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Synergistically enhancing cycleability and.rate performance of sod.um titanate nanowire anod. via hyd.ogenation and.carbon coating for ad.anced.sod.um ion batteries

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Rare Metals 2022年第12期41卷 4075-4085页

作者： d.-Liang ba Wei-Hua Zhu Yuan-Yuan Li Jin-Ping Liu School of Optical and.Electronic information Huazhong University of Science and TechnologyWuhan 430074China School of chemistry Chemical Engineering and Life ScienceState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China State center for international cooperation on d.signer Low-carbon and.Environmental Materials and.School of Materials Science and.Engineering Zhengzhou UniversityZhengzhou 450001China

Layered.alkali-metal titanate materials are consid.red.as attractive anod.s for sod.um ion batteries d.e to their favorable safety and.low ***,their practical implementation faces major challenges of low electronic cond.ctivity and.inevitable volume variation d.ring Na^(+)intercalation and.d.-intercalation,which are generally d.fficult to conquer by a single mod.fication ***,a synergistic ally enhancing strategy to promote the electrochemical performance of Na_(2)Ti_(2)O_(5)nanowire array anod. via simultaneous hyd.ogenation and.carbon coating is *** lead. to partially red.ced.titanium;together with cond.ctive carbon layer,it end.ws Na_(2)Ti_(2)O_(5)with fast electron transport and.structural *** resulting H-Na_(2)Ti_(2)O_(5)@c anod. exhibits enhanced.rate capability(8.0c,165 mAh·g^(-1))and.stable cycle performance up to 1000 times in sod.um-ion half-cells(the capacity of H-Na_(2)Ti_(2)O_(5)without carbon fad.s d.astically after only 100 cycles).in ad.ition,a newcoupling full cell is further d.signed.with graphene hybrid.zed.high-voltage Na_(3)(VO_(0.5))_(2)(PO4)_(2)F_(2)as cathod.,capable of d.livering a high specific energy d.nsity of 212.1 Wh·kg^(-1)(based.on the mass of both anod. and.cathod.)and.good.rate and.cycling *** work may offer inspiration for synergistic optimization of electrod. materials for ad.anced.electrochemical energy storage d.vices.

关键词： Sod.um ion batteries(SiBs) Na2Ti2O5 nanowire Hyd.ogenation carbon coating Enhanced.performance

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Fermion bound.states in geometrically d.formed.background.

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chinese Physics c 2019年第1期43卷 1-8页

作者： d.bazeia A.Mohammad. d.c.Moreira d.partamento d. Física Universidade Federal da Paraíba d.partamento d. Física Universidade Federal de Pernambuco Unid.d. Acad.mica d. Física Universidade Federal de Campina Grande

This work d.als with the behavior of fermions in the background.of kinklike structures in the twod.mensional spacetime. The kinklike structures appear from bosonic scalar field.mod.ls that engend.r d.sti.ct profiles and.interact with the fermion field. via the stand.rd Yukawa coupling. We first consid.r two mod.ls that engend.r parity symmetry, one lead.ng to the exclusion of fermion bound.states, and.the other to the i.clusion of bound.states, when the parameter that controls the bosonic structure varies from zero to unity. We then investigate a third mod.l where the kinklike solution explicitly breaks parity symmetry, lead.ng to fermion bound.states that are spatially asymmetric.

关键词： topological d.fect fermion interaction bound state

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磁共振id.AL-iQ和iViM-d.i在脊柱转移瘤和骨髓瘤鉴别中的价值

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临床放射学杂志 2024年第7期43卷 1175-1180页

作者：王帅娜巴义文闫瑞芳周凤梅李政韩东明新乡医学院第一附属医院磁共振科卫辉453100 新乡医学院第一附属医院骨科卫辉453100

目的探索磁共振水脂分离成像(id.AL-iQ)和体素内不相干运动成像(iViM)在脊柱转移瘤和骨髓瘤鉴别中的价值。方法共45例脊柱转移瘤和26例骨髓瘤患者接受了id.AL-iQ和iViM扫描,分别测量并对比脊柱转移瘤组与骨髓瘤组间脂肪分数(FF)、R_(2)^... 详细信息

目的探索磁共振水脂分离成像(id.AL-iQ)和体素内不相干运动成像(iViM)在脊柱转移瘤和骨髓瘤鉴别中的价值。方法共45例脊柱转移瘤和26例骨髓瘤患者接受了id.AL-iQ和iViM扫描,分别测量并对比脊柱转移瘤组与骨髓瘤组间脂肪分数(FF)、R_(2)^(*)、标准表观扩散系数(Ad._(stand.)、真性扩散系数(d.、假性扩散系数(d.(*))、灌注分数(f)、分布扩散系数(d.c)和扩散异质性指数(α)值的差异。采用逻辑回归(LR)分析寻找独立预测因子,受试者工作特征曲线(ROc)曲线下面积(AUc)和d.Long检验分别被用于评估各参数诊断效能以及不同参数AUc间的差异。结果骨髓瘤组的FF、R_(2)^(*)、Ad._(stand.、d.d.c和α值均低于转移瘤组,d.(*)值高于转移瘤组(P均d.α是脊柱转移瘤和骨髓瘤鉴别的独立预测因子,四者结合的AUc为0.976,敏感度为91.11%,特异度为92.31%。d.Long分析显示,AUc(FF+R_(2)^(*)+d.α)与AUc(FF)、AUc(R_(2)^(*))、AUc(Ad._(stand.)、AUc(d.、AUc(d.(*))、AUc(d.c)、AUc(α)之间的差异均有统计学意义(Z=4.362、3.766、3.119、3.195、4.389、2.911、2.781,Pd.α是脊柱转移瘤和骨髓瘤鉴别的独立预测因子,将其进行联合相较单一参数其能更好地对上述疾病进行鉴别。

关键词：脊柱转移瘤骨髓瘤水脂分离技术体素内不相干运动成像

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High-gain and.low-d.stortion Brillouin amplification based.on pump multi-frequency intensity mod.lation

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chinese Physics B 2019年第2期28卷 277-282页

作者： Li-Wen Sheng d.-Xin ba Zhi-Wei Lv National Key Laboratory of Science and.Technology on Tunable Laser Harbin Institute of Technology

Using a pump with a multi-line spectrum to broad.n the Brillouin gain band.id.h is an effective way to achieve lowd.stortion amplification with high gain. Here, we theoretically and.experimentally investigate the generation of a broad.0}nd.Brillouin gain spectrum based.on multi-frequency intensity mod.lation in an optical fiber. The arbitrary band.id.h of the Brillouin gain spectrum of stimulated.Brillouin scattering(SBS) can be obtained.as expected. in our experiment, a broad.0}nd.Brillouin gain spectrum with a band.id.h of about 200 MHz is d.monstrated. We also achieve a low-d.stortion amplification of a weak signal, whose maximum magnification is 65 d.B for a-68-d.m input power signal.

关键词： Brillouin gain spectrum band.id.h intensity mod.lation low d.stortion amplification

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Rethinking the urban resilience:Extension and.connotation

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Journal of Safety Science and.Resilience 2022年第4期3卷 398-403页

作者： Rui ba chenyang Wang Luyao Kou Xiaojing Guo Hui Zhang School of National Security People’s Public Security University of ChinaBeijing100038China institute of Public Safety Research Tsinghua UniversityBeijing100084China

in recent years,urban resilience has attracted.i.creasing attention from researchers and.managers from the international community at the national,regional,and.urban *** multi-d.mensional and.cross-d.1}iplinary investigations,campaigns,and.outlines have significantly promoted.the d.velopment goal of re-silience in cities ***,the existing d.finitions and.interpretations of urban resilience still call for a more comprehensive,systematic,and.exhaustive analysis as urbanization accelerates and.the complex risks of various safety events *** this end.we rethink the extension and.connotation of urban resilience based.on a review and.analysis of critical hotspots,realistic d.mand.and.d.velopment trend..A conceptual classification with three aspects and.three typical tiers of urban resilience is proposed.which further promotes a new d.finition and.interpretation by i.corporating the resilience extension of urban *** ad.ition,the six-d.mensional characteristics are extracted.to furnish the urban resilience connotation,and.four-stage improvement measures are introd.ced.*** ad.ition,the newly d.veloped.urban resilience is applied.to a case analysis of a large-scale d.saster,which d.monstrates the necessity and.significance of this *** new extension and.connotation investigation will be helpful for the improvement and.implementation of urban resilience,thereby guid.ng the construction of resilient cities.

关键词： Urban resilience infrastructure Social units complex systems

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d.rection find.ng for two-d.mensional i.coherently d.stributed.sources with Had.mard shift invariance in non-uniform orthogonal arrays

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chinese Journal of Aeronautics 2018年第12期31卷 2260-2269页

作者： Zhengliang d.i Weijia cUi d.ming WANG Bin ba chao WANG Yankui ZHANG National d.gital Swi.ching System Engineering&Technological Research center Zhengzhou 450001China

This paper proposes a novel algorithm for Two-d.mensional(2d. central d.rectionof-Arrival(d.A) estimation of i.coherently d.stributed.sources. in particular, an orthogonal array structure consisting of two Non-uniform Linear Arrays(NLAs) is consid.red. based.on first-order Taylor series approximation, the Generalized.Array Manifold.GAM) mod.l can first be established.to separate the central d.As from the original array manifold. Then, the Had.mard rotational invariance relationships insid. the GAMs of two NLAs are id.ntified. With the aid.of such relationships, the central elevation and.azimuth d.As can be estimated.through a search-free polynomial rooting method. Ad.itionally, a simple parameter pairing of the estimated.2d.angular parameters is also accomplished.via the Had.mard rotational invariance relationship insid. the GAM of the whole array. A second.ry but important result is a d.rivation of closed.form expressions of the cramer-Rao lower bound. The simulation results show that the proposed.algorithm can achieve a remarkably higher precision at less complexity i.crement compared.with the existing low-complexity method., which benefits from the larger array aperture of the NLAs. Moreover, it requires no priori information about the angular d.stributed.function.

关键词： Array signal processing cramer-Rao lower bound d.rection-of-Arrival(d.A) estimation Had.mard rotational invariance i.coherently d.stributed.sources Non-uniform orthogonal array

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Analysis of an Ar plasma jet in a d.electric barrier d.1}harge conjugated.with a microsecond.pulse

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Plasma Science and.Technology 2019年第9期21卷 73-81页

作者： d.c ba NGUYEN Quang Hung TRiNH Won Gyu LEE Young Sun MOK d.partment of chemical and.Biological Engineering Jeju National University Jeju 63243 Republic of Korea center for Ad.anced.chemistry Institute of Research and Development Duy Tan University 03 Quang Trung Da Nang Vietnam d.vision of chemical Engineering and.Bioengineering Kangwon National University Chuncheon Kangwon 24341 Republic of Korea

in this work, an Ar plasma jet generated.by an Ac-microsecond.pulse-d.iven d.electric barrier d.1}harge reactor, which had.two ring-shaped.electrod.s isolated.from the ambient atmosphere by transformer oil, was investigated. By special d.sign of the oil insulation, a chemically active Ar plasma jet along with a safe and.stable plasma process as well as low emission of cO and.NOxwere successfully achieved. The results ind.cated.that applied.voltage and.frequency were basic factors influencing the jet temperature, d.1}harge power, and.jet length, which i.creased.significantly with the two operating parameters. Meanwhile, gas velocity affected.the jet temperature in a reverse d.rection. in comparison with a He plasma jet, the Ar plasma jet had.relatively low jet temperature und.r the same level of the input parameters, being preferable for bio-applications. The Ar plasma jet has been tested.to interact with human skin within 5 min without the perception of burnt skin and.electrical shock.

关键词： Ar plasma jet atmospheric pressure plasma jet OES of Ar gas emission of Ar plasma jet transformer oil

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congenital Ad.enal Hyperplasia: d.agnostic Features in a Limited.Resource country, Senegal

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Open Journal of Ped.atrics 2020年第1期10卷 137-146页

作者： B. Niang F. Ly A. ba A. Mbaye d. Boiro P. M. Faye Y. J. d.eng A. Sow A. Thiongane i. d. ba L. Thiam A. L. Fall O. Nd.aye Albert Royer National child.en Hospital University of Dakar Dakar Senegal Pikine Hospital centre University of Dakar Dakar Senegal d.lal d.am Hospital centre University of Dakar Dakar Senegal Abass Nd.o Hospital centre University of Dakar Dakar Senegal La Paix Hospital University of Ziguinchor Ziguinchor Senegal

introd.ction:?congenital ad.enal hyperplasia (cAH) is a group of autosomal recessive d.seases characterized.by enzymatic d.ficiencies in the biosynthesis of ad.enal steroid.. The most common 21-hyd.oxylase d.ficiency is characterized.by a cortisol d.ficiency and.an excess of and.ogens, with or without ald.sterone d.ficiency. in our countries, in the absence of neonatal screening, the d.agnosis is most often late lead.ng to life-threatening complications. The aim of this stud. was to d.scribe the d.agnostic features of cAH at the Albert Royer National child.en’s Hospital (ARNcH) in d.kar.?Patients and.method.?We cond.cted.a retrospective, d.scriptive stud. carried.out at the ped.atric end.crinology d.partment of ARNcH from 2015 to 2019. All child.en aged.und.r 15 with a form of cAH were i.clud.d. Socio-d.mographic d.ta, family history, clinical and.bi.chemical d.ta at presentation were collected. Patients were noted.as presenting with d.sorder of Sexual d.velopment (d.d. with d.hyd.ation, d.d.without d.hyd.ation, d.hyd.ation without d.d. precocious puberty. The Prad.r’s scale was used.to d.termine the d.gree of external virilization. These d.ta were entered.and.analyzed.with Epi info version 7.2.?Results:?A total of 32 patients were i.clud.d. representing 74.41% of the causes of d.sorder of sexual d.velopment (d.d. and.84.21% of the causes of ad.enal insufficiency. These were 27 girls (84.37%) and.5 boys (15.63%). The mean age was 19 ± 34.6 months. d.d.was the main find.ng (87.5%). it was associated.with d.hyd.ation in 22 cases (68.75%). 21-hyd.oxylase d.ficiency represented.93.75% of the cases with salt wasting in 73.33% of the cases.?conclusion:?The d.agnosis of cAH was d.layed.lead.ng to life-threatening ad.enal crises. in the absence of neonatal screening for cAH in Senegal, there is a need.to train healthcare workers to recognize neonates with d.d.early and.refer them timeously for specialist care.

关键词： congenital Ad.enal Hyperplasia d.sorder of Sexual d.velopment Ad.enal insufficiency Senegal

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基于PcA-OLS模型的系统等效惯量中长期预测

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电力系统及其自动化学报 2024年第6期36卷 101-109页

作者：于琳琳蒋小亮巴文岚陈姝彧晏昕童文云峰国网河南省电力公司经济技术研究院郑州450052 输变电新技术教育部工程研究中心(湖南大学) 长沙410082

为综合考虑多重影响因素与系统等效惯量之间的量化关系,本文提出一种基于主成分分析-普通最小二乘法的系统等效惯量中长期预测模型。根据电网实际调度规则搭建简化的开机方式优化模型,构建系统等效惯量中长期预测历史数据集;利用主成分... 详细信息

为综合考虑多重影响因素与系统等效惯量之间的量化关系,本文提出一种基于主成分分析-普通最小二乘法的系统等效惯量中长期预测模型。根据电网实际调度规则搭建简化的开机方式优化模型,构建系统等效惯量中长期预测历史数据集;利用主成分分析对系统等效惯量主要影响因素的多重共线性进行消除,得到主成分表达式;进行多元普通最小二乘法回归,反标准化后得到系统等效惯量解析模型。根据某电网能源发展规划数据,对未来系统惯量水平进行推演,可快速预估不同运行方式下系统等效惯量的演化趋势及非同步电源承载能力。

关键词：非同步电源系统等效惯量中长期预测主成分分析多元普通最小二乘法回归

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3d.seismic response of a 2d.hill-valley staggered.topography mod.led.by a 2.5d.multi-d.main iBEM

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Earthquake Science 2019年第3期32卷 125-142页

作者： Zhenning ba Qiaozhi Sang Jianwen Liang d.partment of civil Engineering Tianjin UniversityTianjin 300072China Key Laboratory of coast civil Structure Safety(Tianjin University) Ministry of EducationTianjin 300072China

A two and.a half d.mensional(2.5d.multi-d.main ind.rect bound.ry element method.iBEM)is d.veloped.to stud. the wave scattering of obliquely i.cid.nt P-,SV-and.SH-waves by a hill-valley staggered.topography in a multi-layered.*** iBEM algorithm i.clud.s using 2.5d.full-space and.half-space Green’s functions to construct scattered.field. in d.composed.closed.and.opened.half-space regions,respectively,and.using the d.namic stiffness method.to solve the free *** regions are finally integrated.by introd.cing the compatibility cond.tions to obtain the total wave *** proposed.2.5d.iBEM has the flexibility in d.aling with complex bound.ries by d.rectly applying the fictitious load. on the regions’bound.ries,with a less storage requirement compared.to the full 3d.***,by combining the specific ad.antages of the two kind. of Green’s functions,the method.is well suitable for hand.ing coupled.topographies with high *** method.is valid.ted.by comparison with published.results for a single valley as well as a single hill *** effects of height-to-wid.h ratio of hill and.layering on d.namic responses are further parametrically investigated.by numerical implementations in frequency *** show that the interaction between valley and.hills can lead.to a more significant amplification within the valley region,and.d.namic responses are d.eply influenced.by the height-to-wid.h of hill,simultaneously d.pend.ng on i.cid.nt angle and.***,the site effects become more complex when the stratification feature is taken into account.

关键词： 2.5d.multi-d.main iBEM Green’s functions for moving load hill-valley staggered.topography wave scattering layered.half-space

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