To achieve an on-demand and dynamic composition model of inter-organizational business processes, a new approach for business process modeling and verification is introduced by using the pi-calculus theory. A new busi...To achieve an on-demand and dynamic composition model of inter-organizational business processes, a new approach for business process modeling and verification is introduced by using the pi-calculus theory. A new business process model which is multi-role, multi-dimensional, integrated and dynamic is proposed relying on inter-organizational collaboration. Compatible with the traditional linear sequence model, the new model is an M x N multi-dimensional mesh, and provides horizontal and vertical formal descriptions for the collaboration business process model. Finally, the pi-calculus theory is utilized to verify the deadlocks, livelocks and synchronization of the example models. The result shows that the proposed approach is efficient and applicable in inter-organizational business process modeling.展开更多
The social organization of marked Helmeted Guineafowl(Numida meleagris) was studied in the Krugersdorp Game Reserve(Gauteng Province,South Africa) during March 1982 to February 1984.Flock members(7-10 guineafowl) did ...The social organization of marked Helmeted Guineafowl(Numida meleagris) was studied in the Krugersdorp Game Reserve(Gauteng Province,South Africa) during March 1982 to February 1984.Flock members(7-10 guineafowl) did not associate randomly.Helmeted Guineafowl must live in a sociable flock to survive in the wild.The highest ranking male(male A) formed the pivot of the daily activities of the flock,such as determining foraging direction.High ranking males(males A and B) associated closely to repulse conspecific intruders.Breeding females associated more often with the high ranking males during the breeding season.Although a pecking order was established among males,the frequency of agonistic actions within the flock was very low,which suggests that agonistic interactions are limited to maintain cohesion.Adult females remained between the dominant male and the juveniles to minimize victimization.The second highest ranking male(B) took center stage while the dominant male and his female left temporarily to breed and then the rest of the flock clustered around him to maintain the cohesive nature of the flock.Most adults assisted with the brooding of the chicks of the highest ranking male.Flocking is,among other functions,a predator surveillance strategy that enables the Helmeted Guineafowl to forage under conditions with very limited ground cover and to maximize food finding during winter.展开更多
To solve the contradiction between the increasing demand of diverse vehicular wireless applications and the shortage of spectrum resource, a novel cognitive cooperative vehicular ad-hoc network （CC- VANET） framework...To solve the contradiction between the increasing demand of diverse vehicular wireless applications and the shortage of spectrum resource, a novel cognitive cooperative vehicular ad-hoc network （CC- VANET） framework is proposed in this paper. Firstly, we develop an adaptive cognitive spectrum sensing （ACSS） mechanism which can help to trigger and adjust the spectrum sensing window according to network traffic load status and communication quality. And then, Generalized Nash Bargaining SoLution （GNBS）, which can achieve a good tradeoff between efficiency and weighted fairness, is proposed to formulate the asymmetric inter- cell resource allocation. Finally, GNBS- Safety （GNBS-S） scheme is developed to enhance the Quality of Service （QoS） of safety applications, especially in the heavy load status, where the bandwidth demanded and supplied cannot be matched well. Furthermore, the primary user activity （PUA） which can cause rate loss to secondary users, is also considered to alleviate its influence to fairness. Simulation results indicate that the proposed CC-VANET scheme can greatly improve the spectrum efficiency and reduce the transmission delay and packet loss rate on the heavy contention status. And GNBS spectrum allocation scheme outperforms both the Max-rain and Max-rate schemes, and canenhance the communication reliability of safety service considerably in CC-VANET.展开更多
As the manufacturing mode focuses more on network and community,the orders and production processes are becoming highly dynamic and unpredictable.The traditional manufacturing system cannot handle those exceptional ev...As the manufacturing mode focuses more on network and community,the orders and production processes are becoming highly dynamic and unpredictable.The traditional manufacturing system cannot handle those exceptional events such as rush orders and machine breakdowns.Nevertheless,the multiagent manufacturing system(MAMS)becomes a critical pattern to deal with these disturbances in a real-time way.However,due to the lack of universality,MAMS is difficult to be applied to industrial sites.A new multiagent architecture and the relay cooperation model based on a positive process relation matrix are proposed to address this paper’s issue.An optimized contract net protocol(CNP)-based negotiation mechanism is developed to improve the efficiency of collaboration in the proposed architecture.Finally,a case study of self-organizing internet of things(Io T)manufacturing system is used to test the feasibility and effectiveness of the method.It is shown that the proposed self-organizing Io T manufacturing mode outperforms the traditional manufacturing system in terms of makespan and critical machine workload balancing under disturbances through comparison.展开更多
This paper considers a stage-structured three species model with intra-guild predation and disturbing pulse. Sufficient conditions which guarantee the global attractivity of boundary periodic solution and permanence o...This paper considers a stage-structured three species model with intra-guild predation and disturbing pulse. Sufficient conditions which guarantee the global attractivity of boundary periodic solution and permanence of the system are obtained. Our results show that the pulse and time delay bring great effect on the dynamical behaviors of the model.展开更多
Objective:The aim of this study was to evaluate the efficacy,adverse reaction and survival of MAID protocol as first-line treatment on 137 metastatic soft tissue sarcomas patients.Methods:One hundredand thirty-seven p...Objective:The aim of this study was to evaluate the efficacy,adverse reaction and survival of MAID protocol as first-line treatment on 137 metastatic soft tissue sarcomas patients.Methods:One hundredand thirty-seven patients with metastatic soft tissue sarcoma were given MAID protocol chemotherapy which consists of ifosfamide at a total dose of 8-10 g/m2 in 4-5 days,adriamycin at a dose of 60 mg/m2 on first day and dacarbazine at a dose of 200 mg/m2/d in 4-5 days.Twenty one days were regarded as a cycle and 2-6 cycles were completed.The median cycle number was 4.Results:Four cases had complete remission(CR)(2.9%),thirteen cases achieved partial remission(PR)(9.5%),eighty-eight cases maintained a stable disease(SD)(64.2%),and thirty-two cases had progressive disease(PD)(23.4%).The overall response rate(RR) was 12.4%,disease control rate(DCR) was 76.6%.The progression-free survival(PFS) was 2-14 months and median PFS was 5.00 ± 1.12 months.The overall survival(OS) was 3-19 months and median OS was 8.00 ± 1.32 months.Three months PFS rate was 56.9%,six months PFS rate was 27.2% and one year PFS rate was 7.8%.Three months OS rate was 100.0%,six months OS rate was 41.5% and one year OS rate was 10.7%.The main adverse reactions were bone marrow supression,nausea/vomiting and alopecia.Other adverse reactions were seldom observed.Conclusion:The effect of MAID protocol as first-line treatment on metastatic soft tissue sarcomas patients was exact,the treatment can control disease progression effectively and the side effects can be tolerable.It was obviously very worthy in clinical use as one of the first-line chemotherapy protocols on advanced soft tissue sarcomas.展开更多
With the aim of drawing valuable lessons for the management and planning of similar business transformation initiatives, this paper critically evaluates a change project at an organization in South Africa, from three ...With the aim of drawing valuable lessons for the management and planning of similar business transformation initiatives, this paper critically evaluates a change project at an organization in South Africa, from three inter-woven dimensions： creating the climate for change, engaging and enabling the organization, and sustaining change. Firstly, a key achievement demonstrates that attempts to create a conducive climate for change should recognize that the unit of change in any organization is, ultimately, the individual. Levers for such initiatives should navigate the macro-organizational change narrative and translate change generalities into specific individual actions and behaviors. Secondly, learning from an implementation gap, similar efforts would gain better traction in engagement and empowerment by leveraging on an influential cross-functional team made up of enthusiastic supporters of the required change, to foster ownership and to embrace change across the organization. Key characteristics that should be represented on the team include leadership skills, expertise, credibility, effective communication, and a sense of urgency. Thirdly, in terms of sustaining change, twin lessons surge to the fore. On a positive note, by progressing its values-set into an annual staff award, there is a pointer to the potential of innovatively encouraging and rewarding employees to live the value qualities. And, on the flip side, a need is underscore of the critical role of seamless executive leadership, providing ongoing co-creating windows for instilling positive attitudes and creating synergies among related strategic initiatives.展开更多
基金The National Natural Science Foundation of China(No60473078)
文摘To achieve an on-demand and dynamic composition model of inter-organizational business processes, a new approach for business process modeling and verification is introduced by using the pi-calculus theory. A new business process model which is multi-role, multi-dimensional, integrated and dynamic is proposed relying on inter-organizational collaboration. Compatible with the traditional linear sequence model, the new model is an M x N multi-dimensional mesh, and provides horizontal and vertical formal descriptions for the collaboration business process model. Finally, the pi-calculus theory is utilized to verify the deadlocks, livelocks and synchronization of the example models. The result shows that the proposed approach is efficient and applicable in inter-organizational business process modeling.
文摘The social organization of marked Helmeted Guineafowl(Numida meleagris) was studied in the Krugersdorp Game Reserve(Gauteng Province,South Africa) during March 1982 to February 1984.Flock members(7-10 guineafowl) did not associate randomly.Helmeted Guineafowl must live in a sociable flock to survive in the wild.The highest ranking male(male A) formed the pivot of the daily activities of the flock,such as determining foraging direction.High ranking males(males A and B) associated closely to repulse conspecific intruders.Breeding females associated more often with the high ranking males during the breeding season.Although a pecking order was established among males,the frequency of agonistic actions within the flock was very low,which suggests that agonistic interactions are limited to maintain cohesion.Adult females remained between the dominant male and the juveniles to minimize victimization.The second highest ranking male(B) took center stage while the dominant male and his female left temporarily to breed and then the rest of the flock clustered around him to maintain the cohesive nature of the flock.Most adults assisted with the brooding of the chicks of the highest ranking male.Flocking is,among other functions,a predator surveillance strategy that enables the Helmeted Guineafowl to forage under conditions with very limited ground cover and to maximize food finding during winter.
基金supported in part by program for National Natural Science Foundation of China under Grant No.61271184863 Program of China under Grant No.2013AA013301+1 种基金New Century Excellent Talents in University(NCET-11-0594)Open Fund of the State Key Laboratory of Integrated Services Networks(No.ISN12-03)
文摘To solve the contradiction between the increasing demand of diverse vehicular wireless applications and the shortage of spectrum resource, a novel cognitive cooperative vehicular ad-hoc network （CC- VANET） framework is proposed in this paper. Firstly, we develop an adaptive cognitive spectrum sensing （ACSS） mechanism which can help to trigger and adjust the spectrum sensing window according to network traffic load status and communication quality. And then, Generalized Nash Bargaining SoLution （GNBS）, which can achieve a good tradeoff between efficiency and weighted fairness, is proposed to formulate the asymmetric inter- cell resource allocation. Finally, GNBS- Safety （GNBS-S） scheme is developed to enhance the Quality of Service （QoS） of safety applications, especially in the heavy load status, where the bandwidth demanded and supplied cannot be matched well. Furthermore, the primary user activity （PUA） which can cause rate loss to secondary users, is also considered to alleviate its influence to fairness. Simulation results indicate that the proposed CC-VANET scheme can greatly improve the spectrum efficiency and reduce the transmission delay and packet loss rate on the heavy contention status. And GNBS spectrum allocation scheme outperforms both the Max-rain and Max-rate schemes, and canenhance the communication reliability of safety service considerably in CC-VANET.
基金supported by the National Key Research and Development Program of China(No.2018YFE0177000)National Natural Science Foundation of China(No.52075257)+1 种基金Equipment Project of Ship Assembly and Construction for the Ministry of Industry and Information Technology(No.TC190H47J)Fundamental Research Funds for the Central Universities(No.NP2020304)。
文摘As the manufacturing mode focuses more on network and community,the orders and production processes are becoming highly dynamic and unpredictable.The traditional manufacturing system cannot handle those exceptional events such as rush orders and machine breakdowns.Nevertheless,the multiagent manufacturing system(MAMS)becomes a critical pattern to deal with these disturbances in a real-time way.However,due to the lack of universality,MAMS is difficult to be applied to industrial sites.A new multiagent architecture and the relay cooperation model based on a positive process relation matrix are proposed to address this paper’s issue.An optimized contract net protocol(CNP)-based negotiation mechanism is developed to improve the efficiency of collaboration in the proposed architecture.Finally,a case study of self-organizing internet of things(Io T)manufacturing system is used to test the feasibility and effectiveness of the method.It is shown that the proposed self-organizing Io T manufacturing mode outperforms the traditional manufacturing system in terms of makespan and critical machine workload balancing under disturbances through comparison.
基金Foundation item： Supported by the National Natural Science Foundation of China（10771179）
文摘This paper considers a stage-structured three species model with intra-guild predation and disturbing pulse. Sufficient conditions which guarantee the global attractivity of boundary periodic solution and permanence of the system are obtained. Our results show that the pulse and time delay bring great effect on the dynamical behaviors of the model.
文摘Objective:The aim of this study was to evaluate the efficacy,adverse reaction and survival of MAID protocol as first-line treatment on 137 metastatic soft tissue sarcomas patients.Methods:One hundredand thirty-seven patients with metastatic soft tissue sarcoma were given MAID protocol chemotherapy which consists of ifosfamide at a total dose of 8-10 g/m2 in 4-5 days,adriamycin at a dose of 60 mg/m2 on first day and dacarbazine at a dose of 200 mg/m2/d in 4-5 days.Twenty one days were regarded as a cycle and 2-6 cycles were completed.The median cycle number was 4.Results:Four cases had complete remission(CR)(2.9%),thirteen cases achieved partial remission(PR)(9.5%),eighty-eight cases maintained a stable disease(SD)(64.2%),and thirty-two cases had progressive disease(PD)(23.4%).The overall response rate(RR) was 12.4%,disease control rate(DCR) was 76.6%.The progression-free survival(PFS) was 2-14 months and median PFS was 5.00 ± 1.12 months.The overall survival(OS) was 3-19 months and median OS was 8.00 ± 1.32 months.Three months PFS rate was 56.9%,six months PFS rate was 27.2% and one year PFS rate was 7.8%.Three months OS rate was 100.0%,six months OS rate was 41.5% and one year OS rate was 10.7%.The main adverse reactions were bone marrow supression,nausea/vomiting and alopecia.Other adverse reactions were seldom observed.Conclusion:The effect of MAID protocol as first-line treatment on metastatic soft tissue sarcomas patients was exact,the treatment can control disease progression effectively and the side effects can be tolerable.It was obviously very worthy in clinical use as one of the first-line chemotherapy protocols on advanced soft tissue sarcomas.
文摘With the aim of drawing valuable lessons for the management and planning of similar business transformation initiatives, this paper critically evaluates a change project at an organization in South Africa, from three inter-woven dimensions： creating the climate for change, engaging and enabling the organization, and sustaining change. Firstly, a key achievement demonstrates that attempts to create a conducive climate for change should recognize that the unit of change in any organization is, ultimately, the individual. Levers for such initiatives should navigate the macro-organizational change narrative and translate change generalities into specific individual actions and behaviors. Secondly, learning from an implementation gap, similar efforts would gain better traction in engagement and empowerment by leveraging on an influential cross-functional team made up of enthusiastic supporters of the required change, to foster ownership and to embrace change across the organization. Key characteristics that should be represented on the team include leadership skills, expertise, credibility, effective communication, and a sense of urgency. Thirdly, in terms of sustaining change, twin lessons surge to the fore. On a positive note, by progressing its values-set into an annual staff award, there is a pointer to the potential of innovatively encouraging and rewarding employees to live the value qualities. And, on the flip side, a need is underscore of the critical role of seamless executive leadership, providing ongoing co-creating windows for instilling positive attitudes and creating synergies among related strategic initiatives.
