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Science China Life Sciences 2025年第1期 297-299页

作者： Junbin zhou Rongli Wei Guanghan Fan Zhengxing Lian Xuanyu zhang Linsong Tang Zhetuo Qi Haiyang Xie Shusen Zheng Qiang Wei Xiao Xu Department of Hepatobiliary and Pancreatic Surgery People's Hospital of LishuiAffiliated Lishui Hospital of Wenzhou Medical UniversityThe First Affiliated Hospital of Lishui University NHFPC Key Laboratory of Combined Multi-Organ Transplantation Key Laboratory of Integrated Oncology and Intelligent Medicine of Zhejiang Province Department of Hepatobiliary and Pancreatic SurgeryHangzhou First People's Hospital Department of Hepatobiliary and Pancreatic Surgery The First Affiliated HospitalZhejiang University School of Medicine Department of Urology The Second Affiliated HospitalZhejiang University School of Medicine Department of Hepatobiliary and Pancreatic Surgery Department of Liver TransplantationShulan (Hangzhou) Hospital Hangzhou Medical College Zhejiang University School of Medicine

Dear Editor, Liver transplantation(LT) is the only curative therapy for patients with endstage liver disease(He et al., 2023; Ling et al., 2022). Post-transplant hypertriglyceridemia(PTHT), which has an incidence of up to 32.8% in 6 months after LT, is one of the major post-transplant complications(Toshima et al., 2020).

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Online differential pressure reset method with adaptive adjustment algorithm for variable chilled water flow control in central air-conditioning systems

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Building Simulation 2021年第5期14卷 1407-1422页

作者： Tianyi Zhao ying zhou Jili zhang Xiuming Li Institute of Building Energy School of Civil EngineeringFaculty of Infrastructure EngineeringDalian University of TechnologyDalian 116024China School of Metallurgy Northeastern UniversityShenyang 110819China

Central air-conditioning systems predominantly operate under partial load *** optimization of a differential pressure setpoint in the chilled water system of a central air-conditioning system leads to a more energy-efficient *** the differential pressure adjustment value based on the terminal user's real-time demand is one of the critical issues to be addressed during the optimal control ***,the online application of the differential pressure setpoint optimization method needs to be considered,along with the stability of the *** paper proposes a variable differential pressure reset method with an adaptive adjustment algorithm based on the Mamdani fuzzy *** proposed method was compared with differential pressure reset methods with reference to the chilled water differential temperature,outdoor temperature,and linear model based on the adjustment *** energy-saving potential,temperature control effect,and avoidance of the most unfavorable thermodynamic loop effects of the four methods were investigated *** results indicated that,while satisfying the terminal user's energy supply demand and ensuring the avoidance of the most unfavorable thermodynamic loop,the proposed adaptive adjustment algorithm also decreased the differential pressure setpoint value by 25.1%—59.1%and achieved energy savings of 10.6%-45.0%.By monitoring the valve position and supply air temperature of each terminal user,the proposed method exhibited suitable online adaptability and could be flexibly applied to buildings with random load changes.

关键词： central air-conditioning system variable water flow control most unfavorable thermodynamic loop differential pressure reset adaptive control

Multiscale topology optimization using feature-driven method

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Chinese Journal of Aeronautics 2020年第2期33卷 621-633页

作者： Zhao XU Weihong zhang ying zhou Jihong ZHU State IJR Center of Aerospace Design and Additive Manufacturing Northwestern Polytechnical UniversityXi’an 710072China

This paper presents a multiscale design method for simultaneous topology optimization of both macrostructures and *** features are extended as design primitives at both macro and micro scales and represented by Level Set Functions(LSFs).Parameters related to the locations,sizes,and orientations of macro and micro features are considered as design variables and optimized *** the overlapping areas of different macro features,embedded microstructures are optimally figured out as the solution of the corresponding sub-optimization,*** this study,the eXtended Finite Element Method(XFEM)is implemented for structural and sensitivity analyses with respect to design *** method has the advantage of using a fixed grid independent of the topology optimization *** homogenization procedure is applied to calculate the effective properties of considered microstructures in each macro *** examples are presented to illustrate the effectiveness of the proposed *** depict that the multiscale design cannot obviously improve structural stiffness compared with a solid-material design under the linear elastic condition.

关键词： Feature-driven method Level set function Multiscale design Topology optimization XFEM

Rational construction of hollow nanoboxes for long cycle life alkali metal ion batteries

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Journal of Materials Science & Technology 2022年第7期102卷 46-55页

作者： Zheng zhang ying Huang Xiang Li Zhiming zhou MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions School of Natural and Applied SciencesNorthwestern Polytechnical UniversityXi’an 710072China CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of Sciences100 Haike RoadShanghai 201210China

Hollow nanostructures are extremely attractive in energy storage and show broad application *** the preparation method is accompanied by a complicated *** this article,the CoZn-based hol-low nanoboxes with electrochemical synergy are prepared in a simple *** structure can effectively shorten the transmission distance of ions and electrons,and alleviate the volume expansion during the *** particular,bimetallic oxides are rich in oxygen vacancies,providing more active sites for electro-chemical *** addition,the stepwise oxidation-reduction reaction can also improve the volume change of the electrode *** to the kinetic analysis and density functional theory(DFT)calculation,it is confirmed that the synergistic effect of the bimetallic oxide can accelerate the reaction *** on these characteristics,the electrode exhibits stable cycle performance and long cycle life in alkali metal ion batteries,and can provide reversible capacities of 302.1(LIBs,2000 cycles),172.5(SIBs,10000 cycles)and 109.6(PIBs,5000 cycles)mA h g^(-1)at a current density of 1.0 A g^(-1),*** ad-dition,by assembling(LiCoO_(2)//CoZn-O_(2))and(Na_(3)V_(2)(PO_(4))_(3)//CoZn-O_(2))full-cells,the practical application value is *** sharing of this work introduces a simple way to synthesize hollow nanoboxes,and shows excellent electrochemical performance,which can also be expanded in other areas.

关键词： Hollow nanoboxes Bimetallic oxides DFT calculation Alkali metal ion batteries

Asymptotic Theory for Relative-Risk Models with Missing Time-Dependent Covariates

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Acta Mathematicae Applicatae Sinica 2018年第4期34卷 669-692页

作者： Zai-ying zhou Peng-cheng zhang ying YANG Department of Mathematical Sciences Tsinghua University Beijing 100084 China Center for Statistical Science of Tsinghua University Beijing 100084 China

Relative-risk models are often used to characterize the relationship between survival time and time-dependent covariates. When the covariates are observed, the estimation and asymptotic theory for parameters of interest are available; challenges remain when missingness occurs. A popular approach at hand is to jointly model survival data and longitudinal data. This seems efficient, in making use of more information, but the rigorous theoretical studies have long been ignored. For both additive risk models and relative-risk models, we consider the missing data nonignorable. Under general regularity conditions, we prove asymptotic normality for the nonparametric maximum likelihood estimators.

关键词： relative-risk model missing time-dependent covariate nonparametric maximum likelihood esti-mation asymptotic normality

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UML及其在图书管理系统中的应用

微处理机 2004年第5期25卷 52-54页

作者：周莹张宇华华南理工大学软件学院广州510641

UML是面向对象的标准化建模语言 ,它溶入了软件工程领域的新思想、新方法和新技术。本文介绍了UML的主要内容 ,并以图书管理系统为实例。

关键词：统一建模语言图书管理系统面向对象建模

ICSI周期显微取精术治疗13例AZF微缺失致无精子症的临床研究

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生殖医学杂志 2017年第8期26卷 737-742页

作者：季兴哲刘项周梁孙建华周寒鹰张洲师娟子西北妇女儿童医院生殖中心西安710003

目的探讨ICSI周期显微镜下睾丸切开取精术在AZF微缺失致无精子症患者中的临床应用价值。方法对2014年1月至2016年4月在我院生殖医学中心男科就诊并接受ICSI周期显微镜下睾丸切开取精术的13例AZF微缺失致无精子症患者的临床资料进行回顾... 详细信息

目的探讨ICSI周期显微镜下睾丸切开取精术在AZF微缺失致无精子症患者中的临床应用价值。方法对2014年1月至2016年4月在我院生殖医学中心男科就诊并接受ICSI周期显微镜下睾丸切开取精术的13例AZF微缺失致无精子症患者的临床资料进行回顾性研究,分析指标主要包括AZF微缺失类型、显微镜下睾丸切开取精术次数、单/双侧睾丸取精、精子获得率、精子可用率、正常受精率、可用胚胎率、优胚率及临床妊娠率。结果 ICSI周期显微镜下睾丸切开取精术的13例AZF微缺失致无精子症患者中,AZF微缺失类型分别为:AZFa区完全缺失1例,AZFc区完全缺失9例,AZFc区部分缺失1例,AZFd区部分缺失1例,AZFc区完全缺失伴AZFd区部分缺失1例。共行ICSI周期显微镜下睾丸切开取精术14例次,其中9例次单侧睾丸取精术,5例次双侧睾丸取精术;精子获得率78.57%,可用率72.73%。行ICSI助孕治疗者的正常受精率61.29%、可用胚胎率71.43%、优胚率40.48%、临床妊娠率57.14%。结论 ICSI周期显微镜下睾丸切开取精术可以使部分AZF微缺失致无精子症患者获得数量足够的精子行ICSI助孕治疗,并能获得良好的正常受精率、可用胚胎率、优胚率及临床妊娠率,是一种有效的治疗方法。

关键词：男性不育 AZF微缺失无精子症 ICSI

High-precision magnetic field measurement system based on a coherent population trapping magnetometer onboard the SATech-01 satellite

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Science China Technological Sciences 2025年

作者： Hongbo XUE Wei SONG Haoran ZHAO Yiteng zhang Shanzhi YE Jindong WANG Ran TAO Peng SANG Keli CHEN Xingzi BI Bingjun CHENG Bin zhou Yongliang XUE yingying TANG Liu LIU Jinsong LI Xiaocheng ZHU Baoquan LI Jinguo LIU Wen CHEN Xiaofeng zhang Yonghe zhang Lei LI State Key Laboratory of Space Weather National Space Science Center Chinese Academy of Sciences Key Laboratory of Solar Activity and Space Weather National Space Science Center Chinese Academy of Sciences Key Laboratory of Electronics and Information Technology for Space Systems National Space Science Center Chinese Academy of Sciences State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Innovation Academy for Microsatellites Chinese Academy of Sciences

On July 27, 2022, a high-precision system for measuring the magnetic field based on a coherent population trapping magnetometer（referred to as the CPT system） was launched onboard the Space Advanced Technology demonstration satellite（SATech-01） by a ZK-1A rocket. The payload comprises a scalar coherent population trapping magnetometer（CPTM）, triaxial anisotropic magnetoresistance magnetometer（AMRM）, and nano star tracker mounted on a non-magnetic telescopic tubular mast. This configuration enables synchronized measurement of scalar and vector geomagnetic fields, as well as the attitude,making the payload with its compact sensors suitable for applications on miniature satellite platforms. On November 7, 2022,the novel telescopic tubular mast was deployed in orbit, extending to a length of 5.28 m. The CPTM, an absolute scalar magnetometer with an omnidirectional sensor, is the first China-developed quantum/atomic magnetometer successfully operating in space. In orbit, the CPTM has sensitivity of ～10 pT/Hz1/2and can automatically operate under complex magnetic field variations. The difference between the scalar fields obtained using the CPTM and CHAOS model has a mean deviation of–3.73 n T and a standard deviation of 26.11 nT（1σ）, without on-orbit calibration or correction. The miniaturized AMRM has a sensitivity of ～0.3 n T/Hz1/2and maintains stable and reliable operation in orbit. The low-power and miniaturized nano star tracker has a measurement uncertainty of 14.23″（1σ） in orbit. The mission has realized the on-orbit technical verification of the integrated and synchronized detection of the vector magnetic field and attitude and fully validated the system's performance,automation level, and reliability.

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基于WOA优化FNN-PID的单晶硅加热炉炉温控制

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半导体技术 2025年第1期50卷 86-94页

作者：周佳凯张洪江南大学机械工程学院江苏无锡214000 江苏省食品先进制造装备技术重点实验室江苏无锡易214000

针对单晶硅加热炉炉温控制的大惯性、强耦合、长调节时间等问题,提出了基于鲸鱼优化算法(WOA)的优化模糊神经网络(FNN)比例-积分-微分(PID)算法。通过测试实验装置的温度推算出模型表达式,采用WOA进行选代寻优,得到合适的PID参数,利用FN... 详细信息

针对单晶硅加热炉炉温控制的大惯性、强耦合、长调节时间等问题,提出了基于鲸鱼优化算法(WOA)的优化模糊神经网络(FNN)比例-积分-微分(PID)算法。通过测试实验装置的温度推算出模型表达式,采用WOA进行选代寻优,得到合适的PID参数,利用FNN对PID参数进行实时调整,以实现动态解耦。通过仿真软件进行仿真验证,并在搭建的模型上分别进行阶跃响应实验和信号跟随实验。仿真结果表明,相较于传统的PID算法和FNN-PID算法,基于WOA的优化FNN-PID算法有效提升了系统的升温速度且无超调。对加热炉进行升温实验,结果表明温度超调量最高为0.9℃,恒温区温控精度保持在±0.3℃,表明该方法可有效提升系统升温速度和稳定性。

关键词：多温区温度控制鲸鱼优化算法(WOA) 模糊神经网络(FNN) 比例-积分-微分(PID) 单晶硅加热炉

An initial investigation of the non-isotropic feature of GNSS tropospheric delay

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Satellite Navigation 2024年第1期5卷 155-167页

作者： ying Xu Zaozao Yang Hongzhan zhou Fangzhao zhang College of Geodesy and Geomatics Shandong University of Science and Technology579 Qianwangang RoadQingdao266590ShandongChina

Tropospheric delay is a significant error source in Global Navigation Satellite Systems(GNSS)*** Path Delay(SPD)is commonly derived by multiplying Zenith Tropospheric Delay(ZTD)with a mapping ***,mapping functions,assuming atmospheric isotropy,restrict the accuracy of derived *** improve the accuracy,a horizontal gradient correction is introduced to account for azimuth-dependent SPD variations,treating the atmosphere as *** study uncovers that,amidst atmospheric dynamics and spatiotemporal changes in moisture content,the SPD deviates from that based on traditional isotropy or anisotropy *** innovatively introduces the concept that SPD exhibits non-isotropy with respect to azimuth *** validation involves assessing SPD accuracy using three mapping functions at five International GNSS Service(IGS)stations,referencing the SPD with the ray-tracing *** subsequently evaluates the SPD accuracy with horizontal gradient correction based on Vienna Mapping Function 3(VMF3)***,the non-isotropic of SPD is analyzed through the ray-tracing *** results indicate the smallest residual(1.1–82.7 mm)between the SPDs with VMF3 and those with the ***,introducing horizontal gradient correction yields no significant improvement of SPD *** potential decimeter-level differences in SPD due to non-isotropic tropospheric delay across azimuth angles,a precise grasp and summary of these variations is pivotal for accurate tropospheric delay *** finding provides vital support for future high-precision tropospheric delay modeling.

关键词： Tropospheric delay GNSS Non-isotropy Mapping function Ray-tracing Horizontal gradient ERA5