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Assessment of landslide susceptibility using DBSCAN-AHD and LD-EV methods

Journal of Mountain Science 2022年第1期19卷 184-197页

作者： MAO yi-min MWAKAPESA Deborah S LI yi-can XU Kai-bin NANEHKARAN Yaser A ZHANG Mao-sheng School of Information Engineering Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory for Geo-hazards in Loess Area Xi’an 710054China Northwest Nonferrous Geological mining Group Limited Company Xi’an 710054China

Landslide susceptibility assessment plays a vital role in understanding landslide information in advance and taking preventive as well as control measures. The need to initially specify the number of clusters, difficulty in handling noise and quantifying rainfall data, limits the application of traditional clustering models in landslide susceptibility assessment which then lowers their performance accuracy. Thus, to overcome these limitations, this study proposed an improved clustering algorithm titled the DBSCAN-AHD algorithm, which combines the traditional DBSCAN(Density Based Spatial Clustering of Application with Noise) algorithm and an Adaptive Hausdorff Distance(AHD) for landslide susceptibility modeling. Firstly, AHD was introduced to the traditional DBSCAN to quantify rainfall. Then,the DBSCAN-AHD grouped the mapping units with similar topology and geology characteristics into subclasses without specifying the number of clusters in advance for its ability to handle noise in the ***, the LD-EV(landslide density or eigenvalues) approach was introduced to obtain the susceptibility levels using K-means algorithm. Finally,to verify the model’s performance, statistical indices and the area under the curve(AUC) were applied and compared to the traditional DBSCAN, KPSO, Kmeans and Hierarchical Clustering algorithms,whereby, the proposed model outperformed the others. Also, the obtained susceptibility map can provide references in taking relevant preventive and control measures.

关键词： Landslide susceptibility DBSCAN Machine learning algorithm Uncertain data Clustering algorithm

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How Sense of Ritual in Tourism Impacts Tourists’Co-Creation of Tourism Experience Values:A Study Based on the Theory of Value Co-Creation

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Contemporary Social Sciences 2024年第2期9卷 67-84页

作者： yi min Zhang Guangyu Sun Genjin Southwest minzu University ChengduSichuan610041China Sichuan Agricultural University

Establishing a sense of ritual within tourism consumption scenarios offers tourists the opportunity for interactive *** upon the value co-creation theory,this study constructed an influence mechanism model to examine tourists'active engagement in the process of co-creating tourism experience *** employed Partial Least Squares Structural Equation Modeling(PLS-SEM)to empirically test the proposed *** findings demonstrate that the model constructed in the present study exhibits robust reliability,validity,and explanatory *** perception of the sense of ritual in tourism exerts a significant positive influence on tourists’co-creation of tourism experience values,thereby significantly enhancing both the communitas and flow experienced by tourists during their ***,such communitas and flow can mediate the influence of the sense of ritual in tourism on tourists’co-creation of tourism experience *** study contributes to advancing the current research on tourists’co-creation of tourism experience values and the sense of ritual in tourism,thereby providing theoretical foundations for cultivating a sense of ritual within tourism consumption scenarios.

关键词： sense of ritual in tourism tourists’co-creation of tourism experience values theory of value co-creation theory of Interaction Ritual Chains

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Imaging for thinned perforator flap harvest:current status and future perspectives

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Burns & Trauma 2021年第1期9卷 36-46页

作者： yi min Khoong Xin Huang Shuchen Gu Tao Zan Department of Plastic and Reconstructive Surgery Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai200011China

With advances in anatomical knowledge and technology,increased interest has been directed towards reconstruction with enhanced aesthetic and functional outcomes.A myriad of thinned perforator flap harvest approaches have been developed for this purpose;however,concerns about jeopardizing their vascularity *** ensure optimum reconstructive outcome without hampering the flap’s microcirculation,it is important to make good use of the existing advanced imaging modalities that can provide clear visualization of perforator branches,particularly in the adipose layer,and an accurate assessment of flap ***,this review will highlight the imaging modalities that have been utilized for harvesting a thinned perforator flap from these two perspectives,along with future insights into creating both functionally and aesthetically satisfying,yet simultaneously safe,thinned perforator flaps for the best reconstructive outcomes for patients.

关键词： Perforator flap Imaging Surgical guidance Preoperative imaging Intraoperative guidance Flap perfusion Flap thinning Thinned flap

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Revisiting Controlled Quantum Secure Direct Communication Using a Non-symmetric Quantum Channel with Quantum Superdense Coding

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Communications in Theoretical Physics 2008年第4期49卷 887-890页

作者： LIU Jun LIU yi-min XIA Yan ZHANG Zhan-Jun Key Laboratory of Optoelectronic Information Acquisition ＆ Manipulation of ministry of Education of China School of Physics ＆ Material Science Anhui University Hefei 230039 China Department of Physics Shaoguan University Shaoguan 512005 China School of Physic and Optoelectronic Dalian University of Technology Dalian 116024 China

Recently Xia and Song [Phys. Lett. A 364 （2007） 117] have proposed a controlled quantum secure direct communication （CQSDC） protocol. They claimed that in their protocol only with the help of the controller Charlie, the receiver Alice can successfully extract the secret message from the sender Bob. In this letter, first we will show that within their protocol the controller Charlie＇s role could have been excluded if it were not for their unreasonable design. We then revise the Xia-Song CQSDC protocol such that its original advantages are reta/ned and the CQSDC can be really realized.

关键词： quantum secure direct communication quantum superdense coding non-symmetric quantumchannel

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Theoretical Study of Non-heme Mn(V)-oxo Complexes:Formation Mechanism,Electronic Nature,and Hydroxylation Reactivity

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Chinese Journal of Structural Chemistry 2021年第12期40卷 1557-1566,1551页

作者： WEN Zi-Hao LI Shuang ZHANG min-yi College of Chemistry and Material Science Fujian Normal UniversityFuzhou 350007China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Many non-heme manganese complexes exhibit high reactivity and enantioselectivity for the activation of C-H ***,Mn(PDP)complexes(PDP=N,N'-bis(pyridine-2-ylmethyl)-2,2,-bipyrrolidine)have been reported to activate C-H bonds selectively in the presence of carboxylic *** this study,we performed density functional theory calculations to investigate the formation and hydroxylation mechanisms of Mn(PDP)*** calculation results showed that Mn(Ⅲ)(PDP)complexes react with H_(2)O_(2) and carboxylic acid to form Mn(V)-oxo oxidation *** main oxidation intermediate,[(PDP)Mn(IV)(O…OC(O)CH_(3))^(2-)·]^(2+),was found to have the characteristics of S(Mn)=3/2 manganese(IV)center antiferromagnetically coupled to a σ^(*)_(O-O) radical,where the O-O bond is not completely ***,[(PDP)Mn(IV)(O…OC(O)CH_(3)^(2-)·]^(2+) was shown to have two single electron-accepting orbitals(α Mn-d_(xy) and βσ^(*)_(O-O))that can simultaneously interact with a doubly occupied electron-donating orbital(σ_(C-H))of ***,[(PDP)Mn(IV)(O…OC(O)CH_(3)^(2-)·]^(2+) species can act as a two-electron oxidant for the C-H bond *** a result,the C-H bond hydroxylation by [(PDP)Mn(IV)(O…OC(O)CH_(3)^(2-)·]^(2+) species was a single *** the H-abstraction with a low barrier of 4.5 kcal/mol,hydroxyl group would immediately rebound to the radical carbon without *** results provide new insights toward the further development of non-heme manganese catalysts.

关键词： C-H bond activation non-heme manganese complex homogeneous catalysis density functional theory calculations

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Identification and determination of major constituents in a traditional Chinese medicine compound recipe Xiongdankaiming tablet using HPLC-PDA/ESI-MS^n and HPLC-UV/ELSD

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第7期14卷 604-614页

作者： Shu-fang WANG Jing LENG yi-min XU Mei-ling FENG Institute of Pharmaceutical Informatics Zhejiang University School of Pharmaceutical Sciences Zhejiang University of Technology

Xiongdankaiming tablet (XDKMT), a well-known compound in traditional Chinese medicine, is widely used for the treatment of acute iridocyclitis and primary open-angle glaucoma. In this paper, accurate and reliable methods were developed for the identification of 20 constituents using high-performance liquid chromatography with photodiode array and electron spray ionization-mass spectrometry (HPLC-PDA/ESI-MSn ), and determination of nine of the constituents (chlorogenic acid, gentiopicroside, isochlorogenic acid B, diosmetin-7-O-β-D-glucopyranoside, apigenin, diosmetin, tauroursodeoxycholic acid, acacetin, and taurochenodeoxycholic acid) was developed using HPLC with ultraviolet absorption detector and evaporative light scattering detector (HPLC-UV/ELSD) for the first time. The best results were obtained on a Zorbax SB-C18 column with gradient elution using water (0.1% formic acid) (A) and methanol (0.1% formic acid) (B) at a flow rate of 0.7 ml/min. Tauroursodeoxycholic acid and taurochenodeoxycholic acid, owing to their low UV absorption, were detected by ELSD. The other seven compounds were analyzed by HPLC-UV with variable wavelengths. The calibration curves of all nine constituents showed good linear regression (R2 >0.9996) within the linearity ranges. The limits of detection and quantification were in the ranges of 0.0460-9.90 μg/ml and 0.115-24.8 μg/ml, respectively. The accuracy, in terms of recovery, varied from 95.3% to 104.9% with relative standard deviations (RSDs) less than 4.4%. Precision (with the intra- and inter-day variations less than 4.4%) was also suitable for its intended use. The developed method was successfully applied for the analysis of major components in XDKMT, which provides an appropriate method for the quality control of XDKMT.

关键词： Traditional Chinese medicine (TCM) compound recipe Xiongdankaiming tablet HPLC-UV/ELSD HPLC-MS Quality control

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Remote Preparation of Three-Particle GHZ Class States

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Communications in Theoretical Physics 2008年第2期49卷 359-364页

作者： LIU yi-min WANG Zhang-yin LIU Jun ZHANG Zhan-Jun Department of Physics Shaoguan University Shaoguan 512005 China Key Laboratory of Optoelectronic Information Acquisition ＆ Manipulation of ministry of Education of China School of Physics ＆ Material Science Anhui University Hefei 230039 China

We propose a remote state preparation （RSP） scheme of three-particle Greenberger Horne-Zeilinger （GHZ） class states, where quantum channels are composed of two maximally entangled states. With the aid of forward classical bits, the preparation of the original state can be successfully realized with the probability 1/2, the necessary classical communication cost is 0.5 bit on average. If the state to be prepared belongs to some special states, the success probability of preparation can achieve 1 after consuming one extra bit on average. We then generalize this scheme to the case that the quantum channels consist of two non-maximally entangled states.

关键词： remote state preparation entangled states classical communication cost two-qubit projective measurement unitary operation

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Topological Design of Microstructures of Materials Containing Multiple Phases of Distinct Poisson’s Ratios

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Computer Modeling in Engineering & Sciences 2021年第1期126卷 293-310页

作者： Kai Long Xiaoyu Yang Nouman Saeed Zhuo Chen yi min Xie State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing102206China Centre for Innovative Structures and Materials School of EngineeringRMIT UniversityMelbourne3001Australia

A methodology for achieving the maximum bulk or shear modulus in an elastic composite composed of two isotropic phases with distinct Poisson’s ratios is proposed.A topology optimization algorithm is developed which is capable of finding microstructures with extreme properties very close to theoretical upper *** effective mechanical properties of the designed composite are determined by a numerical homogenization *** sensitivities with respect to design variables are derived by simultaneously interpolating Young’smodulus and Poisson’s ratio using different *** so-called solid isotropicmaterial with penalizationmethod is developed to establish the optimization *** bulk or shearmodulus is considered as the objective function,and the volume fraction of constituent phases is taken as *** ofmoving asymptotes is applied to update the design *** 3D numerical examples are presented to demonstrate the effectiveness of the proposed structural optimization *** effects of key parameters such as Poisson’s ratios and volume fractions of constituent phase on the final designs are investigated.A series of novel microstructures are obtained fromthe proposed *** is found that the optimized bulk and shearmoduli of all the studied composites are very close to the Hashin-Shtrikman-Walpole bounds.

关键词： Poisson’s ratio topology optimization homogenization bulk modulus shear modulus

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Synthesis and Crystal Structure of an Azide Bridged Binuclear Zinc(Ⅱ) Dimer Containing Taurine Schiff Base [Zn_2(C_8H_9N_2O_3S)_2·(N_3)_2·(H_2O)_2]_2·_2H_2O

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Chinese Journal of Structural Chemistry 2006年第7期25卷 767-770页

作者： JIANG yi-min LI Jia-ming XIE Fu-Qing WANG Yan-Fei Department of Chemistry and Chemical Engineering Guangxi Normal University Guilin 541004 China Department of Biochemistry Wuzhou Teachers College Hezhou 542800 China

The title complex [Zn2L2（N3）2（H2O）2]·2H2O （L = N-（2-pyridylmethylidene） taurine） has been synthesized in a methanol-water solution. The crystal belongs to monoclinic, space group P2 1/C with a = 15.8064（10）, b = 10.5015（5）, c = 17.3193（11） ,A, β= 111.314（2）°, V = 2678.2 （3） ,A ^3 C16H26N10O10S2Zn2, Mr = 713.33, Z = 4, DC = 1.769 g/cm^3, μ = 2.017 mm^-1 and F（000） = 1456. The asymmetric unit consists of two half-molecules of the complex and two water molecules. Four N and two O atoms form the coordination environment of each Zn atom, resulting in a distorted octahedral configuration. The two halves of each independent dimer are related by a crystallographic inversion centre, which lies at the centre of the ring formed by two Zn atoms and the coordinating atoms of the two azide anions. The average separation of Zn（Ⅱ）...Zn（Ⅱ） is 3.322 A. The molecules are linked by O-H...O hydrogen bonds, generating an interesting zigzag infinite chain structure in the ac plane.

关键词： binuclear zinc complex N-(2-pyridylmethylidene)-taurine schiff base,bridging azide crystal structure

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Congenital fiber-type disproportion presenting with type II respiratory failure after delivery:A case report

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World Journal of Clinical Cases 2021年第7期9卷 1748-1754页

作者： Hong-Mei Yang Jian-Xing Guo yi-min Yang Department of Intensive Care Unit The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina

BACKGROUND Congenital fiber-type disproportion(CFTD)is a form of congenital *** is rare,especially when presenting in patients with critical ***,we report a case of CFTD presenting with type II respiratory failure after delivery and provide a review of the literature on *** SUMMARY A 30-year-old woman was admitted to the obstetrics department of our hospital with premature rupture of the fetal membrane and with 7 h of regular *** delivery,the patient experienced a refractory type II respiratory *** examination along with diagnostic procedures such as electromyography and biopsy confirmed *** of invasive ventilator followed by intermittent use of noninvasive ventilator attenuated her *** patient recovered after ventilator-assisted respiration and was weaned off the noninvasive ventilator on the seventh day *** Congenital myopathy should be considered a differential diagnosis for type II respiratory failures that cannot be attributed to other diseases.

关键词： Congenital fiber-type disproportion Congenital myopathy Type II respiratory failure Delivery Systematic review Case report

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