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Computer Modeling in Engineering & Sciences 2025年第1期142卷 405-423页

作者： Jianfeng lu Xiangye Huang Caijin Li Renlin Xin Shanqing Zhang Mahmoud Emam School of Computer Science and Technology Hangzhou Dianzi UniversityHangzhou310018China Shangyu Institute of Science and Engineering Hangzhou Dianzi UniversityShaoxing312300China Faculty of Artificial Intelligence Menoufia UniversityShebin El-Koom32511Egypt

Seal authentication is an important task for verifying the authenticity of stamped seals used in various domains to protect legal documents from tampering and *** seal inspection is commonly audited manually to ensure document ***,manual assessment of seal images is tedious and laborintensive due to human errors,inconsistent placement,and completeness of the *** image recognition systems are inadequate enough to identify seal types accurately,necessitating a neural network-based method for seal image ***,neural network-based classification algorithms,such as Residual Networks(ResNet)andVisualGeometryGroup with 16 layers(VGG16)yield suboptimal recognition rates on stamp ***,the fixed training data categories make handling new categories to be a challenging *** paper proposes amulti-stage seal recognition algorithmbased on Siamese network to overcome these ***,the seal image is pre-processed by applying an image rotation correction module based on Histogram of Oriented Gradients(HOG).Secondly,the similarity between input seal image pairs is measured by utilizing a similarity comparison module based on the Siamese ***,we compare the results with the pre-stored standard seal template images in the database to obtain the seal *** evaluate the performance of the proposed method,we further create a new seal image dataset that contains two subsets with 210,000 valid labeled pairs in *** proposed work has a practical significance in industries where automatic seal authentication is essential as in legal,financial,and governmental sectors,where automatic seal recognition can enhance document security and streamline validation ***,the experimental results show that the proposed multi-stage method for seal image recognition outperforms state-of-the-art methods on the two established datasets.

关键词： Seal recognition seal authentication document tampering siamese network spatial transformer network similarity comparison network

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水轮机主轴断裂原因分析

大电机技术 2015年第3期 50-53页

作者：卢从义王治国高秀玲丁军锋水力发电设备国家重点实验室哈尔滨150040

本文采用金相分析、光谱分析、SEM分析和ANSYS有限元分析等手段对水轮机主轴的裂纹产生原因进行了分析。分析结果表明,水轮机主轴上安装的抗磨环止口底端恰好处在熔合线上,该位置应力集中,且存在导致材料综合性能恶化的魏氏组织,运行时... 详细信息

本文采用金相分析、光谱分析、SEM分析和ANSYS有限元分析等手段对水轮机主轴的裂纹产生原因进行了分析。分析结果表明,水轮机主轴上安装的抗磨环止口底端恰好处在熔合线上,该位置应力集中,且存在导致材料综合性能恶化的魏氏组织,运行时在交变载荷作用下萌生裂纹并不断扩展,导致疲劳开裂。

关键词： 20Si Mn 主轴水轮机疲劳裂纹

大黄合剂联合雅博司对早期肝性脑病临床疗效及血氨、内毒素影响

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辽宁中医药大学学报 2017年第7期19卷 188-191页

作者：杨从意胡敬宝鲁艳平刘茜茜刘红旋深圳市宝安中医院广东深圳518101

目的:探讨大黄合剂联合雅博司对早期肝性脑病临床疗效及血氨、内毒素的影响。方法:选取我院肝胆内科收治的早期肝性脑病患者166例,按随机数字表法分组,对照组83例予以常规治疗联合门冬氨酸鸟氨酸治疗,研究组83例在对照组基础上予以大黄... 详细信息

目的:探讨大黄合剂联合雅博司对早期肝性脑病临床疗效及血氨、内毒素的影响。方法:选取我院肝胆内科收治的早期肝性脑病患者166例,按随机数字表法分组,对照组83例予以常规治疗联合门冬氨酸鸟氨酸治疗,研究组83例在对照组基础上予以大黄合剂保留灌肠治疗,观察并记录两组间肝功能和血氨指标、血清内毒素及炎症因子水平、血清神经损伤相关指标水平、神志清醒时间及认知功能,同时对比临床疗效。结果:对照组治疗有效率(74.69%)低于研究组治疗有效率(87.95%),具有统计学意义(P<0.05);与对照组比较,研究组治疗后血清ALT、AST、TBIL、NH3水平较低,治疗后血清LPS、TNF-α、IL-18、IL-6水平较低,治疗后血清β-EP、S100B、NSE水平较低,治疗后神志清醒时间较短,MMSE评分、HDS-R评分较高,具有统计学意义(P<0.05)。结论:大黄合剂联合门冬氨酸鸟氨酸治疗能够有效降低早期肝性脑病患者血氨、内毒素、炎症因子及血清β-EP、S100B、NSE水平,改善肝功能,减轻炎症反应及神经损伤,缩短患者神志清醒时间,提高认知功能,临床疗效确切。

关键词：肝性脑病大黄合剂门冬氨酸鸟氨酸临床疗效血氨内毒素

Selective electroreduction of carbon dioxide to formic acid on electrodeposited SnO_2@N-doped porous carbon catalysts

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Science China Chemistry 2018年第2期61卷 228-235页

作者： lu lu Xiaofu Sun Jun Ma Qinggong Zhu congyi Wu Dexin Yang Buxing Han Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid and Interface and Thermodynamics CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences

Electrocatalytic reduction of CO_2 is a promising route for energy storage and utilization. Herein we synthesized SnO_2 nanosheets and supported them on N-doped porous carbon (N-PC) by electrodeposition for the first time. The SnO_2 and N-PC in the SnO_2@N-PC composites had exellent synergistic effect for electrocatalytic reduction of CO_2 to HCOOH. The Faradaic efficiency of HCOOH could be as high as 94.1% with a current density of 28.4 mA cm-2 in ionic liquid-MeCN system. The reaction mechanism was proposed on the basis of some control experiments. This work opens a new way to prepare composite electrode for electrochemical reduction of CO_2.

关键词： CO2 reduction electrocatalyst ionic liquid porous carbon green chemistry

大黄合剂联合门冬氨酸鸟氨酸治疗早期肝性脑病疗效及对血氨和内毒素的影响

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现代中西医结合杂志 2017年第10期26卷 1033-1036页

作者：杨从意胡敬宝鲁艳平刘茜茜刘红旋广东省深圳市宝安区中医院广东深圳518101

目的探讨大黄合剂联合门冬氨酸鸟氨酸治疗早期肝性脑病的疗效及对血氨、内毒素(LPS)水平的影响。方法将166例早期肝性脑病患者随机分为2组,2组均给予常规治疗,对照组83例同时予以门冬氨酸鸟氨酸注射液静滴,研究组83例在对照组治疗基础... 详细信息

目的探讨大黄合剂联合门冬氨酸鸟氨酸治疗早期肝性脑病的疗效及对血氨、内毒素(LPS)水平的影响。方法将166例早期肝性脑病患者随机分为2组,2组均给予常规治疗,对照组83例同时予以门冬氨酸鸟氨酸注射液静滴,研究组83例在对照组治疗基础上予以大黄合剂保留灌肠,2组均治疗10 d。检测2组治疗前后肝功能指标[丙氨酸氨基转移酶(ALT)、天门冬氨酸氨基转移酶(AST)、总胆红素(TBil)]、血氨、血清LPS、炎症因子[肿瘤坏死因子-α(TNF-α)、白细胞介素-18(IL-18)、白细胞介素-6(IL-6)]和神经损伤相关指标[血清β-内啡肽(β-EP)、S100β、神经元特异性烯醇化酶(NSE)]水平,统计2组神志清醒时间、认知功能评分及临床疗效。结果治疗后2组血清ALT、AST、TBil、血氨、LPS、TNF-α、IL-18、IL-6、β-EP、S100β、NSE水平均明显降低(P均<0.05),且研究组各指标水平均明显低于对照组(P均<0.05);研究组治疗后神志清醒时间明显短于对照组(P<0.05),MMSE评分、HDS-R评分和治疗总有效率均明显高于对照组(P均<0.05)。结论大黄合剂联合门冬氨酸鸟氨酸治疗早期肝性脑病患者能够有效改善肝功能,降低血氨、LPS水平,减轻炎症反应及神经损伤,缩短患者神志清醒时间,提高认知功能,临床疗效确切。

关键词：肝性脑病大黄舍剂门冬氨酸鸟氨酸血氨内毒素

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抽蓄机组高强钢板焊接接头的断裂韧性研究

上海大中型电机 2021年第4期 34-38页

作者：贾朋刚卢从义霍岩文道维刘玉鑫哈尔滨电机厂有限责任公司黑龙江哈尔滨150040 哈尔滨电气集团有限公司黑龙江哈尔滨150028

测试了抽蓄机组高强钢板S500Q焊接接头与B780CF焊接接头在退火热处理后的断裂韧性J_(0)值和δ_(0)值。结果表明:S500Q焊接接头母材位置的断裂韧性最低,B780CF焊接接头焊缝位置的断裂韧性最低。强度较高的B780CF焊接接头的断裂韧性整体... 详细信息

测试了抽蓄机组高强钢板S500Q焊接接头与B780CF焊接接头在退火热处理后的断裂韧性J_(0)值和δ_(0)值。结果表明:S500Q焊接接头母材位置的断裂韧性最低,B780CF焊接接头焊缝位置的断裂韧性最低。强度较高的B780CF焊接接头的断裂韧性整体好于强度较低的S500Q焊接接头。本研究为抽蓄机组高强钢板焊接部件的缺陷断裂力学分析与寿命计算提供了重要依据。

关键词：抽蓄机组焊接接头断裂韧性

Nanocarrier-mediated siRNA delivery:a new approach for the treatment of traumatic brain injury-related Alzheimer's disease

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Neural Regeneration Research 2025年第9期20卷 2538-2555页

作者： Jie Jin Huajing Zhang Qianying lu Linqiang Tian Sanqiao Yao Feng Lai Yangfan Liang Chuanchuan Liu Yujia lu Sijia Tian Yanmei Zhao Wenjie Ren Institute of Disaster and Emergency Medicine Tianjin UniversityTianjinChina Key Laboratory for Disaster Medicine Technology TianjinChina Henan Medical Key Laboratory for Research of Trauma and Orthopedics The Third Affiliated Hospital of Xinxiang Medical UniversityXinxiangHenan ProvinceChina Clinical Medical Center of Tissue Engineering and Regeneration Xinxiang Medical UniversityXinxiangHenan ProvinceChina Institutes of Health Central Plain Xinxiang Medical UniversityXinxiangHenan ProvinceChina School of Public Health Xinxiang Medical UniversityXinxiangHenan ProvinceChina

Traumatic brain injury and Alzheimer's disease share pathological similarities,including neuronal loss,amyloid-βdeposition,tau hyperphosphorylation,blood-brain barrier dysfunction,neuroinflammation,and cognitive ***,traumatic brain injury can exacerbate Alzheimer's disease-like pathologies,potentially leading to the development of Alzheimer's *** offer a potential solution by facilitating the delive ry of small interfering RNAs across the blood-brain barrier for the targeted silencing of key pathological genes implicated in traumatic brain injury and Alzheimer's disease.U nlike traditional approaches to neuro regeneration,this is a molecula r-targeted strategy,thus avoiding non-specific drug *** review focuses on the use of nanocarrier systems for the efficient and precise delive ry of siRNAs,discussing the advantages,challenges,and future *** principle,siRNAs have the potential to target all genes and non-targetable protein s,holding significant promise for treating various *** the various therapeutic approaches currently available for neurological diseases,siRNA gene silencing can precisely"turn off"the expression of any gene at the genetic level,thus radically inhibiting disease progression;however,a significant challenge lies in delivering siRNAs across the blood-brain *** have received increasing attention as an innovative drug delive ry tool fo r the treatment of brain *** are considered a potential therapeutic strategy with the advantages of being able to cross the blood-brain barrier,targeted drug delivery,enhanced drug stability,and multifunctional *** use of nanoparticles to deliver specific modified siRNAs to the injured brain is gradually being recognized as a feasible and effective *** this strategy is still in the preclinical exploration stage,it is expected to achieve clinical translation in the future,creating a new field of molecular tar

关键词： blood-brain barrier cognitive dysfunction exosomes gene silencing immunotherapy inorganic nanomaterials liposome nanoparticles neuroinflammation polymer nanoparticles stem cells

Storage time affects the level and diagnostic efficacy of plasma biomarkers for neurodegenerative diseases

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Neural Regeneration Research 2025年第8期20卷 2373-2381页

作者： Lifang Zhao Mingkai Zhang Qimeng Li Xuemin Wang Jie lu Ying Han Yanning Cai Department of Clinical Biobank Xuanwu HospitalCapital Medical UniversityBeijingChina Beijing Geriatric Medical Research Center BeijingChina Department of Neurology Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Radiology and Nuclear Medicine Xuanwu HospitalCapital Medical UniversityBeijingChina Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics BeijingChina Key Laboratory of Neurodegenerative diseases Ministry of EducationBeijingChina School of Biomedical Engineering Hainan UniversityHaikouHainan ProvinceChina Center of Alzheimer’s Disease Beijing Institute for Brain DisordersBeijingChina National Clinical Research Center for Geriatric Diseases BeijingChina Institute of Biomedical Engineering Shenzhen Bay LaboratoryGaoke Innovation CenterShenzhenGuangdong ProvinceChina Department of Neurobiology Xuanwu HospitalCapital Medical UniversityBeijingChina

Several promising plasma biomarker proteins,such as amyloid-β(Aβ),tau,neurofilament light chain,and glial fibrillary acidic protein,are widely used for the diagnosis of neurodegenerative ***,little is known about the long-term stability of these biomarker proteins in plasma samples stored at-80°*** aimed to explore how storage time would affect the diagnostic accuracy of these biomarkers using a large *** samples from 229 cognitively unimpaired individuals,encompassing healthy controls and those experiencing subjective cognitive decline,as well as 99 patients with cognitive impairment,comprising those with mild cognitive impairment and dementia,were acquired from the Sino Longitudinal Study on Cognitive Decline *** samples were stored at-80°C for up to 6 years before being used in this *** results showed that plasma levels of Aβ42,Aβ40,neurofilament light chain,and glial fibrillary acidic protein were not significantly correlated with sample storage ***,the level of total tau showed a negative correlation with sample storage ***,in individuals without cognitive impairment,plasma levels of total protein and tau phosphorylated protein threonine 181(p-tau181)also showed a negative correlation with sample storage *** was not observed in individuals with cognitive ***,we speculate that the diagnostic accuracy of plasma p-tau181 and the p-tau181 to total tau ratio may be influenced by sample storage ***,caution is advised when using these plasma biomarkers for the identification of neurodegenerative diseases,such as Alzheimer's ***,in cohort studies,it is important to consider the impact of storage time on the overall results.

关键词： Alzheimer’s disease amyloid-β diagnostic ability glial fibrillary acidic protein neurodegeneration neurofilament light chain plasma biomarkers single molecule array storage time tau