The equivalent circuit with complex physical constants for a piezoelectric ceramic in thickness mode is established. In the equivalent circuit, electric components （equivalent circuit parameters） are connected to re...The equivalent circuit with complex physical constants for a piezoelectric ceramic in thickness mode is established. In the equivalent circuit, electric components （equivalent circuit parameters） are connected to real and imaginary parts of complex physical coefficients of piezoelectric materials. Based on definitions of dissipation factors, three of them （dielectric, elastic and piezoelectric dissipation factors） are represented by equivalent circuit parameters. Since the equivalent circuit parameters are detectable, the dissipation factors can be easily obtained. In the experiments, the temperature and the stress responses of the three dissipation factors are measured.展开更多
In this issue of Journal of Biomedical Research,3review articles are published that cover a broad range of topics addressing current understanding on regulation of nutrient metabolism through protein phosphatases,home...In this issue of Journal of Biomedical Research,3review articles are published that cover a broad range of topics addressing current understanding on regulation of nutrient metabolism through protein phosphatases,homeostatic regulation of cellular lipid droplets by small GTPases,and mechanisms by which hepatic assembly and secretion of triglyceride-rich lipoproteins are regulated.展开更多
针对低压交流配电系统中复杂支路串联电弧故障检测困难、易引发电气火灾的挑战,提出了基于马尔可夫变迁场与可变形自引导Transformer(Markov transition field and deformable convolutional self-guided transformer,MTF-DSGT)的检测...针对低压交流配电系统中复杂支路串联电弧故障检测困难、易引发电气火灾的挑战,提出了基于马尔可夫变迁场与可变形自引导Transformer(Markov transition field and deformable convolutional self-guided transformer,MTF-DSGT)的检测方案。利用马尔可夫变迁场将一维电流信号转换为图像,融合可变形卷积网络(deformable convolutional network,DCN)提取局部特征及自引导Transformer捕捉全局信息,以提高故障识别精度。实验结果显示,该方案在复杂支路电路中检测准确率达99.88%,在Jetson Orin Nano平台测试耗时仅7.78 ms。该方案能高效辨识串联电弧故障,具备实时处理能力,适合边缘设备部署。展开更多
On the basis of analyzing and testing of common inverting circuits, a new type inverter, which has a special inverting circuit called complex isolated, has been put forward. In turn, an applicable air plasma cutting ...On the basis of analyzing and testing of common inverting circuits, a new type inverter, which has a special inverting circuit called complex isolated, has been put forward. In turn, an applicable air plasma cutting machine has also been put into use. Testing results show that this kind inverter has lots of properties as high reliability, high efficiency, good EMC(electromagnetic compatibility) and easy operating. The complex isolated inverting circuit can be considered as a quite valuable reference for the research of high power welding inverter.展开更多
This work proposes quantum circuit complexity—the minimal number of elementary operations needed to implement a quantum transformation—be established as a legitimate physical observable. We prove that circuit comple...This work proposes quantum circuit complexity—the minimal number of elementary operations needed to implement a quantum transformation—be established as a legitimate physical observable. We prove that circuit complexity satisfies all requirements for physical observables, including self-adjointness, gauge invariance, and a consistent measurement theory with well-defined uncertainty relations. We develop complete protocols for measuring complexity in quantum systems and demonstrate its connections to gauge theory and quantum gravity. Our results suggest that computational requirements may constitute physical laws as fundamental as energy conservation. This framework grants insights into the relationship between quantum information, gravity, and the emergence of spacetime geometry while offering practical methods for experimental verification. Our results indicate that the physical universe may be governed by both energetic and computational constraints, with profound implications for our understanding of fundamental physics.展开更多
基金Project supported by the National Natural Science Foundation of China （Grant No 50278098）.
文摘The equivalent circuit with complex physical constants for a piezoelectric ceramic in thickness mode is established. In the equivalent circuit, electric components （equivalent circuit parameters） are connected to real and imaginary parts of complex physical coefficients of piezoelectric materials. Based on definitions of dissipation factors, three of them （dielectric, elastic and piezoelectric dissipation factors） are represented by equivalent circuit parameters. Since the equivalent circuit parameters are detectable, the dissipation factors can be easily obtained. In the experiments, the temperature and the stress responses of the three dissipation factors are measured.
文摘In this issue of Journal of Biomedical Research,3review articles are published that cover a broad range of topics addressing current understanding on regulation of nutrient metabolism through protein phosphatases,homeostatic regulation of cellular lipid droplets by small GTPases,and mechanisms by which hepatic assembly and secretion of triglyceride-rich lipoproteins are regulated.
文摘针对低压交流配电系统中复杂支路串联电弧故障检测困难、易引发电气火灾的挑战,提出了基于马尔可夫变迁场与可变形自引导Transformer(Markov transition field and deformable convolutional self-guided transformer,MTF-DSGT)的检测方案。利用马尔可夫变迁场将一维电流信号转换为图像,融合可变形卷积网络(deformable convolutional network,DCN)提取局部特征及自引导Transformer捕捉全局信息,以提高故障识别精度。实验结果显示,该方案在复杂支路电路中检测准确率达99.88%,在Jetson Orin Nano平台测试耗时仅7.78 ms。该方案能高效辨识串联电弧故障,具备实时处理能力,适合边缘设备部署。
文摘On the basis of analyzing and testing of common inverting circuits, a new type inverter, which has a special inverting circuit called complex isolated, has been put forward. In turn, an applicable air plasma cutting machine has also been put into use. Testing results show that this kind inverter has lots of properties as high reliability, high efficiency, good EMC(electromagnetic compatibility) and easy operating. The complex isolated inverting circuit can be considered as a quite valuable reference for the research of high power welding inverter.
文摘This work proposes quantum circuit complexity—the minimal number of elementary operations needed to implement a quantum transformation—be established as a legitimate physical observable. We prove that circuit complexity satisfies all requirements for physical observables, including self-adjointness, gauge invariance, and a consistent measurement theory with well-defined uncertainty relations. We develop complete protocols for measuring complexity in quantum systems and demonstrate its connections to gauge theory and quantum gravity. Our results suggest that computational requirements may constitute physical laws as fundamental as energy conservation. This framework grants insights into the relationship between quantum information, gravity, and the emergence of spacetime geometry while offering practical methods for experimental verification. Our results indicate that the physical universe may be governed by both energetic and computational constraints, with profound implications for our understanding of fundamental physics.
