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DFT calculation on p-xylene sensing mechanism of (C_(4)H_(9)NH_(3))_(2)PbI_(4) single crystal based on physisorption

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Rare Metals 2021年第6期40卷 1571-1577页

作者： meng-ya zhu Ping He Xue-Li yang Guang-Ze Hui Cheng-Chun Tang Guo-Feng Pan Li-Jian Bie School of Electronics and Information Engineering Tianjin Key Laboratory of Electronic Materials and DevicesHebei University of TechnologyTianjin 300401China School of Materials Science and Engineering Tianjin Key Laboratory for Photoelectric Materials and DevicesTianjin University of TechnologyTianjin 300384China School of Artificial Intelligence Hebei University of TechnologyTianjin 300401China School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China

P-xylene(p-C_(8)H_(10))is extremely harmful and dangerous to human health due to high toxicity and strong *** sensitive material to effectively detect p-xylene is of *** this paper,perovskite single crystal(C_(4)H_(9)NH_(3))_(2)PbI_(4) has been successfully synthesized via solution *** obtained product was analyzed by single crystal X-ray *** the space group Pbca,orthorhombic(C_(4)H_(9)NH_(3))_(2)PbI_(4) layered perovskite structure consists of an extended two-dimensional network of corner-sharing PbI_(6) *** layer perovskite sheets of distorted PbI_(6) octahedron alternated with protonated n-butylammonium cation bilayers,which offers many advantages and provides the possibility of forming a gas sensor device based on the change of *** functional theory(DFT)simulations regarding the adsorption energy revealed that this organicinorganic hybrid perovskite compound has excellent selectivity toward p-xylene compared with other gases including C_(2)H_(5)OH,C_(6)H_(6),CH_(2)Cl_(2),HCHO,CH_(3)COCH_(3) and C_(7)H_(8).The calculation of electron density,density of states and electron density difference showed the sensing mechanism of p-C_(8)H_(10) is mainly derived from physical adsorption-desorption in view of electron transfer.

关键词： Perovskite single crystal(C_(4)H_(9)NH_(3))_(2)PbI_(4) p-xylene gas sensor Density functional theory(DFT)calculation Physical adsorption-desorption mechanism

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Serum gastrin-17 concentration for prediction of upper gastrointestinal tract bleeding risk among peptic ulcer patients

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World Journal of Clinical Cases 2021年第35期9卷 10948-10955页

作者： Jun-Xian Wang Yu-Ping Cao Peng Su Wei He Xiao-Ping Li ya-meng zhu Department of Gastroenterology The Second People’s Hospital of Anhui ProvinceHefei 230011Anhui ProvinceChina

BACKGROUND Serum gastrin-17(G-17),pepsinogen I(PGI),and pepsinogen II(PGII)concentrations regulate gastric acid secretion,and hypersecretion of gastric acid increases the risks of peptic ulcer and upper gastrointestinal *** associations suggest that serum G-17,PGI,and(or)PGII may predict gastrointestinal bleeding risk among peptic ulcer *** To evaluate the efficacies of serum G-17,PGI,PGII,and PGI/PGII ratio(PGR)for predicting upper gastrointestinal bleeding among peptic ulcer *** A total of 199 patients diagnosed with peptic ulcer confirmed by gastroscopy and positivity for Helicobacter pylori by the 14C-urea breath test were recruited,including 107 patients with simple peptic ulcer and 92 cases complicated by upper gastrointestinal *** PGI,PGII,G-17,and PGR were measured by immune methods and compared between bleeding and non-bleeding groups by univariate *** specificity and sensitivity of PGs and G-17 for evaluating upper gastrointestinal bleeding risk were then assessed by constructing receiver operating characteristic(ROC)*** Serum G-17 was significantly higher among peptic ulcer patients with upper gastrointestinal bleeding compared to simple peptic ulcer patients(25.34±14.29 vs 8.84±8.03 pmol/L,t=9.822,P0.05).The risk of bleeding was significantly higher among peptic ulcer patients with elevated serum G-17(>15 pmol/L)compared to patients with normal or low serum G-17(73.2%vs 27.4%,χ2=40.72,P<0.01).The area under the ROC curve for serum G-17 was 0.866±0.024,and a cut-off of 9.86 pmol/L yielded 90.2%sensitivity and 68.2%specificity for distinguishing peptic ulcer with and without upper gastrointestinal *** Serum G-17 is significantly upregulated in peptic ulcer patients and higher levels are predictive of upper gastrointestinal ***,serum PGI,PGII,and PGR

关键词： Peptic ulcer Upper gastrointestinal bleeding Gastrin Pepsinogen Receiver operating characteristic curve

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Dip2a regulates stress susceptibility in the basolateral amygdala

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Neural Regeneration Research 2025年第6期20卷 1735-1748页

作者： Jing Li Zixuan He Weitai Chai meng Tian Huali Yu Xiaoxiao He Xiaojuan zhu Key Laboratory of Molecular Epigenetics Ministry of Education Institute of Genetics and CytologyNortheast Normal UniversityChangchunJilin ProvinceChina

Dysregulation of neurotransmitter metabolism in the central nervous system contributes to mood disorders such as depression, anxiety, and post–traumatic stress disorder. Monoamines and amino acids are important types of neurotransmitters. Our previous results have shown that disco-interacting protein 2 homolog A(Dip2a) knockout mice exhibit brain development disorders and abnormal amino acid metabolism in serum. This suggests that DIP2A is involved in the metabolism of amino acid–associated neurotransmitters. Therefore, we performed targeted neurotransmitter metabolomics analysis and found that Dip2a deficiency caused abnormal metabolism of tryptophan and thyroxine in the basolateral amygdala and medial prefrontal cortex. In addition, acute restraint stress induced a decrease in 5-hydroxytryptamine in the basolateral amygdala. Additionally, Dip2a was abundantly expressed in excitatory neurons of the basolateral amygdala, and deletion of Dip2a in these neurons resulted in hopelessness-like behavior in the tail suspension test. Altogether, these findings demonstrate that DIP2A in the basolateral amygdala may be involved in the regulation of stress susceptibility. This provides critical evidence implicating a role of DIP2A in affective disorders.

关键词： 5-hydroxytryptamine acute restraint stress basolateral amygdala CaMKII neurons DIP2A metabolomics neurotransmitters principal component analysis stress susceptibility tryptophan

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Near-perfect replication on amorphous alloys through active force modulation based on machine learning/neural network parameter prediction

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 181-191页

作者： Senkuan meng Zheng Wang Ruisong zhu Ruijie Liu Jiang Ma Lina Hu Weihua Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) School of Materials Science and Engineering Shandong University College of Mechatronics and Control Engineering Shenzhen University Songshan Lake Materials Laboratory Institute of Physics Chinese Academy of Sciences

As a microforming technique, micro/nano-structural replication possesses advantages of high precision and efficiency. With the remarkable superplasticity in the supercooled liquid region, amorphous alloys or metallic glasses(MGs) are regarded as ideal materials for miniature fabrication. However, due to the intrinsic metastable nature of supercooled liquids, the design of imprinting processes for MGs poses a challenge. In the past, process parameters have largely relied on trial-and-error *** this work, a low-frequency active force modulation system is employed to apply a stable, precise, and real-time feedback stress field for imprinting of MG samples. Low-frequency vibrations can facilitate the filling of microstructures on the template surface by reducing the effective viscosity of the supercooled liquid. With the dataset composed of orthogonal experiments, a machine learning strategy based on back-propagation(BP) neural networks was utilized to construct a 3D parameter space for temperature, stress, and time, and to predict the corresponding filling ratio. Furthermore, the optimal combination of imprinting process parameters was identified, and its filling ratio was experimentally validated to reach as high as 0.94. The near-perfect replication of microstructures confirms the superiority of the active force modulation system and the data-driven strategy of machine learning-assisted parameter design. At the same time, this one-step microforming process provides a new approach to addressing the accuracy-cost trade-off dilemma in precision manufacturing.

关键词： metallic glass amorphous alloy microforming imprinting machine learning

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草莓渗透脱水试验研究

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食品科技 2010年第5期35卷 51-53页

作者：骆少嘉袁亚朱梦矣浙江省农业科学院食品研究所杭州310021

采用葡萄糖溶液作为渗透液,以葡萄糖溶液的浓度、渗透时间和渗透温度为因素,通过正交试验设计,分析各因素对草莓渗透脱水率的影响。结果表明,温度是影响失水率的最主要因素,其次是浓度,渗透时间的影响最小;同时,确定了渗透脱水的最佳方案。

关键词：草莓渗透脱水葡萄糖

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血小板衍生生长因子、骨保护素对体外培养成骨细胞的功能影响

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激光杂志 2005年第3期26卷 94-95页

作者：张冬根谭颖徽裘松波牙祖蒙张纲王建华第三军医大学附属新桥医院口腔科重庆400037

目的:研究血小板衍生生长因子(platelet-derivedgrowthfactor ,PDGF)对成骨细胞(osteoblast,OB)的功能影响及PDGF与骨保护素(os teoprotegerin ,OPG)在成骨细胞中表达的关系。方法:用酶消化和组织块移行生长相结合的方法,从幼兔颅骨中... 详细信息

目的:研究血小板衍生生长因子(platelet-derivedgrowthfactor ,PDGF)对成骨细胞(osteoblast,OB)的功能影响及PDGF与骨保护素(os teoprotegerin ,OPG)在成骨细胞中表达的关系。方法:用酶消化和组织块移行生长相结合的方法,从幼兔颅骨中分离出成骨细胞进行培养,应用组织学和酶细胞化学对其生物学特性进行鉴定,兔抗PDGF -BB、OPG抗体诱导培养成骨细胞,分析成骨细胞的增殖、分化、矿化及OPGmRNA表达。结果:PDGF -BB抗体组与对照组在成骨细胞的分化成熟及OPGmRAN表达方面有显著差异(P <0 .0 1)。结论:PDGF -BB抗体可抑制OB的分化成熟、骨质形成及OPGmRAN的表达。

关键词：成骨细胞兔抗PDGF-BB、OPG OPG mRNA表达

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Modification of Maxwell model for conductivity prediction of carbon nanotubes-filled polymer composites with tunneling effect

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 25-36页

作者： Jue zhu Longyuan LI Ningtao zhu Zhejiang Provincial Engineering Research Center for the Safety of Pressure Vessel and Pipeline Key Laboratory of Impact and Safety Engineering (Ningbo University) Ministry of Education School of Engineering Computing and Mathematics University of Plymouth Xi'an Zhanshi Testing & Engineering Co.Ltd.

Carbon nanotubes(CNTs) have garnered great attention in recent years due to their outstanding electrical, thermal, and mechanical properties. The incorporation of small amounts of CNTs in polymers can substantially improve the sensitivity of the polymer's electrical conductivity. This paper presents a modified Maxwell model to evaluate the electrical conductivity of CNTs-filled polymer composites by introducing a transition zone to account for the tunneling effect. In this modified Maxwell model, the CNTs-filled polymer composite is modeled as a three-phase composite, consisting of a matrix(polymer), inclusions(CNTs), and a transition zone(tunneling zone). The effective electrical conductivity(EEC) of the composite is calculated based on the volume fractions and electrical conductivities of the matrix, inclusions, and transition zone. The model's validity is confirmed through the use of available test data, which demonstrates its capability to accurately capture the nonlinear conductivity behavior observed in CNTs-polymer composites. This study offers valuable insights into the design of high-performance conductive polymer nanocomposites, and enhances the understanding of electrical conduction mechanisms in CNT-dispersed polymer composites.

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基于镜像神经元理论的运动观察方案对脑卒中患者上肢康复与生活质量的影响

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心血管康复医学杂志 2016年第5期25卷 474-477页

作者：许继旭缪亚萍朱朦无锡市第八人民医院康复科江苏无锡214000 无锡市锡山区锡北人民医院康复医学科

目的:探究基于镜像神经元理论的运动方案对脑卒中患者上肢康复与生活质量的影响。方法:选择在我院接受治疗的90例脑卒中患者,按照随机数字法分为常规康复组(45例)和运动康复组(45例,在常规康复组基础上给予运动方案),采用简式肢体功能... 详细信息

目的:探究基于镜像神经元理论的运动方案对脑卒中患者上肢康复与生活质量的影响。方法:选择在我院接受治疗的90例脑卒中患者,按照随机数字法分为常规康复组(45例)和运动康复组(45例,在常规康复组基础上给予运动方案),采用简式肢体功能评定量表(FMA)、巴塞尔指数(BI)和卒中专门生活质量量表(SS-QOL)评定患者的上肢能力和生活质量。结果:两组治疗4周、8周、16周后FMA、BI、SS-QOL得分均较前明显提高,与常规康复组比较,运动康复组治疗4周、8周、16周后FMA[4周:(25.17±8.52)分比(32.27±8.74)分]、BI[4周:(42.83±15.61)分比(65.37±11.33)分]、SS-QOL[4周:(70.28±11.52)分比(75.37±10.58)分]得分提高更显著(P均<0.05)。结论:基于镜像神经元理论的运动方案对脑卒中患者上肢康复与生活质量有显著改善作用,值得推广。

关键词：镜像神经元卒中上肢

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Impacts of the annual cycle of background SST in the tropical Pacific on the phase and amplitude of ENSO

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 12-17页

作者： Song Jiang Congwen zhu Ning Jiang State Key Laboratory of Severe Weather(LASW) Chinese Academy of Meteorological SciencesBeijingChina College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina

The dominant annual cycle of sea surface temperature(SST)in the tropical Pacific exhibits an antisymmetric mode,which explains 83.4%total variance,and serves as a background of El Niño-Southern Oscillation(ENSO).However,there is no consensus yet on its anomalous impacts on the phase and amplitude of *** on data during 1982-2022,results show that anomalies of the antisymmetric mode can affect the evolution of ENSO on the interannual scale via Bjerknes feedback,in which the positive(negative)phase of the antisymmetric mode can strengthen El Niño(La Niña)in boreal winter via an earlier(delayed)seasonal cycle transition and larger(smaller)annual *** magnitude of the SST anomalies in the equatorial eastern Pacific can reach more than±0.3◦C,regulated by the changes in the antisymmetric mode based on random sensitivity *** reveal the spatial pattern of the annual cycle associated with the seasonal phase-locking of ENSO evolution and provide new insight into the impact of the annual cycle of background SST on ENSO,which possibly carries important implications for forecasting ENSO.

关键词： Annual cycle SST anomaly Antisymmetric mode ENSO

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Satellite remote sensing reveals overwhelming recovery of forest from disturbances in Asia

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 46-51页

作者： Yiying zhu Hesong Wang Anzhi Zhang School of Ecology and Nature Conservation Beijing Forestry UniversityBeijingChina Key Laboratory of Regional Climate and Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Forestry and Landscape Architecture Xinjiang Agricultural UniversityUrumqiChina

Forest ecosystems play key roles in mitigating human-induced climate change through enhanced carbon uptake;however,frequently occurring climate extremes and human activities have considerably threatened the stability of *** the same time,detailed accounts of disturbances and forest responses are not yet well quantified in *** study employed the Breaks For Additive Seasonal and Trend method-an abrupt-change detection method-to analyze the Enhanced Vegetation Index time series in East Asia,South Asia,and Southeast *** approach allowed us to detect forest disturbance and quantify the resilience after *** showed that 20%of forests experienced disturbance with an increasing trend from 2000 to 2022,and Southeast Asian countries were more severely affected by ***,95%of forests had robust resilience and could recover from disturbance within a few *** resilience of forests suffering from greater magnitude of disturbance tended to be stronger than forests with lower disturbance *** summary,this study investigated the resilience of forests across the low and middle latitudes of Asia over the past two *** authors found that most forests exhibited good resilience after disturbance and about two-thirds had recovered to a better state in *** findings of this study underscore the complex relationship between disturbance and resilience,contributing to comprehension of forest resilience through satellite remote sensing.

关键词： Forest ecosystem Enhanced vegetation index Breaks for additive seasonal and trend method Disturbance Resilience

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