检索结果-南通市图书馆

复合高斯杂波中距离扩展目标的迭代近似GLRT检测器

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

航空学报 2013年第5期34卷 1140-1150页

作者：顾新锋简涛何友郝晓琳海军航空工程学院信息融合技术研究所山东烟台264001 烟台电力经济技术研究所山东烟台264001

研究了结构化的复合高斯杂波(CGC)背景中距离扩展目标自适应检测问题。针对异质杂波背景中的近似广义似然比检验(AGLRT-HTG)检测器应用于CGC背景中时存在一定的信杂比损失问题,结构化的复合高斯杂波采用自回归过程建模,结合近似广义似... 详细信息

研究了结构化的复合高斯杂波(CGC)背景中距离扩展目标自适应检测问题。针对异质杂波背景中的近似广义似然比检验(AGLRT-HTG)检测器应用于CGC背景中时存在一定的信杂比损失问题,结构化的复合高斯杂波采用自回归过程建模,结合近似广义似然比检验(AGLRT)方法和迭代估计思想,提出了CGC背景中距离扩展目标的迭代近似广义似然比检测器(RAGLRT-CGC)。从理论上分析了极限情况下RAGLRT-CGC虚警概率与检测门限关系的解析表达式。仿真结果表明,在CGC背景中,RAGLRT-CGC对不同多主散射点目标具有较好的鲁棒性,并且检测性能明显优于AGLRT-HTG。

关键词：雷达杂波复合高斯杂波距离扩展目标检测自回归广义似然比检验

非高斯杂波背景中距离扩展目标的盲积累检测器

在线全文

学校读者我要写书评

暂无评论

航空学报 2012年第12期33卷 2261-2267页

作者：顾新锋简涛何友郝晓琳海军航空工程学院信息融合技术研究所山东烟台264001 烟台电力经济技术研究所山东烟台264001

在采用球不变随机向量(SIRV)建模的非高斯杂波背景下,研究了导向矢量失配或未知时距离扩展目标的检测问题。先假设导向矢量已知,采用广义似然比检验(GLRT)得到每个距离单元的归一化匹配滤波器(NMF)统计量,再将多个距离单元的统计量进行... 详细信息

在采用球不变随机向量(SIRV)建模的非高斯杂波背景下,研究了导向矢量失配或未知时距离扩展目标的检测问题。先假设导向矢量已知,采用广义似然比检验(GLRT)得到每个距离单元的归一化匹配滤波器(NMF)统计量,再将多个距离单元的统计量进行非相干积累得到扩展目标的NMF积累检测器(NMFI),然后通过最大化检测统计量的方法,结合特征值分解技术,对导向矢量进行估计,提出了距离扩展目标的盲NMFI(B-NMFI)。仿真分析表明:当导向矢量失配时,NMFI的检测性能优于GLRT;当导向矢量未知时,B-NMFI能有效地检测目标,并且对不同方位的目标具有很好的鲁棒性。

关键词：非高斯杂波距离扩展目标广义似然比检验检测最大似然估计

镧改性生物炭在砂柱中单独运移及与Cr(Ⅵ)共运移

在线全文

学校读者我要写书评

暂无评论

农业环境科学学报 2023年第2期42卷 352-361页

作者：顾鑫锋潘慧张连毅丁竹红南京工业大学环境科学与工程学院南京211816

为探究稀土金属改性生物炭在土壤-地下水中的运移行为,本研究选择常见稀土元素镧制备改性生物炭,并经球磨后制成镧改性生物炭细颗粒(La-BC),采用柱实验分别从流速、pH、离子强度和腐植酸浓度4个方面来研究La-BC单独运移和与Cr(Ⅵ)共运... 详细信息

为探究稀土金属改性生物炭在土壤-地下水中的运移行为,本研究选择常见稀土元素镧制备改性生物炭,并经球磨后制成镧改性生物炭细颗粒(La-BC),采用柱实验分别从流速、pH、离子强度和腐植酸浓度4个方面来研究La-BC单独运移和与Cr(Ⅵ)共运移时其在饱和均质石英砂介质中的运移和滞留规律。研究表明:流速从1.0 mL·min^(-1)增至1.5 mL·min^(-1)时,单独运移实验出流液中La-BC的质量回收率由58.0%增至73.4%,共运移实验出流液中La-BC的质量回收率为78.7%~80.1%。pH从5升至7时,La-BC单独运移及共运移时的穿透曲线的相对浓度(Ct/C0)峰值分别从0.66增至0.93和从0.80增至0.85。离子强度增至5 mmol·L^(-1)时,La-BC单独运移时的Ct/C0峰值降低至0.05,与Cr(Ⅵ)共运移时La-BC的穿透峰值为0.81~0.75。腐植酸浓度由0增至10 mg·L^(-1)时,La-BC单独运移及与Cr(Ⅵ)共运移时出水中La-BC质量回收率分别减少了约13个和3个百分点。相较于La-BC单独运移,共运移中Cr(Ⅵ)的存在除了在中性实验条件下抑制La-BC运移能力外,其余实验条件下皆促进了La-BC在饱和介质中的运移。因此,较低的流速、较低的pH环境、一定的离子强度及腐植酸浓度有助于改性生物炭的滞留稳定。

关键词：镧改性生物炭 Cr(Ⅵ) 石英砂介质共迁移滞留土壤地下水

维普期刊数据库博看期刊

Pathogenesis, diagnosis, and treatment of epilepsy: electromagnetic stimulation-mediated neuromodulation therapy and new technologies

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第4期20卷 917-935页

作者： Dian Jiao Lai Xu Zhen gu Hua Yan Dingding Shen Xiaosong gu Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjinChina Key Laboratory of Advanced Drug Delivery Systems of Zhejiang Province College of Pharmaceutical SciencesZhejiang UniversityHangzhouZhejiang ProvinceChina Affiliated Hospital of Nantong University NantongJiangsu ProvinceChina

Epilepsy is a severe,relapsing,and multifactorial neurological *** regarding the accurate diagnosis,prognosis,and in-depth pathogenesis are crucial for the precise and effective treatment of *** pathogenesis of epilepsy is complex and involves alterations in variables such as gene expression,protein expression,ion channel activity,energy metabolites,and gut microbiota *** results are lacking for conventional treatments for *** resection of lesions,drug therapy,and non-drug interventions are mainly used in clinical practice to treat pain associated with ***-pharmacological treatments,such as a ketogenic diet,gene therapy for nerve regeneration,and neural regulation,are currently areas of research *** review provides a comprehensive overview of the pathogenesis,diagnostic methods,and treatments of *** also elaborates on the theoretical basis,treatment modes,and effects of invasive nerve stimulation in neurotherapy,including percutaneous vagus nerve stimulation,deep brain electrical stimulation,repetitive nerve electrical stimulation,in addition to non-invasive transcranial magnetic stimulation and transcranial direct current *** studies have shown that electromagnetic stimulation-mediated neuromodulation therapy can markedly improve neurological function and reduce the frequency of epileptic ***,many new technologies for the diagnosis and treatment of epilepsy are being ***,current research is mainly focused on analyzing patients’clinical manifestations and exploring relevant diagnostic and treatment methods to study the pathogenesis at a molecular level,which has led to a lack of consensus regarding the mechanisms related to the disease.

关键词： diagnosis drug treatment electroencephalography epilepsy monitoring epilepsy nerve regeneration neurostimulation non-drug interventions pathogenesis prediction

在线全文

学校读者我要写书评

暂无评论

基于AR模型的距离扩展目标自适应检测器

太赫兹科学与电子信息学报 2019年第1期17卷 124-130页

作者：顾新锋严树强徐正峰中国卫星海上测控部江苏江阴214431

针对非高斯杂波背景中扩展目标的检测问题,将自回归(AR)模型与广义杂波分组模型相结合,提出了基于AR的广义杂波分组模型。并在该杂波模型背景下,利用近似广义似然比检测(AGLRT)原理,结合迭代估计方法,提出了广义杂波背景下迭代近似广义... 详细信息

针对非高斯杂波背景中扩展目标的检测问题,将自回归(AR)模型与广义杂波分组模型相结合,提出了基于AR的广义杂波分组模型。并在该杂波模型背景下,利用近似广义似然比检测(AGLRT)原理,结合迭代估计方法,提出了广义杂波背景下迭代近似广义似然比检测器(RAGLRT-GCC)。该检测器不需要利用辅助距离单元估计杂波协参数就可以实现目标的自适应检测。RAGLRT-GCC利用了杂波分组信息,有效提高了对稀疏扩展目标的检测性能。仿真结果表明,在相同检测概率下,RAGLRT-GCC性能优于现有的复合高斯杂波背景下迭代近似广义似然比检测器(RAGLRT-CG)。

关键词：复合高斯杂波球不变随机向量杂波分组广义似然比检验

The dopaminergic system and Alzheimer's disease

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第9期20卷 2495-2512页

作者： Yuhan Zhang Yuan Liang Yixue gu International Medical College Chongqing Medical UniversityChongqingChina College of Pharmacy Chongqing Medical UniversityChongqingChina Department of Neurology The First Affiliated Hospital of Chongqing Medical UniversityChongqing Key Laboratory of NeurologyChongqingChina

Alzheimer's disease is a common neurodegenerative disorder in older *** its prevalence,its pathogenesis remains unclea *** addition to the most widely accepted causes,which in clude excessive amyloid-beta aggregation,tau hyperphosphorylation,and deficiency of the neurotransmitter acetylcholine,numerous studies have shown that the dopaminergic system is also closely associated with the occurrence and development of this *** is a crucial catecholaminergic neurotransmitter in the human ***-associated treatments,such as drugs that target dopamine receptor D and dopamine analogs,can improve cognitive function and alleviate psychiatric symptoms as well as ameliorate other clinical *** r,therapeutics targeting the dopaminergic system are associated with various adverse reactions,such as addiction and exacerbation of cognitive *** review summarizes the role of the dopaminergic system in the pathology of Alzheimer's disease,focusing on currently available dopamine-based therapies for this disorder and the common side effects associated with dopamine-related *** aim of this review is to provide insights into the potential connections between the dopaminergic system and Alzheimer's disease,thus helping to clarify the mechanisms underlying the condition and exploring more effective therapeutic options.

关键词： adverse drug reaction Alzheimer's disease catecholamine dopamine receptor dopamine receptor heterodimers dopaminergic system neurodegenerative disease neurotransmitter signaling pathways traditional Chinese medicine treatment

Brain-derived neurotrophic factor plays with TRiC:focus on synaptic dysfunction in Huntington’s disease

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2919-2920页

作者： Yingli gu Kijung Sung Chengbiao Wu Department of Neurosciences University of California San DiegoLa JollaCAUSA

Brain-derived neurotrophic factor(BDNF)exerts pleiotropic effects on brain processes including psychiatric disorders,aging,neurodegeneration,and metabolic homeostasis.A simple PubMed search using the key word“BDNF,”to date,yields over 33,000 *** fundamental biology to potential therapeutic applications,BDNF has clearly garnered extensive and significant attention in the field of neurobiology research.

关键词： Huntington homeostasis therapeutic

在线全文

学校读者我要写书评

暂无评论

RUNX2研究进展

医学分子生物学杂志 2006年第1期3卷 52-54页

作者：顾新丰蒋垚上海交通大学附属第六人民医院骨科上海市200233

RUNX2是转录因子RUNXX家族成员之一,作为成骨细胞的特异转录因子,对骨组织的形成和重建起着重要作用。RUNX2决定着多能干细胞向成骨细胞分化,促进软骨细胞的成熟和软骨的血管化。另外,RUNX2与破骨细胞和细胞外基质的形成也有关。通过对R... 详细信息

RUNX2是转录因子RUNXX家族成员之一,作为成骨细胞的特异转录因子,对骨组织的形成和重建起着重要作用。RUNX2决定着多能干细胞向成骨细胞分化,促进软骨细胞的成熟和软骨的血管化。另外,RUNX2与破骨细胞和细胞外基质的形成也有关。通过对RUNX2基因表达调控及其诱导成骨细胞分化的分子机制的研究,已为骨代谢性疾病的治疗提供了新的思路。

关键词： RUNX2蛋白骨细胞基因表达调控

AI-Enhanced Secure Data Aggregation for Smart Grids with Privacy Preservation

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 799-816页

作者： Congcong Wang Chen Wang Wenying Zheng Wei gu School of Software Nanjing University of Information Science and TechnologyNanjing210044China School of Information Science and Engineering Zhejiang Sci-Tech UniversityHangzhou310018China State Key Laboratory of Public Big Data Guizhou UniversityGuiyang550025China School of Computer Science and Technology(School of Artificial Intelligence) Zhejiang Sci-Tech UniversityHangzhou310018China School of Computer Science(School of Cyber Science and Engineering) Nanjing University of Information Science and TechnologyNanjing210044China

As smart grid technology rapidly advances,the vast amount of user data collected by smart meter presents significant challenges in data security and privacy *** research emphasizes data security and user privacy concerns within smart ***,existing methods struggle with efficiency and security when processing large-scale *** efficient data processing with stringent privacy protection during data aggregation in smart grids remains an urgent *** paper proposes an AI-based multi-type data aggregation method designed to enhance aggregation efficiency and security by standardizing and normalizing various data *** approach optimizes data preprocessing,integrates Long Short-Term Memory(LSTM)networks for handling time-series data,and employs homomorphic encryption to safeguard user *** also explores the application of Boneh Lynn Shacham(BLS)signatures for user *** proposed scheme’s efficiency,security,and privacy protection capabilities are validated through rigorous security proofs and experimental analysis.

关键词： Smart grid data security privacy protection artificial intelligence data aggregation