检索结果-南通市图书馆

Exceptional dynamics at exceptional points

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第1期13卷 4-5页

作者： Wenjie wan State Key Laboratory of Advanced Optical Communication Systems and Networks University of Michigan-Shanghai Jiao Tong University Joint InstituteShanghai Jiao Tong UniversityShanghai200240China Department of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai200240China

Exceptional points(EPs),singularities of non-Hermitian systems,often exhibit exotic behaviors by engineering the balance between the system gain and ***,EPs have been demonstrated to enable unidirectional perfect abso... 详细信息

关键词： spectrum. exceptional points

A cyclic UH model for sand

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2015年第2期14卷 229-238页

作者： wan Zheng Research Institute of Base and Foundation China Academy of Building Research

A simple cyclic elastoplastic constitutive model for sand is proposed based on the UH model for overconsolidated clay. The proposed model has the following features. First, in order to describe the stress-induced anisotropy in sand, a rotational hardening rule is introduced for the evolution of the yield surface axis with development of plastic deviatoric strain in the principal stress space. Second, the relationship between the rotational axis and stress-induced anisotropy is modeled by introducing the slope of rotational axis into the yield function. The fl atness of the yield surface can be determined by the slope of rotational axis. Finally, a revised unifi ed hardening parameter is proposed to incorporate the stress-induced anisotropy. The model capability in describing the cyclic response of sand is verifi ed by comparing the simulations with available test results.

关键词： stress-induced anisotropy sand unifi ed hardening

Dietary composition of birds in isolated ecosystems:a case study of Black Wood Pigeon in Republic of Korea

在线全文

学校读者我要写书评

暂无评论

Ecosystem Health and Sustainability 2020年第1期6卷 117-126,116页

作者： Soon Kyoo Choi Yung Chul Park sung wan Park Jae Woong Kim Woo Yuel Kim Division of Forest Science Kangwon National UniversityChuncheonRepublic of Korea Department of Biology Kyungpook National UniversityDaeguRepublic of Korea Earth Ecological Environment Research Institute DaejeonRepublic of Korea Division of National Ecosystem Survey Research NIESeocheonRepublic of Korea

We studied the feeding ecology of the Black Wood Pigeon(Columba janthina),a species endemic to the East Asian Pacific Islands,and determined the species’dietary composition and food preferences on Ulleung Island,South Korea,through field *** March 2016 to February 2018,the diversity of food items consumed was low,with the 10 most common plant species(from a total of 33)accounting for over 80%.Food availability varied depending on plant abundance,but this influence was minimized because of factors such as delayed fruit *** were the most favored food items(60-68%)but were replaced by nuts and weed seeds during the spring and winter *** composition and food preferences were related to the abundance of food items based on their phenology,but a steady,high preference for Aphananthe aspera was observed throughout the study *** abundance of Prunus takesimensis in June was correlated with changes in the Black Wood Pigeon *** study is the first to assess the feeding ecology of Black Wood Pigeons using field observations and suggests that the availability of different food items affects population changes on the East Asian Pacific islands.

关键词： Dietary composition feeding preference field observations fruit phenology seasonal variation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

论中国式现代化辩证逻辑的五重向度

中国矿业大学学报（社会科学版） 2025年第1期27卷 13-26页

作者：万舒全辽宁中医药大学马克思主义学院

党的二十大报告系统阐述了中国式现代化理论,蕴含着深刻的辩证逻辑。中国式现代化的辩证逻辑主要表现为以人口数量与质量的辩证运动提升中国式现代化的主体根基、以先富与共富的辩证运动激发中国式现代化的创造潜能、以物质文明与精神... 详细信息

党的二十大报告系统阐述了中国式现代化理论,蕴含着深刻的辩证逻辑。中国式现代化的辩证逻辑主要表现为以人口数量与质量的辩证运动提升中国式现代化的主体根基、以先富与共富的辩证运动激发中国式现代化的创造潜能、以物质文明与精神文明的辩证运动推进中国式现代化全面发展、以人与自然的辩证运动深化中国式现代化的生态建设、以自身发展与世界发展的辩证运动实现中国式现代化的世界意义。中国式现代化的辩证逻辑是中国式现代化理论的思想精髓,是指导我国社会主义现代化建设的智慧来源,是全面推进中华民族伟大复兴的方法指导。深入研究和阐释中国式现代化的辩证逻辑对于我们深刻领悟党的二十大精神、准确理解中国式现代化理论和推进我国社会主义现代化进程都具有重要意义。

关键词：中国式现代化辩证逻辑党的二十大

Translocation of Heterogeneous Flexible Polymers Assisted by Binding Particles

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2020年第7期38卷 784-790,I0008页

作者： wan-Cheng Yu Department of Physics School of PhysicsBeihang UniversityBeijing 100191China

A polymer chain usually contains two or more types of monomeric species from the perspective of polymer chemistry,which poses achallenge to the understanding of structure-property *** is of course true in the field of polymer *** the present work,Iinvestigate the translocation dynamics of heterogeneous flexible polymers composed of two types of monomers labeled A and B through ananopore assisted by binding particles(BPs)by using the coarse-grained Langevin dynamics simulations in two-dimensional ***,multiblock copolymers with different block lengths and monomeric components are considered.I critically examine how thetranslocation dynamics responds to the variations in the block length and the monomeric ***,it is found that the periodicstructure of a multiblock copolymer causes an obvious fingerprint feature in the residence time of individual monomers in which the number ofpeaks is exactly equal to the number of *** findings provide a basic understanding about the sequence-dynamics relationship for theBPs-assisted translocation of heterogeneous flexible polymers.

关键词： Polymer translocation Multiblock copolymer Binding particles Langevin dynamics simulations

基于感性工学和模糊层次分析法的汽车皮革座椅肌理设计研究

在线全文

学校读者我要写书评

暂无评论

皮革科学与工程 2025年第1期35卷 98-106页

作者：万青蓝武月琴西华大学美术与设计学院四川成都610039

为深入了解消费者对汽车皮革座椅的感性需求,选取25~44岁消费者进行实验研究。首先通过调研、焦点小组等方法选取4对感性词汇:商务/运动、高端/经济、传统/现代、复杂/简约;借助形态分析法解构汽车皮革座椅肌理要素,获得色彩、光泽、纹... 详细信息

为深入了解消费者对汽车皮革座椅的感性需求,选取25~44岁消费者进行实验研究。首先通过调研、焦点小组等方法选取4对感性词汇:商务/运动、高端/经济、传统/现代、复杂/简约;借助形态分析法解构汽车皮革座椅肌理要素,获得色彩、光泽、纹理、图案、质感五类肌理形式;其次运用模糊层次分析法构建层次指标体系与模糊函数评价矩阵,量化消费者感性需求;进一步分析用户感性意向与肌理设计各元素之间的相关性,提出符合用户感性需求的汽车皮革座椅肌理设计元素组合。并将代表特殊感性意向的肌理元素运用到汽车皮革座椅设计中,以期为汽车座椅颜色、材料、表面处理提供参考。

关键词：皮革肌理汽车座椅产品设计感性工学模糊层次分析法

Comparison of the efficacy and safety of once-daily dosing and on-demand use of udenafil for type 2 diabetic patients with erectile dysfunction

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2015年第1期17卷 143-148,I0011,I0012页

作者： Soon Hyun Park sung Woo Park Bong Yun Cha Ie Byung Park Kyung wan Min Yeon Ah sung Tae Hwa Kim Jae Min Lee Kang Seo Park Department of Internal Medicine Eulji University School of Medicine Daejeon 302-799 South Korea Department of Endocrinology and Metabolism Kangbuk Samsung Hospital Sungkyunkwan University School of Medicine Seou1110-746 South Korea Department of Endocrinology and Metabolism College of Medicine the Catholic University of Korea Seou1137-701 South Korea Department of Internal Medicine Gachon University of Medicine and Science Graduate School of Medicine Incheon 405-760 South Korea Department of Internal Medicine Eulji University School of Medicine Seou1139-872 South Korea Department of Endocrinology Ewha Woman's University School of Medicine Seoul 158-710 South Korea Department of Internal Medicine College of Medicine Hanyang University Seoul 133-792 South Korea.

We compared the efficacy and safety between once-daily dosing and on-demand use of udenafil for type 2 diabetic patients with erectile dysfunction （ED）. A multi-center, randomized, open-label, parallel-group, 12-week study was conducted. 161 patients who improved with on-demand 200 mg of udenafil according to Sexual Encounter Profile （SEP） diary Question 2 and 3 （Q2 and Q3） were randomized into 200 mg on-demand （n = 80） or 50 mg once-daily （n = 81） dosing groups for 8 weeks. The dosing period was followed by a 4-week treatment-free period. The primary efficacy endpoint was the change of the International Index of Erectile Function （IIEF） erectile function domain （EFD） score. The secondary efficacy endpoints included changes to the SEP diary Q2, Q3, IIEF Q3, Q4, other domains of IIEF, Global Assessment Question, and shift to the normal rate （EFD 〉 26）. Vascular endothelial markers were also assessed. The IIEF-EFD score of both groups improved after 8 weeks of treatment （P 〈 0.0001）. There was no statistically significant difference between two groups. Improvement was not maintained after the treatment-free follow-up period. Similar results were observed in the secondary efficacy endpoints. There was also no significant difference in vascular endothelial markers. Daily udenafil was well-tolerated, and there was no significant difference in the adverse drug reactions and adverse events between the two groups. Flushing and headache were the most frequent adverse events. Both regimens improved ED in diabetic patients and were well-tolerated. Further studies are needed to assess the effect of daily udenafil treatment in diabetic patients.

关键词： erectile dysfunction International Index of Erectile Function once-daily dosing ptiosphodiesterase type 5 inhibitor type 2 diabetes mellitus udenafil

Heegner Point Kolyvagin System and Iwasawa Main Conjecture

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2021年第1期37卷 104-120页

作者： Xin wan Academy of Mathematics and Systems Science Chinese Academy of Science and University of Chinese Academy of ScienceBeijing 100190P.R.China

We prove an anticyclotomic Iwasawa main conjecture proposed by Perrin-Riou for Heegner points for semi-stable elliptic curves E over a quadratic imaginary field K satisfying a certain generalized Heegner hypothesis,at an ordinary prime *** states that the square of the index of the anticyclotomic family of Heegner points in E equals the characteristic ideal of the torsion part of its Bloch–Kato Selmer group(see Theorem 1.3 for precise statement).As a byproduct we also prove the equality in the Greenberg–Iwasawa main conjecture for certain Rankin–Selberg product(Theorem 1.7)under some local conditions,and an improvement of Skinner’s result on a converse of Gross–Zagier and Kolyvagin theorem(Corollary 1.11).

关键词： Iwasawa theory Heegner Kolyvagin

Fabrication of Dual-pore Scaffolds Using a Combination of Wire-Networked Molding （WNM） and Non-solvent Induced Phase Separation （NIPS） Techniques

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2015年第4期12卷 565-574页

作者： Dong Guk Sohn Myoung Wha Hong Young yul Kim Young-Sam Cho Division of Mechanical and Automotive Engineering College of Engineering Wonkwang University 460 Iksandae-ro Iksan Jeonbuk 570-749 Republic of Korea Department of Orthopedics Daejeon St. Mary's Hospital Catholic University of Korea 64 Daeheung-ro Jung-gu Daejeon 301-723 Republic of Korea

In this study, to fabricate dual-pore scaffolds with interconnected pores, Non-solvent Induced Phase Separation （NIPS） and Wire-Network Molding （WNM） techniques were combined. First, a mold with uniform slits was prepared, and needles were inserted into the mold. Subsequently, polycaprolactone （PCL） pellets were dissolved in tetrahydrofuran （THF） at a specified ratio. The slurry was mixed using hot plate stirrer at 1200 rpm for 24 hours at 40 ~C. The PCL slurry was subsequently injected into the mold. Thereafter, to exchange the THF （solvent） with the ethanol （non-solvent）, the mold was soaked in an ethanol bath. After removing the mold from the ethanol bath, the needles were removed from the mold. Consequently, dual-pore scaffold with interconnected pores was obtained. The surface morphology of the fabricated scaffolds were observed using Scanning Electron Microscope （SEM）. Moreover, cell culture experiments were performed using the CCK-8 assay, and the characteristics of cells grown on the dual-pore scaffolds were assessed and were compared with the NIPS-based 3D plotting scaffold.

关键词： tissue engineering scaffold polycaprolactone (PCL) Wire-Network Molding (WNM) Non-solvent Induced Phase Separation (NIPS)