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基于自适应校正技术的拼接型像素阵列一致性驱动方法研究

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西北工业大学学报 2024年第2期42卷 353-361页

作者：郭仲杰程新齐许睿明刘绥阳西安理工大学自动化与信息工程学院陕西西安710048

随着拼接工艺在超大阵列CMOS图像传感器中的应用,传统的时钟树同步设计方法已不再适用于像素阵列的双侧驱动电路中,同一行像素阵列的双侧驱动面临直流穿通和坏行的严重问题。基于片上自适应校正思想提出了一种可应用于拼接型像素阵列的... 详细信息

随着拼接工艺在超大阵列CMOS图像传感器中的应用,传统的时钟树同步设计方法已不再适用于像素阵列的双侧驱动电路中,同一行像素阵列的双侧驱动面临直流穿通和坏行的严重问题。基于片上自适应校正思想提出了一种可应用于拼接型像素阵列的一致性驱动方法。该方法根据芯片工作环境的变化进行自适应实时校正,具有结构简单和可靠性高等特点。基于55 nm工艺,采用所提方法在一款12288×12288的150M像素规模、芯片面积高达77 mm×84 mm的超大阵列CMOS图像传感器中进行了实际应用和全面验证。实验结果表明:在500 MHz的主时钟、125 kHz的行时钟下,双侧行驱动的非一致性由17.5 ns减小至2 ns(一个时钟周期)以内,一致性提高了9倍以上,确保了亿级像素规模的超大面阵图像传感器的帧频达到10帧以上。

关键词： CMOS图像传感器超大阵列行驱动一致性

面向超大面阵CMOS图像传感器的全局斜坡一致性校正方法

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电子与信息学报 2024年第7期46卷 2952-2960页

作者：许睿明郭仲杰刘绥阳余宁梅西安理工大学西安710048

针对大面阵CMOS图像传感器(CIS)中存在的斜坡信号不一致性问题,该文提出一种用于CMOS图像传感器的斜坡一致性校正方法。该误差校正方法基于误差存储和电平移位思想,在列级读出电路中引入用于存储各列斜坡不一致性误差的存储电容,根据存... 详细信息

针对大面阵CMOS图像传感器(CIS)中存在的斜坡信号不一致性问题,该文提出一种用于CMOS图像传感器的斜坡一致性校正方法。该误差校正方法基于误差存储和电平移位思想,在列级读出电路中引入用于存储各列斜坡不一致性误差的存储电容,根据存储的斜坡不一致性误差对各列的斜坡信号进行电平移位,确保斜坡信号的一致性。该文基于55 nm 1P4M CMOS工艺对提出的斜坡一致性校正方法完成了详细电路设计和全面仿真验证。在斜坡信号电压范围为1.4 V,斜坡信号斜率为71.908 V/ms,像素面阵规模为8 192(H)×8 192(V),单个像素尺寸为10μm的设计条件下,该文提出的校正方法将斜坡不一致性误差从7.89 mV降低至36.8μV。斜坡信号的微分非线性(DNL)为+0.001 3/–0.004 LSB,积分非线性(INL)为+0.045/–0.02 LSB,列级固定模式噪声(CFPN)从1.9%降低到0.01%。该文提出的斜坡一致性校正方法在保证斜坡信号高线性度,不显著增加芯片面积和不引入额外功耗的基础上,斜坡不一致性误差降低了99.53%,为高精度CMOS图像传感器的设计提供了一定的理论支撑。

关键词： CMOS图像传感器列级固定模式噪声斜坡产生电路斜坡一致性校正方法

基于FPGA的访问控制列表并行查找设计与实现

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无线互联科技 2024年第8期21卷 110-113页

作者：许芮铭武刚中国电子科技集团公司第三十研究所四川成都610041

在高安全要求的网络环境中,多种类型的网络设备均需要部署基于规则的访问控制功能。访问控制列表通过五元组进行规则匹配,实现对网络报文的筛选、过滤、处理、控制等操作。如何利用有限的资源实现更高查表性能、更多规则数量的访问控制... 详细信息

在高安全要求的网络环境中,多种类型的网络设备均需要部署基于规则的访问控制功能。访问控制列表通过五元组进行规则匹配,实现对网络报文的筛选、过滤、处理、控制等操作。如何利用有限的资源实现更高查表性能、更多规则数量的访问控制列表,是相关设备的关键技术之一。通过分析网络通信设备中访问控制列表的一般工作流程,文章提出了一种改进的基于现场可编程逻辑门阵列(Field Programmable Gate Array,FPGA)实现的访问控制列表并行查找设计方法,并详细阐述了具体模块的实现方案。实验结果表明,该方案可以充分利用FPGA的存储与逻辑资源,实现较大规模的支持范围匹配的规则表项,并可以支持10 Gpbs速率等级网络通信的查表需求。

关键词：访问控制列表 FPGA 并行查找五元组范围匹配

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Fixed-time stabilization of output-constrained stochastic high-order nonlinear systems

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Science China(Information Sciences) 2024年第4期67卷 5-20页

作者： ruiming XIE Shengyuan xu Nanjing University of Science and Technology School of Automation

In this study, the fixed-time stabilization problem of stochastic high-order nonlinear systems with output constraint and high-order and low-order nonlinearities is addressed. A new coordinate transformation is employed to directly convert output-constrained stochastic systems into an equivalent unconstrained *** fully extracting the characteristics of system nonlinearities and using the stochastic fixed-time stability theorem, a new design and analysis method is constructed to guarantee that the trivial solution of the closed-loop system is stochastically fixed-time stable while fulfilling the output constraint.

关键词： stochastic high-order nonlinear system outputconstraint high-order and low-order nonlinearity fixed-timestabilization finite-time stabilization

Output feedback stabilization of stochastic high-order planar nonlinear systems with stochastic inverse dynamics and output-constraint

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Science China(Information Sciences) 2024年第3期67卷 182-196页

作者： ruiming XIE Shengyuan xu Nanjing University of Science and Technology School of Automation

In this paper, we solve the output feedback control problem of stochastic high-order planar nonlinear systems with output constraint and stochastic integral input-to-state stability(SiISS) inverse dynamics. By employing a key coordinate transformation, a stochastic nonlinear system with output constraint and SiISS inverse dynamics is converted into an unconstrained system. By skillfully constructing an observer and adopting SiISS small-gain conditions, we develop a new output feedback control design and analysis method, and prove that all the closed-system signals are bounded almost surely, the output constraint is not violated almost surely, and the equilibrium point of the closed-loop system is stochastically asymptotically stable.

关键词： stochastic high-order planar nonlinear system outputconstraint stochastic inverse dynamics output feedbackstabilization stochastic integral input-to-state stability(SiISS)

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Post-modification of MOF to fabricate single-atom dispersed hollow nanocages catalysts for enhancing CO_(2)conversion

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Nano Research 2023年第7期16卷 8970-8976页

作者： Ruirui Yun ruiming xu Changsong Shi Beibei Zhang Tuanhui Li Lei He Tian Sheng Zheng Chen The key laboratory of functional molecular solids Ministry of Education College of chemistry and Materials ScienceAnhui Normal UniversityWuhu 214001China

During the catalytic process,the microenvironment and surface area of the catalyst will affect the catalytic ***,an assisted organic linker coated metal-organic framework(MOF)has been applied,to form Ni/HNC(HNC represents hollow nanocage)for electrocatalytic CO_(2)***,Ni/HNC achieves superb activity with high Faradaic efficiency(FE)of 97.2%at 0.7 V *** hydrogen electrode(RHE)towards CO_(2)conversion to *** contrast to Ni/NPC(afforded from the naked MOF),the Ni/HNC displays higher FE and selectivity on CO rather than H_(2),owing to the large nanocage which extraordinarily facilitates CO_(2)enrichment and the active sites easily *** work provides a general and feasible route to construct high-efficient electrochemical CO_(2)reduction reaction(EC-CO_(2)RR)catalysts via post-modified MOFs.

关键词： post-modification atomically dispersed sites hollow nanocage electrocatalytic CO_(2)reduction

Surface pollen assemblages as indicators of human impact in the warm temperate hilly areas of eastern China

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Chinese Science Bulletin 2011年第10期56卷 996-1004页

作者： DING Wei PANG ruiming xu QingHai LI YueCong CAO XianYong College of Resources and Environmental Sciences and Hebei Key Laboratory of Environmental Change and Ecological Construction HebeiNormal University Shijiazhuang 050016 China

Investigation of 78 surface pollen samples from warm temperate hilly areas of eastern China shows that pollen assemblages in areas of different land use are significantly *** concentrations in wastelands are higher than in plantations;these,in turn,are higher than in farmlands;implying that pollen concentration decreases with increasing human *** pollen dominated by Pinus and Quercus is common in all *** pollen percentages are higher while shrub pollen,fern spores and fern allies are lower in farmlands than in *** pollen is only detectable in and near farmlands;its percentages and concentrations decrease in *** and Cruciferae pollen percentages average 16.7% and 6.7% in farmland respectively,but Cereal reduces to less than 3% and Cruciferae to less than 0.5% in nearby *** coordinates analysis and clustering analysis indicate that pollen assemblages from farmlands are distinguishable from those under other vegetation *** of Poaceae,Chenopodiaceae,Artemisia,and Compositae pollen and Selaginella sinensis spores are closely related to human activities,and their types and frequencies indicate intensity of human *** spatial distribution of crops,Chenopodiaceae,and Artemisia reflects changes in both natural environments and human *** of cereal and Cruciferae pollen,for example,increase with decreasing altitude,but decrease with increasing *** pollen assemblages under artificial and human-disturbed vegetation in hilly areas may aid understanding of human impacts on the plains during the early-middle Holocene.

关键词：丘陵地区中国东部人类影响暖温带孢粉地表花粉浓度十字花科

Mesenchymal stromal cells alleviate acute respiratory distress syndrome through the cholinergic anti-inflammatory pathway

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Signal Transduction and Targeted Therapy 2022年第10期7卷 3884-3897页

作者： Xiaoran Zhang xuxia Wei Yiwen Deng Xiaofeng Yuan Jiahao Shi Weijun Huang Jing Huang Xiaoyong Chen Shuwei Zheng Jieying Chen Keyu Chen ruiming xu Hongmiao Wang Weiqiang Li Shiyue Li Huimin Yi Andy Peng Xiang Department of Surgical Intensive Care The Third Affiliated HospitalSun Yat-Sen UniversityGuangzhouGuangdong 510630China Center for Stem Cell Biology and Tissue Engineering Key Laboratory for Stem Cells and Tissue EngineeringMinistry of EducationSun Yat-Sen UniversityGuangzhouGuangdong 510080China National-Local Joint Engineering Research Center for Stem Cells and Regenerative Medicine Zhongshan School of MedicineSun Yat-Sen UniversityGuangzhouGuangdong 510080China Department of General Intensive Care Unit Lingnan HospitalThe Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 510530China Department of Anesthesiology The First Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong 510080China State Key Laboratory of Respiratory Disease and National Clinical Research Center for Respiratory Disease the First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou Medical UniversityGuangzhouGuangdong 510120China

Mesenchymal stromal cells(MSCs)have been considered a promising alternative for treatment of acute respiratory distress syndrome(ARDS).However,there is significant heterogeneity in their therapeutic efficacy,largely owing to the incomplete understanding of the mechanisms underlying the therapeutic activities of ***,we hypothesize that the cholinergic antiinflammatory pathway(CAP),which is recognized as a neuroimmunological pathway,may be involved in the therapeutic mechanisms by which MSCs mitigate *** lipopolysaccharide(LPS)and bacterial lung inflammation models,we found that inflammatory cell infiltration and Evans blue leakage were reduced and that the expression levels of choline acetyltransferase(ChAT)and vesicular acetylcholine transporter(VAChT)in lung tissue were significantly increased 6 hours after MSC *** the vagus nerve was blocked orα7 nicotinic acetylcholine(ACh)receptor(α7nAChR)-knockout mice were used,the therapeutic effects of MSCs were significantly reduced,suggesting that the CAP may play an important role in the effects of MSCs in ARDS *** results further showed that MSC-derived prostaglandin E2(PGE2)likely promoted ACh synthesis and ***,based on the efficacy of nAChR andα7nAChR agonists,we found that lobeline,the nicotinic cholinergic receptor excitation stimulant,may attenuate pulmonary inflammation and alleviate respiratory symptoms of ARDS patients in a clinical study(ChiCTR2100047403).In summary,we reveal a previously unrecognized MSC-mediated mechanism of CAP activation as the means by which MSCs alleviate ARDS-like syndrome,providing insight into the clinical translation of MSCs or CAP-related strategies for the treatment of patients with ARDS.

关键词： distress cholinergic inflammation

应用于CMOS图像传感器的高速全差分两步式ADC设计方法

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电子与信息学报 2023年第9期45卷 3410-3419页

作者：郭仲杰王杨乐许睿明刘绥阳西安理工大学西安710048

由于传统的单斜式模数转换器(SS ADC)以及改进的各种架构串行两步式SS ADC普遍存在速度瓶颈问题,均无法满足工业界高帧率CMOS图像传感器的发展需求,该文提出一种应用于高帧率CMOS图像传感器的高速全差分两步式ADC设计方法。该ADC设计方... 详细信息

由于传统的单斜式模数转换器(SS ADC)以及改进的各种架构串行两步式SS ADC普遍存在速度瓶颈问题,均无法满足工业界高帧率CMOS图像传感器的发展需求,该文提出一种应用于高帧率CMOS图像传感器的高速全差分两步式ADC设计方法。该ADC设计方法基于差动斜坡与时间数字转换(TDC)技术,将差动量化嵌套在两步式的量化中,形成了区别于串行量化的并行量化模式,不仅提升了数据量化的速率,而且保证了系统的一致性和鲁棒性;针对传统TDC技术与单斜式ADC的匹配性问题,提出了一种基于电平编码的TDC技术,在ADC量化的最后一个时钟周期内,在不提升系统时钟的情况下,完成时间数字转换,实现了更高精度的量化。该文基于55 nm 1P4M CMOS实验平台完成了所提方法的电路设计、版图设计和测试验证。在模拟电压3.3 V、数字电压1.2 V、时钟频率100 MHz、动态输入范围1.6 V的设计环境下,该文ADC设计精度为12 bit,转换时间仅有480 ns,列级功耗低至62μW,DNL以最低有效位(LSB)计为+0.6/–0.6,INL以最低有效位(LSB)计为+1.2/–1.4,信噪失真比(SNDR)达到70.08 dB,与现有的先进单斜式ADC相比,ADC转换速度提高了52%以上,可以有效压缩行处理时间,为高帧率大面阵CMOS图像传感器的实现提供了有效的解决方案。

关键词： CMOS图像传感器差动斜坡时间数字转换电平编码两步式