镀锌层银盐黑色钝化工艺

在含ＡｇＮＯ３０．５～１ｇ／Ｌ，ＣｒＯ３５～１０ｇ／Ｌ，Ｈ２ＳＯ４０．５～１ｍｌ／Ｌ，光泽控制剂１０～２５ｍＬ／Ｌ的钝化液中处理镀锌层，可获得结合力良好、光亮的黑色钝化膜。     

Patients' awareness of stroke signs, symptoms, and risk factors

BACKGROUND AND PURPOSE: We sought to determine knowledge at the time of symptom onset regarding the signs, symptoms, and risk factors of stroke in patients presenting to the emergency department with potential stroke. METHODS: Patients admitted from the emergency department with possible stroke were identified prospectively. A standardized, structured interview with open-ended questions was performed within 48 hours of symptom onset to assess patients' knowledge base concerning stroke signs, symptoms, and risk factors. RESULTS: Of the 174 eligible patients, 163 patients were able to respond to the interview questions. Of these 163 patients, 39% (63) did not know a single sign or symptom of stroke. Unilateral weakness (26%) and numbness (22%) were the most frequently noted symptoms. Patients aged > or = 65 years were less likely to know a sign or symptom of stroke than those aged < 65 years (percentage not knowing a single sign or symptom, 47% versus 28%, P = .016). Similarly, 43% of patients did not know a single risk factor for stroke. The elderly were less likely to know a risk factor than their younger counterparts. CONCLUSIONS: Almost 40% of patients admitted with a possible stroke did not know the signs, symptoms, or risk factor of a stroke. Further public education is needed to increase awareness of the warning signs and risk factors of stroke.     

彩电机壳结构CAD(Ⅳ) 第四讲 TV-HCCS的表示模型和数据处理

彩色电视机机壳结构CAD系统要处理的数据量是相当大的。本文首先将需要处理的数据分类,然后阐述TV-HCCS表示模型的选取,最后介绍TV-HCCS采用的数据处理方法和相应的数据文件系统。     

城市道路中的高杆照明

分析高杆照明的特点及其在城市道路中应用的实例，进而阐述高杆照明系统中主要参数的确定方法。     

浅谈城市照明监控系统的开发设计

介绍LEAD-2000城市照明监控制系统的设计探索及运行效果。     

地震反射的地层综合效应分析

实践中发现,煤层的反射强度与厚度有直接关系,石油地震勘探中反射层位与钻井地质深度比较往往有较大的误差,本文认为地震反射是一种地层性质的综合效应:同时用过渡层对称层的理论以及超薄层的概念对反射加以分析,得出一致的结论,反射的这种综合效应在煤厚预测、找油地质勘探设计等工作中有一定的应用价值。     

Analytical solution for orthotropic composite plate containing a mode I crack along principle axis

Analytical stress analyses are presented for orthotropic composite materials containing a through crack under uniaxial normal loads (mode I). A harmonic differential equation has been established for the orthotropic plates with axes normal to the three orthogonal planes of material symmetry by introducing new complex variables. The complex theory was employed to find stress functions to satisfy the equilibrium equation, compatibility equation and boundary condition at infinite and crack surfaces. An analytical solution was examined in the case of isotropic materials. It is demonstrated that the analytical solution obtained is correct for the orthotropic composite plates.     

发育有切割井眼结构面的井壁稳定性评价研究

切割井眼结构面的存在弱化了井壁的稳定性，常规完整井眼的井壁稳定分析理论已不能完全适用于受结构面切割的井眼。基于摩尔-库仑理论，在分析结构面应力状态的基础上，给出了井眼受结构面切割的井壁稳定性评价方法，并研究分析了结构面产状对井壁失稳的影响。结果表明，井壁的稳定性与原地应力状态、结构面产状以及结构面的力学性质有关，在其它因素一定的情况下，结构面的走向与倾角对井壁的稳定与失稳方位有着较大的影响。因此，准确评价结构面产出状态是提高井壁稳定性评价精度的前提。     

稀疏脉冲反演技术在井间地震反演中的应用

将传统的波阻抗反演技术应用于井间地震资料反演时，存在着方法适用的域和资料的域不同，井间地震资料的频带比地震资料的频带宽以及频率比地震资料频率高，多对井间地震资料拼接等问题。为此，在胜利油田K71井区，探讨了利用传统波阻抗反演技术（稀疏脉冲反演）进行井间地震资料波阻抗反演的一些技术问题，并用利11对井间地震资料进行了波阻抗反演，获得了较好的反演结果，在井间地震资料反演中，采用匹配滤波方的井间地震资料转换到时间域；利用高分辨率地面三维地震资料，采用统计方法提取反演子波，子波的波形和相位较稳定，频带宽；对测井资料进行标准化处理，在反演的波阻抗剖面上砂体的空间展布形态清晰，对储层的描述更精细；利用时深转换模型，将时间域的波阻抗剖面转换到深度域，直接与测井资料进行对比分析，对储层的描述更直观可靠。     

坡耕地水土综合整治是山丘区新农村建设的战略性措施

目前坡耕地水土流失仍是制约山丘区农村建设的重要因素。对坡耕地实施综合整治是实现水土资源合理开发和可持续利用的关键性措施，是社会主义新农村建设的一项战略性措施。我国广大农村在长期的生产实践中积累了丰富的治理坡耕地的经验。党的十六届五中全会提出的建设社会主义新农村的战略目标，为坡耕地整治提供了很好的机遇。