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Application of a Novel Method for Machine Performance Degradation Assessment Based on Gaussian Mixture Model and Logistic Regression

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Chinese Journal of Mechanical Engineering 2011年第5期24卷 879-884页

作者： LIU Wenbin ZHONG Xin LEE Jay LIAO Linxia ZHOU Min chemical Safety Engineering Research Center of Ministry of Education Beijing University of Chemical Technology Beijing 100029 China The First Research institute of Ministry of Public Security Beijing 100048 China National Science Foundation industry/University Cooperative Research Center of Intelligent Maintenance Systems University of Cincinnati Cincinnati OH 45221 USA China National Petroleum corporation Beijing 100007 China

The currently prevalent machine performance degradation assessment techniques involve estimating a machine＇s current condition based upon the recognition of indications of failure features,which entail complete data collected in different ***,failure data are always hard to acquire,thus making those techniques hard to be *** this paper,a novel method which does not need failure history data is *** packet decomposition（WPD） is used to extract features from raw signals,principal component analysis（PCA） is utilized to reduce feature dimensions,and Gaussian mixture model（GMM） is then applied to approximate the feature space ***-channel confidence value（SCV） is calculated by the overlap between GMM of the monitoring condition and that of the normal condition,which can indicate the performance of ***,multi-channel confidence value（MCV）,which can be deemed as the overall performance index of multi-channel,is calculated via logistic regression（LR） and that the task of decision-level sensor fusion is also *** SCV and MCV can serve as the basis on which proactive maintenance measures can be taken,thus preventing machine *** method has been adopted to assess the performance of the turbine of a centrifugal compressor in a factory of Petro-China,and the result shows that it can effectively complete this *** proposed method has engineering significance for machine performance degradation assessment.

关键词： performance degradation assessment Gaussian mixture model logistic regression proactive maintenance sensor fusion

A STUDY OF XPS ON CHARGE-TRANSFER COMPLEXES BETWEEN NITROFLUO-RENONES AND FLUORENE——AN EXAMPLE OF ELECTRON CHARGE-TRANSFER CONJUGATED π SYSTEM

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Chinese Science Bulletin 1985年第3期30卷 334-339页

作者：王殿勋邱家白丁瑞松陈传正岳进 institute of Chemistry Academia Sinica Beijing Research institute of jilin chemical industry corporation Changchun Research institute of jilin chemical industry corporation Changchunt is known that the nitrofluorenone compounds are stronger acceptors which can form charge-transfer complexes with donor compounds such as carbazole and these complexes have been extensively used in the investigation of electrostatic duplication and sensitive film. We have systematically studied these charge-transfer complexes involv-

It is known that the nitrofluorenone compounds are stronger acceptors, which can form charge-transfer complexes with donor compounds such as carbazole, and these complexes have been extensively used in the investigation of electrostatic duplication and sensitive film. We have systematically studied these charge-transfer complexes involv-

关键词： complexes systematically carbazole electrostatic donor involv SYSTEM duplication orbital stronger

Switching Optimally Balanced Fe-N Interaction Enables Extremely Stable Energy Storage

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Energy & Environmental Materials 2023年第2期6卷 275-283页

作者： Zhenzhen Zhao Wei Zhang Miao Liu Dong Wang Xiyang Wang Lirong Zheng Xu Zou Zizhun Wang Dabing Li Keke Huang Weitao Zheng Key Laboratory of Mobile Materials MOE and School of Materials Science&Engineeringand Electron Microscopy Centerand International Center of Future ScienceJilin UniversityChangchun 130012China State Key Laboratory of Chem/Bio-Sensing and Chemometrics Provincial Hunan Key Laboratory for Graphene Materials and DevicesCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China Department of Mechanical and Mechatronics Engineering University of WaterlooWaterloo Canada Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China

The interaction between electrode materials and charge carriers is one of the central issues dominating underlying energy storage *** address the notoriously significant volume changes accompanying intercalation or formation of alloy/compounds,we aim to introduce and utilize a weak,reversible Fe-N interaction during the(de)intercalation of ammonium ions(NH_(4)^(+))within iron(Ⅲ)hexacyanoferrate(FeHCF),inspired by manipulating the electrostatic adsorption between N and Fe in the early stages of ammonia synthesis(Bosch-Harber Process,chemical Engineering)and steel nitriding processes(Metal industry).Such strategy of switching well-balanced Fe-N interaction is confirmed in between the nitrogen of ammonium ions and highspin Fe in FeHCF,as observed by using X-ray absorption *** resulting material provided an extremely stable energy storage(58 mAh g^(-1) after 10000 cycles at current density of 1 A g^(-1))as well as high-rate performance(23.6 mAh g^(-1) at current density of 10 A g^(-1)).

关键词： ammonium ion battery Iron(Ⅲ)hexacyanoferrate reversible Fe-N interaction stability

Research fit under the ＂China Dream＂ background Chinese Wushu industry and traditional culture

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Review of Global Academics 2014年第2期1卷 140-146页

作者： Wang Wen The Physical Education Department of jilin institute of chemical Technology JilinJilin

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基于形状记忆海绵的“门控”液体二极管

Science China Materials 2022年第9期65卷 2591-2599页

作者：宋颖斌来华焦小雨刘鹏昌胡栋栋康红军张东杰樊志敏谢志民刘宇艳江雷成中军 State Key Laboratory of Urban Water Resource&Environment School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Shanghai institute of Space Power-sources/State Key Laboratory of Space Power-sources Technology Shanghai 201100China institute of the Sixth Research institute of China Aerospace Science and industry corporation Hohhot 010000China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

超浸润Janus膜因其独特的单向液体输送能力,被称为“液体二极管”,引起了人们的广泛关注.近年来,赋予Janus膜智能可控性成为一个新的研究热点.然而,相关的报道仍然很少,且限于调节表面浸润性方面,这很难避免一些局限性,如需要恒定外部... 详细信息

超浸润Janus膜因其独特的单向液体输送能力,被称为“液体二极管”,引起了人们的广泛关注.近年来,赋予Janus膜智能可控性成为一个新的研究热点.然而,相关的报道仍然很少,且限于调节表面浸润性方面,这很难避免一些局限性,如需要恒定外部刺激和特定的水溶液.在此,我们提出了一种通过调节材料的孔结构来智能控制液体在Janus膜上渗透的新策略,并报告了一种由超亲水海绵(SHS)和疏水形状记忆海绵(HSMS)构成的智能Janus海绵(SJS).基于良好的形状记忆效应,HSMS的孔径和厚度可以在压缩/回复状态之间可逆地改变.随着HSMS的变化,水的渗透可以得到巧妙地控制,这体现在只有在HSMS处于压缩状态时,SJS才呈现“液体二极管”的效果,否则将防止液体从两侧渗透.最后,基于SJS的智能可控性,我们模拟了换药场景,展示了其在伤口敷料领域的潜在应用.本工作首次报道了一种形状记忆Janus膜,为控制液体渗透提供了一种新的方法,成功地避免了现有浸润性响应Janus膜存在的缺点.鉴于其良好的可控性,我们相信它在液体智能操纵方面有潜在的应用.

关键词： Janus membrane shape memory sponge superwetting smart controllability

A closed-loop process for recycling LiNi_xCo_yMn_((1-x-y))O_2 from mixed cathode materials of lithium-ion batteries

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Green Energy & Environment 2017年第1期2卷 42-50页

作者： Rujuan Zheng Wenhui Wang Yunkun Dai Quanxin Ma Yuanlong Liu Deying Mu Ruhong Li Jie Rena Changsong Dai MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of Technology College of Chemistry and chemical Engineering Qiqihar University College of Animal Science and Veterinary Medicine Jilin University State Key Laboratory of Advanced chemical Power Sources

With the rapid development of consumer electronics and electric vehicles(EV), a large number of spent lithium-ion batteries(LIBs) have been generated worldwide. Thus, effective recycling technologies to recapture a significant amount of valuable metals contained in spent LIBs are highly desirable to prevent the environmental pollution and resource depletion. In this work, a novel recycling technology to regenerate a LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode material from spent LIBs with different cathode chemistries has been developed. By dismantling, crushing,leaching and impurity removing, the LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2(selected as an example of LiNi_xCo_yMn_(1-x-y)O_2) powder can be directly prepared from the purified leaching solution via co-precipitation followed by solid-state synthesis. For comparison purposes, a fresh-synthesized sample with the same composition has also been prepared using the commercial raw materials via the same method. X-ray diffraction(XRD), scanning electron microscopy(SEM) and electrochemical measurements have been carried out to characterize these samples. The electrochemical test result suggests that the re-synthesized sample delivers cycle performance and low rate capability which are comparable to those of the freshsynthesized sample. This novel recycling technique can be of great value to the regeneration of a pure and marketable LiNi_xCo_yMn_(1-x-y)O_2 cathode material with low secondary pollution.

关键词： Spent lithium-ion battery Cathode material recycling Acid leaching Purification Co-precipitation

A general strategy for bimetallic Pt-based nano-branched structures as highly active and stable oxygen reduction and methanol oxidation bifunctional catalysts

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Nano Research 2020年第3期13卷 638-645页

作者： Wenjuan Lei Menggang Li Lin He Xun Meng Zijie Mu Yongsheng Yu Frances MRoss Weiwei Yang Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchun 130103China Ministry of industry and Information Technology Key Laboratory of Critical Materials Technology for New Energy Conversion and StorageSchool of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Bioelectrochemistry&Environmental Analysis of Gansu Province College cf Chemistry&Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China Department of Materials Science and Engineering Massachusetts Institute cf TechnologyCambridgeMA 02139USA

The morphology and size of Pt-based bimetallic alloys are known to determine their electrocatalytic performance in reactions relevant to fuel ***,we report a general approach for preparing Pt-M(M=Fe,Co and Ni)bimetallic nano-branched structure(NBs)by a simple high temperature solution-phase ***-prepared Pt-M NBs show a polycrystalline structure and are rich in steps and kinks on the surface,which promote them favorable bifunctional catalytic properties in acidic electrolytes,specifically in terms of the oxygen reduction reaction(ORR)and methanol oxidation reaction(MOR).Specially,Pt-Co NBs/C catalyst shows 6.1 and 5.3 times higher in specific activity(SA)and mass activity(MA)for ORR than state-of-the-art commercial Pt/C catalysts,***,it exhibits a loss of 4.0%in SA and 14.4%in MA after 10,000 cycles of accelerated durability tests(ADTs)compared with the initial *** addition,we also confirmed the superior MOR activity of Pt-Co NBs/C catalyst in acidic *** Pt-M NBs with other alloying metals,the ORR and MOR activities are both higher than commercial catalysts and are in the sequence of Pt-Co/C>Pt-Fe/C>Pt-Ni/C>commercial Pt/C(or PtRu/C).The improved activities and durability can benefit from the morphological and compositional *** synthesis approach may be applied to develop bifunctional catalysts with enhanced ORR and MOR properties for future fuel cells designs.

关键词： Pt-based bimetallic alloy nano-branched structure electrocatalysts,oxygen reduction reaction methanol oxidation reaction

An road obstacle detection method based on Monocular Measurement

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An road obstacle detection method based on Monocular Measure...

Synthesis,Characterization and Phase Transformation of 3D Open-framework Zinc Phosphate [Zn_6(H_2O)P_5O_(20)][C_5N_2H_(14)][C_6H_(16)N_2]_(0.5)·3H_2O

The International Conference on Recent Trends in Materials and Mechanical Engineering(ICRTMME 2011)

作者： Jin Hongjiao Lin Shen Luo Shiguang jilin institute of chemical Technology Kinetic energy subsidiary of China FAW Group corporation

Obstacle detection in the intelligent vehicle vision navigation system occupies a very important roleThe studies for the obstacles detecting, especially Monocular Measurement from the computer vision, simplifying monocular vision system to camera projection modelGetting the conversion relation between image coordinate and the world coordinate system through the geometry derivation to establish the measurement model and achieve the obstacle measurementThe experiment proved that the error of this measurement model selected is within the acceptable range.

关键词： Monocular Vision Obstacle Detection Monocular Measurement

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chemical Research in Chinese Universities 2009年第4期25卷 407-411页

作者： SONG Yu DONG Zhao-jun WANG Yong-wei FU Jun LI Ji-yang State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Changchun 130012 P. R. China School of Chemistry Engineering ＆ Material Dalian Institute of Light Industry Dalian 116034 P. R. China Geriatric Ward First Hospital of Jilin University Changchun 130021 P R. China

With N,N′-dimethylpiperazine（DMPIP） as the structure-directing agent, a zinc phosphate [Zn6（H2O）P5O20] [C5N2H14] [C6H16N2]0.5·3H2O（1） with a novel three-dimensional（3D） open-framework architecture was hydrothermally synthesized. Its structure was determined by single-crystal X-ray diffraction analysis and further characterized by ICP, NMR, and TG analyses. Compound 1 crystallized in the triclinic space group P1（No.2） with a=0.9984（2） nm, b=1.2354（3） nm, c=1.2384（3） nm, α=88.32（3）°, β=74.57（3）°, γ=75.81（3）° and Z=2. The alternation arrrangement of tetrahedral Zn units[ZnO4 and ZnO3（H2O）] and PO4 units forms an anionic 3D open framework containing intersecting 16-, 10- and 8-ring channels. Water molecules, diprotonated DMPIP, and diprotonated N-methyl-piperazine（MPIP） decomposed from DMPIP, are located in the channels and interact with the host framework via H-bonds. Compound 1 transforms to another new phase（compound 2） upon calcination at 200―350℃ with the removal of the water coordinated to Zn atoms in the lattice. The phase transformation of compound 2 was further studied.

关键词： Hydrothermal Zinc phosphate Phase transformation