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创新生态网络中知识生态关系及知识生态演进机制研究

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甘肃科技纵横 2024年第4期53卷 1-10页

作者：张民阔郭华向洪湖南外贸职业学院工商系湖南长沙410211 上海工程技术大学图书馆上海201620 湖南工业职业技术学院马克思主义学院湖南长沙410208

探讨创新生态网络中的知识生态关系及知识生态演进机制,可以为区域协同创新提供理论指导和决策参考。文章结合社会网络理论和生态系统理论,分析了创新生态网络的形成及演进过程,划分了创新生态网络中的知识生态种群,探讨了创新生态网络... 详细信息

探讨创新生态网络中的知识生态关系及知识生态演进机制,可以为区域协同创新提供理论指导和决策参考。文章结合社会网络理论和生态系统理论,分析了创新生态网络的形成及演进过程,划分了创新生态网络中的知识生态种群,探讨了创新生态网络中的知识生态关系及知识生态演进机制,提出了创新生态网络的知识治理机制。研究认为,创新生态网络中的知识获取种群、知识供给种群和知识服务种群之间的竞争与合作类似于复杂生态系统的捕食、被食与寄生等生态关系和生态演进机制,彼此之间的交互作用共同推动创新生态网络由低级向高级演进。

关键词：创新生态网络知识生态种群知识生态关系知识生态演进机制非对称性

维普期刊数据库博看期刊

Alteration of microbial properties and community structure in soils exposed to napropamide

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Journal of Environmental Sciences 2009年第4期21卷 494-502页

作者： guo hua CHEN guofeng LV Zhaoping ZHAO hua YANG Hong Department of Applied Chemistry College of Science Nanjing Agricultural University Nanjing 210095 China Guizhou Provincial Center for Diseases Prevention and Control Guizhou 550004 China

The effect of pesticide napropamide （N,N-diethyl-2-（1-naphthalenyloxy） propanamide） on soil microorganisms for long-term （56 d） was assessed by monitoring changes in soil microbial biological responses. Soils were treated with napropamide at 0, 2, 10, 20, 40, and 80 mg/kg soil and sampled at intervals of 1, 3, 7, 14, 28, 42, and 56 d. The average microbial biomass C declined in napropamide-treated soils as compared to control. The same trend was observed on microbial biomass N after napropamide application. We also determined the basal soil respiration （BSR） and observed a high level in soils treated with napropamide during the first 7 d of experiment. But with the passage of incubation time, BSR with napropamide decreased relatively to control. Application of napropamide at 2-80 mg/kg soil had inhibitory effects on the activity of urease and invertase. Activity of catalase was enhanced during the initial 7 d of napropamide application, but soon recovered to the basal level. The depressed enzyme activities might be due to the toxicity of napropamide to the soil microbial populations. To further understand the effect of napropamide on microbial communities, a PCR- DGGE-based experiment and cluster analysis of 16S rDNA community profiles were performed. Our analysis revealed an apparent difference in bacterial-community composition between the napropamide treatments and control. Addition of napropamide apparently increased the number of bands during the 7-14 d of incubation. These results imply that napropamide-induced toxicity was responsible for the disturbance of the microbial populations in soil.

关键词： napropamide microbial respiration microbial biomass soil enzyme PCR-DGGE bacterial community

Biomarkers for enhancing the radiosensitivity of nasopharyngeal carcinoma

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Cancer Biology & Medicine 2015年第1期12卷 23-32页

作者： Wei Chen guo-hua Hu Department of Otorhinolaryngology the First Affiliated Hospital of Chongqing Medical University

Nasopharyngeal carcinoma(NPC) is a common head and neck malignancy. The incidence of NPC is higher in Southern China and Southeast Asia compared with Western countries. Given its high radiosensitivity, the standard treatment for NPC is radiotherapy. However, radioresistance remains a serious obstacle to successful treatment. Radioresistance can cause local recurrence and distant metastases in some patients after treatment by radiation. Thus, special emphasis has been given to the discovery of effective radiosensitizers. This review aims to discuss the biomarkers, classified according to the main mechanisms of radiosensitization, which can enhance the sensitivity of NPC cells to ionizing radiation.

关键词： Nasopharyngeal carcinoma (NPC) radiotherapy radiosensitization biomarkers

BLUP Estimation of Linear Mixed-effects Models with Measurement Errors and Its Applications to the Estimation of Small Areas

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Acta Mathematica Sinica,English Series 2014年第12期30卷 2027-2044页

作者： Rong ZHU guo hua ZOU Academy of Mathematics and Systems Science Chinese Academy of Sciences

The linear mixed-effects model （LMM） is a very useful tool for analyzing cluster data. In practice, however, the exact values of the variables are often difficult to observe. In this paper, we consider the LMM with measurement errors in the covariates. The empirical BLUP estimator of the linear combination of the fixed and random effects and its approximate conditional MSE are derived. The application to the estimation of small area is provided. Simulation study shows good performance of the proposed estimators.

关键词： BLUP linear mixed-effects models measurement errors small area estimation

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汽车BCM的故障诊断设计及实现探析

内燃机与配件 2024年第5期 77-79页

作者：徐坚姜国华无锡汽车工程高等职业技术学校江苏无锡214101 无锡南洋职业技术学院江苏无锡214081

在汽车工业快速发展的新时代,不断加强技术研究和创新,才能不断提升车辆的安全性和稳定性,为广大车主提供更加安心的出行体验。为了能够更好的节约汽车电气系统成本,本文对于BCM负载控制系统完成了相对电流反馈装置的设计,其中包含了电... 详细信息

在汽车工业快速发展的新时代,不断加强技术研究和创新,才能不断提升车辆的安全性和稳定性,为广大车主提供更加安心的出行体验。为了能够更好的节约汽车电气系统成本,本文对于BCM负载控制系统完成了相对电流反馈装置的设计,其中包含了电路过载和短路故障以及开路故障的相关诊断方式。能够及时的针对部分工作电流完成有效的监测,也能够针对负载电流的具体转变情况以及驱动方案挑选与其相对的型号,对其产生的过载故障现象以及短路故障给予了精准的判断,让负载启动关闭都保持在一个正常状态。这样不仅可以实现原本的负载控制系统,并且还可以再出现短路故障和过载故障的过程中完成闭合保护。

关键词： BCM 故障诊断设计

数字经济对城乡融合发展的赋能效应与机制研究

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农业现代化研究 2024年第3期45卷 477-487页

作者：邵莹莹花俊国李冰冰河南农业大学经济与管理学院河南郑州450046 中国社会科学院数量经济与技术经济研究所北京100732

数据要素和数字技术的创新发展,为驱动城乡融合发展提供了新思路,也为解决“三农”问题、实现乡村振兴提供了新动能。本文基于2013—2021年全国31个省份(除港澳台外)省级面板数据,运用双固定效应模型和空间杜宾模型,实证检验了数字经济... 详细信息

数据要素和数字技术的创新发展,为驱动城乡融合发展提供了新思路,也为解决“三农”问题、实现乡村振兴提供了新动能。本文基于2013—2021年全国31个省份(除港澳台外)省级面板数据,运用双固定效应模型和空间杜宾模型,实证检验了数字经济对城乡融合发展的影响效果、作用机制以及空间效应。结果表明:1)数字经济的发展能够显著提高城乡融合发展水平;2)数字经济能够通过改善政府行为、促进科技创新来驱动城乡融合发展;3)数字经济对城乡融合发展的促进作用具有明显的地区异质性,中西部地区优于东部地区,空间面板回归显示,数字经济对城乡融合存在空间溢出效应。据此提出以下政策建议:不同地区应当根据自身经济、文化等地缘或环境优势,加快建设创新驱动、政府引导的现代化农业发展新格局,破除城乡二元结构,推动城乡差异化融合发展等。

关键词：数字经济城乡融合发展政府行为科技创新 “三农”问题

Phylogenomic analyses reveal intractable evolutionary history of a temperate bamboo genus (Poaceae: Bambusoideae)

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Plant Diversity 2019年第4期41卷 213-219页

作者： Cen guo Zhen-hua guo De-Zhu Li Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan650201China Kunming College of Life Science University of Chinese Academy of SciencesKunmingYunnan650201China

Shibataea is a genus of temperate bamboos(Poaceae:Bambusoideae)endemic to China,but little is known about its phylogenetic position and interspecific *** elucidate the phylogenetic relationship of the bamboo genus Shibataea,we performed genome-scale phylogenetic analysis of all seven species and one variety of the genus using double digest restriction-site associated DNA sequencing(dd RAD-seq)and whole plastid genomes generated using genome *** phylogenomic analyses based on dd RAD-seq and plastome data congruently recovered Shibataea as *** nuclear data resolved *** as the earliest diverged species,followed by ***,while the rest of Shibataea can be further divided into two ***,the plastid and nuclear topologies conflict *** comparing the results of network analysis and topologies reconstructed from different datasets,we identify *** as the most admixed species,which may be caused by incomplete lineage sorting(ILS)or interspecific gene flow with four sympatric *** study highlights the power of dd RAD and plastome data in resolving complex relationships in the intractable bamboo genus.

关键词： Shibataea ddRAD-seq Genome skimming Phylogeny Incongruence

An active reflector antenna using a laser angle metrology system

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Research in Astronomy and Astrophysics 2012年第6期12卷 713-722页

作者： Yong Zhang Jie Zhang De-hua Yang guo-hua Zhou Ai-hua Li guo-Ping Li National Astronomical Observatories/Nanjing Institute of Astronomical Optics ＆ Technology Chinese Academy of Sciences Nanjing 210042 China Key Laboratory of Astronomical Optics ＆ Technology Nanjing Institute of Astronomical Optics＆ Technology Chinese Academy of Sciences Nanjing 210042 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

An active reflector is one of the key technologies for constructing large telescopes, especially for millimeter/sub-millimeter radio telescopes. This article in- troduces a new efficient laser angle metrology system for an active reflector antenna on large radio telescopes. Our experiments concentrate on developing an active reflec- tor for improving the detection precisions and the maintenance of the surface shape in real time on the 65-meter prototype radio telescope constructed by Nanjing Institute of Astronomical Optics and Technology （NIAOT; http：//***/）. The test results indicate that the accuracy of the surface shape segmentation and maintenance has the dimensions of microns, and the time-response can be on the order of minutes. Our efforts proved to be workable for sub-millimeter radio telescopes.

关键词： radio radiation -- telescopes -- adaptive optics -- sub-millimeter

U-Pb geochronology of hydrothermal zircon from the Mesoproterozoic Gaoyuzhuang Formation on the northern margin of the North China Block and its geological implications

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Science China Earth Sciences 2011年第11期54卷 1675-1685页

作者： guo hua DU YuanSheng YANG JiangHai guo Liang Key Laboratory of Biogeology and Environmental Geology of Ministry of Education China University of Geosciences Wuhan 430074 China State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Wuhan 430074 China

This paper reports LA-ICP-MS zircon U-Pb ages and REE compositions on detrital zircons （Type 1） and hydrothermal zircons （Type 2） from low-metasedimentary rocks in the Mesoproterozoic Gaoyuzhuang Formation, Pingquan area, Hebei Province that provide important constraints on the tectonic evolution along the northern margin of the North China Block. The detrital zircons are characterized by an oscillatory magmatic core, surrounded by a narrow structureless rim in CL images. They yield 2~7pb/2~tpb ages ranging from 1703 to 2543 Ma with two age peaks at 2473 and 1794 Ma, which is consistent with the Neoarchean and Paleoproterozoic tectono-thermal events recorded in the NCB basement, indicating that the source of the detritus was locally derived. By contrast, the hydrothermal ones are euhedral, sector zoning or internally structureless. They have relatively higher U and Th contents and Th/U ratios （U=139-2918 ppm, Th=35-1327 ppm, Th/U （average） =0.78 vs. U=15-1044 ppm, Th=8-341 ppm, Th/U （average） =0.57 for detrital zircons）. Moreover, they are also enriched in REEs relative to detrital zircons and show a lower positive Ce anomaly （ZREE = 659-2418 ppm vs. 231-611 ppm for detrital zircon; Ce/Ce＊=2-13 vs. 33-174 for detrital zircons）, similar to known hydrothermal zircons derived from many locations. These characteristics, combined with our field petrographic observations, indicate that the hydrothermal zircons possibly formed from a low temperature aqueous fluid. Twelve concordant or near-concordant analyses on hydrothermal zircons yield weighted mean 206pb/238U ages of 325-327 Ma, which provide unambiguous evidence that the northern NCB underwent late Paleozoic low temperature hydrothermal modification. This timing of this hydrothermal event is compatible with that of the late Paleozoic magmatic and metamorphic-deformational events occurred on the northern margin of the NCB, it appears likely that the hydrothermal activity resulted from southward subduction of the Paleo-

关键词： hydrothermal zircon detrital zircon zircon geochronology late Paleozoic North China Block Central Asian Orogenicbelt