用5-苯基-环己烷-1,3-二酮-4-碳酰替苯胺作双基推进剂的安定剂

用5-苯基-环己烷-1,3-二酮-4-碳酰替苯胺作双基推进剂的安定剂,在安定性试验中得到了较好的结果。试样在100℃时贮存12天后,用不同的溶剂提取,以柱形色层分离法分离1,3-二酮安定剂的各种硝基衍生物。     

以褐煤腐植质为基础制取染料

证明了以褐煤腐植质为基础制取木材染料的可能性。完成了各种因素对提取染料过程影响的评价。制取了符合工业上需要的用于木材的腐植染料。     

The ergonomic evaluation of work stress in the furniture industry

In some furniture factories an ergonomic analysis of work stress was carried out at 10 workplaces typical for this industry. Physical and psychological stress, the influence of the work environment and some elements of the work-organization were measured. In order to compare the stress at the different workplaces, a point scale was applied. This investigation showed that the energy expenditure of the workers varied between 1026 and 1937 kcal during one shift. Psychological stress was not large. Environmental conditions were stressful. Noise levels at all locations exceeded 90 dB(A), and lighting was inadequate. The investigations also showed that the greatest stress appeared in the operation of the horizontal belt sanding machine and of the tilting arbor saw. The least stress was observed in the operation of the hydraulic hot-plate press and of the edge-glueing press-chain conveyor system.     

基于两相漂移流理论的蒸汽发生器计算程序(CCM)的应用

介绍了一个建立在两相漂移流和相边界可连续移动模型基础上的、可较为全面描述单相及两相流的传热和流动的程序CCM.该程序通过"修正的有限元方法"对控制体节点之间建立联系,保证模拟效果的同时,节省了计算时间.以CCM为基础的UTSG-3程序可较好地模拟U型管蒸汽发生器的稳态和瞬态过程,可得到更为广泛的应用.通过不同运行参数的扰动研究了大亚湾核电站蒸汽发生器动态响应过程,结果显示UTSG-3程序具有模拟U型管蒸汽发生器动态行为的能力.     

热轧过程中的微观组织预测

为了模拟轧制钢板产品的条件下微观组织的演变,建立一个三维的有限元模型并采用相应的计算方法. 为了研究轧制参数例如轧制速度、板子的压下量对变形行为以及微观组织演变的影响进行一系列的有限元仿真,对进行热轧参数的选择提供必要的依据,从而可以对设计好的微观组织的材料进行加工处理.     

实时多处理器系统中基于能量节约的动态调度算法

当前处理器由于较高的能量消耗。导致处理器热量散发的提高及系统可靠性的降低，已经成为目前计算机领域较为关心的问题．然而目前一些有效降低能量消耗的技术大多针对单处理器系统，较少考虑多处理器系统．本文提出的调度算法针对多处理器系统，以最短任务优先调度为基础，结合其它有效技术，如共享空闲时间回收等，使得实时任务在其截止期内完成的同时能够有效地减低整个系统的能量消耗．针对独立任务集及具有依赖关系的任务集，本文提出两种算法：STFBA1及STFBA2（Shortest Task First—Based Algorithm）．与目前所知的有效算法相比，我们的算法具有更好的性能（调度长度及能量消耗）．     

声音与震动阵列的分析、实现与应用

In this paper, we consider the analysis, implementation, and application of wideband sources using both seismic and acoustic sensors. We use the approximate maximum likelihood (AML) algorithm to perform acoustic direction of arrival (DOA). For non-uniform noise spectra, whitening filtering was applied to the received acoustic signals before the AML operation. For short-range seismic DOA applications, one method was based on eigen-decomposition of the covariance matrix and a second method was based on surface wave analysis. Two well-known optimization schemes were used to estimate the source locations from the estimated DOAs at sensors of known locations. Experimental estimation of the DOAs and resulting localizations using the acoustic and seismic signals generated by striking a heavy metal plate by a hammer were reported.     

Shape retention of injection molded stainless steel compacts

The effects of the binder composition, the powder loading, the thermal properties of feedstocks, and the injection molding parameters on the compact shape retention for metal injection molding 17-4PH stainless steel were investigated. The high-density polyethylene is more effective than ethylene vinyl acetate as a second component of the wax-based binder to retain compact shape due to its higher pyrolytic temperature and less heat of fusion. The compact distortion decreases with increasing the powder loading, molding pressure and molding temperature. There exists an optimal process combination including the powder loading of 68 %, molding pressure of 120 MPa and molding temperature of 150℃. Under this process condition, the percentage of distorted compacts is the lowest.     

Preparation of Laminin-apatite-polymer Composites Using Metastable Calcium Phosphate Solutions

1Introduction Themostimportantrequirementofapercutaneous deviceisthepreventionofbacterialinfectionthroughtheinterfacebetweenthematerialandtheskin.Therefore,a percutaneousdevicehastoadherefirmlytoskintissueandpreventepidermaldowngrowth.Previously,Aokietalp…