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Multiparameter magnetic resonance imaging-based radiomics model for the prediction of rectal cancer metachronous liver metastasis

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 62-72页

作者： Zhi-Da Long Xiao Yu Zhi-xiang xing Rui Wang Department of Hepatobiliary and Pancreaticosplenic Surgery Jingzhou Hospital Affiliated to Yangtze UniversityJingzhou 434100Hubei ProvinceChina

BACKGROUND The liver,as the main target organ for hematogenous metastasis of colorectal cancer,early and accurate prediction of liver metastasis is crucial for the diagnosis and treatment of ***,this study aims to investigate the application value of a combined machine learning(ML)based model based on the multiparameter magnetic resonance imaging for prediction of rectal metachronous liver metastasis(MLM).AIM To investigate the efficacy of radiomics based on multiparametric magnetic resonance imaging images of preoperative first diagnosed rectal cancer in predicting MLM from rectal *** We retrospectively analyzed 301 patients with rectal cancer confirmed by surgical pathology at Jingzhou Central Hospital from January 2017 to December *** participants were randomly assigned to the training or validation queue in a 7:3 *** first apply generalized linear regression model(GLRM)and random forest model(RFM)algorithm to construct an MLM prediction model in the training queue,and evaluate the discriminative power of the MLM prediction model using area under curve(AUC)and decision curve analysis(DCA).Then,the robustness and generalizability of the MLM prediction model were evaluated based on the internal validation set between the validation queue *** Among the 301 patients included in the study,16.28%were ultimately diagnosed with MLM through pathological *** analysis showed that carcinoembryonic antigen,and magnetic resonance imaging radiomics were independent predictors of ***,the GLRM prediction model was developed with a comprehensive nomogram to achieve satisfactory *** prediction performance of GLRM in the training and validation queue was 0.765[95%confidence interval(CI):0.710-0.820]and 0.767(95%CI:0.712-0.822),*** with GLRM,RFM achieved superior performance with AUC of 0.919(95%CI:0.868-0.970)and 0.901(95%CI:0.850-0.952)in the training and validation queue,respect

关键词： Rectal cancer Metachronous liver metastases Magnetic resonance imaging Radiomics Machine learning

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经尿道等离子电切术治疗老年前列腺增生的临床作用分析

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中国实用医药 2025年第3期20卷 48-51页

作者：邝祥醒广州市中西医结合医院泌尿外科 510800

目的分析老年前列腺增生应用经尿道等离子电切术治疗的临床效果。方法80例老年前列腺增生患者,按照随机数字法分为对照组与观察组,每组40例。对照组给予前列腺汽化电切术治疗,观察组给予经尿道等离子电切术治疗。比较两组临床疗效、并... 详细信息

目的分析老年前列腺增生应用经尿道等离子电切术治疗的临床效果。方法80例老年前列腺增生患者,按照随机数字法分为对照组与观察组,每组40例。对照组给予前列腺汽化电切术治疗,观察组给予经尿道等离子电切术治疗。比较两组临床疗效、并发症发生率、临床指标及国际前列腺症状评分表(IPSS)评分。结果观察组的总有效率(95.00%)与对照组(75.00%)相比较高,组间比较有统计学意义(P0.05);术后,两组的IPSS评分均较术前显著降低,且观察组的IPSS评分(7.15±1.08)分低于对照组的(15.92±2.57)分,组间比较有统计学意义(P<0.05)。观察组的术后并发症发生率为2.50%(1/40),低于对照组的17.50%(7/40),组间比较有统计学意义(χ^(2)=5.000,P=0.025<0.05)。结论老年前列腺增生患者实施经尿道等离子电切术治疗具有显著的临床价值。

关键词：老年前列腺增生经尿道等离子电切术前列腺汽化电切术临床价值

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Boundedness for a Class of Generalized Commutators on λ-Central Morrey Space

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Acta Mathematica Sinica,English Series 2013年第10期29卷 1917-1926页

作者： Xiao YU xiang xing TAO Department of Mathematics Zhejiang University Department of Mathematics Shangrao Normal University Department of Mathematics Zhejiang University of Science and Technology

Let 0 〈 a 〈 n, Ω be a rough kernel, and let A have derivatives of order m- 1 in CI3MOTM with m ≥ 2. We consider a class of generalized commutators TΩA,α of Cohen-Gosselin type, and obtain the boundedness of TΩA... 详细信息

关键词： Generalized commutator central Morrey 'space central-BMO space

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Boundedness of multilinear operators on generalized Morrey spaces

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Applied Mathematics(A Journal of Chinese Universities) 2014年第2期29卷 127-138页

作者： YU Xiao TAO xiang-xing Department of Mathematics Shangrao Normal University Department of Mathematics Zhejiang University of Science and Technology

In this paper, the authors prove the boundedness of the multilinear maximal func- tions, multilinear singular integrals and multilinear Riesz potential on the product generalized Rn Rn Morrey spaces Mp1,ωw1 （Rn）... 详细信息

关键词： multilinear singular integral multilinear Riesz potential generalized Morrey space multilinearmaximal function.

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Study on analytical noise propagation in convolutional neural network methods used in computed tomography imaging

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Nuclear Science and Techniques 2022年第6期33卷 114-127页

作者： Xiao-Yue Guo Li Zhang Yu-xiang xing Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle and Radiation Imaging Tsinghua UniversityBeijing 100084China

Neural network methods have recently emerged as a hot topic in computed tomography(CT) imaging owing to their powerful fitting ability;however, their potential applications still need to be carefully studied because their results are often difficult to interpret and are ambiguous in generalizability. Thus, quality assessments of the results obtained from a neural network are necessary to evaluate the neural network. Assessing the image quality of neural networks using traditional objective measurements is not appropriate because neural networks are nonstationary and nonlinear. In contrast, subjective assessments are trustworthy, although they are time-and energy-consuming for radiologists. Model observers that mimic subjective assessment require the mean and covariance of images, which are calculated from numerous image samples;however, this has not yet been applied to the evaluation of neural networks. In this study, we propose an analytical method for noise propagation from a single projection to efficiently evaluate convolutional neural networks(CNNs) in the CT imaging field. We propagate noise through nonlinear layers in a CNN using the Taylor expansion. Nesting of the linear and nonlinear layer noise propagation constitutes the covariance estimation of the CNN. A commonly used U-net structure is adopted for validation. The results reveal that the covariance estimation obtained from the proposed analytical method agrees well with that obtained from the image samples for different phantoms, noise levels, and activation functions, demonstrating that propagating noise from only a single projection is feasible for CNN methods in CT reconstruction. In addition, we use covariance estimation to provide three measurements for the qualitative and quantitative performance evaluation of U-net. The results indicate that the network cannot be applied to projections with high noise levels and possesses limitations in terms of efficiency for processing low-noise projections. U

关键词： Noise propagation Convolutional neural network Image quality assessment

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Boundedness for multilinear fractional integral operators on Herz type spaces

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Applied Mathematics(A Journal of Chinese Universities) 2008年第4期23卷 437-446页

作者： SHI Yan-long TAO xiang-xing Dept. of Math. Faculty of Science Ningbo Univ. Ningbo 315211 China

In this paper the boundedness for the multilinear fractional integral operator Iα^（m） on the product of Herz spaces and Herz-Morrey spaces are founded, which improves the Hardy- Littlewood-Sobolev inequality for classical fractional integral Iα. The method given in the note is useful for more general multilinear integral operators.

关键词： multilinear fractional integral Herz space homogeneous Herz-Morrey space product space

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On the Unique Continuation Properties for Elliptic Operators with Singular Potentials

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Acta Mathematica Sinica,English Series 2007年第2期23卷 297-308页

作者： xiang xing TAO Song Yan ZHANG Department of Mathematics Faculty of ScienceNingbo University

Let u be a solution to a second order elliptic equation with singular potentials belonging to Kato-Fefferman-Phong＇s class in Lipschitz domains. An elementary proof of the doubling property for u^2 over balls is presented, if the balls are contained in the domain or centered at some points near an open subset of the boundary on which the solution u vanishes continuously. Moreover, we prove the inner unique continuation theorems and the boundary unique continuation theorems for the elliptic equations, and we derive the Bp weight properties for the solution u near the boundary.

关键词： doubling property unique continuation Lipschitz domain Kato-Fefferman-Phong's potential

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Zinc phosphate dissolution by bacteria isolated from an oligotrophic karst cave in central China

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Frontiers of Earth Science 2013年第3期7卷 375-383页

作者： Hongmei WANG Qiang DONG Jianping ZHOU xing xiang State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Wuhan 430074 China

Biogeochemical processes are fundamental to sustain the ecosystem in subsurface caves, but to date they are still far from well understood. To investigate micro-bially mediated phosphorus and zinc cycles, we isolated three bacterial strains from the dripping water in Heshang cave, central China, identified as Exiguobacterium aurantiacum E11, Pseudomonas fluorescens P35, and Pseu- domonas poae P41, respectively. Microbial capabilities in the dissolution of phosphorus-containing minerals were tested with zinc phosphate （Zn3（PO4）2） in batch culture at 30~C. A spectrophotometer, atomic absorption spectrum, and scanning electronic microscopy were used to measure the microbial growth, soluble Zn（II） concentration, and to observe the morphology of Zn3（PO4）2 before and after microbial dissolution. P. fluorescens and P. poae, the well- known phosphorus solubilizing bacteria （PSB）, are observed to solubilize Zn3（PO4）2 with an efficiency of 16.7% and 17.6%, respectively. To our knowledge, E. aurantiacum is firstly reported in this study to dissolve phosphorous-containing minerals with a higher efficiency of 39.7%, expanding our understanding about the ubiquitous occurrence of PSB in natural environments. Aqueous Zn（II） concentration positively correlates with H＋ activity, confirming the presence of acidification mechanisms widely exploited by PSB. Few itching pits were observed on the surface of Zn3（PO4）2 after microbial dissolution, inferring that microbial dissolution is not always associated with the direct contact with minerals. Even though the soluble Zn（II） concentration reached up to 370 mg/L in the system inoculated with E. aurantiacum Ell, inhibition of microbial growth was not detected by spectrophotometer. Our laboratory data revealed the importance of microbially-mediated P and Zn cycles in the subsurface ecosystem.

关键词： karst cave phosphate solubilizing bacteria (PSB) zinc toxicity biogeochemical process subsurface biosphere

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Multilinear Calder′on Zygmund operators on variableexponent Morrey spaces over domains

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Applied Mathematics(A Journal of Chinese Universities) 2011年第2期26卷 187-197页

作者： TAO xiang-xing YU Xiao ZHANG Hui-hui Department of Mathematics Zhejiang University of Science and Technology Hangzhou 310023 China Department of Mathematics Shangrao Normal University Shangrao 334001 China Department of Mathematics Faculty of Science Ningbo University Ningbo 315211 China

The boundedness of multilinear singular integrals of Calder′on-Zygmund type onproduct of variable exponent Lebesgue spaces over both bounded and unbounded domains areobtained. Further more, the boundedness for this t... 详细信息

关键词： multilinear Calder′on Zygmund operator variable exponent Lebesgue space over domain variableexponent Morrey space over domain.

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Localization of s-Wave and Quantum Effective Potential of a Quasi-free Particle with Position-Dependent Mass

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Communications in Theoretical Physics 2006年第5X期46卷 819-825页

作者： JU Guo-xing xiang Yang REN Zhong-Zhou Department of Physics Nanjing University Nanjing 210093 China

The properties of the 8-wave for a quasl-free partide with position-dependent mass （PDM） have been discussed in details. Differed from the system with constant mass in which the localization of the s-wave for the free quantum particle around the origin only occurs in two dimensions, the quasi-free particle with PDM can experience attractive forces in D dimensions except D = 1 when its mass function satisfies some conditions. The effective mass of a particle varying with its position can induce effective interaction, which may be attractive in some cases. The analytical expressions of the eigenfunctions and the corresponding probability densities for the 8-waves of the two- and three-dimensional systems with a special PDM are given, and the existences of localization around the origin for these systems are shown.

关键词： position-dependent mass s-wave Schrodinger equation dimensionality of the space localization eigenfunction probability density

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