图纸空间复位系统在数字化建模过程中的研究与开发

建立矿山数字地质实体模型是生产矿山真三维计算机辅助设计系统开发的基础，而将数字化后的二维矿山图纸转化成空间三维图纸的技术则是地质实体建模的关键。基于AutoCAD平台，利用VC++6.0和Object ARX2007技术，结合纸质图纸数字化、基点定位、图形坐标转换等方法，设计研发了图纸空间复位系统，该系统运行稳定、操作简单，易学易用，其结果经实践验证准确、可靠。能很好的解决平面图纸空间复位问题，为数字地质实体模型的建立提供了保证。     

Fabrication and Characterization of (Mo1‐xNix) (Si1‐xAlx)2 (x = 0.025, 0.05, and 0.1) Alloys

(Mo_1‐xNi_x) (Si_1‐xAl_x)₂ (x = 0.025, 0.05, and 0.1) alloys were prepared using self‐propagating combustion synthesis from Mo, Si, Al, and Ni powders and subsequently hot‐pressed to achieve a high density of above 96.2%. The combustion products were composed of C11_b MoSi₂ and C40 Mo(Si,Al)₂. A systematic shift of diffraction peaks of C11_b MoSi₂ toward low angles was observed, and C40 Mo(Si,Al)₂ diffraction peaks became stronger with increase of alloying elements. The solid‐solution softening and toughening phenomena were observed in (Mo_1‐xNi_x) (Si_1‐xAl_x)₂ alloys. On increasing x from 0.025 to 0.1, the hardness of the alloys decreased from 9.87 to 8.31 GPa, and the fracture toughness increased from 3.79 to 6.48 MPa m^1/2.     

煤磨热风管道改造的效果

中联万基水泥有限公司4500t/d熟料生产线采用SCLW4-12×13.4第四代篦冷机,煤磨热风取风口和余热发电AQC热风取风口在篦冷机同一对称位置,煤磨与余热发电系统存在争风现象,开停煤磨对余热发电系统影响较大。通过从废气管道处开孔,加装管道和电动阀,与热风管道汇合通往煤磨沉降室,调整相应阀门开度,可以控制入煤磨烟气温度,这样不但提高了余热发电量,而且提高了煤磨产量,同时也降低了窑头排风机的负荷,降低了熟料生产电耗。     

长距离越野带式输送机静动态分析

针对长距离越野带式输送机运输线路复杂、输送带上物料分布不均匀等特点,利用Belt Analyst分析软件,建立了5种出现概率较高的工况模型,静态分析了这5种工况下带式输送机圆周驱动力、电动机轴功率、张紧力等参数的差异,确定了最恶劣工况.同时对带式输送机启动、停车和制动期间输送带关键点张力、滚筒合力、张紧小车位移和速度、...     

3.0T颅脑磁共振主磁体线圈优化设计

为了实现3.0T颅脑磁共振(MRI)的研发突破,对颅脑MRI进行了分析.根据分析结果对主磁体线圈进行了优化,并建立数学模型,进行优化计算.根据计算结果搭建物理模型,进行电磁仿真分析.结果表明,磁场均匀度符合设计要求.因此,提出的主磁体线圈优化设计在结构减小的情况下,具有较高的磁场均匀度.     

A Novel Multifunctional Photocatalytic Separation Membrane Based on Single-Component Seaweed-Like g-C3N4

Multifunctional separation membrane is usually realized by multi-component collaborative construction, which makes the membrane preparation method complicated and uncontrollable. Herein, a novel multifunctional photocatalytic separation membrane is prepared by vacuum self-assembly of single seaweed-like g-C₃N₄ photocatalyst. The seaweed-like g-C₃N₄ gives membrane certain roughness, large specific surface area, excellent hydrophilicity and abundant transport channels. Through a systematic study, the membrane exhibits excellent separation of five oil-in-water emulsions with a maximum flux of 3114.0 ± 113.0 L m⁻² h⁻¹ bar⁻¹ for 1, 2-dichloroethane-in-water (Dc/W) emulsion and a maximum efficiency of 97.4 ± 0.1% for chloroform-in-water (C/W) emulsion. In addition, the seaweed-like g-C₃N₄ with large specific surface area and narrow bandgap render excellent visible light absorption characteristics and accelerate e⁻-h⁺ pairs transport rate, giving the membrane excellent photocatalytic degradation and antibacterial properties. The membrane shows good degradation for eight different pollutants, among which the degradation effect for rhodamine B (RhB), methylene blue (MB), and crystal violet (CV) were ≈100%. The antibacterial efficiency against E. coli and S. aureus is also close to 100%. After 35 consecutive separations of C/W emulsion and 10 consecutive degradations of RhB, the membrane still maintains excellent separation performance. This long-lasting multifunctional separation membrane exhibits broad application prospects in complex wastewater purification.     

快速定量装车站定量仓称重偏载角差问题的研究

快速定量装车站的定量仓称重系统在使用过程中,易因角差出现偏载,以致出现称量误差较大的问题。对不同类型定量仓的称重原理进行了介绍,并通过角差机理分析了称重过程偏载导致称重误差的原因,提出了解决方法,减小了称重误差。     

单翼长距离系统井下辅助通风机与主通风机联合运行保障技术

针对济宁二号煤矿深部开采不均衡生产长距离通风困难问题,采用全矿井通风现状调查、通风网络技术模拟、井下工业性试验等综合研究方法,找出了制约矿井通风系统供风的关键影响因素,提出井下安设辅助通风机与地面主要通风机联合运行的技术和方法,开展了井下辅助风机硐室布置位置研究,实施了联合运行矿井通风系统调整与优化,保证了单翼长距离系统矿井生产的通风需求,实现矿井安全高效生产,社会经济效益显著。     

牵引变电站27.5 kV/2000 kVA单相快速响应低谐波磁控电抗器的设计

设计了一台牵引变电站27.5 kV/2000 kVA单相磁阀式可控电抗器.磁阀式可控电抗器响应速度加快会增加成本或损耗,同时会产生大量谐波,严重影响电能质量,使其在牵引变电站的应用受到限制.为此提出了一种快速响应和谐波抑制的方案,并运用Maxwell和MATLAB软件进行仿真验证.最后,制作一台27.5 kV/2000 kVA的单相油浸磁阀式可控电抗器样机,并进行了测试,结果表明运用该方案设计出的磁阀式可控电抗器具有响应快速和谐波含量低的优点.