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Enhancing dielectric response in relaxor by.engineering dy.amics of polar nanoregions

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Enhancing dielectric response in relaxor by engineering dyna...

Nature of Surface Lay.r and Electrochemical Behavior of NaOH Hy.rothermally.Treated NiTi Alloy

第十二届全国物理力学学术会议

作者： y.Ni y.-p.shi A.-K.Soh Key.Laboratory.of Mechanical Behavior and Design of Materials University of Science and Technology of China China Department of Mechanical Engineering The University of Hong Kong Department of Mechanical Engineering The University of Hong Kong

The relaxor ferroelectrics with known giant piezoelectric and electrocaloric effects make attractive in various technical *** effects originate from its abnormal temperatureand frequency.dependent dielectric *** experiments indicate that the unusual dielectric response mainly.results from reorientation dy.amics of interacting polar nanoregions (pNR).We adopted a master equation approach to investigate how the pNR dy.amics influences the static and dy.amic dielectric *** pNR reorientation dy.amics is thermally.activated with a broad distribution of activation *** activation barrier takes into account the contribution of the temperature,applied electric field and the pNR *** Vogel-Fulcher temperature dependency.of the pNR-reorientation frequency.is found to emerge *** calculated temperature and frequency.dependence of the dielectric response is in striking agreement with recent experimental data.

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Journal of Materials Science & Technology 2004年第2期20卷 185-188页

作者： p.shi F.T.Cheng H.C.Man DepartmentofAppliedphy.ics TheHongKongPolytechnicUniversityHongKongChina DepartmentofIndustrialandSy.temsEngineering TheHongKongPolytechnicUniversityHongKongChina

NiTi samples were hy.rothermally.treated in NaOH at 200℃ with different soaking times. The morphology.of the surface lay.r formed was studied by.scanning electron microscopy.(SEM). The composition of the lay.r and the major phases present were determined by.energy.dispersive spectroscopy.(EDS) and X-ray.diffractometry.(XRD), respectively. In contrast to the results reported by.some authors, the surface lay.r was essentially.Ni(OH)2 instead of being TiO2. The electrochemical behavior of the samples was studied by.electrochemical impedance spectroscopy.(EIS) in 3.5% NaCl solution at 23℃, and analy.ed using a simplified Randle circuit consisting of a resistance R and a capacitance C in parallel. After hy.rothermal treatment, R was increased by.a factor ranging from 1.5 to 5.0 times, depending on the treatment time. The value of R of all the samples became steady.within a period of less than 15 h. Results of the present study.indicate that alkaline treatment leads to the growth of an insulating lay.r on NiTi, but the method is not suitable for surface modification of NiTi implants due to the enhanced Ni content in the surface lay.r.

关键词： Hy.rothermal treatment NiTi NaOH Resistance Electrochemical impedance spectroscopy

Complete response of gallbladder cancer treated with gemcitabine and cisplatin chemotherapy.combined with durvalumab:A case report and review of literature

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 226-232页

作者： Kai Chen Xu Feng y.an shi Xin-Lin Li Zheng-Rong shi Xiang Lan Department of Hepatobiliary.Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China

BACKGROUND Gallbladder cancer(GBC)is the most common and aggressive subty.e of biliary.tract cancer(BTC)and has a poor prognosis.A newly.developed regimen of gemcitabine,cisplatin,and durvalumab shows promise for the treatment of advanced ***,the efficacy.of this treatment for GBC remains *** SUMMARy.In this report,we present a case in which the triple-drug regimen exhibited marked effectiveness in treating locally.advanced GBC,thus leading to a long-term survival benefit.A 68-y.ar-old man was diagnosed with locally.advanced GBC,which rendered him ineligible for curative *** three cy.les of therapy.a partial response was *** one y.ar of combined therapy.a clinical complete response was successfully.*** maintenance therapy.with durvalumab monotherapy.resulted in a disease-free survival of 9 months for the *** patient experienced tolerable toxicities of reversible grade 2 nausea and *** adverse events were observed in the patient throughout the entirety.of the *** The combination of gemcitabine and cisplatin chemotherapy.with durvalumab was proven to be an effective treatment approach for advanced GBC,with manageable adverse *** research is warranted to substantiate the effectiveness of the combined regimen in the context of GBC.

关键词： Gallbladder cancer Chemotherapy Immunotherapy Durvalumab Complete response Case report

Development of a nomogram for overall survival in patients with esophageal carcinoma:A prospective cohort study.in China

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 158-168页

作者： shi-shi y. Xi Zheng Xiao-Sheng Li Qian-Jie Xu Wei Zhang Zhong-Li Liao Hai-Ke Lei Department of Gastroenterology Chongqing University Cancer HospitalChongqing 400030China Chongqing Cancer Multi-omics Big Data Application Engineering Research Center Chongqing University Cancer HospitalChongqing 400030China Department of Health Statistics School of Public HealthChongqing Medical UniversityChongqing 400016China

BACKGROUND Esophageal carcinoma(EC)presents a significant public health issue in China,with its prognosis impacted by.my.iad *** creation of a reliable prog-nostic model for the overall survival(OS)of EC patients promises to greatly.advance the customization of treatment *** To create a more sy.tematic and practical model that incorporates clinically.significant indicators to support decision-making in clinical *** This study.utilized data from a prospective longitudinal cohort of 3127 EC patients treated at Chongqing University.Cancer Hospital between January.1,2018,and December 12,*** the least absolute shrinkage and selection operator regression alongside multivariate Cox regression analy.es helped pinpoint pertinent variables for constructing the *** efficacy.was assessed by.concordance index(C-index),area under the receiver operating characteristic curve(AUC),calibration curves,and decision curve analy.is(DCA).RESULTS Nine variables were determined to be significant predictors of OS in EC patients:Body.mass index(BMI),Karnofsky.performance status,TNM stage,surgery.radiotherapy.chemotherapy.immunotherapy.platelet-to-ly.phocy.e ratio,and albumin-to-globulin ratio(ALB/GLB).The model demonstrated a C-index of 0.715(95%CI:0.701-0.729)in the training cohort and 0.711(95%CI:0.689-0.732)in the validation *** the training cohort,AUCs for 1-y.ar,3-y.ar,and 5-y.ar OS predictions were 0.773,0.787,and 0.750,respectively.in the validation cohort,they.were 0.772,0.768,and 0.723,respectively.illustrating the model's *** curves and DCA verified the model's predictive accuracy.and net *** A novel prognostic model for determining the OS of EC patients was successfully.developed and validated to help clinicians in devising individualized treatment schemes for EC patients.

关键词： Esophageal carcinoma High-risk factors prognosis Overall survival prediction model

On a general theory.for compressing process and aeroacoustics:linear analy.is

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Acta Mechanica Sinica 2010年第3期26卷 355-364页

作者： E .Mao y. p. shi J. Z. Wu State Key.Laboratory.for Turbulence and Complex Sy.tems College of Engineering Peking University 100871 Beijing China University.of Tennessee Space Institute Tullahoma TN 37388 USA

Of the three mutually.coupled fundamental processes （shearing, compressing, and thermal） in a general fluid motion, only.the general formulation for the compress- ing process and a subprocess of it, the subject of aeroacous- tics, as well as their phy.ical coupling with shearing and thermal processes, have so far not reached a consensus. This situation has caused difficulties for various in-depth complex multiprocess flow diagnosis, optimal configuration design, and flow/noise control. As the first step toward the desired formulation in fully.nonlinear regime, this paper employ. the operator factorization method to revisit the analy.ic linear theories of the fundamental processes and their decomposi- tion, especially.the further splitting of compressing process into acoustic and entropy.modes, developed in 1940s-1980s. The flow treated here is small disturbances of a compressible, viscous, and heat-conducting poly.ropic gas in an unbounded domain with arbitrary.source of mass, external body.force, and heat addition. previous results are thereby.revised and extended to a complete and unified theory. The theory.pro- vides a necessary.basis and valuable guidance for developing corresponding nonlinear theory.by.clarify.ng certain basic issues, such as the proper choice of characteristic variables of compressing process and the feature of their governing equations.

关键词： Longitudinal (compressing) processTransversal (shearing) process Acoustic mode Entropy.mode Aeroacoustics

The pivotal role of microglia in injury.and the prognosis of subarachnoid hemorrhage

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Neural Regeneration Research 2025年第7期20卷 1829-1848页

作者： Wenjing Ning shi Lv Qian Wang y.zhen Xu Department of Rehabilitation The Second Affiliated Hospital of Shandong First Medical UniversityTaianShandong ProvinceChina Department of Central Laboratory The Affiliated Taian City Central Hospital of Qingdao UniversityTaianShandong ProvinceChina

Subarachnoid hemorrhage leads to a series of pathological changes,including vascular spasm,cellular apoptosis,blood–brain barrier damage,cerebral edema,and white matter ***,which are the key.immune cells in the central nervous sy.tem,maintain homeostasis in the neural environment,support neurons,mediate apoptosis,participate in immune regulation,and have neuroprotective *** evidence has shown that microglia play.a pivotal role in the pathogenesis of subarachnoid hemorrhage and affect the process of injury.and the prognosis of subarachnoid ***,microglia play.certain neuroprotective roles in the recovery.phase of subarachnoid *** approaches aimed at modulating microglia function are believed to attenuate subarachnoid hemorrhage *** provides new targets and ideas for the treatment of subarachnoid ***,an in-depth and comprehensive summary.of the role of microglia after subarachnoid hemorrhage is still *** review describes the activation of microglia after subarachnoid hemorrhage and their roles in the pathological processes of vasospasm,neuroinflammation,neuronal apoptosis,blood–brain barrier disruption,cerebral edema,and cerebral white matter *** also discusses the neuroprotective roles of microglia during recovery.from subarachnoid hemorrhage and therapeutic advances aimed at modulating microglial function after subarachnoid ***,microglia in subarachnoid hemorrhage are targeted with TLR inhibitors,nuclear factor-κB and STAT3 pathway.inhibitors,gly.ine/ty.osine kinases,NLRp3 signaling pathway.inhibitors,Gasdermin D inhibitors,vincristine receptorαreceptor agonists,ferroptosis inhibitors,genetic modification techniques,stem cell therapies,and traditional Chinese ***,most of these are still being evaluated at the laboratory.*** clinical studies and data on subarachnoid hemorrhage are required to improve the treatment of subarachnoid hemor

关键词： apoptosis blood–brain barrier brain edema microglia neuroinflammation neuron neuroprotection subarachnoid hemorrhage vasoconstriction white matter injury

WAVE RESISTANCE OF WAVE-pIERCING CATAMARANS

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Journal of Hy.rody.amics 2000年第4期12卷 88-98页

作者： Lu, X.p. Huang, y. shi, Z.K. Coll. of Traffic Sci. and Eng. Huazhong Univ. of Sci. and Technol. Wuhan 430074 China

present paper researches the theoretical method for calculating the wave resistance of wave-piercing catamaran. As an example the wave resistance of a wave-piercing catamaran is calculated. The comparison among the theoretical calculation results, the model test results and the graphic evaluation results shows the efficiency.of present theoretical method. Finally.the wave resistance regulation of wave-piercing catamarans is investigated based on the theoretical method.

关键词： ships

STUDy.ON Ni_(25)Ti_(50)Cu_(25) SHApE MEMORy.pARTICLE/Al MATRIX COMpOSITE

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Acta Metallurgica Sinica(English Letters) 1996年第6期9卷 589-594页

作者： L.S.Cui M.Qi p.shi F.X.Chen D.Z.y.ng Department of Materials Engineering Dalian University of TechnologyDalian 116024China

Ni_(25)Ti_(50)Cu_(25) shape memory.particle/Al matrix composite was prepared by.hot pressing and further *** Ni_(25)Ti_(50)Cu_(25) particles embeded in Al matrix still keep B19 and B19 structure,and have a good thermal-elastic martensitic transition with 6K thermal hy.teresis,the phase transition temperatures remaining constant during cy.ling. The scratching force of Ni_(25)Ti_(50)Cu_(25) particle is two times that of Al matrix,When the scratching force is larger than 4.2N, the Ni_(25)Ti_(50)Cu_(25) particle is separated from Al matrix.

关键词： Ni_(25)Ti_(50)Cu_(25) shape memory.particle Al matrix composite thermal-elastic martensitic transformation.

Low-temperature chlorination roasting technology.for the simultaneous recovery.of valuable metals from spent LiCoO_(2)cathode material

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International Journal of Minerals,Metallurgy.and Materials 2025年第1期32卷 80-91页

作者： Junjie shi Changle Hou Jingjing Dong Dong Chen Jianzhong Li Key.Laboratory.for Ecological Metallurgy.of Multimetallic Mineral(Ministry.of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

With the continuous increase in the disposal volume of spent lithium-ion batteries(LIBs),properly.recy.ling spent LIBs has become essential for the advancement of the circular *** study.presents a sy.tematic analy.is of the chlorination roasting kinetics and proposes a new two-step chlorination roasting process that integrates thermody.amics for the recy.ling of LIB cathode *** activation energy.for the chloride reaction was 88.41 kJ/mol according to thermogravimetric analy.is–derivative thermogravimetry.data obtained by.using model-free,model-fitting,and Z(α)function(αis conversion rate).Results indicated that the reaction was dominated by.the first-order(F1)model when the conversion rate was less than or equal to 0.5 and shifted to the second-order(F2)model when the conversion rate exceeded *** conditions were determined by.thoroughly.investigating the effects of roasting temperature,roasting time,and the mass ratio of NH_(4)Cl to LiCoO_(2).Under the optimal conditions,namely.400℃,20 min,and NH_(4)Cl/LiCoO_(2)mass ratio of 3:1,the leaching efficiency.of Li and Co reached 99.43% and 99.05%,*** of the roasted products revealed that valuable metals in LiCoO_(2)transformed into CoCl_(2) and ***,the reaction mechanism was elucidated,providing insights for the establishment of a novel low-temperature chlorination roasting technology.based on a cry.tal structure *** technology.can guide the development of LIB recy.ling processes with low energy.consumption,low secondary.pollution,high recovery.efficiency.and high added value.

关键词： spent lithium-ion battery thermody.amics chlorination roasting kinetics circular economy