一种固态聚合物损耗因子测试方法实验研究

宽频带随机振动冲击噪声会激发结构许多谐振峰,利用粘弹阻尼技术隔振、减振和降噪是一项新的技术措施,尤其是对于宽带随机振动和噪声控制具有特殊效果。在实际减振、降噪工程设计中往往需要知道所选用材料的损耗因子,复模量E*的温度谱的测量已经有专门的论述和成熟的方法。根据一个具体的实验研究探讨频率域复模量的测量进而计算材料的损耗因子。     

对称、倒数与取实数值的复有理分式--对数学问题1216的探研

从对称与倒数的角度出发 ,对数学问题 12 16作了较深入的探研和推广 .     

Emergent pedagogy: learning to enjoy the uncontrollable—and make it productive

This essay reflects the shared experiences of four college faculty members (a biologist, a psychologist, a computer scientist, and a feminist literary scholar) working together with K-12 teachers to explore a new perspective on educational practice. It offers a novel rationale for independent thinking and learning, one that derives from rapidly developing interdisciplinary and transdisciplinary inquiries in the sciences and social sciences into what are known as “complex” or “emergent” systems. Using emergent systems as a model of teaching and learning makes at least three significant contributions to our thinking bout teaching, in three very different dimensions. It invites us into an awareness that the brains of individual students and teachers operate as emergent systems that are neither possible nor desirable to control fully. It invites us to appreciate as well that the activities and benefits of a classroom are not all individual interactions between teacher and student. Interactions among students and teachers are collectively contributing to a somewhat unpredictable project with an insistently social dimension, which is in turn crucial to the individual achievements of all involved. Finally, emergent pedagogy encourages us to consider more carefully the relations between the individual classroom and the larger educational community of which it is a component, including a challenge to rethink the matter of assessment.     

乙酰丙酮邻氨基苯甲酸金属配合物中性载体水杨酸根离子电极的研究

以乙酰丙酮邻氨基苯甲酸合镍(Ⅱ)〔Ni(II)-L〕金属配合物为中性载体的水杨酸根离子选择性电极,对水杨酸根(Sal-)具有优良的电位响应性能和选择性,并呈现反Hofmeister选择性行为,其选择性为:Sal->ClO4->SCN->I->NO3->NO2->Br->Cl->SO42-.线性响应范围为:8.5×10-6~1.0×10-1mol/L,斜率为-54.1mV/decade,检测下限为4.25×10-6mol/L.采用紫外可见光谱技术研究了电极的响应机理,结果表明载体本身的结构与电极的响应性能间有非常密切的关系.电极用于药品分析,其结果令人满意     

从地名看台湾移民的故土情结

闽粤迁台移民具有浓厚的故土情怀,在拓垦台湾的过程中,为求得生存和发展,便出现了以传统的血缘和地缘关系为纽带的聚落。台湾先民为了寄托对故乡的眷恋之情,除了用姓氏给新居住地命名外,还以原籍地名来命名新的垦殖区。台湾移民社会中的冠姓冠籍地名凝聚着中华民族的爱国爱乡的优秀传统,成为维系台湾同胞与祖国大陆的重要精神纽带。     

PMEO_n/PSHMLi 系共混络合物的凝聚态结构和导电性

本工作合成了甲基丙烯酸齐聚氧化乙烯酯(MEO_n)和甲基丙烯酸已磺酸锂(SHMLi)两种单体,基于这两种单体制备了一系列具有单一锂离子导电性的共混络合物;讨论组分聚合物结构,极性基、制样方法等因素对共混络合物凝聚态结构和锂离子导电性的影响;通过在位聚合法制备了室温下锂离子电导率为2.5×10~(-6)S/cm 的共混络合物.     

On the value of project safeguards: Embedding real options in complex products and systems

This study defines a project safeguard as the design and physical development work needed to ensure, or enhance, the embedding of a real option in complex products and systems (CoPS). Safeguards operationalize optionlike strategic thinking at implementation. I examine safeguarding investments through an in-depth multiple-case study of 12 options embedded across 5 projects encompassed by an airport expansion programme. This includes options to phase out delivery (stage-option), grow capacity (growth-option), and switch operational regime (switch-option). Passive safeguards only involve design work, whereas active safeguards involve both design and physical execution. The analysis shows how the confluence between the uncertainty of option exercising and the modularity of the relevant functional elements in relation to the CoPS architecture affects the attractiveness of safeguarding. High uncertainty makes safeguarding less attractive as it can lead to sunk costs that may not pay off over the CoPS operating life. Conversely, high modularity increases the attractiveness of safeguarding because (1) safeguards can be limited to marginal investments at the interfaces between the functional elements with other CoPS subsystems, and (2) the stability of modular design rules increases the likelihood that safeguards remain valid over time. Safeguards build options into integrative CoPS. This flexibility and redundancy makes them resilient to change stemming from option exercising if uncertainties resolve favourably in the future.     

复杂语言关联情境下科技期刊品牌竞争力评价研究

【目的】提高科技期刊品牌竞争力评价的科学性和精确性。【方法】在考虑评价体系的多维度性、多要素性以及复杂关联性的基础上,构建了具有层次子网络结构的科技期刊品牌竞争力评价框架,并给出一种考虑复杂关联情境的评价方法。【结果】该方法借助二元语义信息表示模型,运用决策实验与评价实验室(DEMATEL)法确定评价框架中各维度及其构成要素的重要性程度,采用2-additive Choquet积分算子进行信息处理与集结,从而获得各维度及其综合评价值,并进一步计算出各维度对综合评价值的贡献。【结论】实例分析表明,该方法具有较好的应用价值,能为科技期刊管理者了解现状、有效管理和提升品牌竞争力提供决策支持。     

复集理论

本文是[6]的续篇，是对经典集合的进一步扩张。