Outpatient appointment scheduling problem considering patient selection behavior: data modeling and simulation optimization

Journal of Combinatorial Optimization - In medical outpatient services, due to patients’ imbalanced selection for doctors of different levels and for different visiting periods, inefficiency...     

胶东半岛与辽东半岛现代植被发展趋势研究

通过胶东半岛、辽东半岛及庙岛群岛５２个样地乔木更新层情况的调查,采用主成分分析方法进行样地资料分析,指出现代植被发展趋势的两个阶段：松类—栎类混交林阶段与栎类—松类混交林阶段;生境变化趋势由庙岛群岛的温湿向辽东半岛略暖温和胶东半岛的暖干过渡．     

动力减振器最优参数的非线性回归和若干问题

本文采用最优化方法求得考虑生系统阻尼的动力减振器最优参数集，并对此参数集进行非线性回归，得到了便于动力减振器最优设计的回归曲线族。本文还对现有的主系统无阻尼时动力减振器最优参数公式进行了讨论，指出了这些公式的局限性，并根据本文的结果给出了应用范围更广泛的改进公式。     

曲线箱梁桥实用设计方法的研究

曲线箱梁桥目前还缺乏比较实用的设计方法．本文对曲线箱梁桥的现有设计方法作了研究，并推荐一种实用设计方法：采用空间梁单元，每个节点取六个自由度；等效梁格的模拟考虑了横向梁格附近有无横隔梁的情况．结果证明，这是一种简便、较精确的设计方法．     

Minimal Tetrahedralizations of a Class of Polyhedra

Given a simple polyhedron P in the three dimensional Euclidean space, different tetrahedralizations of P may contain different numbers of tetrahedra. The minimal tetrahedralization is a tetrahedralization with the minimum number of tetrahedra. In this paper, we present some properties of the graph of polyhedra. Then we identify a class of polyhedra and show that this kind of polyhedra can be minimally tetrahedralized in O(n ²) time.     

城镇化视角下的土地流转影响因素研究——基于安徽5个市的农户调研数据

影响土地流转意愿的因素主要包括制度因素、经济因素、政策因素等.本文在城镇化背景下,基于农户角度,通过入户调查和logistic回归模型,研究家庭所在区域、城市购房打算等社会化因素,和土地收入、土地社会保障等土地功能因素对土地流转意愿产生的影响.研究结果表明,农户的社会化因素和土地功能因素对土地流转意愿均产生显著影响.     

西方文论研究与翻译视野

近期,国内的西方文论研究开始出现反思趋势,西方文论本身也成为反思对象之一。反思过程中出现了对西方文论的一些误读,原因之一在于部分研究者可能忽略了自身研究奠基于译文之上的事实,将译文直接等同于原文,因而也可以说是翻译视野的缺失。在西方文论研究中引入翻译视野,即意味着基于译本进行的文论研究须与译本拉开一定的距离。翻译视野又包括转换意识、语境意识、差异意识三重内涵。转换意识即意识到译文是语言转换的结果,同时意识到由转换所导致的信息不对称性;语境意识是指意识到西方文论扎根的特定时空的文化形态及理论家的认知形态;差异意识是指对原作与译作所处时空差异的意识。翻译视野促使我们主动去了解西方文论在原语语境中的起源及发展,辩证地探讨其在译语语境中的适用性,有助于我们在西方文论译介热持续上升的今天,真正深入地理解与反思西方文论的内涵,更好地吸取其精华,批判其糟粕,推动中国文学与文化研究的发展,建构中国自己的理论体系。     

汉语谐音及其语篇衔接作用

首先扼要说明谐音的特征和属性;然后通过多角度分类对汉语谐音作了立体观照;继而在"独用型谐音"(不与其他辞格结合为用的)和"兼用型谐音"(与其他辞格结合为用的)分类基础上,全面考察了汉语谐音的语篇衔接作用;最后就谐音研究中本体与谐体的鉴别、谐音衔接在衔接系统中的站位、汉语谐音对于语篇衔接和话语组织的影响、汉语谐音与汉语及汉文化的关系,作了较为深入的理论探讨.     

论高校思想政治理论课实践教学的整合

"05方案"后,高校思想政治理论课实践教学取得了丰硕成果,但是四门思想政治理论课实践学时的分散性,导致实践教学在具体操作中存在诸多困难。为充分发挥实践教学的功效,应当对四门思想政治理论课的实践教学进行总体整合与具体设计。整合后的实践教学,实现了教学过程的优化,体现了现代教学理念,有利于采用现代教育技术。     

Assessing Risk‐Based Upper Limits of Melamine Migration from Food Containers

Melamine contamination of food has become a major food safety issue because of incidents of infant disease caused by exposure to this chemical. This study was aimed at establishing a safety limit in Taiwan for the degree of melamine migration from food containers. Health risk assessment was performed for three exposure groups (preschool children, individuals who dine out, and elderly residents of nursing homes). Selected values of tolerable daily intake (TDI) for melamine were used to calculate the reference migration concentration limit (RMCL) or reference specific migration limit (RSML) for melamine food containers. The only existing values of these limits for international standards today are 1.2 mg/L (0.2 mg/dm²) in China and 30 mg/L (5 mg/dm²) in the European Union. The factors used in the calculations included the specific surface area of food containers, daily food consumption rate, body weight, TDI, and the percentile of the population protected at a given migration concentration limit (MCL). The results indicate that children are indeed at higher risk of melamine exposure at toxic levels than are other groups and that the 95th percentile of MCL (specific surface area = 5) for children aged 1–6 years should be the RMCL (0.07 mg/dm²) for protecting the sensitive and general population.