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注射用伏立康唑与2种注射液的配伍稳定性研究

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中国药房 2017年第17期28卷 2343-2346页

作者：崔晓红任进民刘萌亢泽坤贡莹北京医院临床试验研究中心北京100730 河北医科大学第二医院药学部石家庄050000 河北医科大学药学院石家庄050000

目的:考察注射用伏立康唑与果糖注射液、转化糖注射液的配伍稳定性。方法:参考药品说明书,取注射用伏立康唑200mg经注射用水溶解并定容至20 m L后,分别与果糖注射液250 m L、转化糖注射液250 m L配伍。在室温条件下,分别于配伍后0、1、2... 详细信息

目的:考察注射用伏立康唑与果糖注射液、转化糖注射液的配伍稳定性。方法:参考药品说明书,取注射用伏立康唑200mg经注射用水溶解并定容至20 m L后,分别与果糖注射液250 m L、转化糖注射液250 m L配伍。在室温条件下,分别于配伍后0、1、2、3、4、5 h观察各配伍液的外观,测定其p H和不溶性微粒数,并采用高效液相色谱法测定伏立康唑的含量。结果:在上述条件下,各配伍液在5 h内外观和p H均无明显变化,粒径≥10μm和≥25μm的微粒数均符合2015年版《中国药典》标准;伏立康唑的相对百分含量呈下降趋势(95.28%~100%),但其变化均在±5%范围内(RSD<2%,n=6)。结论:注射用伏立康唑与果糖注射液、转化糖注射液配伍后,在室温条件下5 h内保持稳定。

关键词：配伍稳定性注射用伏立康唑果糖注射液转化糖注射液高效液相色谱法

A Multi-faceted View of the X-Ray Spectral Variability in Seyfert Galaxy Ark 120

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Research in Astronomy and Astrophysics 2025年第1期25卷 228-239页

作者： Lu-Xin ren Jun-Xian Wang Jia-Lai Kang CAS Key Laboratory for Research in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of China School of Astronomy and Space Science University of Science and Technology of China

Utilizing a range of techniques including multi-band light curves,softness ratio analysis,structure functions,rms spectra,cross-correlation functions,and ratios of spectra from different intervals,we present a comprehensive study of the complex X-ray spectral variability in Seyfert 1 galaxy Ark 120,through re-analyzing its six XMM-Newton observations taken between 2003 and *** find a clear“softer-when-brighter”trend in the 2–10 ke V power-law component over long timescales,with this trend being timescale dependent,as it is much weaker on shorter timescales,similar to that previously detected in NGC ***,a rare“harder-when-brighter”trend is observed during one exposure,indicating dynamic changes in the spectral variability behavior of the power-law *** exceptional exposure,with the spectral variability indeed marked by a power-law pivoting at an unusually low energy of～2 ke V,suggests intricate variations in the thermal Comptonization processes within the ***,when the data below 2 ke V are included,we identify that the soft excess component adds significant complexity to the spectral variability,such as evidenced by a transition from“harder-when-brighter”to“softer-when-brighter”during another single *** extra complexity arises because the variability of the soft excess sometimes follows and sometimes does not follow the changes in the power-law *** findings underscore the necessity of applying multiple analytic techniques to fully capture the multifaceted spectral variability of AGNs.

关键词： galaxies: active galaxies: Seyfert X-rays: galaxies

高效液相色谱-质谱法测定大鼠不同脑区的硫酸酯型神经甾体

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色谱 2004年第6期22卷 575-578页

作者：任进民侯艳宁白求恩国际和平医院

应用高效液相色谱质谱联用技术,以雌酮硫酸酯为内标,建立了大鼠不同脑区硫酸酯型神经甾体的测定方法。甾体分两步萃取,第一步用氯仿仲丁醇(体积比为1∶1)提取甾体硫酸酯,然后经固相萃取纯化。溶剂解使甾体硫酸酯形成游离型甾体,然后... 详细信息

应用高效液相色谱质谱联用技术,以雌酮硫酸酯为内标,建立了大鼠不同脑区硫酸酯型神经甾体的测定方法。甾体分两步萃取,第一步用氯仿仲丁醇(体积比为1∶1)提取甾体硫酸酯,然后经固相萃取纯化。溶剂解使甾体硫酸酯形成游离型甾体,然后用衍生化试剂进行衍生化,再用液相色谱质谱分离测定。初步研究发现,雄性SD大鼠不同脑区神经甾体孕烯醇酮硫酸酯和脱氢表雄酮硫酸酯的含量分别为(4 14±1 33)ng/g和(2 26±0 76)ng/g(垂体),(1 98±1 13)ng/g和(1 80±0 93)ng/g(下丘脑),(1 08±0 48)ng/g和(0 81±0 23)ng/g(额叶皮质),(0 72±0 19)ng/g和(0 77±0 12)ng/g(海马),(1 70±0 45)ng/g和(1 44±0 71)ng/g(杏仁核),(0 92±0 27)ng/g和(0 85±0 44)ng/g(纹状体),(3 62±1 77)ng/g和(3 17±2 11)ng/g(伏隔核)。每种神经甾体与内标的峰面积比和甾体浓度都有良好的线性关系,测定准确度较高。该方法可满足大鼠不同脑核团内结合型甾体的分离测定。

关键词：高效液相色谱-质谱孕烯醇酮硫酸酯脱氢表雄酮硫酸酯脑区大鼠

Statistical analysis on the validity of the cold plasma approximation for chorus waves based on Van Allen Probe observations and their effects on radiation belt electrons

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Earth and Planetary Physics 2025年第1期9卷 159-170页

作者： AoJun ren Jiang Yu Jing Wang ZuZheng Chen XiaoMan Liu Planetary Environmental and Astrobiological Research Laboratory(PEARL) School of Atmospheric SciencesSun Yat-sen UniversityZhuhai Guangdong 519000China

Theoretical analysis has demonstrated that the dispersion relation of chorus waves plays an essential role in the resonant interaction and energy transformation between the waves and magnetospheric *** quantitative analyses often simplified the chorus dispersion relation by using the cold plasma ***,the applicability of the cold plasma assumption is doubtful,especially during geomagnetic *** here present a systematic statistical analysis on the validity of the cold plasma dispersion relation of chorus waves based on observations from the Van Allen Probes over the period from 2012 to *** statistical results show that the observed magnetic field intensities deviate substantially from those calculated from the cold plasma dispersion relation and that they become more pronounced with an increase in geomagnetic activity or a decrease in background plasma *** region with large deviations is mainly concentrated in the nightside and expands in both the radial and azimuthal directions as the geomagnetic activity increases or the background plasma density *** addition,the bounce-averaged electron scattering rates are computed by using the observed and cold plasma dispersion relation of chorus *** with usage of the cold plasma dispersion relation,usage of the observed dispersion relation considerably lowers the minimum resonant energy of electrons and lowers the scattering rates of electrons above tens of kiloelectronvolts but enhances those ***,these differences are more pronounced with the enhancement of geomagnetic activity or the decrease in background plasma density.

关键词： chorus waves cold plasma approximation dispersion relations scattering rates

A Review on Thermal Management of Li-ion Battery:from Small-Scale Battery Module to Large-Scale Electrochemical Energy Storage Power Station

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Journal of Thermal Science 2025年第1期34卷 1-23页

作者： CHEN Zhifeng JIA Li YIN Liaofei DANG Chao ren Honglei ZHANG Zhiqiang Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale School of MechanicalElectronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China

Li-ion battery is an essential component and energy storage unit for the evolution of electric vehicles and energy storage technology in the ***,in order to cope with the temperature sensitivity of Li-ion battery and maintain Li-ion battery safe operation,it is of great necessary to adopt an appropriate battery thermal management system(BTMS).In this paper,the current main BTM strategies and research hotspots were discussed from two aspects:small-scale battery module and large-scale electrochemical energy storage power station(EESPS).The practical application situation,advantages and disadvantages,and the future development trend of each heat dissipation method(air,liquid,PCM,heat pipe,hybrid cooling)were described in *** them,the air cooling and liquid cooling were reviewed in-depth based on the engineering *** PCM,heat pipe and hybrid cooling were reviewed extensively based on the latest *** research provides a comprehensive understanding for the BTMS in all scales.

关键词： battery thermal management cooling methods small-scale battery module large-scale electrochemical energy storage power station

人血浆中氟康唑的LC-MS/MS法测定及药动学

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中国医药工业杂志 2010年第12期41卷 929-931页

作者：任进民孙倩张国旗赵曦刘焕龙河北医科大学第二医院河北石家庄050000 中奇制药技术有限公司河北石家庄050051

建立了LC-MS/MS法测定人血浆中的氟康唑(1)。采用C_(18)色谱柱,以甲磺酸酚妥拉明(2)为内标,2 mmol/L乙酸铵溶液(含0.05%甲酸)-甲醇(40∶60)为流动相,电喷雾离子化源,选择性正离子多反应监测,检测离子分别为m/z 307.2→238.2(1)和m/z 28... 详细信息

建立了LC-MS/MS法测定人血浆中的氟康唑(1)。采用C_(18)色谱柱,以甲磺酸酚妥拉明(2)为内标,2 mmol/L乙酸铵溶液(含0.05%甲酸)-甲醇(40∶60)为流动相,电喷雾离子化源,选择性正离子多反应监测,检测离子分别为m/z 307.2→238.2(1)和m/z 282.2→212.2(2)。1在0.03～10μg/ml浓度范围内线性关系良好,方法回收率大于94%,提取回收率大于90%,日内和日间RSD均小于5.4%。20名男性健康志愿者单剂量口服1片150 mg,主要药动学参数为c_(max)(3.26±0.54)μg/ml,t_(max)(1.42±0.65)h,t_(1/2)(29.75±4.89)h,AUC_(-120h)(131.4±23.4)μg·ml^1·h和AUC_(0→∞)(140.5±26.3)μg·ml^1·h。

关键词：氟康唑液相色谱-串联质谱测定药动学

Bearing Fault Diagnosis Based on the Markov Transition Field and SE-IShufflenetV2 Model

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Structural Durability & Health Monitoring 2025年第1期19卷 125-144页

作者： Chaozhi Cai Tiexin Xu Jianhua ren Yingfang Xue School of Mechanical and Equipment Engineering Hebei University of EngineeringHandan056038China

A bearing fault diagnosis method based on the Markov transitionﬁeld(MTF)and SEnet(SE)-IShufﬂenetV2 model is proposed in this paper due to the problems of complex working conditions,low fault diagnosis accuracy,and poor generalization of rolling ***,MTF is used to encode one-dimensional time series vibration sig-nals and convert them into time-dependent and unique two-dimensional feature ***,the generated two-dimensional dataset is fed into the SE-IShufﬂenetV2 model for training to achieve fault feature extraction and classiﬁ*** paper selects the bearing fault datasets from Case Western Reserve University and Paderborn University to experimentally verify the effectiveness and superiority of the proposed *** generalization performance of the proposed method is tested under the variable load condition and different signal-to-noise ratios(SNRs).The experimental results show that the average accuracy of the proposed method under different working conditions is 99.2%without adding *** accuracy under different working conditions from 0 to 1 HP is 100%.When the SNR is 0 dB,the average accuracy of the proposed method can still reach 98.7%under varying working ***,the bearing fault diagnosis method proposed in this paper is characterized by high accuracy,strong anti-noise ability,and ***,the proposed method can also overcome the inﬂuence of variable working conditions on diagnosis accuracy,providing method support for the accurate diagnosis of bearing faults under strong noise and variable working conditions.

关键词： Bearings Markov transitionﬁeld SE-IShufﬂenetV2

Deep reinforcement learning based integrated evasion and impact hierarchical intelligent policy of exo-atmospheric vehicles

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Chinese Journal of Aeronautics 2025年第1期38卷 409-426页

作者： Leliang ren Weilin GUO Yong XIAN Zhenyu LIU Daqiao ZHANG Shaopeng LI Xi’an Research Institute of High Technology Xi’an 710025China China Xi’an Satellite Control Center Xi’an710043China Department of Automation Tsinghua UniversityBeijing 100084China

Exo-atmospheric vehicles are constrained by limited maneuverability,which leads to the contradiction between evasive maneuver and precision *** address the problem of Integrated Evasion and Impact(IEI)decision under multi-constraint conditions,a hierarchical intelligent decision-making method based on Deep Reinforcement Learning(DRL)was ***,an intelligent decision-making framework of“DRL evasion decision”+“impact prediction guidance decision”was established:it takes the impact point deviation correction ability as the constraint and the maximum miss distance as the objective,and effectively solves the problem of poor decisionmaking effect caused by the large IEI decision ***,to solve the sparse reward problem faced by evasion decision-making,a hierarchical decision-making method consisting of maneuver timing decision and maneuver duration decision was proposed,and the corresponding Markov Decision Process(MDP)was designed.A detailed simulation experiment was designed to analyze the advantages and computational complexity of the proposed *** results show that the proposed model has good performance and low computational resource *** minimum miss distance is 21.3 m under the condition of guaranteeing the impact point accuracy,and the single decision-making time is 4.086 ms on an STM32F407 single-chip microcomputer,which has engineering application value.

关键词： Exo-atmospheric vehicle Integrated evasion and impact Deep reinforcement learning Hierarchical intelligent policy Single-chip microcomputer Miss distance

Total synthesis of(+)-taberdicatine B and(+)-tabernabovine B

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Chinese Chemical Letters 2025年第2期36卷 349-353页

作者： Tengfei Xuan Xinyu Zhang Wei Han Yidong Huang Weiwu ren Molecular Synthesis Center&Key Laboratory of Marine Drugs Chinese Ministry of EducationSchool of Medicine and PharmacyOcean University of China Laboratory for Marine Drugs and Bioproducts Laoshan Laboratory

The first total synthesis of(+)-taberdicatine B and(+)-tabernabovine B has been accomplished in 10steps with 26.9% overall yield and 15 steps with 7.3% overall yield, respectively. The prominent features of this efficient synthetic strategy include the following:(1)(+)-Taberdicatine B and(+)-tabernabovine B were accessed from common advanced intermediates by varying the substituents;(2) A one-pot asymmetric bromocyclization/hydrolysis was explored to assemble HPI skeleton;(3) Dieckmann condensation to form β-keto ester for the assembly of seven-membered ring;(4) An ester reduction/amide semireduction/cyclization sequence was applied to form the cage-like framework.

关键词： Asymmetric dearomatization Hexahydropyrrolo[2,3-b]indole Taberdicatine B Tabernabovine B Total synthesis