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| 1 | Optical observations of LIGO source GW 170817 by the Antarctic Survey Telescopes at Dome A,Antarctica显示文摘The LIGO detection of gravitational waves(GW) from merging black holes in 2015 marked the beginning of a new era in observational astronomy. The detection of an electromagnetic signal from a GW source is the critical next step to explore in detail the physics involved. The Antarctic Survey Telescopes(AST3),located at Dome A, Antarctica, is uniquely situated for rapid response time-domain astronomy with its continuous night-time coverage during the austral winter. We report optical observations of the GW source(GW 170817) in the nearby galaxy NGC 4993 using AST3. The data show a rapidly fading transient at around 1 day after the GW trigger, with the i-band magnitude declining from 17:23 ± 0:13 magnitude to 17:72 ± 0:09 magnitude in ~1:8 h. The brightness and time evolution of the optical transient associated with GW 170817 are broadly consistent with the predictions of models involving merging binary neutron stars. We infer from our data that the merging process ejected about ~10^(-2) solar mass of radioactive material at a speed of up to 30% the speed of light. | lei hu xuefeng wu igor andreoni michael c.b.ashley jeff cooke xiangqun cui fujia du zigao dai bozhong gu yi hu haiping lu xiaoyan li zhengyang li ensi liang liangduan liu bin ma zhaohui shang tianrui sun n.b.suntzeff charling tao syed a.uddin lifan wang xiaofeng wang haikun wen di xiao jin xu ji yang shihai yang xiangyan yuan hongyan zhou hui zhang jilin zhou zonghong zhu | 2017 | Science Bulletin2017，62，21： | 6 |
| 2 | THE COMPOUND BINOMIAL MODEL WITH A CONSTANT DIVIDEND BARRIER AND PERIODICALLY PAID DIVIDENDS显示文摘在一个经常的红利障碍和周期性地付钱的红利下面在剩余上与利息考虑复合二项式的风险模型。为打折的红利支付的金额的任意的时刻的不可分的方程的一个系统被导出直到毁灭。而且在一个很放松的条件下面,任意的时刻的解决方案被因为不可分的方程的系统的一个特殊性质,安装重复进程获得。 | Jiyang TAN Xiangqun YANG | 2012 | Journal of Systems Science & Complexity2012，25，1： | 4 |
| 3 | A Markov decision problem in a risk model with interest rate and Markovian environment显示文摘We consider the compound binomial model in a Markovian environment presented by Cossette et al.(2004). We modify the model via assuming that the company receives interest on the surplus and a positive real-valued premium per unit time, and introducing a control strategy of periodic dividend payments. A Markov decision problem arises and the control objective is to maximize the cumulative expected discounted dividends paid to the shareholders until ruin minus a discounted penalty for ruin. We show that under the absence of a ceiling of dividend rates the optimal strategy is a conditional band strategy given the current state of the environment process. Under the presence of a ceiling for dividend rates, the character of the optimal control strategy is given. In addition, we offer an algorithm for the optimal strategy and the optimal value function.Numerical results are provided to illustrate the algorithm and the impact of the penalty. | TAN JiYang YANG XiangQun LI ZiQiang CHENG YangJin | 2016 | Science China Mathematics2016，59，1： | 2 |
| 4 | Development of a novel rhodamine-type fluorescent probe to determine peroxynitrite显示文摘 | Yang Xiaofeng Guo Xiangqun Zhao Yibing | 2002 | Talanta2002，57，5： | 1 |
| 5 | Influence of fungal fermentation on the development of volatile compounds in the Puer tea manufacturing process显示文摘 | XU Xiangqun YAN Mingchao ZHU Yang | 2005 | Engineering in Life Sciences2005，5，4： | 1 |
| 6 | Design and Synthesis of Proteolysis Targeting Chimeras for Inducing BRD4 Protein Degradation显示文摘 | WANG Shihui LI Haiyan WANG Yue GAO Yang YU Shanshan ZHAO Qianqian JIN Xiangqun LU Haibin | 2018 | Chemical Research in Chinese Universities2018，34，2： | 1 |
| 7 | Some properties of repeated hits after first explosion for birth and death processes显示文摘 | Xiangqun Yang | 1999 | Science in China Series A: Mathematics1999，，5： | 1 |
| 8 | Distributions of lifetime after explosion for birth and death processes显示文摘 | Xiangqun Yang | 1998 | Science in China Series A: Mathematics1998，，7： | 1 |
| 9 | A multi-factor valuational model for pricing option with double exponential jump risk显示文摘 | Deng Guohe Yang Xiangqun | 2006 | Lecture Notes in Decision Sciences2006，7，： | 1 |
| 10 | 显示文摘 | Yang Xiaofeng Guo Xiangqun Zhao Yibing | 2002 | Analytica Chimica Acta2002，456，1： | 1 |
| 11 | Identifying transition rates of ionic channel of star-graph branch type显示文摘 | Xiang Xuyan Yang Xiangqun Deng Yingchun | 2006 | J Phys A:Math and Gen2006，39，： | 1 |
| 12 | Novel spectrofluorimetric method for the determination of sulfite with rhodamine B hydrazide in a micellar medium显示文摘 | YANG Xiaofeng GUO Xiangqun ZHAO Yibing | 2002 | Analytica Chimica Acta2002，456，： | 1 |
| 13 | Joint distributions of first hitting time and first hitting location after explosion for birth and death processes显示文摘 | Xiangqun Yang Shaoyue Liu | 2000 | Science in China Series A: Mathematics2000，，10： | 1 |
| 14 | Some properties of repeated hits after first explosion for birth and death processes显示文摘 | Xiangqun Yang | 1999 | Science in China Series A: Mathematics1999，，5： | 1 |
| 15 | Distributions of lifetime after explosion for birth and death processes显示文摘 | Xiangqun Yang | 1998 | Science in China Series A: Mathematics1998，，7： | 1 |
| 16 | Investigation of the anthracene-nitroxide hybrid molecule as a probe for hydroxyl radicals显示文摘 | Yang Xiaofeng Guo Xiangqun | 2001 | The Royal Society of Chemistry Analyst2001，126，： | 1 |
| 17 | Investigation of the anthracenenitroxide hybrid molecule as a probe for hydroxyl radicals显示文摘 | Yang Xiaofeng Guo Xiangqun | 2001 | The Royal Society of Chemistry Analyst2001，126，： | 1 |
| 18 | A Markov- modulated Jump-diffusion Risk Model with Randomized Observation Periods and Threshold Dividend Strategy 显示文摘 | Chen Xu Xiao Ting Yang Xiangqun | 2014 | Insurance: Mathematics and Economics2014，54，1： | 1 |
| 19 | Identifying transition rates of ionic channel of star-graph branch type显示文摘 | Xiang Xuyan Yang Xiangqun Deng Yingchun | 2006 | J Phys A:Math and Gen2006，39，： | 1 |
| 20 | Optimization of Verti cillium lecanii spore production in solid-state fermentation on sugarcane bagasse 显示文摘 | Shi Yujie Xu Xiangqun Zhu Yang | 2009 | Appl Microbiol Biotechnol2009，82，： | 1 |
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