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Search Results: 1 - 10 of 14211 matches for " 熊恺 "
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立式冲击破碎机锤头材料和质量的研究
银金光,, 显文
金属矿山 , 2009,
Abstract: 常用立式冲击破碎机合金锤头质量差,使用寿命短,消耗量大,影响了设备的运转作业率。对锤头材料和质量进行了研究,在锤头材料方面,选择高铬合金作为锤头的材料,经热处理后,其抗磨性能高、韧性好、使用寿命长,是一种较为理想的锤头材料;在锤头质量方面,根据锤头动力学分析和破碎的能量条件,导出了锤头质量的计算公式,为锤头质量的确定提供了理论依据。
基于视觉注意模型的苗期油菜田间杂草检测
Detecting weed in seedling rapeseed oil field based on visual-attention model

吴兰兰,,利荣
- , 2018,
Abstract: 提出了基于视觉注意模型的苗期油菜/杂草图像检测方法。针对苗期油菜大田环境,获取油菜/杂草RGB原始图像。根据原始图像颜色分布特点改进Itti模型,生成系列特征显著图,结合区域生长算法分割出感兴趣区域。针对该区域提取形状和纹理特征参数作为支持向量机输入量,判别出所有油菜区域,最后融合原始图像和油菜区域获取最终株间杂草区域。结果表明:与局部迭代阈值法和最大类间方差法相比,本研究提出的图像分割方法更优,正确分割目标概率、错误分割目标概率及漏分割目标概率分别为92.46%、3.26%及7.54%;针对形状、纹理、综合特征及精选特征四类特征参数集,径向基-支持向量机的识别率分别为96.00%、94.29%、100.00%及96.00%。
A new rapeseed oil seedling/weed detection method based on visual-attention model was put forward.The RGB images for the rapeseed oil seedling and weed in the seedling rapeseed oil field were obtained.Series of feature saliency using an improved Itti model in terms of the distribution characteristics of the original images were mapped.The ROI using region growing method were extracted.We calculated the shape and texture feature parameters of the regions segmented before and put them as the input of SVM used to identify seedling rapeseed oil regions.The weed regions were obtained by combining the original images with the seedling rape regions using a logical operation.The results showed that the correct segmentation rate,false segmentation rate and error segmentation rate of the proposed method was 92.46%,3.26% and 7.54%,respectively.It is indicated that the proposed method is better than the other two image segmentation methods.Using shape,texture,comprehensive and specifically selected feature parameters as the input,the classification rate of RBF-SVM was 96.00%,94.29%,100.00% and 96.00%,respectively.
基于游客认知的历史地段城市记忆研究——以北京南锣鼓巷历史地段为例
汪芳,严琳,,吴必虎
地理学报 , 2012, DOI: 10.11821/xb201204010
Abstract: 城市记忆是城市特色形成的重要源泉,而历史地段则盛载着与城市的前世今生所相关的城市记忆.因而,探讨人们对历史地段城市记忆的认知规律,将为有效保存城市记忆、有机更新历史地段提供重要思路.本文选取北京南锣鼓巷历史地段作为研究对象,归纳游客对城市记忆的认知变量,构建了由信息和载体2个一级变量衍生而得的20个二级变量、89个三级变量组成的城市记忆认知测量的指标体系,通过问卷对历史地段城市记忆的游客认知进行调查.基于调查数据统计,采用序次Logistic回归模型,分析影响游客城市记忆认知水平的相关因素,构建城市记忆认知程度公式,归纳游客认知规律,以便为历史地段和城市旅游的规划、管理提供参考.
基于internet/intranet集约化奶牛场精细养殖技术平台的构建
熊本海,吕健强,罗清尧,
牲畜兽医学报 , 2005,
Abstract: ?在windows2000advancedserver环境上,利用sqlserver2000网络数据库系统,通过将集约化奶牛场生产管理过程基本要素数字化并建成奶牛场精细养殖数据库体系框架后,结合了b/s与c/s两种结构的优点,构建了基于internet/intranet集约化奶牛场精细养殖技术平台。按预设的奶牛生命周期各种基本参数,利用技术平台自动产生的模拟数据,全面验证了平台开发的预期目标,即建成的平台系统能按奶牛个体跟踪至少5代以上的祖先系谱,能监测可能出现的子代近交系数,能动态反映由不同类型牛只组成的牛群结构,尤其在采集奶牛个体体况信息的基础上,根据系统设置预测养分需要的模型,精准计算个体奶牛的日营养需要并优化日粮配方,基本实现了以个体信息为基础的奶牛精细饲养。最后指出该技术平台的发展方向是建立以构件技术为基础的三层体系结构,为webserver应用提供更大的空间。
经颈静脉肝内门体分流术在肝癌伴门脉癌栓中的临床应用
谢正元,,郭武华
- , 2016, DOI: 10.13609/j.cnki.1000-0313.2016.11.015
Abstract: 【摘要】目的:回顾分析并探讨经颈静脉肝内门体分流术(TIPS)在原发性肝癌伴门静脉癌栓(PVTT)治疗中的应用价值。方法:回顾分析原发性肝癌伴门静脉癌栓,并接受TIPS手术治疗的患者的病例资料,了解术后主要症状改善情况,并发症及生存期等随访资料。结果:接受TIPS手术的肝癌伴PVTT患者共13例,其中成功进行手术患者10例。3例上消化道出血患者成功止血,7例腹水患者中的5例腹水减少,手术成功患者的平均生存期为(112.1±41.7)天,而未获成功的平均生存期仅(34.3±25.5)天,差异具有统计学意义(P<0.05)。结论:TIPS应用于肝癌伴门脉癌栓的治疗可行,可改善生存质量、延长生存期,具有一定的临床应用价值
基于deform的正挤结合侧挤大变形工艺研究
石凤健,王卫玲,,肖汉青,李文进
江苏科技大学学报(自然科学版) , 2013,
Abstract: ??等径角挤压被认为是最具工业化应用前景的大塑性变形技术之一,但其局限限制了其工业化应用。本文在常规等径角挤压技术的基础上提出了一种正挤压结合侧向挤压新工艺,采用deform-2d软件对该新工艺进行了数值模拟。结果表明,这种新型工艺具有单道次变形量大且均匀的特点,为高效地制备大尺度块体超细晶材料提供了新途径。但挤压时所需载荷也较大。所以,应通过进一步的工艺参数优化,为模具设计和选材提供保障。
自我肯定需求假设的认知综合性
The Syntextuality of the Hypothesis of Self-Assertiveness Demand
 [PDF]

, 蔡恒进
Emergence and Transfer of Wealth (ETW) , 2013, DOI: 10.12677/ETW.2013.31001
Abstract:
本文通过回顾经济学发展史,指出经济理论在各个历史时期的认知局限性。基于“理性人”假设建立起的凯恩斯主义供需模型和国家干预机制未能重视经济个体源于肯定自我的正当需求,使国家干预在财富调控中效率低下;基于主观方法论的奥地利学派强调了人在交换理论框架下获得自我满足感的合理性,但基于先验论的奥地利学派未能给出指导财富分配的工具。自我肯定需求,来自主观的判断,并形成于认知范围内受客观条件制约的动态比较之中。自我肯定需求理论从认知的角度出发,阐释了财富的涌现与流转规律,建议构造财富再分配的高效信息工具,将为经济理论的发展提供新的方向。
The cognitive limitations are presented by reviewing the development of economic theories. The Keynesian mechanism of government intervention, which is based on the hypothesis of rational man, ignores individual economic demand on self-affirmation, leading to the failure in efficiency and justice in wealth dis- tribution and transfer. Austrian School, on the basis of subjective methodology, emphasizes the rationality of self-satisfaction under exchange activities, does not provide any instruments on wealth redistribution. Self- assertiveness demands describe the demands originated from human cognitive tendency to confirm self-values. It is a dynamic process originated between subjective and objective estimate of outside world. The self-as- sertiveness demand derived theories have offered explanations of the emergence and transfer of wealth, and proposed an efficient monetary instrument to realize wealth redistribution based on information technology, which could bringing about a new direction of the development of economic theories.
21世纪初期韩台经济发展分化原因分析
The Bifurcation of Economic Developments in South Korea and Taiwan in the Early Twenty-First Century
 [PDF]

, 蔡恒进
Emergence and Transfer of Wealth (ETW) , 2013, DOI: 10.12677/ETW.2013.34009
Abstract:
韩国与台湾是典型的发展型国家(地区),二者具有相似的经济和社会发展历史背景,但在实现了高速增长阶段后最终分化,走上了不同的发展道路,并在21世纪初期前者持续增长而后者停滞不前。本文在自我肯定需求理论的框架内,应用“认知膜”和“自我肯定需求”解释韩台经济发展背后的根本原因,指出实现经济可持续增长的途径在于政府是否能够在认知膜的框架下满足国民自我肯定需求、驾驭国家(地区)经济,实现经济生态系统的平衡与进化发展。
South Korea maintained optimistic economic momentum whileTaiwanbore stagnation in the early twenty-first century. The analysis applies concepts of self-assertiveness demands and cognitive membrane to revealing the bifurcation of the two developmental states (regions) which had similar paths in economy and social development, and indicates that sustainable economic growth relies on the balanced and dynamic evolution processes coordinated by government under cognitive membranes.
人民币国际化进程的战略分析
A Strategic Analysis of RMB’s Internationalization
 [PDF]

, 蔡恒进
Emergence and Transfer of Wealth (ETW) , 2014, DOI: 10.12677/ETW.2014.44008
Abstract:
人民币国际化是中国成长为世界大国的必由之路。法郎国际化失败的重要原因是综合国力不能与国际化进程相匹配。征战欧洲、争夺海上霸权的进程反而加速了法国国际地位的丧失和法郎的衰败。日元国际化的代价是资产泡沫化后长达20年的经济衰退。其原因是货币国际化进程中政治、经济自主权的缺失,以及资本市场的过度开放。本文分析了法郎和日元国际化进程中的问题,并引入自我肯定需求理论,认为在美元仍将主导国际货币体系数年中,管理好大国成长预期,在次要国际货币地位上,务实地调整国民经济、发展国内金融市场、寻求国际认可,来韬养国民自我肯定需求,是人民币国际化的战略核心。
The process of RMB internationalization is a growing need of the rise of China. The disreputable past of FRF and its fail of becoming an internationalized currency caused by expeditionary wars of France imply that the internationalization process of a currency must keep in pace of the growth of a nation. The Yen emerged as an international currency in the 1990s, but it came at painful cost of real estate bubble and subsequent recession in Japan. We review the history and apply the self- assertiveness demand theory to claim the risk of over accelerated internationalization process of currencies and offer a strategy of RMB’s internationalization.
基于EDA-GA的置换流水车间调度算法
A Hybrid EDA with GA for the Permutation Flow Shop Scheduling Problem
 [PDF]

刘祝智,
Operations Research and Fuzziology (ORF) , 2015, DOI: 10.12677/ORF.2015.51002
Abstract:
置换流水车间调度问题是工业工程中经典的组合优化问题,一般采用智能优化算法来求解该问题。作为一种新颖的优化算法,分布估计算法主要使用统计学习的方法指导搜索过程。然而,这种算法容易陷入到局部最优而出现过早收敛的现象。本文将分布估计算法与遗传算法结合,通过模糊逻辑控制来调节两种算法生成个体的比例。该算法有利于保持种群的多样性,避免了过早收敛。以Car类和Rec类算例进行测试,实验结果证实了本文所提出的混合算法的有效性。
The permutation flow shop scheduling problem is a classical combinatorial optimization in indus-trial engineering. Population-based evolutionary algorithms (EA) are the common methods to solve this problem. As a novel EA, estimation of distribution algorithm (EDA) directs the algorithm search towards good solutions by statistical learning. However, this algorithm may trap into the local optimal and lead to the premature convergence. To overcome the drawback of EDA, this paper incorporates EDA with GA to address the PFSP. The participation rates of EDA and GA are adaptively regulated by fuzzy logic controller. The experiment results on the benchmarks validate the efficiency of the proposed algorithm.
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