摘要：With the gradual depletion of available ore at shallow depth,deep mines have been widely operated around the world and therefore need a longer distance to transport the backfill to the underground *** this case,the determination of pressure drop is more important in the pipeline transportation system *** the pilot loop systems require a large amount of capital and manual investment,even its results are reliable,there is an urgent need to find an alternative simple and cost-saving method to determine the pressure ***,laboratory L-pipe and a pilot-loop tests were employed to study the flow properties of cemented paste backfill cured at various solid and binder *** results indicate that the L-pipe test presented a similar trend to the loop test,but the L-pipe was characterized by higher pressure drop values for various solid and cement *** cement content increased beyond 0%,the paste in the L-pipe showed a slighter difference in pressure drop evolution compared to the paste in the *** results suggest that the simple L-pipe is a workable substitute for semi-industrial loop tests and can provide guidance for designing practical CPB pipeline systems in deep mines.

摘要：为掌握山区复杂流态河流暴雨洪水特性,以吴上湾河大埠口村段河道治理工程为例,利用HEC-RAS软件构建迭代推演水面线分析模型,并结合流域特征值及设计洪水成果,模拟获得控制断面治理前后10年一遇洪水条件下的河道水面线数据。分析结果表明:治理前河道滩地上沙场侵占行洪断面,导致河道水位壅高。通过主河槽扩挖补偿和混凝土挡土墙护岸等措施治理后,河道流速降低、行洪能力增加。HEC-RAS软件对于天然河道复杂流态水文水力计算具有较强适用性,推求数据合理可信。

摘要：为探索海岛监视监测新模式,以“和美海岛”三角岛为例,设计和实现了海岛生态物联网系统,并针对岛内安全管理、环境监测、旅游活动三大场景,围绕生态物联网监视监测要素及指标,建立了三角岛安全、环境、活力3个分项9个评价内容的评价标准及评价方法,实现了三角岛生态物联网监视监测要素—评价方法—业务应用评价体系构建,为海岛生态物联网监测信息化提供实例参考,丰富了无居民海岛监视监测评价体系建设内涵。

摘要：本文介绍了某港区16万吨粮食筒仓配套的除尘系统创新设计及应用情况,主要包括除尘工艺创新,除尘风量确定,节能、防爆、防腐设计等内容。

摘要：充填体强度对安全高效采矿至关重要,而胶凝材料是获得高强度充填体的关键.本文以工业固废为原料,首先借助D-optimal设计方法通过建立强度回归模型和因素影响分析得到矿渣激发剂最佳配比,然后通过矿渣掺量优化试验获得最佳矿渣掺量,进而获得胶凝材料完整配比;并以水泥为参照,借助X射线衍射仪和扫描电镜从水化产物和充填体微观结构揭示充填体强度形成机制.结果表明:(1)激发剂各组分对矿渣敏感顺序为:氢氧化钠﹥熟石灰﹥脱硫石膏﹥硫酸钠,且相互之间存在不同程度的交互作用;(2)在最佳质量配比(矿渣85.00%,熟石灰8.03%,硫酸钠3.96%,脱硫石膏1.85%,氢氧化钠1.16%)下,可获得超过单一水泥3.5倍的早期(1~3 d)强度和2倍的后期(7~28 d)强度;(3)高强度充填体的形成主要与水化产物钙矾石(AFt)和C–S–H有关,钙矾石在早期快速成核与生长,形成有效物理填充作用是形成较高早期强度的主要原因,后期强度则得益于不断累积的C–S–H的包裹黏结作用,使充填体结构进一步致密化.使用该固废基胶凝材料有助于矿山安全采矿;工业固废质量占比86.85%,协同解决了尾砂、矿渣、脱硫石膏等固废;D-optimal设计方法可用于激发剂等多物料混合物的配比设计和因素作用分析.

摘要：微纳光学材料与器件是光通信、光传感、生物光子学、激光、量子光学等诸多光学领域的关键.目前微纳光学设计主要依赖传统数值方法,存在依赖计算资源、创新效率低、得到全局最优设计困难的难题,是当前微纳光学设计的瓶颈.人工智能(artificial intelligence,AI)目前已经在多个学科开展应用,带来了科学研究的新范式.本文从微纳光学设计对象、数据集构建、学习任务与算法以及性能度量四个方面对AI在微纳光学设计领域的应用进行综述.对AI在微纳光学研究中的难点及未来的发展趋势进行了分析与展望.

摘要：随着民用飞机技术精细化和产品复杂性的提高,民用飞机设计已从传统的基于文档的系统工程转变为基于模型的系统工程,系统表达也从以文档为中心转变为以模型为中心。为进一步提高民用飞机设计中系统建模的模型质量与正确性,进而缩短设计的开发周期与成本,探究以模型驱动及验证为主导的系统工程方法在民用飞机设计领域的适用性,建立民用飞机设计的系统工程框架,用以支持民用飞机的可靠设计与高效交付。以Harmony SE建模方法为切入点,介绍其工作流程和建模思想;分析民用飞机在系统工程实践中出现的突出问题,说明Harmony SE方法在民用飞机系统工程领域的适用性,建立民用飞机设计的系统工程实践体系;以油箱增压组件为研究对象,应用实践体系开展组件级系统工程实践。结果表明,文中所提出的民用飞机设计系统工程体系和方法能够正确合理地分配设计需求并建立完整的系统模型,有助于提升现阶段民用飞机设计的效率与准确性。

摘要：针对中长波共光路小型化光学系统设计需求,建立了基于高斯光学与初级像差理论且尺寸受限下的二次成像结构光学指标分配模型。主镜因其边缘光线高度高和承担的光焦度小,其球差、色差和二级光谱是该系统像差的主要来源,为矫正二级光谱,可使用“-、+、-”结构形式的高、中、低相对色散材料的透镜组合作为主镜结构,此时主镜的残余像差较小,采用场镜降低中继镜组光线高度以及非球面矫正球差等方法平衡主镜残余像差。最后开展实例设计,对提出的小型化设计思想进行验证,设计了中波波长3.7~4.8μm、长波波长7.7~9.5μm的共光路双波红外小型光学系统,总长不大于135 mm,结构小巧紧凑,光学传函接近衍射极限,工作温度范围-40~60℃,且对温度不敏感。实现了基于二次成像结构光学指标分配模型的中长波共光路小型化光学系统分析及设计,满足中长波共光路小型化光学系统需求。

摘要：引入热力学的状态参数(exergy),尝试将分析用于锅炉设计计算.通过计算绘制了水和蒸汽的压力-曲线和温度-曲线,给出了1台1025 t/h锅炉计算分析的结果,建议在锅炉设计计算中增加分析计算的内容.

摘要：According to Fromm, the life instinct constitutes the primary potentiality in man, while the death instinct a secondary potentiality, and which of the two prevails depending crucially on the living conditions that the subject experiences during his or her childhood. Not limited to the individual level, Fromm＇s observation works on the collective level as well. Different environments foster different potentialities and lead to the formation of different cultures and ethics. A biophilic ethics treasures the value of love, peace, reciprocal altruism and unity of being, while a biophobic ethics is more addicted to hatred, violence, dualistic confrontation, and mutual destruction. Appling Fromm＇s theory to the interpretation of Charles Johnson＇s Middle Passage, readers can get a newly enlightened understanding of this award-winning masterpiece. Based on Fromm＇s hypothesis about human nature, this article analyzes the representation of the confrontations between the biophobic ethics and the biophilic ethics in this novel, the former being embodied by Captain Falcon＇s ＂syndrome of decay＂ which is also Johnson＇s critical metaphor of Western civilization, while the latter embodied by the Allmuseri culture＇s ＂syndrome of growth＂ which represents Johnson＇s idealistic imagination of the sum of non-Western civilization