Dear Editor,This letter proposes a dynamic switching soft slicing strategy for industrial mixed traffic in 5G networks. Considering two types of traffic, periodic delay-sensitive (PDS) traffic and sporadic delay-toler...Dear Editor,This letter proposes a dynamic switching soft slicing strategy for industrial mixed traffic in 5G networks. Considering two types of traffic, periodic delay-sensitive (PDS) traffic and sporadic delay-tolerant (SDT) traffic, we design a dynamic switching strategy based on a traffic-Qo S-aware soft slicing (TQASS) scheme and a resource-efficiency-aware soft slicing (REASS) scheme.展开更多
Dear Editor,This letter presents a joint probabilistic scheduling and resource allocation method(PSRA) for 5G-based wireless networked control systems(WNCSs). As a control-aware optimization method, PSRA minimizes the...Dear Editor,This letter presents a joint probabilistic scheduling and resource allocation method(PSRA) for 5G-based wireless networked control systems(WNCSs). As a control-aware optimization method, PSRA minimizes the linear quadratic Gaussian(LQG) control cost of WNCSs by optimizing the activation probability of subsystems, the number of uplink repetitions, and the durations of uplink and downlink phases. Simulation results show that PSRA achieves smaller LQG control costs than existing works.展开更多
The correlation between hydrogen absorption capacity(HAC)and the micro structure of Sm_(26.2)Co_(bal)Fe_(x)Cu_(4.0)Zr_(2.3)(x=23 wt%,25 wt%,27 wt%,30 wt%)ingots and cast strips was systematically investigated.As the t...The correlation between hydrogen absorption capacity(HAC)and the micro structure of Sm_(26.2)Co_(bal)Fe_(x)Cu_(4.0)Zr_(2.3)(x=23 wt%,25 wt%,27 wt%,30 wt%)ingots and cast strips was systematically investigated.As the temperature rises from 373 to 423 K,the activation time,hydrogen absorption time and HAC of the Sm_(26.2)Co_(bal)Fe_(23)Cu_(4.0)Zr_(2.3)ingot decrease by 14.4%,14.1%,and 19.3%,respectively.Dispersed 1:5phase provides more channels for hydrogen diffusion,which is the main reason that HAC increases with the x increasing.The HAC of the same compound strips increases as the particles size of the pre-crushed decreases.However,no further embrittlement behavior appears in pre-crushed strips,which reaches an equal HAC as ingots.Micro-computerized tomography reveals that ingots contain small spherical-like holes and large flake micro-cracks,whereas strips mainly contain elliptical pores.The effects of grain size and inner defects size on structure stability were invested by Abaqus.Simulation results reveal that the superior embrittlement behavior of the ingots is predominantly influenced by the presence of large flake-like micro-cracks.展开更多
In this work,a small amount of Al_(2)O_(3)powders(≤0.3 wt%)were incorporated into the Sm_(2)Co_(17)-type sin-tered magnets,obtaining both high mechanical and magnetic properties.It is found that 0.1%weight percentage...In this work,a small amount of Al_(2)O_(3)powders(≤0.3 wt%)were incorporated into the Sm_(2)Co_(17)-type sin-tered magnets,obtaining both high mechanical and magnetic properties.It is found that 0.1%weight percentage of Al_(2)O_(3)doping is enough to enhance the flexural strength by about 20%(∼180 MPa for the case of the c-axis parallel to height).Meanwhile,the(BH)max remains around 219 kJ/m^(3),and Hcj is 2052 kA/m,which is over 95%of that of the original magnets without doping.The promising improvement in flexural strength is mainly attributed to the grain size effective refinement caused by Sm_(2)O_(3)particles including newly-formed ones from the reaction of the Al_(2)O_(3)powder and Sm in the matrix.Furthermore,the grain size of the magnets decreases significantly with increasing of Al_(2)O_(3)doping up to 0.3 wt%.Espe-cially,the grain size of 0.3 wt%Al_(2)O_(3)doped magnets is refined by 37%.However,the flexural strengths(for the c-axis parallel to height and the c-axis parallel to width cases)of the magnets decrease sequen-tially and are even lower than that of the original magnet.The microstructure investigations indicate that the decrease in flexural strength may closely be correlated to the larger cell size and the incomplete cell boundaries phase.The obtained results infer that the flexural strength is susceptible to not only grain size but also the cellular structure of the magnets.展开更多
汽车内饰的静电吸尘影响车内环境和车内仪器仪表的使用寿命。通过熔融共混的方法制备了汽车内饰用永久抗静电PP材料,从4种导电炭黑中选择一种颗粒状导电炭黑,添加量为18%(质量比),永久抗静电PP表面电阻可达1×106Ω,且无虎皮纹等外...汽车内饰的静电吸尘影响车内环境和车内仪器仪表的使用寿命。通过熔融共混的方法制备了汽车内饰用永久抗静电PP材料,从4种导电炭黑中选择一种颗粒状导电炭黑,添加量为18%(质量比),永久抗静电PP表面电阻可达1×106Ω,且无虎皮纹等外观问题。随着高熔体流动速率PP(K7100)用量的增加,材料的熔体流动速率、拉伸强度、弯曲模量均呈上升趋势,但悬臂梁缺口冲击强度明显下降,由26 k J/m2下降到13 k J/m2。采用多孔硅酸盐作为VOC吸附剂,使永久抗静电PP的乙醛和丙烯醛释放量明显减少,但对于苯系物基本没有效果。当VOC吸附剂添加量达到1. 5%(质量比)时,改性PP的VOC满足主机厂的标准要求。永久抗静电PP注塑生产的汽车内饰门板,在试装车路试过程中,零件的灰尘量得到显著降低。展开更多
基金supported by the Liaoning Revitalization Talents Program(XLYC2203148)
文摘Dear Editor,This letter proposes a dynamic switching soft slicing strategy for industrial mixed traffic in 5G networks. Considering two types of traffic, periodic delay-sensitive (PDS) traffic and sporadic delay-tolerant (SDT) traffic, we design a dynamic switching strategy based on a traffic-Qo S-aware soft slicing (TQASS) scheme and a resource-efficiency-aware soft slicing (REASS) scheme.
基金supported by the Liaoning Revitalization Talents Program(XLYC2203148)
文摘Dear Editor,This letter presents a joint probabilistic scheduling and resource allocation method(PSRA) for 5G-based wireless networked control systems(WNCSs). As a control-aware optimization method, PSRA minimizes the linear quadratic Gaussian(LQG) control cost of WNCSs by optimizing the activation probability of subsystems, the number of uplink repetitions, and the durations of uplink and downlink phases. Simulation results show that PSRA achieves smaller LQG control costs than existing works.
基金Project supported by the National Key Research and Development Program of China(2022YFB3505303,2021YFB3503100,2021YFB3501500)the Major Projects in Inner Mongolia Autonomous Region of China(2021ZD0035)。
文摘The correlation between hydrogen absorption capacity(HAC)and the micro structure of Sm_(26.2)Co_(bal)Fe_(x)Cu_(4.0)Zr_(2.3)(x=23 wt%,25 wt%,27 wt%,30 wt%)ingots and cast strips was systematically investigated.As the temperature rises from 373 to 423 K,the activation time,hydrogen absorption time and HAC of the Sm_(26.2)Co_(bal)Fe_(23)Cu_(4.0)Zr_(2.3)ingot decrease by 14.4%,14.1%,and 19.3%,respectively.Dispersed 1:5phase provides more channels for hydrogen diffusion,which is the main reason that HAC increases with the x increasing.The HAC of the same compound strips increases as the particles size of the pre-crushed decreases.However,no further embrittlement behavior appears in pre-crushed strips,which reaches an equal HAC as ingots.Micro-computerized tomography reveals that ingots contain small spherical-like holes and large flake micro-cracks,whereas strips mainly contain elliptical pores.The effects of grain size and inner defects size on structure stability were invested by Abaqus.Simulation results reveal that the superior embrittlement behavior of the ingots is predominantly influenced by the presence of large flake-like micro-cracks.
基金supported by the National Key Research and Development Program of China(Nos.2021YFB3503100,2022YFB3505303,2021YFB3501500)the Major Projects in the Inner Mongolia Autonomous Region of China.
文摘In this work,a small amount of Al_(2)O_(3)powders(≤0.3 wt%)were incorporated into the Sm_(2)Co_(17)-type sin-tered magnets,obtaining both high mechanical and magnetic properties.It is found that 0.1%weight percentage of Al_(2)O_(3)doping is enough to enhance the flexural strength by about 20%(∼180 MPa for the case of the c-axis parallel to height).Meanwhile,the(BH)max remains around 219 kJ/m^(3),and Hcj is 2052 kA/m,which is over 95%of that of the original magnets without doping.The promising improvement in flexural strength is mainly attributed to the grain size effective refinement caused by Sm_(2)O_(3)particles including newly-formed ones from the reaction of the Al_(2)O_(3)powder and Sm in the matrix.Furthermore,the grain size of the magnets decreases significantly with increasing of Al_(2)O_(3)doping up to 0.3 wt%.Espe-cially,the grain size of 0.3 wt%Al_(2)O_(3)doped magnets is refined by 37%.However,the flexural strengths(for the c-axis parallel to height and the c-axis parallel to width cases)of the magnets decrease sequen-tially and are even lower than that of the original magnet.The microstructure investigations indicate that the decrease in flexural strength may closely be correlated to the larger cell size and the incomplete cell boundaries phase.The obtained results infer that the flexural strength is susceptible to not only grain size but also the cellular structure of the magnets.
文摘汽车内饰的静电吸尘影响车内环境和车内仪器仪表的使用寿命。通过熔融共混的方法制备了汽车内饰用永久抗静电PP材料,从4种导电炭黑中选择一种颗粒状导电炭黑,添加量为18%(质量比),永久抗静电PP表面电阻可达1×106Ω,且无虎皮纹等外观问题。随着高熔体流动速率PP(K7100)用量的增加,材料的熔体流动速率、拉伸强度、弯曲模量均呈上升趋势,但悬臂梁缺口冲击强度明显下降,由26 k J/m2下降到13 k J/m2。采用多孔硅酸盐作为VOC吸附剂,使永久抗静电PP的乙醛和丙烯醛释放量明显减少,但对于苯系物基本没有效果。当VOC吸附剂添加量达到1. 5%(质量比)时,改性PP的VOC满足主机厂的标准要求。永久抗静电PP注塑生产的汽车内饰门板,在试装车路试过程中,零件的灰尘量得到显著降低。
