【摘 要】
：
随着当前我国生活水平的不断提高,收藏热一浪高过一浪。越来越多的人参与到文化消费当中。很多图书字画收藏爱好者在市场淘得的古旧书刊字画因为保管不善变成残损本,当中尤其
论文部分内容阅读
随着当前我国生活水平的不断提高,收藏热一浪高过一浪。越来越多的人参与到文化消费当中。很多图书字画收藏爱好者在市场淘得的古旧书刊字画因为保管不善变成残损本,当中尤其珍贵的是历史久远的珍善本古代书籍,由于人为的损坏或鼠咬、虫蛀、风化、水湿、火烤等原因,往往不经意间变得破烂不堪,有的甚至失去
With the continuous improvement of living standard in our country, the heat of collection is higher than wave after wave. More and more people are involved in cultural consumption. Many books, calligraphy and painting collectors in the market Amoy old books and periodicals into damaged because of poor management, which is particularly precious is the ancient books of ancient history, due to human damage or rat bites, insects, weathering, water wet , Roasted and other reasons, often inadvertently become dilapidated, and some even lost
其他文献
护底布置在紧靠岸坡堤脚的滩面,是护岸的延续,可减轻冲刷深度,且能填补冲坑,以免堤脚基础沉降危及堤防安全。在设计中,根据河道设防标准不同,护底宽度常按经验数字确定,为冲
美国春意浓美国的“冬天”总算彻底过去了,跟天气一起回暖的还有车市,新车市场的增长兑现和超过了之前行业人士和分析师的预言。3月,美国销售新车154万辆,同比增长5.7%。虽然
欧洲生物农药终端市场的预估价值约为5.4亿美元。日前,欧洲农药市场上5.04%的份额为生物农药。通过统计数据分析,无脊椎生物制剂和传粉昆虫(IBCAs)占据半壁江山。增长速度最
1892年,第一台压燃式内燃机德国工程师狄赛尔在1892年试制成了第一台压燃式内燃机,也就是柴油机。这台柴油机用汽缸吸入纯空气,再用活塞强力压缩,使空气体积缩小到15倍左右,
As a complex aromatic biopolymer that constitutes 25%–35%of renewable carbon on the earth,lignin is the only large-volume renewable source of aromatic chemical
Conjugated block copolymers have gained increasing interests in recent years. Development of a novel method for facile synthesis of conjugated block copolymers
A facile,economical and green strategy to prepare green-fluorescent nitrogen-doped carbon nanodots(NCDs)with a quantum yield(QY)of approximately 31.91%has been
用分光光度法分别对胡椒、花椒、辣椒粉的乙醇浸提液测吸光度,扫描波长范围为700~200 nm,数据间隔为1 nm,积分时间为0.2 s。数据经过处理后得到相应的导数光谱。试验发现,胡
为使尾矿库加高扩容后排洪系统有效运行,基于安全评价理论,结合尾矿库调洪演算的基本原理,介绍了某尾矿库排水系统。采用安全检查表法对排水构筑物及其构成的防洪系统、尾矿
水利水电工程施工生产活动危险性大、不安全因素多,在全世界来说都属于事故多发行业。安全事故给国家和人民群众生命财产带来了巨大损失,促使人们对水利水电工程施工安全问题