City Network Evolution Characteristics of Smart Industry: Evidence from Yangtze River Delta, China

The dual-path model of industrial evolution and spatial progression has been widely acknowledged and incorporated into the strategic planning to promote the development of urban industries and regional collaborations.However,current research on inter-enter-prise city networks mainly focuses on the single sector of flows on all enterprise branches,such as product value chains and production factors,but neglects that of particular industry department.Built upon the new economic geography and city networks theory,this paper develops a methodological framework that focuses on the analysis of city network evolution characteristics of smart industry.Particu-larly,a conceptual model of smart industry enterprise-industry-city is proposed and then applied to a case study of smart industry in the Yangtze River Delta Region,China.Using enterprise supplier-customer data,a city network of smart industry is constructed and sub-sequently analyzed with the proposed model.Findings indicate that the smart industry network in Yangtze River Delta Region exhibits a hierarchical structure and the expansion of the network presents a small-world network characteristic.The study not only makes a meth-odological contribution for revealing the industrial and spatial evolution path of the current smart industry,but also provides empirical support for the formulation of new economic development policies focused on smart industries,demonstrating the role of city clusters as carriers of regional synergistic development.

Analysis of factors influencing carbon emissions in the Yangtze River Delta region and projections of carbon peak scenarios

Based on the supply-side perspective,the improved STIRPAT model is applied to reveal the mechanisms of supply-side factors such as human,capital,technology,industrial synergy,institutions and economic growth on carbon emissions in the Yangtze River Delta(YRD)through path analysis,and to forecast carbon emissions in the YRD from the baseline scenario,factor regulation scenario and integrated scenario to reach the peak.The results show that:(1)Jiangsu's high carbon emission pattern is the main reason for the YRD hindering the synergistic regulation of carbon emissions.(2)Human factors,institutional factors and economic growth factors can all contribute to carbon emissions in the YRD region,while technological and industrial factors can generally suppress carbon emissions in the YRD region.(3)Under the capital regulation scenario,the YRD region has the highest level of carbon emission synergy,with Jiangsu reaching its peak five years earlier.Under the balanced regulation scenario,the YRD region as a whole,Jiangsu,Zhejiang and Anhui reach the peak as scheduled.

Evaluation of Ecological Sustainable Development in the Yangtze River Delta Region Based on Ecological Footprint Theory

The ecological footprint was employed as a quantitative indicator of resource inputs,enabling a detailed account of the structure of biological resources and energy occupancy,as well as the variation of resource productivity in the Yangtze River Delta(YRD)Region.From 2004 to 2018,there were notable variations in the ecological productivity of different types of land on basis of China’s equilibrium factor across the three provinces and one city in the YRD region.Jiangsu Province exhibited the highest ecological productivity of arable land,while Anhui Province exhibited the highest ecological productivity of forest land.Shanghai City exhibited the highest ecological productivity of pasture land,while Zhejiang Province exhibited the highest ecological productivity of water area.In 2018,the proportion of arable land within the total ecological carrying capacity of the YRD region reached 74.35%.Furthermore,the contribution of Jiangsu and Anhui provinces to the YRD’s total ecological carrying capacity was 41.36%and 41.26%,respectively.In the construction of a new development pattern in the YRD region,which is dominated by the domestic cycle as the main body and mutually reinforced by domestic and international double-cycle,the YRD region should combine the utilization of natural forces with innovation in science,technology and cooperation mechanisms.Furthermore,the government should guide the concentration of social capital towards green industries.It is also recommended that the moderate reduction of ecological footprints should be encouraged,and that the security of biological resources and energy,the leadership in the field of cutting-edge science and technology should be ensured in YRD region.This will facilitate the formation of a new development pattern of higher-quality integration at the national level firstly.

Structural Characteristics and Influencing Factors of Carbon Emission Spatial Association Network:A Case Study of Yangtze River Delta City Cluster,China

City cluster is an effective platform for encouraging regionally coordinated development.Coordinated reduction of carbon emissions within city cluster via the spatial association network between cities can help coordinate the regional carbon emission management,realize sustainable development,and assist China in achieving the carbon peaking and carbon neutrality goals.This paper applies the improved gravity model and social network analysis(SNA)to the study of spatial correlation of carbon emissions in city clusters and analyzes the structural characteristics of the spatial correlation network of carbon emissions in the Yangtze River Delta(YRD)city cluster in China and its influencing factors.The results demonstrate that:1)the spatial association of carbon emissions in the YRD city cluster exhibits a typical and complex multi-threaded network structure.The network association number and density show an upward trend,indicating closer spatial association between cities,but their values remain generally low.Meanwhile,the network hierarchy and network efficiency show a downward trend but remain high.2)The spatial association network of carbon emissions in the YRD city cluster shows an obvious‘core-edge’distribution pattern.The network is centered around Shanghai,Suzhou and Wuxi,all of which play the role of‘bridges’,while cities such as Zhoushan,Ma'anshan,Tongling and other cities characterized by the remote location,single transportation mode or lower economic level are positioned at the edge of the network.3)Geographic proximity,varying levels of economic development,different industrial structures,degrees of urbanization,levels of technological innovation,energy intensities and environmental regulation are important influencing factors on the spatial association of within the YRD city cluster.Finally,policy implications are provided from four aspects:government macro-control and market mechanism guidance,structural characteristics of the‘core-edge’network,reconfiguration and optimization of the spatial layout of the YRD city cluster,and the application of advanced technologies.

基于多模型和改进WOA算法的Delta机器人柔性夹持器抓取方法研究

[目的]解决Delta机器人柔性夹持器抓取方法存在的控制精度和适应性较差等问题。[方法]以Delta机器人柔性夹持器为研究对象,提出一种多模型和改进鲸鱼算法相结合的Delta机器人柔性夹持器抓取方法。建立稳定抓取优化模型,在抓持对象表面寻求最佳接触位置。建立无损抓取优化模型,在确保稳定抓起物体的前提下使接触力尽可能地小。结合粒子群算法和鲸鱼算法求解模型。通过试验验证了所提抓取方法的优越性。[结果]所提方法不仅具有良好的控制精度,还能够适应不同形状和大小的物体,具有较高的灵活性和适应性,抓取成功率>96%,抓取损伤率为0。[结论]所提方法有效提高了Delta机器人柔性夹持器抓取方法的性能,适用于果蔬和易碎物品的分拣工作。

Delta大通道内镜辅助下后路椎管减压椎间植骨融合术治疗退变性腰椎疾病的临床疗效

目的:探讨Delta大通道内镜辅助下后路椎管减压椎间植骨融合术治疗退变性腰椎疾病的效果。方法:回顾性分析2021年9月~2022年9月我院收治的80例退变性腰椎疾病患者的病历资料,根据患者治疗方式分为观察组(38例,男17例,女21例,年龄61.0±4.9岁)和对照组(42例,男20例,女22例,年龄60.5±5.4岁),观察组患者采取Delta大通道内镜下Endo-PLIF治疗,对照组采取开放后路腰椎椎间融合术治疗,记录两组患者术中出血量、术后引流量、手术时间、手术切口长度、住院时间,比较患者并发症发生情况。于术前、术后1周、1个月、3个月、6个月使用视觉模拟量表(visual analogue scale,VAS)评分评估患者腰痛情况,并采用Oswestry功能障碍指数(Oswestry disability index,ODI)评估患者腰椎功能;使用改良Macnab标准对患者进行疗效评估。根据患者术后1年随访时的腰椎影像学复查结果,使用Bridwell椎间融合标准对患者手术节段融合情况进行评估。结果:观察组患者的术中出血量及术后引流量分别低于对照组(88.46±10.98mL vs 112.99±12.01mL、159.73±18.42mL vs 201.36±23.06mL,P<0.05),手术切口及住院时间分别短于对照组(1.54±0.36cm vs 5.43±1.01cm、6.79±1.22d vs 8.03±1.43d,P<0.05),手术时间长于对照组(162.33±19.57min vs 126.87±23.15min,P<0.05)。80例患者术后均获随访,随访时间15~40个月(19.0±6.3个月)。观察组患者术后1周、术后1个月的VAS评分分别为2.46±0.51分、1.21±0.38分,ODI分别为(17.84±4.15)%、(10.69±1.88)%,均低于对照组[VAS评分分别为3.68±0.62分、2.01±0.41分,ODI分别为(21.33±3.48)%、(12.33±2.17)%,均P<0.05],两组患者术后3个月、术后6个月的VAS评分比较无统计学差异(P>0.05)。观察组治疗优良率为92.11%,与对照组的85.71%比较无统计学意义(P=0.487)。两组患者融合分级比较,差异无统计学意义(Z=0.487,P=0.624)。观察组术后并发症发生率为5.26%,与对照组的9.52%比较无统计学差异(P=0.678)。结论:Delta大通道内镜辅助下后路椎管减压椎间植骨融合术治疗退变性腰椎疾病效果良好,可以减少术中出血量,缩短手术切口和住院时间,更快改善患者术后短期内疼痛、腰椎功能,安全性较好。

单边双通道内镜与Delta大通道内镜技术治疗L5/S1椎间盘突出并椎管狭窄的临床疗效分析

目的 探讨Delta大通道内镜技术与单边双通道内镜技术(unilateral biportal endoscopy, UBE)治疗L5/S1单节段椎间盘突出并椎管狭窄的疗效。方法 回顾性分析2018年1月至2022年8月手术治疗的60例L5/S1单节段腰椎间盘突出并椎管狭窄患者的临床资料,其中32例采用Delta大通道内镜技术行经皮椎板间入路内镜下椎间盘切除术(Delta内镜组),28例采用UBE内镜技术行椎管减压髓核摘除术(UBE组)。比较两组围手术期指标、腰腿痛VAS评分、 ODI及并发症情况,末次随访时按Macnab标准评价疗效。结果 两组患者均顺利完成手术。Delta内镜组术中出血量少于UBE组,手术时间、住院时间短于UBE组(P<0.001)。两组患者术后腰腿痛VAS评分及ODI均较术前明显降低,且Delta内镜组术后3 d腰痛VAS评分及术后1月腿痛VAS评分均低于UBE组(P<0.05)。术后随访6个月,末次随访按Macnab标准评价疗效:Delta内镜组优30例,可2例,优良率为93.75%;UBE组优27例,可1例,优良率为96.43%;组间比较差异无统计学意义(P>0.05)。Delta内镜组硬膜撕裂1例,因撕裂处较小仅严密缝合手术切口;UBE组出现腿部疼痛加重1例。结论 Delta大通道内镜技术与UBE治疗L5/S1单节段椎间盘突出并椎管狭窄均可获得良好的近期效果,但Delta内镜手术术中出血少,软组织损伤小,操作时间短,术后短期疼痛缓解明显,患者恢复快,而UBE适应证范围相对广泛。

Delta并联机器人运动学性能分析与结构参数优化

Delta并联机器人具有速度快、结构简单、承载力强等优点,在钵苗移栽、产品分拣与包装中应用广泛。针对目前Delta并联机器人各结构参数对运动学性能的影响及系统性结构参数优化设计缺乏完整理论体系的问题,本文分析可达工作空间雅可比矩阵条件数分布规律、结构参数约束关系、运动学性能随结构参数的变化规律及相关性,获得条件数分布特性和失真约束条件,在此基础上得出动静平台半径差和主动臂长度增加和从动杆长度减小能够使得机构性能较优。给定设计工作空间,对原结构进行参数优化设计,通过建立包络惩罚函数,采用多元非线性拟合与线性加权组合法得到运动学性能评价函数,结合条件数分布特性和失真约束条件建立优化模型,利用遗传算法进行优化。相较于优化前,优化后可达工作空间体积减小14.26%,设计工作空间的全局条件数均值和全局条件数标准差分别减小31.20%和11.78%,且设计工作空间各截面条件数分布规律验证了条件数分布特性的可靠性。

Delta型FDM打印设备结构参数设定及运动学研究

FDM打印设备的扫描路径、打印速度、温度、层厚等问题是影响制件外形精度和成型效率的工艺参数的重要因素。Delta型结构作为最常用的FDM设备结构型式之一,其末端打印头的运动由多杆共同作用,运动分析较繁琐,为设备的参数设定增添了很大的难度,存在参数设定和运动分析难的问题。从Delta型的结构分析出发,重点研究了各结构尺寸之间的关联,总结了参数设定和计算的依据。考虑到Delta结构的打印头与3个滑车之间坐标的对应关系并不能通过简单推算得出,需要大量的三角函数运算,建立了Delta型结构的正、逆解运动学模型,结合几何的方式详细推导了运动学反解和正解的解法,分析和求解的结果为设定Delta型设备参数和确定控制程序算法提供了理论依据。经过分析与计算,基于并联机构内核的Delta结构采用正运动求解更便于规避正解集合中的不合理结果。

Influence Mechanism of New-type Urbanization on Urban Land Use Efficiency in the Yangtze River Delta, China

Rapid urbanization in China has led to inefficient use of urban land and spatial structure disorder,attracting attention from academia and society.Taking the Yangtze River Delta,China as an example,this study constructed an index evaluation system that quantitatively analyses the impact of new-type urbanization(NTU)on urban land use efficiency(ULUE)from 2000 to 2020 using a panel data vector autoregressive model.The results show that NTU in the Yangtze River Delta promotes ULUE improvement.However,the promotion of NTU to ULUE is limited,and the level of urban economic development also plays a role in promoting the change of ULUE.Moreover,the study further analyzed the results of urbanization decomposition and found that population urbanization(PU),economic urbanization(EU),spatial urbanization(SU),and social urbanization(SCU)can explain changes in ULUE in the Yangtze River Delta to a certain extent.In terms of variance decomposition,PU contributed the most to ULUE,followed by EU,SU,and SCU.Some necessary measures should be taken to coordinate the development of different types of urbanization,improve the sustainable utilization level of land resources,and provide a reference for high-quality development in the Yangtze River Delta.

基于Delta分位数映射法的青藏高原中东部IMERG卫星降水误差订正

可靠的降水资料对理解青藏高原水量平衡和水循环过程尤为重要。IMERG(Integrated MultisatellitE Retrievals for Global Precipitation Measurement)是新一代卫星降水产品,具有更广的覆盖范围与更高的时空分辨率,但在高原复杂地形条件下仍然存在较大的不确定性。鉴于此,本研究应用Delta分位数映射法(Quantile Delta Mapping,QDM),对IMERG日降水数据进行偏差订正,使用2001-2010年的中国区域地面气象要素数据集(China Meteorological Forcing Dataset,CMFD)降水数据和IMERG日降水产品分季节建立传递函数,对2011-2014年的IMERG逐日降水进行订正。研究结果表明:(1)Delta分位数映射法能够有效订正IMERG的降水频率、数值和空间分布,对极端降水和负偏差较大区域的订正效果更为明显。订正后的IMERG降水概率分布更加接近观测概率分布,降水偏差也更符合正态分布,改进了对全年和季节降水空间分布的刻画,提高了月降水的精度。(2)订正后日降水量均方根误差由1.49 mm·d^(-1)降低到1.26 mm·d^(-1),精度提高了15.44%;订正后的日降水在不同降水量级的临界成功指数CSI、命中率POD、误报率FAR、准确率Precision和F评分Fscore均有提高,降低了微量和暴量降水的空报率。(3)对极端降水的订正效果显著,降水强度SDII以及极强降水量R95p和R99p的均值更接近观测值;有效提高了对极端降水空间分布的表征,极端降水偏差从30%以上降低到5%以内;SDII、R95p和R99p的均方根误差从1.59 mm·d^(-1)、6.54 mm·d^(-1)、14.89 mm·d^(-1)降为0.65 mm·d^(-1)、3.01 mm·d^(-1)、8.99 mm·d^(-1),精度分别提高了59.12%、53.98%和39.62%。本研究验证了Delta分位数映射法在青藏高原的适用性,有利于为青藏高原气象和水文研究获取更精确的降水数据。

Measurement of Digital Economy Development Level in Yangtze River Delta and Its Influence on Ecological Efficiency

Based on the panel data of 41 cities in the Yangtze River Delta from 2007 to 2018,this paper empirically tests the impact of digital economy development on urban ecological efficiency in the Yangtze River Delta.The results show that the development level of digital economy in Yangtze River Delta urban agglomeration is fluctuating and rising;the development of digital economy has a significant positive role in promoting the improvement of urban ecological efficiency;there is significant regional heterogeneity in the promotion of ecological efficiency by digital economy,especially in central cities.

Delta超声组学对早期乳腺癌新辅助治疗疗效的预测价值

目的探讨Delta超声组学对乳腺癌新辅助治疗(NAT)后疗效的预测价值。方法将140例乳腺癌新辅助治疗患者按照软件中的随机种子数以7∶3比例分成训练集(98例)及验证集(42例)。基于肿瘤NAT治疗前、NAT治疗2个疗程后最大径相对退缩值构建传统影像模型;基于治疗前与2个疗程后的超声图像提取和筛选相应影像组学特征并计算其Delta,构建Delta超声组学模型并计算其影像组学得分(Radscore);基于有意义的临床病理指标结合Radscore构建综合模型,采用受试者操作特征曲线(ROC)评估模型预测乳腺癌NAT后病理完全缓解(pCR)的效能,比较它们的曲线下面积(AUC)、准确度、灵敏度、特异度。使用临床校正曲线与临床决策曲线对模型进行评估与对比。结果综合模型预测pCR的效能最佳,其AUC值在训练集与验证集分别达0.92、0.85;其次为Delta超声组学模型,AUC分别为0.80、0.82;传统影像模型效能最低,AUC分别为0.67、0.72。临床校准曲线显示综合模型预测值与实际值一致性较高,临床决策曲线显示综合模型优于其他两种模型。结论Delta超声组学是早期预测乳腺癌NAT疗效的标记物。基于Delta超声组学结合临床病理指标构建的综合模型可作为早期准确预测NAT疗效的评估手段。

一种具有1~128倍可变增益放大器的低功耗Sigma⁃Delta ADC

为满足传感器应用的低功耗需求,设计并实现了一种低功耗Sigma⁃Delta模数转换器(ADC)芯片。该ADC采用一阶全差分开关电容Sigma⁃Delta调制器,且集成了可编程增益放大器(PGA)和Bandgap;使用1.5 bit量化结构,相较于1 bit量化结构减小了3 dB的量化误差;使用优化的反馈电路,减小了电容失配引入的误差;PGA采用轨到轨的运放电路拓扑,增大了整个芯片的电压适应范围。基于180 nm CMOS工艺对该ADC进行了设计和流片。测试结果表明:该Sigma⁃Delta ADC在采样频率512 kHz、过采样率(OSR)为256时,峰值信噪谐波失真比(SNDR)和有效位数(ENOB)分别为75.29 dB和12.21 bit,芯片功耗仅为0.92 mW。芯片能在2.3~5.5 V宽电源电压范围内正常工作,可实现最大128 V/V的增益。适用于小型传感器的信号测量应用,可以满足小型传感器低功耗、高精度的需求。

首次从湖南猪源大肠杆菌中检出mcr-1阳性IncI2(Delta)质粒

近年来,由于抗生素耐药基因的广泛传播及多重耐药细菌的出现,导致抗生素的使用面临严峻挑战,致使毒性较强的多黏菌素又重新引起业界的重视,为此对多黏菌素耐药情况的研究也变得十分重要。为了调查畜牧场中多黏菌素耐药基因mcr-1的流行情况,本研究选择我国湖南省某猪场240份肠肛拭子样品,培养分离鉴定出含有mcr-1耐药基因的大肠杆菌菌株,选取多黏菌素等10种抗菌药物对分离的菌株进行耐药性试验,对所有含mcr-1耐药基因的大肠杆菌阳性株进行全基因组测序(whole-genome sequencing,WGS),采用多位点序列分型(multi-locus sequence typing,MLST)技术进行大肠杆菌的遗传多样性分析。研究结果表明,在分离出的172株大肠杆菌中,来自不同个体的9株携带mcr-1基因的大肠杆菌均表现出多重耐药现象;MLST分析共鉴定出ST10、ST196、ST46和ST5229共4种分型和4种血清型(O83:H5,O16:H7,O16:H51,O9:H4)。生物信息学分析显示,所有阳性菌株均未发现与mcr-1基因传播有关的典型可移动遗传元件ISApl1,但均检出可能会导致mcr-1传播的IV型分泌系统基因。质粒接合转移试验与单倍型的MLST多态性结果表明,mcr-1基因主要以质粒介导的水平传播为主。本研究是国际上首次在猪源细菌中检出常见于人医临床细菌的携带有mcr-1抗性基因的IncI2(Delta)质粒。

含未知输入的Delta算子切换系统观测器设计

对于一类满足一定秩条件的含有未知输入的Delta算子切换系统,提出一种全阶观测器模型,并根据Lyapunov稳定性理论,利用矩阵不等式方法得到观测器存在的条件,进而给出全阶观测器各参数矩阵的计算方法和步骤.通过数值算例验证了观测器设计方法的有效性.

油茶果动态抓取Delta机器人正运动学特性研究

针对传统D-H参数法求解机械臂运动学时过程比较复杂的问题,为满足油茶果动态抓取的要求,提出了一种基于旋量理论构建3-R(SS)2Delta机器人正运动学方程的方法。针对3-R(SS)2Delta机器人的结构进行分析;通过旋量理论的指数积公式对该机器人的正运动学特性进行研究,获得机器人的位姿变换矩阵;最后,通过搭建的Delta机器人试验平台运行标准门型轨迹,结果表明:Delta机器人末端执行器能够精准地对传送带上移动的油茶果进行抓取。对比分析正运动学方程的计算值和Delta机器人试验平台试验测量值,得到末端执行器位置值的位置误差为±0.3mm,验证了所提出方法对构建油茶果动态抓取Delta机器人正运动学方程的正确性及可行性,旨在为后续进行油茶果动态抓取的轨迹规划研究奠定基础。

基于事件触发的Delta算子网络控制系统故障检测

针对网络控制系统在高速采样情况下,网络中由于通信网络带宽受限发生时延和丢包所引起的故障问题,文中采用了基于事件触发机制和Delta算子相结合的故障检测方法。在对故障检测滤波器和控制器进行协同设计的同时,在Delta算子滤波器模型中加入构造向量,避免了参数设计时双线性项的产生。构造δ域的Lyapunov-Krasovskii泛函,对残差系统的稳定性和H∞性能进行分析。数值仿真实例验证了文中所提事件触发机制的有效性,并通过残差评价函数证明了其对故障的灵敏度较高。

Numerical study on local scour characteristics around submarine pipelines in the Yellow River Delta silty sandy soil under waves and currents

Due to their high reliability and cost-efficiency,submarine pipelines are widely used in offshore oil and gas resource engineering.Due to the interaction of waves,currents,seabed,and pipeline structures,the soil around submarine pipelines is prone to local scour,severely affecting their operational safety.With the Yellow River Delta as the research area and based on the renormalized group(RNG)k-εturbulence model and Stokes fifth-order wave theory,this study solves the Navier-Stokes(N-S)equation using the finite difference method.The volume of fluid(VOF)method is used to describe the fluid-free surface,and a threedimensional numerical model of currents and waves-submarine pipeline-silty sandy seabed is established.The rationality of the numerical model is verified using a self-built waveflow flume.On this basis,in this study,the local scour development and characteristics of submarine pipelines in the Yellow River Delta silty sandy seabed in the prototype environment are explored and the influence of the presence of pipelines on hydrodynamic features such as surrounding flow field,shear stress,and turbulence intensity is analyzed.The results indicate that(1)local scour around submarine pipelines can be divided into three stages:rapid scour,slow scour,and stable scour.The maximum scour depth occurs directly below the pipeline,and the shape of the scour pits is asymmetric.(2)As the water depth decreases and the pipeline suspension height increases,the scour becomes more intense.(3)When currents go through a pipeline,a clear stagnation point is formed in front of the pipeline,and the flow velocity is positively correlated with the depth of scour.This study can provide a valuable reference for the protection of submarine pipelines in this area.

一种应用于物联网传感器的伪三阶Delta-Sigma调制器

针对物联网传感器难以同时满足高分辨率与低功耗的瓶颈问题,本文设计了一种伪三阶离散时间delta-sigma调制器.该架构将一阶无源噪声整形SAR(Successive Approximation Register)量化器嵌入传统二阶delta-sigma调制器以实现更强的噪声整形能力.本文设计允许系统在更低的过采样率(Over Sampling Ratio,OSR)下获取更高的峰值SQNR(Signal-to-Quantizing Noise Ratio),有效缓解了系统精度和功耗之间的设计矛盾,并且减少了有源积分器的使用.针对传统有源加法器高功耗和无源加法器存在衰减不确定性的问题,本文提出了一种新型前馈求和量化电路,它具有对衰减不敏感的优势并且降低了第二级有源积分器的驱动压力,这进一步降低了系统的功耗.本文提出的delta-sigma调制器采用180 nm CMOS(Complementary Metal Oxide Semiconductor)工艺制造并测试.在电源电压1.4 V下,芯片测试功耗为47.2μW.在带宽为8 kHz的测试条件下,调制器的DR(Dynamic Range)、峰值SNDR(Signal-to-Noise and Distortion Ratio)和SFDR(Spurious-Free Dynamic Range)分别为97.2 dB,96.6 dB和114.4 dB.因此,Schreier和Walden的SNDR FoM(Figure of Merit)优值达到了178.9 dB和0.053 pJ/step.本文提出的伪三阶delta-sigma调制器在功耗和分辨率之间实现了较好的权衡,为物联网领域的低功耗高分辨率调制器设计提供了较好的解决方案.