摘要：The one-ladle technology requires an efficient ironmaking and steelmaking interface. The scheduling of the hot metal ladle in the steel plant determines the overall operational efficiency of the interface. Considering the strong uncertainties of real-world production environments, this work studies the dynamic scheduling problem of hot metal ladles and develops a data-driven three-layer approach to solve this problem. A dynamic scheduling optimization model of the hot metal ladle operation with a minimum average turnover time as the optimization objective is also constructed. Furthermore, the intelligent perception of industrial scenes and autonomous identification of disturbances, adaptive configuration of dynamic scheduling strategies, and real-time adjustment of schedules can be realized. The upper layer generates a demand-oriented prescheduling scheme for hot metal ladles. The middle layer adaptively adjusts this scheme to obtain an executable schedule according to the actual supply–demand relationship. In the lower layer, three types of dynamic scheduling strategies are designed according to the characteristics of the dynamic disturbance in the model:real-time flexible fine-tuning, local machine adjustment, and global rescheduling. Case test using 24 h production data on a certain day during the system operation of a steel plant shows that the method and system can effectively reduce the fluctuation and operation time of the hot metal ladle and improve the stability of the ironmaking and steelmaking interface production rhythm. The data-driven dynamic scheduling strategy is feasible and effective, and the proposed method can improve the operation efficiency of hot metal ladles.

摘要：本文基于CAN总线,对神朔铁路SS4机车的辅变控制管理系统进行研究,分析了辅变系统的工作原理,给出系统的CAN总线方案、硬件电路设计、CAN通讯协议,并实现了远距离、高可靠性通信功能和远程监控功能。实验表明,基于CAN总线的辅变系统控制更加方便、操作更加安全,提高了电力机车的控制性能、使用寿命。

摘要：This article investigates the performances of different extractive distillation processes intensified with dividing-wall column for separating benzene-isopropanol-water ternary *** the processes with ethylene glycol as solvent are optimized with the minimal total annual cost(TAC)as *** order to get the global optimal solution intelligently,an improved simulated annealing algorithm is adopted,which is programmed in MATLAB and linked to Aspen *** results show that the extractive dividing wall column-solvent(EDWC-S)process consisting of an extractive dividing wall column and a solvent recovery column is the best *** can reduce the TAC by 28.65%and CO_(2) emissions by 32.84% compared to the conventional triple-column extractive distillation process.

摘要：为了适应水利治理现状,统筹安排防洪除涝、水资源供给工程,给南通市水利规划和治理提供支撑,对南通市的水利分区进行复核和调整。在分析南通市地形与水系特性、传统水利分区的基础上,结合地形特点、防洪排涝以及供水的现状和发展愿景,建议将南通市水利分区调整为里下河圩区、斗南垦区、高沙土区、沿江圩区、通吕区、通启区、诸岛区,同时对分区面积也提出了调整建议。

摘要：北京市丰台区城乡一体化小瓦窑村改造项目为高烈度区的大高宽比高装配率居住建筑,竖向预制构件应用比例不低于35%,主体结构采用预制内外剪力墙作为承重抗侧力构件。项目主体结构高宽比为4.0~7.9,远超国家规范限值,创新性地运用抗震性能设计方法,总结高烈度区大高宽比剪力墙结构的抗震性能措施。重点分析与控制预制构件在多遇地震下不出现小偏心受拉,竖向钢筋平均拉应力水平不大于50%的屈服应力,并适当加强边缘构件配箍特征值。在设防地震下构件的拉应力水平不超过2倍混凝土抗拉强度标准值,并对出现小偏心受拉的联肢墙进行加强。在罕遇地震下复核结构的弹塑性层间位移角和损伤情况,验证抗震性能措施的安全性和合理性,保证小震不坏、中震可修及大震不倒的设防目标。

摘要：通过苏州城市生活广场项目对桩基静载桩、周边监测桩的原位测试,得到了加载过程中桩周土层侧阻力分布,加载桩对周边监测桩的影响,为今后类似项目提供了参考资料。

摘要：通过同轴静电纺丝技术,成功制备了一种具有高效呼吸防护性能的环境友好型纳米纤维膜.该纳纤膜将掺入介电沸石咪唑骨架-8(ZIF-8)晶体的聚L-乳酸(PLA)溶液作为壳层,增强了其电荷储存能力,提高了界面间极化效果.另外,得益于纤维的结构设计及ZIF-8的加入,纤维表面形成的凸起结构有效缓解了高空气阻力.结果显示,当壳层溶液中ZIF-8质量分数为4%时,其表面电势和相对介电常数分别达到3.9 kV和1.64.在32 L/min的空气流量下对空气动力学直径小于0.3μm颗粒物(PM_(0.3))的去除效率达到97.99%,压降仅为52.6 Pa,实现了对PM_(0.3)的高效滤除并保持相对较低的空气阻力.此外,基于该纳纤膜的摩擦纳米发电机还能够实现呼吸监测功能.这种独特的设计为制造集呼吸防护和健康监测功能于一体的高性能空气过滤器提供了新的方向.

摘要：By integrating topology optimization and lattice-based optimization,a novel multi-scale design method is proposed to create solid-lattice hybrid structures and thus to improve the mechanical performance as well as reduce the structural *** achieve this purpose,a two-step procedure is developed to design and optimize the innovative ***,the classical topology optimization is utilized to find the optimal material layout and primary load carrying ***,the solid-lattice hybrid structures are reconstructed using the finite element mesh based modeling *** lattice-based optimization is performed to obtain the optimal crosssection area of the lattice ***,two typical aerospace structures are optimized to demonstrate the effectiveness of the proposed optimization *** numerical results are quite encouraging since the solid-lattice hybrid structures obtained by the presented approach show remarkably improved performance when compared with traditional designs.

摘要：Based on the Bingham parallel-plate model, a simplified design method of shear-valve magnetorheological （MR） dampers is proposed considering the magnetic circuit optimization. Correspondingly, a new MR damper with a full-length effective damping path is proposed. The prototype dampers are also fabricated and studied numerically and experimentally. According to the test results, the Bingham parallel-plate model is further modified to obtain a damping force prediction model of the proposed MR dampers. This prediction model considers the magnetic saturation phenomenon. The study indicates that the proposed simplified design method is simple, effective and reliable. The maximum damping force of the proposed MR dampers with a full-length effective damping path is at least twice as large as those of conventional MR dampers. The dynamic range of damping force increases by at least 70%. The proposed damping force prediction model considers the magnetic saturation phenomenon and it can realize the actual characteristic of MR fluids. The model is able to predict the actual damping force of MR dampers precisely.

摘要：To overcome the trade-off between the devisable micro structure and the excellent tensile ductility of bulk metallic glass composites(BMGCs),a novel ex-situ and in-situ hybrid strategy is successfully proposed to design a series of the work-hardenable ductile Ti-based multilayered BMGCs(ML-BMGCs).The asprepared ML-BMGCs,consisting of α-phases,β-phases and amorphous phases,exhibit a controllable multilayered structure of the Ti layers and the amorphous layers with alternative *** size and volume fraction of the crystalline phases are tuned by Nb *** is found that the ML-BMGCs possess a suitable size and volume fraction of the crystalline phases when Nb microalloying content are5%(at.) or 8%(at.),and they obtain an optimum combination of the specific strength of 243 MPa g kg-1 or 216 MPa g kg-1,and tensile plasticity of 4.33%±0.1 % or 5.10%±0.1%.The deformation mechanism of the as-prepared ML-BMGCs during tension is also *** ex-situ Ti layers and in-situ dendrites together effectively serve as absorbers to suppress the propagation of shear bands and multiply shear *** the defo rmation of ex-situ α-Ti phases by dislocation slip and the transformation from in-situ metastable β-Ti phase to orthorhombic α-Ti during tension impart significant work-hardening capability to the ML-B *** present study provides a guidance of developing novel high-performance BMGCs with a controllable micro structure.