检索结果-南通市图书馆

Early fire detection technology based on improved transformers in aircraft cargo compartments

Journal of Safety Science and Resilience 2024年第2期5卷 194-203页

作者： Hongzhou Ai Dong Han xinzhi wang Quanyi Liu Yue wang Mengyue Li Pei Zhu College of Civil Aviation Safety Engineering Civil Aviation Flight University of ChinaGuanghan618307China CivilAircraf Fire Science and Safety Enginring Key Laboratory of Sichuan CivilAviation Flight University of ChinaGuanghan 618307China School of Computer Engineering and Science Shanghai UniversityShanghai 200444China Key Laboratory of Civil Aviation Emergency Science&Technology Nanjing University of Aeronautics and AstronauticsNanjing 210000China

The implementation of early and accurate detection of aircraft cargo compartment fire is of great significance to ensure flight *** current airborne fire detection technology mostly relies on single-parameter smoke detection using infrared *** often results in a high false alarm rate in complex air transportation *** traditional deep learning model struggles to effectively address the issue of long-term dependency in multivariate fire *** paper proposes a multi-technology collaborative fire detection method based on an improved transformers ***-wavelength optical sensors,flue gas analyzers,and other equipment are used to carry out multi-technology collaborative detection methods and characterize various feature dimensions of fire to improve detection *** improved Transformer model which integrates the self-attention mechanism and position encoding mechanism is applied to the problem of long-time series modeling of fire information from a global perspective,which effectively solves the problem of gradient disappearance and gradient explosion in traditional RNN(recurrent neural network)and CNN(convolutional neural network).Two different multi-head self-attention mechanisms are used to classify and model multivariate fire information,respectively,which solves the problem of confusing time series modeling and classification modeling in dealing with multivariate classification tasks by a single attention ***,the output results of the two models are fused through the gate *** research results show that,compared with the traditional single-feature detection technology,the multi-technology collaborative fire detection method can better capture fire *** with the traditional deep learning model,the multivariate fire pre-diction model constructed by the improved Transformer can better detect fires,and the accuracy rate is 0.995.

关键词： Deep learning Aircraft cargo compartment Attentionmechanism Firedetection Multi-sourcedata fusion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

老年病人记忆能力相关的脑电非线性分析研究

引用

实用老年医学 2025年第1期39卷 61-65页

作者：尹鹏程王鑫智张林忠山西医科大学麻醉学院山西省太原市030001 山西医科大学第二医院麻醉科山西省太原市030001

目的探讨择期行全麻手术的老年病人术前与术后脑电非线性动力学参数变化规律,及其在记忆能力研究中的作用。方法选取全麻下行择期非心脏手术治疗的老年病人,随机分为有麻醉深度监测组(A组)和无麻醉深度监测组(N组)。采集2组病人手术前... 详细信息

目的探讨择期行全麻手术的老年病人术前与术后脑电非线性动力学参数变化规律,及其在记忆能力研究中的作用。方法选取全麻下行择期非心脏手术治疗的老年病人,随机分为有麻醉深度监测组(A组)和无麻醉深度监测组(N组)。采集2组病人手术前后休息状态和记忆任务状态下的脑电信号,对2组脑电非线性分析指数(关联维数和近似熵)进行比较分析。采用记忆与执行筛查量表(MES)对病人术前、术后的记忆能力进行测评和比较。结果术前2组病人休息状态、记忆任务状态下的关联维数和近似熵差异均无统计学意义(P>0.05);术后1 d,2组两种状态下的关联维数和近似熵均下降,但A组均高于N组,差异有统计学意义(P0.05)。术后1 d,2组病人MES评分均下降(P<0.05),但A组高于N组(P<0.05)。结论对于老年病人来说,全麻手术后可能出现脑电非线性分析指数结果下降和短期记忆能力下降,尤其是术中无麻醉深度监测的病人下降更明显。

关键词：记忆脑电图非线性分析老年人

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of Gastrodin on Early Brain Injury and Neurological Outcome After Subarachnoid Hemorrhage in Rats

引用

Neuroscience Bulletin 2019年第3期35卷 461-470页

作者： xinzhi wang Shuyue Li Jinbang Ma Chuangang wang Anzhong Chen Zhenxue Xin Jianjun Zhang Department of Neurosurgery The Second People's Hospital of LiaochengLinqing 252601China Department of Internal Medicine The Second People's Hospital of LiaochengLinqing 252601China Department of Rehabilitation Medicine The Second People's Hospital of LiaochengLinqing 252601China

Gastrodin is a phenolic glycoside that has been demonstrated to provide neuroprotection in preclinical models of central nervous system disease, but its effect in subarachnoid hemorrhage(SAH) remains unclear. In this study, we showed that intraperitoneal administration of gastrodin(100 mg/kg per day) significantly attenuated the SAH-induced neurological deficit, brain edema, and increased blood-brain barrier permeability in rats. Meanwhile, gastrodin treatment significantly reduced the SAHinduced elevation of glutamate concentration in the cerebrospinal fluid and the intracellular Ca2+ ***, gastrodin suppressed the SAH-induced microglial activation, astrocyte activation, and neuronal apoptosis. Mechanistically, gastrodin significantly reduced the oxidative stress and inflammatory response, up-regulated the expression of nuclear factor erythroid 2–related factor2, heme oxygenase-1, phospho-Akt and B-cell lymphoma2, and down-regulated the expression of BCL2-associated X protein and cleaved caspase-3. Our results suggested that the administration of gastrodin provides neuroprotection against early brain injury after experimental SAH.

关键词： Subarachnoid hemorrhage Gastrodin Early brain injury Neuroprotection Neuronal apoptosis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Public opinion analysis of novel coronavirus from online data

引用

Journal of Safety Science and Resilience 2020年第2期1卷 120-127页

作者： Lu Chen Yang Liu Yudong Chang xinzhi wang Xiangfeng Luo School of Computer Engineering and Science Shanghai UniversityShanghai 200444P R China

Novel coronavirus,now named COVID-19,has swept the world,which is regarded as‘public enemy number one’by *** these months,the coronavirus has become a hot topic and led various public *** traditional strategies for public opinion analyzing seldom take the entities and behaviors into *** on the high fluctuation of public opinion of novel coronavirus event,we propose a Key-Information-oriented Convolutional Neural Network(KIN-CNN)to analyze both relevant entities and behaviors in addition to public opinion trend on Chinese ***,we establish a knowledge set according to the characteristic of distribution in corpus of emotions,behaviors and ***,we integrate the other prior knowledge to initialize the convolution kernel for better model ***,as COVID-19 event develops,the dominant public opinion trend is obtained by our ***,the relationship of dominant public opinion with entities and behaviors is established as well in this research.

关键词： Public opinion Novel coronavirus Key-information-oriented convolutional neural network Entities and Behaviors

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Buffer and Wiresizing Optimization under the Distributed RLC Model with Crosstalk Constraint

引用

Wuhan University Journal of Natural Sciences 2007年第6期12卷 1051-1056页

作者： QI Chang wang Gaofeng SHI xinzhi Institute of Microelectronics and Information Technology Wuhan University Wuhan 430072 Hubei China

In this paper, we study the interconnect buffer and wiresizing optimization problem under a distributed RLC model to optimize not just area and delay, but also crosstalk for RLC circuit with non-monotone signal response. We present a new multiobjective genetic algorithm（MOGA） which uses a single objective sorting（SOS） method for constructing the non-dominated set to solve this multi-objective interconnect optimization problem. The MOGA/SOS optimal algorithm provides a smooth trade-off among signal delay, wave form, and routing area. Furthermore, we use a new method to calculate the lower bound of crosstalk. Extensive experimental results show that our algorithm is scalable with problem size. Furthermore, compared to the solution based on an Elmore delay model, our solution reduces the total routing area by up to 30%, the delay to the critical sinks by up to 25%, while further improving crosstalk up to 25.73% on average.

关键词： buffer insertion wiresizing optimization distributed RLC model crosstalk MOGA/SOS optimal algorithm

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Early smoke and flame detection based on transformer

引用

Journal of Safety Science and Resilience 2023年第3期4卷 294-304页

作者： xinzhi wang Mengyue Li Mingke Gao Quanyi Liu Zhennan Li Luyao Kou School of Computer Engineering and Science Shanghai UniversityShanghai 200444China The 32nd Research Institute of China Electronics Technology Group Corporation Shanghai 201808China College of Civil Aviation Safety Engineering Civil Aviation Flight University of ChinaGuanghan 618307China Department of Engineering Physics Tsinghua UniversityBeijing 100084China

Fire-detection technology plays a critical role in ensuring public safety and facilitating the development of smart *** fire detection is imperative to mitigate potential hazards and minimize associated ***,existing vision-based fire-detection methods exhibit limited generalizability and fail to adequately consider the effect of fire object size on detection *** address this issue,in this study a decoder-free fully transformer-based(DFFT)detector is used to achieve early smoke and flame detection,improving the detection performance for fires of different *** method effectively captures multi-level and multi-scale fire features with rich semantic information while using two powerful encoders to maintain the accuracy of the single-feature map ***,data augmentation is performed to enhance the generalizability of the ***,the detection-oriented transformer(DOT)backbone network is treated as a single-layer fire-feature extractor to obtain fire-related features on four scales,which are then fed into an encoder-only single-layer dense prediction ***,the prediction module aggregates the multi-scale fire features into a single feature map using a scale-aggregated encoder(SAE).The prediction module then aligns the classification and regression features using a task-aligned encoder(TAE)to ensure the semantic interaction of the classification and regression *** results on one private dataset and one public dataset demonstrate that the adopted DFFT possesses high detection accuracy and a strong generalizability for fires of different sizes,particularly early small *** DFFT achieved mean average precision(mAP)values of 87.40%and 81.12%for the two datasets,outperforming other baseline *** exhibits a better detection performance on flame objects than on smoke objects because of the prominence of flame features.

关键词： Early fire Smoke and flame detection Fire detection Vision transformer Public safety

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Thermal protection mechanism of heat pipe in leading edge under hypersonic conditions

引用

Chinese Journal of Aeronautics 2015年第1期28卷 121-132页

作者： Peng Wengen He Yurong wang xinzhi Zhu Jiaqi Han Jiecai School of Energy Science & Engineering Harbin Institute of Technology Center for Composite Materials Harbin Institute of Technology

Sharp local structure, like the leading edge of hypersonic aircraft, confronts a severe aerodynamic heating environment at a Mach number greater than 5. To eliminate the danger of a material failure, a semi-active thermal protection system is proposed by integrating a metallic heat pipe into the structure of the leading edge. An analytical heat-balance model is established from traditional aerodynamic theories, and then thermal and mechanical characteristics of the structure are studied at Mach number 6–8 for three refractory alloys, Inconel 625, C-103, and T-111. The feasibility of this simple analytical method as an initial design tool for hypersonic aircraft is assessed through numerical simulations using a finite element method. The results indicate that both the isothermal and the maximum temperatures fall but the von Mises stress increases with a longer design length of the leading edge. These two temperatures and the stress rise remarkably at a higher Mach number. Under all investigated hypersonic conditions, with a 3 mm leading edge radius and a0.15 m design length, the maximum stress exceeds the yield strength of Inconel 625 at Mach numbers greater than 6, which means a material failure. Moreover, both C-103 and T-111 meet all requirements at Mach number 6–8.

关键词： metallic heating aircraft length outer remarkably isothermal radius danger eliminate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multi-year assessment of paralytic shellfish toxins in hard clam species along the coastline of Jiangsu Province, China

引用

Acta Oceanologica Sinica 2019年第2期38卷 24-33页

作者： xinzhi wang Hao Wu Ying Cheng Hongmei Wen Rui Liu Libao wang Chenxiao Shan Chuan Chai School of Pharmacy Nanjing University of Chinese Medicines Marine Drug Research and Development Center of Jiangsu Province Marine Fisheries Research Institute of Jiangsu

Paralytic shellfish toxins(PSTs) are notorious neurotoxins that threaten public health and food safety *** PST monitoring programs have recently been established throughout China, the profiles and variation of PSTs in important commercial clams(e.g., Mactra veneriformis, Ruditapes philippinarum, and Meretrix meretrix) along the Jiangsu Province coastline remain largely unexplored. In this study, a validated hydrophilic interaction liquid chromatography–tandem mass spectrometry(HILIC-MS/MS) method was used to examine PST profiles and levels in 540 clam samples from natural production areas along Jiangsu Province coastline during2014–2016. Although the PST levels(≤6.38 μg saxitotoxin equivalents(eq)/kg) were consistently below European Union regulatory limits(≤800 μg saxitotoxin eq/kg) during this time period, saxitotoxin, decarbamoylsaxitotoxin,and gonyautoxins 1 and 4 were detected, and nearly 40% of the samples were saxitotoxin-positive. The PST levels also varied significantly by seasons, with peak values observed in May during 2014–2016. This is the first systematic report of PSTs in clams from Jiangsu Province, and additional research and protective measures are needed to ensure the safety of clams harvested in this area.

关键词： paralytic shellfish toxin HILIC-MS/MS clam seasonal variation Jiangsu Province

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Heliangin acts as a covalent ligand of RPS2 that disrupts pre-rRNA metabolic processes in NPM1-mutated acute myeloid leukemia

引用

Acta Pharmaceutica Sinica B 2023年第2期13卷 598-617页

作者： Yin Feng Yefan Han Anni Hu Yi Qu Yili Hu Hao Wu xinzhi wang Li He College of Pharmacy Nanjing University of Chinese MedicineNanjing 210046China China Jiangsu Key Laboratory of Research and Development in Marine Bio-resource Pharmaceutics Nanjing 210046China Experiment Center for Science and Technology Nanjing University of Chinese MedicineNanjing 210046China Department of Hematology Zhongnan Hospital of Wuhan UniversityWuhan 430071China

Although NPM1 mutations are frequently found in acute myeloid leukemia patients,therapeutic strategies are scarce and unsuitable for those who cannot tolerate intensive *** we demonstrated that heliangin,a natural sesquiterpene lactone,exerts favorable therapeutic responses in NPM1 mutant acute myeloid leukemia cells,with no apparent toxicity to normal hematogenous cells,by inhibiting their proliferation,inducing apoptosis,causing cell cycle arrest,and promoting ***-depth studies on its mode of action using quantitative thiol reactivity platform screening and subsequent molecular biology validation showed that the ribosomal protein S2(RPS2)is the main target of heliangin in treating NPM1 mutant *** covalent binding to the C222 site of RPS2,the electrophilic moieties of heliangin disrupt pre-rRNA metabolic processes,leading to nucleolar stress,which in turn regulates the ribosomal proteins-MDM2-p53 pathway and stabilizes *** data shows that the pre-rRNA metabolic pathway is dysregulated in acute myeloid leukemia patients with the NPM1 mutation,leading to a poor *** found that RPS2 plays a critical role in regulating this pathway and may be a novel treatment *** findings suggest a novel treatment strategy and lead compound for acute myeloid leukemia patients,especially those with NPM1 mutations.

关键词： Acute myeloid leukemia Heliangin NPM1-mutation Differentiation Pre-rRNA Covalent RPS2 p53 stabilization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Entity and relation extraction with rule-guided dictionary as domain knowledge

引用

Frontiers of Engineering Management 2022年第4期9卷 610-622页

作者： xinzhi wang Jiahao LI Ze ZHENG Yudong CHANG Min ZHU School of Computer Engineering and Science Shanghai UniversityShanghai 200444China Baidu(China)Co. Ltd.Beijing 100085China The Sixth Medical Center of PLA General Hospital Beijing 100048China

Entity and relation extraction is an indispensable part of domain knowledge graph construction,which can serve relevant knowledge needs in a specific domain,such as providing support for product research,sales,risk control,and domain hotspot *** existing entity and relation extraction methods that depend on pretrained models have shown promising performance on open ***,the performance of these methods degrades when they face domain-specific *** extraction models treat characters as basic semantic units while ignoring known character dependency in specific *** extraction is based on the hypothesis that the relations hidden in sentences are unified,thereby neglecting that relations may be diverse in different entity *** address the problems above,this paper first introduced prior knowledge composed of domain dictionaries to enhance characters’***,domain rules were built to eliminate noise in entity relations and promote potential entity relation ***,experiments were designed to verify the effectiveness of our proposed *** results on two domains,including laser industry and unmanned ship,showed the superiority of our *** F1 value on laser industry entity,unmanned ship entity,laser industry relation,and unmanned ship relation datasets is improved by+1%,+6%,+2%,and+1%,*** addition,the extraction accuracy of entity relation triplet reaches 83%and 76%on laser industry entity pair and unmanned ship entity pair datasets,respectively.

关键词： entity extraction relation extraction prior knowledge domain rule

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：