To achieve a sustainable development in the electronic and electrical equipment(EEE) industry, it is necessary to protect the available natural resources.In addition, to satisfy the increasing demand on EEE, it is nec...To achieve a sustainable development in the electronic and electrical equipment(EEE) industry, it is necessary to protect the available natural resources.In addition, to satisfy the increasing demand on EEE, it is necessary to provide alternative sources of raw materials.In this paper, laptops were imported to Jordan in 2011 as an example to show the potential recovery of metals and precious metals from high grade waste electronic and electrical equipment by conducting a mass flow rate analysis using the STAN program.The results show that considerable amounts of gold, silver, cobalt, palladium,and copper could be recovered.This will reduce the amounts needed from primary natural resources and offset the CO2 emissions produced from mining the primary raw material resources.展开更多
This paper presents the design of a computational software system that enables solutions of multi-phase and multi-scale problems in mechanics. It demonstrated how mechanicians can design “process-driven” software sy...This paper presents the design of a computational software system that enables solutions of multi-phase and multi-scale problems in mechanics. It demonstrated how mechanicians can design “process-driven” software systems directly, and that such efforts are more suitable in solving multi-phase or multi-scale problems, rather than utilizing the “data-driven” approaches of legacy network systems. Specifically, this paper demonstrates how this approach can be used to solve problems in flexible dynamics. Then it suggests a view of mechanics algorithms as ‘state equilibrium’ enforcers residing as servers, rather than as computer programs that solve field equations. It puts forth the need for identical input/output files to ensure widespread deployment on laptops. Then it presents an assessment of the laptop platform. A software system such as the one presented here can also be used to supply virtual environments, animations and entertainment/education software with physics.展开更多
Laptop computers are used more often than desktop computers, especially among graduate students. Many common laptop habits can have severe physiological effects on the user ranging from eye strain, poor posture, upper...Laptop computers are used more often than desktop computers, especially among graduate students. Many common laptop habits can have severe physiological effects on the user ranging from eye strain, poor posture, upper extremity pain, and overuse injuries. Thus, it is important to educate students on the best ergonomic position to use laptops. This study investigates the efficacy of a laptop ergonomic education session and its effects on graduate students’ knowledge and behaviors regarding proper laptop use. A convenience sample of control and experimental groups was used and consisted of 83 occupational therapy (OT), 63 physical therapy (PT), and 26 nurse anesthesia (NA) graduate students. The sample size was 172, with 94 graduate students in the control group and 78 graduate students in the experimental. All study participants completed an initial ergonomics questionnaire. The experimental group was given an ergonomics education session following the questionnaire. Approximately 4 weeks after both groups completed the initial questionnaire;a follow up questionnaire was administered. Results showed that subjects demonstrated a statistically significant improvement in ergonomics knowledge after they completed the ergonomic educational session. Some participants reported making adaptations to laptop positioning and equipment use following the educational session. Thus, participating in ergonomic education can positively influence awareness of body mechanics relative to laptop workstation design.展开更多
Functional testing is key to fulfill quality control in laptop manufacturing and is of great economic value.However,due to the unavailability of practical data,mathematical model and systematic perspective,it has bare...Functional testing is key to fulfill quality control in laptop manufacturing and is of great economic value.However,due to the unavailability of practical data,mathematical model and systematic perspective,it has barely been touched from the academic community to date.For the first time,this work provides technical understanding of the key principles of functional testing,mathematically models the general framework,elucidates existing testing strategy under the proposed framework and model,and finally proposes a specified optimization strategy which outperforms existing strategies.This work lays the model foundation for the further optimization of functional testing,and can be regarded as a good example of how a systematic approach can solve practical industrial challenges.展开更多
Huawei Launches PCs Running Homegrown Operating System Chinese tech giant Huawei unveiled two laptops powered by HarmonyOS on May 19,marking the debut of its homegrown operating system on personal computers(PCs).The l...Huawei Launches PCs Running Homegrown Operating System Chinese tech giant Huawei unveiled two laptops powered by HarmonyOS on May 19,marking the debut of its homegrown operating system on personal computers(PCs).The launch of the Huawei MateBook Pro and MateBook Fold Ultimate Design signals the company’s push to expand HarmonyOS beyond smartphones and tablets into a PC market long led by Microsoft’s Windows and Apple’s macOS.展开更多
In a crumbling tech hub near the marginal coastline,young Angolan developers,despite the challenges of unreliable Internet and dependence on foreign APIs(application programming interfaces),are tapping on donated lapt...In a crumbling tech hub near the marginal coastline,young Angolan developers,despite the challenges of unreliable Internet and dependence on foreign APIs(application programming interfaces),are tapping on donated laptops,debugging health apps that alert rural clinics of disease outbreaks.Their resilience and determination in the face of such obstacles are not just a source of innovation,but also of inspiration and hope.展开更多
针对笔记本电脑终端天线,提出了一种适用笔记本电脑无线局域网(Wireless Local Area Network,WLAN)的2.4 GHz、5 GHz、WiFi-6E的高隔离度多输入多输出(Multiple-input Multiple-output,MIMO)天线。为提高MIMO单元天线的端口隔离度,将一...针对笔记本电脑终端天线,提出了一种适用笔记本电脑无线局域网(Wireless Local Area Network,WLAN)的2.4 GHz、5 GHz、WiFi-6E的高隔离度多输入多输出(Multiple-input Multiple-output,MIMO)天线。为提高MIMO单元天线的端口隔离度,将一天线隔离枝节设置于笔记本电脑D壳溅镀层上,并且该天线的溅镀隔离枝节设置于MIMO单元天线之间。通过仿真和实测结果表明,该笔记本电脑WLAN天线在2412~2484 MHz、5150~5850 MHz和5925~7125 MHz内回波损耗均在-6 dB以下,天线效率≥-4.5 dB,隔离度<-20 dB。此外,该天线的溅镀隔离枝节结构简单,加工成本低,能广泛应用于笔记本电脑产品设计。展开更多
为有效预防电磁辐射对人体的危害,用频谱分析仪监测一个110 k V变电站和一个笔记本电脑的电场和磁场强度,分析典型工频设备电磁场的空间分布,评价电磁场对人体的影响,并提出相应的安全防护对策。研究结果表明:主变压器西侧的电场强度较...为有效预防电磁辐射对人体的危害,用频谱分析仪监测一个110 k V变电站和一个笔记本电脑的电场和磁场强度,分析典型工频设备电磁场的空间分布,评价电磁场对人体的影响,并提出相应的安全防护对策。研究结果表明:主变压器西侧的电场强度较强,并随距离增加而增大,但增大趋势逐渐变缓;磁场强度最强区分布在主变压器南侧,在该方向上呈现先增大后减小的规律。电源柜正对方位上的电场强度随距离呈幂指数衰减;磁场强度随距离呈对数衰减。而笔记本电脑的电磁场较强区分布在其前后方10 cm范围内,在该范围外均随距离增加而减小。长期处在电磁辐射环境中的工作人员应采取必要的安全防护措施,以免危害健康。展开更多
文摘To achieve a sustainable development in the electronic and electrical equipment(EEE) industry, it is necessary to protect the available natural resources.In addition, to satisfy the increasing demand on EEE, it is necessary to provide alternative sources of raw materials.In this paper, laptops were imported to Jordan in 2011 as an example to show the potential recovery of metals and precious metals from high grade waste electronic and electrical equipment by conducting a mass flow rate analysis using the STAN program.The results show that considerable amounts of gold, silver, cobalt, palladium,and copper could be recovered.This will reduce the amounts needed from primary natural resources and offset the CO2 emissions produced from mining the primary raw material resources.
文摘This paper presents the design of a computational software system that enables solutions of multi-phase and multi-scale problems in mechanics. It demonstrated how mechanicians can design “process-driven” software systems directly, and that such efforts are more suitable in solving multi-phase or multi-scale problems, rather than utilizing the “data-driven” approaches of legacy network systems. Specifically, this paper demonstrates how this approach can be used to solve problems in flexible dynamics. Then it suggests a view of mechanics algorithms as ‘state equilibrium’ enforcers residing as servers, rather than as computer programs that solve field equations. It puts forth the need for identical input/output files to ensure widespread deployment on laptops. Then it presents an assessment of the laptop platform. A software system such as the one presented here can also be used to supply virtual environments, animations and entertainment/education software with physics.
文摘Laptop computers are used more often than desktop computers, especially among graduate students. Many common laptop habits can have severe physiological effects on the user ranging from eye strain, poor posture, upper extremity pain, and overuse injuries. Thus, it is important to educate students on the best ergonomic position to use laptops. This study investigates the efficacy of a laptop ergonomic education session and its effects on graduate students’ knowledge and behaviors regarding proper laptop use. A convenience sample of control and experimental groups was used and consisted of 83 occupational therapy (OT), 63 physical therapy (PT), and 26 nurse anesthesia (NA) graduate students. The sample size was 172, with 94 graduate students in the control group and 78 graduate students in the experimental. All study participants completed an initial ergonomics questionnaire. The experimental group was given an ergonomics education session following the questionnaire. Approximately 4 weeks after both groups completed the initial questionnaire;a follow up questionnaire was administered. Results showed that subjects demonstrated a statistically significant improvement in ergonomics knowledge after they completed the ergonomic educational session. Some participants reported making adaptations to laptop positioning and equipment use following the educational session. Thus, participating in ergonomic education can positively influence awareness of body mechanics relative to laptop workstation design.
基金supported by the Key Research and Development Program of Anhui under Grant No.202104a05020064。
文摘Functional testing is key to fulfill quality control in laptop manufacturing and is of great economic value.However,due to the unavailability of practical data,mathematical model and systematic perspective,it has barely been touched from the academic community to date.For the first time,this work provides technical understanding of the key principles of functional testing,mathematically models the general framework,elucidates existing testing strategy under the proposed framework and model,and finally proposes a specified optimization strategy which outperforms existing strategies.This work lays the model foundation for the further optimization of functional testing,and can be regarded as a good example of how a systematic approach can solve practical industrial challenges.
文摘Huawei Launches PCs Running Homegrown Operating System Chinese tech giant Huawei unveiled two laptops powered by HarmonyOS on May 19,marking the debut of its homegrown operating system on personal computers(PCs).The launch of the Huawei MateBook Pro and MateBook Fold Ultimate Design signals the company’s push to expand HarmonyOS beyond smartphones and tablets into a PC market long led by Microsoft’s Windows and Apple’s macOS.
文摘In a crumbling tech hub near the marginal coastline,young Angolan developers,despite the challenges of unreliable Internet and dependence on foreign APIs(application programming interfaces),are tapping on donated laptops,debugging health apps that alert rural clinics of disease outbreaks.Their resilience and determination in the face of such obstacles are not just a source of innovation,but also of inspiration and hope.
文摘为有效预防电磁辐射对人体的危害,用频谱分析仪监测一个110 k V变电站和一个笔记本电脑的电场和磁场强度,分析典型工频设备电磁场的空间分布,评价电磁场对人体的影响,并提出相应的安全防护对策。研究结果表明:主变压器西侧的电场强度较强,并随距离增加而增大,但增大趋势逐渐变缓;磁场强度最强区分布在主变压器南侧,在该方向上呈现先增大后减小的规律。电源柜正对方位上的电场强度随距离呈幂指数衰减;磁场强度随距离呈对数衰减。而笔记本电脑的电磁场较强区分布在其前后方10 cm范围内,在该范围外均随距离增加而减小。长期处在电磁辐射环境中的工作人员应采取必要的安全防护措施,以免危害健康。
