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

当前中国中小企业发展障碍分析与对策研究

内蒙古大学学报（哲学社会科学版） 2006年第5期38卷 95-98页

作者：邱旻四川大学经济学院四川成都610064

中小企业虽然在飞速成长之中,但每年注册和死亡的中小企业数量都很大,在中国,中小企业的生存和发展。在融资渠道、专业服务、信息渠道和商业环境等方面,都存在着障碍,必须正确地分析,以找到相关的解决措施。

关键词：中小企业发展障碍对策措施

采用Gd_2O_2S回热填料的带预冷4K斯特林型高频脉管制冷机性能研究（英文）

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2014年第7期15卷 508-516页

作者： Zhuo-pei LI Yan-long JIANG Zhi-hua GAN Li-min qiu Jie CHEN Man-machine Environment Engineering College of Aerospace EngineeringNanjing University of Aeronautics and Astronautics Institute of Refrigeration and Cryogenics Zhejiang University Nanjing Cooltech Cryogenic Technology Co. Ltd.

研究目的:研究新型磁性回热填料Gd2O2S对液氦温区高频脉管制冷机多级回热器损失特性的影响。创新要点:确定了不同回热填料以及运行参数(频率、平均压力)下液氦温区多级脉管制冷机的制冷温度和各级预冷量,进一步明确了4 K高频回热损失机... 详细信息

研究目的:研究新型磁性回热填料Gd2O2S对液氦温区高频脉管制冷机多级回热器损失特性的影响。创新要点:确定了不同回热填料以及运行参数(频率、平均压力)下液氦温区多级脉管制冷机的制冷温度和各级预冷量,进一步明确了4 K高频回热损失机理。研究方法:采用理论研究与实验验证相结合的方法,基于一台两级G-M型低频脉管制冷机预冷的单极斯特林型高频脉管制冷机,研究多级回热器在高频以及4 K温区下的损失特性。选取新型回热填料Gd2O2S替代部分回热填料HoCu2,比较回热器采用两种填料时在不同运行频率及平均压力下的冷端制冷温度(图10)、各级预冷量和预冷温度(图11–12)。重要结论:采用孔隙率较小的新型磁性回热填料Gd2O2S可显著改善第一级回热器内压力波与质量流的相位关系,从而减小该级回热损失。减小平均压力可以降低制冷机无负荷制冷温度并减小第二级预冷量,但制冷工质氦的体积比热容会急剧增大,从而使低温级回热器的换热对频率非常敏感。此外,频率对高温级回热器的回热特性影响不明显。该方法可以为三级斯特林型4 K多级脉管制冷机提供设计依据。

关键词：斯特林型脉管制冷机回热填料 4K 高频预冷低温惯性管

Primary malignant lymphoma of the glans penis： a rare ：ase report and review of the literature

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2013年第4期15卷 571-572页

作者： Li Chu Wei Mao Kim Curran Vikramsingh Xi Liu Hui-min qiu jun-Hua Zheng Yi Wang Gen-Pei Yu Qing Xu Department of Medical Oncology Shanghai Tenth People's Hospital Tongji University School of Medicine Shanghai 200072 China Department of Urology Shanghai Tenth People's Hospital Tongji University School of Medicine Shanghai 200072 China and Department of Pathology Shanghai Tenth People's Hospital Tongji University School of Medicine Shanghai 200072 China

Dear Editor, We present here a rare case of primary malignant lymphoma of the glans penis that was detected in a 72-year-old man. Additionally, we have reviewed the literature for reports of primary malignant lym phoma of the penis. This is most likely the forty-ninth case of primary malignant lymphoma of the penis reported in the medical literature. Lymphomas typically originate from the lymph nodes and lymph tissues; however, the tonsils, spleen and bone marrow are also vulner- able sites. Due to the presence of lymph nodes and lymph tissue throughout the human body, primary malignant lymphomas of glans penis occur rarely. The diagnosis of this rare lymphoma may be dif- ficult and delayed without specific symptoms, and treatment modali- ties are controversial because of the limited number of patients. A 72-year-old male patient was referred to our hospital due to a mass on the left side of the glans penis in May 2007. A physical exa- mination identified two masses, one on the left tip and one on the right tip of his penis. The left lump measured approximately 8 mm in diameter, was hard in nature, and was cystic, reddish in colour and covered the surface of the glans penis with ill-defined margins. There was no visible ulceration and no tenderness on palpation. The cystic mass on the right side measured 15 mm; the lesion was firm in nature, did not protrude from the surface and had no palpable tenderness. The liver and spleen were not palpable, and no other sites oflymphadeno- pathy were observed; B symptoms were absent. Anti-inflammatory treatment was administered at another hospital, but it was unsuccess- ful. On 17 May 2007, the two masses were resected with penile pre- servation. The pathological examination showed the presence of a malignant lymphoma originating from B cells （diffuse large B）, as shown in Figure 1. The patient was diagnosed with diffuse large B-cell lymphoma of the glans penis, stage IE, according to the Ann Arbor classification. No obvious

关键词： malignant lymphoma literature

Phase transitions in bismuth under rapid compression

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 Physics B 2019年第3期28卷 300-303页

作者： Dong-Liang Yang Jing Liu Chuan-Long Lin qiu-min Jing Yi Zhang Yu Gong Yan-Chun Li Xiao-Dong Li Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of Science Center for High Pressure Science and Technology Advanced Research National Key Laboratory for Shock Wave and Detonation Physics Institute of Fluid PhysicsChinese Academy of Engineering Physics

The structural phase transitions of bismuth under rapid compression has been investigated in a dynamic diamond anvil cell using time-resolved synchrotron x-ray diffraction. As the pressure increases, the transformations from phase I,to phase II, to phase III, and then to phase V have been observed under different compression rates at 300 K. Compared with static compression results, no new phase transition sequence appears under rapid compression at compression rate from 0.20 GPa/s to 183.8 GPa/s. However, during the process across the transition from phase III to phase V, the volume fraction of product phase as a function of pressure can be well fitted by a compression-rate-dependent sigmoidal *** resulting parameters indicate that the activation energy related to this phase transition, as well as the onset transition pressure, shows a compression-rate-dependent performance. A strong dependence of over-pressurization on compression rate occurs under rapid compression. A formula for over-pressure has been proposed, which can be used to quantify the over-pressurization.

关键词： bismuth high pressure rapid compression over-pressurization

在线全文

学校读者我要写书评

暂无评论

中小企业融资障碍的制度分析

中国科技论坛 2006年第2期 89-93页

作者：邱旻四川大学经济学院四川成都610064

融资难是一个世界性的中小企业难题,各国解决的方法各不相同,成效也差别很大。本文主要从我国中小企业运作的环境入手,着重从金融制度改革这个层面来探讨改善中小企业融资的途径。

关键词：中小企业融资障碍制度分析对策措施

在线全文

学校读者我要写书评

暂无评论

论诗性主体

湖南师范大学社会科学学报 2009年第6期38卷 88-92页

作者：仇敏湖南师范大学文学院湖南长沙410081

主体性是生命存在的结构性可能。它由本能主体、感性主体、信仰主体、理性主体、道德主体、审美主体等构成。诗性主体理应是人之存在最重要的结构,它既存在于和各种主体相关联的结构之中,又超越和凌驾于它们之上。诗性主体是生命存在最... 详细信息

主体性是生命存在的结构性可能。它由本能主体、感性主体、信仰主体、理性主体、道德主体、审美主体等构成。诗性主体理应是人之存在最重要的结构,它既存在于和各种主体相关联的结构之中,又超越和凌驾于它们之上。诗性主体是生命存在最重要的权力和元话语,是保证文化艺术创造和幸福感、美感的最基本要素。现代人类迫切需要建立和完善诗性主体,它是拯救人性异化的重要力量,是克服消费欲望和引导精神走向无限可能性的精神工具,也是保证现代人走向审美超越和艺术化生存最基本的条件。

关键词：主体性诗性主体想象力智慧审美

在线全文

学校读者我要写书评

暂无评论

关于团和独立集的一类极值问题

北京化工大学学报（自然科学版） 2005年第6期32卷 79-81页

作者：郭秋敏北京化工大学理学院北京100029

图G称为一个(m,k,l;n)图,如果图中的每个顶点既被包含在一个(m+1)个点的团中,又被包含在(n+1)个点的独立集中,并且图中含有至少l个不同的(m+k+1)-团。文中讨论了(m,k,l;n)图,通过其阶数p,给出了(m,k,l;n)图存在的充要条件,从而得到所能... 详细信息

图G称为一个(m,k,l;n)图,如果图中的每个顶点既被包含在一个(m+1)个点的团中,又被包含在(n+1)个点的独立集中,并且图中含有至少l个不同的(m+k+1)-团。文中讨论了(m,k,l;n)图,通过其阶数p,给出了(m,k,l;n)图存在的充要条件,从而得到所能取得的最小阶数。

关键词：图团独立集

Discrepancy between presumptive and definite causes of chronic cough

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2011年第24期124卷 4138-4143页

作者： YU Li qiu Zhi-hong WEI Wei-li LIU Bo XU Xiang-huai LU Han-jing qiu Zhong-min Department of Respiratory Medicine Tongji Hospital TongjiUniversity School of Medicine Shanghai 200065 China

Background The current diagnostic algorithms for chronic cough require the establishment of the primary presumptive causes followed by the confirmation of diagnosis with the specific therapies. The aim of the study was to investigate the discrepancy between presumptive and definite causes and its clinical implication. Methods A total of 109 patients with chronic cough underwent laboratory investigations to identify the cause of cough; including sinus computerized tomography （if needed）, histamine bronchial provocation, induced sputum cytology and 24-hour esophageal pH or multi-channel intraluminal impedance combined with pH monitoring. The presumptive causes were confirmed by treating them sequentially. The difference between presumptive and definite causes of chronic cough was compared. Results Single cause was more frequent in the definite diagnosis than in the presumptive diagnosis （78.9% vs. 54.1%, X2=15.01, m=-0.0001）. In contrast, multiple causes were significantly fewer in definite diagnosis than in the presumptive diagnosis （15.6% vs. 37.6%, X2=13.53, P=-0.0002）. There was a discrepancy between definite and presumptive causes in 30 patients （27.5%）. Compared with the presumptive causes, definite upper airway cough syndrome （24.8% vs. 11.9%, X^2=6.0, P=0.01） and gastroesophageal reflux disease （6.4% vs. 0, X2=7.23, P=0.007） was more frequent as a single cause of chronic cough while cough variant asthma plus gastroesophageal reflux disease （3.7% vs. 11.9%, X2=5.17, P=0.02） and upper airway cough syndrome plus nonasthmatic eosinophilic bronchitis （0 vs. 9.2%, X2=10.48, P=0.001） were fewer as multiple causes of chronic cough. Conclusions A discrepancy was common between presumptive and definite causes of chronic cough. To treat presumptive causes sequentially may be a suitable solution for avoidance of erroneous multiple causes and possible over-treatment.

关键词： chronic cough etiology algorithm

Controllable generation of large-scale highly regular gratings on Si films

在线全文

学校读者我要写书评

暂无评论

Light(Advanced Manufacturing) 2021年第3期2卷 88-96页

作者： Jiao Geng Xiaoguo Fang Lei Zhang Guangnan Yao Liye Xu Fengjiang Liu Weiwei Tang Liping Shi min qiu Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake University18 Shilongshan RoadHangzhou 310024Zhejiang ProvinceChina Institute of Advanced Technology Westlake Institute for Advanced Study18 Shilongshan RoadHangzhou 310024Zhejiang ProvinceChina

The application of femtosecond laser-induced periodic surface texturing has significant potential in medicine,optics,tribology,and biology,among other ***,when irradiated by a large intense laser spot,the periodic structures usually exhibit an uncontrollable regularity,forming bifurcated patterns,thus limiting their widespread *** originates from numerous independent branching *** usual solution to this problem is to utilize the quasi-direct laser writing technique,that is,by limiting the laser beam size(diameter of100 wavelengths).Surprisingly,some unconventional complex patterns,such as radial,annular,and spiral gratings,can also be easily produced by structured light fields with unprecedented *** diameters reach up to>500μ***,we can artificially control the initial seeding structure to further improve the regularity of the gratings,defined by dispersion in the ripple orientation angle in their 2D Fourier *** a result,the regularity in our experiments produced by a large laser spot is even higher than that scanned by a tiny *** and highly regular ripples are beneficial to the structural coloring effects because they arise from the light diffraction by subwavelength gratings.

关键词： regularity limiting utilize