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简要介绍了红色代码蠕虫病毒(red code)及其变体(red codeⅡ)和(red codeⅢ),并对它们的传播、危害、典型现象及其特征与运行过程做了说明,在此基础上分析论述了其发作机理,说明了红色代码病毒利用微软ⅡS的漏洞进行感染与传播,提出了针对网络端和用户端安全实用的检测及预防方案,最后说明了清除的详尽解决方案。 相似文献
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以某电厂300MW汽轮发电机转子轴颈损伤故障为例,介绍了故障的检查、处理措施以及有父的计算分析。展示了汽轮发电机转子轴颈损伤的实物照片,介绍了修理步骤包括修理前的转子电气试验、发电机转子各关键部位的跳动检查及记录与标注,转子本体摆度的测量、转子上车床对轴颈进行车加工、砂修、硬度检查及着色探伤及超声波探伤,装配风叶及赐叶配重,转子清理,转子动平衡及1.1倍额定转速的超速试验,转子绕组电气试验,转子气密试验,喷漆及发运前的防护处理等。 相似文献
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Buffer-modified C60/pentacene as charge generation layer (CGL) is investigated to achieve effective performance of charge generation. Undoped green electroluminescent tandem organic light-emitting diodes (OLEDs) with multiple identical emissive units and using buffer-modified C60/pentacene organic semiconductor heterojunction (OHJ) as CGL are demonstrated to exhibit better current density and brightness, compared with conventional single-unit devices. The current density and brightness both can be significantly improved with increasing the thickness of Al. However, excessive thickness of Al seriously decreases the transmittance of films and damages the interface. As a result, the maximum current efficiency of 1.43 cd.A-1 at 30 mA.cm-2 can be achieved for tandem OLEDs with optimal thickness of Al. These results clearly demonstrate that Cs2CO3/Al is an effective buffer for C60/pentacene-based tandem OLEDs. 相似文献
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In this study, we design and fabricate phosphor-doped host-guest structure organic light-emitting diodes (OLEDs), where the blue-ray iridium complex electrophosphorescent material FIrpic acts as object material. Properties of the device can be accommodated by changing the host materials, dopant concentration and thickness of the light-emitting layer. The study shows that the host material N,N'-dicarbazolyl-3,5-benzene (mCP) has a higher triplet excited state energy level, which can effectively prevent FIrpic triplet excited state energy backtracking to host material, thus the luminous efficiency is improved. When mCP is selected as the host material, the thickness of the light-emitting layer is 30 nm and the dopant concentration is 8 wt%, the excitons can be effectively confined in the light-emitting region. As a result, the maximum current efficiency and the maximum brightness of the blue device can reach 15.5 cd/A and 7 196.3 cd/m2, respectively. 相似文献
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We demonstrate tandem organic light-emitting diodes (TOLEDs) with excellent performance using Al and MoO3 buffer-modified C60/pentacene as charge generation layer (CGL). Al and MoO3 were used as the electron and hole injection layers of C60/pentacene CGL, respectively. Green phosphorescence TOLEDs with the structure of ITO/NPB/mCP:Ir(ppy)3/TPBi/Al/C60/pentacene/MoO3/NPB/mCP:Ir(ppy)3/TPBi/Cs2CO3/Al were fabricated. The results show that the inserted Al and MoO3 can effectively increase the charge injection capacity of organic CGL, resulting the improvement of luminance and current efficiency of TOLEDs. The turn-on voltage of TOLEDs is much lower than that of single-unit device, and the current efficiency is more than 2 times larger than that of the single-unit device. TOLEDs can exhibit excellent photoelectric performance when the thicknesses of Al, C60, pentacene and MoO3 are 3 nm, 15 nm, 25 nm and 1 nm, respectively. The maximum luminance and current efficiency are 7 920.0 cd/m2 and 16.4 cd/A, respectively. This work is significant to build new CGL structures for realizing high-performance TOLEDs. 相似文献
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针对只有一个热红外通道的遥感数据,利用归一化植被指数与地表比辐射率具有较高的线性相关性进行地表比辐射率的遥感反演,介绍了基于归一化植被指数定量反演地表比辐射率的4种方法,以湖北省荆门市地区的Landsat5 TM数据为研究对象,精度0.01的MODIS LSE产品为标准数据,对比分析了4种基于NDVI的地表比辐射率反演方法,分别从像元尺度和分类尺度总结了4种地表比辐射率反演方法的普适性和精度。 相似文献