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Research on the applications of infrared technique in the diagnosis and prediction of diesel engine exhaust fault

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Journal of Thermal Science 2011年第2期20卷 189-194页

作者： Lv Shi-gui yang li yang Qian Department of Power Engineering Naval University of Engineering Wuhan 430033 China

This paper mainly introduces the basic principles,the methods and the applications of infrared technique in the diagnosis and prediction of diesel engine exhaust faults. The test-bed for monitoring diesel engine exhaust faults by thermal infrared imager has been designed. In different running conditions, the exterior surface radiation temperatures of the exhaust pipe of the 6135G-1 diesel engine have been measured by infrared imaging system. According to the principle of infrared temperature measurement, the real temperatures of the exterior surface of the exhaust pipe have been calculated. Based on the principle of heat transfer, the method of calculating the exhaust temperatures according to the exterior surface radiation temperatures of exhaust pipe measured by thermal infrared imager is built. The relationship between diesel engine exhaust temperatures and faults has been analyzed. It is shown that the application of infrared inspection and diagnosis to the identifying of diesel engine exhaust faults is feasible and effective.

关键词： infrared exhaust temperature infrared diagnosis diesel engine fault

Gesture Recognition Based on BP Neural Network Improved by Chaotic Genetic Algorithm

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International Journal of Automation and computing 2018年第3期15卷 267-276页

作者： Dong-Jie li yang-yang li Jun-Xiang li Yu Fu School of Automation Harbin University of Science and Technology

Aim at the defects of easy to fall into the local minimum point and the low convergence speed of back propagation（BP）neural network in the gesture recognition, a new method that combines the chaos algorithm with the genetic algorithm（CGA） is proposed. According to the ergodicity of chaos algorithm and global convergence of genetic algorithm, the basic idea of this paper is to encode the weights and thresholds of BP neural network and obtain a general optimal solution with genetic algorithm, and then the general optimal solution is optimized to the accurate optimal solution by adding chaotic disturbance. The optimal results of the chaotic genetic algorithm are used as the initial weights and thresholds of the BP neural network to recognize the gesture. Simulation and experimental results show that the real-time performance and accuracy of the gesture recognition are greatly improved with CGA.

关键词： Gesture recognition back propagation (BP) neural network chaos algorithm genetic algorithm data glove.

Microbes as a production host to produce natural active compounds from mushrooms:biosynthetic pathway elucidation and metabolic engineering

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Chinese Journal of Natural Medicines 2021年第8期19卷 580-590页

作者： yang li-yang GONG Qiang GUO Jian-Quan li Gui-Lan School of Basic Medical Sciences Shanxi University of Chinese MedicineJinzhong 030619China School of Public Health Shanxi Medical UniversityTaiyuan 030001China

Mushrooms are abundant in bioactive natural *** to strict growth conditions and long fermentation-time,microbe as a production host is an alternative and sustainable approach for the production of natural *** review focuses on the biosynthetic pathways of mushroom originated natural compounds and microbes as the production host for the production of the above natural compounds.

关键词： Mushroom Natural compound Microbes Synthetic biology Metabolic engineering

Bestow metal foams with nanostructured surfaces via a convenient electrochemical method for improved device performance

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Nano Research 2016年第8期9卷 2364-2371页

作者： Yawen Zhan Shanshan Zeng Haidong Bian Zhe li Zhengtao Xu Jian LU yang yang li Center of Super-Diamond and Advanced Films (COSDAF) City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong China Department of Physics and Materials Science City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong China Department of Chemistry and Biology City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong China Department of Mechanical and Biomedical Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong China Centre for Advanced Structural Materials City University of Hong Kong Shenzhen Research Institute 8 Yuexing 1st Road ShenzhenHi-Tech Industrial Park Nanshan District Shenzhen 518000 China City University ofHong Kong Shenzhen Research Institute 8 Yuexing 1st Road Shenzhen Hi-Tech Industrial Park Nanshan District Shenzhen 518000 China

Metal foams have been intensively studied as three-dimensional （3-D） bulk mass-support for various applications because of their high conductivities and attractive mechanical properties. However, the relatively low surface area of conventional metal foams largely limits their performance in applications such as charge storage. Here, we present a convenient electrochemical method for addressing this problem using Cu foams as an example. High surface area Cu foams are fabricated in a one-pot one-step manner by repetitive electrodeposition and dealloying treatments. The obtained Cu foams exhibit greatly improved performance for different applications like surface enhanced Raman spectroscopy （SERS） substrates and 3-D bulk supercapacitor electrodes.

关键词： electrodeposition dealloying metal foams surface enhanced Ramanspectroscopy substrates supercapacitors

Effects of Headgroups and Serum on Gene Transfection of Alkaline Amino Acid Based Cationic lipids

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Chemical Research in Chinese Universities 2009年第1期25卷 69-71页

作者： li li yang yang NIE Yu HE Bin GU Zhong-wei National Engineering Research Center for Biomaterials Sichuan University Chengdu 610064 P. R. China

Three cationic lipids with lysylated（1）, histidylated（2）, and arginylated（3） headgroups and cholesterol hydrophobic moiety were synthesized. The average sizes of liposomes and lipoplexes were around 100 and 160 nm, respectively. The gene transfection efficiency of the three lipoplexes loaded with pGL3 or pORF-LacZ was compared on 293T cells in the presence or the absence of serum. The transfection efficiency of the three lipoplexes in a serum-free medium was 2 to 3-fold higher than that of dioleoyl-trimethylammonium propane（DOTAP）. In the presence of serum, however, most of the lipoplexes showed lower transfection activities; only lipoplex 3 retained its high transfection efficiency.

关键词： Cationic lipids Alkaline amino acids Serum Gene delivery Transfection efficiency

A meshfree-based local Galerkin method with condensation of degree of freedom for elastic dynamic analysis

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Acta Mechanica Sinica 2014年第1期30卷 92-99页

作者： De-An Hu Yi-Gang Wang yang-yang li Xu Han Yuan-Tong Gu State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University School of Chemistry Physics and Mechanical EngineeringQueensland University of Technology

Condensation technique of degree of freedom is first proposed to improve the computational efficiency of meshfree method with Galerkin weak form for elastic dy- namic analysis. In the present method, scattered nodes with- out connectivity are divided into several subsets by cells with arbitrary shape. Local discrete equation is established over each cell by using moving Kriging interpolation, in which the nodes that located in the cell are used for approxima- tion. Then local discrete equations can be simplified by con- densation of degree of freedom, which transfers equations of inner nodes to equations of boundary nodes based on cells. The global dynamic system equations are obtained by as- sembling all local discrete equations and are solved by using the standard implicit Newmark＇s time integration scheme. In the scheme of present method, the calculation of each cell is carried out by meshfree method, and local search is imple- mented in interpolation. Numerical examples show that the present method has high computational efficiency and good accuracy in solving elastic dynamic problems.

关键词： Meshfree method Local Galerkin method Moving Kriging interpolation - Condensation of degree of freedom Computational efficiency

Laparoscopic treatment of inflammatory myofibroblastic tumor in liver: A case report

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World Journal of Clinical Cases 2022年第32期10卷 11853-11860页

作者： yang-yang li Jin-Feng Zang Chi Zhang Department of Hepatobiliary Surgery Taizhou People’s HospitalThe Fifth Affiliated Hospital of Medical School of Nantong UniversityTaizhou 225300Jiangsu ProvinceChina

BACKGROUND Inflammatory myofibroblastic tumor in the liver(IMTL) is a rare borderline mesenchymal *** clinical symptoms nor laboratory tests have absolute specificity for the diagnosis of IMTL,and imaging also lacks obvious *** there are sporadic reports of recurrence after surgical treatment,surgical resection is the mainstay of *** SUMMARY A 29-year-old man complained of general weakness,slight discomfort in the upper abdomen,with a history of upper respiratory tract infection for 1 wk before *** and enhanced upper abdominal magnetic resonance imaging showed a mass in liver segments Ⅱ and Ⅲ(48 mm × 53 mm).He was treated by laparoscopic left lateral *** pathological examination with hematoxylin and eosin staining suggested that the mass in liver segments Ⅱ and Ⅲ was *** 21 mo postoperative follow-up,no obvious residual or recurrent lesions were *** There is a risk of malignant degeneration in *** principal choice of treatment is laparoscopic left lateral segmentectomy.

关键词： Inflammatory myofibroblastic tumor Hepatectomy Laparoscopy liver Case report

Differentiation of human umbilical cord blood stem cells into hepatocytes in vivo and in vitro

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World Journal of Gastroenterology 2006年第25期12卷 4014-4019页

作者： Xiao-Peng Tang Min Zhang Xu yang li-Min Chen yang Zeng Research Center of liver Diseases the Second Xiangya Hospital Central South University Changsha 410011 Hunan Province China

AIM： To study the condition and potentiality of human umbilical cord blood stem cells （HUCBSC） to differentiate into hepatocytes in vivo or in vitro. METHODS： In a cell culture study of human umbilical cord blood stem cell （HUCBSC） differentiation, human umbilical cord blood mononuclear cells （HUCBMNC） were separated by density gradient centrifugation. Fibroblast growth factor （FGF） and hepatocyte growth factor （HGF） and the supernatant of fetal liver were added in the inducing groups. Only FGF was added in the control group. The expansion and differentiation of HUCBMNC in each group were observed. Human alpha fetoprotein （AFP） and albumin （ALB） were detected by immunohistochemistry. In the animal experiments, the survival SD rats with acute hepatic injury after carbon tetrachloride （CCL4） injection 48 h were randomly divided into three groups. The rats in group A were treated with human umbilical cord blood serum. The rats in group B were treated with HUCBMNC transplantation. The rats in group C were treated with HUCBMNC transplantation followed by intraperitoneal cyclophosphamide for 7 d. The rats were killed at different time points after the treatment and the liver tissue was histopathologically studied and human AFP and ALB detected by immunohistochemistry. The human X inactive-specific transcript gene fragment in the liver tissue was amplified by PCR to find human DNA. RESULTS： The results of cell culture showed that adherent cells were stained negative for AFP or ALB in control group. However, the adherent cells in the inducing groups stained positive for AFP or ALB. The result of animal experiment showed that no human AFP or ALB positive cells present in the liver tissue of group A （control group）. However, many human AFP or ALB positive cells were scattered around sinus hepaUcus and the central veins of hepatic Iobules and in the portal area in group B and group C after one month. The fragment of human X chromagene could be detected in the liver tissue

关键词： Umbilical cord blood Stem cell liver failure Cell transplantation Cell differentiation

Virtual machine placement optimizing to improve network performance in cloud data centers

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The Journal of China Universities of Posts and Telecommunications 2014年第3期21卷 62-70页

作者： DONG Jian-kang WANG Hong-bo li yang-yang CHENG Shi-duan State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications

With the wide application of virtualization technology in cloud data centers, how to effectively place virtual machine （VM） is becoming a major issue for cloud providers. The existing virtual machine placement （VMP） solutions are mainly to optimize server resources. However, they pay little consideration on network resources optimization, and they do not concern the impact of the network topology and the current network traffic. A multi-resource constraints VMP scheme is proposed. Firstly, the authors attempt to reduce the total communication traffic in the data center network, which is abstracted as a quadratic assignment problem; and then aim at optimizing network maximum link utilization （MLU）. On the condition of slight variation of the total traffic, minimizing MLU can balance network traffic distribution and reduce network congestion hotspots, a classic combinatorial optimization problem as well as NP-hard problem. Ant colony optimization and 2-opt local search are combined to solve the problem. Simulation shows that MLU is decreased by 20%, and the number of hot links is decreased by 37%.

关键词： cloud computing data center network virtual machine placement traffic engineering network performance