbonate rocks of Ma5_(1-4)had undergone complex ***-poraneous dolomitization and gypsification provided the material foundation of the *** selective dissolution of gypseous dolostone constructs the origin shape of pore *** dissolution and filling of various minerals in the burial period determine whether the early dissolution pores can be preserved,and the final state of the *** dissolution and filling of various minerals determined the preservation of early dissolved pores and the final condition of the *** concept of“minus cement porosity”directly reflects that sedimentary facies have great influence on the growth of reservoir in Ma5_(1-4).Combined with sedimentary microfacies and diagenetic facies,a concise numerical symbol is used to express semiquantitatively sed-imentary microfacies and diagenesis *** descriptive method has great benefit in reservoir evaluation and prediction.

关键词： Ordos Ma51-4 submember Minus cement porosity Sedimentary microfacies Diagenesis

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

Whisker of biphasic calcium phosphate ceramics: Osteoimmunomodulatory behaviors

引用

Nano Research 2022年第10期15卷 9169-9182页

作者： jinjie Wu Cong Feng Menglu Wang Hongfeng Wu Xiangdong zhu Xiangfeng Li Xuening Chen Xingdong Zhang National Engineering Research Center for Biomaterials College of Biomedical EngineeringSichuan UniversityChengdu 610064China

Immune systems play a critical role in the regulation of bone formation and homeostasis,which arouses a growing interest in the development of biomaterials that can modulate both immune response and *** this study,biphasic calcium phosphate(BCP)ceramics were modified with different whiskered surface,and their effects on macrophage polarization and functional status were *** results showed that compared to BCP-W ceramics with long and solid whiskers,BCPHW ceramics with short and hollow whiskers surface were conducive to protein adsorption and macrophage ***,BCP-HW ceramics down-regulated the expression of M1 macrophage markers(Il1β,Tnfα,and iNos),promoted the expression of M2 macrophage markers(Il10 and Arg)and growth factors(Tgfβ1 and Bmp2),which might be attributed to the differential integrin expression regulated by different whisker *** conditioned medium derived from the supernatant of macrophage/whiskered ceramic co-culture was further used to culture MC3T3-E1 pre-osteoblasts to evaluate the effects of whiskered ceramic-mediated macrophage secretion on osteogenesis in *** with BCP-W ones,the secretion pattern induced by BCP-HW ceramics could promote the expression of bone markers in pre-osteoblasts,which might due to the activation of intracellular signaling cascades like BMP/Smad and TGF-β/Smad signaling pathways.A murine intramuscular implantation model suggested that after implantation for 1,2,and 3 weeks,BCP-HW ceramics drove the switch of macrophages to ARG+wound-healing M2 phenotype,while BCP-W ceramics increased the proportion of iNOS+M1 inflammatory *** 2 months,only BCP-HW could induce ectopic bone *** together,these results indicated that BCP ceramics with hollow whiskers were capable of creating a proper inflammatory microenvironment to induce bone *** whiskered BCP ceramics with good osteo-immunomodulatory capacity hold promise in serving as bone gra

关键词： whisker macrophage polariztion osteoinduction biphasic calcium phosphate surface structure

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

Electrochemical converting ethanol to hydrogen and acetic acid for large scale green hydrogen production

引用

Nano Research 2024年第3期17卷 1542-1551页

作者： Yufeng Zhang Wei zhu jinjie Fang Zhiyuan Xu Yanrong Xue Jiajing Pei Rui Sui Xingdong Wang Xuejiang Zhang Zhongbin zhuang State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Laboratory of Advanced Functional Materials of Nanjing Nanjing Xiaozhuang UniversityNanjing 211171China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

Electrochemical coupling hydrogen evolution with biomass reforming reaction(named electrochemical hydrogen and chemical cogeneration(EHCC)),which realizes green hydrogen production and chemical upgrading simultaneously,is a promising method to build a carbon-neutral ***,we analyze the EHCC process by considering the market *** ethanol to acetic acid and hydrogen approach is the most feasible for large-scale hydrogen *** develop AuCu nanocatalysts,which can selectively oxidize ethanol to acetic acid(>97%)with high long-term *** isotopic and in-situ infrared experiments reveal that the promoted water dissociation step by alloying contributes to the enhanced activity of the partial oxidation reaction path.A flow-cell electrolyzer equipped with the AuCu anodic catalyst achieves the steady production of hydrogen and acetic acid simultaneously in both high selectivity(>90%),demonstrating the potential scalable application for green hydrogen production with low energy consumption and high profitability.

关键词： selective ethanol electrooxidation gold alloy catalyst electrochemical-coupled hydrogen production market assessment interfacial water activation

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

Ultrathin NiFeS nanosheets as highly active electrocatalysts for oxygen evolution reaction

引用

Chinese Chemical Letters 2022年第8期33卷 3916-3920页

作者： Yanrong Xue Mengyuan Liu Yangyuanxiang Qin Yufeng Zhang Xuejiang Zhang jinjie Fang Xu Zhang Wei zhu Zhongbin zhuang State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

The development of efficient and cost-effective oxygen evolution reaction(OER)electrocatalysts is crucial for clean energy conversion and storage devices,such as water-splitting,CO_(2) reduction,and metalair ***,we report an efficient 2-dimensional OER catalyst of ultrathin nickel-iron sulfide nanosheets(Ni Fe S-NS).Dodecanethiol is employed in the synthesis,which prohibits the growth along the Z-axis,thus a nanosheet is *** Ni Fe S-NS shows high OER catalytic activity,which only requires a small overpotential of 273 mV to achieve the OER current density of 10 mA/cm^(2) in alkaline electrolyte,and almost no decay after 150 h of chronopotentiometry *** high performance is attributed to the 2-dimensional structure,the synergistic effect from the Ni and Fe components which promotes the formation of the high valence Ni species,and the tuning effect from the in-situ generated sulfate *** work demonstrates the advantages of the 2-dimensional sulfides in electrocatalysis.

关键词： Nanosheets Nickel Iron Sulfides Oxygen evolution

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

Volcanism Pacing Slumping Gravity Flow Deposits during the Late Carboniferous in the Southern Margin of the Junggar Basin,China

引用

Acta Geologica Sinica(English Edition) 2023年第5期97卷 1422-1450页

作者： LI Shixin ZHANG Tingshan ZHANG Xi LIANG Zeliang JI Dongsheng Mihai Emilian POPA YONG jinjie LUO Jinyu ZENG Jianli zhu Haihua School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500China Natural Gas Geology Key Laboratory of Sichuan Province Southwest Petroleum UniversityChengdu 610500China PetroChina Xinjiang Oilfield Company KaramayXinjiang 834000China Faculty of Geology and Geophysics University of BucharestBucharest 010041Romania

Deep-water gravity depositional processes and evolution in arc systems have become topics of intense research focus in recent *** study discusses the co-evolution of volcanism and deep-water gravity flow deposits at the southern margin of the Junggar Basin,based on petrology,geochronology and geochemical *** results show that a massive collapse of unstable sediments from the slope was triggered by volcanism,resulting in the formation of slumping gravity *** occurrence of volcanic beds in the slump deposits confirm that synchronous volcanism likely affected sediment instability,triggering gravity *** Th/Yb,Ta/Yb and Th/Ta elemental ratios,U-Pb ages of detrital zircons and paleocurrent directions indicate that the North Tianshan(NTS)island arc represents the provenance of the Qianxia ***,statistical data on the pyroclastic components in the gravity flow deposits reveal an intensity index of volcanism,indicating that volcanism is strongly related to gravity flow deposits,especially in terms of the type and distribution of the deposits.A model for volcanically-triggered deep-water gravity flow deposits is established,in order to provide a more in-depth understanding of the co-evolution of volcanism and gravity flow deposits within the depositional setting of the late Paleozoic NTS oceanic subduction margin in the Junggar Basin.

关键词： volcanism trigger gravity flow deposits island arc Qianxia Formation Junggar Basin

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

Defective Ni_(3)S_(2)nanowires as highly active electrocatalysts for ethanol oxidative upgrading

引用

Nano Research 2022年第4期15卷 2987-2993页

作者： Yufeng Zhang Wei zhu jinjie Fang Zhiyuan Xu Yanrong Xue Di Liu Rui Sui Qingqing Lv Xuerui Liu Yongsheng Wang Wei Chen Zhongbin zhuang State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

Electrochemical upgrading of biomass ethanol to value-added chemicals is promising for sustainable ***,we synthesize defective Ni_(3)S_(2) nanowires(NWs),which show high activity towards electrochemical oxidation of ethanol to *** Ni_(3)S_(2) NWs are formed by the oriented attachment mechanism,and rich defects are introduced during the growth.A low onset potential of 1.31 V and high mass activity of 8,716 mA·mgNi^(-1) at 1.5 V are achieved using the synthesized Ni_(3)S_(2) NWs toward the ethanol electro-oxidation,which are better than the Ni(OH)2 NWs and the Ni_(3)S_(2) nanoparticles(NPs).And the selectivity for the acetate generation is ca.99%.The high activity of Ni_(3)S_(2) NWs is attributed to the easier oxidation of Ni(II)to the catalytically active Ni(III)species with the promotion from S component and rich *** results demonstrate that the defective NWs can be synthesized by the oriented attachment method and the defective Ni_(3)S_(2) NWs structure as the efficient nonnoble metal electrocatalysts for oxidative upgrading of ethanol.

关键词： nickel sulfide electrocatalyst ethanol oxidation defects oriented attachment

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

Cold-induced Yes-associated-protein expression through miR-429 mediates the browning of white adipose tissue

引用

Science China(Life Sciences) 2021年第3期64卷 404-418页

作者： Chenji Ye jinjie Duan Xuejiao Zhang Liu Yao Yayue Song Guangyan Wang Qi Li Biqing Wang Ding Ai Chunjiong Wang Yi zhu Tianjin Key Laboratory of Metabolic Diseases Department of Physiology and PathophysiologyCollaborative Innovation Center of Tianjin for Medical EpigeneticsTianjin Medical UniversityTianjin 300070China Tianjin Key Laboratory of Medical Epigenetics Tianjin Medical UniversityTianjin 300070China

Targeting the white-to-brown fat conversion is important for developing potential strategies to counteract metabolic diseases;yet the mechanisms are not fully ***-associated-protein(YAP),a transcription co-activator,was demonstrated to regulate adipose tissue functions;however,its effects on browning of subcutaneous white adipose tissue(sWAT)are *** demonstrated that YAP was highly expressed in cold-induced beige ***,YAP was found as a target gene of miR-429,which downregulated YAP expression in vivo and in *** addition,miR-429 level was decreased in cold-induced beige ***,pharmacological inhibition of the interaction between YAP and transcriptional enhanced associate domains by verteporfin dampened the browning of *** adipose tissue-specific YAP overexpression increased energy expenditure with increased basal uncoupling protein 1 expression,it had no additional effects on the browning of sWAT in young ***,we found age-related impairment of sWAT browning along with decreased YAP *** these circumstances,YAP overexpression significantly improved the impaired WAT browning in middle-aged *** conclusion,YAP as a regulator of sWAT browning,was upregulated by lowering miR-429 level in cold-induced beige *** the miR-429-YAP pathway could be exploited for therapeutic strategies for age-related impairment of sWAT browning.

关键词： aging browning miR-429 UCP1 YAP

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：