An assembly-to-order system, which at the end the buffer distinguishes its assembly stages of the system from the downstream systems, is considered in this paper. The system produces semi-finished products for the dow...An assembly-to-order system, which at the end the buffer distinguishes its assembly stages of the system from the downstream systems, is considered in this paper. The system produces semi-finished products for the downstream system and starts from a basic subassembly, and at each stage a component is assembled into the corresponding subassembly. The basic subassembly, components and buffer all follow a periodic-review, order up-to-level inventory policy. The buffer holds the semi-finished products to serve the specific demand from the downstream system. The service level of the system is determined by aggregate effects of the components held at stockpiles before the buffer and the basic subassembly. In order to measure the service level of the system, some notations and assumptions are made, on which the closed form expression of the service level of the system is achieved.展开更多
Herein,we demonstrate a very useful strategy to construct cage-based metal-organic frameworks(MOFs)with third-order nonlinear-optical properties.More specifically,by employing the Zr_(4)L_(6)(L=embonate)cages to assem...Herein,we demonstrate a very useful strategy to construct cage-based metal-organic frameworks(MOFs)with third-order nonlinear-optical properties.More specifically,by employing the Zr_(4)L_(6)(L=embonate)cages to assembly with N-contained ligands and Mn^(2+)/Zn^(2+) ions,four Zr_(4)L_(6)-cage-based MOFs have been synthesized and structurally characterized.Among them,a 3D framework with strong aromatic π−πstacking force exhibits a good optical limiting effect.展开更多
基金This research is supported by the National Natural Science Foundation of China(No. 70332001).
文摘An assembly-to-order system, which at the end the buffer distinguishes its assembly stages of the system from the downstream systems, is considered in this paper. The system produces semi-finished products for the downstream system and starts from a basic subassembly, and at each stage a component is assembled into the corresponding subassembly. The basic subassembly, components and buffer all follow a periodic-review, order up-to-level inventory policy. The buffer holds the semi-finished products to serve the specific demand from the downstream system. The service level of the system is determined by aggregate effects of the components held at stockpiles before the buffer and the basic subassembly. In order to measure the service level of the system, some notations and assumptions are made, on which the closed form expression of the service level of the system is achieved.
基金supported by the National Natural Science Foundation of China(21922111,21871050 and 21975288)the Natural Science Foundation of Fujian Province(2017J06009).
文摘Herein,we demonstrate a very useful strategy to construct cage-based metal-organic frameworks(MOFs)with third-order nonlinear-optical properties.More specifically,by employing the Zr_(4)L_(6)(L=embonate)cages to assembly with N-contained ligands and Mn^(2+)/Zn^(2+) ions,four Zr_(4)L_(6)-cage-based MOFs have been synthesized and structurally characterized.Among them,a 3D framework with strong aromatic π−πstacking force exhibits a good optical limiting effect.
