基于贝叶斯分类的农作物产品质量挖掘研究

采用贝叶斯算法的基本原理,并结合农作物生长环境数据的特点,分析和预测了农作物的产品质量.采用随机选取的样本组进行试验预测,预测准确率高,表明该算法是有效的.     

H.264中基于边缘方向检测的帧内预测模式选择算法

运动估计是H.264中最为复杂的部分,帧内预测是运动估计的重要内容.H.264中帧内预测模式众多,大大增加了编码的复杂度.在帧内预测中,一般是通过率失真优化或者相关特性来减少选择预测模式,但复杂度还是较高.针对此问题,提出了一种改进的基于边缘方向检测的帧内预测模式选择算法.该算法利用方向检测方法来检测模式选择方向上像素的相关性.测试结果显示,本算法在保证视频质量的前提下减小了计算复杂度,大大提高了编码速度.     

一种基于神经网络的快速预测控制算法

由于普通广义预测控制在快速性方面存在局限性,本文提出一种基于BP神经网络的(GPC)算法,该算法用训练好的BP去解决GPC算法中的丢潘图方程求解、大矩阵的求解、求逆等复杂运算.本文将该法用于冷连轧机快速系统中进行仿真,结果表明,该算法比普通的GPC算法速度提高了很多,具有很好的控制性能.     

应用情景检测的安全任务内电压调度算法

针对移动嵌入式实时系统的低功耗设计,提出一种改进的应用情景检测的安全任务内电压调度算法.该算法利用任务程序少数参数的值域定义情景并在任务处理过程中进行检测,因而在处理在线的情况下,可较为精确地预测后续处理的部分路径,优化地调度处理电压.通过所提出的情景检测点设置算法,在任务程序中找到检测参数情景最合适的点,给出算法的实现方法.通过仿真实验证明该算法能有效地降低任务处理能耗.     

基于时滞递推滑模预测解耦的带钢板形板厚控制

针对多变量耦合系统,提出了一种基于解耦的时滞递推滑模预测控制的算法。该算法是在对角解耦的基础上,将预测算法和递推滑模控制结合起来,设计了递推滑模预测控制器。还对滑模参考轨迹进行了研究和分类,阐述了两种滑模参考轨迹的区别。该算法被应用在带钢板形板厚的控制过程中,试验和仿真结果表明,该方法可较好地消除带钢板形板厚控制中耦合与时滞的影响。     

基于图像分区的大容量预测编码信息隐藏算法

基于预测编码的思想,提出了一种无损的信息隐藏算法,即通过将载体图像分为秘密信息嵌入区和非嵌入区分别进行编码,克服了解码过程中可能出现的误差扩散,使得算法在提取秘密信息的同时能完全恢复原始载体图像.通过在不同大小的载体图像上进行实验可知,该算法达到了0.953 bit/byte的大信息隐藏容量以及49.184dB的信噪比,证实该算法的有效性.     

基于MICE_RF的组合赋权—极限随机树岩爆预测模型

目前岩爆预测的真实训练数据量小、数据存在缺失,为了更加准确地预测岩爆等级,提出了一种基于链式随机森林多重插补（MICE_RF）算法的组合赋权—极限随机树（ET）预测模型。首先,在选取岩爆灾害主要评判指标的基础上,采用MICE_RF算法插补缺失数据;然后,由改进层次分析法（IAHP）和基于指标相关性的权重确定方法（CRITIC）确定指标主、客观权重,并引入权向量距离概念对指标组合赋权;最后,将插补和赋权后数据集采用ET算法,构建岩爆等级预测模型。利用国内外工程实例数据进行20次随机抽样试验,并与其他模型进行对比分析。结果表明：MICE_RF插补后可显著提高岩爆模型预测效果;改进AHP-CRITIC法较改进前更具优势,该模型平均预测准确率为93.10%,各比较指标结果均优于对比模型,预测结果更稳定。     

基于高相关滤波算法的PSO-LSTM连铸坯质量预测模型

文章提出了一种将高相关滤波算法与粒子群优化长短期记忆神经网络相结合的连铸坯质量预测模型.首先,使用高相关滤波算法对影响连铸坯质量的多种因素进行降维处理,然后,利用粒子群优化长短期记忆神经网络进行连铸坯中心偏析陷等级的预测实验.实验结果验证了该模型在预测性能方面的优势.     

一种新型的预测功能控制算法

预测功能控制(Predietive Functional Control,PFC)算法是模型预测控制(Model Predictive Control,MPC)算法中的一种.它适合用来控制快速过程,并能使它快速无延迟地到达目标或设定点.本文将PFC算法扩展应用到线性离散系统差分方程模型,文中将详细介绍这种新型的PFC算法,即线性差分方程预测功能控制LDE-PFC(Linear Difference E-quation,PFC)算法.LDE-PFC算法主要由四部分组成线性差分方程,输出预测,参考轨迹和控制作用计算.基于预测控制目标函数,LDE-PFC算法就是要让预测输出尽可能接近参考轨迹,同时能尽量快速平滑地到达设定点.为了证明LDE-PFC算法的有效性,在Matlab/Simulink平台上研究和仿真了LDE-PFC算法在离散系统中的应用.仿真结果表明,LDE-PFC算法能快速无延迟地跟踪不同类型的快速变化的设定点.     

宝钢混铁车保温改造效果评估算法

混铁车保温改造效果评估是混铁车保温改造过程中的重要环节之一.本文在大量实验的基础上,建立了混铁车运输过程及处理过程中铁水温降的半经验简化算法.经实验验证,该算法得出的混铁车改造前、后的铁水温降与实测值吻合,相对误差在0.7%以内.并用该算法对混铁车的保温效果进行了评估,得出改造后铁水温降可缓解20 ℃以上.该算法对采用其它改进措施的铁水温降的预测也具有参考价值.     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)