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Search Results: 1 - 10 of 220248 matches for " 刘虎 "
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新疆艺术中心丙烯画表面污染物清洗方法初探
Exploring Propylene-Painting Surface Pollutant Cleaning Method of the Xinjiang Art Center
 [PDF]

, 梁涛
Advances in Material Chemistry (AMC) , 2014, DOI: 10.12677/AMC.2014.21001
Abstract:
新疆艺术中心两幅珍贵丙烯画——《天山健儿》、《歌舞之乡》的表面已经受到涂料、沥青、粘结剂等污染,本文利用材料学为修复基础知识,依据文物古迹保护准则为保护指导方向,通过红外光谱确定污染物的种类,进一步探讨污染物以及丙烯颜料的化学性质和物理性质,为了能够更好地清洗该宝贵丙烯画表面的污染物提供科学数据和技术支持,使今后丙烯画的加固、修复、馆藏等后续保护工作得到不断完善。
There are two precious propylene-paintings named “The Snow Mountain Athletes” and “The Town of Song and Dance” in the Xinjiang art center, whose surface has been polluted by the coating, the asphalt and the binder. In this paper, using the basic knowledge of material science and the basis of cultural relics protection standards for the protection guidance, the type of pollutants was determined by the infrared spectrum, and the pollutants’ chemical and physical properties of the acrylic paint are further discussed, which will be able to promote better cleaning the pollutants on the surface of the precious propylene-painting and to provide scientific data and technical support for the protection of the propylene-painting. The reinforcement, repair and collection management of the propylene-painting will be improved.
一类潜在的文物表面防护材料:光致变色材料
A Potential Surface Protective Material of Cultural Relics: Photochromic Material
 [PDF]

, 梁涛
Advances in Material Chemistry (AMC) , 2014, DOI: 10.12677/AMC.2014.23006
Abstract:

光致变色材料是一类具有特殊性能的功能材料,其在信息存储、细胞成像、分子开关、显示器材料、全息防伪及信息无损读出等方向有着潜在的应用价值。由于光致变色材料吸收强紫外线,因此在文物的表面修复过程中加入一些光致变色材料将提高文物表面的抗老化性和可再处理性,该材料有可能起到修复和保护的功能,进而带来经济效益。本文指出目前文物保护材料的不足之处,介绍一些光致变色材料的优点和合成方法,探讨这些新材料在文物保护方面应用的可能性。
The photochromic material is a functional material, which has a potential application value for the information store, cell imaging, molecular switch, display, holographic anti-counterfeiting materials and information non-destructive readout. Repairing surface of the cultural relics dopes some photochromic material into the protection material to absorb strong ultraviolet ray and to improve the aging resistance on the surface of the cultural relics. The photochromic material may have the function of restoration and protection, and bring economic benefits. This paper presents the deficiency of the current cultural relics protection material, introduces some advantages and synthesis methods of photochromic materials, and discusses the possibility of the new material application in the cultural relics protection field.

廖仲恺与新民主主义革命理论
Liao Zhongkai and New Democratic Revolution Theory
 [PDF]

,
Advances in Social Sciences (ASS) , 2016, DOI: 10.12677/ASS.2016.51023
Abstract:
廖仲恺是我国杰出的资产阶级革命民主主义者,在共产国际代表和中国共产党的帮助下,不断进行着艰苦卓绝的反帝反封建斗争。在斗争过程中,廖仲恺对中国的反革命势力、革命力量、革命成功后的社会建设的认识不断发展与深化,为后来中国共产党的新民主主义革命理论奠定了基础。但同时,廖仲恺对革命对象的范围、对工农群众的地位、对社会主义社会等方面的了解还不够全面,存在着一些理论局限,而这局限大多是由其阶级立场决定的。
Liao Zhongkai is a outstanding bourgeois revolutionary democrat in our country, struggling against imperialism and feudalism continuously, with the help of Comintern representation and Chinese Communist Party. Liao Zhongkai’s understanding of China’s counter-revolutionary forces, the revolutionary forces and social construction after the successful revolution had been developed and deepened during the process, establishing the foundation of New Democratic Revolution Theory of Chinese Communist Party. However, the understanding of the scope of the revolutionary subject, the status of workers and peasants, and aspects of the socialist society is still not comprehensive enough, some theoretical limits remaining, which are decided by class position mostly.
磁共振扫描中受检者电磁辐射现状与防护对策

环境与职业医学 , 2012,
Abstract: [目的]研究不同部位累积射频能量吸收剂量(CSAD),分析受检者在磁共振扫描中的电磁辐射现状,探讨相应的防护措施。[方法]采用美国GE公司的signaEXITEHD1.5TTwinSpeed扫描仪,头颅8通道高分辨线圈,腹部8通道相控阵线圈,根据机器自动计算出的峰值射频能量吸收率和每个序列的扫描时间分别计算得到各序列的射频能量吸收剂量(SAD),从而得到头颅和腹部常规序列(包括平扫和增强)扫描时的CSAD。[结果]头颅前10min内平扫扫描CSAD修正后为2.5489W/kg。第二个10min内,轴位三维扰相位快速梯度回波增强扫描时为1.2915W/kg;普通矢状位、冠状位、轴位增强扫描时为2.7146W/kg,为前者的2.1倍。腹部扫描前5min内CSAD修正后为1.5071W/kg,第二个5min内为0.8940W/kg。[结论]受检者在1.5T磁共振行头颅和腹部扫描的CSAD均未超过美国食品药品管理局制定的安全阈值,但是采用不同的脉冲序列扫描时电磁辐射剂量相差很大。合理选择并优化扫描脉冲序列,缩短检查时间,可有效降低受检者的电磁辐射剂量,防范受检者可能受到的潜在电磁辐射危险。
分支时空结构上的时空逻辑
A Temporal-Spatial Logic for Branching Space-times


- , 2016,
Abstract: Belnap 通过在分支时间结构上添加空间关系,提出了更一般化的分支时空结构。在本文中,我们首次为这种分支时空结构建立相应的逻辑系统。在该逻辑中,我们引入一个空间模态算子来表达模型中的空间关系。我们给出该逻辑的公理系统,并证明它的完备性。
长井段保形连续取心在春晖油田优质储层预测中的应用
Long Well Segment Sealed Freezing Shape Preserving Continuous Coring for Quality Reservoir Prediction in Chunhui Oilfield
 [PDF]

王学忠,
Advances in Geosciences (AG) , 2013, DOI: 10.12677/AG.2013.36048
Abstract:
准噶尔盆地北缘春晖油田属于勘探新区,为薄浅层超稠油地层型油藏,直井或水平井蒸汽吞吐只获得低产油流。为落实储量规模和单井产能,以储层描述和流体预测为攻关重点,哈浅1-1井成功进行了长井段密闭冷冻保形连续取心。通过对岩心的岩性、物性和含油性等特征的描述,为分析油藏特征和确定开发模式提供了重要的技术参数,同时发现储层为泥质胶结含砾砂岩,发育多条薄灰质夹层,含油性随砾石含量增大而变差,砂组砾、砂、泥交互厚度33 m,富含油5.5 m,油浸10.8 m,相应的4个含油层段为相对优质储层。本文的研究成果为最终蒸汽辅助重力泄油开发方案制定提供了有效依据,对薄浅层超稠油开发具有重要生产意义。<br/>Chunhui Oilfield belongs to new exploration area in the Northern Edge of Junggar Basin, and is stratigraphic oil reservoir with thin-shallow super heavy oil. Both vertical well and horizontal well only with steam stimulation most have low producing. For implementing reserve scale and single well production, taking reservoir description and fluid prediction as resolution of key technology, Haqian 1-1 well has successful long well segment shape of preserving continuous coring with sealed freezing. By core description on lithology, physical properties, and oiliness, it provides important technical parameter for analysis of reservoir characteristic and determining development mode, at the same time, it finds that its reservoir is shale cementation pebbled sandstone; multistrip thin gray dissection is developed; oiliness becomes poor with the increasing of gravel content; the interaction thickness of gravel, sand and gray in I sand group is 33 m; the rich oil thickness is 5.5 m; the immersion thickness is 10.8 m; and corresponding four oil-bearing segments are the relatively high-quality reservoir. The result provides effective proof for finally making steam-assisted gravity drainage development project, and it has important significance in the production for development of thin-shallow super heavy oil.
Application Research of Notebook Computer Simulating Card Reader in Attendance System
笔记本模拟读卡器在考勤系统中的应用研究

周蕾,
计算机系统应用 , 2008,
Abstract: 论文以一个会议考勤系统曲开发为例,通过定义主机和笔记本之间的通讯协议,将笔记本电脑模拟成读卡器,实现考勤信息的实时发布,文中详细介绍了系统设计和调试的过程。
Research and Design of Application System Based on RF IC Card
基于射频IC卡的应用系统研究与设计

周蕾,
计算机系统应用 , 2008,
Abstract: 本文以某旅游景点门禁管理系统为例,主要介绍基于射频IC卡应用系统的设计过程,并详细叙述了系统实现的具体技术。
通俗天文书籍的现状——为反对通俗天文书籍中的唯心论而斗争

科学通报 , 1952,
Abstract: 目前流行的通俗天文学書籍,有如下三類:從资本主義國家出版物翻譯的: 星空巡禮(開明青年叢書),皮脫,開明,1936。宇宙之大(開明青年叢書),金斯(即秦斯),開明,1936。趣味的天空,原三田夫,光明書局,1936。通俗天文學(新中學文庫),紐康,商務,1937。流转的星辰(科學常識叢書),金斯,中華,1940。
核磁共振成像技术的实验艺术
郑乔,
现代物理知识 , 2004,
Abstract: 20 0 3年生理学或医学诺贝尔奖授予美、英科学家 ,以奖励他们在核磁共振成像技术方面的贡献。核磁共振技术自 1 94 6年 ,美国哈佛大学的珀塞尔 (E .M .Purcell)和斯坦福大学的布洛赫(F .Bloch)宣布 ,他们发现了核磁共振NMR (nuclearmagneticresonance) (为此 ,他们二人一起获得 1 95 2年度诺贝尔物理学奖 )。至今 ,核磁共振理论已经成为一种探索、研究物质的微观结构和性质的分析手段。 5 0多年来 ,由这项科学发现形成的新技术 ,已取得了惊人的进展 ,不仅广泛应用于物理学、化学、材料科学 ,成为生命科学和医学领域中最重要的分析、诊断…
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