|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Optimal power allocation for cognitive relay networks: amplify-and-forward versus selection relay显示文摘We consider a cognitive relay network which is defined by a source,a destination,and cognitive relay nodes and primary user nodes.In this network,a source is assisted by cognitive relay nodes which allow coexisting with primary user nodes by imposing severe constraints on the transmission power so that they operate below the noise floor of primary user nodes.In this paper,we mainly study the power allocation strategies of this system to minimize the outage probability subject to total and individual power constraints for cognitive relay nodes and subject to interference constraints for primary user nodes.A relay transmission scheme,namely amplify-and-forward (AF),is considered.We first present an optimal power allocation (OPA) scheme to minimize the system outage probability,based on instantaneous channel state information among the source,destination and relay nodes and mean channel gains between primary user nodes and cognitive relays.Next,we propose a selection AF scheme (S-AF) where the single best relay is chosen to assist in the transmission and study power allocation strategy for S-AF to minimize outage probability.The analytical power allocation strategies have been validated through numerical simulations.The results indicate that the AF with OPA and S-AF with OPA have significantly better outage behavior and average throughput than AF and S-AF schemes respectively.We also find that S-AF with OPA achieves a higher throughput,and hence lower outage probability than AF with OPA. | YUE WenJing ZHENG BaoYu MENG QingMin YUE WenJie CUI JingWu | 2011 | Science China(Information Sciences)2011，54，4： | 3 |
| 2 | Induction of CD4+CD25+Foxp3+ regulatory T cell response by glatiramer acetate in type 1 diabetes显示文摘Glatiramer 醋酸盐(GA ) 是过去常对待多重硬化的 immunomodulatory 肽药。它的处理效果被扩展了到象 uveoretinitis,煽动性的肠疾病,接枝拒绝和肝的纤维变性那样的另外的自体免疫的条件。这里,我们报导 GA 在在 cyclophosphamide (CY ) 改变糖尿病的临床的功课是有效的加强的非肥胖的糖尿病患者(CY 点头) 老鼠。有显著地减少的 GA 的治疗在老鼠和改善 insulitis 的糖尿病的率,它与增加的 CD4+CD25+Foxp3+ T 房间反应与一致在对待老鼠。GA 处理导致了抄写因素 Foxp3 的增加的表示并且在 vivo 并且在 vitro 提高了 interleukin-4 (IL-4 ) 的生产。Foxp3 的起来规定上的 GA 的效果通过 IL-4 部分被调停,是明显的。IL-4 被发现维持 Foxp3 表示和 CD4+CD25+ 规章的 T 房间(Tregs ) 的规章的功能。这研究提供 GA 通过 Tregs 的正式就职为类型 1 糖尿病有处理潜力,那增加的 IL-4 生产为提高的 Treg 在 GA 处理的功能部分负责的新证据。 | Guoliang Cui Yuebo Zhang Zhenwei Gong Jingwu Z Zhang Ying Qin Zang | 2009 | Cell Research2009，19，5： | 1 |
| 3 | COOPERATIVE MIMO SPECTRUM SENSING BASED ON RANDOM MATRIX THEORY显示文摘Random Matrix Theory (RMT) is a valuable tool for describing the asymptotic behavior of multiple systems,especially for large matrices. In this paper,using asymptotic random matrix theory,a new cooperative Multiple-Input Multiple-Output (MIMO) scheme for spectrum sensing is proposed,which shows how asymptotic free property of random matrices and the property of Wishart distribution can be used to assist spectrum sensing for Cognitive Radios (CRs). Simulations over Rayleigh fading and AWGN channels demonstrate the proposed scheme has better detection performance compared with the energy detection techniques even in the case of a small sample of observations. | Wang Lei Zheng Baoyu Cui Jingwu Chen Chao | 2010 | Journal of Electronics(China)2010，27，2： | 0 |
| 4 | Recent advances in the application of MXenes for neural tissue engineering and regeneration显示文摘Transition metal carbides and nitrides(MXenes)are crystal nanomaterials with a number of surface functional groups such as fluorine,hydroxyl,and oxygen,which can be used as carriers for proteins and drugs.MXenes have excellent biocompatibility,electrical conductivity,surface hydrophilicity,mechanical properties and easy surface modification.However,at present,the stability of most MXenes needs to be improved,and more synthesis methods need to be explored.MXenes are good substrates for nerve cell regeneration and nerve reconstruction,which have broad application prospects in the repair of nervous system injury.Regarding the application of MXenes in neuroscience,mainly at the cellular level,the long-term in vivo biosafety and effects also need to be further explored.This review focuses on the progress of using MXenes in nerve regeneration over the last few years;discussing preparation of MXenes and their biocompatibility with different cells as well as the regulation by MXenes of nerve cell regeneration in two-dimensional and three-dimensional environments in vitro.MXenes have great potential in regulating the proliferation,differentiation,and maturation of nerve cells and in promoting regeneration and recovery after nerve injury.In addition,this review also presents the main challenges during optimization processes,such as the preparation of stable MXenes and long-term in vivo biosafety,and further discusses future directions in neural tissue engineering. | Menghui Liao Qingyue Cui Yangnan Hu Jiayue Xing Danqi Wu Shasha Zheng Yu Zhao Yafeng Yu Jingwu Sun Renjie Chai | 2024 | Neural Regeneration Research2024，19，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员