We prove the equivalence of EL-shellability and the existence of recursive atom ordering independent of roots. We show that a comodernistic lattice, as defined by Schweig and Woodroofe, admits a ...recursive atom ordering independent of roots, therefore is EL-shellable. We also present and discuss a simpler EL-shelling on one of the most important classes of comodernistic lattice, the order congruence lattices.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
To improve the shift quality of vehicles equipped with dual clutch transmissions (DCTs), a feedforward-feedback control scheme is proposed for clutch slip control during the shift inertia phase. The ...feedforward controller is designed based on differential flatness to track a reference smooth shift trajectory while the proportional feedback controller is to handle the model errors and disturbances. The effectiveness of the proposed controller is verified on a complete AMESim powertrain model for upshift and downshift cases. Moreover, to facilitate the implementation of the controller, the feedforward part of the derived controller is simplified based on lookup tables, which helps to avoid complex calculations. Finally, comparison results between the normal controller and lookup table-based controller show the effectiveness of the lookup table-based controller, and a smooth shift can be provided still.
In order to make the vehicle stable driving under different operating conditions, moving horizon control scheme based on state observer is presented. First, 2 degrees of freedom vehicle model is ...built. Then, the state observer is designed for sideslip angle estimation. Second, the error between actual yaw rate and sideslip angle are used as control value, and the additional yaw moment is obtained by using moving horizon schemes. Third, the stable condition for yaw stability controller is achieved by stability analysis. To verify the effectiveness of the proposed method, hardware-in-the-loop simulation is carried out under the representative running conditions. The simulation results show that the proposed method could improve the handling and stability effectively.
In this thesis, I will discuss the relations and differences between EL-shellable and CL-shellable posets. I will present examples of EL-shellable posets that are previously known to be CL-shellable, ...including rank-selected subposets of EL- shellable posets such as the Smirnov words posets, and comodernistic lattices. I will show that EL-shellability is equivalent to root-independent recursive atom ordering, and present two examples of CL-shellable posets that are not EL- shellable, one of which is a graded poset and the other is ungraded. In the end, I will briefly discuss how I think might fully characterize CL-shellable posets that are not EL-shellable.
We prove the equivalence of EL-shellability and the existence of recursive atom ordering independent of roots. We show that a comodernistic lattice, as defined by Schweig and Woodroofe, admits a ...recursive atom ordering independent of roots, therefore is EL-shellable. We also present and discuss a simpler EL-shelling on one of the most important classes of comodernistic lattice, the order congruence lattices.
Solar Energy Storage Using a ZnS Thin Film Li Baojun, Liang Junbao, Jiang Xingyou, Zhou Meng, Li Wei, Na Yianling, Li Tiansi
Energy sources,
12/2000, Volume:
22, Issue:
10
Journal Article
Peer reviewed
In use of solar energy, the most disadvantageous factor is its discontinuity. On overcast and rainy days or during the night, without sunshine, solar energy systems will stop working. To overcome ...this defect, the usual method is to use photoelectric and photothermic transformation to store solar energy. But because the efficiency of the photoelectric and photothermic systems is low and cost is high, the problem of storing solar energy becomes one of the most essential problems which must be solved. This article introduces ZnS thinfilm storing solar energy. This film can store solar energy and radiate visible light without photoelectric and photothermic middle transformation processes. This method is a new way to use solar energy.
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BFBNIB, GIS, IJS, KISLJ, NUK, PNG, UL, UM, UPUK
This chapter discusses the research on storing solar energy principle by the ZnS thin film. This chapter introduces ZnS thin film storing solar energy. This film can store solar energy and radiates ...visible light without photoelectric and photothermic middle transformation process. This method is new one to use solar energy.This chapter illustrates that, in use of solar energy, the most disadvantage factor is its discontinuity. In the overcast and rain days or on the night, without sunshine, utilization system of solar energy can stop working. To overcome this defect, usual method is using photoelectric and photothermic transformation to story solar energy. But because efficiency of the photoelectric and photothermic is low and cost is high, the storing solar energy problem become one of the most essential problem which must be solved.
This chapter analyses the photoelectron movement and storing energy characteristic in the process making hydrogen. The change of solar energy chiefly has two kinds of forms: solar energy is changed ...into the electric energy using the solar cell and solar energy is changed to thermal energy using the solar energy collector. The changing efficiency of these methods is low and storing the energy is also difficult. The influence of time, season, weather, and region is very notable. The function of high polymer material as photoactive preparation and quenching preparation can decompose water into hydrogen and oxygen in the photoelectron movement reaction, so as to change solar energy into the chemical energy. This method uses chemical way to store energy. On oxidizing efficiency and difficulty, the oxidizing reaction of four electrons shift is better than single electron.
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