http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : ( Jianyi Liu ) (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
-
Jianyi Sun,Xiaosun Liu,Qing Zhang,Yanyun Hong,BIN SONG,Xiaodong Teng,Jiren Yu 대한영상의학회 2016 Korean Journal of Radiology Vol.17 No.4
Standard therapy has not been established for thyroid cancer when a thyroidectomy is contraindicated due to systemic disease. Herein, we reported a patient who had hypertrophic cardiomyopathy and papillary thyroid carcinoma treated by radiofrequency ablation because of inability to tolerate a thyroidectomy. Radiofrequency ablation can be used to treat thyroid cancer when surgery is not feasible, although the long-term outcome needs further observation.
-
A Study on the Selected Threshold of Image Edge Detection
Zhao Xiaofeng,Liu Jianyi 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.3
Threshold setting is an important part of image edge detection, and directly affect the edge detection result. This paper proposes a threshold search scheme based on genetic algorithm, the secondary search optimization of the improved genetic algorithm is divided into two times to seek the global optimal solution, namely using the results of the search for solution for the first time to determine the second optimization selection of initial population, as a result of the optimization may be given for the first time is not necessarily the global optimal solution, but it certainly is a good result, the optimization process will be the second time, the initial population of restrictions in a neighborhood of the search results for the first time. The simulation results proved the advantage of the proposed algorithm.
-
Jianyao Zhu,Jianyi Liu,Zhaorong Zhou,Li Li 한국전자통신연구원 2016 ETRI Journal Vol.38 No.6
This paper addresses the resource allocation (RA) problem in multi-cell cognitive radio networks. Besides the interference power threshold to limit the interference on primary users PUs caused by cognitive users CUs, a proportional fairness constraint is used to guarantee fairness among multiple cognitive cells and the impact of imperfect spectrum sensing is taken into account. Additional constraints in typical real communication scenarios are also considered—such as a transmission power constraint of the cognitive base stations, unique subcarrier allocation to at most one CU, and others. The resulting RA problem belongs to the class of NP-hard problems. A computationally efficient optimal algorithm cannot therefore be found. Consequently, we propose a suboptimal RA algorithm composed of two modules: a subcarrier allocation module implemented by the immune algorithm, and a power control module using an improved sub-gradient method. To further enhance algorithm performance, these two modules are executed successively, and the sequence is repeated twice. We conduct extensive simulation experiments, which demonstrate that our proposed algorithm outperforms existing algorithms.
-
Ji, Junyi,Liu, Jilei,Lai, Linfei,Zhao, Xin,Zhen, Yongda,Lin, Jianyi,Zhu, Yanwu,Ji, Hengxing,Zhang, Li Li,Ruoff, Rodney S. American Chemical Society 2015 ACS NANO Vol.9 No.8
<P>We report the fabrication of a three-dimensional free-standing nitrogen-doped porous graphene/graphite foam by <I>in situ</I> activation of nitrogen-doped graphene on highly conductive graphite foam (GF). After <I>in situ</I> activation, intimate “sheet contact” was observed between the graphene sheets and the GF. The sheet contact produced by <I>in situ</I> activation is found to be superior to the “point contact” obtained by the traditional drop-casting method and facilitates electron transfer. Due to the intimate contact as well as the use of an ultralight GF current collector, the composite electrode delivers a gravimetric capacity of 642 mAh g<SUP>–1</SUP> and a volumetric capacity of 602 mAh cm<SUP>–3</SUP> with respect to the whole electrode mass and volume (including the active materials and the GF current collector). When normalized based on the mass of the active material, the composite electrode delivers a high specific capacity of up to 1687 mAh g<SUP>–1</SUP>, which is superior to that of most graphene-based electrodes. Also, after ∼90 s charging, the anode delivers a capacity of about 100 mAh g<SUP>–1</SUP> (with respect to the total mass of the electrode), indicating its potential use in high-rate lithium-ion batteries.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2015/ancac3.2015.9.issue-8/acsnano.5b03888/production/images/medium/nn-2015-03888k_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn5b03888'>ACS Electronic Supporting Info</A></P>
-
Defense Strategy of Network Security based on Dynamic Classification
( Jinxia Wei ),( Ru Zhang ),( Jianyi Liu ),( Xinxin Niu ),( Yixian Yang ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.12
In this paper, due to the network security defense is mainly static defense, a dynamic classification network security defense strategy model is proposed by analyzing the security situation of complex computer network. According to the network security impact parameters, eight security elements and classification standard are obtained. At the same time, the dynamic classification algorithm based on fuzzy theory is also presented. The experimental analysis results show that the proposed model and algorithm are feasible and effective. The model is a good way to solve a safety problem that the static defense cannot cope with tactics and lack of dynamic change.
ScienceON
KISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
