日光温室非洲菊切花栽培技术

定植前的准备 　　非洲菊栽培地点应该具备土层深厚、土质肥沃疏松、光照充足、地下水位低、水电设施完备、交通便利等条件.南方地区可以采用塑料大棚进行栽培,北方地区一般利用日光温室进行栽培.     

EPDM/PP共混物老化性能的研究

研究了三元乙丙橡胶改性聚丙炮共混物的性能,探讨了不同含量的ＥＰＤＭ对共混物的力学性能,热性能、流变性能的影响,还探讨了不同品种,不同含量的抗氧剂对共混物耐老性影响。     

InGaZnO thin films grown by pulsed laser deposition

We fabricated InGaZnO (IGZO) ceramic target (In: Ga: Zn = 1: 1: 4 in atomic ratio) using solid-state reaction at ambient atmosphere, and deposited IGZO thin films on quartz glass at room temperature under various oxygen partial pressures using the pulsed laser deposition method. Influence of oxygen pressure on crystal structure, surface morphology, optical and electrical properties were investigated. It was found that all the films deposited at room temperature exhibit amorphous structure. On the other hand, the physical properties of the films like transparency, electron mobility, and free-electron concentration were found to be correlated to the oxygen pressure during the deposition and in turn to the possible oxygen vacancies or metallic interstitials in the films. The analysis of X-ray photoelectron spectra (XPS) of the films indicated that there are no metallic 3d states of In, Ga and Zn, suggesting that oxygen vacancies could be main defects that affect physical properties of the films.     

厚煤层不同开采方法覆岩破坏规律研究

在对不同开采方法覆岩破坏高度实测资料分析对比的基础上，研究了冒落岩层高度及碎胀性与覆岩破坏高度的关系，探讨了开采方法对覆岩破坏高度的影响，其结论对于覆岩破坏理论研究及水体下采煤实践具有促进与指导意义．     

非比例阻尼对高层建筑顶部钢塔楼地震反应的影响分析

本文以某综合楼为例,研究了带钢塔楼的钢筋混凝土高层建筑结构体系等效粘滞阻尼比的计算方法,并采用等效粘滞阻尼比来考虑钢塔楼和主体结构不同阻尼耗能特性的影响。计算结果表明,带钢塔楼的钢筋混凝土高层建筑进行地震响应计算时,钢塔楼内力标准值需要根据结构的等效粘滞阻尼比进行调整,其余的结构地震响应可不作调整。     

Preparation of ITO thin films applied in nanocrystalline silicon solar cells

ITO thin films were prepared by changing the experimental parameters including gas flow ratio, sputtering pressure and sputtering time in DC magnetron sputtering equipment. The stable experimental parameters of Ar flow at 70 sccm, O₂ flow at 2.5 sccm ∼ 3.0 sccm, sputtering pressure around 0.5 Pa, and sputtering time of 80 s were obtained. Under these parameters, we had achieved the ITO thin films with low resistivity (<4 × 10⁻⁴ Ω ? cm) and high average transmissivity (95.48%, 350 nm ∼ 1100 nm). These ITO thin films were applied in nanocrystalline silicon solar cells as top transparent conductive layer. The solar cell test result showed that the open circuit voltage (Voc) was up to 534.9 mV and the short circuit current density (Jsc) was 21.56 mA/cm².     

一种基于PCA和RS的文本过滤方法

本文提出一种文本过滤方法,即首先利用PCA(主成分分析)的方法进行文本特征抽取,在此基础上运用RS中决策表上的规则推理方法,发现规则并形成规则库,对于新进来文档将其条件属性与规则库里规则进行相似匹配,进行文本过滤。实验结果表明,此方法用于垃圾邮件过滤能取得很高的正确率和召回率。     

塑料异型材挤出模具中内筋的口模流道设计

本文简述了在不同的挤出速度下,塑料异型材挤出模具中各种结构形式内筋的口模流道设计     

Enhancement of upconversion luminescence of Y2O3:Er nanocrystals by codoping Li-Zn

The upconversion (UC) luminescence in sol-gel synthesized Li⁺, Zn²⁺, or Li⁺-Zn²⁺ codoped Y₂O₃:Er³⁺ nanocrystals were investigated under the excitation of a 970 nm diode laser. Compared to undoped Y₂O₃:Er³⁺ samples, proper doping of Li⁺-Zn²⁺ leads to an drastic increase of the UC luminescence centered at 560 nm by a factor of 28. The UC luminescence enhancement is a result of the increased lifetime of the intermediate state ⁴I_11/2 (Er). The intensity ratio of the green over red emissions (green/red) is also affected by the codoping of Zn²⁺, Li⁺ and Li⁺-Zn²⁺ ions. Our results demonstrated that the Li⁺-Zn²⁺ codoping in Y₂O₃:Er³⁺ phosphors produced remarkable enhancement of the UC luminescence and green/red ratio, making this nanocrystal a promising candidate for photonic and biological applications.     

含P507的胶质液态泡沫、微胶囊和萃淋树脂萃取稀土的研究

制备了包含Ｐ５０７（（２ 乙基己基）膦酸单（２ 乙基己基）酯）的胶质液态泡沫和微胶囊,并用于萃取稀土离子Ｙ３＋、Ｎｄ３＋、Ｙｂ３＋。测定了胶质液态泡沫、萃淋树脂的饱和萃取容量、分配系数及酸度对分配系数的影响。测定了胶质液态泡沫萃取不同稀土离子的渗透系数,并用渗透系数比较了含Ｐ５０７的胶质液态泡沫、微胶囊、萃淋树脂萃取稀土离子的传质顺序为：微胶囊＞萃淋树脂＞胶质液态泡沫。