共查询到20条相似文献，搜索用时 78 毫秒
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静乐宫是武当山古建筑的起点“宫”,按照“不改变文物原状”的原则,无论在规模、法式、材质还是工艺方面,都尽力作了“保持原貌”的复建,较好地保持和再现了它的历史、科学、艺术价值及其承载的原有丰富文化内涵。 相似文献
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研究了一种基于ARM11处理器、采用塔形聚类算法和欧式距离公式进行色差测量的墙地砖色差检测装置,它采用CMOS摄像头进行图像采集,软件用的是Linux操作系统。实验结果表明,该装置能满足墙地砖色差的非接触式检测。 相似文献
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近些年来,超导技术在电力工业中的应用日益广泛,出现了多种应用在电力系统中的超导电力装置,这些装置对电网的安全经济运行将起到重要的作用。超导电力装置中需使用大量的绝缘材料,这些材料大多工作在低温真空的环境中,因此,绝缘材料在低温真空环境中的电气性能将极大影响装置运行的可靠性。笔者研制了一套电极系统,它能够测试绝缘材料在低温真空环境中的击穿特性,并利用研制的电极系统对几种薄膜材料在低温真空中的击穿特性进行了初步研究。通过试验证明,该系统能够可靠、稳定地开展薄膜材料在低温真空环境中的击穿试验。 相似文献
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在土遗址加固保护中,对土遗址加固前后颜色变化(又称色差)和透气性的测试是衡量加固材料加固效果优劣的两个核心因素,同时也是建立土遗址加固评价体系中的两项关键技术指标,两者缺一不可.按照颜色科学领域中国际照明委员会GIELAB标准色度表色系统对色差的评价体系和利用国内外材料科学中对透气性的压差法中的重量测试法,对国内外现有的、常用的几种土遗址加固材料和正在研究中的加固材料进行了加固前后色差和透气性的系统测试,客观地对几种加固材料加固前后颜色变化大小和透气性的优劣作出了初步评价,也为建立土遗址加固的色差和透气性评价体系打下初步基础. 相似文献
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采用二次正交试验设计实验方案,对胡萝卜进行了真空冷冻干燥实验,建立了单位面积生产率与冻干室压强、加热板温度和冻干厚度的二次回归数学模型,分析了过程参数对实验指标的影响特性,并由此得到了冻干生产率的优化参数. 相似文献
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研究了在不加碱pH渐变值条件下,经特殊热处理后,用枯草杆菌碱性蛋白酶和黑曲霉酸性蛋白酶混合水解玉米蛋白的方法,利用正交试验因素法考察了各种水解条件对玉米蛋白水解度和降解率的影响,并得出最佳水解条件是底物浓度80g／l,水解温度为55℃,碱性蛋白酶与底物比为50μl／g蛋白,酸性蛋白酶与底物比为8％（g／g）．利用反相高效液相色谱法测定水解产物氨基酸的成分,这些氨基酸包括人体,必需的八种氨基酸． 相似文献
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李菁熠 《渭南师范学院学报》2015,(2):53-59
以4,4’-二环己基甲烷二异氰酸酯(HMDI)、聚己内酯二元醇(PCL)、二羟甲基丙酸(DMPA)、季戊四醇三丙烯酸酯(PETA)、异佛尔酮二胺(IPDA)为主要原料,制得具有确定硬段结构的可光固化水性聚氨酯聚脲乳液,作为特种纸张表面施胶剂.通过傅里叶红外光谱(FT-IR)对其结构进行了分析;系统研究了双键含量(PETA含量)对乳液和涂膜性能的影响:讨论了此类施胶剂对纸张物理性能的影响.结果表明,随着双键含量的增加,乳液粒径增大;光固化后涂膜的拉伸强度增大,吸水率降低,但断裂伸长率降低;光固化后纸张的环压强度、湿强度及平滑度明显改善,水滴接触角增大;而耐折度略有下降.当w(PETA)=8.20%时,耐折度最高,为646次;当w(PETA)=30.88%时,固化后纸张湿强度达到52.3%,纸张平滑度达到85%.通过研究发现,双键封端光固化聚氨酯可显著提高特种纸张应用性能,未来可替代合成聚合物作为特种纸张施胶剂. 相似文献
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郭团玉 《宁德师专学报(自然科学版)》2010,22(1):71-72
采用真空冷冻干燥、低温物理破碎,制作草莓粉,保持草莓原有营养、保健成份和天然本色,为草莓（浆果类水果）的存储以及制品的开拓,提供广阔的空间.利用牛奶、草莓等为原材料,探索其生产工艺流程和合理配方,开发具有营养保健功能的牛奶伴侣草莓饼干.产品有着相当的市场需求和经济效益. 相似文献
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PRB技术处理铀水冶尾矿酸性渗滤水的可行性研究 总被引：1，自引：0，他引：1
使用消石灰与炼锗煤渣混合物作为PRB材料,进行原位处理铀水冶尾矿酸性渗滤水的可行性实验研究.研究显示了PRB材料中和酸性渗滤水的效果很好,单位立方厘米的比例分别为1∶3、1∶4、1∶6的消石灰与炼锗煤渣混合物可以中和pH值为2.94的渗滤水体积分别为2.23 L、1.66 L、1.34 L;并且对U的去除有明显的效果,pH大于6时,穿透水中金属U的浓度都小于0.1 mg/L;pH大于7时,则穿透水中金属U的浓度大部分小于0.05 mg/L;实验过程中混合物的渗透性只有1∶3的降低,其它二种却没有影响.利用消石灰与炼锗煤渣混合物中和铀水冶尾矿酸性渗出水是可行的. 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献