[中文]&&&&
戴福初 男 博导 地质与地球物理研究所 电子邮件：daifc@mail.
通信地址：北京市朝阳区北土城西路19号
邮政编码：100029
主要从事地质灾害发生机理与预测预报方面的研究，目前正在开展西南大型串珠状古堰塞湖成因、边坡灾害全自动监测与预警、降雨与灌溉诱发滑坡的发生机理及地震滑坡等方面的研究。
招收工程地质专业硕博连读生、博士生，欢迎相近专业学生报考
1990年7月毕业于西安地质学院水文地质工程地质系，获学士学位；
1993年7月在西安地质学院获水文地质工程地质专业硕士学位；
1997年8月在中国科学院地质研究所获博士学位。
中科院地质所 970801 理学博士学位
1995年11月至1996年11月，香港大学土木与结构工程系研究助理；
1997年8月至1999年5月，中国科学院地理研究所从事博士后；
1999年6月至2001年6月，香港大学土木工程系附属研究员；
2001年6月至2002年2月，中国科学院地理科学与资源研究所工作；
2002年2月至2002年9月，香港大学土木工程系高级研究助理；
2002年10月至2005年10月，香港大学土木工程系研究助理教授，于2004年2月辞职；
2004年2月，中国科学院&百人计划&，中国科学院地质与地球物理研究所研究员、博士生导师
专利与奖励
公开发表论文70余篇，其中在国际杂志发表论文20余篇，发表的第一作者SCI论文被SCI他人引用600余次。代表性论文为&
Dai FC, Tu XB, Xu C, Gong QM, Yao X. Rock avalanches triggered by oblique-thrusting during the 12 May 2008 Ms 8.0 Wenchuan earthquake, China. Geomorphology 2011 (in press).
Dai FC, Xu C, Yao X, Xu L, Tu XB, Gong QM. Spatial distribution of landslides triggered by the 2008 Ms 8.0 Wenchuan earthquake, China. Journal of Asian Earth Sciences 3-895.
Dai FC, Liu YH, Wang SJ. Urban geology: a case study of Tongchuan city, Shaanxi Province, China. Engineering Geology 5-175.
Dai FC, Lee CF, Wang SJ. Analysis of slide-debris flows on Lantau Island, Hong Kong. Engineering Geology 9-290.
Dai FC, Lee CF, Wang SJ, Feng YY. Stress-strain behavior of a loosely compacted volcanic-derived soil and its significance to fill slope failures. Engineering Geology 9-370.
Dai FC, Lee CF. Frequency-volume relation and prediction of rainfall-induced landslides. Engineering Geology 3-266.
Dai FC, Lee CF, Zhang XH. GIS-based geo-environmental evaluation for urban land use planning: a case study. Engineering Geology 7-271.
Dai FC, Lee CF, Ngai YY. Landslide risk assessment and management: an overview. Engineering Geology -87.
Tu XB, Dai FC, Lu XJ, Zhong HY. Toppling and stabilization of the intake slope for the Fengtan Hydropower Station enlargement project, Mid-South China. Engineering Geology 2-167.
Tu XB, Kwong AKL, Dai FC, Tham LG, Min H. Field monitoring of rainfall infiltration in a loess slope and analysis of failure mechanism of rainfall-induced landslides. Engineering Geology 2008 (Accepted).
Dai FC, Lee CF, Deng JH, Tham LG. The 1786 earthquake-triggered landslide dam and subsequent dam-break flood on the Dadu River, southwestern China. Geomorphology 5-221.
Dai FC, Lee CF. Landslide characteristics and slope instability modeling using GIS. Geomorphology -4): 213-228.
Chen J, Dai FC, Yao X. Holocene debris-flow deposits and their implications on climate in the upper Jinsha River valley, China. Geomorphology -4): 493-500.
Yao X, Tham LG, Dai FC. Landslide susceptibility mapping based on Support Vector Machine: A case study on natural slopes of Hong Kong, China. Geomorphology ): 572-582.
Dai FC，Deng JH, Tham LG, Law KT, Lee CF. A large landslide in Zigui County, Three Gorges area. Canadian Geotechnical Journal ): .
Dai FC, Lee CF. Terrain-based mapping of landslide susceptibility using a Geographic Information System: a case study. Canadian Geotechnical Journal ): 911-923.
Dai FC, Lee CF, Li J, Xu ZW. Assessment of landslide susceptibility on the natural terrain of Lantau Island, Hong Kong. Environmental Geology, 40(3): 381-391.
Dai FC, Lee CF, Wang SJ. Characterization of rainfall-induced landslides. International Journal of Remote Sensing 24 (23): .
Dai FC, Lee CF. Landslides on natural terrain: physical characteristics and susceptibility mapping. Mountain Research and Development, ): 40-47.
Dai FC, Lee CF. A spatiotemporal probabilistic modelling of storm-induced shallow landsliding using airphotos and logistic regression. Earth Surface Processes and Landforms 7&545.
Dai FC, Tham LG, Lee CF, Ng KC, Shum WL. Logistic regression modeling of storm-induced shallow landsliding in time and space on natural terrain of Lantau Island, Hong Kong. Bulletin of Engineering Geology and the Environment 5-327.
已指导学生金艳丽&&博士研究生&&081803-地质工程&&姚鑫&&博士研究生&&081803-地质工程&&李国庆&&博士研究生&&081803-地质工程&&安光明&&博士研究生&&081803-地质工程&&李维朝&&博士研究生&&081803-地质工程&&田伟&&硕士研究生&&081803-地质工程&&许冲&&博士研究生&&081803-地质工程&&许领&&博士研究生&&081803-地质工程&&武彩霞&&博士研究生&&081803-地质工程&&曹琰波&&博士研究生&&081803-地质工程&&现指导学生肖建章&&博士研究生&&081803-地质工程&&王明龙&&博士研究生&&081803-地质工程&&王小东&&博士研究生&&081803-地质工程&&
(C)2012 中国科学院大学
地址：北京市石景山区玉泉路19号（甲） 邮编:100049 京ICP备号From Wikipedia, the free encyclopedia
Daithí McKay, MLA (b. 1982, , , ) is an
politician. He is the Education spokesperson for
and the deputy chair of the Enterprise, Trade and Investment Committee in the . He is an MLA for
and was formerly a councillor on .
McKay was born in
in 1982, and resides in , . He attended St Patrick's Primary School in Rasharkin and St. Louis' Grammar School, Ballymena. Before becoming a full-time worker for Sinn Féin he lived in
where he worked for the . Prior to being elected he was involved with
in North Antrim and in aid work in the
, and has done work in [] , the ,
and , where he represented the party youth wing .[]
He was elected to Ballymoney Council in 2005. Daithí was an adviser to
and is currently the youngest member of the Ballymoney Borough Council.
In , it was announced that McKay would contest McGuigan's
seat in the Northern Ireland legislature on 7 March 2007. He went on to claim his seat after the first count, coming second in the poll behind
(DUP). McKay received 7065 votes to Paisley's 7716. Paisley's son,
came in third.[]
Since then, he became one of the first Sinn Féin members to sit on the Policing Board along with
and . He previously sat as Sinn Féin's representative on the Fire and Rescue Services Board. McKay resides in
and has been involved in protests against the
loyalist parade through the mainly nationalist village every 12 July for a number of years.
In September 2007 McKay sparked off a political scandal in the Assembly when he named private developer Seymour Sweeney as a member of the DUP in the Assembly Chamber. The DUP's Environment Minister, , had said that she was 'minded' to approve an application from Sweeney for a private visitor centre at the , even though her Planning Service officials had recommended that it be refused.[]
Foster threatened to take McKay to court over the matter but in January 2008 she decided to refuse the private application.[] In October 2007, a motion put forward by McKay in the Assembly supporting the closure of the British Nuclear power plant at
was carried, even though both the Ulster Unionist and Democratic Unionist parties voted against it. In 2008, McKay set up an all-party working group on , which he currently chairs.[]
In June 2008, he was one of four Sinn Féin councillors in north Antrim who reportedly received death threats.[]
In July 2008, McKay and fellow Sinn Féin member Cllr Padraig McShane sustained minor injuries in a dispute with local republican youths in Ballymena. The dispute arose because of the youths' opposition to the removal of a bonfire to commemorate internment (). McKay said they were in the area "in opposition to criminal and antisocial elements who are using this bonfire as a cover for other activities". The incident was captured by a
camera crew. In May 2009 there were a series of attacks on property in Rasharkin, including an attack on McKay's house and a cafe in the village. The North Antrim MLA blamed anti-social elements 'masquerading as republicans' and said that these people would not deter him from his work as an Irish republican.
In 2011 McKay introduced the "Single Use Plastic Bag Bill" to the Assembly which eventually was passed by the Assembly as the "Single Use Carrier Bag Act 2011". He had raised the matter through a Private Members Debate previously and is believed to be responsible for Sinn Féin ensuring that the levy was included in the Executive's Budget in 2010. [] The current Environment Minister indicated in response to an Assembly question from McKay that the 5 pence levy should be introduced in Northern Ireland through regulations in 2013.[]. The levy is set to increase to 10 pence from 2014, when the levy will also be extended to low cost reusable carrier bags.
McKay has his own
Enterprise, Trade & Investment
Rasharkin Community Association
Chair and Founding member of the Assembly All-Party Working Group on Climate Change
. Politics.ie.
. BBC News. .
Ballymoney Times
. BBC News. .
— Official Sinn Féin biography
— BBC News article
— BBC News article
— BBC News article
Preceded by
Succeeded by
: Hidden categories:已知a＞0,且a≠1,若函数f（x)=a∧lg（x²-2x+3)有最大值,则不等式log（x²-5x+7)＞0的解集为?（指数函数有最大值是什么意思）_百度作业帮
拍照搜题，秒出答案
已知a＞0,且a≠1,若函数f（x)=a∧lg（x²-2x+3)有最大值,则不等式log（x²-5x+7)＞0的解集为?（指数函数有最大值是什么意思）
已知a＞0,且a≠1,若函数f（x)=a∧lg（x²-2x+3)有最大值,则不等式log（x²-5x+7)＞0的解集为?（指数函数有最大值是什么意思）
看函数f(x)=a^lg(x2-2x+3)(x2-2x+3)有最小值2,所以lg(x2-2x+3)有最小值lg2再看指数函数的图像,若a>1,则是一条从左下到右上的曲线,左端无限趋近于0若0
真数x&#178;-2x+3=(x-1)&#178;+2≥2即lg(x&#178;-2x+3)有最小值lg2f(x)=a^lg(x^2-2x+3)有最大值，则0<a<1于是loga(x&#178;-5x+7)>0=loga，1∴x&#178;-5x+7<1x&#178;-5x+6<0(x-2)(x-3)<02<x<3
首先判断a的范围
判断lg（x^2-2x+3）的单调性，注意用同增异减，然后在根据a^lg...
还是同增异减
因为有最大值早出x的范围注意定义域（x ^2-2x+3）>0 这是前提 有了x的范围就可以解log(x^2-5x+7)的解集了 如果还不懂我可以给你写过程，现在不是很方便其实要是能画图像就好了...
x^2-2x+3=(x-1)^2+2有最小值,所以f(x)=a^lg(x^2-2x+3) 有最大值的前提是0<a<1x^2-5x+7=(x-5/2)^2+3/4只有当(x-5/2)^2+3/40因此解集是(x-5/2)^2<1/4解集是2<x<3这里指数函数之所以有最大值是因为他的指数中有最小值的关系
f(x)=(10^lga)^lg(x&#178;-2x+3)=(10^lg(x&#178;-2x+3))^lga=(x&#178;-2x+3)^lga∵(x&#178;-2x+3)^y当y>0时无最大值，只有当y≤0时才有最大值∴lga≤0，即0<a<1后面loga（x&#178;-5x+7)＞0得0<x&#178;-5x+7<10<x&#178;...