Inflow and outflow processes are common phenomena in daily life. Many types of research have been conducted to study the features of the outflow process, especially in scenarios with a single room or a straight corridor. A few scholars have paid attention to the movement characteristics of pedestrian inflow. Further explorations are still under great demand. In this contribution, a set of pre-conducted experiments are used to analyze the characteristics of the pedestrian inflow process with inactive persons. In these experiments, inactive persons were required to randomly cease within the room, leading to intensive detour behavior of pedestrians. The characteristics are carefully investigated using gradient analysis and curl analysis. To mimic the aforementioned inflow process, static global field is constructed to heuristically navigate a social force based microscopic model. The proposed model can reproduce the self-organized phenomena in the experiments. Our work can help understand the field feature of the pedestrian inflow process with inactive persons. High chaos level areas can be marked out providing practical information for managers.

Ternary compounds with an immiscible pair of elements are relatively unexplored but promising for novel quantum materials discovery. Exploring what third element and its ratio that can be added to make stable ternary compounds out of an immiscible pair of elements remains a great challenge because the number of possible combinatorial combinations of chemical compositions and crystal structures is enormous. In this work, we combine a machine learning (ML) method with ab initio calculations to efficiently search for the energetically favorable ternary La-Co-Pb compounds containing immiscible elements Co and Pb. Three previously reported structures are correctly captured by our approach even though these structures are excluded from the database for ML. Moreover, we predict a new stable La3CoPb compound and 57 low-energy La-Co-Pb ternary compounds whose formation energies are less than 100 meV/atom above the convex hull. Attempts to synthesize La3CoPb via multiple techniques ranging from arc melting and annealing, solid state reactions, and high pressure synthesis produce mixed or multi-phases samples with, at best, ambiguous signals of the predicted lowest-energy La3CoPb and the second lowest-energy La18Co28Pb3 phases.