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基于文体视角的《共产党宣言》标点符号诠释

齐齐哈尔大学学报（哲学社会科学版） 2024年第3期 32-36页

作者：刘明远同济大学外国语学院上海200082 井冈山大学外国语学院江西吉安343009

标点符号作为文体中表达意图的手段能展示作者的声音和态度。《共产党宣言》作为“共产主义的出生证”是流传最广、影响最深的马克思恩格斯著作之一,马克思在这篇充满哲思与科学论证的文本中,综合使用不同的标点,传递文本内容、情感、... 详细信息

标点符号作为文体中表达意图的手段能展示作者的声音和态度。《共产党宣言》作为“共产主义的出生证”是流传最广、影响最深的马克思恩格斯著作之一,马克思在这篇充满哲思与科学论证的文本中,综合使用不同的标点,传递文本内容、情感、语气、态度倾向,缜密的理性思维与丰富的感性思维融为一体。基于标点符号分类,语句归纳,统计分析和文本内容的细读、阐释,表明《共产党宣言》在情感传递、动机表达和对象指引中有包括批判讽刺、动员鼓舞和思考引导在内的三种指向。

关键词：标点符号文体《共产党宣言》

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基于随机森林回归的电离层幅度闪烁指数预测

计算机工程与设计 2024年第8期45卷 2350-2356页

作者：钟伦珑刘明远胡铁乔刘永玉中国民航大学智能信号与图像处理天津市重点实验室天津300300

为满足低成本、高精度的电离层闪烁监测需求,提出一种基于随机森林回归的闪烁指数预测模型。在卫星导航接收机输出信息基础上,计算电离层结构状态参数,形成输入参数,并进行参数筛选构建训练数据集,结合专用型电离层闪烁监测接收机观测... 详细信息

为满足低成本、高精度的电离层闪烁监测需求,提出一种基于随机森林回归的闪烁指数预测模型。在卫星导航接收机输出信息基础上,计算电离层结构状态参数,形成输入参数,并进行参数筛选构建训练数据集,结合专用型电离层闪烁监测接收机观测到的闪烁指数,训练生成基于随机森林回归的幅度闪烁指数预测模型。实验结果表明,与传统电离层幅度闪烁指数计算方法相比,随机森林回归模型预测得到的闪烁指数相关性更强、精度更高。

关键词：幅度闪烁指数随机森林回归电离层结构状态载噪比电离层闪烁监测全球导航卫星系统预测模型

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不同船体破口对水流出流特性影响研究

舰船科学技术 2024年第1期46卷 21-27页

作者：何振鹏刘明远李敏堂姚连峥中国民航大学航空工程学院天津300300 陆军军事交通学院军事交通运输研究所天津300161

利用冲击动力学仿真,构建多种类型的船体破口,将冲击仿真所得的船体破口形状耦合进构建的多相流计算模型中,按照069型和067型登陆艇面临的实际堵漏环境,分析不同形状船体破口、不同尺寸船体破口、不同翻边船体破口的水流出流特性。研究... 详细信息

利用冲击动力学仿真,构建多种类型的船体破口,将冲击仿真所得的船体破口形状耦合进构建的多相流计算模型中,按照069型和067型登陆艇面临的实际堵漏环境,分析不同形状船体破口、不同尺寸船体破口、不同翻边船体破口的水流出流特性。研究表明,翻边撕裂较深的破口形状出流距离要远;外翻边破口的水流出流距离呈现先小于后大于内翻边破口的规律;400 mm、300 mm和200 mm破口相比同时刻下的出流距离相差较小,但冲击压强的稳定值相差较大,400 mm破口为34700 Pa,比300 mm破口大1300 Pa,比200 mm破口大5700 Pa。研究可为船体破损后的堵漏密封作业提供精准的数据支撑,也可为新型堵漏器材的设计提供技术指导。

关键词：船体破口水流出流水动力学

Paper-like Microfibrous Nickel Catalyst for Hydrogen Production via NH_3 Decomposition in Fuel Cell Applications

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Chinese Chemical Letters 2006年第10期17卷 1397-1400页

作者： Yong LU Hong WANG Ye liu ming yuan HE Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of Chemistry East China Normal University Shanghai 200062

A sinter-locked three-dimensional network of microfibrous nickel catalyst has been fabricated based on wet layup papermaking and sintering processes and this novel approach permits the production of -11 W fuel cell po... 详细信息

关键词： Microfibrous catalyst nickel hydrogen production ammonia fuel cells.

糠酸氟替卡松/乌美溴铵/维兰特罗三联疗法与传统ICS/LAMA疗法对ACO患者的临床疗效差异分析

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广东医学 2024年第6期45卷 751-756页

作者：张勇党垚陈萍刘元明彭州市人民医院呼吸与危重症医学科四川彭州611930 彭州市人民医院耳鼻喉科四川彭州611930

目的探讨糠酸氟替卡松/乌美溴铵/维兰特罗(FF/UMEC/VI)三联疗法对哮喘-慢性阻塞性肺疾病重叠综合征(ACO)患者的临床疗效及与吸入型糖皮质激素(ICS)/长效抗胆碱能拮抗剂(LAMA)联合疗法的差异性。方法纳入2019年6月至2022年6月呼吸与危重... 详细信息

目的探讨糠酸氟替卡松/乌美溴铵/维兰特罗(FF/UMEC/VI)三联疗法对哮喘-慢性阻塞性肺疾病重叠综合征(ACO)患者的临床疗效及与吸入型糖皮质激素(ICS)/长效抗胆碱能拮抗剂(LAMA)联合疗法的差异性。方法纳入2019年6月至2022年6月呼吸与危重症医学科收治的90例ACO患者,随机分为研究组与对照组,各45例。对照组患者予以ICS/LAMA治疗,研究组患者予以FF/UMEC/VI三联疗法治疗,治疗12周后比较两组患者用药前后肺功能指标变化、症状改善情况及疗效评价。结果治疗前研究组与对照组患者基础临床资料及各项肺功能指标差异无统计学意义(P>0.05)。治疗12周后研究组患者各项肺功能指标及血气分析指标较治疗前均显著改善(P<0.05)。不同方案治疗12周后,研究组患者各项肺功能改善程度均高于对照组患者(P<0.05)。治疗12周后研究组患者症状改善指标及治疗有效率均高于对照组患者(P<0.05)。结论FF/UMEC/VI三联疗法对于ACO患者具有显著治疗效果,能够改善患者肺功能,缓解患者临床症状,具有较为广阔的应用前景。

关键词：哮喘-慢性阻塞性肺疾病重叠综合征糠酸氟替卡松乌美溴铵维兰特罗

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Numerical simulations for radon migration and exhalation behavior during measuring radon exhalation rate with closed-loop method

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Nuclear Science and Techniques 2024年第1期35卷 81-95页

作者： ming Xia Yong-Jun Ye Shu-yuan liu School of Resources Environment and Safety Engineering University of South ChinaHengyang 421001China Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy University of South ChinaHengyang 421001China

Accurate measurements of the radon exhalation rate help identify and evaluate radon risk regions in the *** these measurement methods,the closed-loop method is frequently ***,traditional experiments are insufficient or cannot analyze the radon migration and exhalation patterns at the gas–solid interface in the accumulation *** CFD-based technique was applied to predict the radon concentration distribution in a limited space,allowing radon accumulation and exhalation inside the chamber intuitively and *** this study,three radon exhalation rates were defined,and two structural ventilation tubes were designed for the *** consistency of the simulated results with the variation in the radon exhalation rate in a previous experiment or analytical solution was *** effects of the vent tube structure and flow rate on the radon uniformity in the chamber;permeability,insertion depth,and flow rate on the radon exhalation rate and the effective diffusion coefficient on back-diffusion were *** on the results,increasing the inser-tion depth from 1 to 5 cm decreased the effective decay constant by 19.55%,whereas the curve-fitted radon exhalation rate decreased(lower than the initial value)as the deviation from the initial value increased by approximately 7%.Increasing the effective diffusion coefficient from 2.77×10^(-7) to 7.77×10^(-6) m^(2) s^(-1) made the deviation expand from 2.14 to 15.96%.The conclusion is that an increased insertion depth helps reduce leakage in the chamber,subject to notable back-diffusion,and that the closed-loop method is reasonably used for porous media with a low effective diffusion coefficient in view of the back-diffusion *** CFD-based simulation is expected to provide guidance for the optimization of the radon exhalation rate measurement method and,thus,the accurate measurement of the radon exhalation rate.

关键词： Radon exhalation Numerical simulation Accumulation chamber

Improved Carrier Frequency Offset Estimation in OFDM Systems

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The Journal of China Universities of Posts and Telecommunications 2004年第Z1期11卷 33-36页

作者： liu Xiao-ming liu yuan-an Wireless Communication Center Beijing University of Posts and Telecommunications Beijing 100876 P.R.China Wireless Communication Center Beijing University of Posts and Telecommunications Beijing 100876 P.R.China

A new carrier frequency offset estimation algorithm in Orthogonal Frequency Division Multiplexing (OFDM) systems is proposed. The proposed algorithm is an improvement of the Michele Morelli (M&M) algorithm. It also uses a training symbol which is divided into L>2 identical parts to estimate the carrier frequency offset, and the estimation range is ±L/2 the subcarrier spacing, but the performance of the proposed Maximum Likelihood (ML) algorithm is more robust and complex efficient than the M&M algorithm.

关键词： frequency offset estimation multipath channel OFDM

Characteristics of a Negative Cloud-to-Ground Lightning Discharge Based on Locations of VHF Radiation Sources

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Atmospheric and Oceanic Science Letters 2014年第3期7卷 248-253页

作者： SUN Zhu-Ling QIE Xiu-Shu liu ming-yuan Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO) Institute of Atmospheric PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences

The lightning very high frequency （VHF） radiation location system based on the short-baseline time-difference of arrival （TDOA） technique provides an effective approach to describe the temporal and spatial development of lightning discharge in two dimensions with high resolution. A negative single-stroke cloud-to- ground （CG） lightning flash was analyzed in detail using the radiation location results and synchronic fast/slow elec- tric field changes. The long-duration preliminary break- down process appeared to propagate with hi-directional leader channels. The two negative simultaneous discharge channels sloped down with a considerable horizontal com- ponent in the lower positive charge region at speeds of about 105 m s-1. The stepped leader was clearly converted from one channel of the preliminary breakdown process and spread downwards with branches. The speeds of the stepped leaders were about 105 m s -1. The K processes after the return stroke could either directly initiate from the start region with negative polarity lightning discharge, or initiate from a new region in the cloud as negative recoil streamers. All K processes propagated along the preceding electrified channel, while not all K processes initiated from the tips of positive breakdowns. The speeds of the K processes were about 106-107 m s-1.

关键词： short-baselinevery high frequency radiation cloud-to-ground lightningdischarge

The relationship between the expression of tumor matrix-metalloproteinase and the characteristics of magnetic resonance imaging of human gliomas

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The Journal of Biomedical Research 2010年第2期24卷 124-131页

作者： Lihua liu ming Zhang yuan Wang Min Li Center of Image the First Affilliated Hospital to Medical College of Xi'an Jiaotong University Xi'an Shaanxi Province 710061 China

Objective： To investigate the relationship between the expression level of matrix-metalloproteinases （MMPs） with the pathological grades and MRI characteristics of human gliomas. Methods： Prior pre- and post-contrast enhancement MRI was performed on 31 patients with gliomas, which were confirmed by post-operational pathology. The expression of MMP-2 and MMP-9 were determined by immunohistochemical staining in both a low grading group （grades I and II, n = 20） and high grading group （grades III and IV, n = 11）. Results： Compared to the low grading group, the expression levels of MMP-2, MMP-9, as well as the tumor edema index （EI）, enhanced percentage （EP） and maximum diameters were significantly greater in the high grading group. MMP-2 and MMP-9 expression were correlated with the tumor EI, EP and the maximum diameters. There were no differences in MMP-2 and MMP-9 expression between the unclear border definition group and the clear border definition group, whereas the MMPs expression levels were greater in the heterogeneous signal group than in the homogeneous signal group. Conclusion： The expression level of MMPs is correlated with the invasion ability of human gliomas. The MRI parameters, such as tumor El, EP, maximum diameter, and signal heterogeneity technically reflect the expression level of MMPs, and can be used to estimate the tumor＇s malignant behavior, thus providing the guidance for clinical therapies.

关键词： matrix-metalloproteinase magnetic resonance imaging glioma