Two waves of technology are dramatically changing daily life:cloud computing and mobile phones.New cloud computing services such as webmail and content rich data search have emerged.However,in order to use these servi...Two waves of technology are dramatically changing daily life:cloud computing and mobile phones.New cloud computing services such as webmail and content rich data search have emerged.However,in order to use these services,a mobile phone must be able to run new applications and handle high network bandwidth.Worldwide,about 3.45 billion mobile phones are low end phones;they have low bandwidth and cannot run new applications.Because of this technology gap,most mobile users are unable to experience cloud computing services with their thumbs.In this paper,a novel platform,Thumb-in-Cloud,is proposed to bridge this gap.Thumb-in-Cloud consists of two subsystems:Thumb-Machine and Thumb-Gateways.Thumb-Machine is a virtual machine built into a low end phone to enable it to run new applications.Thumb-Gateways can tailor cloud computing services by reformatting and compressing the service to fit the phone's profile.展开更多
We herein report the effective performance enhancement of the pentacene-based organic thin film transistors with silicon di- oxide dielectric by inserting a thin metal phthalocyanines interlayer between Au source/drai...We herein report the effective performance enhancement of the pentacene-based organic thin film transistors with silicon di- oxide dielectric by inserting a thin metal phthalocyanines interlayer between Au source/drain electrodes and the pentacene active layer. The threshold voltage decreased remarkably from ca. -20 V to a few volts （below -7.6 V） while the mobility in- creased 1.5-3 times after the insertion of the interlayer of only ca. 2 nm, which could be attributed to the reduction of the car- tier injection barrier. The results suggest a simple and effective way to achieve low-threshold-voltage pentacene-based organic thin film transistors with high mobility on silicon dioxide dielectric.展开更多
Puncturing has been recognized as a promising technology to cope with the coexistence problem of enhanced mobile broadband(eMBB) and ultra-reliable low latency communications(URLLC)traffic. However, the steady perform...Puncturing has been recognized as a promising technology to cope with the coexistence problem of enhanced mobile broadband(eMBB) and ultra-reliable low latency communications(URLLC)traffic. However, the steady performance of eMBB traffic while meeting the requirements of URLLC traffic with puncturing is a major challenge in some realistic scenarios. In this paper, we pay attention to the timely and energy-efficient processing for eMBB traffic in the industrial Internet of Things(IIoT), where mobile edge computing(MEC) is employed for data processing. Specifically, the performance of eMBB traffic and URLLC traffic in a MEC-based IIoT system is ensured by setting the threshold of tolerable delay and outage probability, respectively. Furthermore,considering the limited energy supply, an energy minimization problem of eMBB device is formulated under the above constraints, by jointly optimizing the resource blocks(RBs) punctured by URLLC traffic, data offloading and transmit power of eMBB device. With Markov's inequality, the problem is reformulated by transforming the probabilistic outage constraint into a deterministic constraint. Meanwhile, an iterative energy minimization algorithm(IEMA) is proposed.Simulation results demonstrate that our algorithm has a significant reduction in the energy consumption for eMBB device and achieves a better overall effect compared to several benchmarks.展开更多
基金supported by CityU Applied Research Grant(ARG)under Grant No.9667033Shenzhen Basic Research Grant under No.JC200903170456A+3 种基金Shenzhen-HK Innovation Cycle Grant under No.ZYB200907080078ARGC General Research Fund(GRF),HK SAR under Grant No.CityU 114609CityU Applied R&D Centre(ARD(Ctr))under Grant No.9681001China NSF under Grant No.61070222/F020802
文摘Two waves of technology are dramatically changing daily life:cloud computing and mobile phones.New cloud computing services such as webmail and content rich data search have emerged.However,in order to use these services,a mobile phone must be able to run new applications and handle high network bandwidth.Worldwide,about 3.45 billion mobile phones are low end phones;they have low bandwidth and cannot run new applications.Because of this technology gap,most mobile users are unable to experience cloud computing services with their thumbs.In this paper,a novel platform,Thumb-in-Cloud,is proposed to bridge this gap.Thumb-in-Cloud consists of two subsystems:Thumb-Machine and Thumb-Gateways.Thumb-Machine is a virtual machine built into a low end phone to enable it to run new applications.Thumb-Gateways can tailor cloud computing services by reformatting and compressing the service to fit the phone's profile.
基金financially supported by the National Basic Research Program of China (973 Program) (Grant No. 2007CB936302)the National Natural Science Foundation of China (Grant No. 20833002)
文摘We herein report the effective performance enhancement of the pentacene-based organic thin film transistors with silicon di- oxide dielectric by inserting a thin metal phthalocyanines interlayer between Au source/drain electrodes and the pentacene active layer. The threshold voltage decreased remarkably from ca. -20 V to a few volts （below -7.6 V） while the mobility in- creased 1.5-3 times after the insertion of the interlayer of only ca. 2 nm, which could be attributed to the reduction of the car- tier injection barrier. The results suggest a simple and effective way to achieve low-threshold-voltage pentacene-based organic thin film transistors with high mobility on silicon dioxide dielectric.
基金supported by the Natural Science Foundation of China (No.62171051)。
文摘Puncturing has been recognized as a promising technology to cope with the coexistence problem of enhanced mobile broadband(eMBB) and ultra-reliable low latency communications(URLLC)traffic. However, the steady performance of eMBB traffic while meeting the requirements of URLLC traffic with puncturing is a major challenge in some realistic scenarios. In this paper, we pay attention to the timely and energy-efficient processing for eMBB traffic in the industrial Internet of Things(IIoT), where mobile edge computing(MEC) is employed for data processing. Specifically, the performance of eMBB traffic and URLLC traffic in a MEC-based IIoT system is ensured by setting the threshold of tolerable delay and outage probability, respectively. Furthermore,considering the limited energy supply, an energy minimization problem of eMBB device is formulated under the above constraints, by jointly optimizing the resource blocks(RBs) punctured by URLLC traffic, data offloading and transmit power of eMBB device. With Markov's inequality, the problem is reformulated by transforming the probabilistic outage constraint into a deterministic constraint. Meanwhile, an iterative energy minimization algorithm(IEMA) is proposed.Simulation results demonstrate that our algorithm has a significant reduction in the energy consumption for eMBB device and achieves a better overall effect compared to several benchmarks.
