福建龙海某高速公路隧道地质灾害发生机理分析与处理研究

通过对福建龙海某高速公路地质灾害的描述,结合地质构造,分析地质灾害发生的机理并对断层破碎带区域的隧道施工处理进行研究。     

煤炭行业的发展及其润滑油市场的开发

通过对国内煤炭行业基本状况、未来发展趋势和润滑油脂应用现状的分析,就如何运用现代营销手段与服务方式来开发维护煤炭行业这一巨大润滑油市场进行了讨论,认为润滑油行业应帮助煤炭行业建立完善的润滑管理体系,并与煤炭行业强技术领域合作,共同开发新产品及推进用油国产化。下游产品开发是煤炭行业今后重要的利润增长点,近期发展迅速,润滑油行业应密切关注其相关产业链设备的引进情况,及时提供所需润滑油品。     

Assessing the Impact of Changing Economic Environment on Productivity Growth: The Case of the Spanish Dairy Processing Industry

This article analyzes the productivity growth of the Spanish dairy processing industry from 1996 till 2011, which concerns the period of increased EU regulation regarding food safety as well as economic crisis. Data envelopment analysis is used to compute the Malmquist index and its components. The results suggest that productivity on average declined during the period under investigation. The decomposition of the Malmquist index finds that technical regress contributed to productivity decline despite improvements in technical and scale efficiencies. Our results also suggest that food safety regulations did not have a negative impact on productivity growth. Technical change and scale efficiency change made significant negative contributions to productivity growth in the period under crisis, whereas firms significantly improved their technical efficiency in that period.     

User-generated product reviews on the internet: the drivers and outcomes of the perceived usefulness of product reviews

This study examines how people cope with the user-generated product reviews (UGPRs) found on various websites where anonymous web users post and share their personal product usage experiences. Based on information processing model of communication, we postulate that there are source, message, media, and receiver factors to influence individuals' psychological processing of the UGPR messages, and its subsequent behavioral outcomes. A survey was administered by a professional market research firm to 262 randomly selected US residents from 18 to 55 years old. Consistent with the predictions, the results of the structural equation modeling analysis showed that the perceived source expertise, message objectivity, website credibility, and receiver–source similarity had positive and direct impacts on the perceptions of UGPR usefulness, which, in turn, positively influenced individuals' willingness to share product reviews with others. A series of causal model invariance tests also confirmed that the findings were statistically invariant across different subgroups divided by such factors as product categories, websites, subjective product class knowledge, past UGPR experience, and the susceptibility to informational influence.     

生物工程技术在食品工业领域中的应用

生物工程技术作为21世纪的高新技术,在各个领域都能发挥出极关键作用.随着新技术的发展,生物工程技术在食品工业领域中更是绽放出了夺目的光彩.在本文中,笔者针对生物工程技术在食品资源开发、食品加工、食品资源安全检测、传统食品改良等方面的应用做出阐述,希望能为相关从业者提供新的工作思路.     

基于区域可达性定量模型的新疆出口加工贸易基地选择研究

在加工贸易区或加工贸易基地选择研究方面,学界主要集中在基于因子分析方法的投资环境视角的研究上。文章采用另一种方法——区域可达性定量模型,对新疆主要中心城市和口岸城市的区域可达性进行计算,并按区域可达性大小排序。在国家实施东部地区产业转移的政策环境下,文章结合新疆特色加工产业群,对新疆加工贸易的发展和区域空间结构布局调整做了初步思考。     

我国国际收支双顺差态势的路径选择

从当代经济全球化与国际分工深化角度的研究表明,产品内分工、加工贸易的蓬勃发展是我国持续国际收支双顺差及外汇储备激增的根源。持续双顺差的格局可能给我国经济运行带来一些问题。应从以下方面作出政策调整:转变外贸政策;增加政府及公共支出,使国内储蓄顺利转化为国内投资;不断完善外汇储备制度,成立专门外汇投资公司。     

基于CenterNet的跑步姿态鉴别系统的设计

为了改善目前大众跑步姿势普遍不规范的现状,提出了一种基于CenterNet的跑步姿态鉴别系统。首先,通过截图、拍照的方式自制数据集,并对数据集进行清洗、标注和分析,消除数据无关信息与简化数据。其次,引入多尺度通道注意力机制与添加十字星变形卷积2种方式改进CenterNet算法模型,将动作图像转化为数字信息和特征向量,并以此为基础,利用KNN（K-nearest neighbors）算法对跑步姿态类型进行分类。最后,与经典模型方案进行对比,验证改进CenterNet算法鉴别系统的有效性。结果表明：改进的CenterNet模型的精确率与召回率都有所提升,其参数量与计算量降低。所提算法模型能够对大多数不良姿势作出及时、准确反馈,有效帮助跑步爱好者发现问题,从而改善跑步姿态、提高运动效率、预防伤病。     

基于YOLOv3的H型钢表面缺陷检测系统

为了提升H型钢的表面质量和安全系数,设计了一种基于YOLOv3算法的型钢表面缺陷检测系统.设计的检测系统由硬件系统和软件系统组成:硬件系统包括八角架式图像采集装置、电动控制系统和通信系统;软件系统采用YOLOv3目标检测算法.现场测试结果表明:1)检测系统可实时采集图像,并根据H型钢的规格型号能够自动调节图像采集装置结...     

基于HHT及主成分分析的光缆识别信号特征提取

为了解决当环境噪声较严重时光强难以维持稳定,容易误判目标光缆问题,根据干涉信号非线性、非平稳的时域特征,提出了一种希尔伯特-黄变换及主成分分析相结合的信号处理方法。探测器接收的干涉信号对进行经验模态分解,把分解得到的本征模态分量作为列向量构建主成分分析的样本矩阵,以奇异值的贡献率进行有效成分筛选;然后采用主成分分析算法完成降噪优化。最后将降噪后的信号进行希尔伯特-黄变换得到瞬时特征信号,完成目标光缆识别。结果表明,相同噪声环境下所提方法可有效提高回波干涉信号的信噪比。因此,研究结果可以降低误判目标光缆的概率,帮助工程人员更有效地完成光缆识别。