军民融合协同创新发展模式研究——以新航集团为例

本文基于新航集团产业发展现状及未来发展方向,在国家创新驱动发展的时代背景下,秉持"军民融合,协同创新"的发展理念,不断探索与实践适合自身发展的创新模式,促进军民品产业转型升级。     

Burn-resistant behavior and mechanism of Ti14 alloy

The direct-current simulation burning method was used to investigate the burn-resistant behavior of Ti14 titanium alloy. The results show that Ti14 alloy exhibits a better burn resistance than TC4 alloy (Ti–6Al–4V). Cu is observed to preferentially migrate to the surface of Ti14 alloy during the burning reaction, and the burned product contains Cu, Cu₂O, and TiO₂. An oxide layer mainly comprising loose TiO₂ is observed beneath the burned product. Meanwhile, Ti₂Cu precipitates at grain boundaries near the interface of the oxide layer, preventing the contact between O₂ and Ti and forming a rapid diffusion layer near the matrix interface. Consequently, a multiple-layer structure with a Cu-enriched layer (burned product)/Cu-lean layer (oxide layer)/Cu-enriched layer (rapid diffusion layer) configuration is formed in the burn heat-affected zone of Ti14 alloy; this multiple-layer structure is beneficial for preventing O₂ diffusion. Furthermore, although Al can migrate to form Al₂O₃ on the surface of TC4 alloy, the burn-resistant ability of TC4 is unimproved because the Al₂O₃ is discontinuous and not present in sufficient quantity.     

采光屋面设计中一些问题和解决方法

本文提出了目前在采光屋面设计中存在的一些问题和相应的解决方法。     

石灰石原料品质对立窑生产和熟料质量影响的研究

利用ＳＥＭ、ＸＲＤ等测试手段研究了品质不好的石灰石的结晶形态。从粉磨特性、生普细度、萤石加量、率值的选取及熟料煅烧等几个方面研究了这类石灰石对立这众所周知 熟料质量的影响。     

一种基于CT-SVD的鲁棒水印算法

提出了基于Contourlet变换(CT)和奇异值分解(SVD)的水印算法.与通常直接将水印嵌入至系数中的CT算法不同,选择了CT域低通子带的部分最大系数构建矩阵,对该矩阵进行奇异值分解,经Arnold置乱后的水印结合人眼视觉特性(HVS)被自适应地嵌入至奇异值中.实验结果表明,算法保证了极高的峰值信噪比(PSNR),并且体现了对缩放、JPEG压缩、剪切、滤波等攻击很好的鲁棒性.     

天然汁对绞股蓝愈伤组织增殖的效应

以５种天然汁代替激素２,４－Ｄ、ｋｔ对绞股蓝愈伤组织增殖效庆进行研究,结果表明：所用５种天然汁以玉米汁的效应最佳,最佳浓度为７．５ｍＬ．Ｌ＾－１,其次是荸荠 汁,最佳浓度为１０．０ｍＬ．Ｌ６－１。     

Syntheses and lyotropic liquid crystal properties of a series of sandwich-type tungstoarsenates heteropoly compounds with As/W ratio of 4/30

A series of sandwich-type tungstoarsenates heteropoly compounds with As/W ratio of 4/30, Na16[As4W30M4(H2O)2O112]·XH2O (M = Zn,Cu,Co,Ni,Mn and Cd), have been synthesized for the first time and structurally characterized by elemental analysis, IR and 183W NMR spectra. The crystal structure of Na16[As4W30Cu4(H2O)2O112]·63H2O was determined to be a triclinic system, of P1 symmetry, a = 1.2721(3) nm, b = 2.451 6(5) nm, c = 2.6450(5) nm, α= 89.90(3)°,β= 77.32(3)°, γ= 89.96(3)°, 2=2. Using tetrahepty lammonium bromide as a phase transfer reagent, [As4W30Cu4(H2O)2O112]16- was transferred from aqueous solution to organic phase (benzene), and the heteropolyanion lost the coordination water molecules to form the coordination-unsaturated ion. After lactic acid was added to the benzene solution, the coordination-saturation was recovered. By esterification reaction between lactic acid and cholesterin, the latter was attached to the heteropolyanion indirectly. Therefore, a new type of lyotropic liquid crystal was obtained, which was characterized by a polarimicroscope, DSC and variable temperature wide-angle X-ray diffraction.     

图C4∪St(m)的k优美性及算术性

给出一类非连通图C4∪St(m). 论证当k>1(k∈N)时, 该图是k优美图; 当k>d+1(d>1, d∈N)时, 图C4∪St(m)是(k,d)算术图.     

植物组织DNA的提取及纯化方法的研究

以小麦的幼芽和子房为材料,采用高等植物ＤＮＡ 简易快速提取法,对小麦组织ＤＮＡ提取及纯化中的若干问题做了探讨。研究表明：小麦幼芽是提取ＤＮＡ 的较为理想的材料;粗提ＤＮＡ 用ＲＮＡ 酶法进行纯化,其纯化效果较好;纯化的幼芽ＤＮＡ 稀释８ 倍即符合导入要求。     

CCD器件在轧辊辊形测量系统中的应用

本文介绍了以电荷耦合器件ＣＣＤ 作为传感器的一种辊形测量系统。对该系统的构成、工作原理、检测方案以及软件框图进行了全面的分析。为实现辊形在线检测的高速化、精确化、自动化;为优质板材的生产提供了一种新型方法和初步研究。