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Effect of URM infills on seismic vulnerability of Indian code designed RC frame buildings 认领 引用
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作者 Putul Haldar Yogendra Singh D.K.Paul 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2012年第2期233-241,共9页
Unreinforced Masonry (URM) is the most common partitioning material in framed buildings in India and many other countries. Although it is well-known that under lateral loading the behavior and modes of failure of the ... Unreinforced Masonry (URM) is the most common partitioning material in framed buildings in India and many other countries. Although it is well-known that under lateral loading the behavior and modes of failure of the frame buildings change significantly due to infill-frame interaction, the general design practice is to treat infills as nonstructural elements and their stiffness, strength and interaction with the frame is often ignored, primarily because of difficulties in simulation and lack of modeling guidelines in design codes. The Indian Standard, like many other national codes, does not provide explicit insight into the anticipated performance and associated vulnerability of infilled frames. This paper presents an analytical study on the seismic performance and fragility analysis of Indian code-designed RC frame buildings with and without URM infills. Infills are modeled as diagonal struts as per ASCE 41 guidelines and various modes of failure are considered. HAZUS methodology along with nonlinear static analysis is used to compare the seismic vulnerability of bare and infilled frames. The comparative study suggests that URM infills result in a significant increase in the seismic vulnerability of RC frames and their effect needs to be properly incorporated in design codes. 展开更多
关键词 URM infill RC frame building Indian seismic design code seismic performance seismic vulnerability
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DAYU3D:a modern code for HTGR thermal-hydraulic design and accident analysis 认领 引用
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作者 Hao-Jie Zhang Yu-Tong Wen +2 位作者 Ding She Yan-Hua Zheng Lei Shi 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2026年第5期345-360,共16页
DAYU3D is a modern three-dimensional(3D)computer code for thermal-hydraulic design and accident analysis in hightemperature gas-cooled reactors(HTGRs),developed by the Institute of Nuclear and New Energy Technology(IN... DAYU3D is a modern three-dimensional(3D)computer code for thermal-hydraulic design and accident analysis in hightemperature gas-cooled reactors(HTGRs),developed by the Institute of Nuclear and New Energy Technology(INET)at Tsinghua University.Compared to the traditional codes like TINTE,the DAYU3D code has advantages due to its refined framework,improved models,and more efficient algorithms.It is able to simulate the continuous movement of control rods and is more rigorous in treating radiation heat transfer and the break mass flow.Advanced computational methods significantly improve the computational efficiency of DAYU3D,achieving a time reduction of over 60%compared to TINTE.Extensive verification and validation with more than 100 cases demonstrate that DAYU3D is promising for HTGR 3D thermal-hydraulic design and accident analyses. 展开更多
关键词 High-temperature gas-cooled reactor Thermal-hydraulic design and accident analysis code Three-dimensional DAYU3D
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Code for Design of Railway Freight Car Facilities 认领 引用
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作者 无 《铁道技术标准（中英文）》 2026年第7期86-112,共27页
TB 10031-2021 J 73-2021 Prepared by:China Railway SIYUAN Survey and Design Group Co.,Ltd.Approved by:National Railway Administration Effective date:February 1,2022 China Railway Publishing House Co.,Ltd.Beijing 2022 N... TB 10031-2021 J 73-2021 Prepared by:China Railway SIYUAN Survey and Design Group Co.,Ltd.Approved by:National Railway Administration Effective date:February 1,2022 China Railway Publishing House Co.,Ltd.Beijing 2022 Notice of National Railway Administration on the Issue of Railway Industry Standards(Engineering and Construction Standard Batch No.6,2021)Document GTKF[2021]No.34 Code for Design of Railway Freight Car Facilities(TB 10031-2021)is hereby issued and will come into effect on February 1,2022.Code for Design of Railway Freight Car Facilities(TB 10031-2009)is withdrawn.China Railway Publishing House Co.,Ltd.is authorized to publish this Code. 展开更多
关键词 Railway Freight Car Facilities Design Code TB Engineering Construction Standard China Railway Publishing House Co Ltd railway industry standards engineering National Railway Administration China Railway Siyuan Survey Design Group Co Ltd
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Neural Codes Constructs Based on Combinatorial Design 认领 引用
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作者 Jin Huang 《Applied Mathematics》 2025年第1期42-60,共19页
Neuroscience (also known as neurobiology) is a science that studies the structure, function, development, pharmacology and pathology of the nervous system. In recent years, C. Cotardo has introduced coding theory into... Neuroscience (also known as neurobiology) is a science that studies the structure, function, development, pharmacology and pathology of the nervous system. In recent years, C. Cotardo has introduced coding theory into neuroscience, proposing the concept of combinatorial neural codes. And it was further studied in depth using algebraic methods by C. Curto. In this paper, we construct a class of combinatorial neural codes with special properties based on classical combinatorial structures such as orthogonal Latin rectangle, disjoint Steiner systems, groupable designs and transversal designs. These neural codes have significant weight distribution properties and large minimum distances, and are thus valuable for potential applications in information representation and neuroscience. This study provides new ideas for the construction method and property analysis of combinatorial neural codes, and enriches the study of algebraic coding theory. 展开更多
关键词 Combinatorial Neural Codes Orthogonal Latin Rectangle Steiner System Group Divisible Design Transversal Design
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A comparative study of pseudo-static slope stability analysis using different design codes 认领 引用 被引量：4
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作者 Xin-guang Yang En-di Zhai +1 位作者 Yuan Wang Zhong-bo Hu 《Water Science and Engineering》 EI CAS CSCD 2018年第4期310-317,共8页
Many researchers have developed new calculation methods to analyze seismic slope stability problems, but the conventional pseudo-static method is still widely used in engineering design due to its simplicity. Based on... Many researchers have developed new calculation methods to analyze seismic slope stability problems, but the conventional pseudo-static method is still widely used in engineering design due to its simplicity. Based on the Technical Code for Building Slope Engineering（GB 50330-2013） of China and the Guidelines for Evaluating and Mitigating Seismic Hazards in California（SP117）, a comparative study on the pseudo-static method was performed. The results indicate that the largest difference between these two design codes lies in determination of the seismic equivalence reduction factor( f;). The GB 50330-2013 code specifies a single value for f;of 0.25. In SP117, numerous factors,such as magnitude and distance, are considered in determining f;. Two case studies show that the types of slope stability status evaluated by SP117 are in agreement with those evaluated by the seismic time-history stability analysis and Newmark displacement analysis. The factors of safety evaluated by SP117 can be used in practice for safe design. However, the factors of safety evaluated by GB 50330-2013 are risky for slope seismic design. 展开更多
关键词 Earthquake Slope stability Pseudo-static method Design code
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Seismic fragility assessment of RC frame structure designed according to modern Chinese code for seismic design of buildings 认领 引用 被引量：12
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作者 D. Wu S. Tesfamariam +1 位作者 S.F. Stiemer D. Qin 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2012年第3期331-342,共12页
Following several damaging earthquakes in China, research has been devoted to find the causes of the collapse of reinforced concrete （RC） building sand studying the vulnerability of existing buildings. The Chinese C... Following several damaging earthquakes in China, research has been devoted to find the causes of the collapse of reinforced concrete （RC） building sand studying the vulnerability of existing buildings. The Chinese Code for Seismic Design of Buildings （CCSDB） has evolved over time, however, there is still reported earthquake induced damage of newly designed RC buildings. Thus, to investigate modern Chinese seismic design code, three low-, mid- and high-rise RC frames were designed according to the 2010 CCSDB and the corresponding vulnerability curves were derived by computing a probabilistic seismic demand model （PSDM）.The PSDM was computed by carrying out nonlinear time history analysis using thirty ground motions obtained from the Pacific Earthquake Engineering Research Center. Finally, the PSDM was used to generate fragility curves for immediate occupancy, significant damage, and collapse prevention damage levels. Results of the vulnerability assessment indicate that the seismic demands on the three different frames designed according to the 2010 CCSDB meet the seismic requirements and are almost in the same safety level. 展开更多
关键词 building damage criteria collapse ratio probabilistic seismic demand model （PSDM） fragility curves Chinese Code for Seismic Design of Buildings （CCSDB）
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Seismic resilience assessment of corroded reinforced concrete structures designed to the Chinese codes 认领 引用 被引量：12
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作者 Yu Xiaohui Dai Kuangyu +1 位作者 Li Yushi Li Bing 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2021年第2期303-316,共14页
The natural landscape in China exposes many existing RC buildings to aggressive environments.Such exposure can lead to deterioration in structural performance with regard to resisting events such as earthquakes.Corros... The natural landscape in China exposes many existing RC buildings to aggressive environments.Such exposure can lead to deterioration in structural performance with regard to resisting events such as earthquakes.Corrosion of embedded reinforcement is one of the most common mechanisms by which such structural degradation occurs.There has been increasing attention in recent years toward seismic resilience in communities and their constituent construction;however,to date,studies have neglected the effect of natural aging.This study aims to examine the effect of reinforcement corrosion on the seismic resilience of RC frames that are designed according to Chinese seismic design codes.A total of twenty RC frames are used to represent design and construction that is typical of coastal China,with consideration given to various seismic fortification levels and elevation arrangements.Seismic fragility relationships are developed for case frames under varying levels of reinforcement corrosion,i.e.,corrosion rates are increased from 5%to 15%.Subsequently,the seismic resilience levels of uncorroded and corroded RC frames are compared using a normalized loss factor.It was found that the loss of resilience of the corroded frames is greater than that of their uncorroded counterparts.At the Rare Earthquake hazard level,the corrosioninduced increase in loss of resilience can be more than 200%,showing the significant effect of reinforcement corrosion on structural resilience under the influence of earthquakes. 展开更多
关键词 seismic resilience seismic fragility corrosion Chinese seismic design codes RC frames
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Code Design and Shuffled Iterative Decoding of a Quasi-Cyclic LDPC Coded OFDM System 认领 引用
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作者 刘斌彬 白栋 +1 位作者 葛启宏 梅顺良 《Tsinghua Science and Technology》 EI CAS 2009年第1期106-112,共7页
In multipath environments, the error rate performance of orthogonal frequency division multiplexing （OFDM） is severely degraded by the deep fading subcarriers. Powerful error-correcting codes must be used with OFDM.... In multipath environments, the error rate performance of orthogonal frequency division multiplexing （OFDM） is severely degraded by the deep fading subcarriers. Powerful error-correcting codes must be used with OFDM. This paper presents a quasi-cyclic low-density parity-check （LDPC） coded OFDM system, in which the redundant bits of each codeword are mapped to a higher-order modulation constellation. The op- timal degree distribution was calculated using density evolution. The corresponding quasi-cyclic LDPC code was then constructed using circulant permutation matrices. Group shuffled message passing scheduling was used in the iterative decoding. Simulation results show that the system achieves better error rate performance and faster decoding convergence than conventional approaches on both additive white Gaussian noise （AWGN） and Rayleigh fading channels. 展开更多
关键词 quasi-cyclic low-density parity-check （LDPC） codes code design iterative decoding degree distribution density evolution
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Construction of Minimum Bandwidth Regenerating Codes with Combinatorial Design 认领 引用 被引量：1
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作者 CAI Feng GUO Wangmei 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2016年第3期229-234,共6页
We study the construction of minimum bandwidth regenerating code with combinatorial design. At first, a method of constructing minimum storage regenerating （MBR） codes is presented, which can tolerate only one-node ... We study the construction of minimum bandwidth regenerating code with combinatorial design. At first, a method of constructing minimum storage regenerating （MBR） codes is presented, which can tolerate only one-node failure. Then, we give examples to explain the code. Finally, we discuss the case of repairing multiple nodes, and analyze the performance with an example. 展开更多
关键词 distributed storage system minimum bandwidth regenerating codes combinatorial design network coding
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Figma2Code:面向Figma设计稿的自动代码生成方法 认领 引用 被引量：3
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作者 朱琳 封颖超杰 +8 位作者 朱航 王斯加 朱闽峰 喻晨昊 张钰荟 许达兴 赵德明 冯玉君 陈为 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2025年第2期321-329,共9页
设计类创作工具已被广泛用于提高用户界面的设计效率,然而,根据设计稿开发代码是一件耗时费力的工作.针对现有的设计稿自动转代码的方案面临的代码可用性和复现结果准确性等问题,基于Figma设计工具提出一种自动代码生成方法——Figma2Co... 设计类创作工具已被广泛用于提高用户界面的设计效率,然而,根据设计稿开发代码是一件耗时费力的工作.针对现有的设计稿自动转代码的方案面临的代码可用性和复现结果准确性等问题,基于Figma设计工具提出一种自动代码生成方法——Figma2Code.首先,通过节点和图层优化提高设计稿元数据质量;其次,采用元数据标注信息的语义理解和图像识别技术识别组件;然后构建一套通用型的中间态数据结构,表示优化后的元数据和识别后的组件属性,以支持多种代码语言的生成;最后,基于模板生成可用代码,并通过函数抽取和元素循环输出提高代码可用性.采用生成代码的复现样式准确度量化评估和基于专家经验的代码可用性定性评估,证明了所提方法的有效性. 展开更多
关键词 设计稿转代码 逆向工程 用户界面 深度学习
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Revision of seismic design codes corresponding to building damagesin the“5.12”Wenchuan earthquake 认领 引用 被引量：5
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作者 Wang Yayong 《Earthquake Engineering and Engineering Vibration》 SCIE EI 2010年第2期147-155,共9页
A large number of buildings were seriously damaged or collapsed in the"5.12"Wenchuan earthquake.Based on field surveys and studies of damage to different types of buildings,seismic design codes have been upd... A large number of buildings were seriously damaged or collapsed in the"5.12"Wenchuan earthquake.Based on field surveys and studies of damage to different types of buildings,seismic design codes have been updated.This paper briefly summarizes some of the major revisions that have been incorporated into the"Standard for classification of seismic protection of building constructions GB50223-2008"and"Code for Seismic Design of Buildings GB50011-2001."The definition of seismic fortification class for buildings has been revisited,and as a result,the seismic classifications for schools,hospitals and other buildings that hold large populations such as evacuation shelters and information centers have been upgraded in the GB50223-2008 Code.The main aspects of the revised GB50011-2001 code include:(a)modification of the seismic intensity specified for the Provinces of Sichuan,Shanxi and Gansu;(b)basic conceptual design for retaining walls and building foundations in mountainous areas;(c)regularity of building configuration;(d)integration of masonry structures and precast RC floors;(e)requirements for calculating and detailing stair shafts;and(f)limiting the use of single-bay RC frame structures.Some significant examples of damage in the epicenter areas are provided as a reference in the discussion on the consequences of collapse,the importance of duplicate structural systems,and the integration of RC and masonry structures. 展开更多
关键词 Wenchuan earthquake earthquake damage to buildings revision of seismic design codes
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Half Rate Quasi Cyclic Low Density Parity Check Codes Based on Combinatorial Designs 认领 引用 被引量：2
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作者 Sina Vafi Narges Rezvani Majid 《Journal of Computer and Communications》 2016年第12期39-49,共11页
This paper presents new half rate Quasi Cyclic Low Density Parity Check (QC- LDPC) codes formed on the basis of combinatorial designs. In these codes, circulant matrices of the parity check matrix are formed on the ba... This paper presents new half rate Quasi Cyclic Low Density Parity Check (QC- LDPC) codes formed on the basis of combinatorial designs. In these codes, circulant matrices of the parity check matrix are formed on the basis of subsets in which the difference between any two elements of a subset is unique with all differences obtained from the same or different subsets. This structure of circulant matrices guarantees non-existence of cycle-4 in the Tanner graph of QC-LDPC codes. First, an irregular code with girth 6 constituted by two rows of circulant matrices is proposed. Then, more criteria will be considered on the structure of subsets with the mentioned feature aiming to represent a new scheme of regular QC-LPDC codes with girth at least 8. From simulations, it is confirmed that codes have similar to or better performance than other well-known half rate codes, while require lower complexity in their design. 展开更多
关键词 Quasi-Cyclic LDPC Codes Combinatorial Designs Circulant Matrix
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Secret Sharing Schemes Based on the Dual Code of the Code of a Symmetric (v, k, λ)-Design and Minimal Access Sets 认领 引用
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作者 Selda Calkavur 《Computer Technology and Application》 2015年第2期95-100,共6页
Secret sharing has been a subject of study for over 30 years. The coding theory has been an important role in the constructing of the secret sharing schemes. It is known that every linear code can be used to construct... Secret sharing has been a subject of study for over 30 years. The coding theory has been an important role in the constructing of the secret sharing schemes. It is known that every linear code can be used to construct the secret sharing schemes. Since the code of a symmetric （V, k, λ）-design is a linear code, this study is about the secret sharing schemes based on C of Fp-code C of asymmetric （v, k, λ）-design. 展开更多
关键词 Linear code the code of a symmetric design secret sharing scheme minimal access set.
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Analysis of Key Issues in Design Codes for Long-Span Highway Bridges 认领 引用
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作者 Meng Wan 《Journal of Architectural Research and Development》 2020年第2期20-22,共3页
In recent years,with the continuous expansion of China's infrastructure construction,related construction work,including highway and bridge construction,has been steadily progressing.Among them,bridges are an impo... In recent years,with the continuous expansion of China's infrastructure construction,related construction work,including highway and bridge construction,has been steadily progressing.Among them,bridges are an important component of infrastructure construction,and their safety and stability are related to the travel of the masses and even the safety of their lives.China has a strict management system for bridge design specifications.This article mainly takes long-span highway bridges as an example to study the key issues of its design specifications and proposes countermeasures for related work. 展开更多
关键词 Long-span highway bridge Design code Key issues Response
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A Brief Overview of Chinese Technical Code for Designing Fossil Fuel Power Plants 认领 引用
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《Electricity》 1997年第4期10-12,共3页
关键词 A Brief Overview of Chinese Technical Code for Designing Fossil Fuel Power Plants
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“人工智能+教育”行动新赛道:教学设计驱动式AI编程 认领 引用 被引量：1
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作者 黎加厚 《课程·教材·教法》 CSSCI 北大核心 2026年第5期30-37,共8页
AI编程又称氛围编程,是一种利用人工智能将自然语言转化为计算机代码的新兴软件开发技术。AI编程在教学中的应用将会推动教师教学方式、学生学习方式、教材建设和教学资源、课堂结构和氛围的系统性变革,这是“人工智能+教育”行动的一... AI编程又称氛围编程,是一种利用人工智能将自然语言转化为计算机代码的新兴软件开发技术。AI编程在教学中的应用将会推动教师教学方式、学生学习方式、教材建设和教学资源、课堂结构和氛围的系统性变革,这是“人工智能+教育”行动的一个新赛道。进一步提升教师使用AI编程的技能,需要掌握教学设计驱动式AI编程,这是指教师以系统化教学设计为先导,通过结构化提示语驱动AI生成可执行代码,从而实现更符合预期的AI编程效果。教学设计驱动式AI编程包括教学问题诊断、确定解决方案、编写提示语、AI辅助开发、教学应用评价五个环节。研究提供AI编程在教学中应用的四类典型应用场景与实践案例——整合优质资源、转化静态文本教材、中小学科学教育、支持项目化学习和教育科研,以供读者参考。 展开更多
关键词 “人工智能十教育” 氛围编程 AI编程 教学设计驱动式AI编程
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梁端注浆加固PC空心板梁的抗剪性能 认领 引用
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作者 辛崇升 卢悄悄 +2 位作者 赵鹍鹏 荣殊 王辰 《山东交通学院学报》 CAS 2026年第3期70-76,共7页
为解决旧规设计的预应力混凝土(prestressed concrete,PC)空心板梁在现行车道荷载作用下因抗剪能力不足导致端部腹板出现大量裂缝病害问题,采用梁端注浆加固技术,对不同注浆长度的试验梁L1、L2、L3(注浆长度分别为0、50、70 cm)开展加... 为解决旧规设计的预应力混凝土(prestressed concrete,PC)空心板梁在现行车道荷载作用下因抗剪能力不足导致端部腹板出现大量裂缝病害问题,采用梁端注浆加固技术,对不同注浆长度的试验梁L1、L2、L3(注浆长度分别为0、50、70 cm)开展加载试验,分析集中荷载作用下试验梁的挠度变化、应变分布、裂缝发展规律及最终破坏形态等,评估梁端注浆法的抗剪加固效果。研究结果表明:加固后试验梁L2、L3的开裂荷载比L1分别增大35.2%、40.5%,跨中挠度分别减小15.0%、24.0%,主拉应变分别减小32.0%、40.5%,梁端注浆加固法明显提高旧规设计PC空心板梁的抗剪性能,既有裂缝得到有效抑制。为完善梁端注浆加固抗剪承载力计算公式,基于试验数据,引入注浆加固长度影响系数,较好地反映注浆加固长度对试验梁坑剪承载力的影响。 展开更多
关键词 PC空心板梁 旧规范设计 梁端注浆加固 抗剪加固
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基于相位编码CP-OFDM正交波形的SAR抗干扰研究 认领 引用
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作者 史海旭 刘天趣 +4 位作者 徐仲秋 李光祚 林宽 梁伟 洪文 《信号处理》 CSCD 北大核心 2026年第2期208-220,共13页
随着数字化技术和雷达系统的发展,针对合成孔径雷达(Synthetic Aperture Radar,SAR)的干扰对抗技术不断进步,尤其是基于数字射频存储技术(Digital Radio Frequency Memory,DRFM)产生的有源欺骗干扰为SAR成像系统带来了前所未有的考验。... 随着数字化技术和雷达系统的发展,针对合成孔径雷达(Synthetic Aperture Radar,SAR)的干扰对抗技术不断进步,尤其是基于数字射频存储技术(Digital Radio Frequency Memory,DRFM)产生的有源欺骗干扰为SAR成像系统带来了前所未有的考验。针对欺骗干扰开展SAR成像抗干扰方法研究,本文基于相位编码波形与带有循环前缀的正交频分复用(Cyclic Prefix Orthogonal Frequency Division Multiplexing,CP-OFDM)波形进行正交波形设计,提出了相位编码CP-OFDM正交波形。基于CP-OFDM波形的循环前缀(Cyclic Prefix,CP)特征,引入基于线性模型的脉冲压缩方法对相位编码CP-OFDM正交波形的SAR成像回波进行距离向处理,能够实现无旁瓣干扰的自相关脉冲压缩。通过对相位编码CP-OFDM波形的时域相位进行编码优化设计,可以实现不同相位编码CP-OFDM波形之间良好的互相关性能。基于线性模型脉冲压缩方法改善了一种p范数多波形加权循环(p-norm Weighted Cyclic Algorithm,p-WeCAN)波形优化算法,采用该算法对相位编码CP-OFDM波形集的相位编码序列进行优化设计,优化后波形的互相关脉冲压缩结果的峰值水平(Peak Sidelobe Level,PSL)相比于随机相位编码CP-OFDM波形的互相关PSL改善了2 dB左右。CP特性赋予了相位编码CP-OFDM波形良好的自相关脉冲压缩结果,相位编码优化设计提供了良好的互相关脉冲压缩结果,采用该正交波形集进行SAR成像,能够实现对欺骗干扰的抑制。进行了点目标、面目标和基于GF-3回波数据反演的半实测数据的抗欺骗干扰SAR成像仿真,与基于线性调频(Linear Frequency Modulation,LFM)波形的欺骗干扰条件下的成像结果进行对比,验证了相位编码CP-OFDM对欺骗干扰的抑制能力。 展开更多
关键词 SAR抗干扰 CP-OFDM 相位编码 正交波形设计 p-WeCAN优化
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灵巧调制互补编码的探干一体化波形设计 认领 引用
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作者 郭永刚 王志川 +2 位作者 陆星宇 杨建超 顾红 《现代雷达》 CSCD 北大核心 2026年第1期68-76,共9页
探测干扰一体化波形设计,一般是基于共享波形的理念,利用无典型雷达信号特征的干扰信号进行探测。现有研究设计的波形可设计自由度低、探测结果旁瓣水平高,综合性能较差。文中提出了一种基于灵巧调制互补编码的探测干扰一体化波形。传... 探测干扰一体化波形设计,一般是基于共享波形的理念,利用无典型雷达信号特征的干扰信号进行探测。现有研究设计的波形可设计自由度低、探测结果旁瓣水平高,综合性能较差。文中提出了一种基于灵巧调制互补编码的探测干扰一体化波形。传统基于灵巧调制的探测干扰一体化波形二相编码序列的夹角可调,干扰效果可控。然而该灵巧调制波形存在探测旁瓣高的问题,从互补编码的角度出发,文中设计了一种具有互补特点的灵巧调制波形,该波形可通过脉冲间相加合成一个完整的线性调频信号,降低了灵巧调制波形的探测旁瓣,提升了灵巧调制波形的探测性能。理论分析表明,通过调整编码序列的相位夹角可灵活调控该一体化波形的探测和干扰效果。通过仿真分析和实测证实了该波形具有显著优势。 展开更多
关键词 雷达探测干扰一体化 波形设计 相位编码序列 互补编码
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A NOVEL VARIABLE-LENGTH CODE FOR ROBUST VIDEO CODING 认领 引用
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作者 Ma Linhua Chang Yilin 《Journal of Electronics(China)》 2006年第4期623-626,共4页
A novel Variable-Length Code (VLC), called Alternate VLC (AVLC), is proposed in this letter, which employs two types of VLC to encode source symbols alternately. Its advantage is that it can not only stop the symbol e... A novel Variable-Length Code (VLC), called Alternate VLC (AVLC), is proposed in this letter, which employs two types of VLC to encode source symbols alternately. Its advantage is that it can not only stop the symbol error propagation effect, but also correct symbol insertion errors and avoid symbol deletion er-rors, so the original sequence number of symbols can be kept correctly, which is very important in video com-munication. 展开更多
关键词 Code design Error correction Symbol synchronization Variable-Length Code （VLC）
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