检索结果-南通市图书馆

Performance analysis of ARQ schemes with code combining over Nakagami-m fading channel

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2009年第5期16卷 14-19页

作者： XU wen-bo NIU Kai lin Jia-ru HE Zhi-qiang School of Information and Telecommunication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

This article investigates the performance of hybrid automatic repeat request （HARQ） with code combining over the ideally interleaved Nakagami-m fading channel. Two retransmission protocols with coherent equal gain code combining are adopted, where the entire frame and several selected portions of the frame are repeated in protocols I and II, respectively. Protocol II could be viewed as a generalization of the recently proposed reliability-based HARQ. To facilitate performance analysis, an approximation of the product of two independent Nakagami-m distributed random variables is first developed. Then the approximate analysis is utilized to obtain exact frame error probability （FEP） for protocol I, and the upper bound of the FEP for protocol II. Furthermore, the throughput performance of both two protocols is presented. Simulation results show the reliability of the theoretical analysis, where protocol II outperforms protocol I in the throughput performance due to the reduced amount of transmitted information.

关键词： code combining HARQ Nakagami-m fading performance analysis

Routine defunctioning stoma after chemoradiation and total mesorectal excision:A single-surgeon experience

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第11期19卷 1797-1804页

作者： Shao-Chieh lin Po-Chuan Chen Chung-Ta Lee Hong-Ming Tsai Peng-Chan lin Helen HW Chen Yuan-Hwa Wu bo-wen lin wen-Pin Su Jenq-Chang Lee Division of Colorectal Surgery Department of SurgeryNational Cheng Kung University HospitalCollege of Medicine National Cheng Kung University Tainan 704Taiwan Department of Pathology National Cheng Kung University HospitalCollege of Medicine Department of Radiology National Cheng Kung University HospitalCollege of Medicine Department of Oncology National Cheng Kung University HospitalCollege of Medicine Department of Radiation Oncology National Cheng Kung University HospitalCollege of Medicine

AIM:To investigate the 10-year results of treating low rectal cancer by a single surgeon in one ***:From Oct 1998 to Feb 2009,we prospectively followed a total of 62 patients with cT2-4 low rectal cancer with lower tumor margins measuring at 3 to 6 cm above the anal *** patients received neoadjuvant chemoradiation(CRT) for 6 *** them,85% of the patients received 225 mg/m2/d 5-fluorouracil using a portable infusion *** whole pelvis received a total dose of 45 Gy of irradiation in 25 fractions over 5 *** interval from CRT completion to surgical intervention was planned to be approximately 6-8 *** mesorectal excision(TME) and routine defunctioning stoma construction were performed by one *** distal resection margin,circumferential resection margin,tumor regression grade(TRG) and other parameters were *** used TRG to evaluate the tumor response after neoadjuvant *** evaluated anal function outcomes using the Memorial Sloan-Kettering Cancer Center anal function scores after closure of the defunctioning ***:The median distance from the lower margin of rectal cancer to the anal verge was 5 cm:6 cm in 9 patients,5 cm in 32 patients,4 cm in 10 patients,and 3 cm in 11 *** receiving neoadjuvant CRT,45 patients(72.6%) had a cT3-4 tumor,and 21(33.9%) patients had a cN1-2 lymph node *** CRT,30 patients(48.4%) had a greater than 50% clinical reduction in tumor *** final pathology reports revealed that 33 patients(53.2%) had a ypT3-4 tumor and 12(19.4%) patients had ypN1-2 lymph node *** patients completed the entire course of neoadjuvant *** patients developed only Grade 1-2 toxicities during *** patients(21%) achieved a pathologic complete *** post-operative complications *** 90% of the defunctioning stomas were closed within 6 *** local recurrence rate was 3.2%.Pathologic lymph node involvement was the only prognostic factor predicting

关键词： Rectal cancer Neoadjuvant chemoradiation Total mesorectal excision Pathologic complete response Defunctioning stoma

Early acute fat embolism syndrome caused by femoral fracture: A case report

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第27期9卷 8260-8267页

作者： Jia Yang Zhong-Ning Cui Jia-Nan Dong wen-bo lin Jiang-Tao Jin Xiao-Jie Tang Xiao-bo Guo Shao-bo Cui Ming Sun Chen-Chen Ji Department of Orthopaedic Jincheng General HospitalJincheng 048006Shanxi ProvinceChina Department of Gynecology Gaoping People’s HospitalJincheng 048400Shanxi ProvinceChina Department of Orthopaedic Shanghai Changzheng HospitalShanghai 200001China Department of Spinal Surgery The Yantai Affiliated Hospital of Binzhou Medical UniversityYantai 264000Shandong ProvinceChina Department of Critical Care Medicine Jincheng General HospitalJincheng 048006Shanxi ProvinceChina Department of Emergency Jincheng General HospitalJincheng 048006Shanxi ProvinceChina

BACKGROUND Fat embolism syndrome(FES)is a rare complication caused by the presence of fat particles in the microcirculation,which usually occurs within 12-72 h after *** present,there have been few cases of fat embolism presenting within 3 h after ***,we report a case of femoral fracture complicated with an acute fat embolism caused by a car *** SUMMARY A 29-year-old woman with pain,swelling and limited movement of her left lower limb after a car accident was taken by ambulance to our hospital.X-ray examination showed fracture of the middle and lower part of the left femur and fracture of the base of the left fifth metatarsal *** was hospitalized and admitted to the orthopedic *** the attending doctor performed tibial tubercle bone traction,the patient became confused,followed by respiratory ***,she was transferred to the intensive care *** nearly a month of treatment in the intensive care unit,the patient's cognitive function gradually recovered over 6 *** For patients with early traumatic fractures,young emergency physicians and orthopedics should be aware of the possibility of FES.

关键词： Fat embolism syndrome Femoral fracture Respiratory distress Diagnosis Outcome Case report

Research of Using CaSi Powder to Deoxidize Moten Steel for Rectangular Bloom

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第S2期18卷 207-210页

作者： WANG De-yong, LIU wen-bo, lin Dong, LI Bing-qiang, DONG Zhi-peng (Steelmaking Plant BenXi Steel, Benxi 117000, Liaoning, China) Steelmaking Plant BenXi Steel Benxi 117000 Liaoning Peoples R China

Aiming at the nozzle blocking problem in rectangular bloom production, analyze the reason, and put forword to using non-aluminium producing process to solve this problem. By analysis the experiment data, that indicate using non-aluminium process we can get good desulfurization and white slag, also get good castability and best quality. This process can fulfill the requirement of produce, it is reasonable and feasible.

关键词： calcium-silicon compound deoxidizer non-aluminium nozzle blocking

Cooperative HARQ protocol and diversity analysis of systems with multiple incremental relays

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2009年第5期16卷 8-13页

作者： FAN Bin , WANG wen-bo, lin Yi-cheng, ZHENG Kan Wireless Signal Processing and Network Lab, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China [a]Wireless Signal Processing and Network Lab Key Laboratory of Universal Wireless Communication Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

Wireless networks contain an inherent distributed spatial diversity that can be exploited by relays. Relay networks can take advantage of the broadcast-oriented nature of wireless transmission, but require more radio resource to transmit data for their multi-hop traits. Fortunately, incremental relaying technique, which can choose direct or multi-hop transmission adaptively, can efficiently utilize resource. In this article, the incremental transmission with amplify-and-forward （AF） relays is focused on. A practical hybrid-automatic retransmission request （HARQ） protocol is designed, and the related optimal relay selection strategy is proposed. To analyze the cooperative diversity of system with the proposed protocol, the capacity lower bound is deduced. Simulation and analytical results indicate that by adopting the optimal relay selection strategy, the system with the proposed HARQ protocol can achieve an order of cooperative diversity that equals the aggregated number of the relay and source nodes.

关键词： cooperative HARQ AF incremental relay diversity gain

Functional MR Imaging Study on the Brain in Stroke Patients with Upper Limb Paralysis Treated with Constraint-induced Movement Therapy

在线全文

学校读者我要写书评

暂无评论

Functional MR Imaging Study on the Brain in Stroke Patients ...

以红色文化教育提升大学生思想政治教育实效性研究

中华医学会第16次全国放射学学术大会

作者： bo wen lin Ma Department of Radiology PLA General Hospital

PURPOSE To study the correlation between the activation patterns of upper-limb stroke treated with constraint-induced movement therapy(CIMT) in order to explore the mechanism of CIMT. METHOD AND MATERIALS Six patients...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

湘潭大学学报（哲学社会科学版） 2024年第2期48卷 125-131页

作者：文林波张雄艳湘潭大学马克思主义学院湖南湘潭411100

以红色文化教育提升大学生思想政治教育实效性,其核心意涵是运用红色文化从马克思主义意识形态、中国特色社会主义道路制度、中国共产党的领导、社会主义核心价值观等方面全面提升教育的认同效果。红色文化为提升大学生思想政治教育实... 详细信息

以红色文化教育提升大学生思想政治教育实效性,其核心意涵是运用红色文化从马克思主义意识形态、中国特色社会主义道路制度、中国共产党的领导、社会主义核心价值观等方面全面提升教育的认同效果。红色文化为提升大学生思想政治教育实效性提供认同资源、历史论证、情感纽带和精神引领,具有独特的价值存在。建构红色文化提升大学生思想政治教育实效性的路径体系,要加强红色文化的理论教育,以“理”服人深化大学生理论认知;优化红色文化的人物宣传,以“情”动人激发大学生政治情感;廓清红色文化的历史逻辑,以“史”育人锤炼大学生理想信念;用好红色文化的场馆资源,以“境”感人引导大学生身体力行;促进红色文化的精神传承,以“魂”铸人塑造大学生精神信仰。

关键词：红色文化大学生思想政治教育实效性

在线全文

学校读者我要写书评

暂无评论

季冻区隧道过渡段二衬短周期冻融数值模拟

岩土工程学报 2017年第10期39卷 1930-1935页

作者：伍毅敏李文博傅鹤林刘敏捷中南大学土木工程学院湖南长沙410075 五邑大学土木建筑学院广东江门529020

衬砌、围岩中的反复冻融往往伴随着开裂、剥落等风化作用,传统的防冻理论假定环境年温度正弦变化从而低估了二衬冻融次数。自主开发了一款适应低温环境的温度自动记录仪,对季冻区隧道过渡段衬砌表面温度进行了长期、高频监测。推导了适... 详细信息

衬砌、围岩中的反复冻融往往伴随着开裂、剥落等风化作用,传统的防冻理论假定环境年温度正弦变化从而低估了二衬冻融次数。自主开发了一款适应低温环境的温度自动记录仪,对季冻区隧道过渡段衬砌表面温度进行了长期、高频监测。推导了适应复杂初始、边界条件的多层圆筒一维瞬态导热差分方程,通过算例验证了其计算精度。将监测数据作为边界条件代入差分方程模拟了真实衬表温度波动下隧道过渡段二衬冻融过程,并探讨了保温层铺设位置对冻融的影响。结果表明:距衬表约5 cm范围内温度波动剧烈;二衬内部每年会经历一次季节性冻结及若干次短周期冻融;在二衬与初支之间铺设保温层后,短周期冻融循环次数及季节性冻结起、止时间基本不变,而短周期冻融深度有所扩大;在二衬表面铺设保温层能使内部始终处于正温,有利于隧道防冻。

关键词：季冻区隧道连续实测差分冻融保温层

在线全文

学校读者我要写书评

暂无评论

颗粒物质的两个典型效应及其研究现状的分析

物理实验 2004年第3期24卷 44-46页

作者：肖文波胡林贵州大学物理系贵州贵阳550025

概述了颗粒物质领域中粮仓现象和巴西坚果效应两个典型现象及其解释理论 ,分析其理论的成功和不足之处 ,并给出了一些看法 .

关键词：颗粒物质粮仓现象巴西坚果效应摩擦理论唯象系数摩擦因数