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两类农村居民点整治模式下农户整治意愿影响因素比较研究

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中国土地科学 2013年第9期27卷 85-91页

作者：张正峰吴沅箐杨红中国人民大学公共管理学院北京100872 上海市城市规划设计研究院上海200040 国土资源部土地整治中心北京100035

研究目的:比较在宅基地置换和村庄归并两类农村居民点整治模式下农户整治意愿影响因素的异同,为制定差别化的农村居民点整治政策提供支持。研究方法:比较分析法,农户调查法,Logistic回归分析法。研究结果:宅基地置换模式下,年龄、人口... 详细信息

研究目的:比较在宅基地置换和村庄归并两类农村居民点整治模式下农户整治意愿影响因素的异同,为制定差别化的农村居民点整治政策提供支持。研究方法:比较分析法,农户调查法,Logistic回归分析法。研究结果:宅基地置换模式下,年龄、人口数、房屋建筑年代、喜好房屋类型、政策认知状况以及对生活成本的接受程度是显著影响农户整治意愿的因素;村庄归并模式下,农业收入占比、宅基地面积、生态环境满意度、补偿方式和对生活成本的接受程度是显著影响农户整治意愿的因素;两类模式下,除对生活成本的接受程度是共同显著影响因素外,其他影响因素存在着较大的差别。研究结论:不同区域、不同经济发展水平下,不同农户的居民点整治意愿影响因素存在差异,新时期农村居民点整治的政策应着眼于各区域的客观实际,分区、分类推进,体现出差别化。

关键词：土地整治宅基地置换村庄归并整治模式 Logistic模型农户意愿

基于彼得斯治理理论的京津冀协同发展路径重构

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资源开发与市场 2022年第1期38卷 69-77页

作者：徐泽张正峰李储中国人民大学公共管理学院北京100872

基于彼得斯治理理论,分析了京津冀地区的协同发展现状和要求,重构了其协同发展路径。结果表明:①要素禀赋、区域政策分别是区域协同发展的客观基础和主观条件。②区域协调发展新机制为京津冀地区提出了“坚持以北京和天津尤其是以非首... 详细信息

基于彼得斯治理理论,分析了京津冀地区的协同发展现状和要求,重构了其协同发展路径。结果表明:①要素禀赋、区域政策分别是区域协同发展的客观基础和主观条件。②区域协调发展新机制为京津冀地区提出了“坚持以北京和天津尤其是以非首都功能疏解为引领,借助市场力量调动各个主体的积极性,同时注重协同方式(机制)建设”的新要求。③京津冀协同发展路径重构可从“由软硬兼施的市场(市场平台和政府效能)、三维协同的主体(地方政府,中央政府和非政府部门)和富有弹性的方式(临时机构和互动机制)”的“3M”策略入手。

关键词：公共管理学政府治理区域协调发展生产要素京津冀

基于预训练CNN模型深度特征融合的苹果叶片病害检测

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安徽农业科学 2024年第23期52卷 216-219页

作者：张正风高峰徐州生物工程职业技术学院江苏徐州221006

探讨了采用预训练的卷积神经网络(CNN)模型,如GoogLeNet、VGGNet和EfficientNet,作为特征提取器对苹果叶片病害检测准确率的影响。通过结合这3个CNN模型导出的深度特征,实现了深度学习特征的组合,使用提取的深度特征训练了支持向量机(S... 详细信息

探讨了采用预训练的卷积神经网络(CNN)模型,如GoogLeNet、VGGNet和EfficientNet,作为特征提取器对苹果叶片病害检测准确率的影响。通过结合这3个CNN模型导出的深度特征,实现了深度学习特征的组合,使用提取的深度特征训练了支持向量机(SVM)分类器。结果表明,所有CNN模型都能以显著的准确率使用深度特征提取并检测出苹果叶片病害,整体分类准确率达到了99.42%。此外,该研究还提出了一种基于改进深度学习的方法,通过结合3个CNN模型的深度特征,进一步提高了预测性能。该方法在苹果叶片病害检测中表现出色,并有望应用于其他植物叶片的病害检测。该研究为植物病害的自动识别提供了一种有效的方法,有助于农业生产的智能化和精准化。

关键词：苹果叶片病害卷积神经网络深度特征提取支持向量机病害检测

维普期刊数据库博看期刊

从委托代理关系评析国企经理人的激励与约束机制

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特区经济 2006年第1期 190-191页

作者：刘军霞张正峰暨南大学管理学院广东广州510632 深圳大学管理学院广东深圳518060

我国国有企业经理人的激励和约束机制问题是导致国有企业效率低下的重要原因之一。针对该问题,本文从国有企业的委托代理关系链的角度进行分析,从4个方面深入剖析该关系链,探讨了该机制存在的问题。即我国国有企业具有中国特色的委托代... 详细信息

我国国有企业经理人的激励和约束机制问题是导致国有企业效率低下的重要原因之一。针对该问题,本文从国有企业的委托代理关系链的角度进行分析,从4个方面深入剖析该关系链,探讨了该机制存在的问题。即我国国有企业具有中国特色的委托代理关系链,并对如何完善该代理关系和解决机制失灵的问题提出了相应的建议和对策。

关键词：委托代理委托人缺失显性收入隐性收入

Exercise preconditioning alleviates ischemia-induced memory deficits by increasing circulating adiponectin

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Neural Regeneration Research 2025年第5期20卷 1445-1454页

作者： Meifeng zheng Borui zhang Sonata S Y Yau Kwok-Fai So Li zhang Haining Ou Department of Rehabilitation Medicine Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Medicine The Fifth Clinical College of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Key Laboratory of CNS Regeneration(Ministry of Education) Guangdong-Hong Kong-Macao Institute of CNS RegenerationJinan UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Sciences The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina State Key Laboratory of Brain and Cognitive Science Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina Center for Exercise and Brain Science School of PsychologyShanghai University of SportShanghaiChina Neuroscience and Neurorehabilitation Institute University of Health and Rehabilitation SciencesQingdaoShandong ProvinceChina

Cerebral ischemia is a major health risk that requires preventive approaches in addition to drug *** exercise enhances neurogenesis and synaptogenesis,and has been widely used for functional rehabilitation after *** this study,we determined whether exercise training before disease onset can alleviate the severity of cerebral *** also examined the role of exercise-induced circulating factors in these *** mice were subjected to 14 days of treadmill exercise training before surgery for middle cerebral artery *** found that this exercise pre-conditioning strategy effectively attenuated brain infarct area,inhibited gliogenesis,protected synaptic proteins,and improved novel object and spatial memory *** analysis showed that circulating adiponectin plays a critical role in these preventive effects of *** activation of adiponectin receptors by Adipo Ron mimicked the effects of exercise,while inhibiting receptor activation abolished the exercise *** summary,our results suggest a crucial role of circulating adiponectin in the effects of exercise pre-conditioning in protecting against cerebral ischemia and supporting the health benefits of exercise.

关键词： adiponectin cerebral ischemia exercise pre-conditioning hippocampus memory function middle cerebral artery occlusion prefrontal cortex synaptic proteins treadmill exercise

Hypoxia-preconditioned bone marrow-derived mesenchymal stem cells protect neurons from cardiac arrest-induced pyroptosis

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Neural Regeneration Research 2025年第4期20卷 1103-1123页

作者： Xiahong Tang Nan zheng Qingming Lin Yan You zheng Gong Yangping Zhuang Jiali Wu Yu Wang Hanlin Huang Jun Ke feng Chen Shengli Clinical Medical College of Fujian Medical University Fujian Medical UniversityFuzhouFujian ProvinceChina Department of Emergency Fujian Provincial HospitalFuzhouFujian ProvinceChina Fujian Provincial Key Laboratory of Emergency Medicine FuzhouFujian ProvinceChina The Second Department of Intensive Care Unit Fujian Provincial Hospital South BranchFuzhouFujian ProvinceChina

Cardiac arrest can lead to severe neurological impairment as a result of inflammation,mitochondrial dysfunction,and post-cardiopulmonary resuscitation neurological *** preconditioning has been shown to improve migration and survival of bone marrow–derived mesenchymal stem cells and reduce pyroptosis after cardiac arrest,but the specific mechanisms by which hypoxia-preconditioned bone marrow–derived mesenchymal stem cells protect against brain injury after cardiac arrest are *** this end,we established an in vitro co-culture model of bone marrow–derived mesenchymal stem cells and oxygen–glucose deprived primary neurons and found that hypoxic preconditioning enhanced the protective effect of bone marrow stromal stem cells against neuronal pyroptosis,possibly through inhibition of the MAPK and nuclear factor κB ***,we transplanted hypoxia-preconditioned bone marrow–derived mesenchymal stem cells into the lateral ventricle after the return of spontaneous circulation in an 8-minute cardiac arrest rat model induced by *** results showed that hypoxia-preconditioned bone marrow–derived mesenchymal stem cells significantly reduced cardiac arrest–induced neuronal pyroptosis,oxidative stress,and mitochondrial damage,whereas knockdown of the liver isoform of phosphofructokinase in bone marrow–derived mesenchymal stem cells inhibited these *** conclude,hypoxia-preconditioned bone marrow–derived mesenchymal stem cells offer a promising therapeutic approach for neuronal injury following cardiac arrest,and their beneficial effects are potentially associated with increased expression of the liver isoform of phosphofructokinase following hypoxic preconditioning.

关键词： bone marrow–derived mesenchymal stem cells cardiac arrest cardiac resuscitation hypoxic preconditioning liver isoform of phosphofructokinase mitochondria neuroinflammation oxidative stress pyroptosis reactive oxygen species

Copper homeostasis and neurodegenerative diseases

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Neural Regeneration Research 2025年第11期20卷 3124-3143页

作者： Yuanyuan Wang Daidi Li Kaifei Xu Guoqing Wang feng zhang International Research Laboratory of Ethnomedicine of Ministry of Education Key Laboratory of Basic Pharmacology of Ministry of EducationLaboratory Animal Center and Key Laboratory of Basic Pharmacology of Guizhou ProvinceZunyi Medical UniversityZunyiGuizhou ProvinceChina

Copper,one of the most prolific transition metals in the body,is required for normal brain physiological activity and allows various functions to work normally through its range of *** homeostasis is meticulously maintained through a complex network of copper-dependent proteins,including copper transporters(CTR1 and CTR2),the two copper ion transporters the Cu-transporting ATPase 1(ATP7A)and Cu-transporting beta(ATP7B),and the three copper chaperones ATOX1,CCS,and *** in copper homeostasis can lead to either the deficiency or accumulation of copper in brain *** evidence suggests that abnormal copper metabolism or copper binding to various proteins,including ceruloplasmin and metallothionein,is involved in the pathogenesis of neurodegenerative ***,the exact mechanisms underlying these processes are not *** is a potent oxidant that increases reactive oxygen species production and promotes oxidative *** reactive oxygen species levels may further compromise mitochondrial integrity and cause mitochondrial *** oxygen species serve as key signaling molecules in copper-induced neuroinflammation,with elevated levels activating several critical inflammatory ***,copper can bind aberrantly to several neuronal proteins,including alphasynuclein,tau,superoxide dismutase 1,and huntingtin,thereby inducing neurotoxicity and ultimately cell *** study focuses on the latest literature evaluating the role of copper in neurodegenerative diseases,with a particular focus on copper-containing metalloenzymes and copper-binding proteins in the regulation of copper homeostasis and their involvement in neurodegenerative disease *** synthesizing the current findings on the functions of copper in oxidative stress,neuroinflammation,mitochondrial dysfunction,and protein misfolding,we aim to elucidate the mechanisms by which copper contributes to a wide range of heredit

关键词： Alzheimer's disease amyotrophic lateral sclerosis disease copper homeostasis copper toxicity Huntington's disease Menkes'disease multiple sclerosis neurodegenerative disease Parkinson's disease Wilson's disease

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全国城镇土地等别调整更新研究

中国土地科学 2009年第10期23卷 36-40页

作者：张正峰杨红赵文武中国人民大学土地管理系北京100872 国土资源部土地整理中心北京100035 北京师范大学资源学院北京100875

研究目的:选择城镇土地等别调整评价指标体系,以中国行政区划确定的县级行政单元作为基本单元,对其城镇土地等别进行调整更新。研究方法:多因素综合评价法,特尔菲法和GIS分析方法。研究结果:全国2863个单元调整后的城镇土地等别位于1—1... 详细信息

研究目的:选择城镇土地等别调整评价指标体系,以中国行政区划确定的县级行政单元作为基本单元,对其城镇土地等别进行调整更新。研究方法:多因素综合评价法,特尔菲法和GIS分析方法。研究结果:全国2863个单元调整后的城镇土地等别位于1—15等,与原等别相比,调整后等别发生变化的单元数目为302个。研究结论:以全国287个地级以上城市主城区为基准点,分层次开展全国城镇土地等别调整的方法科学可行。

关键词：城镇土地等别指标体系调整更新

Wi-Fi AdHoc与4G通信在无线地震数据采集站中的应用

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地球物理学进展 2015年第5期30卷 2337-2341页

作者：张正峰陈炳贵刘宁中国科学院地质与地球物理研究所北京100029 南昌工程学院南昌330099 北京中科联衡科技有限公司北京100029

针对野外地震勘探施工环境复杂,对无线地震仪数据传输与监控的可靠性要求比较高,在介绍Wi-Fi AdHoc无线通信模式的技术特点和组网原理以及4G通信网络结构与特点的基础上,结合Wi-Fi AdHoc技术的组网方便灵活、低成本、数据传输率高和4G... 详细信息

针对野外地震勘探施工环境复杂,对无线地震仪数据传输与监控的可靠性要求比较高,在介绍Wi-Fi AdHoc无线通信模式的技术特点和组网原理以及4G通信网络结构与特点的基础上,结合Wi-Fi AdHoc技术的组网方便灵活、低成本、数据传输率高和4G网络设施强大、通信稳定可靠等诸多优点,设计出Wi-Fi模块与4G通信模块相结合的低功耗无线监测传输方案,通过4G网络定位监测技术,提高了无线地震仪野外施工效率,使无线地震仪野外施工更具可行性和实用性.

关键词：无线网络 Wi-Fi AdHoc 4G通信无线地震仪监测