Multi-level programmable photonic integrated circuits(PICs)and optical metasurfaces have gained widespread attention in many fields,such as neuromorphic photonics,opticalcommunications,and quantum information.In this ...Multi-level programmable photonic integrated circuits(PICs)and optical metasurfaces have gained widespread attention in many fields,such as neuromorphic photonics,opticalcommunications,and quantum information.In this paper,we propose pixelated programmable Si_(3)N_(4)PICs with record-high 20-level intermediate states at 785 nm wavelength.Such flexibility in phase or amplitude modulation is achieved by a programmable Sb_(2)S_(3)matrix,the footprint of whose elements can be as small as 1.2μm,limited only by the optical diffraction limit of anin-house developed pulsed laser writing system.We believe our work lays the foundation for laser-writing ultra-high-level(20 levels and even more)programmable photonic systems and metasurfaces based on phase change materials,which could catalyze diverse applications such as programmable neuromorphic photonics,biosensing,optical computing,photonic quantum computing,and reconfigurable metasurfaces.展开更多
Elastic metamaterials with unusual elastic properties offer unprecedented ways to modulate the polarization and propagation of elastic waves.However,most of them rely on the resonant structural components,and thus are...Elastic metamaterials with unusual elastic properties offer unprecedented ways to modulate the polarization and propagation of elastic waves.However,most of them rely on the resonant structural components,and thus are frequency-dependent and unchangeable.Here,we present a reconfigurable 2D mechanism-based metamaterial which possesses transformable and frequency-independent elastic properties.Based on the proposed mechanism-based metamaterial,interesting functionalities,such as ternarycoded elastic wave polarizer and programmable refraction,are demonstrated.Particularly,unique ternary-coded polarizers,with 1-trit polarization filtering and 2-trit polarization separating of longitudinal and transverse waves,are first achieved.Then,the strong anisotropy of the proposed metamaterial is harnessed to realize positive-negative bi-refraction,only-positive refraction,and only-negative refraction.Finally,the wave functions with detailed microstructures are numerically verified.展开更多
In this work,a novel one-time-programmable memory unit based on a Schottky-type p-GaN diode is proposed.During the programming process,the junction switches from a high-resistance state to a low-resistance state throu...In this work,a novel one-time-programmable memory unit based on a Schottky-type p-GaN diode is proposed.During the programming process,the junction switches from a high-resistance state to a low-resistance state through Schottky junction breakdown,and the state is permanently preserved.The memory unit features a current ratio of more than 10^(3),a read voltage window of 6 V,a programming time of less than 10^(−4)s,a stability of more than 108 read cycles,and a lifetime of far more than 10 years.Besides,the fabrication of the device is fully compatible with commercial Si-based GaN process platforms,which is of great significance for the realization of low-cost read-only memory in all-GaN integration.展开更多
As the country continues to promote the development of intelligent manufacturing,all industries are carrying out enterprise automation upgrading,the Pearl River Delta Intelligent Manufacturing Conference held in March...As the country continues to promote the development of intelligent manufacturing,all industries are carrying out enterprise automation upgrading,the Pearl River Delta Intelligent Manufacturing Conference held in March 2024 provides a direction guide for each enterprise on how to integrate the intelligent manufacturing technology into each link and provide direction guidance for enterprises to create new models and new business formats.College teachers,in focusing on the teaching process,should closely match the enterprise and social needs and cultivate excellent students.As the core controller of automation control,the application of programmable controllers in teaching is particularly important.In practical classes,by setting progressive difficulty,project guidance,team collaboration,and other links,students can master the automation equipment design of programmable control in repeated practice.展开更多
Chip-scale programmable optical signal processors are often used to flexibly manipulate the optical signals for satisfying the demands in various applications,such as lidar,radar,and artificial intelligence.Silicon ph...Chip-scale programmable optical signal processors are often used to flexibly manipulate the optical signals for satisfying the demands in various applications,such as lidar,radar,and artificial intelligence.Silicon photonics has unique advantages of ultra-high integration density as well as CMOS compatibility,and thus makes it possible to develop large-scale programmable optical signal processors.The challenge is the high silicon waveguides propagation losses and the high calibration complexity for all tuning elements due to the random phase errors.In this paper,we propose and demonstrate a programmable silicon photonic processor for the first time by introducing low-loss multimode photonic waveguide spirals and low-random-phase-error Mach-Zehnder switches.The present chip-scale programmable silicon photonic processor comprises a 1×4 variable power splitter based on cascaded Mach-Zehnder couplers(MZCs),four Ge/Si photodetectors,four channels of thermally-tunable optical delaylines.Each channel consists of a continuously-tuning phase shifter based on a waveguide spiral with a micro-heater and a digitally-tuning delayline realized with cascaded waveguide-spiral delaylines and MZSs for 5.68 ps time-delay step.Particularly,these waveguide spirals used here are designed to be as wide as 2μm,enabling an ultralow propagation loss of 0.28 dB/cm.Meanwhile,these MZCs and MZSs are designed with 2-μm-wide arm waveguides,and thus the random phase errors in the MZC/MZS arms are negligible,in which case the calibration for these MZSs/MZCs becomes easy and furthermore the power consumption for compensating the phase errors can be reduced greatly.Finally,this programmable silicon photonic processor is demonstrated successfully to verify a number of distinctively different functionalities,including tunable time-delay,microwave photonic beamforming,arbitrary optical signal filtering,and arbitrary waveform generation.展开更多
Cyberattacks targeting industrial control systems(ICS)are becoming more sophisticated and advanced than in the past.A programmable logic controller(PLC),a core component of ICS,controls and monitors sensors and actuat...Cyberattacks targeting industrial control systems(ICS)are becoming more sophisticated and advanced than in the past.A programmable logic controller(PLC),a core component of ICS,controls and monitors sensors and actuators in the field.However,PLC has memory attack threats such as program injection and manipulation,which has long been a major target for attackers,and it is important to detect these attacks for ICS security.To detect PLC memory attacks,a security system is required to acquire and monitor PLC memory directly.In addition,the performance impact of the security system on the PLC makes it difficult to apply to the ICS.To address these challenges,this paper proposes a system to detect PLC memory attacks by continuously acquiring and monitoring PLC memory.The proposed system detects PLC memory attacks by acquiring the program blocks and block information directly from the same layer as the PLC and then comparing them in bytes with previous data.Experiments with Siemens S7-300 and S7-400 PLC were conducted to evaluate the PLC memory detection performance and performance impact on PLC.The experimental results demonstrate that the proposed system detects all malicious organization block(OB)injection and data block(DB)manipulation,and the increment of PLC cycle time,the impact on PLC performance,was less than 1 ms.The proposed system detects PLC memory attacks with a simpler detection method than earlier studies.Furthermore,the proposed system can be applied to ICS with a small performance impact on PLC.展开更多
This article presents an integrated current mode configurable analog block(CAB)system for field-programmable analog array(FPAA).The proposed architecture is based on the complementary metal-oxide semiconductor(CMOS)tr...This article presents an integrated current mode configurable analog block(CAB)system for field-programmable analog array(FPAA).The proposed architecture is based on the complementary metal-oxide semiconductor(CMOS)transistor level design where MOSFET transistors operating in the saturation region are adopted.The proposed CAB architecture is designed to implement six of thewidely used current mode operations in analog processing systems:addition,subtraction,integration,multiplication,division,and pass operation.The functionality of the proposed CAB is demonstrated through these six operations,where each operation is chosen based on the user’s selection in the CAB interface system.The architecture of the CAB system proposes an optimized way of designing and integrating only three functional cells with the interface circuitry to achieve the six operations.Furthermore,optimized programming and digital tuning circuitry are implemented in the architecture to control and interface with the functional cells.Moreover,these designed programming and tuning circuitries play an essential role in optimizing the performance of the proposed design.Simulation of the proposed CMOS Transistor Based CAB system is carried out using Tanner EDA Tools in 0.35μm standard CMOS technology.The design uses a±1.5 V power supply and results in maximum 3 dB bandwidth of 34.9 MHz and an approximate size of 0.0537 mm2.This demonstrates the advantages of the design over the current state-of-the-art designs presented for comparison in this article.Consequently,the proposed design has a clear aspect of simplicity,low power consumption,and high bandwidth operation,which makes it a suitable candidate for mobile telecommunications applications.展开更多
目的:评估2011—2020年四川省结核病防治经费投入产生的社会效益,为制定新时期中长期发展规划提供参考依据。方法:采用回顾性研究方法,从“结核病管理信息系统”和“传染病监测”系统中收集四川省2011—2020年(“十二五”和“十三五”期...目的:评估2011—2020年四川省结核病防治经费投入产生的社会效益,为制定新时期中长期发展规划提供参考依据。方法:采用回顾性研究方法,从“结核病管理信息系统”和“传染病监测”系统中收集四川省2011—2020年(“十二五”和“十三五”期间)涂阳肺结核患者治疗转归情况和肺结核患者劳动人口比例,结合四川省统计年鉴和全国结核病防治规划终期评估规划自评调查表等获取经费资料和人均国内生产总值(GDP),采用卫生经济学中常用的成本-效果、成本-效用、成本-效益等3种分析方法估算10年间结核病防治经费投入的社会效果、社会效用和社会效益,并对比分析“十二五”和“十三五”期间的估算结果。结果:2011—2020年,四川省共投入结核病防治经费76032.60万元,成功治疗涂阳肺结核患者160167例,避免了696899名健康人受到传染,挽救了1155277个伤残调整寿命年(disability adjusted life year,DALY),为社会节约医疗费用6.05亿元,挽回社会经济损失约370.32亿元。每投入1091.01元即可避免1名健康人被传染,每投入658.13元即可挽回1个DALY,每投入1元即可产生49.50元的社会经济效益。“十三五”期间带来的总社会效益(209.22亿元)较“十二五”期间(167.14亿元)增长了25.18%[(209.22-167.14)/167.14],但政府每投入1元的结核病防治经费产生的社会效益(47.56元)较“十二五”期间(52.17元)减少了4.61元。结论:2011—2020年间各级政府和国际项目对四川省结核病防控工作投入的经费产生了较好的社会效果、效用和效益。建议在保持目前经费投入力度的基础上,各级政府进一步加大投入,尤其对病原学阳性肺结核患者的发现和治疗管理力度,以期产生更高的社会效益。展开更多
目的了解北京市3岁前儿童非免疫规划(non-expanded programme on immunization,non-EPI)疫苗接种水平和变化趋势,为加强对非EPI疫苗管理提供参考。方法2023年9月1日,采用系统抽样方法随机抽取北京市免疫规划信息管理系统中2011、2014、2...目的了解北京市3岁前儿童非免疫规划(non-expanded programme on immunization,non-EPI)疫苗接种水平和变化趋势,为加强对非EPI疫苗管理提供参考。方法2023年9月1日,采用系统抽样方法随机抽取北京市免疫规划信息管理系统中2011、2014、2017和2020年的8月份出生的所有儿童个案,分析各年份抽样儿童3岁前接种非EPI疫苗的种类及户籍分布、首剂接种比例、全程免疫完成比例及其变化趋势。结果研究对象共108210名。非EPI疫苗总剂次分别为88019、109442、104451和130501剂次。研究对象3岁前水痘疫苗、肠道病毒71型灭活疫苗(EV71疫苗)和吸附无细胞百白破灭活脊髓灰质炎和b型流感嗜血杆菌(结合)联合疫苗(DTaP-IPV-Hib五联疫苗)首剂接种比例均逐年增加,由最初的<10%分别增加至82.20%、61.07%和39.20%;2020年研究对象中,接种总剂次居前5位的非免疫规划疫苗是13价肺炎疫苗、DTaP-IPV-Hib五联疫苗、EV71疫苗、5价轮状病毒疫苗和水痘疫苗,首剂接种比例分别为48.30%、39.20%、61.07%、30.58%和82.20%,京籍儿童均高于非京籍儿童(P<0.05);3岁前DTaP-IPV-Hib五联疫苗、EV71疫苗和5价轮状病毒疫苗在接种首剂后的多剂次疫苗的全程免疫完成比例分别为92.26%、96.56%和94.37%,京籍儿童均高于非京籍儿童(P<0.05)。结论北京市3岁前儿童非EPI疫苗接种数量和新疫苗种类不断增加,全程接种依从性较高。而在非EPI疫苗的首剂接种比例和非京籍儿童中均需进一步提高。建议开展相关影响因素研究,加强非免疫规划疫苗的技术指导,进一步提高全市非免疫规划疫苗接种数量和质量。展开更多
基金funded by the National Nature Science Foundation of China(Grant Nos.52175509 and 52130504)National Key Research and Development Program of China(2017YFF0204705)2021 Postdoctoral Innovation Research Plan of Hubei Province(0106100226)。
文摘Multi-level programmable photonic integrated circuits(PICs)and optical metasurfaces have gained widespread attention in many fields,such as neuromorphic photonics,opticalcommunications,and quantum information.In this paper,we propose pixelated programmable Si_(3)N_(4)PICs with record-high 20-level intermediate states at 785 nm wavelength.Such flexibility in phase or amplitude modulation is achieved by a programmable Sb_(2)S_(3)matrix,the footprint of whose elements can be as small as 1.2μm,limited only by the optical diffraction limit of anin-house developed pulsed laser writing system.We believe our work lays the foundation for laser-writing ultra-high-level(20 levels and even more)programmable photonic systems and metasurfaces based on phase change materials,which could catalyze diverse applications such as programmable neuromorphic photonics,biosensing,optical computing,photonic quantum computing,and reconfigurable metasurfaces.
基金supported by the National Key R&D Program of China(No.2021YFE0110900)the National Natural Science Foundation of China(Nos.U22B2078 and 11991033)。
文摘Elastic metamaterials with unusual elastic properties offer unprecedented ways to modulate the polarization and propagation of elastic waves.However,most of them rely on the resonant structural components,and thus are frequency-dependent and unchangeable.Here,we present a reconfigurable 2D mechanism-based metamaterial which possesses transformable and frequency-independent elastic properties.Based on the proposed mechanism-based metamaterial,interesting functionalities,such as ternarycoded elastic wave polarizer and programmable refraction,are demonstrated.Particularly,unique ternary-coded polarizers,with 1-trit polarization filtering and 2-trit polarization separating of longitudinal and transverse waves,are first achieved.Then,the strong anisotropy of the proposed metamaterial is harnessed to realize positive-negative bi-refraction,only-positive refraction,and only-negative refraction.Finally,the wave functions with detailed microstructures are numerically verified.
基金supported in part by the National Key Research and Development Program of China under Grant 2022YFB3604400in part by the Youth Innovation Promotion Association of Chinese Academy Sciences (CAS)+4 种基金in part by the CAS-Croucher Funding Scheme under Grant CAS22801in part by National Natural Science Foundation of China under Grant 62334012, Grant 62074161, Grant 62004213, Grant U20A20208, and Grant 62304252in part by the Beijing Municipal Science and Technology Commission project under Grant Z201100008420009 and Grant Z211100007921018in part by the University of CASin part by the IMECAS-HKUST-Joint Laboratory of Microelectronics
文摘In this work,a novel one-time-programmable memory unit based on a Schottky-type p-GaN diode is proposed.During the programming process,the junction switches from a high-resistance state to a low-resistance state through Schottky junction breakdown,and the state is permanently preserved.The memory unit features a current ratio of more than 10^(3),a read voltage window of 6 V,a programming time of less than 10^(−4)s,a stability of more than 108 read cycles,and a lifetime of far more than 10 years.Besides,the fabrication of the device is fully compatible with commercial Si-based GaN process platforms,which is of great significance for the realization of low-cost read-only memory in all-GaN integration.
基金Guangdong Province Education Science Planning Project(Higher Education Special)“Construction and Practice of Applied Innovation Education System for Applied Undergraduate Mechanical Majors”(Project number:2023GXJK638)。
文摘As the country continues to promote the development of intelligent manufacturing,all industries are carrying out enterprise automation upgrading,the Pearl River Delta Intelligent Manufacturing Conference held in March 2024 provides a direction guide for each enterprise on how to integrate the intelligent manufacturing technology into each link and provide direction guidance for enterprises to create new models and new business formats.College teachers,in focusing on the teaching process,should closely match the enterprise and social needs and cultivate excellent students.As the core controller of automation control,the application of programmable controllers in teaching is particularly important.In practical classes,by setting progressive difficulty,project guidance,team collaboration,and other links,students can master the automation equipment design of programmable control in repeated practice.
基金We are grateful for financial supports from National Major Research and Development Program(No.2018YFB2200200)National Science Fund for Distinguished Young Scholars(61725503)+1 种基金Zhejiang Provincial Natural Science Foundation(LZ18F050001,LGF21F050003)National Natural Science Foundation of China(NSFC)(91950205,6191101294,11861121002,61905209,62175214,62111530147).
文摘Chip-scale programmable optical signal processors are often used to flexibly manipulate the optical signals for satisfying the demands in various applications,such as lidar,radar,and artificial intelligence.Silicon photonics has unique advantages of ultra-high integration density as well as CMOS compatibility,and thus makes it possible to develop large-scale programmable optical signal processors.The challenge is the high silicon waveguides propagation losses and the high calibration complexity for all tuning elements due to the random phase errors.In this paper,we propose and demonstrate a programmable silicon photonic processor for the first time by introducing low-loss multimode photonic waveguide spirals and low-random-phase-error Mach-Zehnder switches.The present chip-scale programmable silicon photonic processor comprises a 1×4 variable power splitter based on cascaded Mach-Zehnder couplers(MZCs),four Ge/Si photodetectors,four channels of thermally-tunable optical delaylines.Each channel consists of a continuously-tuning phase shifter based on a waveguide spiral with a micro-heater and a digitally-tuning delayline realized with cascaded waveguide-spiral delaylines and MZSs for 5.68 ps time-delay step.Particularly,these waveguide spirals used here are designed to be as wide as 2μm,enabling an ultralow propagation loss of 0.28 dB/cm.Meanwhile,these MZCs and MZSs are designed with 2-μm-wide arm waveguides,and thus the random phase errors in the MZC/MZS arms are negligible,in which case the calibration for these MZSs/MZCs becomes easy and furthermore the power consumption for compensating the phase errors can be reduced greatly.Finally,this programmable silicon photonic processor is demonstrated successfully to verify a number of distinctively different functionalities,including tunable time-delay,microwave photonic beamforming,arbitrary optical signal filtering,and arbitrary waveform generation.
基金supported by the Korea WESTERN POWER(KOWEPO)(2022-Commissioned Research-11,Development of Cyberattack Detection Technology for New and Renewable Energy Control System Using AI(Artificial Intelligence),50%)the Institute of Information&Communications Technology Planning&Evaluation(IITP)grant funded by the Korea government(MSIT)(No.2021-0-01806,Development of Security by Design and Security Management Technology in Smart Factory,40%)the Gachon University Research Fund of 2023(GCU-202110280001,10%).
文摘Cyberattacks targeting industrial control systems(ICS)are becoming more sophisticated and advanced than in the past.A programmable logic controller(PLC),a core component of ICS,controls and monitors sensors and actuators in the field.However,PLC has memory attack threats such as program injection and manipulation,which has long been a major target for attackers,and it is important to detect these attacks for ICS security.To detect PLC memory attacks,a security system is required to acquire and monitor PLC memory directly.In addition,the performance impact of the security system on the PLC makes it difficult to apply to the ICS.To address these challenges,this paper proposes a system to detect PLC memory attacks by continuously acquiring and monitoring PLC memory.The proposed system detects PLC memory attacks by acquiring the program blocks and block information directly from the same layer as the PLC and then comparing them in bytes with previous data.Experiments with Siemens S7-300 and S7-400 PLC were conducted to evaluate the PLC memory detection performance and performance impact on PLC.The experimental results demonstrate that the proposed system detects all malicious organization block(OB)injection and data block(DB)manipulation,and the increment of PLC cycle time,the impact on PLC performance,was less than 1 ms.The proposed system detects PLC memory attacks with a simpler detection method than earlier studies.Furthermore,the proposed system can be applied to ICS with a small performance impact on PLC.
基金This work was supported in part by the Geran Galakan Penyelidik Muda Grant(GGPM),Universiti Kebangsaan Malaysia,Selangor,Malaysia under grant GGPM-2021-055.
文摘This article presents an integrated current mode configurable analog block(CAB)system for field-programmable analog array(FPAA).The proposed architecture is based on the complementary metal-oxide semiconductor(CMOS)transistor level design where MOSFET transistors operating in the saturation region are adopted.The proposed CAB architecture is designed to implement six of thewidely used current mode operations in analog processing systems:addition,subtraction,integration,multiplication,division,and pass operation.The functionality of the proposed CAB is demonstrated through these six operations,where each operation is chosen based on the user’s selection in the CAB interface system.The architecture of the CAB system proposes an optimized way of designing and integrating only three functional cells with the interface circuitry to achieve the six operations.Furthermore,optimized programming and digital tuning circuitry are implemented in the architecture to control and interface with the functional cells.Moreover,these designed programming and tuning circuitries play an essential role in optimizing the performance of the proposed design.Simulation of the proposed CMOS Transistor Based CAB system is carried out using Tanner EDA Tools in 0.35μm standard CMOS technology.The design uses a±1.5 V power supply and results in maximum 3 dB bandwidth of 34.9 MHz and an approximate size of 0.0537 mm2.This demonstrates the advantages of the design over the current state-of-the-art designs presented for comparison in this article.Consequently,the proposed design has a clear aspect of simplicity,low power consumption,and high bandwidth operation,which makes it a suitable candidate for mobile telecommunications applications.
文摘目的:评估2011—2020年四川省结核病防治经费投入产生的社会效益,为制定新时期中长期发展规划提供参考依据。方法:采用回顾性研究方法,从“结核病管理信息系统”和“传染病监测”系统中收集四川省2011—2020年(“十二五”和“十三五”期间)涂阳肺结核患者治疗转归情况和肺结核患者劳动人口比例,结合四川省统计年鉴和全国结核病防治规划终期评估规划自评调查表等获取经费资料和人均国内生产总值(GDP),采用卫生经济学中常用的成本-效果、成本-效用、成本-效益等3种分析方法估算10年间结核病防治经费投入的社会效果、社会效用和社会效益,并对比分析“十二五”和“十三五”期间的估算结果。结果:2011—2020年,四川省共投入结核病防治经费76032.60万元,成功治疗涂阳肺结核患者160167例,避免了696899名健康人受到传染,挽救了1155277个伤残调整寿命年(disability adjusted life year,DALY),为社会节约医疗费用6.05亿元,挽回社会经济损失约370.32亿元。每投入1091.01元即可避免1名健康人被传染,每投入658.13元即可挽回1个DALY,每投入1元即可产生49.50元的社会经济效益。“十三五”期间带来的总社会效益(209.22亿元)较“十二五”期间(167.14亿元)增长了25.18%[(209.22-167.14)/167.14],但政府每投入1元的结核病防治经费产生的社会效益(47.56元)较“十二五”期间(52.17元)减少了4.61元。结论:2011—2020年间各级政府和国际项目对四川省结核病防控工作投入的经费产生了较好的社会效果、效用和效益。建议在保持目前经费投入力度的基础上,各级政府进一步加大投入,尤其对病原学阳性肺结核患者的发现和治疗管理力度,以期产生更高的社会效益。
文摘目的了解北京市3岁前儿童非免疫规划(non-expanded programme on immunization,non-EPI)疫苗接种水平和变化趋势,为加强对非EPI疫苗管理提供参考。方法2023年9月1日,采用系统抽样方法随机抽取北京市免疫规划信息管理系统中2011、2014、2017和2020年的8月份出生的所有儿童个案,分析各年份抽样儿童3岁前接种非EPI疫苗的种类及户籍分布、首剂接种比例、全程免疫完成比例及其变化趋势。结果研究对象共108210名。非EPI疫苗总剂次分别为88019、109442、104451和130501剂次。研究对象3岁前水痘疫苗、肠道病毒71型灭活疫苗(EV71疫苗)和吸附无细胞百白破灭活脊髓灰质炎和b型流感嗜血杆菌(结合)联合疫苗(DTaP-IPV-Hib五联疫苗)首剂接种比例均逐年增加,由最初的<10%分别增加至82.20%、61.07%和39.20%;2020年研究对象中,接种总剂次居前5位的非免疫规划疫苗是13价肺炎疫苗、DTaP-IPV-Hib五联疫苗、EV71疫苗、5价轮状病毒疫苗和水痘疫苗,首剂接种比例分别为48.30%、39.20%、61.07%、30.58%和82.20%,京籍儿童均高于非京籍儿童(P<0.05);3岁前DTaP-IPV-Hib五联疫苗、EV71疫苗和5价轮状病毒疫苗在接种首剂后的多剂次疫苗的全程免疫完成比例分别为92.26%、96.56%和94.37%,京籍儿童均高于非京籍儿童(P<0.05)。结论北京市3岁前儿童非EPI疫苗接种数量和新疫苗种类不断增加,全程接种依从性较高。而在非EPI疫苗的首剂接种比例和非京籍儿童中均需进一步提高。建议开展相关影响因素研究,加强非免疫规划疫苗的技术指导,进一步提高全市非免疫规划疫苗接种数量和质量。
