攀钢高炉渣综合利用研究进展及产业化建议

本文介绍了攀钢高炉渣提钛及相关技术的研究进展,并通过对各种技术路线的技术性、经济性进行分析比较,建议开发"攀钢高炉渣高温碳化—低温选择性氯化制取TiCl4及建筑材料"的技术路线,是真正解决攀钢高炉渣产业化综合利用问题的最佳方案。     

高校体育专业学生膳食营养状况的研究

对高校体育专业学生的膳食营养状况的研究状况进行综述,旨在了解高校体育专业学生这个特殊人群的膳食营养研究的现状,力图发现目前研究中的缺陷并寻找可能的研究方向。     

NPP distribution related to the terrains along the North-South Transect of Eastern China

Vegetation net primary productivity (NPP) is defined as the accumulative amount of organic matters per unit area and time, which is calculated from the difference between accumulative photosynthesis and accumulative autotrophic respiration by green plants. Since the NPP reflects the physiological and ecological characteristics of the plants and the interactive results of the environmental factors, it is an important index to evaluate a structure of ecological system, functional features and …     

倍频光栅的莫尔条纹研究

用傅里叶频谱分析方法研究了横向莫尔条纹中一个光栅倍频时莫尔条纹的变化，论证了倍频光栅形成的莫尔条纹方向与等周期两RoncK光栅形成的莫尔条纹方向相同，其周期与两小周期光栅的莫尔条纹周期相同，其对比度随倍率的增加而减小的特点，呈现莫尔条纹效应的主要是等栅距光栅和二倍频光栅，介绍了产生倍频光栅的一些方法，如采用滤波的方法，消去光栅的0级衍射波，形成倍频光栅；采用球面波照明光栅，形成倍频的光栅的自成像等，举例说明了其应用，这些应用表明二倍频光栅莫尔条纹可使结构紧凑，测量简单，或使分辨率提高一倍。     

稻壳混凝土配合比设计及对工作性能的影响

以稻壳、粉煤灰、硅灰及水泥等为原料,用全计算配合比法配制稻壳混凝土,试验研究C30稻壳混凝土性能.结果表明:合理的稻壳掺量对混凝土的工作性能有一定的改善作用;适量掺入粉煤灰可以润滑集料颗粒,使混凝土具有更好的黏聚性和可塑性;硅灰和粉煤灰双掺,可以改善稻壳混凝土的黏聚性和保水性,比单掺粉煤灰效果更好.     

Crystallographic texture and earing behavior analysis for different second cold reductions of double-reduction tinplate

Since the production of tinplate with non-earing properties is difficult, especially when it is produced via the double-reduction process, the optimal degree of second cold reduction is particularly important for achieving desirable drawing properties. The evolution of texture and the earing propensity of double-reduction tinplate with different extents of second reduction were investigated in this study. Optical microscopy and scanning electron microscopy were used to observe the changes in the microstructure at various extents of reduction. Two common testing methods, X-ray diffraction (XRD) and electron backscatter diffraction, were used to investigate the texture of the specimens, which revealed the effects of deformation percentage on the final texture development and the change in the grain boundary. The earing rate was determined via earing tests involving measurement of the height of any ear. The results obtained from both XRD analyses and earing tests revealed the same ideal value for the second cold reduction on the basis of the relationship between crystallographic texture and the degree of earing.     

Synthesis and luminescence properties of Mn4+-dopant Ca14Zn6Ga10−xAlxO35 solid solution

Mn~(4+)-activated oxide phosphors,owing to their desirable spectral features,eco-friendly and low cost,are emerging as a new class of non-rare-earth red phosphors for warm white LEDs.However,these phosphors possess low photoluminescence quantum efficiency excited by blue chip currently.Herein we report an isostructural solid solution of Ca_(14)Zn_6Ga_(10-x)Al_xO_(35):0.15Mn~(4+)(0≤x≤10)synthesized by a traditional solidstate reaction route.The microstructure and luminescent performance of this red-emitting phosphor are investigated in detail with the aids of X-ray diffraction,diffuse reflection spectra,photoluminescence spectra/decay/QE,and temperature-dependent PL/QE measurements.Blue shift of energy peaks of~4A_2→~4T_1and~4A_2→~4T_2transition is illustrated by the Tanabe–Sugano diagram and the configurational coordinate diagram.The crystal field strength(Dq)and the Racah parameters(B and C)are carefully calculated to estimate the nephelauxetic effectβrespectively.Particularly we achieve external and internal quantum efficiencies as high as26.1%and 40.3%for Ca_(14)Zn_6Ga_6Al_4O_(35):0.15Mn~(4+)excited by 466 nm,the highest one ever reported in Mn~(4+)activated oxide phosphors under the similar condition.     

古海洋中的热水喷口—广西大厂例析

笔者首次发现广西大厂存在泥盆纪存在海底热水活动的喷口，地质和地球化学研究表明，它们是由富二氧化硅、硫化物和成矿元素的热水溶液喷出海底沉积形成的，是大厂超大型矿床、硅质岩和生物礁古油藏热水沉积成因最直接的标志。     

基于多源数据融合的冰雪条件下车速变化关联性分析

基于多源数据融合,利用关联规则分析中的Apriori算法研究天气条件、路面条件、养护作业等因素与车速变化的关联性,通过速度降低与回复现象有效评估冬季道路养护的效益.结果表明:车速变化与能见度、路面条件和降雪量具有较强关联性,与湿度、风向、工作日、节假日和流量没有相关性.通过数据挖掘技术将存储的多源数据转化为有效的知识和信息,从而可为冬季道路养护提供有效的决策支持.     

预处理对小麦成熟胚愈伤组织形成的影响

研究了种子预处理及生长素质量浓度对小麦成熟胚愈伤组织形成及种子碳水化合物和蛋白质降解的影响。结果表明：１）在２,４－Ｄ质量浓度为８ｍｇ／Ｌ时发芽率最低,出愈率最高。２）低温处理促进冀麦３６种子萌发,抑制其愈伤组织的形成;而对河农３２６种子萌发及愈伤组织形成无明显影响;引起河农３２６种子淀粉酶、蛋白酶活性显著增加。３）ＣａＣｌ２处理促进冀麦３６、河农３２６种子萌发,但抑制其愈伤组织形成,使河农３２６种子淀粉酶活性显著增加。４）ＰＥＧ处理促进冀麦３６、河农３２６种子萌发,抑制河农３２６愈伤组织形成,但对冀麦３６愈伤组织形成无明显影响,并明显引起河农３２６种子淀粉酶、蛋白酶活性升高。