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The Research of Ellipse Parameter Fitting Algorithm of Ultrasonic Imaging Logging in the Casing Hole

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Applied Mathematics 2014年第8期5卷 1317-1321页

作者： jihui Tu Bin yang Electronic Information Engineering School of HEBI College of Vocation and Technology Henan China Electronics & Information School of yangtze University Jingzhou China

In order to estimate intensity and direction of pressure acted on oil well in horizontal, this paper proposes an algorithm of ellipse fitting based on least square method for sections of oil well with ultrasonic imaging logging data. Five parameters about ellipse corresponding to the sections of oil well are extracted and their geometry deformations and direction are estimated. The tested results show that the fitting algorithm is robust and the estimating error of parameter is small, which have very important practical significance on processing the well logging.

关键词： BHTV Ellipse Fitting Image Correction Tool Eccentricity

Enhancement of salinomycin production by ribosome engineering in Streptomyces albus

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Science China(Life Sciences) 2019年第2期62卷 276-279页

作者： Dong Li jihui Zhang Yuqing Tian Huarong Tan State Key Laboratory of Microbial Resources Institute of Microbiology Chinese Academy of Sciences College of Life Sciences University of Chinese Academy of Sciences

Dear Editor,Streptomyces can produce a large variety of secondary metabolites as a major source of anti-infective, antitumor or immune-suppressive agents widely applied in clinical treatment. Antibiotics-resistant bac... 详细信息

关键词： Enhancement of salinomycin production by ribosome engineering in Streptomyces albus

Dynamics of Above-and Below-ground Biomass and C,N,P Accumulation in the Alpine Steppe of Northern Tibet

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Journal of Mountain Science 2011年第6期8卷 838-844页

作者： LU Xuyang YAN Yan FAN jihui CAO Yingzi WANG Xiaodan Key Laboratory of Mountain Environment Evolvement and Regulation Institute of Mountain Hazards and Environment CAS Chengdu 610o41 China Shenzha Alpine Steppe and Wetland Ecosystem Observation and Experiment Station Institute of Mountain Hazards and Environment CAS Shenzha 85310o China

The temporal dynamics of the biomass, as well as the carbon （C）, nitrogen （N）, phosphorus （P） concentrations and accumulation contents, in above- and below-ground vegetation components were determined in the alpine steppe vegetation of Northern Tibet during the growing season of 2OLO. The highest levels of total biomass （311.68 g m-2）, total C （115.95 g m-2）, total N （2.60 g m-2）, and total P （0.90 g m-2） accumulation contents were obtained in August in 2010. Further, biomass and nutrient stocks in the below-ground components were higher than those of the above-ground components. The dominant species viz., Stipa purpurea and Carex moorcrofli had lower biomass and C, N, P accumulations than the companion species which including Oxytropis. spp., Artemisia capillaris Thunb., Aster tataricus L., and SO on.

关键词： Biomass Nutrient concentration Nutrient accumulation Alpine steppe Northern Tibet

A widespread response of Gram-negative bacterial acyl-homoserine lactone receptors to Gram-positive Streptomyces γ-butyrolactone signaling molecules

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Science China(Life Sciences) 2021年第10期64卷 1575-1589页

作者： Xiang Liu Wenxi Wang Junyue Li Yue Li jihui Zhang Huarong Tan State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China

Cell-cell communication is critical for bacterial survival in natural habitats,in which miscellaneous regulatory networks are ***,elucidating the interaction networks of a microbial community has been hindered by the population *** study reveals thatγ-butyrolactone(GBL)molecules from Streptomyces species,the major antibiotic producers,can directly bind to the acyl-homoserine lactone(AHL)receptor of Chromobacterium violaceum and influence violacein production controlled by the quorum sensing(QS)***,the widespread responses of more Gram-negative bacterial AHL receptors to Gram-positive Streptomyces signaling molecules are *** on the cross-talk between GBL and AHL signaling systems,combinatorial regulatory circuits(CRC)are designed and proved to be workable in Escherichia coli(***).It is significant that the QS systems of Gram-positive and Gram-negative bacteria can be bridged via native Streptomyces signaling *** findings pave a new path for unlocking the comprehensive cell-cell communications in microbial communities and facilitate the exploitation of innovative regulatory elements for synthetic biology.

关键词： signaling communication cross-talk Gram-positive bacteria Streptomyces γ-butyrolactone Gram-negative bacteria acyl-homoserine lactone synthetic biology combinatorial regulatory circuit

Retrieval of dislodged AmplifEYE using balloon dilator during colonoscopy

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Gastroenterology Report 2019年第2期7卷 139-140,I0002页

作者： jihui Li Luke Blake Steven D.Wexner Department of General Surgery Paris Community HospitalParisILUSA Department of Colorectal Surgery Cleveland Clinic FloridaWestonFLUSA

AmplifEYE can increase the detection rate of adenomatous polyps and stabilize the mucosa for easy biopsy and *** it can also become a foreign body when it is dislodged during the *** report a case of dislodged AmplifE... 详细信息

关键词： colonoscopy AmplifEYE foreign-body retrieval balloon dila

Multi-omics Data Reveal the Effect of Sodium Butyrate on Gene Expression and Protein Modification in Streptomyces

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Genomics, Proteomics & Bioinformatics 2023年第6期21卷 1149-1162页

作者： Jiazhen Zheng Yue Li Ning Liu jihui Zhang Shuangjiang Liu Huarong Tan State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Microbial Biotechnology Shandong UniversityQingdao 266237China

Streptomycetes possess numerous gene clusters and the potential to produce a large amount of natural *** deacetylase(HDAC)inhibitors play an important role in the regulation of histone modifications in fungi,but their roles in prokaryotes remain poorly ***,we investigated the global effects of the HDAC inhibitor,sodium butyrate(SB),on marine-derived Streptomyces olivaceus FXJ 8.021,particularly focusing on the activation of secondary metabolite *** antiSMASH analysis revealed 33 secondary metabolite biosynthetic gene clusters(BGCs)in strain FXJ 8.021,among which the silent lobophorin BGC was activated by *** data showed that the expression of genes involved in lobophorin biosynthesis(ge00097–ge00139)and CoA-ester formation(e.g.,ge02824),as well as the glycolysis/gluconeogenesis pathway(e.g.,ge01661),was significantly up-regulated in the presence of *** CoA-ester analysis confirmed that SB triggered the biosynthesis of CoA-ester,thereby increasing the precursor supply for lobophorin *** acetylomic analysis revealed that the acetylation levels on 218 sites of 190 proteins were up-regulated and those on 411 sites of 310 proteins were *** acetylated proteins were particularly enriched in transcriptional and translational machinery components(e.g.,elongation factor GE04399),and their correlations with the proteins involved in lobophorin biosynthesis were established by protein–protein interaction network analysis,suggesting that SB might function via a complex hierarchical.

关键词： Silent gene cluster Streptomyces Sodium butyrate Protein modification Acetylome

Incorporating a rainfall intensity modification factorγinto the I a-S Relationship in the NRCS-CN method

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International Soil and Water Conservation Research 2020年第3期8卷 237-244页

作者： Pengcheng Hu Jialiang Tang jihui Fan Shumiao Shu Zhaoyong Hu Bo Zhu Key Laboratory of Mountain Environment Evolution and Regulation Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu610041China University of Chinese Academy of Sciences BeijingChina

The Natural Resources Conservation Service runoff curve number(NRCS-CN)method is widely used to simulate direct runoff,but the impact of rainfall intensity has not been *** this study,a rainfall intensity modification factor(γ)was incorporated into the Ia-S relationship of the NRCS-CN method,and the modified method(NRCS-CN-γ)was compared with the NRCS-CN method withλ=0.2 andλ=0.05 in three watersheds of the Walnut Gulch Experimental Watershed(WGEW).The results showed that for 2016-2018 period,the simulation performance of the NRCS-CN-γmethod was close to the NRCS-CN(λ=0.05)method and better than the NRCS-CN(λ=0.2)*** the new data(2009 data with high variance)was added,the significant improvement was observed by NRCS-CN-γmethod with all the evaluation parameters being the best in the three watersheds,indicating a more adapted capa-bility of the modified method with highly uneven rainfall *** covariance between rainfall intensity and the simulated runoff were 19.01,15.14,and 16.35 for the three methods,*** the optimal CN changed,the relative errors representing CN sensitivity were 6.25,6.49 and 17.39 for the methods,*** is suggested that the NRCS-CN-γmethod outperformed the other two methods and could contribute to a more accurate estimation of direct runoff where rainfall intensity greatly varied,especially in monsoon region or under the context of climate change.

关键词： Climate change Rainfall intensity Runoff NRCS-CN method CN sensitivity

Integrating a weighted-average method into the random walk framework to generate individual friend recommendations

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Science China(Information Sciences) 2017年第11期60卷 43-64页

作者： Jibing GONG Xiaoxia GAO Hong CHENG jihui LIU Yanqing SONG Mantang ZHANG Yi ZHAO School of Information Science and Engineering Yanshan University The Key Lab for Computer Virtual Technology and System Integration Yanshan University State Key Lab of Mathematical Engineering and Advanced Computing Department of Systems Engineering and Engineering Management The Chinese University of Hong Kong

Friend recommendation is a fundamental service in both social networks and practical applications,and is influenced by user behaviors such as interactions, interests, and activities. In this study, we first conduct in-depth investigations on factors that affect recommendation results. Next, we design Friend++, a hybrid multi-individual recommendation model that integrates a weighted average method(WAM) into the random walk(RW) framework by seamlessly employing social ties, behavior context, and personal information. In Friend++, the first plus signifies recommending a new friend through network features, while the second plus stands for using node features. To verify our method, we conduct experiments on three social datasets crawled from the Sina microblog system(Weibo). Experimental results show that the proposed method significantly outperforms six baseline methods in terms of recall, precision, F1-measure, and MAP. As a final step, we describe a case study that demonstrates the scalability and universality of our method. Through discussion, we reach a meaningful conclusion: although common interests are more important than user activities in making recommendations, user interactions may be the most important factor in finding the most appropriate potential friends.

关键词： multi-individual friend recommendation architecture behavior context analysis Intimacy degree random walk framework social networks

A New Adaptive Inventory Control Method For Supply Chains With Non-stationary Demand

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A New Adaptive Inventory Control Method For Supply Chains Wi...