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Comprehensive Overview on Computational Intelligence Techniques for Machinery Condition Monitoring and Fault Diagnosis

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Chinese Journal of Mechanical Engineering 2017年第4期30卷 782-795页

作者： Wan Zhang Min-Ping Jia lin zhu Xiao-An Yan School of Mechanical Engineering Southeast UniversityNanjing 211189 China

Computational intelligence is one of the most powerful data processing tools to solve complex nonlinear problems, and thus plays a significant role in intelligent fault diagnosis and prediction. However, only few com- prehensive reviews have summarized the ongoing efforts of computational intelligence in machinery condition moni- toring and fault diagnosis. The recent research and devel- opment of computational intelligence techniques in fault diagnosis, prediction and optimal sensor placement are reviewed. The advantages and limitations of computational intelligence techniques in practical applications are dis- cussed. The characteristics of different algorithms are compared, and application situations of these methods are summarized. Computational intelligence methods need to be further studied in deep understanding algorithm mech- anism, improving algorithm efficiency and enhancing engineering application. This review may be considered as a useful guidance for researchers in selecting a suit- able method for a specific situation and pointing out potential research directions.

关键词： Computational intelligence Machinerycondition monitoring Fault diagnosis Neural networkFuzzy logic Support vector machine - Evolutionaryalgorithms

Numerical investigation on particles removal by bubble flotation in swirling flow

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Journal of Iron and Steel Research International 2022年第6期29卷 961-972页

作者： He-nan Cui Tao Li Yu-lin zhu Min Tan College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and Advanced Materials Chongqing UniversityChongqing 400044China College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210HebeiChina

The removal of particles is of great importance in many fields including effluent treatment,mineral separation,clean metal production,***,most of the researchers paid their attention to the two-phase flow involving gas–liquid or solid–liquid *** motion and interaction between bubbles and particles in the swirling three-phase flow field were simulated by discrete phase *** swirling flow and the collision between bubbles and particles were governed by compiling the user-defined function *** centripetal pressure gradient force pushes the discrete phases toward the central region,where the collision rate between particle and bubbles is improved ***,it proved beneficially for particle removal to increase the swirling velocity,particularly for larger ***,bubble flotation is an effective method to remove particles from the *** swirling velocity was optimized,which is valuable for industrial design.

关键词： Particle removal Swirling flow Blowing bubble Discrete phase model

Expression of Ezrin,HGF,C-met in pancreatic cancer and non-cancerous pancreatic tissues of rats

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Hepatobiliary & Pancreatic Diseases International 2010年第6期9卷 639-644页

作者： Tan, Xing-Guo Yang, zhu-lin Cent S Univ Xiangya Hosp 2 Res Lab Hepatobiliary Dis Changsha 410011 Hunan Peoples R China

BACKGROUND: Recent studies have confirmed that the expression of Ezrin, hepatocyte growth factor (HGF) and its receptor (C-met) is related to the genesis, progress, invasion and metastasis of some malignant tumors. Researches have also found that the biological function of Ezrin is closely related to HGF/C-met in malignant tumors. However, there is no report on the expression levels of Ezrin, HGF and C-met in rat pancreatic cancer induced by dimethylbenzanthracene (DMBA). This study aimed to detect the expression of Ezrin, HGF and C-met in rat pancreatic cancer and non-cancerous pancreatic tissues, and assess its effect in cancer induction by DMBA. METHODS: Ninety Sprague-Dawley rats were divided into 3 groups randomly: 40 in a pancreatic cancer model group (group A), 40 in a trichostatin A (TSA) intervention group (group B), and 10 in a control group (group C). DMBA was directly implanted into the parenchyma of rat pancreas in group A+group B. The rats of group B were treated with 1 ml of TSA saline solution (1 mu g/ml) via intraperitoneal injection weekly. The carcinogenesis of rats executed within 3-5 months in groups A and B was observed by macrograph and microscopy. Meanwhile, the rats in group C were executed within 5 months. The EnVision (TM) immunohistochemistry for detecting the expression levels of Ezrin, HGF and C-met was used in paraffin-embedded sections of the pancreatic specimens. RESULTS: The incidence of pancreatic cancer in group A was 48.6% and in group B 33.3%. The maximal diameter of tumor mass was significantly larger in group A than that in group B (P<0.05). No pathological changes were observed in the pancreas of group C and other main organs of groups A and B. The positive rates of Ezrin, HGF and C-met were significantly higher in ductal adenocarcinoma than in non-cancerous pancreatic tissues of groups A and B (P<0.01). The positive rates of Ezrin, HGF and C-met were significantly higher in ductal adenocarcinoma of group A than those in non-

关键词： pancreatic neoplasms animal model Ezrin hepatocyte growth factor C-met

Fabrication of double-walled carbon nanotube film/TiO_2 nanotube array heterojunctions with length-dependent photoresponse for broad band photodetectors

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International Journal of Minerals,Metallurgy and Materials 2013年第3期20卷 307-312页

作者： Ming-jie Yang Wei Liu Jia-lin Sun Jin-quan Wei Jia-lin zhu Laboratory of Advanced Materials Department of Material Science and Engineering Tsinghua University State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics Tsinghua University Key Laboratory for Advanced Materials Processing Technology of Education Ministry Department of Mechanical Engineering Tsinghua University

A novel photodetector based on double-walled carbon nanotube （DWCNT） film/TiO2 nanotube array （TNA） heterojunctions was fabricated, which exhibited high photoresponse in a broad spectral range. The photoresponse of the detector was dramatically dependent on the length of the TNAs. High photocurrent-to-dark current ratio with a value of 3360 was observed in the visible range by optimizing the lengths of the TNAs. The photosensitive regions could be extended into the near-infrared range. These results reveal that DWCNT film/TNA heterojunctions show potential applications for broad band photodetectors.

关键词： photodetectors titanium dioxide carbon nanotubes heterojunctions

Analytical Result on the Supercurrent Through a Superconductor/Quantum-Dot/Superconductor Junction

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Communications in Theoretical Physics 2002年第7期38卷 103-106页

作者： LI Wei zhu Yu lin Tsung-Han State Key Laboratory for Mesoscopic Physics and Department of Physics Peking University Beijing 100871 China State Key Laboratory for Mesoscopic Physics and Department of Physics Peking University Beijing 100871 China State Key Laboratory for Mesoscopic Physics and Department of Physics Peking University Beijing 100871 China

We present an analytical result for the supercurrent across a superconductor/quantum-dot/superconductor junction. By converting the current integration into a special contour integral, we can express the current as a sum of the residues of poles. These poles are real and give a natural definition of the Andreev bound states. We also use the exact result to explain some features of the supercurrent transport behavior.

关键词： supercurrent, superconductor/quantum-dot/superconductor junction

Efficacy and safety of endoscopic submucosal tunnel dissection for superficial esophageal squamous cell carcinoma and precancerous lesions

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World Journal of Gastroenterology 2018年第26期24卷 2878-2885页

作者： Jin Wang Xiao-Nan zhu lin-lin zhu Wei Chen Yi-Han Ma Tao Gan Jin-lin Yang Department of Gastroenterology and Hepatology West China Hospital of Sichuan University State Key Laboratory of Biotherapy and Cancer Center Sichuan University Department of General Practice West China Hospital of Sichuan University

AIM To evaluate the clinical outcomes of patients who underwent endoscopic submucosal tunnel dissection(ESTD) for esophageal squamous cell carcinoma(ESCC) and precancerous *** ESTD was performed in 289 patients. The clinical outcomes of the patients and pathological features of the lesions were retrospectively *** A total of 311 lesions were included in the analysis. The en bloc rate, complete resection rate, and curative resection rate were 99.04%, 81.28%, and 78.46%, respectively. The ESTD procedure time was 102.4 ± 35.1 min, the mean hospitalization time was 10.3 ± 2.8 d, and the average expenditure was 3766.5 ± 846.5 dollars. The intraoperative bleeding rate was 6.43%, the postoperative bleeding rate was 1.61%, the perforation rate was 1.93%, and the postoperative infection rate was 9.65%. Esophageal stricture and positive margin were severe adverse events, with an incidence rate of 14.79% and 15.76%, respectively. No tumor recurrence occurred during the follow-up period. CONCLUSION ESTD for ESCC and precancerous lesions is feasible and relatively safe, but for large mucosal lesions, the rate of esophageal stricture and positive margin is high.

关键词： Superficial esophageal squamous cell carcinoma Endoscopic submucosal tunnel dissection Efficiency Safety Esophageal stricture

Preparation of SiC powders by carbothermal reduction with bamboo charcoal as renewable carbon source

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Journal of Advanced Ceramics 2013年第2期2卷 128-134页

作者： Xingzhong GUO lin zhu Wenyan LI Hui YANG Department of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Bamboo charcoal was expected to be a renewable carbon source for carbide materials in carbothermal reduction because of its superior *** powders with characteristic shapes were fabricated by carbothermal reduction with industrial silica sol and bamboo charcoal particles as silicon and carbon sources respectively,and the effects of reacting temperature and time on shape evolutions and properties of the as-prepared SiC powders were *** silica sol/bamboo charcoal system was firstly transformed into SiO_(2)/C system by the transition of silica sol and graphitization of bamboo charcoal,and the carbothermal reduction between SiO_(2) and C occurred at/above 1600℃.The characteristic shapes of SiC particles were transformed from string-beads-like to dumbbell-like and rod-like with the increase of reacting *** prepared SiC powders are expected to become new raw material for silicon carbide ceramic composites.

关键词： carbides chemical synthesis X-ray diffraction(XRD) microstructure

NR4A1 agonist cytosporone B attenuates neuroinflammation in a mouse model of multiple sclerosis

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Neural Regeneration Research 2022年第12期17卷 2765-2770页

作者： Hai-Zhen Yu Bing-Qing zhu lin zhu Shuo Li Li-Mei Wang Department of Neurology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina

Nuclear receptor subfamily 4 group A1(NR4A1)is an orphan nuclear receptor,which is expressed in the majority of ***4A1 expression in peripheral blood mononuclear cells is low during the preclinical stage of multiple *** of the Nr4a1 gene in mice can aggravate the symptoms of experimental autoimmune encephalomyelitis(EAE),which is an animal model of multiple *** this study,we intragastrically administered the NR4A1 agonist cytosporone B(Csn-B)to mice after inducing *** treatment with Csn-B,the clinical symptoms in the EAE mice were substantially attenuated compared with that in PBS-treated control *** percentages of CD4+T cells and F4/80+cells in the central nervous system were *** addition,interferon-γand interleukin-17 production by proinflammatory Th1/Th17 cells in the central nervous system and interferon-γlevels in splenocytes were decreased after Csn-B *** findings suggest that the NR4A1 agonist Csn-B can alleviate nerve injury after EAE induction,and,therefore,may be useful as a potential treatment for multiple sclerosis.

关键词： cytosporone B(Csn-B) experimental autoimmune encephalomyelitis macrophages microglia multiple sclerosis NR4A1 agonist NR4A1 Th1 Th17 treatment

Growth responses of gypsy moth larvae to elevated CO2： the influence of methods of insect rearing

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Insect Science 2011年第4期18卷 409-418页

作者： Lan-zhu Ji lin-Li An Xiao-Wei Wang Biodiversity Group Institute of Applied Ecology Chinese Academy of Sciences Shenyang China

The effects of elevated CO2 on foliar chemistry of two tree species （Populus pseudo-simonii Kitag. and Betula platyphylla） and on growth of gypsy moth （Lymantria dispar L.） larvae were examined. Furthermore, we focused on the comparison of results on the growth responses of larvae obtained from two methods of insect rearing, the nochoice feeding trial performed in the laboratory or in situ in open-top chambers. On the whole, both primary and secondary metabolites in the leaves of the two tree species were significantly affected by main effects of time （sampling date）, CO2 and species. Elevated CO2 significantly increased the C： N ratio and concentrations of the soluble sugar, starch, total nonstructural carbohydrates, total phenolics and condensed tannins, but significantly decreased the concentration of nitrogen. Higher contents of total phenolics and condensed tannins were detected in the frass of larvae reared in elevated CO2 treatments. Overall, the growth of gypsy moth larvae were significantly inhibited by elevated CO2 and CO2- induced changes in leaf quality. Our study did not indicate the two methods of insect rearing could influence the direction of effects of elevated CO2 on the growth of individual insects; however, the magnitude of negative effects of elevated CO2 on larval growth did differ between the two insect rearing methods, and it seems that the response magnitude was also mediated by larval age and host plant species.

关键词： elevated CO2 leaf quality Lymantria dispar no-choice feeding open-topchamber