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近海环境中抗生素分析样品前处理技术的研究进展 期刊论文
色谱, 2020, 卷号: 38, 期号: 1, 页码: 95-103
作者:  吕敏;  陈令新
收藏  |  浏览/下载：114/0  |  提交时间：2020/07/08
抗生素  近海  前处理技术  综述  antibiotics  coastal  pretreatment techniques  review  The widespread and massive usage of antibiotics for the prevention and treatment of diseases in human and animals have resulted in their continuous discharge into the environment, and finally, into the coastal environment through various pathways. Accumulation of antibiotics in aquatic organisms poses a great threat to ecological and human health, especially because it facilitates the generation and spread of bacterial resistance. Given the diverse range of antibiotics with various features, as well as their presence at low concentrations in the environment, it is imperative to develop pretreatment techniques for antibiotics in various matrices. In this paper, the pretreatment methods proposed in recent decades for antibiotics in coastal water, sediment, and biota are summarized, with emphasis on commonly used methods such as solid-phase extraction, solid-liquid extraction, matrix solid-phase dispersion, and QuEChERS. Additionally, the potential factors influencing the extraction performance and clean-up efficiency are analyzed. The advantages and disadvantages of the methods and their development are finally discussed.  
A review on mixture design methods for self-compacting concrete 期刊论文
Construction and Building Materials, 2015, 卷号: Vol.84, 页码: 387-398
作者:  Shi, CJ;  Wu, ZM;  Lv, KX;  Wu, LM
收藏  |  浏览/下载：1/0  |  提交时间：2019/12/31
中国科举制度的演变与利弊分析 期刊论文
2013
黄声豪
收藏  |  浏览/下载：4/0  |  提交时间：2016/05/17
论格式条款的利用及其综合规制 ——主要以格式保险合同为例 学位论文
2013, 2012
颜钰棚
收藏  |  浏览/下载：2/0  |  提交时间：2016/02/14
The design and research for the shaping of the LDA (EI CONFERENCE) 会议论文
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
Xu X.; Wang L.; Zhou M.
收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25
A vertex tracking technique based on airborne opticalequipment (EI CONFERENCE) 会议论文
2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China
Li Q.
收藏  |  浏览/下载：11/0  |  提交时间：2013/03/25
Analysis of zenith pass problem in a roll-pitch optics seeker (EI CONFERENCE) 会议论文
2011 International Conference on Electronics and Optoelectronics, ICEOE 2011, July 29, 2011 - July 31, 2011, Dalian, China
Jiang H.; Jia H.; Wei Q.
收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25
There are mainly two kind of structures for a missile two-axes seeker  which is always mentioned as elevate-azimuth and roll-pitch. The elevate-azimuth structured seeker has been studied for a long time  and it is applied in all sort of missiles. Not only structure design but also control algorithm of the elevate-azimuth seeker are deeply developed. But for elevate-azimuth seeker there are several disadvantages such as big size and large abaxial angle blind. So the elevate-azimuth seeker gimbal angle is designed up to 65 according to relative references. In modern air war  it is important for a missile to have the ability of "first recognize" and "first attack". That means the air to air missile seeker is required to be a system with large gimbal angle and large abaxial launch angle. With the mentioned requirement  roll-pitch seeker with its advantages smart size and large gimbal angle is studied widely and deeply. The pitch angle of roll-pitch is up to 90 while its roll angle up to n 360. But there are also some disadvantages for the roll-pitch seeker  the most troublesome one is the zenith pass problem. The zenith pass problem is brought about from the gimbal kinematics  it is said that when target moves in the center of image plane  roll servo command gotten from the kinematics algorithm will go to infinite. Math model of zenith pass problem is proposed in this paper and two ways to solve the problem are brought forward. 2011 IEEE.  
中国气候与环境演变评估(Ⅱ):气候与环境变化的影响与适应、减缓对策 期刊论文
2010, 2010
陈宜瑜; 丁永建; 佘之祥; 林而达; 潘家华; 周广胜; 王守荣; 周大地; 李从先; 张建云; 徐国弟; 刘春蓁; 吴宗鑫; CHEN Yiyu; DING Yongjian; SHE Zhixiang; LIN Erda; PAN Jiahua; ZHOU Guangsheng; WANG Shourong; ZHOU Dadi; LI Congxian; ZHANG Jianyun; XU Guodi; LIU Chunzhen; WU Zongxin
收藏  |  浏览/下载：3/0
Athermalization of coaxial reflective space telescope (EI CONFERENCE) 会议论文
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, April 26, 2010 - April 29, 2010, Dalian, China
Lei Z.; Guang J.
收藏  |  浏览/下载：13/0  |  提交时间：2013/03/25
论省市共建“以省为主”和“以市为主”之利弊----新建地方本科院校管理体制改革研究 学位论文
2010, 2009
黄海群
收藏  |  浏览/下载：1/0  |  提交时间：2016/02/14

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