焦炉装煤车摩电道改造

针对邯钢焦化厂3#焦炉炉顶装煤车摩电道支架强度不够,易变形,导致装煤在走行时摩电拍易脱离摩电道造成事故的问题,对摩电道支架进行了重新设计,在未使用大型吊装工具的情况下,利用焦炉检修时间完成了对摩电道的整体更换,保证了3#焦炉装煤车的安全稳定运行。     

传感器位置误差下外辐射源雷达三维定位代数解算法

机载外辐射源雷达系统中,部署在飞机上的观测站传感器位置无法精确获知,观测站位置误差将严重影响目标定位精度。对此,该文提出一种观测站位置误差下多基外辐射源雷达3维定位代数解算法。该算法首先利用辅助变量将非线性双基距离和差(BRD)观测方程进行线性化,构造伪线性目标估计模型。然后将观测站位置量测噪声的统计特性融入定位算法,提出一种改进两步加权最小二乘(TS-WLS)算法实现观测站位置误差下外辐射源雷达目标定位。最后推导了克拉美罗下界(CRLB)和算法的理论误差。仿真结果显示,在适中的BRD量测误差和观测站位置误差下,所提算法的目标定位性能能够达到CRLB。

     

浅谈干式高压潜水电机设计

从电磁、密封结构、通风结构和监控等方面阐述干式高压潜水电机的设计要点,根据水泵实际运行工况和使用环境特殊性,设计符合水泵实际运行要求的电机产品.     

Enzyme-Inspired Nanoreactor Containing Light-Controlled “Trojan Horse” for Redox-Hypersensitive Drug Delivery

The applications of bioresponsive materials are limited by the low levels of physiological triggers and spatiotemporal barriers in vivo. To address these issues, a light-controlled “Trojan horse” strategy is proposed by encapsulating a photo-caged reducing agent within reduction-responsive polymer vesicles. The polymersomes act as an enzyme-inspired nanoreactor for efficient photo-synthesis of dithiothreitol in situ, which attacks the disulfide bonds in polymer backbones and disintegrates the vehicles from the inside in a nanoconfined space. The assembly-catalyzed photoreduction reaction overcomes the temporal and spatial barriers for hyper-responsivity and enables ultrafast drug release even at 0.014 mm of dithiothreitol residues, a concentration 715 times lower than that required to cleave disulfide bonds. In addition, in both vitro and vivo, the equipment of upconverting nanoparticles and photothermal agents creates a near-infrared light-activated and self-heating nanoreactor, which allows for efficient intracellular drug delivery and excellent photo-chemo-immunotherapy of tumors. This work presents a new approach to designing smart materials and a promising platform for on-demand drug delivery applications.     

Mountain railway alignment optimization integrating layouts of large-scale auxiliary construction projects

Mountain railway alignment design is an important but complex civil engineering problem. To overcome the drastically undulating terrain, long tunnels and high bridges are major structures used along a mountain railway, which poses great challenges for railway design and construction. Unfortunately, despite being studied for many years, the crucial construction factors of complex structures have received slight attention in alignment optimization. In this paper, for the first time, the layout of large-scale auxiliary construction projects (LACPs), including tunnel shafts and access roads, is incorporated into the alignment design process in order to consider construction practicability and economy. Primarily, an alignment–LACPs concurrent optimization model is built. After defining the comprehensive design variables, the alignment–LACPs total construction cost is formulated as the objective function. Besides, the separate constraints for designing the alignment and LACPs are considered. Also, a construction duration computation is proposed for constraining the alignment–LACPs integration. To solve the model, a four-step hybrid solution method is developed. Specifically, the alignment is first generated with a particle swarm optimization (PSO). Afterward, a new divide and conquer approach is devised to search for shaft alternatives along the alignment. Then, a customized Dijkstra algorithm is developed to search for complex access roads. Finally, a novel polynomial mechanism for time-varying acceleration coefficients (TVAC) is designed for PSO to evolve the alignment–LACPs solutions. The above model and methods have been applied to two complex actual mountain railway examples. Their effectiveness is demonstrated through detailed analysis of resulting railway solutions and control experiments with contemporary TVAC-based methods.     

热处理对激光沉积Ti60A高温钛合金组织及性能的影响

采用激光熔化沉积方式成形了近α高温钛合金Ti60A厚壁板材,分析了凝固组织形成机理。结果表明,激光沉积Ti60A合金的凝固组织由沿沉积方向定向生长的柱状晶组成,晶内是均匀分布的细小网篮组织。在α+β两相区上部和α单相区进行双重退火热处理,系统研究了双重退火温度对显微组织和力学性能的影响。结果表明,合金经过双重退火热处理后,获得了具有"蟹爪"状初生α相和细片层状β转变组织的"特殊双态组织",同时降低第一次退火温度能够消除连续晶界α相。因片层间β相具有良好的协调变形能力,双重退火处理可以提高合金塑性。     

A KMnF3 perovskite structure with improved stability,low bandgap and high transport properties

Here, a new promising perovskite structure of KMnF₃ has been fabricated and characterized, which yields bandgap of 1.6?eV with fascinating moisture-resistance and phase stability. Investigation of structural, optical, stability and transport properties have done by XRD, SEM, UV–vis–NIR spectroscopy, photoluminescence and electrical conductivity test. Such examination indicated the high carrier mobility (18?cm²/V?s) and density (10¹⁴/cm³) even after a long interval between each excitation. These transport properties are comparable to that of the organic perovskite, indicating the importance of KMnF₃ for solar device applications.     

前织工序纱线毛羽的测试与改善途径

通过大量的工艺试验和测试，详细分析了络筒、整经和浆纱等工序的工艺参数对纱线毛羽的影响，并探讨了减少纱线毛羽的各种措施。     

大豆蛋白纤维与粘胶混纺针织纱的开发

介绍了大豆蛋白纤维的性能特点 ,通过工艺试验 ,分析了纤维性能、纺纱工艺等影响纱线质量的一些因素 ,并提出了相应的技术措施     

河北省丰宁县岗子矿泉水水化学特征及资源评价

随着社会经济的发展以及水资源的不断开采利用,地表水以及浅层地下水在一定程度上受到污染,纯净的饮用天然水需求量逐年上升,饮用天然水的开发利用及水源地调查评价在现阶段具有重要意义。本文综合了水文地质调查、水文地质试验、水质检测等工作成果,对岗子矿泉水水源地水文地质条件、水化学特征进行了分析,对区内矿泉水资源潜力进行了初步评价,并对下一步开发利用提出了建议。岗子矿泉水为偏硅酸型饮用天然矿泉水,水化学类型为重碳酸-钙（HCO₃-Ca）型,含水层岩性主要为古近系—新近系砾岩、白垩系砂砾岩,地下水类型为基岩风化裂隙水和构造裂隙水,补给来源为大气降水,受地形控制,大气降水深入地下后,由南东向北西方向径流,排泄方式主要为人为开采。通过计算,矿泉水水源地允许开采量为31.88×10⁴ m³/a,结合成因分析初步评价研究区矿泉水资源潜力为9.451×10⁶ m³/a。研究成果可为今后研究区矿泉水开发利用、矿业权设置提供科学依据。