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计算机工程 2002年第1期28卷 80-82页

作者：郭淑明何红永郭云飞国家数字交换系统工程技术研究中心郑州450002

介绍了信道化码(Channelization Code)及其重要作用,分析了它在W-CDMA(Wideband CDMA)系统FDD(Frequency Division Duplex)方式下的分配规则及策略;提出了一种实用的实际算法。

关键词：第三代移动通信信道化码码分配规则算法宽带码分多址 WCDMA-FDD

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一种非视距环境下的椭圆-角度混合定位技术

系统仿真学报 2009年第11期21卷 3332-3336页

作者：程爱华季中恒葛宝忠西南电子电信技术研究所成都610041 国家数字交换系统工程技术研究中心郑州450002

为了研究基于CDMA网络的新型定位系统,提出了称为"椭圆-角度混合定位"的新型定位技术,它利用信号到达时间之和(TSOA)与到达角(AOA)实现目标的定位。在设计的定位系统中,采用有偏卡尔曼滤波器消除TSOA测量值中的非视距(NLOS)误差,同时抛... 详细信息

为了研究基于CDMA网络的新型定位系统,提出了称为"椭圆-角度混合定位"的新型定位技术,它利用信号到达时间之和(TSOA)与到达角(AOA)实现目标的定位。在设计的定位系统中,采用有偏卡尔曼滤波器消除TSOA测量值中的非视距(NLOS)误差,同时抛弃遭受NLOS严重污染的AOA测量值,最后使用扩展卡尔曼滤波器实现多台定位设备的数据融合,实现了对移动台的定位和跟踪,仿真结果显示了定位系统的有效性。

关键词：无线定位卡尔曼滤波器到达时间之和(TSOA) 到达角(AOA) 非视距(NLOS)

Large field of view computed laminography with the asymmetric rotational scanning geometry

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Science China(technological Sciences) 2010年第8期53卷 2261-2271页

作者： FU Jian 1,2.,JIANG BaiHong&LI Bin 1 School of Mechanical engineering and Automation,Beihang University,Beijing 100191,China 2.research {2. of digital Radiation Imaging and Biomedical Imaging,Beihang University,Beijing 100191,China 1. School of Mechanical engineering and Automation Beihang University Beijing 100191 China2. Research Center of Digital Radiation Imaging and Biomedical Imaging Beihang University Beijing 100191 China

X-ray computed laminography(CL)is used in the fields of industrial inspection and medical *** can provide the internal structure three-dimensional(3D)information of a region of the objects *** is important to the clinical diagnosis and the quality control of flat objects like printed circuit boards,aircraft wings and satellite solar *** the restriction that the imaging region must be within the X-ray beam formed by the X-ray source and the detector,the imaging field of view of CL is limited by the size of detector.A new CL method with an asymmetric rotational cone-beam scanning geometry,called large field of view CL,is presented to overcome the existing *** can extend the imaging region when the imaging spatial resolution keeps the same as that of the conventional *** can also improve the imaging spatial resolution when the imaging region keeps the same as that of the conventional *** asymmetric configuration can be achieved by offsetting the detector from the conventional symmetric *** does not,however,require new detectors and X-ray source nor alter the scanning mechanical *** filtered back-projection(FBP)reconstruction algorithm and the data truncation smoothing functions have been deduced to reconstruct the images directly from the data acquired with this asymmetric *** performed numerical studies and experiments to demonstrate and validate the proposed approach. Results in these studies and experiments confirm that the proposed method can enlarge the imaging region and improve the spatial *** proposed approach may find applications in the CL system with the rotational scanning geometry.

关键词： computed laminography image reconstruction reconstruction algorithm imaging field of view imaging spatial resolution

A new method of estimating the equivalent elastic modulus of RCCD

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Science China(technological Sciences) 2007年第z1期50卷 136-143页

作者： GU ChongShi1,2., WU Yuan1, SU HuaiZhi1,2.& TANG LiHui1 1 College of Water Conservancy and Hydropower engineering, Hohai University, Nanjing 2.0098, China 2.national engineering research center of Water Resources Efficient Utilization and engineering Safety, Nanjing 2.0098, China College of Water Conservancy and Hydropower engineering Hohai University Nanjing 210098 China national engineering {2. center of Water Resources Efficient Utilization and engineering Safety Nanjing 210098 China

Based on the composite material mechanic theory, the analysis method for the equivalent elastic moduli which are parallel and vertical to the construction interface of RCCD is studied in this paper. The differences between the equivalent elastic moduli which are vertical to the construction interface of RCCD gotten from different methods are discussed in detail. The variation range of the equivalent elastic modulus which is vertical to the construction interface of RCCD is studied based on the principle of minimum complementary energy and the principle of minimum potential energy. The effect of the related influential factors on the equivalent elastic modulus is analyzed. The estimation formula of the equivalent modulus which is vertical to the construction interface of RCCD is proposed. The feasibility of the approach proposed in this paper is analyzed through an example.

关键词： RCCD equivalent elastic modulus variation range estimation method

DESIGN AND EVALUATION OF A PIPELINED FORWARDING ENGINE

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Journal of Electronics(China) 2007年第2期24卷 157-162页

作者： Li Yufeng Chen Yue Lan Julong national digital {2. system engineering ＆ technological R ＆D center Zhengzhou 450002 China

Recent advances in broadband technology have caused forwarding engines to handle pack- ets with over 10 gigabit per second. In this paper, we present a high-speed forwarding pipeline which can finish all of the routing and forwarding tasks in the way of pipelining. We also establish the analysis model of the pipeline with which one can evaluate some key performance parameters of the forwarding engine such as forwarding rate and forwarding delay. We find that the pipeline is of good scalability and can forward unicast packets up to the speed of 40Gbit/s.

关键词： Design Forwarding engine Pipeline Evaluate

A NEW DECODER OF SYNCHRONOUS OPTICAL CODE DIVISION MULTIPLE ACCESS systemS USING SEGMENTED CORRELATION

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Journal of Electronics(China) 2001年第2期18卷 135-139页

作者： Li Ou Wu Jiangxing Lan Julong(national digital {2. system engineering & Technology research center, Zhengzhou 450002. national digital {2. system engineering & Technology research center Zhengzhou 450002

A new segmented correlating decoder of synchronous optical CDMA using modified prime sequence codes is proposed. The performance of the proposed system is analyzed under the assumption of Poisson shot noise model for the receiver photodetector. The decoder technique is shown to be more effective to improve the bit error probability performance than the method using an optical hard-limiter.

关键词： Synchronous optical CDMA Prime codes Multiple access system Segmented correlation

Establishing time-dependent model of deformation modulus caused by bedrock excavation rebound by inverse analysis method

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Science China(technological Sciences) 2008年第S2期51卷 1-7页

作者： WU ZhongRu1,2.GU YanChang1,3,GU ChongShi1,2.GUO HaiQing1 & SU HuaiZhi1,2.1 Hohai University,Nanjing 2.0098,China 2.national engineering {2. center of Water Resources Efficient Utilization and engineering Safety,Nanjing 2.0098,China 3 Nanjing Hydraulic {2. Institute,Nanjing 2.002.,China 1. Hohai University Nanjing 210098 China 2. national engineering {2. center of Water Resources Efficient Utilization and engineering Safety Nanjing 210098 China 3. Nanjing Hydraulic research Institute Nanjing 210029 China

Rock rebound relaxation deformation,or even rock burst,caused by the excavation of dam base and abutment or high rock slope affects their stability and results in the fall of mechanical properties of the *** an inverse analysis method was proposed in this paper to establish the time-dependent model of deformation modulus caused by excavation *** basic principle is based on the combination of observed data of the excavation rebound deformation of dam abutment or rock slope,and the calculated rebound deformation by FEM under ground stress at the corresponding time in the excavation *** norm of the residuals of observed data and calculated data are taken as the objective ***,the time-dependent model of bedrock deformation modulus can be *** method displays its significance in the design of excavation,construction and operation management of dam base and high slope.

关键词： dam base rebound deformation modulus inverse analysis method time-dependent model Xiaowan Hydropower Station

research on Multiple Pattern Matching Technology Based on TCAM

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Research on Multiple Pattern Matching Technology Based on TC...

A SCHEDULING ALGORITHM USING COMPENSATING ROUND ROBIN IN PACKET-SWTICHING BROADBAND NETWORKS

2.11 IEEE International Conference on Information Theory and Information Security(ICITIS 2.11)

作者： Lei Guo 1) Yadi Wang 1) Qinrang Liu 2. Ke Zhu 2. 1) Zhengzhou Information Science and Technology Institute Zhengzhou China 2. national digital {2. system engineering & technological research center Zhengzhou China

This paper studied on Deep Packet Inspection and the core technology multiple-pattern matching *** the basis of these algorithms,the paper proposed a new multiple-pattern matching algorithm which could accelerate based on *** full advantage of the property of TCAM,the algorithm could achieve better performance,and achieve the demand for line-speed when multiple pattern real time *** the algorithm has lower cost than similar algorithms.

关键词： DPI multiple-pattern matching TCAM

来源： cnki会议评论

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Journal of Electronics(China) 2002年第2期19卷 139-145页

作者： Lan Julong Wang Binqiang Li Ou Wu Jiangxing(national digital {2. system Eng. & technological research center.Zhengzhou 450002. national digital {2. system Eng. & technological research center Zhengzhou 450002

A new approximation of fair queuing called Compensating Hound Robin (CRR) is presented in this paper. The algorithm uses packet-by-packet scheduler with a compensating measure. It achieves good fairness in terms of throughput, requires only O( I) time complexity to process a packet, and is simple enough to be implemented in hardware. After the performances are analyzed, the fairness and packet loss rate of the algorithm are simulated. Simulation results show that the CRR can effectively isolate the effects of contending .sources.

关键词： Broadband networks Round robin Scheduling Bandwidth allocation Queuing

PRCA： A highly efficient computing architecture

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engineering Sciences 2014年第4期12卷 38-47页

作者： Luo Xingguo national digital {2. system engineering & technological R&D center Zhengzhou 450002 China

Applications can only reach 8 %~15 % of utilization on modern computer systems. There are many obstacles to improving system efficiency. The key root is the conflict between the fixed general computer architecture and the variable requirements of applications. Proactive reconfigurable computing architecture(PRCA) is proposed to improve computing efficiency. PRCA dynamically constructs an efficient computing architecture for a specific application via reconfigurable technology by perceiving requirements,workload and utilization of computing resources. Proactive decision support system(PDSS),hybrid reconfigurable computing array(HRCA) and reconfigurable interconnect(RIC) are intensively researched as the key technologies. The principles of PRCA have been verified with four applications on a test bed. It is shown that PRCA is feasible and highly efficient.

关键词： PRCA efficient computing challenges