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面向环境射频能量收集的宽频整流电路

应用科技 2024年第4期51卷 129-135页

作者：张欣何忠奇闫丽萍刘长军四川大学电子信息学院四川成都610064 宜宾四川大学产业技术研究院四川宜宾644000

整流电路是射频能量回收系统的核心,能够将射频能量转换为直流。但由于整流电路中使用的二极管具有非线性特性,导致整流效率会随频率变化而降低。为解决这一问题,本文提出一种具有宽频带的整流电路,它通过采用与二极管串联的短路线、与... 详细信息

整流电路是射频能量回收系统的核心,能够将射频能量转换为直流。但由于整流电路中使用的二极管具有非线性特性,导致整流效率会随频率变化而降低。为解决这一问题,本文提出一种具有宽频带的整流电路,它通过采用与二极管串联的短路线、与二极管并联的开路线以及多级微带线结构来调整阻抗匹配,实现了在宽频带范围内的高转换效率。设计的整流电路在0 dBm的输入功率下,从1.7~2.7 GHz,均达到50%的整流转换效率,最高整流转换效率为63.3%。该宽带整流电路可以运用在无线能量收集系统中。

关键词：射频能量收集整流电路宽频高效率二极管非线性阻抗匹配微带线

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Application of pulsed chemical vapor deposition on the SiO_(2)-coated TiO_(2) production within a rotary reactor at room temperature

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Chinese Journal of Chemical Engineering 2022年第5期35卷 22-31页

作者： Ke Yang Shan Zhong Hairong Yue Siyang Tang Kui Ma changjun liu Kai Qiao Bin Liang School of Chemical Engineering Sichuan UniversityChengdu 610065China Institute of New Energy and Low-carbon Technology Chengdu 610207China

Pulsed chemical vapor deposition(P-CVD)is a promising technology for the surface modification of TiO_(2) *** the scale-up application of P-CVD,a custom-designed rotary reactor and corresponding coating process at room temperature was developed in the present *** obtained SiO_(2)-coated TiO_(2) particles were characterized by various measures including high-resolution transmission electron microscope,Fourier transform infrared spectroscopy,X-ray diffraction,*** results illustrated that the SiO_(2) films with a thickness of(3.7±0.7)nm were successfully deposited onto the surface of TiO_(2) *** to the dye degradation tests and acid solubility measurement,the deposited film can effectively inhibit the photocatalytic activity and enhance the weatherability of the TiO_(2) *** potential measurements showed that the SiO_(2)-coated TiO_(2) is possible to be stably dispersed in the pH range of 6.9–*** coating process made the whiteness of TiO_(2) particles decreased slightly but still sufficient(97.3±0.1)for ***,the properties of the TiO_(2) particles coated by PCVD were compared with the particles coated by traditional wet chemical *** is shown that the P-CVD can produce thinner but denser films with better photoactivity suppression *** developed coating process within the rotary reactor was proved practically feasible and convenient for the scale-up production of SiO_(2)-coated TiO_(2) via P-CVD.

关键词： Film Pulsed-CVD Scale-up Deactivation Pigmentary properties

临床医学专业学生对公共卫生课程认知与态度的调查研究

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中国高等医学教育 2024年第3期 75-77页

作者：刘颖郭怀兰郑弘刘长俊张垚张苗陈晋湖北医药学院公共卫生与健康学院湖北十堰442000

目的:明确临床医学专业学生对公共卫生课程教学评价现况与存在问题,优化公共卫生课程体系建设方案。方法:采用定量与定性研究相结合的方法,分析临床医学专业学生对公共卫生课程的认知、满意度与学习效果。结果:临床医学专业学生对公共... 详细信息

目的:明确临床医学专业学生对公共卫生课程教学评价现况与存在问题,优化公共卫生课程体系建设方案。方法:采用定量与定性研究相结合的方法,分析临床医学专业学生对公共卫生课程的认知、满意度与学习效果。结果:临床医学专业学生对公共卫生课程的认知情况整体较好,但仍有7%的学生对公共卫生课程不感兴趣,约10%的学生对教学方法不满意;10.6%的学生觉得公共卫生课程学习效果差。结论:应加强临床医学专业学生公共卫生思想教育,采用先进教学模式,合理增减、整合、序化教学内容,增加考核方法多样性,加大形成性评价力度。

关键词：临床医学专业公共卫生课程预防医学认知态度

The quasi-activity coefficients of non-electrolytes in aqueous solution with organic ions and its application on the phase splitting behaviors prediction for CO_(2) absorption

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Chinese Journal of Chemical Engineering 2022年第3期35卷 316-323页

作者： Xiaomeng Zhao Xingyu Li changjun liu Shan Zhong Houfang Lu Hairong Yue Kui Ma Lei Song Siyang Tang Bin Liang Laboratory of Low-Carbon Technology and Chemical Reaction Engineering School of Chemical EngineeringSichuan UniversityChengdu 610065China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610207China

CO_(2)capture with a low energy consumption is of important application significance for reducing CO_(2)*** phase-change absorbent developed in recent years shows its potential for low-energy CO_(2)*** unclear phase-splitting rule hinders the efficient development of CO_(2)phase-change *** predict phase-splitting behaviors of mono/poly-amine-organic solvent-water system with various concentrations,a quasi-activity coefficient was developed based on Debye&Mc Aulay equation and some Density function theory *** models based on Debye&Mc Aulay equation were developed with different ion radius,descriptors or poly-amine-CO_(2)*** phase-splitting boundary was drawn on the model with the best *** quasi-activity coefficient would provide guidance for the phase-splitting systems development,especially for polyamines.

关键词： CO_(2)absorption Polyamines Biphasic system Phase-splitting Salting-out effect

Measurements of the effective mass transfer areas for the gas–liquid rotating packed bed

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Chinese Journal of Chemical Engineering 2023年第3期55卷 13-19页

作者： Wen Tian Junyi Ji Hongjiao Li changjun liu Lei Song Kui Ma Siyang Tang Shan Zhong Hairong Yue Bin Liang Low-Carbon Technology and Chemical Reaction Engineering Laboratory School of Chemical EngineeringSichuan UniversityChengdu 610065China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610207China

Rotating packed bed(RPB) is one of the most effective gas–liquid mass transfer enhancement reactors, its effective specific mass transfer area(ae) is critical to understand the mass transfer process. By using the NaOH–CO_(2) chemical absorption method, the aevalues of three RPB reactors with different rotor sizes were measured under different operation conditions. The results showed that the high gravity factor and liquid flow rate were major affecting factors, while the gas flow rate exhibited minor *** radius of packing is the dominant equipment factor to affect aevalue. The results indicated that the contact area depends on the dispersion of the liquid phase, thus the centrifugal force of rotating packed bed greatly influenced the aevalue. Moreover, the measured ae/ap(effective specific mass transfer area/specific surface area of packing) values were fitted with dimensionless correlation formulas. The unified correlation formula with dimensionless bed size parameter can well predict the experimental data and the prediction errors were within 15%.

关键词： Gas-liquid Chemical absorption Mass transfer areas Rotating packed bed(RPB)

一株基因Ⅲ型禽呼肠孤病毒变异株的分离及其灭活疫苗免疫原性初步评价

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中国家禽 2024年第8期46卷 69-75页

作者：刘芮李晓涵高金慧刘长军祁小乐李凯张艳萍崔红玉王素艳高玉龙高立中国农业科学院哈尔滨兽医研究所动物疫病防控全国重点实验室禽免疫抑制病创新团队黑龙江哈尔滨150069

为了解禽呼肠孤病毒(Avian reovirus,ARV)变异株在我国的流行情况及其生物学特性和致病特点,试验采集黑龙江省某企业送检的病鸡关节组织进行病毒分离,通过RT-PCR、序列分析及常见禽类外源病毒检测鉴定,进一步通过对体外复制能力、致病... 详细信息

为了解禽呼肠孤病毒(Avian reovirus,ARV)变异株在我国的流行情况及其生物学特性和致病特点,试验采集黑龙江省某企业送检的病鸡关节组织进行病毒分离,通过RT-PCR、序列分析及常见禽类外源病毒检测鉴定,进一步通过对体外复制能力、致病性、血清交叉中和能力及灭活疫苗免疫抗体水平检测,分析其致病性、抗原性和免疫原性。结果显示:成功从病鸡关节组织中分离到1株ARV,命名为ARV-HLJ21-1690401,该分离株位于基因Ⅲ型分支,与基因Ⅲ型参考株ISR5233和42563-4-2005遗传距离较近,氨基酸序列相似性为83.4%和81.7%,而与其他基因型分离株遗传距离较远;该分离株在LMH细胞上增殖良好,对鸡胚和SPF鸡均具有明显的致病性,可引起接种鸡胚90%死亡,接种6周龄SPF鸡可引起100%发病;该分离株具有良好的免疫原性,其制备的灭活疫苗免疫SPF鸡可诱导产生较好的抗体水平。综上所述,研究成功分离到一株具有致病性和良好免疫原性的基因Ⅲ型ARV变异株,为了解我国ARV变异株的流行及遗传进化特征提供了重要理论依据。

关键词：禽呼肠孤病毒基因Ⅲ型变异株致病性灭活疫苗

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光动力疗法在胆管癌诊疗中作用机制研究进展

分子影像学杂志 2024年第6期47卷 661-664页

作者：齐硕陈康周磊刘昌军田秉璋彭创成伟湖南省人民医院(湖南师范大学附属第一医院)肝胆外科湖南长沙410005 湖南省血吸虫病防治所(湖南省第三人民医院) 湖南岳阳414000

胆管癌是一种罕见但危险的肿瘤,具有早期诊断率低、预后不良等特点,临床上手术切除是根治胆管癌的有效手段,但术后复发率高,而放化疗、介入治疗疗效尚不尽满意。光动力疗法利用光敏剂和激光进行肿瘤治疗,在胆管癌应用中已取得了初步成效... 详细信息

胆管癌是一种罕见但危险的肿瘤,具有早期诊断率低、预后不良等特点,临床上手术切除是根治胆管癌的有效手段,但术后复发率高,而放化疗、介入治疗疗效尚不尽满意。光动力疗法利用光敏剂和激光进行肿瘤治疗,在胆管癌应用中已取得了初步成效,但关于光动力疗法对癌细胞的作用机制还需要深入研究。本文通过对光动力疗法在胆管癌治疗中免疫治疗、血管生成抑制、抗氧化剂及热休克蛋白等机制,以及对光动力疗法联合靶向药物/放射治疗联合作用做一综述,旨在为临床上胆管癌的治疗提供理论依据参考,以期为临床上胆管癌的综合治疗提供安全、有效的治疗手段。

关键词：光动力疗法胆管癌诊断作用机制进展

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数字孪生淠河建设实践与思考

中国水利 2024年第13期 50-56页

作者：陈胜李京兵王玉丽张锦堂刘昌军刘业森中国水利水电科学研究院北京100038 水利部防洪抗旱减灾工程技术研究中心北京100038 安徽省水文局合肥230022

数字孪生淠河根据淠河流域特征,以流域防洪需求为牵引,提出技术解决方案。在共享安徽省现有数据感知、网络传输、算力环境等基础上,建设内容包括流域数据底板、水利模型平台、水利知识平台等支撑平台,以及在上述支撑平台基础上建立防洪... 详细信息

数字孪生淠河根据淠河流域特征,以流域防洪需求为牵引,提出技术解决方案。在共享安徽省现有数据感知、网络传输、算力环境等基础上,建设内容包括流域数据底板、水利模型平台、水利知识平台等支撑平台,以及在上述支撑平台基础上建立防洪预报、预警、预演、预案“四预”应用。防洪“四预”应用以精细化洪水预报为预警、调度提供基础,洪水预警为下游圩区等保护对象提供多阶段预警,情景化洪水预演以实景化方式分析洪水影响,智能化方案实现防洪预案的快速、自动化生成。通过总结数字孪生淠河建设内容,进一步探讨数字孪生流域建设中存在的难点问题,为相关数字孪生流域建设提供借鉴。

关键词：淠河数字孪生流域圩区流域数据底板水利模型平台水利知识图谱 “四预”应用

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Semantic Consistency and Correctness Verification of Digital Traffic Rules

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Engineering 2024年第2期33卷 47-62页

作者： Lei Wan changjun Wang Daxin Luo Hang liu Sha Ma Weichao Hu Policy Standardand Patent DepartmentIntelligent Automotive Solution BUHuawei Technologies Co.Ltd.Beijing 100094China Research Institute for Road Safety of the Ministry of Public Security Beijing 100062China

The consensus of the automotive industry and traffic management authorities is that autonomous vehicles must follow the same traffic laws as human *** formal or digital methods,natural language traffic rules can be translated into machine language and used by autonomous *** this paper,a translation flow is *** the translation,a deeper examination is required,because the semantics of natural languages are rich and complex,and frequently contain hidden *** issue of how to ensure that digital rules are accurate and consistent with the original intent of the traffic rules they represent is both significant and *** response,we propose a method of formal verification that combines equivalence verification with model *** and reassuring digital traffic rules can be obtained by utilizing the proposed traffic rule digitization flow and verification *** addition,we offer a number of simulation applications that employ digital traffic rules to assess vehicle *** experimental findings indicate that our digital rules utilizing metric temporal logic(MTL)can be easily incorporated into simulation platforms and autonomous driving systems(ADS).

关键词： Autonomous driving Traffic rules Digitization Formalization Verification