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Nano Research 2024年第8期17卷 7136-7143页

作者： Lijie Ma Xiaolin Wang Xiang Chen Jianbin Gao Yiwen Wang yuehai song Yaran Zhao Shizhe Gao Lin Li Jianchao Sun School of Environment and Material Engineering Yantai UniversityYantai 264005China College of Textile Science and Engineering(International Institute of Silk) Zhejiang Sci-Tech UniversityHangzhou 310018China BNU-HKUST Laboratory of Green Innovation Advanced Institute of Natural SciencesBeijing Normal UniversityZhuhai 519087China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China

Vanadium dioxide(VO_(2)) with the advantages of high theoretical capacity and tunnel structure has attracted considerable promising candidates for aqueous zinc-ion ***,the intrinsic low electronic conductivity of VO_(2) results in an unsatisfactory electrochemical ***,a flower-like VO_(2)/carbon nanotubes(CNTs)composite was obtained by a facile hydrothermal *** unique flower-like morphology shortens the ion transport length and facilitates electrolyte ***,the CNT conductive networks is in favor of fast electron transfer.A highly reversible zinc storage mechanism was revealed by ex-situ X-ray diffraction and X-ray photoelectron *** a result,the VO_(2)/CNTs cathode exhibits a high reversible capacity(410 mAh·g^(−1)),superior rate performance(305 mAh·g^(−1)at 5 A·g^(−1)),and excellent cycling stability(a reversible capacity of 221 mAh·g^(−1)was maintained even after 2000 cycles).This work provides a guide for the design of high-performance cathode materials for aqueous zinc metal batteries.

关键词： VO_(2)/carbon nanotubes morphology engineering zinc metal batteries cathode materials conductive networks

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化学还原法制备银粉及其在导电胶中的应用

电镀与精饰 2024年第9期46卷 102-107页

作者：崔振国秦松马丽杰张尚洲宋曰海烟台大学核装备与核工程学院山东烟台264000

研究化学还原法制备银粉过程中Ag~+浓度、还原液滴加方式、分散体系对银粉形貌的影响机理,获得一款适合用于导电胶制备的银粉。采用硝酸银为银源,分别以明胶、阿拉伯树胶以及聚乙烯吡咯烷酮(简称PVP)和明胶混合体系作为分散剂,研究不同... 详细信息

研究化学还原法制备银粉过程中Ag~+浓度、还原液滴加方式、分散体系对银粉形貌的影响机理,获得一款适合用于导电胶制备的银粉。采用硝酸银为银源,分别以明胶、阿拉伯树胶以及聚乙烯吡咯烷酮(简称PVP)和明胶混合体系作为分散剂,研究不同分散体系对银粉形貌及粒径等性能。结果表明银粉粒径随着溶液中Ag~+浓度升高呈现变大趋势;不同分散体系制备的银粉形貌差别较大,而粒径差别不大。以明胶为分散剂制备的银粉为规则的球状,以阿拉伯树胶为分散剂制备的银粉为规则的片簇状,以PVP和明胶混合体系作为分散剂制备的银粉形貌为球状与片状的混合。还原液加入方式对银粉粒径也有较大影响,以一次加入方式制备的银粉粒径分布范围较大。此外,银粉粒径随反应温度升高呈现逐渐变大的趋势。通过对比发现最适合用于导电胶制备的银粉为用以阿拉伯明胶单分散体系制备的球状银粉。化学还原法制备银粉过程中,溶液中Ag^(+)浓度、还原液滴加方式以及分散体系均对银粉形貌和粒径有不同程度的影响,用不同形貌的银粉制备导电胶时的体积电阻率有差别。

关键词：银粉形貌和粒径分散体系导电胶体积电阻率

Differentiation of endogenous neural stem cells in adult versus neonatal rats after brachial plexus root avulsion injury

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Neural Regeneration Research 2012年第23期7卷 1786-1790页

作者： Bingqi Wang Lei Chen Bin Liu Zhigang Liu Zhixin Zhang yuehai Pan Liangsong song Laijin Lu Department of Hand and Foot Surgery First Hospital of Jilin UniversityChangchun 130031Jilin ProvinceChina

An experimental model of brachial plexus root avulsion injury of cervical dorsal C5-6 was established in adult and neonatal ***-time PCR showed that the levels of brain-derived neurotrophic factor,nerve growth factor and neurotrophin-3 in adult rats increased rapidly 1 day after brachial plexus root avulsion injury,and then gradually decreased to normal levels by 21 *** neonatal rats,levels of the three neurotrophic factors were decreased on the first day after injury,and then gradually increased from the seventh day and remained at high levels for an extended period of *** observed that greater neural plasticity contributed to better functional recovery in neonatal rats after brachial plexus root avulsion injury compared with adult ***, immunohistochemical staining showed that the number of bromodeoxyuridine/nestin-positive cells increased significantly in the spinal cords of the adult rats compared with neonatal rats after brachial plexus root avulsion *** addition,the number of bromodeoxyuridine/glial fibrillary acidic protein-positive cells in adult rats was significantly higher than in neonatal rats 14 and 35 days after brachial plexus ***/β-tubulin-positive cells were not found in either adult or neonatal *** results indicate that neural stem cells differentiate mainly into astrocytes after brachial plexus root avulsion ***,the degree of neural stem cell differentiation in neonatal rats was lower than in adult rats.

关键词： neural stem cells neurotrophic factors brain-derived neurotrophic factor neuroregeneration brachial plexus nerve root avulsion injury neural regeneration

冷却时间对TMCP890钢焊接热影响区组织和性能影响

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材料研究学报 2015年第6期29卷 463-468页

作者：宋曰海张元杰张尚洲烟台大学环境与材料工程学院烟台264005

使用Gleeble-3800热模拟试验机研究了在800-500℃冷却时间(t8/5)对TMCP890钢焊接热影响区(HAZ)粗晶区组织转变规律和性能的影响,结果表明:冷却时间t8/5为6-20 s时粗晶区组织为板条马氏体,硬度值为334-328HV10;t8/5为20-60 s时粗晶区组... 详细信息

使用Gleeble-3800热模拟试验机研究了在800-500℃冷却时间(t8/5)对TMCP890钢焊接热影响区(HAZ)粗晶区组织转变规律和性能的影响,结果表明:冷却时间t8/5为6-20 s时粗晶区组织为板条马氏体,硬度值为334-328HV10;t8/5为20-60 s时粗晶区组织为板条马氏体+板条贝氏体,硬度值为328-305 HV10,Bs点在490-510℃;t8/5为150-2000 s时粗晶区组织为板条贝氏体+粒状贝氏体,Bs点在530-570℃,硬度值保持在270 HV10。稻垣道夫经验公式适用于TMCP890钢实际焊接过程中t8/5的计算,热输入E在10-20 k J/cm、T0在50-150℃变化时粗晶区的硬度值为318-335HV10,硬度值的波动幅度较小,性能稳定。

关键词：金属材料 Q890 低碳贝氏体钢热模拟组织硬度

The Persistence and Zonal Scale of Atmospheric Dipolar Modes

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Advances in Atmospheric Sciences 2024年第3期41卷 478-492页

作者： Jie song State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric Physics(IAP)Chinese Academy of SciencesBeijing 100029China

This study investigates the relationship between the persistence and the zonal scale of atmospheric dipolar modes(DMs). Results from the daily data of ERA5 and the long-term output of an idealized atmospheric model show that the atmospheric DMs with a broader(narrower) zonal scale dipolar structure possess a longer(shorter) persistence. A detailed vorticity budget analysis indicates that the persistence of a hemispheric-scale DM(1/1 DM) and a regional or sectoral DM(1/8 DM) in the model both largely rely on the persistence of the nonlinear eddy forcing. Linear terms can indirectly reduce the persistence of the anomalous nonlinear eddy forcing in a 1/8 DM by modifying the baroclinicity via the arousal of anomalous vertical motions. Therefore, the atmospheric DMs with a broader(narrower) zonal scale possess a longer(shorter) persistence because the effects of the linear terms are less(more) pronounced when the atmospheric DMs have better(worse) zonal symmetry. Further analyses show that the positive eddy feedback effect is weak or even absent in a 1/8DM and the high-frequency eddy forcing acts more like a concomitant phenomenon rather than a leading driving factor for a 1/8 DM. Thus, the hemispheric-scale DM and the regional or sectoral DMs are different, not only in their persistence but also in their dynamics.

关键词： NAM NAO eddy feedback persistence linear term

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振动挤密桩群体效应及其地基处理

太原理工大学学报 1999年第5期30卷 540-541,545页

作者：宋岳川宋岳海山西省勘察设计研究院

通过某工程地基处理检验，发现振动挤密碎石桩场区地基承载力群体效应远大于试桩区局部效应。在地基处理设计时，应充分考虑挤密桩群体效应，确定科学合理、技术经济的方案。

关键词：振动挤密桩群体效应地基处理设计价值

Identification of Linear Systems Using Binary Sensors with Random Thresholds

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Journal of Systems Science & Complexity 2024年第3期37卷 907-923页

作者： HUANG Zhiyong song Qijiang School of Mathematics Renmin University of ChinaBeijing 100872China School of Mathematics Sino-French InstituteRenmin University of ChinaBeijing 100872China

In this paper,the problem of identifying autoregressive-moving-average systems under random threshold binary-valued output measurements is *** the help of stochastic approximation algorithms with expanding truncations,the authors give the recursive estimates for the parameters of both the linear system and the binary *** reasonable conditions,all constructed estimates are proved to be convergent to the true values with probability one,and the convergence rates are also established.A simulation example is provided to justify the theoretical results.

关键词： α-mixing binary sensor quantized system stochastic approximation stochastic thresh-old strongly consistent system identification

The learning curve for transurethral enucleation with bipolar energy for benign prostate hyperplasia:a single-surgeon experience of 494 patients

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Asian Journal of Andrology 2024年第3期26卷 288-294页

作者： Byeongdo song Sang Hun song Seong Jin Jeong Department of Urology Seoul National University Bundang HospitalSeongnam 13620Korea Department of Urology Seoul National University College of MedicineSeoul 03080Korea

This study was performed to investigate the learning curve of transurethral enucleation with bipolar energy(TUEB)for benignprostatic *** study involved 494 consecutive patients who underwent TUEB for benign prostatic hyperplasia fromAugust 2018 to March 2022 by one surgeon(SJJ,Seoul National University Bundang Hospital,Seongnam,Korea).The patientswere followed up at 1 week,1 month,3 months,and 6 months *** evaluate the learning curve of TUEB,perioperativeparameters including the enucleation ratio(enucleated tissue weight/transitional zone volume),TUEB efficiency(enucleatedtissue weight/operation time),and enucleation efficiency(enucleated tissue weight/enucleation time)were *** and postoperative complications were also assessed,including the International Prostate Symptom Score(IPSS),IPSSquality-of-life(QoL)score,and uroflowmetry *** patients’median age was 72(interquartile range[IQR]:66–78)years,and the estimated prostate volume and transitional zone volume were 63.0(IQR:46.0–90.6)ml and 37.1(IQR:24.0–60.0)ml,*** enucleation ratio,TUEB efficiency,and enucleation efficiency were 0.60(IQR:0.46–0.54)g ml−1,0.33(IQR:0.22–0.46)g min−1,and 0.50(IQR:0.35–0.72)g min−1,respectively,plateauing after 70 *** functional outcomes,including total IPSS,IPSS QoL score,and uroflowmetry outcomes,significantly improved at 6 months after TUEB(all P<0.05),but without significant differences over the learning ***-five(13.2%)patients developed complications after TUEB,21.5%of whom experienced major complications(Clavien–Dindo grade≥3).The rate of major complications declined as the number ofTUEB cases increased(P=0.013).Our results suggest that the efficiency of TUEB stabilized within 70 procedures.

关键词： benign prostate hyperplasia learning curve perioperative efficiency prostate transurethral enucleation with bipolar energy

A Novel Three-stage Tectonic Model for Mississippi Valleytype Zn-Pb Deposits in Orogenic Fold-and-Thrust Belts

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Acta Geologica Sinica(English Edition) 2024年第4期98卷 843-849页

作者： song Yucai SinoProbe Laboratory Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China

Mississippi Valley-type(MVT) Zn-Pb deposits predominantly form within both orogenic forelands and fold-andthrust belts, yet the mineralization process within the latter tectonic setting remains inadequately understood. This study, through a comprehensive review of MVT deposits across global fold-and-thrust belts, introduces a novel model elucidating the mineralization process in the context of tectonic belt evolution. It is demonstrated that during the stage Ⅰ, regional compression is introduced by early stages of plate convergence, causing the folding and thrusting and creating structural or lithological traps such as evaporite diapirs and unconformity-related carbonate dissolution-collapse structures. Thereafter, in stage Ⅱ, hydrocarbons begin to migrate and accumulate within these traps, where reduced sulfur is generated through thermochemical or bacterial sulfate reduction concurrent with or preceding Zn-Pb mineralization. In the subsequent stage Ⅲ, as plate convergence persists, the regional stress transitions from compression to transpression or extension. Under these conditions, steeply-dipping extensional faults are generated, facilitating the ascent of metalliferous brines into early-formed structural or lithological traps. Precipitation of Zn and Pb sulfides occurs through the mixing of Zn-Pb-transporting fluids with pre-existing reduced sulfur or by interaction with hydrocarbons.

关键词： Mississippi Valley-type Zn-Pb deposits fold-and-thrust belts tectonic model structural or lithological traps extensional faults

Preparation and characterization of high-reactivity explosive-based nano-boron microspheres

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Particuology 2024年第10期93卷 125-136页

作者： Chen Dong Yi Wang Kanghui Jia Dan song Xiaolan song Chongwei An School of Materials Science and Engineering North University of ChinaTaiyuan030051China Jinxi Group Shanxi Jiangyang Chemical Co. Ltd.Taiyuan030051China China Ordnance Institute of Science and Technology Beijing100089China School of Environment and Safety Engineering North University of ChinaTaiyuan030051China

Boron nanoparticles,with their remarkably high gravimetric and volumetric calorific values,emerge as the most promising fuel in energetic ***,challenges such as susceptibility to oxidation,high ignition temperature,and low combustion efficiency have constrained their further *** this study,we fabricated high explosives based nano-boron microspheres with uniform size using the electrostatic spray method,in which the boron nanoparticles and high explosives(CL-20 or PETN)are closely bonded together by fluorinated polymer(F2602)and evenly *** results indicated that the microspheres exhibited high sphericity and showed an enhanced antioxidant *** addition of high-energy explosives not only reduced the thermal oxidation temperature of nano-boron powder within the microspheres but also significantly enhanced the pressurization ***,the microspheres with added high-energy explosives released more energy during the combustion *** to physically mixed samples,electrostatically sprayed microspheres with a uniform microstructure still exhibited higher ***,the design and synthesis of microspheres with controllable structures using the electrostatic spray method show promising application prospects.

关键词： Nano-boron CL-20 PETN Electrospraying Ignition and combustion