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Comprehensive Method of Enhancing business process efficiency using BPMS
Zhenguo Wang,Hyerim Bae 대한산업공학회 2008 대한산업공학회 춘계학술대회논문집 Vol.2008 No.5
When a company uses the BPM (Business Process Management) system, BP (Business Process) efficiency can be influenced by different task assignments and performance sequence of task performers. Consequently, improvement of BP efficiency depends on two different perspectives: PEP (Process Engine Perspective) and TPP (Task Performer Perspective). PEP focuses on task assignment to proper task performer and TPP decides performance sequence of each task performer to improve BP efficiency. We developed a comprehensive approach that applies the two perspectives and build-time and run-time phases are considered separately. For the build-time phase, a new task assignment policy has been introduced from managerial view point by applying Analytic Process Model (APM), and for the run-time phase, a scheduling algorithm has been applied to improve BP efficiency. Furthermore, for the validation of our approach, we compared with previous research by conducting simulation of sample processes.
왕진국(Zhenguo Wang),배혜림(Hyerim Bae) 한국경영과학회 2009 經營 科學 Vol.26 No.1
This paper purposes analyzing how task assignments influence on business process efficiency, and improving business process efficiency in Business Process Management (BPM) environments. For this purpose, task assignment is categorized into dynamic assignment and static assignment. Dynamic assignment binds a user to a task at process run-time, whereas static assignments assigns a task to a user at process build-time. So far, the influence of task assignment methods has not been studied. We, in this paper, analyze the business process efficiency using two different assigning rule, in terms of cycle time as a efficiency measure. The comparison result can provide a guideline for a company who wants to employ commercial BPM systems.
Numerical analysis of Poiseuille-Rayleigh-Bénard convection in supercritical carbon dioxide
Wang Zhipeng,Xu Hong,Chen Chong,Hong Gang,Song Zhenguo,Zhang Yaoli 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.9
The supercritical carbon dioxide (SeCO2) Brayton cycle is an important energy conversion technology for the fourth generation of nuclear energy. Since the printed circuit heat exchanger (PCHE) used in the SeCO2 Brayton cycle has narrow channels, Rayleigh-Benard (RB) convection is likely to exist in the tiny channels. However, there are very few studies on RB convection in supercritical fluids. Current research on RB convection mainly focuses on conventional fluids such as water and air that meet the Boussinesq assumption. It is necessary to study non-Boussinesq fluids. PRB convection refers to RB convection that is affected by horizontal incoming flow. In this paper, the computational fluid dynamics simulation method is used to study the PRB convection phenomenon of non-Boussinesq fluid-supercritical carbon dioxide. The result shows that the inlet Reynolds number (Re) of the horizontal incoming flow significantly affects the PRB convection. When the inlet Re remains unchanged, with the increase of Rayleigh number (Ra), the steady-state convective pattern of the fluid layer is shown in order: horizontal flow, local traveling wave, traveling wave convection. If Ra remains unchanged, as the inlet Re increases, three convection patterns of traveling wave convection, local traveling wave, and horizontal flow will appear in sequence. To characterize the relationship between traveling wave convection and horizontal incoming flow, this paper proposes the relationship between critical Reynolds number and relative Rayleigh number (r).
Comprehensive Method of Enhancing business process efficiency using BPMS
Hyerim Bae,Zhenguo Wang 한국경영과학회 2008 한국경영과학회 학술대회논문집 Vol.2008 No.5
When a company uses the BPM (Business Process Management) system, BP (Business Process) efficiency can be influenced by different task assignments and performance sequence of task performers. Consequently, improvement of BP efficiency depends on two different perspectives: PEP (Process Engine Perspective) and TPP (Task Performer Perspective). PEP focuses on task assignment to proper task performer and TPP decides performance sequence of each task performer to improve BP efficiency. We developed a comprehensive approach that applies the two perspectives and build-time and run-time phases are considered separately. For the build-time phase, a new task assignment policy has been introduced from managerial view point by applying Analytic Process Model (APM), and for the run-time phase, a scheduling algorithm has been applied to improve BP efficiency. Furthermore, for the validation of our approach, we compared with previous research by conducting simulation of sample processes.
A Novel Menthol-Cementing Sampling Technique for Cohesionless Coarse-Grained Fillers
Zhe Li,Zhenguo Zhu,Lulu Liu,Lei Sun,Zhongjiang Wang,Xiaowei Gu 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.2
It is difficult to test the engineering properties of undisturbed cohesionless coarse-grained fillers in the laboratory, especially those with low water contents because most sampling methods disturb the natural structure of the filler. This study proposes a novel sampling method that uses menthol as a temporary cement to obtain samples that are more resistant to disturbance. Liquid menthol infiltrates the interparticle spaces and cements the particles together as it cools, forming a high-strength structure. The samples can then be cut with a cutting ring (for grain sizes ≤ 0.5 mm) or a cutting machine (for grain sizes > 0.5 mm) to prepare the final samples, from which the menthol is removed by heating. To demonstrate the feasibility of the method, a number of laboratory experiments were performed, including sampling tests, confined compressive strength tests, vibration tests, drop tests, and CT scans. The optimal particle temperature for introducing the liquid menthol is 70°C, while 90°C is optimal for removing the cemented menthol. For both cost and anti-disturbance reasons, 20°C is suggested as a suitable storage temperature for menthol-cemented samples. The interspace structure undergoes less change with increases in sample depth and with larger grain sizes. We recommend that the lower two-third of the depth of a menthol-cemented block is used as the final sample for laboratory testing.
OSCILLATION OF SUB LINEAR DIFFERENCE EQUATIONS WITH POSITIVE NEUTRAL TERM
LI, QIAOLUAN,WANG, CHUNGIAO,LI, FANG,LIANG, HAIYAN,ZHANG, ZHENGUO 한국전산응용수학회 2006 Journal of applied mathematics & informatics Vol.20 No.1
In this paper, we consider the oscillation of first order sublinear difference equation with positive neutral term $\Delta(\chi(n)+p(n)\chi(\tau(n)))+f(n,\chi(g1(n)),\cdots,\chi(gm(n)))=0$. We obtain necessary and sufficient conditions for the solutions of this equation to be oscillatory.
Additive-assisted preferential crystallization of racemic component: A case of norvaline
Jie Sun,Yaping Wang,Zhenguo Gao,Junbo Gong,Weiwei Tang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.110 No.-
Herein, we report a successful resolution of L-norvaline, a racemic compound system, performed near theeutectic composition by coupling preferential crystallization with tailor-made additives. The structures ofenantiomer and racemate were characterized by PXRD, DSC, and the enantiomeric purity were measuredby Chiral HPLC. The preferential crystallization process was designed and established from binary meltingphase diagram and ternary solution phase diagram. The effects of supersaturation, solution enantiomercomposition, and seed quantity on the preferential crystallization process were investigated. However, the significant improvements of enantiomeric purity and product yield were demonstratedby additive-assisted preferential crystallization approach using tailor-made additives. These additivesbearing similar structure motifs to norvaline a highly selective binding to the racemate rather than enantiomerand remarkably suppress nucleation of DL-norvaline, the key factor determining the resultantenantiomer purity and separation efficiency. The underly inhibition principle was revealed due to thecentrosymmetric packing of the racemate while the polarity of enantiomer leads to only partial or slightcrystallization suppression. The interesting inhibition mode by tailor-made additives is also believed tobe applicable for other racemic crystallization systems. Our established additive-assisted preferentialcrystallization has showed great potential in the development of separation technology and resolutionof enantiomer from racemic compounds.