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新型低功耗低温漂带隙基准电路设计

中国集成电路 2024年第3期33卷 50-53,77页

作者：孙丰毅李建成湘潭大学物理与光电工程学院

本文提出了一种新型参考电压电路设计方式,其产生的输出参考电压,又被称为带隙基准,具有超低功耗、低温漂系数的特点,电路简单易于实现,非常适合于低功耗领域芯片设计的应用。与传统的带隙基准电路不同,此电路利用具有负温度系数的双极... 详细信息

本文提出了一种新型参考电压电路设计方式,其产生的输出参考电压,又被称为带隙基准,具有超低功耗、低温漂系数的特点,电路简单易于实现,非常适合于低功耗领域芯片设计的应用。与传统的带隙基准电路不同,此电路利用具有负温度系数的双极晶体管基极-发射极电压和工作在亚阈值区域具有正温度系数的MOS管栅极-源极电压相加权,构成一个带隙基准电压。设计采用110nm半导体工艺,电源电压1.8V,在典型工艺角下,-40℃~105℃温度范围内平均功耗电流为948nA,温漂系数为11.64ppm/℃。

关键词：低功耗低温漂带隙基准负温度系数亚阈值正温度系数

ADS-B射频基带一体化接收芯片的基带设计

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中国集成电路 2024年第3期33卷 26-31页

作者：朱子玉李建成湘潭大学物理与光电工程学院

广播式自动相关监视(ADS-B)接收机为适应不同平台,需要兼顾小型化、低功耗,低成本与高灵敏度。针对已有ADS-B接收机无法同时满足上述需求,本文创新性地提出一种ADS-B射频基带一体化芯片的基带设计。基带利用数字下变频与低通滤波解进行... 详细信息

广播式自动相关监视(ADS-B)接收机为适应不同平台,需要兼顾小型化、低功耗,低成本与高灵敏度。针对已有ADS-B接收机无法同时满足上述需求,本文创新性地提出一种ADS-B射频基带一体化芯片的基带设计。基带利用数字下变频与低通滤波解进行信号解调。采用匹配滤波算法检测帧头,基线多样点技术[1]提取数据位和置信度。纠错模块基于置信度纠正校验错误的报文。仿真验证与后端设计表明,基带满足最小信噪比71dB,接收报文信号时功耗为9.65mW,接收芯片灵敏度可达-92dBm。

关键词：广播式自动相关监视基带匹配滤波基线多样点技术

Origin of the Mushroom Stone Forest at the southeastern foot of the little Sangpu Mountain in eastern Guangdong,China: A palaeo-sea-level indicator or not?

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Journal of Mountain Science 2019年第3期16卷 487-503页

作者： li jian-cheng WANG Wei ZHENG Yan-ming Geography department of Hanshan Normal University Geographic school of South China Normal University

The Mushroom Stone Forest, which consists of granite boulders looking like mushrooms with flared sidewalls, is located in eastern Guangdong China, and is a famous scenic spot that draws many tourists each year. The Mushroom Stone Forest has been traditionally recognized as a collection of wave erosion landforms and used for the reconstruction of palaeo-sea-level changes along the coastal areas of eastern Guangdong in previous coastal researches. By combining in situ measurements of the aspect,vertical profile and height of boulder sidewalls,palaeo-coastal wave direction estimation, rock density determination, major elemental analysis, and petrographic thin section analysis, this paper presents an alternative origin for the Mushroom Stone *** results suggest that wave or wind erosion cannot offer a satisfactory explanation for the formation of the Mushroom Stone Forest; The boulders that make up the Mushroom Stone Forest originated from the corestones in the granite weathering crusts of the little Sangpu Mountain; When the debris of the weathering crust was removed, the corestones are perched on rocky outcrops or half-buried by weathering debris beneath the natural land surface;The flared sidewall (concave vertical profile) of the boulders is a particular form developed in the foot zone of a half-buried boulder through increased chemical weathering beneath the land surface. A recent exposed half-buried boulder found in the study area provides convincing evidence to support this argument. Sea water reached the foot of the Sangpu Mountain during the Holocene transgression, but it merely provided a mechanism to erode the weathering debris from the bottom of the mushroom rocks and enhanced salt weathering that created tafoni on the boulders. These findings demonstrate that the boulders of the Mushroom Stone Forest are not sea stacks and cannot be served as a palaeo-sea-level indicator.

关键词： Biotite granite Mushroom rock Sea level indictor Wave erosion Chemical weathering little Sangpu Mountain China

老年人口腔健康自我效能干预对可摘局部义齿修复患者满意度的影响

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中华老年口腔医学杂志 2024年第4期22卷 220-223,245页

作者：张利田瑞雪李建成利辛县人民医院口腔科亳州236800 蚌埠医科大学第一附属医院医学中心 233004

目的探讨老年人口腔健康自我效能干预在可摘局部义齿修复中的应用价值。方法选择100例门诊单颌牙列缺损行可摘局部义齿修复的老年患者,分为干预组和对照组,均于修复前后填写老年人口腔健康自我效能量表(GSEOH),干预组根据患者修复前自... 详细信息

目的探讨老年人口腔健康自我效能干预在可摘局部义齿修复中的应用价值。方法选择100例门诊单颌牙列缺损行可摘局部义齿修复的老年患者,分为干预组和对照组,均于修复前后填写老年人口腔健康自我效能量表(GSEOH),干预组根据患者修复前自我效能量表各项评分,有针对性地对患者进行干预,对照组无特殊处理,比较两组患者可摘局部义齿修复后的满意度是否有差异。结果干预组老年可摘局部义齿修复患者义齿修复后满意度高于对照组,差异具有统计学意义。结论老年人口腔健康自我效能干预能有效提高老年可摘局部义齿修复患者的满意度。

关键词：可摘局部义齿老年人口腔健康自我效能

Fiber-shaped Supercapacitors:Advanced Strategies toward High-performances and Multi-functions

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Chinese Journal of Polymer Science 2020年第5期38卷 403-422,I0004页

作者： Jie Yang Xue-lian lia Jing-Wen Zhou Bin Wang jian-li cheng Institute of Chemical Materials China Academy of Engineering PhysicsMianyang 621900China Sichuan Research Center of New Materials Chengdu 610200China

Fiber-shaped supercapacitors(FSSCs)show great potential in portable and wearable electronics due to their unique advantages of high safety,environmental friendliness,high performances,outstanding flexibility and *** can directly act as the power sources or be easily integrated with other flexible devices to constitute self-powered and sustainable energy suppliers,providing excellent adaptability to irregular *** review mainly summarizes the recently reported works of FSSCs including preparation methods of various fiber electrodes,construction strategies of FSSCs and multi-functional device integrations,exploration of reaction mechanisms and strategies to improve the electrochemical performance and provision of suggestions on further designing and optimization of ***,it shares our perspectives on challenges and opportunities in this field,shedding light on the development of high-performance fiber-shaped supercapacitors with multifunctions.

关键词： Fiber-shaped supercapacitor Performance improvement Multi-function device Integrated electronics

急性心肌梗死患者血清sTNFR1、CD137水平变化对MACE的影响及发生MACE的影响因素分析

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临床和实验医学杂志 2024年第15期23卷 1583-1587页

作者：李艳萍李建成孙春喜商洛市中心医院心血管内科陕西商洛726000

目的探讨急性心肌梗死(AMI)患者血清可溶性肿瘤坏死因子受体1(sTNFR1)、白细胞分化抗原-137(CD137)水平变化对心血管不良事件(MACE)的影响及发生MACE的影响因素。方法前瞻性选取2019年10月至2022年3月商洛市中心医院收治的AMI患者120例... 详细信息

目的探讨急性心肌梗死(AMI)患者血清可溶性肿瘤坏死因子受体1(sTNFR1)、白细胞分化抗原-137(CD137)水平变化对心血管不良事件(MACE)的影响及发生MACE的影响因素。方法前瞻性选取2019年10月至2022年3月商洛市中心医院收治的AMI患者120例作为观察组,并根据AMI患者MACE发生情况分为MACE组(n=25)及非MACE组(n=95),另选取同期来我院体检的健康者120名作为对照组。收集AMI患者一般资料与临床特征:性别、年龄、体重指数、合并糖尿病、高脂血症、高血压、Killip心功能分级、饮酒史、吸烟史、左心室射血分数、预后危险[心肌梗死溶栓(TIMI)评分]、脑钠肽、肌钙蛋白T水平。比较观察组与对照组、MACE组与非MACE组的血清sTNFR1、CD137水平。采用Pearson相关性分析法分析sTNFR1、CD137与AMI后MACE发生的相关性。采用单因素分析和多因素Logistics回归分析对影响AMI后MACE的因素进行分析。结果观察组sTNFR1、CD137水平分别为(372.53±65.26)μg/L、(125.75±23.67)pg/mL,均高于对照组[(231.56±46.80)μg/L、(71.43±11.57)pg/mL],差异均有统计学意义(P0.05),非MACE组与MACE组患者年龄、合并糖尿病、高脂血症、高血压、Killip心功能分级、吸烟史、TIMI评分、脑钠肽、肌钙蛋白T水平比较,差异均有统计学意义(P<0.05)。以合并MACE为因变量,结果显示,心功能分级、吸烟史、TIMI、脑钠肽、sTNFR1、CD137为AMI后MACE的独立危险因素(P<0.05)。结论AMI患者MACE发生后会导致sTNFR1、CD137水平升高,且心功能分级、吸烟史、TIMI评分、脑钠肽、sTNFR1、CD137为AMI后MACE的独立危险因素。

关键词：心肌梗死不良心血管事件可溶性肿瘤坏死因子受体1 白细胞分化抗原-137

Force-position collaborative optimization of rope-driven snake manipulator for capturing non-cooperative space targets

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Chinese Journal of Aeronautics 2024年第9期37卷 369-384页

作者： Xiaofeng li jian TIAN cheng WEI Xibin CAO School of Astronautics Harbin Institute of TechnologyHarbin 150001China Beijing Instiuteof Spacecraft System Engineering China Academy of Space TechnolgyBeijing 100094Chia

With the rapid development of space activities,non-cooperative space targets increase swiftly,such as failed satellites and upper stages,threating normal spacecrafts *** there are some problems in the capture process,such as excessive collision and fast tumbling of targets,manipulator with redundant Degrees of Freedom(DOFs)can be used to improve the compliance and therefore solve these *** Rope-Driven Snake Manipulator(RDSM)is a combina-tion of hyper-redundant DOFs and better compliance,and therefore it is suitable for capturing *** this paper,a snake manipulator mechanism is designed,and the complete kinematic model and system dynamic model considering RDSM,target and contact is ***,to obtain the configuration of joint with hyper-redundant DOFs,an improved motion dexterity index is pro-posed as the joint motion optimization ***,the force-position collaborative optimization index is designed to adjust active stiffness,and the impedance control method based on the modified index is used to capture the space ***,the proposed force-position collaborative opti-mization method is verified by virtual prototype *** results demonstrate that based on the proposed method,the collision force is reduced by about 25%compared to normal impe-dance control,showing higher safety.

关键词： Capturing non-cooperative spacetargets Rope-driven snakemanipu-lator Force-position collaborative optimization Redundant degrees of free-dom Active stiffness adjustment

Immune cell pair ratio captured by imaging mass cytometry has superior predictive value for prognosis of non-small cell lung cancer than cell fraction and density

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Cancer Communications 2024年第5期44卷 589-592页

作者： jian-Rong li Chao cheng Institute for Clinical and Translational Research Baylor College of MedicineHoustonTexasUSA Section of Epidemiology and Population Sciences Department of MedicineBaylor College of MedicineHoustonTexasUSA Dan L Duncan Comprehensive Cancer Center Baylor College of MedicineHoustonTexasUSA

Infiltrating immune cells in the tumor microenvironment(TME)play critical roles in the initiation,progression,and metastasis of cancer[1].Previous studies have reported that the infiltration levels of various immune cell types are significantly associated with patient prognosis in different cancers[2,3].Specifically,in non-small cell lung cancer(NSCLC)the prognostic associations of major immune cell types have been investigated[4–6],however,some of the reported associations are inconsistent and remain debated[7].limited by technical issues,most studies focused on a few immune cell lineages or relied on inferred immune cell levels from computational *** investigate the prognostic effects of all major immune cell types unbiasedly,more systematic high-quality immune cell profiling data with matched patient survival information are needed.

关键词： prognosis cancer lung

Using computational fluid dynamic simulation with Flow-3D to reveal the origin of the mushroom stone in the Xiqiao Mountain of Guangdong, China

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Journal of Mountain Science 2022年第1期19卷 1-15页

作者： li jian-cheng WANG Wei ZHENG Yan-ming WEN Xiao-hao FENG Jing SHENG li WANG Chen QIU Ming-kun Department of Geography Hanshan Normal UniversityChaozhou 521041China Geographic School South China Normal UniversityGuangzhou 510631China

Mushroom shaped rocks are not uncommon in nature, but their origin is often misunderstood because they can be formed by different natural forces. A huge mushroom stone in a stream valley of the Xiqiao Mountain of Guangdong,China is widely believed to be formed through the way of stream water erosion. However, the result of the simulation performed with Flow-3 D in this study indicates that the mushroom shape of the rock could not have been sculpted by the flowing water erosion because the simulation result contradicts that of the field investigations:(1) the sediment brought by upstream flowing water tends to be deposited on the leeward side of the flowing water preventing the rock on this side form being eroded, but the narrowest part of the rock bottom is exactly located on this side of the rock and(2) the stream flow should erode the bed sediment and produce high abrasion on the rock surface on the upstream and lateral sides of the rock,respectively, but no abrasion marks are found on the same sides of the rock. Subsequent geological analyses in this study provide evidence that the narrow bottom of the mushroom stone was resulted from chemical and physical weathering happening within the sediment that used to deposit on the lee side of the stone.

关键词： Mushroom Stone Computational fluid dynamics(CFD)model Mineralogical analysis Chemical weathering Xiqiao Mountain happening