共查询到20条相似文献，搜索用时 156 毫秒
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讨论了k步广义马氏过程及其时间不变性和平稳性，给出了熵率的两种定义，说明了其等价性，还给出了平稳的广义马氏链熵率的计算公式． 相似文献
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对于已有的含有确定时滞的Logistic单种群模型,添加捕获努力量函数和收获的单位生物量的价格常数P,建立具有价格变化的因素后得到的价格成本变化模型,应用Routh-Hurwei引理讨论价格常数的变化对生物种群的影响,获得价格模型的生物学意义以及在保证生态系统持续存在中价格所起的重要作用。 相似文献
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田应福 《黔东南民族师专学报》2006,24(6):1-3
广义线性模型广泛用于建立非正态响应变量的模型，但它的计算依赖于计算机和数学软件．本文研究Marlab统计工具箱GLM模块的应用，给出广义线性模型的Matlab的算法，并用实例时常用的Logistic和Poisson回归给出了算法． 相似文献
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讨论了捕获量是关于种群数量的线性函数时一类广义Logistic 种群的生存状况,得到了种群弱持续生存和灭绝的充分条件. 相似文献
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研究了双模光场与级联三能级原子相互作用过程中原子粒子布居相干捕获条件，讨论了虚光子过程对粒子布居相干捕获的影响，这种影响导致了系统的量子噪声。 相似文献
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关于互惠系统的捕获优化问题 总被引：1，自引：0，他引：1
对两种群互惠系统的捕获问题进行了全面的研究，先将模型一般化，并对其进行定性分析，讨论了其生态学意义，对于最优捕获策略问题做了更实际的改进，得到了较好的结果。 相似文献
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在此对两个食饵和一个捕食者的三种群收获模型进行定性分析，讨论正平衡点的局部稳定性和全局稳定性，并利用最优控制理论讨论了最优捕获策略． 相似文献
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基于大流量小数据包网络环境下的捕包技术研究 总被引：1，自引：0，他引：1
分析了高速网络环境下PC＋NIC架构在Linux系统下数据包捕获机制，讨论了在大流量小数据包网络环境下产生大量丢包的原因，研究了在Linux平台下，通过综合应用地址映射、“零拷贝”、NAPI机制等多种技术对数据包捕获引擎进行改进，搭建了相应的实验平台并进行相关的性能比较测试。测试表明，改进后的捕包平台能较大幅度提高大流量小数据包网络环境下数据包捕获效率。 相似文献
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扩频通信技术与常规的通信技术相比，具有低截获率，强抗噪声，抗干扰性，具有信息隐蔽和多址通信等特点。直接序列扩频系统的同步包括伪随机码同步和载波同步，在伪随机码同步过程中，捕获是整个同步过程中最困难的．尤其是在低信噪比条件下的长码快速捕获。 相似文献
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Cawthon SW 《American annals of the deaf》2004,149(4):314-323
The No Child Left Behind Act of 2001 (NCLB) emphasizes educational accountability for all students. Twenty-eight states have policies to aggregate student participation and proficiency data for schools for the deaf in NCLB reports. The remaining states account for these students in other ways: referring student data to "sending" schools and aggregating data to the district or state level are most prominent. In reports of student assessment results for academic year 2002-2003, three schools for the deaf made "Adequate Yearly Progress" under NCLB: These schools demonstrated at least a 95% participation rate in assessments, and at least 95% of their students met or surpassed state proficiency benchmarks in reading and mathematics. Proficiency levels for other schools varied by report, but were often comparable to those of students with disabilities. Challenges and strategies for capturing the impact of NCLB accountability policies on deaf students are discussed. 相似文献
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郭新爱 《新疆职业大学学报》2006,14(4):93-95
本文所谈的语篇教学是从篇章的主题入手,一层一层向下分析实现主题的途径。在阅读课教学中,引导学生通过捕捉表层形式衔接的线索来寻找篇章深层的意义连贯,从而对语篇的深层内涵作出正确无误的理解和判断,可以培养学生的分析、推理能力,能帮助学生更全面、更深刻地理解文章内容,加快阅读速度,培养阅读理解能力,提高阅读水平。 相似文献
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文章主要阐述了基于人体运动相似性的仿人机器人动作规划系统的基本组成。首先,定义了异构形态下的相似性运动特点;其次,以卡耐基梅隆大学和哈尔滨工业大学的人体运动捕获系统为例,分析了人体运动捕获系统的特点;再次,分析了仿人机器人运动稳定性ZMP（Zero moment point）约束;最后阐述了仿人机器人实验平台。 相似文献
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初伟芳 《楚雄师范学院学报》2011,26(3):99-103
文章分析了网络化、数字化环境中欠发达地区地方院校大学生信息获取能力的现状,就如何培养欠发达地区地方院校大学生的信息获取能力,从高校和图书馆的重视、科学的信息素质教育、有效的技能辅导和良好的师资力量四个方面进行探讨,提出了具体的培养策略,以期提高欠发达地区图书馆信息服务质量。 相似文献
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提出了一种以 FA RIMA( p,d,q)模型为基础 ,对 MPEG VBR业务在综合业务网络传输的带宽进行动态分配的新方法 .FARIMA( p,d,q)模型既可描述业务的长相关特性 ,又可描述业务的短相关特性 ,以其为基础的业务预测较准确 .文中对建模和预报方法进行了简化 ,并通过仿真进行了验证 .结果表明本方法可减少对缓冲区的需求 ,并减少了丢包率 相似文献
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采用GS2217单片数字立体声调频收音芯片与微控制器MSP430F149,并结合实时时钟、LCD显示、环境温度采集技术,实现多功能数字调频收音机.详细阐述了系统设计原理与软硬件的实现方法.该收音机具有自动搜台、频段存储、频率显示、静音、立体声输出与环境温度实时采集、显示等功能. 相似文献
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《Performance Improvement》2017,56(6):28-36
Baby Boomers are retiring in large numbers, leaving a shortage of highly knowledgeable employees currently in the U.S. workforce. The time for capturing critical knowledge and ensuring effective knowledge transfer, retention, and implementation to the Millennial generation is now. Through a systematic evidence‐based review, the major finding was that a primary factor of consideration is the selection of a multigenerational knowledge management design team that fosters generational socialization by following a conceptual model for capturing institutional knowledge. 相似文献
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Lectures continue to be the dominant form of university teaching, and lecture capture technologies are tentatively taken up to support this form of delivery, rather than being used as a viable alternative. Much of the previous research, however, has been self-reports or survey-based, with far less attention given to qualitative explorations. This study aims to bridge this gap by using qualitative methods in order to examine students’ experiences of lecture capture provisions within the context of their own learning by utilising six focus groups to generate data. Thematic analysis was used to understand group opinions and experiences of lecture capture within university teaching. Two conceptual themes emerged: enhancing the learning environment and working and learning strategically. Results show that the value of lecture capture provisions could not be fully evaluated by students without considering their current learning environments. The main positive function of lecture capturing was to alleviate negative perceptions of lectures as a learning event, but it also provided students an opportunity to learn strategically. The extent to which lecture capturing develops and enhances the learning experience is discussed. Recommendations for how universities could utilise lecture capturing are proposed. 相似文献
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During the complex teaching act, there are moments that require teachers to engage in reflection to make critical decisions about how to respond to particular problems in practice. The present investigation provides a stimulus for capturing these reflections as four elementary practicing teachers are asked to describe their “bumpy moments” in teaching. Analysis of the 19 “bumpy moments” identified offers insights into the thoughts, knowledge, and beliefs that these teachers are considering during their practice. Results have implications for capturing reflection during teaching, ongoing practicing teacher professional development, and preservice teacher education. 相似文献