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Risk factors for biometry prediction error by Barrett Universal II intraocular lens formula in Chinese patients

International Journal of Ophthalmology(English edition) 2025年第1期18卷 74-78页

作者： Xu-Hao Chen Ying Hong Xiang-han ke Si-Jia Song Yu-Jie Cen Chun Zhang Beijing key Laboratory of Restoration of Damaged Ocular Nerve Department of OphthalmologyPeking University Third HospitalBeijing 100191China State key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhou 510060Guangdong ProvinceChina

AIM:To investigate the influence of postoperative intraocular lens(IOL)positions on the accuracy of cataract surgery and examine the predictive factors of postoperative biometry prediction errors using the Barrett Universal II(BUII)IOL formula for ***:The prospective study included patients who had undergone cataract surgery performed by a single surgeon from June 2020 to April *** collected data included the best-corrected visual acuity(BCVA),corneal curvature,preoperative and postoperative central anterior chamber depths(ACD),axial length(AXL),IOL power,and refractive *** formula was used to calculate the IOL *** mean absolute error(MAE)was calculated,and all the participants were divided into two groups *** t-tests were applied to compare the variables between *** regression analysis was used to analyze the influence of age,AXL,corneal curvature,and preoperative and postoperative ACD on ***:A total of 261 patients were *** 243(93.1%)and 18(6.9%)had postoperative MAE1 D,*** number of females was higher in patients with MAE>1 D(χ^(2)=3.833,P=0.039).The postoperative BCVA(logMAR)of patients with MAE>1 D was significantly worse(t=-2.448;P=0.025).After adjusting for gender in the logistic model,the risk of postoperative refractive errors was higher in patients with a shallow postoperative anterior chamber[odds ratio=0.346;95% confidence interval(CI):0.164,0.730,P=0.005].CONCLUSION:Risk factors for biometry prediction error after cataract surgery include the patient’s sex and postoperative *** with a shallow postoperative anterior chamber are prone to have refractive errors.

关键词： intraocular lens power calculation gender anterior chamber depth biometry prediction error

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黑龙江大豆根瘤菌及根际促共生菌株的筛选及应用

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生物技术通报 2025年第1期41卷 252-262页

作者：刘克寒杨升辉黄巧云崔文靖中化环境控股有限公司北京100071 济宁岚德生物科技有限公司济宁272000 华中农业大学农业微生物学国家重点实验室武汉430070 绿氮生物科技有限公司北京100094

【目的】黑龙江是我国大豆的主产区,有着丰富的大豆根瘤菌资源,针对该区域筛选优质抗逆大豆根瘤菌及根际促共生菌株对于大豆的提质增产至关重要。【方法】从黑龙江采集根瘤、根际土分离纯化大豆根瘤菌、根际菌,通过rpoB、16S rRNA基因... 详细信息

【目的】黑龙江是我国大豆的主产区,有着丰富的大豆根瘤菌资源,针对该区域筛选优质抗逆大豆根瘤菌及根际促共生菌株对于大豆的提质增产至关重要。【方法】从黑龙江采集根瘤、根际土分离纯化大豆根瘤菌、根际菌,通过rpoB、16S rRNA基因测序进行种属鉴定。在试管培养条件下进行根瘤菌菌株对盐胁迫(1.2%NaCl)、干旱胁迫(15%PEG6000)的耐受性评价。胁迫耐受根瘤菌菌株接种到黑河43,筛选高效共生菌株。代表性根瘤菌菌株及其根际促共生菌株混合菌接种到黑河43,获得高效共生根瘤菌及促共生显著的菌株。【结果】(1)分离获得大豆根瘤菌136株,其中129株慢生型根瘤菌(分属于Bradyrhizobium elkanii、***、B. diazoefficiens、B. yuanmingense、B. liaoningense);7株快生型根瘤菌(分属于Sinorhizobium fredii、Sinorhizobium sp.)。(2)分离获得拮抗大豆根腐病病原菌(镰刀菌)的菌株6株(B1-B6,分属于Bacillus velezensis、B. subtilis、B. licheniformis、***、B. megaterium),其中有4株(B1、B2、B4、B5)具有产IAA的能力。(3)获得耐盐或耐旱代表性大豆根瘤菌28株,其中有两株大豆根瘤菌B. japonicum GN1、B. diazoefficiens GN10对盐胁迫、干旱胁迫均具有较好抗性,并且通过共生表型的筛选确定GN10是代表菌株中最为高效的大豆根瘤菌。(4)混合接种大豆表型结果表明,B. velezensis B4相比于其余5株芽胞杆菌可以显著提升*** GN10的共生表现。【结论】成功获得耐盐、耐旱且共生效率高的慢生大豆根瘤菌1株,同时获得对共生表现促进效果显著的贝莱斯芽胞杆菌1株,为高效复合根瘤菌菌剂的开发及应用提供有力支撑。

关键词：大豆根瘤菌胁迫耐受高效共生根际促生菌共接种

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宏量制备导电属性可控的高质量单壁碳纳米管

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物理学进展 2025年第1期45卷 47-54页

作者：杨可汉王超袁国文高力波南京大学物理学院固体微结构物理国家重点实验室南京 210093

单壁碳纳米管(SWCNTs)由于其优异的电导、机械和热学性能,具备广泛应用前景.目前,浮动催化剂化学气相沉积法(FCCVD)是大规模制备SWCNTs的常用方法.然而,利用该方法获得的 SWCNTs 的纯度和质量不足,并且样品的导电属性可控性差,金属单壁... 详细信息

单壁碳纳米管(SWCNTs)由于其优异的电导、机械和热学性能,具备广泛应用前景.目前,浮动催化剂化学气相沉积法(FCCVD)是大规模制备SWCNTs的常用方法.然而,利用该方法获得的 SWCNTs 的纯度和质量不足,并且样品的导电属性可控性差,金属单壁碳纳米管(m-SWCNTs)与半导体单壁碳纳米管(s-SWCNTs)并存,限制了其进一步应用.为了连续化生长高质量、高纯度,具备单一导电属性的SWCNTs,本论文提出了一种通过放置管塞将SWCNTs滞留在高温区以实现持续生长,并加入电场实现单一导电属性的SWCNTs选择性生长的方法,最终得到高纯度的半导体富集的 SWCNTs.我们通过光学、热重分析和扫描电子显微镜对 SWCNTs进行系统的测量与分析,研究SWCNTs纯度与s-SWCNTs的占比.该工作为大规模制备高质量高纯度的SWCNTs提供了方案,有望加速其工业化应用.

关键词：单壁碳纳米管浮动催化剂化学气相沉积法可控制备半导体性

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Magnetometer-only linear attitude estimation for bias momentum pico-satellite

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第6期11卷 455-464页

作者： ke han Hao WANG Zhong-he JIN Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China

Satellite attitude information is essential for pico-satellite applications requiring light-weight,low-power,and fast-computation *** objective of this study is to provide a magnetometer-only attitude estimation method for a low-altitude Earth orbit,bias momentum *** on two assumptions,the spacecraft spherical symmetry and damping of body rates,a linear kinematics model of a bias momentum satellite's pitch axis is derived,and the linear estimation algorithm is *** algorithm combines the linear Kalman filter(KF) with the classic three-axis attitude determination method(TRIAD).KF is used to estimate satellite's pitch axis orientation,while TRIAD is used to obtain information concerning the satellite's three-axis *** tests confirmed that the algorithm is suited to the time-varying model errors resulting from both *** estimate result keeps tracking satellite attitude motion during all damping,stable,and free rotating control *** with nonlinear algorithms,such as extended Kalman filer(EKF) and square root unscented Kalman filer(SRUKF),the algorithm presented here has an almost equal performance in terms of convergence time and estimation accuracy,while the consumption of computing resources is much lower.

关键词： Pico-satellite Attitude estimation Bias momentum Magnetometer Kalman filter(KF)

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Enhanced search sensitivity to the double beta decay of ^(136)Xe to excited states with topological signatures

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Science China(Physics,Mechanics & Astronomy) 2021年第6期64卷 41-50页

作者： Chen Xie Kaixiang Ni ke han Shaobo Wang Institute of Nuclear and Paricle Physics(INPAC) Shanghai Laboratory for Particle Physics and CosmologyKey Laboratory for Partic le Astrophysics and Cosmology(MOE)School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China ParisTech Elite Institute of Technology Shanghai Jiao Tong UniversiryShanghai 200240China

The double beta decay of ^(136)Xe to excited states of 136Ba(DBD-ES)has not yet been discovered *** experimental signature of such decays,one or two gamma rays following the beta signals,can be identified more effectively in a gaseous detector with the help of topological *** have investigated key parameters of particle trajectories of DBD-ES with Monte Carlo simulation data of the proposed PandaX-III detector as an *** background rates can be reduced by about one order of magnitude while keeping more than half of signals with topological *** estimated half-life sensitivity of DBD-ES can be improved by 1.8 times to 4.1×10^(23) year(90%C.L.).Similarly,the half-life sensitivity of neutrinoless double beta decay of ^(136)Xe to excited states of 136Ba can be improved by a factor of 4.8 with topological signatures.

关键词： neutrino double beta decay topological signatures background suppression

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Photoinduced superlubricity on TiO_(2) surfaces

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Friction 2024年第3期12卷 428-438页

作者： ke han Liran MA Yu TIAN Jianbin LUO State key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China Received:16 September 2022/Revised:28 October 2022/Accepted:27 December 2022The author(s)2022.

Superlubricity control is of great interest in both industry and scientific research,and several methods have been proposed to achieve this *** this work,ultraviolet(UV)light was introduced into titanium dioxide(TiO_(2))and silicon nitride(Si_(3)N_(4))tribosystems to accomplish photoinduced *** friction coefficients(COFs)between Si_(3)N_(4) balls and TiO_(2) plates in the mixtures of sulfuric acid(H^(2)SO_(4))solution and glycerol solution were obviously reduced,and the system entered the superlubricity region(COFhan that with UV *** formation of silica(SiO_(2))layers on the surfaces of Si_(3)N_(4) balls and the elastohydrodynamic effects were determined to be fundamental to the low friction in this experiment,and the enhancement of the combination between the TiO_(2) surface and the hydroxy group of glycerol by UV illumination was the key to the photoinduced superlubricity in this *** findings showed one method for achieving superlubricity by introducing a light field that could be further applied to special working conditions.

关键词： light control friction superlubricity glycerol titanium dioxide(TiO_(2))

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Direct Dynamics Study on CH_2O + CH_3~·→ CHO + CH_4 Reaction

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Chinese Chemical Letters 2006年第4期17卷 565-568页

作者： Yan QI ke Li han State key Laboratory of Molecular Reaction Dynamic Dalian Institute of Chemical Physics Chinese Academy of Science Dalian 116023

It is still a formidable challenge to study CH2O ＋ CH3·→ CHO ＋ CH4 reaction in the gas phase by traditional dynamics, because of the large number of freedom degrees for the system. In this paper, direct dynamics, in which trajectories were run directly on the DFT potential energy surface, have been applied to the reaction, which gave a direct look in the reaction processes. Two sets of trajectories at different initial orientations of reactants and temperature have been simulated. And the detailed reaction mechanisms have been described.

关键词： Direct dynamics DFT reaction mechanism.

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Magnetometer Compensation Scheme and Experimental Results on ZDPS-1A Pico-satellite

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Chinese Journal of Aeronautics 2012年第3期25卷 430-436页

作者： han ke WANG Hao XIANG Tian JIN Zhonghe Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027China

In a pico-satellite with small volume, measurements from on-board three-axis magnetometer （TAM） are not accurate, as it can be easily disturbed by other electronic systems. To improve its accuracy, a scheme of compensation methods is introduced in this article. The scheme is based on an improved meast, rement model of pico-satellite TAM, and it mainly consists of three steps. First, in satellite design stage, several techniques are recommended to simplify the afterwards compensations. Then after satellite assembly, TAM ground tests and pre-launch calibration with least-square batch filter are introduced to improve magnetometer performance. At the end, a post-launch calibration with unscented Kalman filter （UKF） is implemented with in-orbit data. The compensation scheme is used in the development of Chinese pico-satellite ZDPS-1A made by Zhejiang University. Results show that with the introduced compensation scheme, the maximum error of ZDPS-1A TAM can be reduced from 80 mG to 6 naG （1 G=10^-4T）.

关键词： pico-satellite magnetometers calibration: least-square filter Kalman filter

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Effects of heat treatment and Re-content on the TCP-phase in two Ni-Mo-Cr-Re superalloys

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Acta Metallurgica Sinica(English Letters) 2009年第5期22卷 365-372页

作者： Pingli MAO Yan XIN ke han Weiguo JIANG School of Materials Science and Engineering Shenyang Univers-ity of Technology Shenyang 110023 China National High Magnetic Field Laboratory Florida State University Tallahassee Florida USA Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The volume fraction and morphology of the TCP-phase formed in two kinds of Ni- Mo-Cr-Re superalloys under different heat treatment conditions were investigated in this paper. In Re-5% alloy, with increasing of the heat treatment temperature and prolonging the holding time, the volume fraction of TCP-phase decreased and the TCP-phase size increased. At relatively lower temperature, the TCP-phase prefers to present in the dendrite cores. In Re-10% alloy, the volume fraction and size have the same change tendency as that of in Re-5% alloy, but the morphology will change from needle-like and block-like to sphere when the temperature increases. The TCP-phases formed in these two Ni-Mo-Cr-Re alloys are σ and P phase.

关键词： Heat treatment TCP-phase Superalloy

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Pico-satellite Autonomous Navigation with Magnetometer and Sun Sensor Data

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Chinese Journal of Aeronautics 2011年第1期24卷 46-54页

作者： han ke WANG Hao TU Binjie JIN Zhonghe Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China

This article presents a near-Earth satellite orbit estimation method for pico-satellite applications with light-weight and low-power requirements. The method provides orbit information autonomously from magnetometer and sun sensor, with an extended Kalman filter （EKF）. Real-time position/velocity parameters are estimated with attitude independently from two quantities： the measured magnitude of the Earth’s magnetic field, and the measured dot product of the magnetic field vector and the sun vector. To guarantee the filter’s effectiveness, it is recommended that the sun sensor should at least have the same level of accuracy as magnetometer. Furthermore, to reduce filter’s computation expense, simplification methods in EKF’s Jacobian calculations are introduced and testified, and a polynomial model for fast magnetic field calculation is developed. With these methods, 50% of the computation expense in dynamic model propagation and 80% of the computation burden in measurement model calculation can be reduced. Tested with simulation data and compared with original magnetometer-only methods, filter achieves faster convergence and higher accuracy by 75% and 30% respectively, and the suggested simplification methods are proved to be harmless to filter’s estimation performance.

关键词： pico-satellite autonomous navigation orbit estimation magnetometer Kalman filter

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