共查询到20条相似文献，搜索用时 78 毫秒
1.
2.
3.
4.
M. Vogel 《Journal of The Franklin Institute》1828,5(1):31-32
5.
6.
7.
当今世界正回响着两句具有客观效应的口号:一曰“未来世纪将是大脑文化世纪”;二曰“21世纪将是亚太区域的世纪”。前者,说的是全人类的未来:大脑智慧文化的未来;后者说的则是区域变迁的趋势:21世纪的世界发展中心将从西欧北美转移到亚洲太平洋地区。由此可见,全人类对自己双肩上扛着的大脑文化已十分重视,悟识到大脑文化是人类文化(文明)之龙头和中枢,且对亚太地区寄予了厚望、关注和信任,相信21世纪将是亚太世纪。中国,地处亚太地区的中心位置,且是亚太地区的大国之一,亚太的发展与中国的发展有着密切的关系。不言而喻,中国对21世纪的亚太发展尤为关注,且更应着力于亚太地区经济、社会和文化科技的发展,从而促进中国的发展。 相似文献
8.
克拉玛依市西盆山交界处发育侏罗纪杏仁玄武岩-橄榄玄武岩-含菱铁矿橄榄玄武岩组合,主要由橄榄石、单斜辉石、斜长石(中长石-拉长石为主)、钛铁矿、玄武玻璃及少量磷灰石组成,含菱铁矿橄榄玄武岩中存在原生菱铁矿(≈10%)和少量碱性长石.橄榄石及单斜辉石的Mg#为≈70,单斜辉石属于富Ti普通辉石.含菱铁矿橄榄玄武岩中的菱铁矿常常包裹浑圆状斜长石,且与斜长石呈锯齿状接触.本文提供的岩相学观察表明,菱铁矿与玄武玻璃、斜长石、单斜辉石和钛铁矿呈明显的共生关系.在有些情况下观察到玄武玻璃与菱铁矿充填在斜长石格架的现象.含菱铁矿橄榄玄武岩玻璃中FeO含量最高至29.2%,CaO含量＜1.5%,即熔体具有富Fe贫Ca的特点.早结晶的碳酸盐矿物是以菱铁矿为主的菱铁矿-白云石固溶体(另含少量菱锰矿).斜长石大量结晶促使熔体不断亏损CaO,并导致较晚结晶的碳酸盐矿物向菱铁矿端元演化.菱铁矿发育有明显的成分梯变带(FeO和CaO含量表现出突变).玄武玻璃的Mg#普遍较低且变化范围大,橄榄玄武岩中玻璃的Mg#值最高为64,含菱铁矿橄榄玄武岩中玻璃的Mg#值最低至≈23.依据地质温压计,克拉玛依侏罗纪玄武岩浆的形成温度为1300℃～1340℃,压力为3.0～4.0GPa.基于本文的研究,我们认为克拉玛依侏罗纪含菱铁矿橄榄玄武岩岩浆由含CO2橄榄岩在软流圈中经极低程度部分熔融形成,该岩浆在快速上升过程中通过结晶分异作用形成了菱铁矿. 相似文献
9.
Public Research Institutes (PRIs) were established for many reasons, such as to promote defence related research and health related research. Helping domestic industries remains one of the important missions for public research institutes even when the countries have industrialized and firms’ technological capabilities are high. PRIs aim to upgrade existing industries, especially SMEs, as well as spearheading new ones. They can conduct research to solve today’s problems of existing industries and those of next generation technologies which might lead to creation of new industries. Moreover, relationship between PRIs and firms and non-firm actors like universities became more intense, open, horizontal, international, and longer term. To reduce risk and uncertainty inherent in research mentioned above, intermediary roles of PRIs are increasingly important. The emphasis and the ways PRIs help industry change over time and vary across countries as they are integral part of national innovation systems. This makes generalization difficult, but the experiences of five leading PRIs in Germany, Taiwan, Japan, Australia, and the US shows that, the balances between contract research vs. longer term research with own initiative, mobility of researchers vs. retaining core researchers, and competitive grants and funds from industry vs. block grants from government are important to keep PRIs relevant to industry needs and maintain research standards. The governance of PRIs is of particular importance to maintain proper balances. 相似文献
10.
《Journal of The Franklin Institute》1826,1(6):350-351
11.
12.
Lei Shuai Gongxun Zhong Quan Yuan Zhiyuan Wen Chong Wang Xijun He Renqiang Liu Jinliang Wang Qinjian Zhao Yuxiu Liu Ningning Huo Junhua Deng Jingjing Bai Hongchao Wu Yuntao Guan Jianzhong Shi Kegong Tian Ningshao Xia Hualan Chen Zhigao Bu 《国家科学评论(英文版)》2021,8(3)
Minks are raised in many countries and have transmitted severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) to humans. However, the biologic properties of SARS-CoV-2 in minks are largely unknown. Here, we investigated and found that SARS-CoV-2 replicates efficiently in both the upper and lower respiratory tracts, and transmits efficiently in minks via respiratory droplets; pulmonary lesions caused by SARS-CoV-2 in minks are similar to those seen in humans with COVID-19. We further found that a spike protein-based subunit vaccine largely prevented SARS-CoV-2 replication and lung damage caused by SARS-CoV-2 infection in minks. Our study indicates that minks are a useful animal model for evaluating the efficacy of drugs or vaccines against COVID-19 and that vaccination is a potential strategy to prevent minks from transmitting SARS-CoV-2. 相似文献
13.
14.
James Smithson 《Journal of The Franklin Institute》1826,2(5):304-306
15.
16.
17.
18.
提高质量 加强立汪 促进我国咨询业健康发展 总被引：1，自引：0，他引：1
成思危 《科学学与科学技术管理》2001,22(8):5-7
编者按:当前咨询业发展在中国遇到了前所未有的机遇与挑战 . 一方面 , 我们正生活在一个政治、经济和技术深刻变革的时代 , 经济的全球化、信息化使人类对未来发展更加难以驾御 , 在这瞬息万变中要想胜券在握 , 人们比任何时候都需要咨询 ; 另一方面 , 我国在加入 WTO的谈判中已承诺开放包括咨询业在内的服务业 , 允许外国公司通过特许经营的方式进行有偿服务活动 . 到那时 , 外国咨询企业的大举进入对我国咨询行业的发展、咨询市场的培育将是一股强大的推动力 , 同时咨询市场的竞争也势必十分激烈 . 如何清醒地认识我国咨询业的现在与未来 , 把握形势 , 抓住机遇 ?下面编发的全国人大常委会副委员长成思危、科技部部长徐冠华就推动我国咨询业发展的几点意见 , 将会给我们以启发和裨益 . 相似文献
19.