Structural Analysis and Control of a Model of Two-site Electricity and Heat Supply

This paper introduces a control problem of regulation of energy flows in a two-site electricity and heat supply system, where two Combined Heat and Power (CHP) plants are interconnected via electricity and heat flows. The control problem is motivated by recent development of fast operation of CHP plants to provide ancillary services of power system on the order of tens of seconds to minutes. Due to the physical constraint that the responses of the heat subsystem are not necessary as fast as those of the electric subsystem, the target controlled state is not represented by any isolated equilibrium point, implying that stability of the system is lost in the long-term sense on the order of hours. In this paper, we first prove in the context of nonlinear control theory that the state-space model of the two-site system is non-minimum phase due to nonexistence of isolated equilibrium points of the associated zero dynamics.Instead, we locate a one-dimensional invariant manifold that represents the target controlled flows completely. Then, by utilizing a virtual output under which the state-space model becomes minimum phase, we synthesize a controller that achieves not only the regulation of energy flows in the short-term regime but also stabilization of an equilibrium point in the long-term regime. Effectiveness of the synthesized controller is established with numerical simulations with a practical set of model parameters

Mutant huntingtin impairs Ku70-mediated DNA repair

Mutant huntingtin prevents interaction of the DNA damage repair complex component Ku70 with damaged DNA, blocking repair of double-strand breaks

地域電熱供給システムにおける複合スケールダイナミクスの解析と制御

京都大学0048新制・課程博士博士(工学)甲第20374号工博第4311号新制||工||1668(附属図書館)京都大学大学院工学研究科電気工学専攻(主査)教授 引原 隆士, 教授 山川 宏, 教授 松尾 哲司学位規則第4条第1項該当Doctor of Philosophy (Engineering)Kyoto UniversityDFA

Polystyrene-Supported PPh(3)in Monolithic Porous Material : Effect of Cross-Linking Degree on Coordination Mode and Catalytic Activity in Pd-Catalyzed C-C Cross-Coupling of Aryl Chlorides

Hybridization of porous synthetic polymer and sophisticated ligands play an important role in transition-metal catalysis for chemical transformations at laboratory and industrial levels. A monolithic porous polymer, which is a single piece with continuous macropores, is desired for high permeability, fast mass transfer properties, high stability, and easy modification. Herein, we first develop a monolithic porous polystyrene containing three-fold cross-linked PPh3(M-PS-TPP) for transition-metal catalysis. The monolithic and macroporous structure ofM-PS-TPPwas fabricated via polymerization-induced phase separation using porogenic solvent. Moreover, theM-PS-TPPwas synthesized using different feed ratios of divinylbenzene (DVB) for site-isolation and mono-P-ligating behavior of PPh3.P-31 CP/MAS NMR analysis revealed that the different selectivity ofM-PS-TPPs was obtained in formation of mono-P-ligation toward Pd-II. The macroporous properties and controlled mono-P-ligating behavior ofM-PS-TPPfacilitated the challenging Pd-catalyzed Suzuki-Miyaura cross-coupling reaction of chloroarenes

Polystyrene-Cross-Linking Triphenylphosphine on a Porous Monolith : Enhanced Catalytic Activity for Aryl Chloride Cross-Coupling in Biphasic Flow

Immobilized transition metals for continuous-flow catalyses are greatly in demand to achieve automation, scale-up, facile separation, regeneration, and energy-saving production with high level of sustainability and efficiency. Here, we report a tertiary phosphine immobilized on a macroporous monolith (M-PS-TPP) for the challenging Pd-catalyzed cross-coupling reaction of aryl chloride in a continuous-flow system. The monolithic and macroporous structure of M-PS-TPP was fabricated by bulk polymerization in the presence of a high internal phase emulsion (HIPE) template. Owing to the large pore size and high porosity, the M-PS-TPP showed high permeability against continuous flow of the mobile phase. The continuous-flow Suzuki-Miyaura cross-coupling reaction was realized by permeation of organic/aqueous media containing inorganic salt through a Pd-loaded monolith (M-PS-TPP-Pd) column without serious clogging. Controlling coordination chemistry and hydrodynamics of M-PS-TPP-Pd boosted highly active phosphine-metal complex formation and fast mass transfer of reactants. Indeed, the M-PS-TPP-Pd column showed surprisingly higher yields (similar to 93%) and turnover numbers (2704) under continuous-flow conditions than that under batch conditions (similar to 6%)

Polystyrene‐Supported PPh 3

Hybridization of porous synthetic polymer and sophisticated ligands play an important role in transition-metal catalysis for chemical transformations at laboratory and industrial levels. A monolithic porous polymer, which is a single piece with continuous macropores, is desired for high permeability, fast mass transfer properties, high stability, and easy modification. Herein, we first develop a monolithic porous polystyrene containing three-fold cross-linked PPh3(M-PS-TPP) for transition-metal catalysis. The monolithic and macroporous structure ofM-PS-TPPwas fabricated via polymerization-induced phase separation using porogenic solvent. Moreover, theM-PS-TPPwas synthesized using different feed ratios of divinylbenzene (DVB) for site-isolation and mono-P-ligating behavior of PPh3.P-31 CP/MAS NMR analysis revealed that the different selectivity ofM-PS-TPPs was obtained in formation of mono-P-ligation toward Pd-II. The macroporous properties and controlled mono-P-ligating behavior ofM-PS-TPPfacilitated the challenging Pd-catalyzed Suzuki-Miyaura cross-coupling reaction of chloroarenes