Pressure from the lips and the tongue in children with class Ⅲ malocclusion

Objective： To discuss possible relationships between class In malocclusion and perioral forces by measuring the pressure from the lips and the tongue of children with class nI malocclusion. Methods： Thirty-one children with class In malocclusion were investigated and their perioral forces were measured at rest and during swallowing under natural head position by a custom-made miniperioral force computer measuring system. Results： The resting pressures exerted on the labial side and palatine side of the upper lett incisor, as well as the labial side and lingual side of the lower lett incisor, were 0 g/cm^2, 0 g/cm^2, 0.57 g/cm^2 and 0.23 g/cm^2, respectively. Correspondingly, the swallowing forces were 2.87 g/cm^2, 5.97 g/cm^2, 4.09 g/cm^2 and 7.89 g/cm^2, respectively. No statistical difference between muscular pressure and gender existed. During swallowing, the lingual forces were significantly higher than the labial forces （P〈0.01）, however, at rest there was no significantly different force between these two sides. Compared to the normal occlusion patients, children with class Ⅲ malocclusion had lower pedoral forces. The upper labial resting forces （P〈0.01）, the lower labial resting forces （P〈0.05） and all the swallowing pressures from the lips and the tongue （P〈0.01） showed statistical differences between the two different occlusion conditions. Meanwhile, no significant difference was found for the resting pressure from the tongue between class Ⅲ malocclusion and normal occlusion. Conclusion： Patients with class Ⅲ malocclusion have lower perioral forces and this muscle hypofunction may be secondary to the spatial relations of the jaws. The findings support the spatial matrix hypothesis.     

基于Word2vec的图书馆推荐系统多样性问题应用研究

图书馆个性化推荐系统强调推荐的精准性,无法满足读者的多样性需求。本文将深度学习算法引入图书馆推荐系统,探讨推荐多样性的问题。首先,依据历史借阅数据,结合时间序列,形成读者借阅行为的共现矩阵;然后将共现矩阵看作上下文的语境,利用Word2vec的潜在语义分析特性,识别读者可能的兴趣;最后挖掘读者可能的兴趣,并提供多样性的推荐结果。本文选取上海浦东图书馆541万余条借阅数据进行实验,对比关联分析的结果,验证了该方法在推荐多样性方面具有较好的效果。     

关于中职学校民族团结教育实效性研究——以新疆司法警官学校为例

新疆自古就是多宗教、多民族、多文化并存的地区,目前,新疆各中职学校学生民族构成成分较多,民族学生也占有相当的比重。不同民族学生之间在学习、生活中因各自民族文化传统、风俗习惯不同,难免会发生一些误解、矛盾与纠纷。因此,加强民族团结教育,培养具有维护民族团结精神和具有高素质、高技术、高技能的人才就是各中职学校面临的一项主要任务。笔者以新疆司法警官学校为例,深入调研,对我校开展的民族团结教育经验与方法进行归纳与梳理,希望对其他中职学校未来开展民族团结教育提供一些借鉴与参考。     

基于半结构化分割的Web热点数据挖掘算法

随着大数据信息技术的发展,数据在线监测和数据挖掘成为计算机信息领域研究的热点。通过对Web热点数据分割挖掘,提高信息热点追踪和Web数据分类能力。传统算法采用非结构化数据挖掘算法,无法有效对Web热点数据进行准确定位和分层挖掘。提出一种基于半结构化分割的Web热点数据挖掘算法。采用半结构化数据进行特征分割,基于优秀基因位进行差分进化,使寻优曲线不断趋于平缓,在多个节点上并行的运行比较脚本,采用半结构化分割,使得Web热点特征挖掘实现自适应寻优,得到Web热点数据的分配因子,提高了挖掘性能。仿真结果表明,该算法获得了良好的效率和精度,提高了Web热点数据挖掘的自适应寻优能力。     

新产品开发模糊前端的不确定性管理模型

不确定性是新产品开发(NPD)中模糊前端(FFE)阶段最重要、最突出的特征,降低不确定性对NPD成功有重要作用。本文在论述了FFE及其不确定性内涵的基础上,重点对三个经典FFE不确定性模型进行了系统分析,归纳总结经典模型之间内在的逻辑关系。在此基础上探索并提出了基于开放式创新理论的FFE不确定性知识共享模型,对该模型的突出特点、关联因素及其相互关系进行了分析,并进一步结合案例分析对新模型的有效性进行了初步评价,为企业有效应用新模型来降低FFE不确定性、提高NPD绩效提供了新思路。     

我国城乡居民财产性收入的基尼系数分析

改革开放以来,我国经济持续平稳发展,城乡居民的收入水平始终在不断提高。在经济发展的过程中,城乡居民的财富不断积累,使得我国城乡居民的财产性收入不断增加,但是同样导致我国城乡居民财产性收入分配差距日益拉大。本文通过2000—2012年的统计数据,计算我国居民财产性收入的基尼系数,阐述分析了我国城乡居民财产性收入分配差距的现状及原因。     

A food-grade industrial arming yeast expressing β-1,3-1,4-glucanase with enhanced thermal stability

The aim of this work was to construct a novel food-grade industrial arming yeast displaying β-1,3-1,4-glucanase and to evaluate the thermal stability of the glucanase for practical application. For this purpose, a bi-directional vector containing galactokinase (GAL1) and phosphoglycerate kinase 1 (PGK1) promoters in different orientations was constructed. The β-1,3-1,4-glucanase gene from Bacillus subtilis was fused to α-agglutinin and expressed under the control of the GAL1 promoter. α-galactosidase induced by the constitutive PGK1 promoter was used as a food-grade selection marker. The feasibility of the α-galactosidase marker was confirmed by the growth of transformants harboring the constructed vector on a medium containing melibiose as a sole carbon source, and by the clear halo around the transformants in Congo-red plates owing to the expression of β-1,3-1,4-glucanase. The analysis of β-1,3-1,4-glucanase activity in cell pellets and in the supernatant of the recombinant yeast strain revealed that β-1,3-1,4-glucanase was successfully displayed on the cell surface of the yeast. The displayed β-1,3-1,4-glucanase activity in the recombinant yeast cells increased immediately after the addition of galactose and reached 45.1 U/ml after 32-h induction. The thermal stability of β-1,3-1,4-glucanase displayed in the recombinant yeast cells was enhanced compared with the free enzyme. These results suggest that the constructed food-grade yeast has the potential to improve the brewing properties of beer.     

民营企业的创新与可持续发展——浙江闰土的经验

企业可持续发展的核心是创新。创新是企业发展的不竭动力,是保持企业竞争优势的重要因素,唯有不断的创新,企业才能在激烈的市场竞争中站稳、做强,才能保证其效益的持续性,也即企业的可持续发展。创新不仅仅是生产一个新的产品,而更多地体现在企业的生产流程、产品方式、销售方式、治理模式等方面,企业处于不同的生命周期对创新的要求、内容也各不相同。     

新时期高校思想政治课教学与社会互动研究——基于福建省湄洲湾职业技术学院的调查和实践

新时期随着市场经济的深入发展,高校思想政治课教学方式要进一步创新,实现与社会的良性互动就是一个较佳选择.本文试从分析新时期高校思想政治课教学与社会互动的现实困境入手,探讨思想政治课教学与社会互动的时代价值,最后对互动路径进行了科学的分析研究.     

基于激励机栅的高校实验技术队伍建设

本文介绍了我国高校实验室建立有效激励机制的必要性,提出了高校实验技术队伍激励机制及其效益探索的新观点。