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Search Results: 1 - 10 of 392977 matches for " 王晓梅 "
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H-矩阵的预条件对角占优性
Preconditioned Diagonally Dominant Properties of H-Matrix
 [PDF]

学忠,
Pure Mathematics (PM) , 2012, DOI: 10.12677/pm.2012.21008
Abstract: 对于线性方程组Ax=b ,当A是严格对角占优矩阵时大部分迭代法都收敛。当A不是对角占优矩阵时,预条件技术常被采用。本文给出了一种选取预条件矩阵P和Q的方法,把一个非对角占优的H-矩阵转化为严格对角占优矩阵。数值例子也说明了该方法的有效性。
It is well-known that most iterative methods converge for linear system whose coefficient matrix A is strictly diagonally dominant. When A is not diagonally dominant, preconditioned techniques can be em- ployed. This paper presents a method to establish appropriate preconditioned matrices P and Q for transfor- ming an H-matrix which is non-diagonally dominant matrix into the diagonally dominant matrix. Numerical examples also show the effectiveness of this method.
基于数据驱动的贵州水资源智能配置研究
Study on Water Resources Intellectual Allocation in Guizhou on Account of Data Drive
 [PDF]

, 廖玉, ,
Modeling and Simulation (MOS) , 2016, DOI: 10.12677/MOS.2016.54015
Abstract: 随着经济的快速发展和人口的急剧增加,水资源危机日益严重。现阶段研究贵州偏远山区水资源的是否能够满足当地人们的需求以及是否合理利用显得尤为重要。本文主要基于数据驱动研究贵州山区水资源,建立最大可支撑人口模型和GM(1,1)灰色预测模型,研究当前贵州省的水资源承载力以及预测未来该地区的水资源承载力,进而得出贵州省的水资源总量相当丰富。丰富的水资源要得以合理优化的配置,进而建立基于AHP的模糊综合评价模型对贵州省水资源智能优化配置做出合理的评价方案。
With the rapid development of the economy and the dramatic growth of population, the intensifying crisis of water resource has raised common concern. In the current stage, it is extremely important to make researches on whether the water resource in Guizhou’s remote mountain areas is capable of satisfying local demands and whether it is rational utilized. This thesis studies the water resource in Guizhou Province mainly on account of data drive; in accordance with the largest supporting population model and GM(1,1) Grey Forecasting Model, it studies the current water resource capacity of Guizhou Province, and predicts the future water resource capacity of the area, thus drawing a conclusion that water resource in Guizhou is of abundant total volume. As for the allocation that optimizes the abundant water resource, however, it is shown in the researches that the water resource in Guizhou Province is of rather low utilization efficiency and poor mobilization capability. On this basis, a fuzzy synthetic evaluation model is set up based on AHP so as to provide a reasonable evaluation plan of intelligently optimized allocation of water resource in Guizhou Province.
颞下颌关节弹响与咀嚼肌功能紊乱相关性研究
Association between Articulation Mandibularis Clicking and Masticatory Muscles Functional Exercise
 [PDF]

, , 杨建军
Hans Journal of Biomedicine (HJBM) , 2016, DOI: 10.12677/HJBM.2016.64005
Abstract:
目的:比较咀嚼肌功能锻炼和超短波理疗治疗颞下颌关节弹响的效果。探讨颞下颌关节弹响发生的可能机制。方法:选择128例弹响患者,随机分为实验组和对照组,每组64例。实验组行咀嚼肌功能锻炼,对照组行超短波理疗,疗程两周,随访3个月。比较两种方法的治疗效果。结果:2周后,实验组的64例患者弹响全部消失,总有效率100%;对照组的64例患者33例弹响消失,20例弹响次数减少,11例弹响次数无改变,总有效率82.81%,两组结果有显著性差异(P < 0.05),3个月后,治疗组随访率95.31%,对照组随访率93.75%,治疗组总有效率100%,对照组总有效率66.67%,两组结果有显著性差异(P < 0.05),3月后对照组治疗总有效率下降(P < 0.05)。结论:咀嚼肌功能锻炼治疗颞下颌关节弹响的效果优于超短波理疗,咀嚼肌功能锻炼治疗颞下颌关节弹响的疗效显著。
Objective: To compare the clinical therapeutic efficacy of masticatory muscles functional exercise and ultra-short wave therapy, and investigate a possible pathological mechanism about articulation mandibularis clicking. Methods: 128 patients with articulation mandibularis clicking were selected and divided into two groups (experimental group and control group) of 64 patients each randomly. Patients in experimental group were taught to do masticatory muscles functional exercise for 2 weeks. Patients in control group were treated with ultra-short wave therapy for 2 weeks and 3-month follow-up. The therapeutic effects of the two methods were compared. Results: After 2 weeks, symptoms of articulation mandibularis clicking disappeared in 64 patients of experimental group and 33 patients of control group; the total effective rate was 100%; 20 patients in control group showed improvement of their symptoms and 11 patients in control showed no improvement. The total effective rate was 82.81%. There were significant differences between the two groups (P < 0.05). After 3 months, the follow-up rate of the treatment group and the control group was 95.31% and 93.75%, respectively; the total effective rate of treatment group and the control group was 100% and 66.67%, respectively. There were significant differences between the two groups (P < 0.05), and we could see lower therapeutic effect in control group after 3 months (P < 0.05). Conclusions: Masticatory muscles functional exercise could cure articulation mandibularis clicking effectively and it’s a more effective way when compared with ultra-short wave therapy.
煤炭企业的安全经济效益分析

煤炭学报 , 2007,
Abstract: 结合煤炭企业实际,以安全减损效益为主对煤矿安全投入的经济效益进行了定性分析,构造了煤矿安全投入效益的数学函数并对其性质作了分析,描绘出了煤矿安全投入效益的理论变化曲线.以河南省煤炭企业为例,选取了吨煤安全投入、事故发生起数和死亡人数等安全指标,运用相关性分析、回归性分析等方法对煤矿安全投入与经济效益的关系作了定量分析.分析表明,煤矿安全投入存在着“最佳安全投入”范围,在该范围内安全投入经济效益是非常明显的.
中西医结合卒中单元治疗脑卒中临床观察

中国中医药信息杂志 , 2012, DOI: 10.3969/j.issn.1005-5304.2012.07.026
Abstract:
会计人才标准变化背景下的培养对策
,
财会月刊 , 2011,
Abstract: 随着社会经济的发展,传统会计人员出现知识平台断层,对传统会计人员进行后续培训既不经济,又难以取得成效。本文主要分析此现状下的会计人才培养对策,并就我国会计教育应如何把握机遇、应对挑战提出了一些个人看法。  【关键词】会计人才更新换代会计人才培养随着社会经济的发展,会计工作的复杂程度越来越高,所以社会对会计人员的素质和能力的要求也越来越高。特别是随着全球经济一体化、社会信息化水平的提高、金融创新加快以及会计准则取代会计制度,使税务会计与财务会计进一步分离,会计人员的工作内容发生了翻天覆地的变化。很多会计人员面对工作的巨大变化,深感力不从心,难以应付。以往用人单位总是要求聘用有实践经验的人,不愿意聘用刚毕业的大学生,近年来这一现象发生了变化,特别是个体企业、私营企业等中小企业的用人态度发生的变化最大。以前他们认为具有实践经验的操作型会计人才经济适用,但现在他们发现操作型会计人才除了记死账外,很难胜任其他会计工作,很多属于会计分内的工作都要请别人来做,因为传统会计人员出现了知识断层,很难通过培训来解决这一问题。会计人员更新换代的时代到来了。
机械专业实践课程教学模式的探索与实践
The Exploration and Practice Based on the Teaching Mode of Mechanical Professional Practice
 [PDF]

杜巧连, ,
Vocational Education (VE) , 2013, DOI: 10.12677/VE.2013.21003
Abstract:

机械专业是一个传统的工科专业,我国从“制造大国”向“制造强国”的转变,对机械人才的培养提出了新的挑战,必须对传统的机械专业在课程教学体系、人才培养模式等进行调整与改革。本文根据独立学院的现状,提出了独立学院机械设计制造及其自动化专业本科应用型人才校企合作培养的思路和措施,结合浙江师范大学行知学院机械设计制造及其自动化专业建设情况,提出了贯穿本科四年教学的层次化、模块化实践教学框架,简单介绍了机械设计制造及其自动化专业实践课程教学的模式以及本科应用型人才培养实施的思路和方案。

 The machinery is a traditional specialty which should reform and adjustment in some respects, such as the course teaching system and personnel training, to adapt to the new challenge on talent cultivation face the changing from “manufacturing” to “manufacturing power” in our country. Based on the status of the Independent Institute, the ideas and measures proposed in this paper are to training application personnel of mechanical by school-enterprise cooperation. The hierarchical and modular framework of practice teaching is also put forward which throughout four-year undergraduate teaching combined with the machinery con- struction of the XingZhi College. Finally the mechanical professional practice teaching modes and the implementation ideas of undergraduate application talents training are simple introduced.


 

利用训练序列的OFDM时频同步算法
,
重庆大学学报 , 2009, DOI: 10.11835/j.issn.1000-582X.2009.08.018
Abstract: 针对正交频分复用(OFDM,OrthogonalFrequencyDivisionMultiplexing)系统中频偏和定时误差对系统性能影响很大,基于对称结构的特殊导频序列和已有的频率同步方法,此文提出了一种改进的时频联合同步算法。该算法利用一个OFDM导频符号可同时实现符号同步和频率同步,因此能提高无线传输的数据传输效率。仿真分析表明,由于时频联合同步算法采用了具有很好相关特性的对称结构的特殊导频序列来实现精确的定时同步,相对S&C算法提高了频偏估计精度。
小城镇开发区土地集约利用评价研究 ———以浙江省慈溪市为例
,
地理科学进展 , 2008,
Abstract: 以浙江省慈溪市小城镇开发区、工业区块土地利用的自身特点和现状数据为基础,建立土地集约利用评价指标体系,采用综合评价法,选择评价模型并确定指标的权重,根据评价标准计算出慈溪市小城镇开发区、工业区块土地集约利用程度。评价结果表明,慈溪市小城镇开发区、工业区块仅1处属于II级土地利用较集约,其余均属于III级土地利用基本集约和IV级土地利用不集约;进一步分析表明,不同级别开发区土地投入强度、利用程度和持续状况差异显著,不同产业类型开发区土地利用效率差异较显著。由此可见,政策因素对小城镇开发区土地集约利用的影响起基础性作用。
A model based on the resource equivalency analysis method to evaluate marine ecological damage by oil spill
基于资源等价分析法的海洋溢油生态损害评估模型及应用

李京,
海洋科学 , 2012,
Abstract: 采用资源等价分析法构建溢油海洋生态损害评估的模型, 重新对2002 年渤海塔斯曼溢油事件的潮间带生物损害进行定量评估, 得出补偿修复工程的规模从而估算出针对潮间带受损资源的赔偿额度。资源等价分析法的研究与应用填补了国内在该类方法研究领域的空白, 进一步完善了中国溢油生态损害评估方面的研究, 为各类溢油损害计算提供参考和补偿依据。
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