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Role of endovascular embolisation for curative treatment of intracranial non- Galenic pial arteriovenous fistula

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Stroke & Vascular Neurology 2021年第2期6卷 260-266页

作者： Hengwei jin Xiangyu Meng Jiale Quan Yi Lu Youxiang Li Department of Interventional Neuroradiology Beijing Tiantan HospitalBeijingChina Interventional Neuroradiology department Beijing Neurosurgical InstituteBeijingChina Pediatric department Dongming People’s HospitalBeijingChina Department of Interventional Neuroradiology Beijing Neurosurgical InstituteBeijingChina

Background and purpose The safety and effectiveness of endovascular treatment for non-Galenic pial arteriovenous fistula(NGPAVF)is inadequately *** aim of this study is to explore the role of endovascular embolisation for curative treatment of *** and methods Patients with NGPAVF underwent endovascular treatment from January 2011 to November 2019 in our institution were retrospectively ***,clinical information,treatment details and clinical outcomes were *** associated with clinical outcomes were statistically *** Twenty patients were included,with a total of 22(2 patients have 2 fistulas)lesions.A total of 25 procedures were performed and 5 patients underwent 2 ***-up ranged from 3 to 84 months(mean=34.5 months).Thirteen(59.1%)lesions in 12(60.0%)patients acquired immediate occlusion after initial treatment(immediately occluded group)and follow-up confirmed the complete obliteration.A total of 17(77.3%)lesions in 15(75.0%)patients were cured at last *** maximal diameter of feeding arteries(p=0.04)and the maximal diameter of the varix(p=0.01)in immediately occluded group was smaller than non-immediately occluded *** number of feeding artery(p=0.004)and the maximal diameter of the varix(p<0.001)were much smaller in curative group than non-curative *** patients suffered procedure-related *** patients had an increased Modified Rankin Scale(mRS)and all patients had favourable clinical outcome(mRS≥2)at last *** Endovascular therapy plays an important role in curative treatment of *** with less feeding arteries and small varix may be easier to be cured by endovascular embolisation.

关键词： curative fistula treatment

New Sixth-Order Compact Schemes for Poisson/Helmholtz Equations

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Numerical Mathematics(Theory,Methods and Applications) 2023年第2期16卷 393-409页

作者： Kejia Pan Kang Fu jin Li Hongling Hu Zhilin Li School of Mathematics and Statistics HNP-LAMACentral South UniversityChangsha 410083China MOE-LCSM School of Mathematics and StatisticsHunan Normal UniversityChangsha 410081China CRSC&Department of Mathematics North Carolina State UniversityRaleighNC 27695-8205USA

Some new sixth-order compact finite difference schemes for Poisson/Helmholtz equations on rectangular domains in both two-and three-dimensions are developed and *** from a few sixth-order compact finite difference schemes in the literature,the finite difference and weight coefficients of the new methods have analytic simple *** of the new ideas is to use a weighted combination of the source term at staggered grid points which is important for grid points near the boundary and avoids partial derivatives of the source ***,the new compact schemes are exact for 2D and 3D Poisson equations if the solution is a polynomial less than or equal to *** coefficient matrices of the new schemes are M-matrices for Helmholtz equations with wave number K≤0,which guarantee the discrete maximum principle and lead to the convergence of the new sixth-order compact *** examples in both 2D and 3D are presented to verify the effectiveness of the proposed schemes.

关键词： Poisson equation Helmholtz equation sixth-order compact scheme maximum principle staggered grid.

Implementation strategies for high accuracy grinding of hydrodynamic seal ring with wavy face for reactor coolant pumps

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Science China(Technological Sciences) 2013年第10期56卷 2403-2412页

作者： FENG Guang GUO DongMing HUO FengWei jin ZhuJi KANG RenKe Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education Dalian University of Technology

Large size mechanical seals are one of the most important components used in reactor coolant ***,the hydrodynamic seal rings with wavy face are difficult to machine due to their high hardness and high form accuracy *** order to solve this difficult problem,a novel four-axis linkage grinding method using a cup wheel to process the hydrodynamic seal rings by line contact was proposed.A preliminary study indicates that the form error of the ground seal ring surface is extremely sensitive to different linkage relations of the four *** taking the center height of the cup wheel and the laws of motion along the X-axis,Z-axis,B-axis and C-axis as control variables,their effects on the principle form error of the ground surface are *** implementation strategies are proposed to reach lower principle form *** is found that the minimal principle form error is only 9.64 nm and hence its influence on the ground seal ring shape can be neglected in designing an ultra-precision grinding *** addition,the results indicate that the position accuracy of the X-axis at the microscale is acceptable no matter which implementation strategy is *** study is expected to serve as a theoretical basis for design and development of the four-axis ultra-precision grinding machine.

关键词： reactor coolant pump hydrodynamic seal ring wavy face grinding cup wheel high accuracy

AN IMPROVED NUMERICAL METHOD FOR CALCULATIONS IN WAVE KINEMATICS

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Journal of Hydrodynamics 2009年第6期21卷 826-834页

作者： SUN Yi-yan LIU Shu-xue LI jin-xuan State Kay Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024

The prediction of wave kinematics is a necessary basis for ocean engineering design. In this article, an improved method to calculate the wave kinematics especially in the crest region is presented. This method is based on the local approximation method. According to one measured wave surface, the proposed solution focuses on a Fourier series expansion in a somewhat larger segment of the wave surface record. The horizontal and vertical kinematics under the wave crest can be directly predicted. Good agreement between the numerical results and the theoretical Stokes waves verifies the validity of the numerical model. The effectiveness of the numerical method is also proved by the calculation of the wave kinematics of the laboratory focused wave groups.

关键词： Fourier series expansion wave kinematics focused wave

Wave control of a flexible space tether based on elastic metamaterials

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International Journal of Mechanical System Dynamics 2023年第1期3卷 58-72页

作者： Yexiong Huang Enmin Chen Jialiang Sun Dongping jin State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and AstronauticsNanjingChina

This study proposes a spider‐web elastic metamaterial to suppress vibrations in space slender structures,such as flexible space *** metamaterial consists of unit cells that are periodically distributed on the space tether to obtain band *** finite element model of the unit cell is established by employing the absolute nodal coordinate formulation(ANCF)due to the large deformation of the *** eigenfrequencies and corresponding vibration modes of the unit cell are obtained by ***,the band gap of the unit cell is calculated based on the phonon crystal *** relationship between the vibration modes and the band gaps is ***,an experiment is conducted to verify the vibration transmission characteristics of finite period *** results show the effectiveness of the spider‐web elastic metamaterial for vibration suppression of a flexible *** study provides insights into the use of elastic metamaterials for vibration isolation in space tether systems.

关键词： space tether wave control elastic metamaterial ANCF vibration suppression

Construction of comprehensive gene network for human mitochondria

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Chinese Science Bulletin 2010年第22期55卷 2366-2372页

作者： LI Jie GAO Song WANG jin ZHANG ChenYu State Key Laboratory of Pharmaceutical Biotechnology School of Life Science Nanjing University Nanjing 210093 China

By combining the knowledge from KEGG database and literatures, we construct a comprehensive gene network for human mitochondria. The network comprises 2442 genes of 9 functional categories, including metabolism, development, immune, and apoptosis, etc. Topological analysis reveals that the network is scale free. The hubs of high degrees are mostly the genes of apoptosis. Three big modules are found in the network, which represent development and cell growth, metabolism, immune and apoptosis respectively, suggesting the multiplicity of functions and the complexity of gene regulation in mitochondria.

关键词：网络建设基因网络线粒体人类细胞凋亡新陈代谢拓扑分析细胞生长

A Novel Hybrid Model for Gasoline Prices Forecasting Based on Lasso and CNN

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Journal of Social Computing 2022年第3期3卷 206-218页

作者： Hu Yang Xinlu Tian Xin jin Haijun Wang the School of Information Central University of Finance and EconomicsBeijing 100872China School of Economics Beijing Wuzi UniversityBeijing 101149China

Gasoline is the lifeblood of the national *** forecasting of gasoline prices is difficult because of frequent price fluctuations,its complex nature,diverse influencing factors,and low accuracy of prediction *** studies mainly focus on forecasting gasoline prices in a single region by single time series analysis which ignores the daily price co-movement of different series from multiple *** price co-movement may contain useful information for price forecasting,this paper proposes the LassoCNN ensemble model that combines statistical models and deep neural networks to forecast gasoline *** this model,the Least Absolute Shrinkage and Selection Operator(Lasso)screens and chooses the correlated time series to enhance the performance of forecasting and avoid overfitting,while Convolutional Neural Network(CNN)takes the selected multiple series as its input and then forecasts the gasoline prices in a certain *** results of gasoline prices at the national level and regional levels by using the new method demonstrate that the new approach provides more accurate results for the predictions of gasoline prices than those results generated by alternative ***,the relevant series can enhance the performance of forecasting and help to gain better results.

关键词： gasoline prices forecasting Lasso-CNN multiple time series

Novelα-galactosidase A gene mutation in a Chinese Fabry disease family:A case report

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World Journal of Clinical Cases 2022年第3期10卷 1067-1076页

作者： An-Yi Fu Qi-Zhi jin Ya-Xun Sun Department of Clinical Medicine Zhejiang UniversityHangzhou 310058Zhejiang ProvinceChina Department of Cardiology The Quzhou Affiliated Hospital of Wenzhou Medical UniversityQuzhou People’s HospitalQuzhou 325035Zhejiang ProvinceChina Department of Cardiology Sir Run Run Shaw HospitalClinical Medicine of Zhejiang UniversityHangzhou 310016Zhejiang ProvinceChina

BACKGROUND Fabry disease(FD)is a rare X-linked lysosomal storage disease caused by a deficiency of the enzymeα-galactosidase *** SUMMARY Herein,we analyzed a four-generation Chinese *** proband is a 57-yearold woman who was diagnosed with left ventricular hypertrophy and atrial fibrillation 7 years *** showed an end-diastolic diameter of the interventricular septum of 19.9 mm,left ventricular end-diastolic diameter of 63.1 mm,and moderate-to-severe mitral *** magnetic resonance indicated an enlarged left heart and right atrium,decreased left ventricular systolic and diastolic function,a left ventricular ejection fraction of 20%,and thickening of the left ventricular *** March 2019,gene and enzyme activity tests confirmed the diagnosis of *** son was diagnosed with FD after gene and enzyme activity assay,and was prescribed agalsidase-βfor enzyme replacement therapy in July *** sisters of the proband were also diagnosed with FD by genetic *** of them had a history of atrial *** A novel mutation was identified in a Chinese family with FD,in which the male patient had a low level of enzyme activity,early-onset,and severe organ *** analysis of clinical phenotype genetic testing and enzyme activity testing helped in the diagnosis and treatment of this FD family.

关键词： Lysosomal storage disease Enzyme activity Fabry disease Frameshift deletion Whole exon sequencing Case report

Resource Allocation Algorithm Based on PSO-GA for Multi-User OFDM System

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Journal of Electronic Science and Technology 2015年第1期13卷 68-72页

作者： Hao-Ye Zhang jin-Ping Mei Shi-Bing Zhang Nantong Branch China Mobile Group Jiangsu Company Limited School of Electronics and Information Nantong University

In order to minimize the transmitted power in the multi-user orthogonal frequency division multiplexing（OFDM） system, a scheme combining the improved particle swarm optimization（POS） algorithm with genetic algorithm（GA） is proposed to optimize the sub-carriers and bits allocation. In the algorithm, a random velocity between the maximum and minimum particle velocity is used as the updating velocity instead of maximum or minimum velocity when the updated particle velocity is higher than the maximum particle velocity or lower than the minimum particle velocity. Then, the convergence population is used as the initial population of the genetic algorithm to optimize the subcarriers and bits allocation further. Simulation results show that the transmitted power of the proposed algorithm is about 2 d B to 10 d B lower than that of the genetic algorithm, particle swarm optimization algorithm, and Zhang＇s algorithm.

关键词： Bit allocation orthogonal frequency division multiplexing particle swarm optimization algorithm with genetic algorithm sub-carri