阿尔塔什水利枢纽工程水库诱发地震预测

阿尔塔什水利枢纽工程区域地质及地震环境复杂,根据水库区地质构造特点划分库段,根据地质构造环境及水文地质结构面等级划分进行了水库诱发地震预测,并采用概率统计检验法、建立统计预测模型进行了分析预测,供同行参考.     

基于全文检索的Segmenter分词算法改进

流行的Segmenter分词算法是开放的java源代码,它是一个很好的分词工具。但是,在全文检索系统中对分词有特殊的要求,例如歧义包客、专业词典等。所以在这里将Segmenter词典和算法都进行了改选,建立了树状词典,在匹配算法中使用了歧义包容法则、分支处理、动态规划和词库预载入。以适应电子商务案例全文检索系统。     

中职信息技术课程学生学习能力培养的实践研究

在职业教育教学实践过程中,教师面临着"如何培养学生的信息技术学习能力?"问题。通过调查分析,发现研究适合职教学生的课堂教学的方式方法,激发学生的学习积极性是非常必要的。只有这样才能培养学生的创造力、自主学习能力,互相协作及自我约束自我管理的能力。     

公选课教学改革的研究和实践

公共选修课设置的目的是为了拓宽学生的知识面,培养学生的多种技能,从而提高学生的综合素质,以期适应社会发展的要求。本文就公共选修课在教学上存在的问题,以"网络实用技术"公共选修课为例,提出具体的改革措施,实践证明,该措施有效地提高公共选修课教学质量。     

中国戏曲脸谱艺术与现代设计

中国戏曲脸谱有着深厚的文化意蕴和丰富的历史内容,其艺术特征主要有装饰性、程式性、象征性等特征。从戏曲脸谱的这些特点中,我们也能找到很多可以供给现代设计借鉴的内容。本文探索何把中国文化博大精深的内涵应用到现代设计中去,从中国戏曲脸谱艺术里汲取现代产品造型设计的灵感,探讨现代设计与中国传统文化的关系。     

Prospects of Supercritical Fluids in Realizing Graphene‐Based Functional Materials

Supercritical‐fluids science and technology predate all the approaches that are currently established for graphene production by several decades in advanced materials design. However, it has only recently been proposed as a plausible approach for graphene processing. Since then, supercritical fluids have emerged into contention as an alternative to existing technologies because of their scalability and versatility in processing graphene materials, which include composites, aerogels, and foams. Here, an overview is presented of such materials prepared through supercritical fluids from an advanced materials science standpoint, with a discussion on their fundamental properties and technological applications. The benefits of supercritical‐fluid processing over conventional liquid‐phase processing are presented. The benefits include not only better performances for advanced applications but also environmental issues associated with the synthesis process. Nevertheless, the limitations of supercritical‐fluid processing are also stressed, along with challenges that are still faced toward the achievement of the great expectations from graphene materials.     

不同形貌α-Fe2O3的水热法制备及性能研究

以Fe(NO_3)_3·9H_2O为原料,聚乙烯吡咯烷酮作为表面活性剂,NaOH、Na_2CO_3、CH_3COONa为形貌改变剂,采用水热法制备出不同形貌的α-Fe_2O_3,并研究了不同因素对产物形貌的影响。利用SEM、EDS、XRD、FTIR等手段对其物相及微观形貌进行表征,并探讨其生长机理。通过光催化降解酸性大红模拟废水考察不同形貌α-Fe_2O_3的光催化性能,实验结果表明,类桑葚状α-Fe_2O_3对酸性大红模拟废水的降解效果最好,降解率高达99.01%,具有潜在的光催化应用前景。     

Enhanced Thermal Conductivity of 5A Molecular Sieve with BNs Segregated Structures

5A molecular sieves have been widely used as adsorbents in cryogenic distillation for hydrogen isotope separation in fusion reactor engineering, but its low thermal conductivity is detrimental to the process stability. Improving the thermal conductivity of 5A molecular sieves is one of the most important goals for high‐performance devices. Here, firm segregated structures with boron nitride sheets (BNs) are constructed around 5A molecular sieve particles. SEM results show 30 µm BNs tend to form the better networks in comparison with that of 0.12 µm BNs at 40 wt% loadings. It is further verified that BNs with the larger size promote the thermal conductivity. Meanwhile, the thermal conductivity increases with the increasing amounts of BNs. XRD and specific surface area results indicate that the sintering and the addition of BNs exert negligible effects on the structure of 5A molecular sieve. These results indirectly show 5A molecular sieve with BNs segregated structures is very likely to be used for the application of hydrogen isotopic separation. Besides, this work provides new insight into the construction of segregated structure in inorganic porous materials.

     

微波杀菌及包装材料的微波穿透性对湿豆皮保鲜品质的影响

目的 探究不同包装材料结合微波杀菌对湿豆皮保鲜效果的影响,为湿豆皮提供新的保鲜方案。方法 将湿豆皮分别装入OPP/PE和PET/PE/CPP材料的包装袋中,经密封后进行微波杀菌处理,测定其贮藏期间的指标。结果 经微波处理后,湿豆皮在OPP/PE中的表面温度比在PET/PE/CPP中高8 ℃,菌落总数少0.66 lg(CFU/g),说明微波更易穿透OPP/PE材料,更能有效延缓长期贮藏中因微生物活动造成的氧气含量下降和二氧化碳上升,延缓湿豆皮的pH值、水分含量和拉伸性的下降,抑制其TVB-N含量的上升,从而抑制组织结构的破坏,减缓脂质酸败的速率,还可减小色差的变化幅度,维持更高的感官评价得分。结论 采用微波处理能够有效延长湿豆皮的保鲜期,OPP/PE和PET/PE/CPP材料组湿豆皮的保鲜期分别延长了15、12 d左右,且对不同材料包装的湿豆皮品质的影响差异显著。采用微波穿透性更好的包装材料,其微波作用强度更大,杀菌效果更明显,保鲜效果更好。     

一种基于EZW改进算法的图像压缩方法研究

针对原EZW算法未能很好利用图像小波系数特点及按照频率特性量化小波系数的不足,提出了对图像小波系数进行信噪分离、阈值化处理以及对低、高频图像信息进行分阈值量化的改进算法,并给出了在保证复原图像质量情况下扫描终止的判别条件,以节省压缩时间,在实时传输中能有效地提高图像压缩效率。仿真实验结果表明,改进算法无论在扫描相同次数下的信噪比,还是相近信噪比下的压缩比都获得了较大改善,为小波变换下的图像压缩方法提供了新的思路。