Lower bound of average centered L2-discrepancy for U-type designs

Uniform designs are widely used in various scientific investigations and industrial applications. By considering all possible level permutation of the factors, a connection between average centered L₂-discrepancy and generalized wordlength pattern for asymmetrical fractional factorial designs is derived. Moreover, we present new lower bounds to the average centered L₂-discrepancy for symmetrical and asymmetrical U-type designs. For illustration of the theoretical results, the lower bounds for symmetrical and asymmetrical U-type designs are tabulated, and numerical results indicate that our lower bounds behave well and can be recommended for use in practice.     

Perimeter-area ratio effects of urbanization intensity on forest characteristics,landscape patterns and their associations in Harbin City,Northeast China

To maximize the ecological services of urban forests, a better understanding of the effects of urbanization on urban forest characteristics, landscape metrics, and their associations is needed for landscape-related regulations in space-limited green infrastructure of metropolitan regions. In this study, Harbin, a typical fast-growing provincial-capital city in Northeast China, is used as a case study. Based on remote sensing images, field surveys, and correlation and variation partitioning analyses, we conclude that landscape characteristics and forest attributes have large variations among different urbanization intensity (UI) regions. Forest patch density (PD), landscape shape index, woody plants species richness, and the Shannon–Wiener index (H′) increased linearly, while stem section area and tree height decreased linearly with the increasing of UIs. UI had a greater influence on tree size and forest community attributes than the forest landscape pattern. Accordingly, any landscape regulation on forest attributes should be implemented according to UIs. In addition, Euclidean nearest neighbor distance(ENN-MN), mean perimeter-area ratio (PARA-MN), fractal dimension index(FRAC-MN), and PD could probably indicate forest attributes the most, e.g., the increase of PARA-MN may be accompanied with taller trees in low and heavy UI regions, but lower woody plants species evenness in low and medium UI regions. More diversified woody plants species, and afforested areas should be advocated in a low UI region, while in a heavy UI region, the conservation of large trees should be implemented. Our results highlight that the implementation of urban forest management should vary according to different urbanization regions to maximize ecological services.

     

Impact of mindful self-care and perceived stress on the health related quality of life among young-adult students in West Virginia

ABSTRACT

There are substantial gaps in research on Health Related Quality of Life (HRQoL) in students aged 18 and above in West Virginia. The purpose of this study is to explore the associations between mindful self-care, perceived stress, and the HRQoL in this population. We conducted a cross-sectional study between March and April 2017. We included participants who were students, aged 18 years and above, living in West Virginia and were able to answer online questions in English. Data was obtained from an online survey using a structured questionnaire, including the SF12v2®, mindful self-care scale- SHORT, and Perceived Stress Scale (PSS)-10. We applied linear regressions to determine the predictors of HRQoL (physical health and mental health) using SF12v2®. 194 participants met the inclusion criteria of the study. Mindful self-care was negatively associated with perceived stress. Better mindful self-care mediated the relationship between perceived stress and psychological well-being, controlling for gender, age, race, marital status, education level, annual household income, and chronic disease status. Perceived stress and mindful self-care were not related to the physical well-being. Better mindful self-care may safeguard against perceived stress among students aged 18 years and above. Our findings in this study recommend more mindfulness-based interventions targeted to this subpopulation to improve psychological well-being.     

语料库在医学英语词汇教学中的应用

让语料库说话已经成为了语言学界的一个共识,真实的语料结合理性的分析不仅是语言研究也是英语词汇学习的重要 途径。语料库在医学英语词汇教学中有着巨大的潜力,通过语料库检索软件,引导学生对真实自然的语料进行按部就班的分 析、模仿、学习、应用,可以在很大程度上提升医学英语的词汇学习效率。     

外商直接投资对中国高新技术产业国际竞争力的影响

基于国际贸易理论中外商直接投资对一国产业国际竞争立提升的理论,通过协整检验的计量方法具体分析了外商直接投资对中国高新技术产业总体国际竞争力及对中国主要出口的三种高新技术产品的国际竞争力的影响程度。结果表明,外商直接投资对中国计算机技术、通信技术和电子技术等三类高新技术产品出口竞争力有很强的正向作用。因此,继续吸引外商投资,可以较好的提升中国高新技术产业的国际竞争力。     

将审计风险理论引入内部审计实践

审计风险 ,是指会计报表存在重大错报或漏报 ,而注册会计师审计后发表不恰当审计意见的可能性。在审计界审计风险日益得到认识和重视 ,内部审计人员有责任探究审计风险理论 ,充分认识审计风险的概念、特征及其产生的原因 ,探索审计风险的防范措施 ,并将其运用到内部审计实践当中 ,建立控制审计风险体系 ,从而达到规避审计风险 ,提高审计工作质量 ,巩固内审部门地位的目的     

绿色贸易壁垒与我国纺织品出口对策

在纺织品服装领域存在四种绿色贸易壁垒——国际环境管理体系系列标准、生态纺织品认证标准、绿色标志制度、绿色法规，对我国入世后纺织品、服装出口具有重要影响，我国政府和企业应采取的对策是提高环保意识、发展企业的绿色生产、加强环保法规和标准建设、加强绿色纺织品的科研与开展等。     

高校工资管理存在的问题及对策研究

工资管理是高校管理工作中一项很重要的内容。工资不仅关系到每个教职工的切身利益,也关系到高等学校的稳定和发展。通过介绍高等学校工资管理工作的发展历程,分析了高校工资管理中存在的问题,并提出了改革工资管理的思路与对策。     

从张培基散文英译探析哲学阐释学的解释力

从阐释学理论中的"理解的前结构"和"视域融合"角度上看,张培基先生的中国现代散文英译可探析哲学阐释学的解释力。"理解的前结构"主要对张先生选择译介对象产生影响,而"视域融合"主要影响到张先生从词汇、句法和风格三方面对译文进行处理的策略。     

传统文化与越商企业家精神特质——基于与晋商、徽商比较的视角

传统文化是造就企业家精神特质的主要原因之一。在越文化熏陶下的越商,具有冒险、创新,勤俭、敬业,诚信、合作以及家庭、企业相伴等企业家精神特质。把越商企业家精神与我国明清时期盛极一时的晋商、徽商企业家精神进行比较,发现创新、勤俭、诚信等是促使晋商、徽商兴旺的重要原因;而不注重兴办实业进行资本投资以化解风险、官商结合、企业带有浓厚的家族化色彩等是导致晋商、徽商衰落的精神性原因。