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| 1 | 基于信道和队列状态信息的跨层最优功率分配显示文摘研究基于完备信道和队列状态的最优功率分配策略。通过联合物理层和网络层的模型,建立了系统的跨层模型,进而在此基础上建立了功率分配的跨层优化问题。给出跨层最优功率分配问题的解析最优解和相应的算法,即'地窖注水'算法。说明传统的'注水策略'仅仅是所提出的地窖注水算法在不考虑队列长度下的一个特例。仿真将验证所提出策略相对于传统功率分配策略的性能优势。在同样的数据包到达率下,所提出的功率分配策略可以达到更小的排队时延。 | 陈巍 曹志刚 樊平毅 LETAIEF K B | 2007 | 通信学报2007，28，8： | 8 |
| 2 | Potential predictive factors for pathologic complete response after the neoadjuvant treatment of rectal adenocarcinoma:a single center experience显示文摘Objective:To assess the response rate of patients with rectal adenocarcinoma to neoadjuvant therapy and to identify the predictors of histological regression after neoadjuvant radiotherapy(RT)or concurrent chemoradiotherapy(CCRT).Methods:This study recruited 64 patients.The patients had resectable cancer of the lower and the middle rectum(T3/T4 and/or N+)without distant metastasis and received neoadjuvant RT or CCRT followed by radical surgery with total mesorectal excision(TME)between January 2006 and December 2011.The patients were classified into non-response(NR),partial response(PR),and pathologic complete response(p CR)based on the Dworak tumor regression grading system.Results:The median age of patients was 57 years(ranging from 22 to 85).A total of 24 patients were treated with neoadjuvant CCRT,whereas 40 patients were treated with RT alone.Abdominoperineal resection(APR)was performed on 29 patients(45%).Anterior resection with TME was performed on 34 patients(53%).One patient had local resection.Histologically,12(19%),24(73%),and 28(44%)patients exhibited p CR,PR,and NR,respectively.Univariate analysis revealed that the predictors of tumor regression were as follows:the absence of lymph node involvement from initial imaging(c N0)(P=0.021);normal initial carcinoembryonic antigen(CEA)level(P=0.01);hemoglobin level≥12 g/dl(P=0.009);CCRT(P=0.021);and tumor downstaging in imaging(P=0.001).Multivariate analysis showed that the main predictors of p CR were CT combined with neoadjuvant RT,c N0stage,and tumor regression on imaging.Conclusions:Identifying the predictors of p CR following neoadjuvant therapy aids the selection of responsive patients for nonaggressive surgical treatment and possible surveillance. | Feryel Letaief Meher Nasri Mouna Ayadi Khedija Meddeb Amina Mokrani Yosra Yahyaoui Nesrine Chraiet Henda Raies Amel Mezlini | 2017 | Cancer Biology & Medicine2017，14，3： | 3 |
| 3 | Association of hepatitis C virus infection and diabetes in central Tunisia显示文摘AIM:To investigate hepatitis C virus(HCV) seroprevalence in Tunisian patients with diabetes mellitus and in a control group.METHODS:A cross-sectional study was conducted to determine the HCV seroprevalence in 1269 patients with diabetes(452 male,817 female) and 1315 nondiabetic patients,attending health centers in Sousse,Tunisia.HCV screening was performed in both groups using a fourth-generation enzyme immunoassay.RESULTS:In the diabetic group,17(1.3%) were found to be HCV-infected compared with eight(0.6%) in the control group,although the difference was not significant(P=0.057).Quantitative PCR was performed in 20 patients.Eleven patients were positive and showed HCV genotype 1b in all cases.CONCLUSION:Frequency of HCV antibodies was low in patients with diabetes and in the control group in central Tunisia,with no signifi cant difference between the groups. | Naoufel Kaabia Elhem Ben Jazia Ines Slim Imen Fodha Wissem Hachfi Rafika Gaha Mabrouk Khalifa Aoutef Hadj Kilani Halim Trabelsi Ahmed Abdelaziz Fethi Bahri Amel Letaief | 2009 | World Journal of Gastroenterology2009，15，22： | 2 |
| 4 | A receive space diversity architecture for OFDM systems using orthogonal designs 显示文摘 | Huang D F Letaief B K Lu J H | 2004 | IEEE Transactions on Wireless Communications2004，3，3： | 1 |
| 5 | Single-earrier frequency-do-main equalization with noise prediction for MIMO systems 显示文摘 | Yu Zhu Letaief K B | 2007 | IEEE Transactions on Communications2007，55，5： | 1 |
| 6 | Network coding for efficient multicast routing in wireless ad - hoc networks显示文摘 | ZHANG J FAN P LETAIEF K | 2008 | IEEE Trans Commun2008，56，4： | 1 |
| 7 | Full-rate distributed space-Time codes forcooperative communications显示文摘 | Zhang W Letaief K B | 2008 | IEEE Transactions on WirelessCommunications(S1536-1276)2008，7，7： | 1 |
| 8 | Low-complexity channel estimator based on windowed DFT and scalar Wiener filter for OFDM system显示文摘 | YANG B CAO Z G LETAIEF K B | 2001 | IEEE International Conference on Communication2001，6，： | 1 |
| 9 | Cooperative spectrum sensing with transmit and relay diversity in cognitive radio networks显示文摘 | ZHANG W LETAIEF K B | 2008 | IEEE Transactions on Wireless Communications2008，7，12： | 1 |
| 10 | Data Transmission Using OFDM in Multipath Fading Channels Based on Parametric Channel Modeling显示文摘 | YANG Baoguo LETAIEF K B | 2001 | IEEE Trans Commun2001，49，： | 1 |
| 11 | Timing recovery for OFDM Transmission显示文摘 | Letaief K B Roger S | 2000 | IEEE Journal on Selected Areas in Communications2000，18，22： | 1 |
| 12 | An interference cancellation scheme for carrier frequency offsets correction in OFDMA systems显示文摘 | HUANG D LETAIEF K B | 2005 | IEEE Transactions on Communications2005，53，7： | 1 |
| 13 | A robust timing and frequency synchronization for OFDM systems显示文摘 | H Minn V K Bhargava K Ben Letaief | 2003 | IEEE Trans Wireless Commun2003，2，4： | 1 |
| 14 | Multiuser OFDM with adaptive subcarrier, bit and power allocation 显示文摘 | Wong C Y Cheng R S Letaief K B | 1999 | IEEE J on Select Areas Commun1999，17，10： | 1 |
| 15 | Cooperative communications for cognitive radio networks显示文摘 | LETAIEF K B ZHANG W | 2009 | Proceedings of the IEEE2009，97，5： | 1 |
| 16 | Adaptive Tracking of Optimal Bit and Power Allocation for OFDM Systems in Time-Varing Channels显示文摘 | Lai S K Cheng R S Letaief K B | 1999 | IEEE WINC1999，，2： | 1 |
| 17 | Multiuser OFDM with adaptive subcarrier, bit, and power allocation显示文摘 | WONG C Y CHENG R S LETAIEF K B | 1999 | IEEE J on Select Areas on Comm1999，17，10： | 1 |
| 18 | Muhiuser OFDM with adaptive subcarrier, bit and power allocation显示文摘 | WONG C Y CHENG R S LETAIEF K B | 1999 | IEEE Journal on Selected Areas of Communications1999，17，10： | 1 |
| 19 | Cooperative Spectrum Sensing withTransmit and Relay Diversity in Cognitive Radio Networks显示文摘 | Zhang Wei Letaief K B | 2008 | IEEE Transactions on Wireless Communications2008，7，12： | 1 |
| 20 | A robust timing and frequency synchronization for OFDM systems 显示文摘 | MINN H BHARGAVA V K LETAIEF K B | 2003 | IEEE Transactions Jul 2003 Volume 22003，4，： | 1 |
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