外辐射源雷达多径杂波抑制的快速横向滤波算法

外辐射源雷达面临严重的多径杂波问题,传统的递归最小二乘(Recursive LeastSquare,RLS)算法能有效地抑制多径杂波,相对最小均方(Least Mean Square,LMS)算法而言,该算法收敛速率快,且不随输入相关矩阵特征值的扩散而改变,能获得更好的杂波抑制效果,但该算法复杂度高,不利于实时处理.针对此问题,提出了一种外辐射源雷达多径杂波抑制的快速横向滤波算法,该算法的计算量与LMS相当,同时具有RLS的优越性,对多径杂波抑制的实时处理更具有吸引力.仿真和实测数据处理结果验证了该算法的有效性.     

江苏弘宇原始口粮B2C网店网络营销策略研究

网络营销是电商发展和保持生命力的核心,原始口粮B2C网店以淘宝天猫为平台,销售绿色有机食品,倡导膳食养生的企业核心理念。从网站定位、网络营销环境、网络营销策略三个方面剖析网店的生存现状,并对原始口粮网店进行SWOT分析,找出网店目前存在的问题,提出有针对性的改善建议。     

驼铃摇醒柴达木

1953年冬天．大雪笼罩八百里秦川。西安劳动路石油地质局礼堂坐满了人：“他们刚刚完成从新疆、陕北、甘肃、青海东部．宁夏等地区采集来的石油勘探原始资料的总结．     

Recursive least square vehicle mass estimation based on acceleration partition

Vehicle mass is an important parameter in vehicle dynamics control systems. Although many algorithms have been developed for the estimation of mass, none of them have yet taken into account the different types of resistance that occur under different conditions. This paper proposes a vehicle mass estimator. The estimator incorporates road gradient information in the longitudinal accelerometer signal, and it removes the road grade from the longitudinal dynamics of the vehicle. Then, two different recursive least square method （RLSM） schemes are proposed to estimate the driving resistance and the mass independently based on the acceleration partition under different conditions. A 6 DOF dynamic model of four In-wheel Motor Vehicle is built to assist in the design of the algorithm and in the setting of the parameters. The acceleration limits are determined to not only reduce the estimated error but also ensure enough data for the resistance estimation and mass estimation in some critical situations. The modification of the algorithm is also discussed to improve the result of the mass estimation. Experiment data on asphalt road, plastic runway, and gravel road and on sloping roads are used to validate the estimation algorithm. The adaptability of the algorithm is improved by using data collected under several critical operating conditions. The experimental results show the error of the estimation process to be within 2.6%, which indicates that the algorithm can estimate mass with great accuracy regardless of the road surface and gradient changes and that it may be valuable in engineering applications. This paper proposes a recursive least square vehicle mass estimation method based on acceleration partition.     

海胆炒饭

正海胆对我来说是一种相当陌生的食材,平时少有见识。它呈球形或半球形,浑身长满刺,可谓荆棘遍体,于是,好多人称它为"海中刺猬"。这种古怪的长相已足够让人敬而远之,更遑论去品尝它的美味了。初次接触海胆,是近年在香港西贡海鲜街见到有店家推出一种"二人套餐",价格颇大众化,包括粉丝扇贝、清蒸鲍鱼、清蒸海斑、芝士龙虾伊面,还有海胆炒饭。这不禁让人有了几分猎奇的冲动,顺便试一试这款炒饭会是何等风味。     

看得到的

除去繁华的外衣，留下最原始的形态。生命的流动在眼皮下鲜明的跳动，就像音符，弹奏着优美的韵律，清新、自然、透明     

边防体系中的古代邮驿——鸡鸣驿城

驿城是军事观察哨、堡寨、城市与驿站的混合体，其形制从侧面证明了军驿是邮驿的来源之一。驿城的模式既延续了邮驿体系的原始特征，又在原基础上附加了更多属性以满足复合型的时代需要。从历史上看，中国版图上、尤其是边疆地区，从不缺少此类具有复合功能的城市聚落：从世界范围看，在城市职能未明确分工前，邮驿、军事也是多数城市所隐含的职能。但鸡呜驿城却能在众多城市聚落中脱颖而出，     

践行语用理念,夯实语文素养

2011版《语文课程标准》提出:语文课程是一门学习语言文字运用的综合性、实践性课程。这一句话铿锵有力地道出语文教学的出发点和落脚点。教师应多注重学生的语言训练,从质疑、感知、模仿的维度,真正将语用教学落在实处。本文提出要聚焦语言特色,借助品味解析践行语用理念;尊重原始认知,借助答疑解惑践行语用理念;凸显范例价值,借助积极模仿践行语用理念,真正促进学生的核心素养不断发展。     

手机游戏月荐

逆天劫；七龙珠-终极原始大乱斗；魔兽-豪华攻防战；     

传承与超越(上)——中西方原始生态文明观的差异及对现代生态城的启示

生态城市作为一种全新的城市发展模式,怎样从人类历史的长河中汲取营养,汲取原始生态文明的精华,同时利用现代创新技术使其再生复兴,从而创建富有中国特色和竞争力的生态城市发展新模式。住房和城乡建设部副部长仇保兴博士的研究成果作出了回答。作者从中西方原始文明的比较,到现代生态城的发展,宏篇阔论,鞭辟入里。本刊分两期发表,希望读者垂注。