计及两阶段需求侧响应荷源协调消纳弃风调度模型

提出一种针对弃风消纳的日前日内两阶段调度模型。与传统的热电联合模型相比,引入了基于消费者心理学模型的价格需求响应,其通过极具代表性的历史数据拟合得来且充分考虑用户对电价的响应规律,更符合实际用户情况,最大程度对负荷进行削峰填谷以应对风电的反调峰特性,为风电上网提供空间。日内引入激励性需求响应协调调度,调度模型是以系统总经济成本最小为目标函数的混合整数规划问题。以某地电网为算例表明:所提模型有效,系统总运行经济成本明显减少,弃风状况得到改善。     

微型管带式冷凝器的性能实验研究

建立了微型冷凝器测试实验台,在微型管带式冷凝器内进行了制冷剂(R134a)的冷凝实验,获得了空气侧和制冷剂侧流动阻力关系式,并与前人实验结果进行了比较,验证了设计换热量.     

王安石翻案诗的政治解读及其诗史意义

王安石好作翻案诗,早期的翻案诗多在立意上翻新,包括转移视点执其一端立论和推陈出新两种主要方式。这一类翻案诗多为咏史诗,"有所为而为"的写作态度使之精深峭拔,最见荆公襟怀,必须结合王安石的政治关怀和当时的政治背景来解读此类诗作,泥于字句很容易与原旨产生偏离。王安石晚期的翻案诗创作多为诗法翻新,主要包括反用前人诗意及典故、章法上的推倒扶起和句法上的前后反覆三个方面。此类诗为宋诗新变指出了一条新的门径,以往文学史研究多强调荆公体或半山体对唐诗的回归,对此多有忽略。     

铬修饰ZrO2晶体晶粒大小的测定研究

研究了铬修饰的ZrO2晶体的晶相和晶粒大小,以及铬修饰后的ZrO2晶体晶粒尺寸和比表面积间的关系.     

Implementation of service-learning in engineering and its impact on students’ attitudes and identity

The current paper outlines a concise engineering service-learning model and describes its implementation and logistics in the context of a typical heat transfer course for undergraduate engineering students. The project was executed in collaboration with a not-for-profit organisation. Summative reflections were conducted by the students by answering a set of carefully-phrased questions after conducting the project. The students had to write about their feelings, attitudes, identity, and the physical, social, ethnic and economical environment they had experienced as they performed the service. A quantitative method for analysing reflections is presented. Analysis of the students’ responses clearly showed that they became more aware and sensitive to their roles as engineers in a societal context.     

CD44v6mRNA和HSP70mRNA在胃癌中的表达及研究

目的:检测CD44v6mRNA和HSP70mRNA在胃癌组织中的表达,探讨CD44v6mRNA和HSP70mRNA在胃癌发生发展中的作用.方法:利用核酸原位杂交技术对39例胃癌组织进行检测.结果:CD44v6mRNA和HSP70mRNA在胃癌组织表达的阳性率都为61.54%(24/39),CD44v6mRNA和HSP70mRNA在高分化管状腺癌与低分化管状腺癌中的表达都有显著性差异(P＜0.05),但HSP70mRNA在胃癌组织的表达与性别、年龄、浸润深度及淋巴结有无转移都无关(P＞0.05),而CD44v6mRNA与淋巴结有无转移有关(P＜0.05).结论:CD44v6mRNA和HSP70mRNA在胃癌组织都有较高的表达,两者均可作为评估胃癌预后的指标.     

大温差空气源热泵热水器实验台的研制

介绍了研制本实验台的背景,给出了实验台的工作原理图及各主要部件的技术参数。通过实验(在人工环境实验室内)分别对实验台在单级压缩模式及双级压缩模式下的运行特性进行分析比较,显示在低温工况下双级压缩模式的运行性能比单级压缩模式有很大提高。系统设计合理,运行可靠。为进一步研究大温差风冷热泵热水器创造了条件。     

Temperature in High Temperature SHPB Experiments

As an experimental technique,it's desired that the temperature in specimen is uniform in high temperature split Hopkinson pressure bar (SHPB) experiments.However,the temperature in specimen decreases and the temperature of bars increases when specimen starts to contact with bars,which induces the nonuniform temperature distribution in specimen,and may result in inaccuracy of experimental results.In this paper,the temperature distributions of specimen and bars in high temperature SHPB experiments were investigated while the specimen was heated alone.Firstly,the temperature history of specimen was measured at different initial temperatures by experiments,then simulation was carried out.Simulation results were consistent with experimental results by adjusting the thermal contact coefficient between specimen and bars.By this way,the thermal contact coefficient and simulation results were validated,and the proper cold contact times of specimen and bars in high temperature SHPB experiments were discussed.Finally,the results were compared with those in references.     

从“瑜伽热”论我国体育养生项目的推广

21世纪是生命科学的世纪,人们清楚地知道科学的生活方式是健康长寿的保证,健康科学的养生之道更是受到越来越多人的关注。我国有着丰富的体育养生内容,适合各类人群选择的方法,但由于推广的不足,使得许多健康、科学的养生方法没能很好地普及并充分发挥其养生作用服务于大众,也使体育养生产业的发展受到限制。当今世界瑜伽风靡全球,研究发现瑜伽的推广是顺应了人们健身减压养生关体的需求。而瑜伽与我国丰富的体育养生项目同样源于东方文化,对其传播策略、经营方式以及包装宣传的研究都给我国体育养生项目的推广提供了有益的借鉴。     

云南主产区气候热环境与优质冬春香料烟生产关系的探讨

2001年/2002年在云南冬春香料烟主产区保山的罗明片和柯街片进行密度种植试验和气候考察.揭示出本区冬春香料烟生产季最高最低气温、平均气温和土温时空变化特点及差异气候特征;其中,冬季温度变化关键期(12月/1月)大部时段土温旬均值高于气温O.5℃～3.0℃,最低气温极值为3.0℃～3.4℃,随时空而异.研究表明,密度对烟叶产量和质量的影响以及株高迅速生长的天数随气候类型的不同而异;冬季热量水平低是生产优质冬春香料烟的制约因素;影响冬春香料烟生长发育和烟叶品质的温度因素因地域而异;光温差积影响烟叶总糖含量,10 cm土温影响烟叶烟碱含量;适宜种植密度行株距为40cm×12cm,单株风干烟茎重达28.44g～31.33g/株、风干烟叶重达82.99g～91.41g/株、产量为1 729.1kg～1 903.8kg/hn2.此外,建立了株高-温度关系模型,模型通式:y'=c0 n∑i=1ci·xi.在此基础上,提出在主产区实现优质香料烟生产的对策建议.