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Corrosion behavior of nickel-based 718 alloy determined by in situ electrochemical methods at different partial pressures of H2S in 25 wt% NaCl solution at 150℃

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Rare Metals 2019年第9期38卷 855-863页

作者： Yu-Bi Zhang xiao-liang yang An Tang School of Mechanical Engineering Henan University of EngineeringZhengzhou 451191China Chongqing Materials Research Institute Co. LtdChonging 400707China

The corrosion behavior of nickel-based 718 alloy at seven partial pressures of H2 S(PH2 S)was investigated using electrochemical impedance spectroscopy(EIS)and polarization methods in 25 wt% NaCl solution at150℃ for 168 *** tested results show that anodic reactions are controlled alternately by the diffusion mostly,then both charge transfer and diffusion and finally charge transfer mainly with the increment of PH2 *** corrosive products are composed of sulfides and oxides of Ni,Cr and Fe with double layers for PH2 S of 5.1 and 13.0 MPa and three layers for PH2 S of 10.4 MPa according to microstructures and compositions of corrosion products characterized by the scanning electron microscope(SEM)and electron probe microanalysis(EPMA)*** inner oxides layer plays a critical role in anti-corrosion in a wet H2 S environment at high temperature and pressure.

关键词： Nickel-based 718 alloy Corrosion electrochemistry Polarization Passive film

Synthesis,structural characterization and solubility of 2-(1-substituted-1,11-undecylidene)-5-arylimino-△~3 -1,3,4-thiadiazolines

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Chinese Chemical Letters 2009年第11期20卷 1267-1270页

作者： Shu Hui Jin xiao Mei liang Xu yang Fu Heng Chen Dao Quan Wang Key Laboratory of Pesticide Chemistry and Application Technology Department of Applied Chemistry China Agricultural University Beijing 100193 China

A series of novel 2-（1-substituted-1,11-undecylidene）-5-arylimino-△^3-1,3,4-thiadiazolines （4） were synthesized and their structure was characterized by ^1H NMR, ^13C NMR and elemental analysis. Their solubility in both polar and non-polar solvents is significantly improved owing to the introduction of ethyl or methylthio group at cyclododecyl ring as compared with parent compounds [1, 2-（1,11-undecylidene）-5-arylimino-△^3-1,3,4-thiadiazolines]. However, their fungicidal activity against Rhizoctonia solani is less than that of parent compounds. X-ray diffraction analysis of a representative compound （4d） showed that the conformation of 12-membered ring is still [3333], in which the ethyl group present at the side-exo position and the thiadiazoline ring at the comer carbon. The thiadiazoline plane is perpendicular to the cyclododecyl one.

关键词： 2-(1-Substituted-1,11-undecylidene)-5-arylimino-△^3-1,3,4-thiadiazoline Solubility Crystal structure Synthesis

Application value analysis of magnetic resonance imaging and computed tomography in the diagnosis of intracranial infection after craniocerebral surgery

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World Journal of Clinical Cases 2020年第23期8卷 5894-5901页

作者： Lan Gu xiao-liang yang Hui-Kang Yin Ze-Hua Lu Cheng-Jun Geng Department of Medical Imaging Wuxi Medical College of Anhui Medical University904th Hospital of Joint Logistic Support Force of PLAWuxi 214044Jiangsu ProvinceChina

BACKGROUND Intracranial infection is a common clinical *** tomography(CT)and magnetic resonance imaging(MRI)have certain sensitivity and have good diagnostic *** To study the application value of MRI and CT in the diagnosis of intracranial infection after craniocerebral *** We selected 82 patients who underwent craniocerebral surgery(including 40 patients with intracranial infection and 42 patients without infection)during the period from April 2016 to June 2019 in our *** 82 patients received CT and MRI examinations,and their clinical data were reviewed.A retrospective analysis was performed,and the coincidence rate of positive diagnosis and the overall diagnosis coincidence rate of different pathogenic infection types were measured with the two examination *** diagnostic sensitivity and specificity as well as the positive and negative predictive values of the two examination methods were *** For all types of pathogenic infections(Staphylococcus aureus,Staphylococcus hemolyticus,Staphylococcus epidermidis,and others),MRI scans had higher positive diagnostic coincidence rates than CT scans;the overall diagnostic coincidence rate,sensitivity,specificity,positive predictive value,and negative predictive values were significantly higher with MRI examinations than with CT examinations,and the differences were statistically significant(P<0.05).CONCLUSION MRI examination can accurately diagnose intracranial infection after clinical craniocerebral *** with CT,MRI had higher diagnostic *** diagnostic sensitivity and specificity,the diagnostic coincidence rate,and the positive and negative predictive values were significantly higher with MRI than with conventional CT,which can be actively promoted.

关键词： Computed tomography Magnetic resonance imaging Craniocerebral surgery Diagnosis of intracranial infection Diagnostic efficacy Comparative study

Hardening effect of multi-energyW2+-ion irradiation on tungsten–potassium alloy

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Chinese Physics B 2020年第10期29卷 363-369页

作者： yang-Yi-Peng Song Wen-Bin Qiu Long-Qing Chen xiao-liang yang Hao Deng Chang-Song Liu Kun Zhang Jun Tang Key Laboratory of Radiation Physics and Technology of Ministry of Education Institute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031China

Tungsten is one of the most promising plasma-facing materials (PFMs) to be used in the nuclear fusion reactor as divertor material in the future. In this work, W2+-ions bombardment is used to simulate the neutron irradiation damage to commercial pure tungsten (W) and rolled tungsten–potassium (W–K). The 7 MeV of 3 × 10^15 W2+-ions/cm2, 3 MeV of 4.5 × 10^14 W2+, and 2 MeV of 3 × 10^14 W2+-ions/cm2 are applied at 923 K in sequence to produce a uniform region of 100 nm–400 nm beneath the sample surface with the maximum damage value of 11.5 dpa. Nanoindentation is used to inspect the changes in hardness and elastic modulus after self-ion irradiation. Irradiation hardening occurred in both materials. The irradiation hardening of rolled W–K is affected by two factors: one is the absorption of vacancies and interstitial atoms by potassium bubbles, and the other is the interaction between potassium bubbles and dislocations. Under the condition of 11.5 dpa, the capability of defect absorption can reach a threshold. As a result, dislocations finally dominate the hardening of rolled W–K. Specific features of dislocation loops in W–K are further observed by transmission electron microscopy (TEM) to explain the hardening effect. This work might provide valuable enlightenment for W–K alloy as a promising plasma facing material candidate.

关键词： plasma facing material tungsten-potassium alloy ion-irradiation hardening nanoindentation

Irradiation hardening behaviors of tungsten-potassium alloy studied by accelerated 3-MeV W^2+ ions

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Chinese Physics B 2020年第4期29卷 336-343页

作者： xiao-liang yang Long-Qing Chen Wen-Bin Qiu yang-Yi-Peng Song Yi Tang Xu-Dong Cui Chang-Song Liu Yan Jiang Tao Zhang Jun Tang Key Laboratory of Radiation Physics and Technology of Ministry of Education Institute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China Sichuan Research Center of New Materials Institute of Chemical MaterialsChina Academy of Engineering PhysicsMianyang 621999China Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031China

Tungsten-potassium(WK)alloy with ultrafine/fine grains and nano-K bubbles is fabricated through spark plasma sintering(SPS)and rolling *** this study,3-MeV W^2+ ion irradiation with a tandem accelerator is adopted to simulate the displacement damage caused by *** the depth of irradiation damage layer is limited to only 500 nm,the hardening behaviors of WK alloy and ITER(International Thermonuclear Experimental Reactor)-W under several damage levels are investigated through Bercovich tip nanoindentation test and other morphological *** indenter size effect(ISE),soft substrate effect(SSE),and damage gradient effect(DGE)are found to influence the measurement of *** or no pop-ins in irradiated samples are observed while visible pop-in events take place in unirradiated *** pile-up with different morphology features around the indentation exists in both WK and *** WK shows a smaller hardness increment than ITER-W under the same condition of displacement *** study provides beneficial information for WK alloy serving as a promising plasma facing materials(PFMs)candidate.

关键词： irradiation harden spark plasma sintering WK alloy nanoindentation

某多管火箭武器射击密集度试验减少用弹量研究

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兵工学报 2017年第6期38卷 1067-1074页

作者：于存贵梁晓扬朱志敏南京理工大学机械工程学院江苏南京210094 湖北江山重工有限责任公司湖北襄阳441057

研究多管火箭炮非满管射击密集度试验方法及仿真技术,提出了一种新的减少多管火箭密集度试验用弹量的试验方法。基于虚拟样机的动力学仿真技术和多岛遗传算法(MIGA)理论,建立多管火箭炮发射动力学参数化仿真计算模型,将其集成在多学科... 详细信息

研究多管火箭炮非满管射击密集度试验方法及仿真技术,提出了一种新的减少多管火箭密集度试验用弹量的试验方法。基于虚拟样机的动力学仿真技术和多岛遗传算法(MIGA)理论,建立多管火箭炮发射动力学参数化仿真计算模型,将其集成在多学科优化设计软件ISIGHT框架中,采用MIGA作为优化控制策略,形成了基于等起始扰动偏差思想的多管火箭炮非满管装填射击密集度试验方案。对满管齐射和非满管连续射击方案的起始扰动和射击密集度进行仿真计算。仿真结果表明,两种方案起始扰动相同,系统密集度预测值满足F检验条件,证明提出的非满管装填射击密集度试验方案是完全可行的,形成的非满管连续射击密集度试验方案可减少试验用弹量41.7%.

关键词：兵器科学与技术多管火箭炮虚拟样机仿真多岛遗传算法非满管试验方法密集度等起始扰动偏差

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真实气体效应下高马赫数内转进气道特性研究

推进技术 2020年第7期41卷 1473-1483页

作者：代春良孙波梁晓扬卓长飞张堃元南京理工大学机械工程学院江苏南京210094 南京航空航天大学能源与动力学院江苏南京210016

为初步研究高马赫数内转进气道在真实气体效应下的工作特性,首先设计额定工作状态Ma=12的高超声速内转进气道,再结合不同气体模型对其进行数值模拟。研究结果表明:化学非平衡气体在流场结构、工作性能和气动加热方面与热完全气体较为相... 详细信息

为初步研究高马赫数内转进气道在真实气体效应下的工作特性,首先设计额定工作状态Ma=12的高超声速内转进气道,再结合不同气体模型对其进行数值模拟。研究结果表明:化学非平衡气体在流场结构、工作性能和气动加热方面与热完全气体较为相近,与热化学非平衡气体存在一定差别。离解反应发生在边界层内和低速涡流区内,热化学非平衡气体的离解反应程度比化学非平衡气体大。在隔离段内激波反射处,相比完全气体,化学反应气体的静温降低了2000~2500K。高热流区在上壁面喉道位置与下壁面激波反射点位置附近,温度较高的等温壁面、热化学非平衡气体均可降低壁面热流密度,不同壁面条件对隔离段出口性能参数影响较为明显。真实气体效应、壁面温度对隔离段涡流区的影响较为复杂,有待进一步研究。

关键词：真实气体效应高马赫数内转进气道数值模拟热化学非平衡气体壁面温度进气道特性

Highly conductive and stable iodine doped argyrodite electrolyte for all-solid-state lithium batteries

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Journal of Energy Chemistry 2025年第1期100卷 50-58页

作者： Gaozhan Liu Jing Zhang Jing yang Jinghui Chen Xingyue xiao Xiayin Yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences

Lithium argyrodites with high ionic conductivity and low cost are considered as one of the most prospective solid electrolytes for all-solid-state lithium ***,the poor chemical stability and compatibility with lithium metal limit their ***,Li5.4PS4.4Cl1.4I0.2solid electrolyte with high ionic conductivity of 11.49 m S cm-1and improved chemical stability is synthesized by iodine *** ultra-thin Li5.4PS4.4Cl1.4I0.2membrane with thickness of 10μm can be obtained by wet coating process,exhibiting a high ionic conductivity of 2.09 mS cm-1and low areal resistance of 1.17Ω***,iodine doping could in-situ form LiI at the lithium/electrolyte interface and improve the critical current density of Li5.4PS4.4Cl1.6from 0.8 to 1.35 mA *** resultant LiCoO2/Li5.4PS4.4Cl1.4I0.2/Li battery shows excellent cycling stability at 1 C,with a reversible specific capacity of 110.1 mA h g-1and a retention of 80.5% after 1000 *** addition,the assembled LiCoO2/Li5.4PS4.4Cl1.4I0.2membrane/Li pouch cell delivers an initial discharge capacity of 110.4 mA h g-1and 80.5% capacity retention after 100 cycles.

关键词： Argyrodite electrolytes Iodine doping Ionic conductivity Stability All-solid-state lithium battery

Epigenetic regulation of the inflammatory response in stroke

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Neural Regeneration Research 2025年第11期20卷 3045-3062页

作者： Jingyi liang Fei yang Zixiao Li Qian Li School of Basic Medical Sciences Capital Medical UniversityBeijingChina Department of Neurobiology School of Basic Medical SciencesCapital Medical UniversityBeijingChina Laboratory for Clinical Medicine Beijing Key Laboratory of Neural Regeneration and RepairCapital Medical UniversityBeijingChina Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijingChina China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina National Center for Healthcare Quality Management in Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Chinese Institute for Brain Research BeijingChina Research Unit of Artificial Intelligence in Cerebrovascular Disease Chinese Academy of Medical SciencesBeijingChina Beijing Engineering Research Center of Digital Healthcare for Neurological Diseases BeijingChina Department of Biochemistry and Molecular Biology School of Basic Medical SciencesCapital Medical UniversityBeijingChina Beijing Key Laboratory of Cancer Invasion and Metastasis Research Capital Medical UniversityBeijingChina

Stroke is classified as ischemic or hemorrhagic,and there are few effective treatments for either *** mechanisms play a critical role in secondary brain injury following a stroke,which manifests as cytokine release,blood–brain barrier disruption,neuronal cell death,and ultimately behavioral *** the inflammatory response has been shown to mitigate this cascade of events in experimental stroke ***,in clinical trials of anti-inflammatory agents,longterm immunosuppression has not demonstrated significant clinical benefits for *** may be attributable to the dichotomous roles of inflammation in both tissue injury and repair,as well as the complex pathophysiologic inflammatory processes in *** acute harmful inflammatory responses or inducing a phenotypic shift from a pro-inflammatory to an anti-inflammatory state at specific time points after a stroke are alternative and promising therapeutic *** agents that can modulate inflammation requires a detailed understanding of the inflammatory processes of ***,epigenetic reprogramming plays a crucial role in modulating post-stroke inflammation and can potentially be exploited for stroke *** this review,we summarize current findings on the epigenetic regulation of the inflammatory response in stroke,focusing on key signaling pathways including nuclear factor-kappa B,Janus kinase/signal transducer and activator of transcription,and mitogen-activated protein kinase as well as inflammasome *** also discuss promising molecular targets for stroke *** evidence to date indicates that therapeutic targeting of the epigenetic regulation of inflammation can shift the balance from inflammation-induced tissue injury to repair following stroke,leading to improved post-stroke outcomes.

关键词： DNA methylation histone modification intracerebral hemorrhage ischemic stroke neuroinflammation neuroprotection non-coding RNA RNA methylation subarachnoid hemorrhage treatment