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Channel Mismatches Correction in Time-Interleaved ADCs Based on Hybrid Filter Bank Reconstruction

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Chinese Journal of Electronics 2014年第1期23卷 75-80页

作者： liu sujuan ZHUO Li JIANG Wenshu ZHANG Meihui College of Electronic Information and Control Engineering Beijing University of Technology

Time-interleaved analog-to-digital converter(TIADC) is an efficient way to achieve higher sampling rate for medium-to-high resolution applications. The performance of a TIADC suffers from the mismatch errors among the sub-channels. This paper presents a method to estimate the channel mismatches using the sub-channels output data. The proposed method introduces an equivalent transfer function for each channel to model and estimate the mismatch errors. A Hybrid filter bank(HFB)structure is used to both model the TIADC and reconstruct the desired uniformly sampled sequence based on the perfect reconstruction conditions of the HFB system.A four-channel 12-bit 400 MHz TIADC has been implemented in hardware to verify the proposed calibration method. The measured results show that the Spuriousfree dynamic range(SFDR) can be improved up to 74 d B after being corrected with 64-tap Finite-impulse response(FIR) filters.

关键词： Time-interleaved(TI) Analog-to-digital converter(ADC) Channel mismatch Hybrid filter bank(HFB)

SESN2 ablation weakens exercise benefits on resilience of gut microbiota following high-fat diet consumption in mice

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Food Science and Human Wellness 2023年第6期12卷 1961-1968页

作者： Chunxia Yu Peng Zhang sujuan liu Yanmei Niu Li Fu Department of Physiology and Pathophysiology School of Basic Medical ScienceTianjin Medical UniversityTianjin 300070China Department of Rehabilitation School of Medical TechnologyTianjin Medical UniversityTianjin 300070China Department of Anatomy and Histology School of Basic Medical ScienceTianjin Medical UniversityTianjin 300070China

Gut dysbiosis is associated with several pathological *** study showed that regular exercise can protect against dysmetabolism in high-fat diet(HFD)fed mice through butyrate-SESN2 pathway,and SESN2 ablation weakened the protective effects of ***,we investigated whether SESN2-defi ciency suppresses the exercise response to microbiota composition and subsequently reduces the benefi ts of exercise on dysmetabolism induced by *** type(WT)and SESN2^(-/-)mice were assigned to fi ve-groups,fed with either normal chow or HFD and with or without exercise training for *** microbiota composition and function were assessed by 16S rRNA *** sequencing results showed that SESN2^(-/-)mice displayed differed microbiome profile from WT *** enriched the microflora diversity and increased the benefi cial microbial species in WT mice,and SESN2 ablation weakened the benefi cial effects of exercise on microbial resilience following HFD ***,network analysis revealed that exercise increased correlation density and clustering of operational taxonomic units in WT mice *** demonstrated that some dominant metabolism-related enzymes and modules increased in SESN2^(-/-)*** results indicated that the effects of exercise on metabolism are associated with the perturbations of gut microbiota composition and function,suggesting that SESN2 contributes to maintain metabolic homeostasis.

关键词： Exercise High-fat diet Sestrin2 Obesity Gut microbiota

ATTACKS AND IMPROVEMENTS ON THE RFID AUTHENTICATION PROTOCOLS BASED ON MATRIX

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Journal of Electronics(China) 2013年第1期30卷 33-39页

作者： Wang Shaohui liu sujuan Computer Science College Nanjing University of Posts and Communications Network and Data Security Key Laboratory of Sichuan Province

Most of the Radio Frequency IDentification (RFID) authentication protocols, proposed to preserve security and privacy, are analysed to show that they can not provide security against some passive or active attacks. In this paper, the security of two matrix-based protocols, proposed by Karthikeyan and Nesterenko (KN protocol) and Ramachandra et al. (RRS protocol) that conform to Electronic Product Code Class-1 Generation-2 (EPC Class-1 Gen-2) standard, are investigated. Using the linear relationship of multiplication of matrix and vector, we point out that both protocols can not provide scalability, and they are vulnerable to passive impersonation attack. In addition, both protocols are totally insecure if the adversary can compromise one tag to extract the secrets. A modified lightweight matrix-based authentication protocol is presented, which can resist mainly common attacks on an RFID authentication system including eavesdropping, relay attack, desynchronization attack, impersonation attack and tag tracking attack. The new protocol also has the desirable scalability property and can keep secure under compromising attack.

关键词： Radio Frequency IDentification (RFID) Mutual authentication Matrix-based Imper-sonation attack Privacy Scalability

Metabolic Adaptations to Exercise Training

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Journal of Science in Sport and Exercise 2020年第1期2卷 1-6页

作者： sujuan liu Yanmei Niu Li Fu School of Basic Medical Science Tianjin Medical UniversityTianjin 300070China Department of Rehabilitation School of Medical TechnologyTianjin Medical UniversityTianjin 300070China

The health benefits of exercise have attracted substantial attention,because regular exercise can strengthen muscles and improve *** activity is an integral part of an overall healthy lifestyle,which helps protect against chronic diseases,such as obesity,insulin resistance and type 2 *** consideration of the differences in duration,intensity,and type of activity of exercise,it is likely to involve different signaling pathways and bring different benefits in different *** we review our growing knowledge of exercise training adaptations and regulation in cellular processes related to energy metabolism,aging and autophagy,and many important findings remain to be discovered.

关键词： Exercise Energy metabolism Aging Epigenetic.Autophagy Gut microbiota

Globular adiponectin ameliorates insulin resistance in skeletal muscle by enhancing the LKB1-mediated AMPK activation via SESN2

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Sports Medicine and Health Science 2023年第1期5卷 34-41页

作者： Xinmeng liu Yang Yang Heng Shao sujuan liu Yanmei Niu Li Fu Department of Rehabilitation School of Medical TechnologyTianjin Medical UniversityTianjinChina Department of Anatomy and Histology School of Basic Medical ScienceTianjin Medical UniversityTianjinChina

Adiponectin has been demonstrated to be a mediator of insulin sensitivity;however,the underlined mechanisms remain ***2 is a stress-inducible protein that phosphorylates AMPK in different *** this study,we aimed to validate the amelioration of insulin resistance by globular adiponectin(gAd)and to reveal the role of SESN2 in the improvement of glucose metabolism by *** used a high-fat diet-induced wild-type and SESN2/C57BL/6J insulin resistance mice model to study the effects of six-week aerobic exercise or gAd administration on insulin *** vitro study,C2C12 myotubes were used to determine the potential mechanism by overexpressing or inhibiting *** to exercise,six-week gAd administration decreased fasting glucose,triglyceride and insulin levels,reduced lipid deposition in skeletal muscle and reversed whole-body insulin resistance in mice fed on a high-fat ***,gAd enhanced skeletal muscle glucose uptake by activating insulin ***,these effects were diminished in SESN2/*** found that gAd administration increased the expression of SESN2 and Liver kinase B1(LKB1)and increased AMPK-T172 phosphorylation in skeletal muscle of wild-type mice,while in SESN2/mice,LKB1 expression was also increased but the pAMPKT172 was *** the cellular level,gAd increased cellular SESN2 and pAMPK-T172 *** experiment suggested that SESN2 promoted the formation of complexes of AMPK and LKB1 and hence phosphorylated *** conclusion,our results revealed that SESN2 played a critical role in gAd-induced AMPK phosphorylation,activation of insulin signaling and skeletal muscle insulin sensitization in mice with insulin resistance.

关键词： Adiponectin Sestrins AMP-Activated protein kinase Exercise training Glucose homeostasis

Neuronal activation by acupuncture at Yongquan(KI1) and sham acupoints in patients with disorder of consciousness: a positron emission tomography study

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Neural Regeneration Research 2014年第5期9卷 500-501页

作者： Hao Zhang Xinting Sun sujuan liu Yingmao Chen Feng Ling Department of Neurorehabilitation China Rehabilitation Research CenterBeijing China Department of Hyperbaric Oxygen Fuxing HospitalBeijing China Department of Nuclear Medicine Chinese PLA General Hospital Department of Neurosurgery Xuanwu Hospital Capital Medical University

Disorder of consciousness （DOC） is one of the most serious sequelae of brain injury, and is challenging for neurologists and rehabilitation special- ists to manage because of its refractory nature （Whyte et al., 2013）. Acu- puncture is a traditional Chinese medicine technique that is often used to help improve the level of consciousness in patients with DOC. However, the responses to stimulation of acupoints in patients with DOC are not fully understood.

关键词： a positron emission tomography study and sham acupoints in patients with disorder of consciousness KI1 Neuronal activation by acupuncture at Yongquan

基于记忆多项式的时间交织模数转换器自适应非线性失配校正方法

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电子与信息学报 2021年第12期43卷 3718-3726页

作者：刘素娟张仲侯北京工业大学微电子学院北京100124

为了提高时间交织模数转换器(TIADC)的有效分辨率,需要对其通道之间的线性/非线性失配误差进行估计和补偿。该文针对M通道TIADC的带有记忆效应的非线性失配误差提出了一种自适应盲校正算法。通过子通道重构结构(SCR)重构非线性误差信号... 详细信息

为了提高时间交织模数转换器(TIADC)的有效分辨率,需要对其通道之间的线性/非线性失配误差进行估计和补偿。该文针对M通道TIADC的带有记忆效应的非线性失配误差提出了一种自适应盲校正算法。通过子通道重构结构(SCR)重构非线性误差信号,并通过滤波降采样最小均方(FDLMS)算法估计非线性失配误差系数。实验仿真结果表明,该方法可以有效校正带有记忆效应的非线性失配误差,并且可以大大降低实现难度和硬件资源消耗。

关键词：时间交织模数转换器非线性失配误差子通道重构结构自适应盲校正

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机制设计理论视野下的“学分银行”机制建设

教育发展研究 2014年第7期34卷 71-75页

作者：刘素娟东北师范大学教育科学学院博士研究生长春130024

当前"学分银行"机制建设已成为许多学者关注的热点,但大部分研究侧重于对"学分银行"机制的经验借鉴式的描述和实践性的探索,局限于"学分银行"的本体范围内。本文在以往学者研究的基础上,尝试借用经济学领域的研究成果,从机制设计理论的... 详细信息

当前"学分银行"机制建设已成为许多学者关注的热点,但大部分研究侧重于对"学分银行"机制的经验借鉴式的描述和实践性的探索,局限于"学分银行"的本体范围内。本文在以往学者研究的基础上,尝试借用经济学领域的研究成果,从机制设计理论的视野进行"学分银行"机制研究,分析其运行的可靠性和可行性,探索解决其面临的信息不对称、激励不相容、资源配置不充足、配置效率低下等一系列现实问题。

关键词：机制设计理论 “学分银行”设计 “学分银行”运行

In Situ Regeneration of Mo/MCM-22 with 1%O_2 at Reaction Temperature

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催化学报 2003年第11期24卷 805-806页

作者： BAI Jie, XIE sujuan, liu Shenglin, XU Longya, LIN Liwu (State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China) Dalian Institute of Chemical Physics The Chinese Academy of Sciences State Key Laboratory of Catalysis 辽宁 Dalian 116023

In recent years, the catalytic dehydroaromatization of methane to yield aromatics has been a challenging and intriguing topic in heterogeneous catalysis. Until now, the two effective methane dehydroaromatization catalysts are Mo/HZSM-5 and Mo/MCM-22. However, this reaction suffers from rapid catalyst deactivation due to coking. The stabilization of catalyst activity is a primary problem to be solved for its future application.

关键词： Mo/MCM-22 原位反应催化剂再生反应温度钼沸石甲烷氧气脱氢芳构化