检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

矩阵的秩的多视角探析

高等数学研究 2024年第5期27卷 50-53页

作者：冯媛刘新红北京石油化工学院致远学院北京102617

矩阵的秩是线性代数中应用十分广泛的重要概念,同时它的抽象性也使其成为线性代数中的难点之一.从行列式、行阶梯形矩阵、线性方程组、向量组等不同视角对矩阵的秩进行探究和分析并通过调整气象观测站问题这一实际案例进行说明,不仅对... 详细信息

矩阵的秩是线性代数中应用十分广泛的重要概念,同时它的抽象性也使其成为线性代数中的难点之一.从行列式、行阶梯形矩阵、线性方程组、向量组等不同视角对矩阵的秩进行探究和分析并通过调整气象观测站问题这一实际案例进行说明,不仅对教师关于此概念的教学具有积极的指导意义,而且还可降低学生理解这一抽象概念的难度,促进学生发散思维的培养和创新能力的提升.

关键词：矩阵的秩多视角创新能力

Better Visual Image Super-Resolution with Laplacian Pyramid of Generative Adversarial Networks

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2020年第9期64卷 1601-1614页

作者： Ming Zhao xinhong liu Xin Yao Kun He School of Computer Science and Engineering Central South UniversityChangsha410000China Apple Inc. California95014USA

Although there has been a great breakthrough in the accuracy and speed of super-resolution(SR)reconstruction of a single image by using a convolutional neural network,an important problem remains unresolved:how to restore finer texture details during image super-resolution reconstruction?This paper proposes an Enhanced Laplacian Pyramid Generative Adversarial Network(ELSRGAN),based on the Laplacian pyramid to capture the high-frequency details of the *** combining Laplacian pyramids and generative adversarial networks,progressive reconstruction of super-resolution images can be made,making model applications more *** order to solve the problem of gradient disappearance,we introduce the Residual-in-Residual Dense Block(RRDB)as the basic network *** capacity benefits more from dense connections,is able to capture more visual features with better reconstruction effects,and removes BN layers to increase calculation speed and reduce calculation *** addition,a loss of content driven by perceived similarity is used instead of content loss driven by spatial similarity,thereby enhancing the visual effect of the super-resolution image,making it more consistent with human visual *** qualitative and quantitative evaluation of the baseline datasets shows that the proposed algorithm has higher mean-sort-score(MSS)than any state-of-the-art method and has better visual perception.

关键词： Single image super-resolution generative adversarial networks Laplacian pyramid

Development of an Intelligent Vehicle Experiment System

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2010年第6期23卷 684-689页

作者： YANG xinhong GAO Feng liu Guoliang WANG Guofu XU Guoyan School of Transportation Science ＆ Engineering Beihang University Beijing 100191 China

Existing vehicle experiment systems tend to focus on the research of vehicle dynamics by conducting performance tests on every system or some parts of the vehicle so as to improve the entire performance of the vehicle. Virtual technology is widely utilized in various vehicle test-beds. These test-beds are mainly used to simulate the driving training, conduct the research on drivers＇ behaviors, or give virtual demonstrations of the transportation environment. However, the study on the active safety of the running vehicle in the virtual environment is still insufficient. A virtual scene including roads and vehicles is developed by using the software Creator and Vega, and radars and cameras are also simulated in the scene. Based on dSPACE＇s rapid prototyping simulation and its single board DS1103, a simulation model including vehicle control signals is set up in MATLAB/Simulink, the model is then built into C code, and the system defined file（SDF） is downloaded to the DS1103 board through the experiment debug software ControlDesk and is kept running. Programming is made by mixing Visual C＋＋ 6.0, MATLAB API and Vega API. Control signals are read out by invoking library function MLIB/MTRACE of dSPACE. All the input, output, and system state values are acquired by arithmetic and are dynamically associated with the running status of the virtual vehicle. An intelligent vehicle experiment system is thus developed by virtue of program and integration. The system has not only the demonstration function, such as general driving, cruise control, active avoiding collision, but also the function of virtual experiment. Parameters of the system can be set according to needs, and the virtual test results can be analyzed and studied and used for the comparison with the existing models. The system reflects the running of the intelligent vehicle in the virtual traffic environment, at the same time, the system is a new attempt performed on the intelligent vehicle travel research and prov

关键词： intelligent vehicle signals integration mix programming virtual experiments

Applying a new method for direct collection, volume quantification and determination of N_2 emission from water

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2015年第1期27卷 217-224页

作者： xinhong liu Yan Gao Honglian Wang Junyao Guo Shaohua Yan Institute of Agricultural Resources and Environment Jiangsu Academy of Agricultural Sciences College of Resources and Environmental Science Nanjing Agricultural University

The emission of N2 is important to remove excess N from lakes, ponds, and wetlands. To investigate the gas emission from water, Gao et al.（2013） developed a new method using a bubble trap device to collect gas samples from waters. However, the determination accuracy of sampling volume and gas component concentration was still debatable. In this study, the method was optimized for in situ sampling, accurate volume measurement and direct injection to a gas chromatograph for the analysis of N2 and other gases. By the optimized new method, the recovery rate for N2 was 100.28% on average; the mean coefficient of determination（R2） was 0.9997; the limit of detection was 0.02%. We further assessed the effects of the new method, bottle full of water, vs. vacuum bag and vacuum vial methods, on variations of N2 concentration as influenced by sample storage times of 1,2, 3, 5, and 7 days at constant temperature of 15°C, using indices of averaged relative peak area（%） in comparison with the averaged relative peak area of each method at 0 *** indices of the bottle full of water method were the lowest（99.5%–108.5%） compared to the indices of vacuum bag and vacuum vial methods（119%–217%）. Meanwhile, the gas chromatograph determination of other gas components（O2, CH4, and N2O） was also accurate. The new method was an alternative way to investigate N2 released from various kinds of aquatic ecosystems.

关键词： New method N2 Ebullition collection Direct injection Gas chromatograph

在线全文

学校读者我要写书评

暂无评论

古今辨证论治老年性聋探究

中医眼耳鼻喉杂志 2024年第2期14卷 101-103页

作者：张颖周彬刘星宏谢慧成都中医药大学附属医院四川成都610072 成都中医药大学四川成都610075

本文重点总结对老年性聋的古代辨证论治记载,以及现代中医治疗老年性聋的经验,次要说明其病名溯源,病因病机等。肾开窍于耳,因此古代医家多从肾脏辨证论治老年性聋,亦有医家补充其病因可为气滞血瘀、脾失运化。治疗老年性聋最主要的原... 详细信息

本文重点总结对老年性聋的古代辨证论治记载,以及现代中医治疗老年性聋的经验,次要说明其病名溯源,病因病机等。肾开窍于耳,因此古代医家多从肾脏辨证论治老年性聋,亦有医家补充其病因可为气滞血瘀、脾失运化。治疗老年性聋最主要的原则为补肾健脾,行气活血,治疗方法以辨证内服汤药为主,可兼用针灸、保健按摩等外治法辅助治疗。

关键词：老年性聋病因病机辨证论治中医疗法

Phenotypic variation in Phoebe bournei populations preserved in the primary distribution area

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2018年第1期29卷 35-44页

作者： Yingang Li xinhong liu Junwei Ma Xiaomian Zhang Li-an Xu The Key Laboratory of Forest Genetics and Biotechnology of Ministry of Education Nanjing Forestry UniversityNanjing 210037 China Zhejiang Academy of Forestry Hangzhou 310023 China

Phoebe bournei（Hemsl.） Yang is a rare and protected plant in China. This study was conducted to determine the phenotypic variation in this species and to document phenotypic variation within and among populations of P. bournei. Nested analysis of variance, coefficient of variation, multiple comparisons, principal component analysis（PCA） and correlation analysis were used to analyze ten phenotypic traits in ten natural populations of *** from both the northeastern and the primary region of the range of this species. Significant differences among and within populations were observed in leaf and seed phenotypic traits. Variation among populations（34.92%）was greater than that within populations（26.19%）. The mean phenotypic differentiation coefficient was 53.77% among populations, indicating that variation among populations comprised the majority of the phenotypic variation of P. bournei. The coefficient of variance（CV） of ten traits varied from 6.44 to 18.45%, with an average of 12.03%.The CV of leaf traits among populations（15.64%） was higher than that of seed traits（8.60%）, indicating that seed traits were more stable. The results from CV and PCA indicated that leaf area, leaf length and thousand seed weight were the main factors accounting for the observed phenotypic variations. Significant or highly significant correlations were observed among most leaf and/or in seed phenotypic traits, whereas no significant correlations were observed between phenotypic traits and geographic *** on cluster analysis, the ten populations can be divided into three clusters. These clusters were not a result of geographic distances.

关键词： Phenotypic variation Phoebe bournei Population Principal component analysis Protection and utilization

在线全文

学校读者我要写书评

暂无评论

油茶遗传育种研究进展

浙江林业科技 2024年第1期44卷 96-100页

作者：潘晓凤程诗明韩素芳柳新红浙江农林大学浙江杭州311300 浙江省林业科学研究院浙江杭州310023 浙江省林业科技推广总站浙江杭州310020

油茶Camellia spp.是我国重要的木本油料作物,其种质创新和品种改良能够从根本上提升油茶的产量和质量,推动油茶产业快速发展。从油茶种质资源收集与保存、鉴定与评价以及杂交育种、分子育种等方面综述了我国目前油茶育种的研究现状,并... 详细信息

油茶Camellia spp.是我国重要的木本油料作物,其种质创新和品种改良能够从根本上提升油茶的产量和质量,推动油茶产业快速发展。从油茶种质资源收集与保存、鉴定与评价以及杂交育种、分子育种等方面综述了我国目前油茶育种的研究现状,并对我国油茶育种的发展方向和油茶产业发展趋势进行了分析,以期为油茶育种的进一步研究提供参考。

关键词：油茶种质资源杂交育种分子育种

Evolution of Phase Composition and Microstructure of Al_2O_3-Si-Al Composite at High Temperatures in Reducing Atmosphere

在线全文

学校读者我要写书评

暂无评论

China's Refractories 2014年第4期23卷 32-35页

作者： liu xinhong YE Fangbao ZHONG Xiangchong High Temperature Ceramics Institute Zhengzhou University

Al2 O3-Si-Al composite specimens with the size of 25 mm × 25 mm × 125 mm were prepared using fused alumina （as aggregates and fines）,ultra-fine α-Al2O3,Si and Al powders as starting materials,liquid phenol formaldehyde resin as the binder,pressing and heating at 800-1 500 ℃ for 3 h under carbon embedded *** of phase composition and microstructure of Al2 O3-Si-Al composite during heating from 800 to 1 500 ℃ under carbon embedded condition were *** results show that：（1） Al4 C3,AlN and SiC are initially formed at 800-900 ℃ due to reactions of Al and Si with C or CO and N2 ; （2） at 1 000-1 300 ℃,the amounts of Al4C3,AlN and SiC increase with temperature rising and their crystals grow; （3） at 1 400-1 500 ℃,Al4 C3 and AlN disappear,and minor SiAlON crystals are observed; the nonoxide crystals develop well and they are interlaced in the corundum skeleton structure,which creates strengthening and toughening

关键词： alumina-silicon-aluminum composite phase composition microstructure reducing atmosphere

A novel ω-conotoxin Bu8 inhibiting N-type voltage-gated calcium channels displays potent analgesic activity

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2021年第9期11卷 2685-2693页

作者： Jinqin Chen xinhong liu Shuo Yu Jia liu Rongfang Chen Yunxiao Zhang Ling Jiang Qiuyun Dai Beijing Institute of Biotechnology Beijing 100071China Key Laboratory of Magnetic Resonance in Biological System State Key Laboratory of Magnetic Resonance and Atomic and Molecular PhysicsWuhan Center for Magnetic ResonanceInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China College of Life Science Hunan Normal UniversityChangsha 410081China University of Chinese Academy of Sciences Beijing 100049China

ω-Conotoxins inhibit N-type voltage-gated calcium(Ca_(v)2.2)channels and exhibit efficacy in attenuating neuropathic pain but have a low therapeutic ***,we synthesized and characterized a novelω-conotoxin,Bu8 from Conus bullatus,which consists of 25 amino acid residues and three disulfide ***8 selectively and potently inhibits depolarization-activated Ba^(2+ )currents mediated by rat Ca_(v)2.2 expressed in HEK293 T cells(IC_(50)=89 nmol/L).Bu8 is two-fold more potent thanω-conotoxin MVIIA,aω-conotoxin currently used for the treatment of severe chronic *** also displays potent analgesic activity in animal pain models of hot plate and acetic acid writhing but has fewer side effects on mouse motor function and lower toxicity in *** lower side effects may be attributed to its faster binding rate and higher recovery *** NMR structure demonstrates that Bu8 contains a small irregular tripleβ-*** structure-activity relationships of Bu8 Ala mutants and Bu8/MVIIA hybrid mutants demonstrate that the binding mode of Ca_(v)2.2 with the amino acid residues in loop 1 and loop 2 of Bu8 is different from that of *** study characterizes a novel,more potentω-conotoxin and provides new insights for designing Ca_(v)2.2 antagonists.

关键词： N-type calcium ion channel ω-conotoxin Bu8 Analgesic activity Structure-activity relationship