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| 1 | A Comprehensive Survey of TDD-Based Mobile Communications Systems from TD-SCDMA 3G to TDLTE-Advanced 4G and 5G directions显示文摘TDD(Time Division Duplex) is one of the two duplex modes.TD-SCDMA(Time division Synchronous CDMA) is the first TDD-based cellular mobile system which is commercialized in wide area and large scale and TD-SCDMA is also the first cellular mobile system which adopted smart antenna technology,also called as beamforming.As the long term evolution of TD-SCDMA,TDLTE(A)(Time Division-Lone Term Evolution,and TD-LTE Advanced) introduced OFDM(Orthogonal Frequency Division Multiplexing)and enhanced smart antenna technology together with MIMO(Multiple Input Multiple Output),which are adopted by LTE FDD(Frequency Division Duplex) either.It is indicated that TD-SCDMA and TD-LTE(A)have opened a sustainable utilization era of TDD and smart antenna Technologies in the wireless mobile communication.This paper aims to present a systematic introduction to TDD-based mobile communications from TD-SCDMA to TD-LTE and beyond and its comparisons to FDD,with particular focuses on TDD key technologies,principles of TDD cellular mobile systems,TDD evolution path,and future TDD 5G directions.We hope that this paper will provide a comprehensive overview of TDD technology upgrade and its standard evolution,and serve as a valuable reference for research on 5G mobile communication systems.It is believed that TDD will play more important role in 5G. | CHEN Shanzhi SUN Shaohui WANG Yingmin XIAO Guojun Rakesh Tamrakar | 2015 | China Communications2015，12，2： | 17 |
| 2 | 多发动脉瘤并发蛛网膜下腔出血患者预后相关因素分析显示文摘目的 探讨多发动脉瘤(MIA)并发蛛网膜下腔出血(SAH)患者预后的影响因素。方法南方医科大学珠江医院神经外科自2000年1月至2011年1月共收治MLA并发SAH患者93例.分析其临床资料并对影响患者预后的因素进行单因素、多元线性回归分析。结果单因素分析结果显示患者性别、是否治疗及是否有高血压病史、Hunt-Hess分级、治疗方式对预后的影响具有统计学意义(P〈0.05);多元线性回归分析结果显示Hunt-Hess分级、治疗方式是影响MIA并发SAH患者预后的独立危险因素(P〈0.05)。结论MLA并发SAH患者的预后受Hunt-Hess分级、治疗方式2个因素影响。早期对破裂动脉瘤判别并处理,对非破裂动脉瘤随访观察、适度干预,大多数患者都可获得满意的预后。 | 权涛 何旭英 李西锋 刘轶靖 Tamrakar Karuna 法志强 罗斌 龙霄翱 张炘 | 2012 | 中华神经医学杂志2012，11，2： | 15 |
| 3 | 破裂动脉瘤栓塞术中再破裂的危险因素分析及处理方法显示文摘目的 探讨颅内破裂动脉瘤术中再破裂(IPR)的危险因素、破裂后的处理方法,评估术后临床效果,为今后术前评估IPR的风险提供理论依据,同时为IPR的治疗策略提供经验性指导.方法 回顾性分析1 628例颅内破裂动脉瘤患者的资料,采用Logistic回归分析颅内破裂动脉瘤IPR的危险因素,并总结IPR的治疗策略,术后所有IPR患者定期接受临床及影像学随访,评估该治疗策略的临床疗效.结果 IPR的发生率为0.98%,死亡率为37.50%.存活的10例患者中有8例得益于发生IPR后立即快速完成动脉瘤栓塞以及静脉注射鱼精蛋白中和肝素钠逆转抗凝,2例得益于急诊脑室外引流.但是7例患者遗留有不同程度的残疾,3例完全康复.微小动脉瘤(直径≤3 mm)( OR 21.086,95% CI 2.009 ~ 221.333,P=0.011)、颅内动脉粥样硬化(OR 39.246,95% CI 2.949~522.373,P=0.005)、FisherⅢ级(OR 127.139,95%CI 3.340~4 839.744,P=0.009)、脑血管痉挛Ⅰ级(OR 111.888,95%CI 4.154 ~3 013.480,P=0.005)和Ⅱ级(OR 93.024,95%CI 5.256~1 646.527,P=0.002)为颅内破裂动脉IPR的危险因素;颈内动脉分叉近端和基底动脉主干处(OR 0.003,95% CI 0.000~0.101,P=0.001)以及Hunt - HessⅡ级(OR 0.003,95% CI 0.000~0.316,P=0.015)为IPR的保护性因素.结论 微小动脉瘤(直径≤3 mm)、颅内动脉粥样硬化、FisherⅢ级以及存在脑血管痉挛(Ⅰ级和Ⅱ级)的患者容易发生IPR;颈内动脉分叉近端和基底动脉主干处以及Hunt - HessⅡ级的动脉瘤较少发生IPR.IPR发生后立即快速完成动脉瘤栓塞,同时予静脉注射鱼精蛋白中和肝素钠逆转抗凝是急诊救治的关键. | 张炘 段传志 李铁林 汪求精 龙霄翱 罗斌 Tamrakar Karuna 何旭英 李西峰 刘晓平 权涛 顾大群 苏世星 赖凌峰 | 2012 | 中华神经外科杂志2012，28，1： | 10 |
| 4 | 基于CSI-RS赋形的大规模天线阵列预编码与反馈方法显示文摘大规模天线阵列的应用是5G技术中提高频谱效率的有效手段.在大规模天线阵列系统中,天线单元的数量显著增长.这些天线单元可以与不同数量的无线射频通道连接,从而映射到多个天线端口上.由于大量的天线单元可以组成不同形状的天线阵列,设计单一的反馈框架来支持不同形态的大规模天线阵列具有很大的挑战性.本文分析了在大规模天线阵列系统中实现多个维度预编码的方法,通过在水平维和垂直维分别进行预编码,充分利用了所有天线单元的天线增益和赋形增益,且所给方法只需要借助目前广泛应用于2D天线阵列的反馈机制.从我们的仿真中可以看出:基于CSI-RS赋形的CSI反馈和相应的预编码算法,相对于传统MIMO处理方式,能够获得显著的性能增益.而且,这种方法只需要一些基站侧的实现,对终端可以是完全透明的,因此对终端的影响很小. | 陈文洪 高秋彬 陈润华 李辉 Tamrakar RAKESH 孙韶辉 | 2016 | 中国科学:信息科学2016，46，1： | 3 |
| 5 | Online Learning Control for Harmonics Reduction Based on Current Controlled Voltage Source Power Inverters显示文摘Nonlinear loads in the power distribution system cause non-sinusoidal currents and voltages with harmonic components.Shunt active filters(SAF) with current controlled voltage source inverters(CCVSI) are usually used to obtain balanced and sinusoidal source currents by injecting compensation currents.However,CCVSI with traditional controllers have a limited transient and steady state performance.In this paper,we propose an adaptive dynamic programming(ADP) controller with online learning capability to improve transient response and harmonics.The proposed controller works alongside existing proportional integral(PI) controllers to efficiently track the reference currents in the d-q domain.It can generate adaptive control actions to compensate the PI controller.The proposed system was simulated under different nonlinear(three-phase full wave rectifier) load conditions.The performance of the proposed approach was compared with the traditional approach.We have also included the simulation results without connecting the traditional PI control based power inverter for reference comparison.The online learning based ADP controller not only reduced average total harmonic distortion by 18.41%,but also outperformed traditional PI controllers during transients. | Naresh Malla Ujjwol Tamrakar Dipesh Shrestha Zhen Ni Reinaldo Tonkoski | 2017 | IEEE/CAA Journal of Automatica Sinica2017，4，3： | 2 |
| 6 | 颅内动脉瘤的血管内栓塞治疗:历史回顾显示文摘1.Introduction Remarkable evolution of endovascular neurosurgery over the past few decades has brought an excellent transformation in the treatment of cerebrovascular diseases.Though aneurysm treatment was begun from the 19th century by means of Hunterian ligation,the concept of endovascular occlusion was first initiated by Luessenhop and Velasquez in 1964 using balloon catheter[1].Endovascular approach has turned out to be a miracle when Guido Guglielmi pioneered in detachable coils in 1990. | Tamrakar Karuna 段传志 Bivek Karki 龙霄翱 张炘 罗斌 李西锋 何旭英 权涛 | 2012 | 中华神经医学杂志2012，11，6： | 2 |
| 7 | Triiodothyronine acutely stimulates glucose transport into L6 muscle cells without in- creasing surface GLUT4, GLUT1, or GLUT3显示文摘 | Teixeira SS Tamrakar AK Goulart-Silva F | 2012 | Thyroid2012，22，7： | 1 |
| 8 | Relationships among mechanical,physical and petrographic properties of Siwalik sandstones显示文摘 | Tamrakar KT Yokota S Shrestha SD | | 0，，： | 1 |
| 9 | Role of RB 蛋白 dephosphorylation in cell cycle regulation 显示文摘 | Tamrakar S Rubin E Ludlow JW | 2000 | Front Biosci2000，5，1： | 1 |
| 10 | Pesticide application and food safety issue in Nepal显示文摘 | Koirala P Dhakal S Tamrakar AS | 2009 | J Agric Environ2009，1，10： | 1 |
| 11 | A toppledstructure with sliding in the Siwalik Hills, midwestem Nepal 显示文摘 | Naresh Kazi Tamrakar Shuichiro Yokota Osamu Osaka | 2002 | Engineering Geology2002，64，4： | 1 |
| 12 | Association between Lac- tobacillus species and bacterial vaginosis-related bacteria, and bac- terial vaginosis scores in pregnant Japanese women 显示文摘 | Tamrakar R Yamada T Furuta I | 2007 | BMC Infect Dis2007，7，： | 1 |
| 13 | Embolization of Ruptured Aneurysm Arising From Basilar Artery Fenestration Using Hydrocoils 显示文摘 | Tamrakar K Chuan Zhi D | 2015 | Cureus2015，7，9： | 1 |
| 14 | Development of a new soil tensile strength test appara- tus 显示文摘 | TAMRAKAR S B MITACHI T TOYOSAWA | 2005 | Geotechnical Special Publication2005，25，1： | 1 |
| 15 | NODI activators link innate immunity to insulin resistance 显示文摘 | Schertzer JD Tamrakar AK Magalhfies JG | 2011 | Diabetes2011，60，9： | 1 |
| 16 | NOD1 activa- tors link innate immunity to insulin resistance 显示文摘 | Schertzer JD Tamrakar AK Magalhres JG | 2011 | Diabetes2011，60，9： | 1 |
| 17 | 复发性家族性颅内动脉瘤的血管内栓塞治疗(附13例报告)显示文摘家族性颅内动脉瘤(familial intracranial aneurysm,FIA)被认为是一种与遗传有关的先天性疾病。与散发颅内动脉瘤相比,FIA破裂率高。随访研究发现,在复发动脉瘤患者中,30%的患者其家族中有一个或多个家族成员出现过动脉瘤性蛛网膜下腔出血(subarachnoid hemorrhage,SAH),甚至存在2次以上的动脉瘤复发。回顾分析1999年3月至2010年7月,我院神经外科13例复发性FIA的诊治资料,现将结果报道如下。 | 张炘 段传志 李铁林 何旭英 李西峰 Tamrakar Karuna 罗斌 龙霄翱 顾大群 苏世星 赖凌峰 | 2012 | 中国神经精神疾病杂志2012，38，6： | 1 |
| 18 | Improved determination of retardation in digital photoelasticity by load stepping显示文摘 | Ramesh K Tamrakar D K | 2000 | Optics and Laser in Engineering2000，33，6： | 1 |
| 19 | Vohage and Frequency Control of Parallel Operated Synchronous Generator and Induction Generator With STATCOM in Micro Hydro Scheme显示文摘 | I Tamrakar L B Shilpakar B G Femandes | 2007 | Generation Transmission & Dis- tribution IET2007，1，5： | 1 |
| 20 | NOD1 activators link innate immunity to insulin resistance 显示文摘 | Schertzer JD Tamrakar AK Magalhaes JG | 2011 | Diabetes2011，60，9： | 1 |
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