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分数阶脉冲中立型随机微积分方程的适定性

数学物理学报（A辑） 2015年第2期35卷 405-421页

作者： diem dang huan 高洪俊南京师范大学数学科学学院数学研究所南京210023 北江农林大学基础科学学院

利用Sadovskii不动点定理以及α-预解算子理论讨论了一类在Hilbert空间中带无限时滞的分数阶脉冲中立型随机微积分方程温和解的适定性,并通过举例说明了结果的有效性.

关键词： α-预解算子分数阶随机微积分方程相空间中立型脉冲 Sadovskii不动点定理

带泊松跳的中立型随机微积分方程的存在唯一性和稳定性(英文)

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数学杂志 2013年第6期33卷 1043-1058页

作者：阎登勋南京师范大学数学科学学院南京210023 北江农林大学基础科学学院

本文研究了一类带泊松跳的中立型随机微积分方程(NSIDEPJs).利用Picard迭代法和Bihari不等式的一个推论,在一类广义利普希茨条件下获得了希尔伯特空间中NSIDEPJs温和解的存在唯一性和稳定性,改进和推广了已有的结果.最后,举例说明本文... 详细信息

本文研究了一类带泊松跳的中立型随机微积分方程(NSIDEPJs).利用Picard迭代法和Bihari不等式的一个推论,在一类广义利普希茨条件下获得了希尔伯特空间中NSIDEPJs温和解的存在唯一性和稳定性,改进和推广了已有的结果.最后,举例说明本文结果的有效性.

关键词：预解算子中立型随机微积分方程 Picard迭代泊松跳

Forecasting measured responses of structures using temporal deep learning and dual attention

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Frontiers of Structural and Civil Engineering 2024年第6期18卷 832-850页

作者： Viet-Hung dang Trong-Phu NGUYEN Thi-Lien PHAM huan X.NGUYEN Department of Structural Mechanics Hanoi University of Civil EngineeringHanoi 11600Vietnam Faculty of Applied Science University of Economics-Technology for IndustriesHanoi 11600Vietnam London Digital Twin Research Centre Faculty of Science and TechnologyMiddlesex UniversityLondon NW44BTUK International School Vietnam National UniversityHanoi 11600Vietnam

The objective of this study is to develop a novel and efficient model for forecasting the nonlinear behavior of structures in response to time-varying random *** key idea is to design a deep learning architecture to leverage the relationships,between external excitations and structure's vibration signals,and between historical values and future values,within multiple time-series *** proposed method consists of two main steps:the first step applies a global attention mechanism to combine multiple-measured time series and time-varying excitation into a weighted time series before feeding it to a temporal architecture;the second step utilizes a self-attention mechanism followed by a fully connected layer to predict multi-step future *** viability of the proposed method is demonstrated via two case studies involving synthetic data from a three-dimensional(3D)reinforced concrete structure and experimental data from an 18-story steel ***,comparison and robustness studies are carried out,showing that the proposed method outperforms conventional methods and maintains high performance in the presence of noise with an amplitude of less than 10%.

关键词： structural dynamic time-varying excitation deep learning signal processing response forecasting

Microstructure and Mechanical Behavior of Mg-Based Bimetal Plates with High Formability Sleeve by Co-extrusion

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Acta Metallurgica Sinica(English Letters) 2024年第3期37卷 499-512页

作者： Yue-Hui dang Sheng-Lin Liu Xiao-Lei Ai Xiao-Wei Feng Bo Feng Zhuo Tian Ying-Fei Lin huan-Tao Chen Kai-Hong Zheng School of Materials Science and Engineering Chang’an UniversityShaanxi 710064China Guangdong Key Laboratory of Metal Toughening Technology and Application Institute of New MaterialsGuangdong Academy of SciencesGuangzhou 510650China

In this study,microstructure and mechanical behavior of two types of Mg-based bimetal plates with a high formability sleeve were systematically studied,with a great emphasis on the effect of the interface characteristic and the sleeve fraction on the plasticity of composite *** rule of mixtures(ROM)for elongation was also *** results show that when there is no or thin diffusion layer with thickness of about 3μm,Mg-based bimetal plates have a good plasticity with elongation of about 19-24%,and the ROM predicted elongations are very close to the experimental *** contrast,with a diffusion layer about 95-155μm thick,Mg-based bimetal plates exhibit a poor plasticity with elongation of about 11-17%,and the experimental elongations largely deviate from the ROM *** plasticity of Mg-based bimetal plates increases with increasing sleeve *** study provides new insights on the plastic deformation of Mg-based bimetal composites with a high formability sleeve.

关键词： Mg-based composites Co-extrusion Microstructure Mechanical behavior Plastic deformation

Dajianzhong decoction:a review of its phytochemistry and therapeutic potential for gastrointestinal disease

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Integrative Medicine Discovery 2024年第25期8卷 1-9页

作者： huan-Qing Gao Zhe Lu Ming dang Yao Li Meng-Meng Zhang Li Ou College of Pharmacy Shaanxi University of Chinese MedicineXianyang 712046China.

Dajianzhong decoction(DJZD)is one of the traditional herbal prescriptions originated from Synopsis of Golden Chamber,which clinically used for the treatment of various gastrointestinal(GI)*** paper was aimed to provide a systematic review on the phytochemistry of DJZD and its therapeutic potential for GI disease and the ***,the possible development and perspectives for future research on this prescription were also *** date,over 60 compounds have been identified form DJZD,including unsaturated fatty acid,saponins,and polyphenols,with hydroxy-sanshool and ginsenoside compounds as the predominant *** possessed widely pharmacological activities on the GI disease from the Eastern Han Dynasty to the present,such as intestinal obstruction,colitis,and irritable bowel *** for the intestinal obstruction,it had demonstrated the efficacy of DJZD treatment for relief of postoperative ileus in patients undergoing surgery for GI *** detailed mechanism was mainly related with NF-ᴋB signaling ***,further research elucidating the protective effects of DJZD on GI disease,exploring new clinical effects,as well as establishing criteria for quality control for DJZD should be studied.

关键词： Dajian zhong decoction gastrointestinal diseases intestinal obstruction sanshool NF-ᴋB pathway

Prevalence, risk factors, and BRAF mutation of colorectal sessile serrated lesions among Vietnamese patients

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World Journal of Clinical Oncology 2024年第2期15卷 290-301页

作者： Nhu Thi Hanh Vu Huy Minh Le diem Thi-Ngoc Vo Hoang Anh Vu Nhan Quang Le Dung dang Quy Ho Duc Trong Quach Department of Internal Medicine University of Medicine and Pharmacy at Ho Chi Minh CityHo Chi Minh 700000Viet Nam GI Endoscopy Department University Medical Center at Ho Chi Minh CityHo Chi Minh 700000Viet Nam Department of Histology-Embryology and Pathology University of Medicine and Pharmacy at Ho Chi Minh CityHo Chi Minh 700000Viet Nam Center for Molecular Biomedicine University of Medicine and Pharmacy at Ho Chi Minh CityHo Chi Minh 700000Viet Nam Department of Endoscopy Cho Ray HospitalHo Chi Minh 700000Viet Nam

BACKGROUND Sessile serrated lesions(SSLs)are considered precancerous colorectal lesions that should be detected and removed to prevent colorectal *** studies in Vietnam mainly investigated the adenoma pathway,with limited data on the serrated *** To evaluate the prevalence,risk factors,and BRAF mutations of SSLs in the Vietnamese *** This is a cross-sectional study conducted on patients with lower gastrointestinal symptoms who underwent colonoscopy at a tertiary hospital in *** were diagnosed on histopathology according to the 2019 World Health Organi-zation *** mutation analysis was performed using the Sanger DNA sequencing *** multivariate logistic regression model was used to determine SSL-associated *** There were 2489 patients,with a mean age of 52.1±13.1 and a female-to-male ratio of 1:*** prevalence of SSLs was 4.2%[95%confidence interval(CI):3.5-5.1].In the multivariate analysis,factors significantly associated with SSLs were age≥40[odds ratio(OR):3.303;95%CI:1.607-6.790],male sex(OR:2.032;95%CI:1.204-3.429),diabetes mellitus(OR:2.721;95%CI:1.551-4.772),and hypertension(OR:1.650,95%CI:1.045-2.605).The rate of BRAF mutations in SSLs was 35.5%.CONCLUSION The prevalence of SSLs was 4.2%.BRAF mutations were present in one-third of *** risk factors for SSLs included age≥40,male sex,diabetes mellitus,and hypertension.

关键词： Colorectal cancer Sessile serrated lesion BRAF mutation Risk factors Diabetes mellitus Hypertension

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一种低剖面宽波束双圆极化扫描阵列设计方法

电讯技术 2024年第10期64卷 1599-1604页

作者：王力杜春野党欢靳博川中国航空工业集团公司西安航空计算技术研究所西安710068 西安电子科技大学广州研究院广州510555

设计了一种用于卫星通信的低剖面宽波束双圆极化扫描阵列天线。天线阵元采用十字形贴片的形式,使用改进的共面耦合探针结构来实现较好的匹配性能并降低剖面高度。在天线阵元4个角放置矩形金属块,用于改善天线的波束宽度。在天线底部增... 详细信息

设计了一种用于卫星通信的低剖面宽波束双圆极化扫描阵列天线。天线阵元采用十字形贴片的形式,使用改进的共面耦合探针结构来实现较好的匹配性能并降低剖面高度。在天线阵元4个角放置矩形金属块,用于改善天线的波束宽度。在天线底部增加了匹配网络,引入非辐射模式,实现了双谐振,进一步优化了天线的阻抗带宽。该天线阵元实现了可覆盖频段(上行:889~904 MHz,下行:934~949 MHz)的阻抗带宽,在频段内大于92°的半功率波束宽度,同时实现了大于5 dBi的峰值增益,且天线的剖面高度仅为0.03λ0。采用矩形栅格布阵将该阵元组成8×8阵列,最终可实现俯仰60°下17.56 dB的可实现增益覆盖,波束扫描至60°时,可实现增益的扫描下降都在4.5 dB以内,且不同扫描角度下阵列轴比小于3 dB。该天线可用于运营商LTE band8频段的卫星通信。

关键词：卫星通信阵列天线低剖面宽波束双圆极化 LTE band8频段

司库奇尤单抗联合卡泊三醇乳膏治疗中重度银屑病患者的效果

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中国民康医学 2024年第13期36卷 78-80,84页

作者：骆焕党梦娜驻马店市第一人民医院皮肤科河南驻马店463000

目的:观察司库奇尤单抗联合卡泊三醇乳膏治疗中重度银屑病患者的效果。方法:选取2021年1月至2023年6月该院收治的68例中重度银屑病患者进行前瞻性研究,按照随机数字表法将其分为对照组和观察组各34例。对照组给予卡泊三醇乳膏治疗,观察... 详细信息

目的:观察司库奇尤单抗联合卡泊三醇乳膏治疗中重度银屑病患者的效果。方法:选取2021年1月至2023年6月该院收治的68例中重度银屑病患者进行前瞻性研究,按照随机数字表法将其分为对照组和观察组各34例。对照组给予卡泊三醇乳膏治疗,观察组在对照组基础上联合司库奇尤单抗治疗。比较两组临床疗效、临床症状消失时间、皮肤屏障功能指标[皮脂含量、角质层含水量、经表皮水分丢失量(TEWL)]水平、血清学指标[白细胞介素-2(IL-2)、γ干扰素(IFN-γ)]水平及不良反应发生率。结果:观察组治疗总有效率为97.06%(33/34),高于对照组的76.47%(26/34),差异有统计学意义(P0.05)。结论:司库奇尤单抗联合卡泊三醇乳膏治疗中重度银屑病患者,可提高临床疗效,缩短临床症状消失时间,改善皮肤屏障功能指标和血清学指标水平,效果优于单纯卡泊三醇乳膏治疗。

关键词：银屑病司库奇尤单抗卡泊三醇乳膏临床症状皮肤屏障不良反应

Comparison of paleotemperature reconstructions using microbial tetraether thermometers of the Chinese loess-paleosol sequence for the past 350000 years

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Science China Earth Sciences 2017年第6期60卷 1159-1170页

作者： TANG ChangYan YANG huan dang XinYue XIE ShuCheng State Key Laboratory of Biogeology and Environmental Geology School of Earth Sciences China University of Geosciences Wuhan 430074 China

The recently proposed global and local calibrations for the mean annual air temperature(MAT) reconstruction on the basis of 5-and 6-methyl brGDGTs have rarely been applied to the Chinese LPS yet, leaving the applicability of these calibrations unclear. Here, we used the improved chromatography method to analyze 198 loess-paleosol samples from the Weinan section in the southern CLP for the past 350 kyr. The 6-methyl brGDGTs comprise a major proportion of total brGDGTs, pointing to alkaline conditions for most soil samples from the Weinan LPS. The decoupled profile variation of MBT′6ME and MBT′_(5ME) suggests their response to different enviromental factors, possibly soil pH(or soil moisture) and temperature, respectively. This discrimination further corraborates that temperature and monsoonal precipitation were not in phase during the last four deglaciations on the CLP. Temperature estimates for the six calibrations tested show similar trends but remarkably differ in amplitudes. The soil moisture appears to affect the global MBT′/CBT calibration, the global MATmr calibration(a calibration based on the multiple linear regression) and the Chinese local SSM(Stepwise Selection Method) calibration, resulting in a significant underestimation of late Holocene temperature. In contrast, the dry climate has no effect on the global MBT′5ME calibration. Of the six calibrations,only the Chinese local SSM calibration and global MATmr calibration produce temperature variation amplitude over the past 350 ka that is consistent with other independent proxy data. The recently proposed local calibrations based on 5-and 6-methyl brGDGTs for North China yield the amplitude of temperature changes that is much larger than the results determined by other *** the six calibrations have their own weakness in the MAT reconstruction, due partly to the inconsistency between the brGDGT distribution in the Weinan LPS and the modern soils used to establish these calibrations.

关键词： 5-methyl brGDGTs 6-methyl brGDGTs Paleotemperature Loess-paleosol sequences