检索结果-内蒙古大学图书馆

IEEE Sensors Conference

作者： Zhou, Mengyang Yao, Jiahui Lu, Yulan Xie, Bo Wang, Junbo Chen, Deyong Chen, Jian Huo, Xiaoye Li, Nan Chinese Acad Sci Aerosp Informat Res Inst State Key Lab Transducer Technol Beijing Peoples R China Univ Chinese Acad Sci Sch Elect Elect & Commun Engn Beijing Peoples R China

ISBN: (纸本)9798350303872

This paper reports a novel digital closed-loop system for micro- electromechanical systems (MEMS) resonant sensors. The system achieves frequency tracking through a quadrature phase-locked loop (QPLL) and creatively incorporates a configurable phase-shifting module. Additionally, an innovative amplitude control module, utilizing feedback adjustment, enables stable vibration of the resonator and mitigates negative effects resulting from variations in the quality factor at different temperatures. The system has been implemented on a field-programmable gate array (FPGA) development board and validated on a MEMS resonant temperature sensor, which exhibits significant changes in quality factor across a temperature range of -40 to 80 degrees C. The design of the amplitude control module reduces temperature sensitivity errors by approximately 14-fold and improves linearity by nearly an order of magnitude. The bias instability of the closed-loop system evaluated by Allan variance is as low as 3.4x10(-4) degrees C.

关键词： MEMS resonant sensor closed-loop system phase-locked loop amplitude control FPGA

来源：评论

学校读者我要写书评

暂无评论

Nonlinear oscillator design based on phase reduction method for closed-loop system

引用

INTERNATIONAL JOURNAL OF ADAPTIVE CONTROL AND SIGNAL PROCESSING 2022年第8期36卷 1958-1997页

作者： Hongu, Junichi Iba, Daisuke Tottori Univ Mech & Phys Engn 4-101 Koyama Cho Minami Tottori Tottori Japan Kyoto Inst Technol Mech Engn Kyoto Japan

To widely utilize the synchronization properties of nonlinear oscillators in the control and signal processing engineering field, a common design method for a nonlinear oscillator model would be helpful. The output response of a nonlinear oscillator excited by a periodic signal implicitly includes the information of both the instantaneous phase and the amplitude of the input signal. Explicitly expressing the dynamics of both phase and amplitude with the phase reduction method, and organizing them by the number of events in one period, could enable the design of a nonlinear oscillator model in the same manner that can synchronize with an arbitrary cyclic phenomenon in a broad sense. Assuming the cyclic phenomenon is a single periodic signal, the property of the generalized nonlinear oscillator model has the role as a common-dimensional observer to attain the pseudo-property of both iso-damping and flat-gain. Thus, this article determines the essential role of the nonlinear oscillator inserted in the closed-loop system through investigating the input-output characteristic of the generalized nonlinear oscillator model. As a result of the numerical simulation using a simple vibration excitation and suppression system, it was found that using the generalized nonlinear oscillator model enables us to easily build the closed-loop system including the pseudo-property of both iso-damping and flat-gain.

关键词： closed-loop system flat-gain iso-damping nonlinear oscillator phase reduction method

来源：评论

学校读者我要写书评

暂无评论

Socio-economic impacts of the COVID-19 pandemic on waste bank closed-loop system in Surabaya, Indonesia

引用

WASTE MANAGEMENT & RESEARCH 2021年第8期39卷 1039-1047页

作者： Warmadewanthi, Idaa Wulandari, Dwi Cahyadi, Mokhamad Nur Pandebesie, Ettina Sitepu Anityasari, Maria Dwipayanti, Ni Made Utami Purnama, I. Gede Herry Nisaa, Ainul Firdatun Inst Teknol Sepuluh Nopember Dept Environm Engn Surabaya Indonesia Inst Teknol Sepuluh Nopember Res Ctr Infrastruct & Sustainable Environm Surabaya Indonesia Inst Teknol Sepuluh Nopember Res Ctr Maritime & Earth Sci Surabaya Indonesia Udayana Univ Bukit Jimbaran Bali Indonesia

The COVID-19 pandemic has caused most waste recycling activities to be terminated due to several factors, such as concerns about the spread of coronavirus through the collected solid waste. This study investigates the socio-economic impact of the situation of the closed-loop system of solid waste recycling. Several recommendations for tackling this problem are presented in this research. Primary data collection for the waste bank and informal recycling sector was carried out in the eastern part of Surabaya during large-scale social restrictions. In-depth interviews were conducted with waste bank customers, waste bank unit representatives and the informal recycling sector to understand the pandemic's socio-economic impact on the closed-loop system. Results show that this pandemic has significant impacts on individuals and stakeholders engaged in waste recycling activities. Customers of waste banks, who mostly belong to low-income communities, mentioned that the waste bank closure gave rise to social and economic problems, such as increasing unmanaged solid waste and decreasing income. This result also applied to the informal recycling sector. The government can use the recommendations in this study to generate related policies, such as enforcing the health protocol within solid waste management to keep the recycling system in place and the business alive.

关键词： closed-loop system COVID-19 informal recycling sector management solid waste waste bank

来源：评论

学校读者我要写书评

暂无评论

No more hypoglycaemia on days with physical activity and unrestricted diet when using a closed-loop system for 12 weeks: A post hoc secondary analysis of the multicentre, randomized controlled Diabeloop WP7 trial

引用

DIABETES OBESITY & METABOLISM 2021年第9期23卷 2170-2176页

作者： Franc, Sylvia Benhamou, Pierre-Yves Borot, Sophie Chaillous, Lucy Delemer, Brigitte Doron, Maeva Guerci, Bruno Hanaire, Helene Huneker, Erik Jeandidier, Nathalie Amadou, Coralie Renard, Eric Reznik, Yves Schaepelynck, Pauline Simon, Chantal Thivolet, Charles Thomas, Claire Hannaert, Patrick Charpentier, Guillaume Sud Francilien Hosp Dept Diabet 40 Ave Serge Dassault F-91100 Corbeil Essonnes France Ctr Etud & Rech Intensificat Traitement Diabet CE Evry France Univ Paris Saclay Lab Biol Exercice Performance & Sante Univ Evry Val dEssonne Inst Rech Biomed Armees Evry France Univ Hosp Grenoble Alpes Dept Diabetol Grenoble France Ctr Hosp Univ Jean Minjoz Dept Endocrinol Metab Diabet & Nutr Besancon France CHU Nantes Hosp Laennec St Herblain France Reims Univ Hosp Dept Endocrinol Diabet & Nutr Reims France Univ Grenoble Alpes Commissariat Energie Atom Lab Elect & Technol Informat Dept Micro Technol Biol & Sante Grenoble France Univ Lorraine Endocrinol Diabet Care Unit Vandoeuvre Les Nancy France Univ Toulouse CHU Toulouse Dept Diabetol Metab Dis & Nutr Toulouse France Diabeloop SA Paris France CHRU Strasbourg UDS Dept Endocrinol Diabet & Nutr Strasbourg France Univ Paris Saclay Orsay France Univ Montpellier Montpellier Univ Hosp Dept Endocrinol Diabet & Nutr Montpellier France Univ Montpellier CNRS Inst Funct Genom INSERM Montpellier France Univ Caen Dept Endocrinol Cote de Nacre Reg Hosp Ctr Caen France Marseille Univ Hosp St Marguerite Hosp Dept Nutr Endocrinol Metab Disorders Marseille France Ctr Hosp Lyon Sud Dept Endocrinol Diabet & Nutr Lyon France Lyon Univ Hosp Ctr Diabet Lyon France INSERM Sch Med & Pharm Poitiers Ischemie Reperfus Transplantat Organes Mecanismes Unite Mixte Rech 1082 Poitiers France

A post hoc analysis of the Diabeloop WP7 multicentre, randomized controlled trial was performed to investigate the efficacy of the Diabeloop Generation-1 (DBLG1) closed-loop system in controlling the hypoglycaemia induced by physical activity (PA) in real-life conditions. Glycaemic outcomes were compared between days with and without PA in 56 patients with type 1 diabetes (T1D) using DBLG1 for 12 weeks. After the patient announces a PA, DBLG1 reduces insulin delivery and, if necessary, calculates the amount of preventive carbohydrates (CHO). Daily time spent in the interstitial glucose range less than 70 mg/dL was not significantly different between days with and without PA (2.0% +/- 1.5% vs. 2.2% +/- 1.1%), regardless of the intensity or duration of the PA. Preventive CHO intake recommended by the system was significantly higher in days with PA (41.1 +/- 35.5 vs. 21.8 +/- 28.5 g/day;P < .0001), and insulin delivery was significantly lower (31.5 +/- 10.5 vs. 34.0 +/- 10.5 U/day;P < .0001). The time spent in hyperglycaemia and the glycaemic variation coefficient increased significantly on days with PA. In real-life conditions, the use of DBLG1 avoids PA-induced hypoglycaemia. Insulin adjustments and preventive CHO recommendation may explain this therapeutic benefit.

关键词： artificial pancreas closed-loop system continuous glucose monitoring glycaemic control hypoglycaemia insulin pump therapy physical activity physical intervention randomized controlled trial type 1 diabetes

来源：评论

学校读者我要写书评

暂无评论

A Digital closed-loop Control system for MEMS Resonant Pressure Sensors Based on a Quadrature Phase-Locked loop

引用

IEEE SENSORS JOURNAL 2024年第7期24卷 10355-10363页

作者： Zhou, Mengyang Xia, Wenliang Lu, Yulan Xie, Bo Chen, Jian Wang, Junbo Chen, Deyong Chinese Acad Sci Aerosp Informat Res Inst State Key Lab Transducer Technol Beijing 100190 Peoples R China Univ Chinese Acad Sci Sch Elect Elect & Commun Engn Beijing 100049 Peoples R China

This article presents a quadrature phase-locked-loop (QPLL)-based digital system for closed-loop control of micro-electromechanical system (MEMS) resonant sensors. The system estimates the sensing signal of the resonator in the form of in-phase and quadrature-phase components by an optimization algorithm, which extends the frequency tracking range and automatically adjusts the amplitude to ensure the linear vibration of the resonator. According to the simulation results, the system has the advantages of fast response and good tracking accuracy. The system has been implemented on a field-programmable gate array (FPGA) development board and validated on an MEMS resonant pressure sensor working by electrostatic excitation and capacitive detection. Experiments show that the proposed system exhibits high linearity, faster startup response, and better frequency stability compared with the previous automatic gain control (AGC)-based analog circuit. Furthermore, the system is widely applicable to sensors with similar resonant characteristics. It has great potential for resonant sensors that require amplitude detection, such as weakly coupled sensors based on the mode-localized phenomenon or parametric coupled sensors subject to blue-sideband excitation.

关键词： Sensors Pressure sensors Sensor systems Resonant frequency Micromechanical devices Sensor phenomena and characterization closed loop systems closed-loop system field-programmable gate array (FPGA) micro-electromechanical system (MEMS) resonant sensor optimization algorithm phase-locked loop (PLL)

来源：评论

学校读者我要写书评

暂无评论

Healthcare professionals' views about how pregnant women can benefit from using a closed-loop system: Qualitative study

引用

DIABETIC MEDICINE 2023年第5期40卷 e15072-e15072页

作者： Lawton, Julia Rankin, David Hartnell, Sara Lee, Tara Dover, Anna R. Reynolds, Rebecca M. Hovorka, Roman Murphy, Helen R. Hart, Ruth I. AiDAPT Collaborative Grp Univ Edinburgh Usher Inst Med Sch Edinburgh Scotland Cambridge Univ Hosp NHS Fdn Trust Cambridge England Norwich Med Sch Norwich England Norfolk & Norwich Univ Hosp NHS Fdn Trust Norwich England Royal Infirm Edinburgh NHS Trust Edinburgh Ctr Endocrinol & Diabet Edinburgh Scotland Univ Edinburgh Queens Med Res Inst Ctr Cardiovasc Sci Edinburgh Scotland Univ Cambridge Wellcome Trust MRC Inst Metab Sci Cambridge England Univ Cambridge Dept Paediat Cambridge England Univ Edinburgh Usher Inst Med Sch Edinburgh EH8 9AG Scotland

Background: Interest is growing in how closed-loop systems can support attainment of within-target glucose levels amongst pregnant women with type 1 diabetes. We explored healthcare professionals' views about how, and why, pregnant women benefitted from using the CamAPS FX system during the AiDAPT ***: We interviewed 19 healthcare professionals who supported women using closed-loop during the trial. Our analysis focused on identifying descriptive and analytical themes relevant to clinical ***: Healthcare professionals highlighted clinical and quality-of-life benefits to using closed-loop in pregnancy;albeit, they attributed some of these to the continuous glucose monitoring component. They emphasised that the closed-loop was not a panacea and that, to gain maximum benefit, an effective collaboration between themselves, the woman and the closed-loop was needed. Optimal performance of the technology, as they further noted, also required women to interact with the system sufficiently, but not excessively;a requirement that they felt some women had found challenging. Even where healthcare professionals felt that this balance was not achieved, they suggested that women had still benefitted from using the system. Healthcare professionals reported difficulties predicting how specific women would engage with the technology. In light of their trial experiences, healthcare professionals favoured an inclusive approach to closed-loop rollout in routine clinical ***: Healthcare professionals recommended that closed-loop systems be offered to all pregnant women with type 1 diabetes in the future. Presenting closed-loop systems to pregnant women and healthcare teams as one pillar of a three-party collaboration may help promote optimal use.

关键词： closed-loop system continuous glucose monitoring qualitative research healthcare professionals pregnancy technology type 1 diabetes

来源：评论

学校读者我要写书评

暂无评论

Fuzzy multi-objective optimization model to design a sustainable closed-loop manufacturing system

引用

PEERJ COMPUTER SCIENCE 2025年 11卷 e2591-e2591页

作者： Kousar, Sajida Alvi, Asma Kausar, Nasreen Garg, Harish Kadry, Seifedine Kim, Jungeun Int Islamic Univ Dept Math & Stat Islamabad Pakistan Yildiz Tech Univ Fac Arts & Sci Dept Math Istanbul Turkiye Thapar Inst Engn & Technol Deemed Univ Dept Math Patiala Punjab India Lebanese Amer Univ Dept Comp Sci & Math Beirut Lebanon Middle East Univ MEU Res Unit Amman Jordan Inha Univ Dept Comp Engn Incheon South Korea

Republicans and Democrats practically everywhere have been demonstrating concerns about environmental conservation to achieve sustainable development goals (SDGs) since the turn of the century. To promote fuel (energy) savings and a reduction in the amount of carbon dioxide CO2 emissions in several enterprises, actions have been taken based on the concepts described. This study proposes an environmentally friendly manufacturing system designed to minimize environmental impacts. Specifically, it aims to develop a sustainable manufacturing process that accounts for energy consumption and CO2 emissions from direct and indirect energy sources. A multi-objective mathematical model has been formulated, incorporating financial and environmental constraints, to minimize overall costs, energy consumption, and CO2 emissions within the manufacturing framework. The input model parameters for real-world situations are generally unpredictable, so a fuzzy multi-objective model will be developed as a way to handle it. The validity of the proposed ecological industrial design will be tested using a scenario-based approach. Results demonstrate the high reliability, applicability, and effectiveness of the proposed network when analyzed using the developed techniques.

关键词： Multi-objective optimization closed-loop system Sustainability

来源：评论

学校读者我要写书评

暂无评论

Subspace-Aided closed-loop system Identification With Application to DC Motor system

引用

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 2020年第3期67卷 2304-2313页

作者： Li, Kuan Luo, Hao Yang, Chengming Yin, Shen Harbin Inst Technol Dept Control Sci & Engn Harbin 150001 Heilongjiang Peoples R China

A novel closed-loop numerical algorithm for subspace state space system identification (CN4SID) is proposed in this paper. Different from standard schemes, CN4SID algorithm can extend the standard LQ decomposition to the closed-loop cases by incorporating the controller information. Moreover, the proposed method can deliver unbiased pole estimation in the closed-loop framework. To this end, CN4SID algorithm shows superior pole estimation performance compared with a class of subspace identification method via principal component analysis algorithms. The effectiveness of the proposed CN4SID algorithm is finally verified through a practical dc motor system.

关键词： Estimation Mathematical model closed loop systems Standards Instruments DC motors Aerospace electronics closed-loop system dc motor system subspace method system identification

来源：评论

学校读者我要写书评

暂无评论

Parents' experiences of using a hybrid closed-loop system (CamAPS FX) to care for a very young child with type 1 diabetes: Qualitative study

引用

DIABETES RESEARCH AND CLINICAL PRACTICE 2022年 187卷 109877-109877页

作者： Kimbell, Barbara Rankin, David Hart, Ruth I. Allen, Janet M. Boughton, Charlotte K. Campbell, Fiona Frohlich-Reiterer, Elke Hofer, Sabine E. Kapellen, Thomas M. Rami-Merhar, Birgit Schierloh, Ulrike Thankamony, Ajay Ware, Julia Hovorka, Roman Lawton, Julia Univ Edinburgh Usher Inst Med Sch Edinburgh Scotland Univ Cambridge MRC Inst Metab Sci Wellcome Trust Cambridge England Univ Cambridge Dept Paediat Cambridge England Leeds Childrens Hosp Dept Paediat Diabet Leeds England Med Univ Graz Dept Pediat & Adolescent Med Graz Austria Med Univ Innsbruck Dept Pediat 1 Innsbruck Austria Univ Leipzig Hosp Children & Adolescents Leipzig Germany Hosp Children & Adolescents Nicolausholz Bad Kosen Naumburg Germany Med Univ Vienna Comprehens Ctr Pediat Dept Pediat & Adolescent Med Vienna Austria Ctr Hosp Dept Pediat Diabet & Endocrinol Clin Pediat Luxembourg Luxembourg Univ Cambridge Addenbrookes Hosp Childrens Serv Hosp NHS Fdn Trust Cambridge England Univ Edinburgh Usher Inst Teviot Pl Edinburgh EH8 9AG Scotland

Aims: To explore parents' experiences of using a hybrid closed-loop system (CamAPS FX) when caring for a very young child (aged 1-7 years) with type 1 diabetes. Methods: Interviews with n = 33 parents of 30 children who used the system during a randomised controlled trial. Data analysis used a descriptive thematic approach. Results: While some parents were initially reticent about handing control to the system, all reported clinical benefits to using the technology, having to do less diabetes-related work and needing less clinical input over time. Parents welcomed opportunities to enhance the system's efficacy (using Ease-off and Boost functions) as required. Parents described how the system's automated glucose control facilitated more normality, including sleeping better, worrying less about their child, and feeling more confident and able to outsource care. Parents also described more normality for the child (alongside better sleep, mood and concentration, and lessened distress) and siblings. Parents liked being able to administer insulin using a smartphone, but suggested refinements to device size and functionality. Conclusions: Using a hybrid closed-loop system in very young children can facilitate greater normality and may result in a lessened demand for health professionals' input. systems may need to be customised for very young children.

关键词： closed-loop system Type 1 diabetes Parents Young children Qualitative

来源：评论

学校读者我要写书评

暂无评论

Dual-Rate Control system Extension Using the Null Space of a closed-loop system

引用

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING 2020年第1期15卷 135-139页

作者： Yasui, Ryota Kawaguchi, Natsuki Sato, Takao Araki, Nozomu Konishi, Yasuo Univ Hyogo Grad Sch Engn 2167 Shosha Himeji Hyogo 6712280 Japan

The present paper discusses a design method for a single-input single-output linear time-invariant dual-rate sampled-data control system, where the sampling interval of a plant output is longer than the holding interval of a control input. In such a control system, intersample output oscillation, called ripple, can occur even if the sampled output converges to the reference input. In order to resolve this problem, two design methods have been proposed such that the existing sampled output response is maintained: an open-loop system design method and a closed-loop system design method. However, the open-loop design method cannot be applied to systems for which the gain matrix of the control input is full rank. On the other hand, the closed-loop design method can be used for such systems, but the sampled output response is maintained only in the steady state. The present study proposes a new closed-loop design method in which ripples are eliminated and both the transient and steady-state responses are maintained. The effectiveness of the proposed method is demonstrated through numerical examples. (C) 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

关键词： dual-rate control system closed-loop system null space intersample output ripple

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：