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Development characteristics and controlling factors of fractures in lacustrine shale and their geological significance for evaluating shale oil sweet spots in the third member of the Shahejie Formation in the Qikou Sag, Bohai Bay Basin
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作者 Xu Zeng Tao Yang +5 位作者 Jian-Wei Feng Cong-Sheng Bian Ming Guan Wei Liu Bing-Cheng Guo Jin Dong 《Petroleum Science》 SCIE EI CAS CSCD 2024年第2期791-805,共15页
Natural fractures are critical for shale oil and gas enrichment and development. Due to the extremely high heterogeneity of shale, the factors controlling the formation of internal fractures, especially horizontal fra... Natural fractures are critical for shale oil and gas enrichment and development. Due to the extremely high heterogeneity of shale, the factors controlling the formation of internal fractures, especially horizontal fractures, remain controversial. In this study, we integrate thin section analysis and microcomputed tomography(CT) data from several lacustrine shale samples from the third member(Es3) of the Shahejie Formation, Qikou Sag, Bohai Bay Basin, to assess the fractures in detail. The goal is to reveal the development characteristics, controlling factors, and geological significance for evaluating sweet spots in a shale oil play. The fractures in the Es3contain high-angle structural and horizontal bed-parallel fractures that are mostly shear and extensional. Various factors influence fracture development,including lithofacies, mineral composition, organic matter content, and the number of laminae. Structural fractures occur predominantly in siltstone, whereas bed-parallel fractures are abundant in laminated shale and layered mudstone. A higher quartz content results in higher shale brittleness, causing fractures, whereas the transformation between clay minerals contributes to the development of bedparallel fractures. Excess pore pressure due to hydrocarbon generation and expulsion during thermal advance can cause the formation of bed-parallel fractures. The density of the bed-parallel and structural fractures increases with the lamina density, and the bed-parallel fractures are more sensitive to the number of laminae. The fractures are critical storage spaces and flow conduits and are indicative of sweet spots. The laminated shale in the Es3with a high organic matter content contains natural fractures and is an organic-rich, liquid-rich, self-sourced shale play. Conversely, the siltstone, massive mudstone, and argillaceous carbonate lithofacies contain lower amounts of organic matter and do not have bed-parallel fractures. However, good reservoirs can form in these areas when structural fractures are present and the source, and storage spaces are separated. 展开更多
关键词 FRACTURES Development characteristics Controlling factors Shale oil Sweet spot
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Artificial intelligence in physiological characteristics recognition for internet of things authentication
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作者 Zhimin Zhang Huansheng Ning +2 位作者 Fadi Farha Jianguo Ding Kim-Kwang Raymond Choo 《Digital Communications and Networks》 SCIE CSCD 2024年第3期740-755,共16页
Effective user authentication is key to ensuring equipment security,data privacy,and personalized services in Internet of Things(IoT)systems.However,conventional mode-based authentication methods(e.g.,passwords and sm... Effective user authentication is key to ensuring equipment security,data privacy,and personalized services in Internet of Things(IoT)systems.However,conventional mode-based authentication methods(e.g.,passwords and smart cards)may be vulnerable to a broad range of attacks(e.g.,eavesdropping and side-channel attacks).Hence,there have been attempts to design biometric-based authentication solutions,which rely on physiological and behavioral characteristics.Behavioral characteristics need continuous monitoring and specific environmental settings,which can be challenging to implement in practice.However,we can also leverage Artificial Intelligence(AI)in the extraction and classification of physiological characteristics from IoT devices processing to facilitate authentication.Thus,we review the literature on the use of AI in physiological characteristics recognition pub-lished after 2015.We use the three-layer architecture of the IoT(i.e.,sensing layer,feature layer,and algorithm layer)to guide the discussion of existing approaches and their limitations.We also identify a number of future research opportunities,which will hopefully guide the design of next generation solutions. 展开更多
关键词 Physiological characteristics recognition Artificial intelligence Internet of things Biological-driven authentication
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Spatial Protection and Development of Traditional Mountain Settlements from the Perspective of Self-organization : A Case Study of Anju Ancient Town in Tongliang District, Chongqing
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作者 Xin QU 《Meteorological and Environmental Research》 2024年第1期48-56,共9页
Through literature research, field research and urban design analysis methods, based on the self-organization theory, the evolution characteristics of the settlement space of Anju Ancient Town with significant charact... Through literature research, field research and urban design analysis methods, based on the self-organization theory, the evolution characteristics of the settlement space of Anju Ancient Town with significant characteristics of traditional mountain settlements were analyzed, and then its internal and external influencing factors were summarized. Finally, appropriate protection and development strategies were proposed, such as reasonably planning functional zones, breaking through the single structure, and creating a good living cultural environment. The innovation of this study is that it integrates the self-organization theory into the cognition of traditional mountain settlement space, and discusses the connection between the mountain settlement space and the traditional regional context under the modern development concept, so as to seek the benign protection and reasonable development of traditional mountain settlement space. 展开更多
关键词 Traditional mountain settlements Self-organization theory Spatial characteristics Protection and development Anju Ancient Town
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基于用地性质与乘客需求特性分析的TOD开发方案优化思路与方法研究
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作者 陆化普 叶桢翔 张永波 《城市设计》 2024年第1期22-29,共8页
积极推进轨道交通站点与周边土地使用的深度一体化,已经成为城市高质量发展的关键。然而,TOD项目有成功,也有失败。本文通过天津、重庆案例深入分析了TOD项目成败的关键,在此基础上提出了TOD项目潜在客户需求总量与需求结构分析的思路... 积极推进轨道交通站点与周边土地使用的深度一体化,已经成为城市高质量发展的关键。然而,TOD项目有成功,也有失败。本文通过天津、重庆案例深入分析了TOD项目成败的关键,在此基础上提出了TOD项目潜在客户需求总量与需求结构分析的思路与方法,最后提出了优化评价TOD项目的评价分析指标,期待能为推进TOD深度发展和广泛应用提供参考。 展开更多
关键词 toD 需求特性 交通与土地使用深度融合
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Development Paths of Characteristic Towns in Underdeveloped Areas in Central China——A Case Study of Yichun,Jiangxi 被引量:1
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作者 Cuiping HUANG Wei WU Xiying HU 《Asian Agricultural Research》 2018年第12期30-32,共3页
The demonstration effect triggered by the construction of Zhejiang's characteristic towns has attracted attention and learning from all over the country,and has set off a boom in building characteristic towns acro... The demonstration effect triggered by the construction of Zhejiang's characteristic towns has attracted attention and learning from all over the country,and has set off a boom in building characteristic towns across the country. Under the dual constraints of industrial development and resource intensive use,the undeveloped areas of central China must find suitable development paths for characteristic towns. Taking Yichun City as an example,this article analyzes the advantages of Yichun City for developing characteristic towns combining its natural and economic conditions. In addition,the characteristic town development paths,such as vigorously promoting the construction of urban facilities,highlighting the characteristics relying on existing small towns,constructing an industrial chain of " ecology + leisure",highlighting cultural charm,and improving development grade,are proposed to provide useful reference for the development of characteristic towns in this type of underdeveloped cities in central China. 展开更多
关键词 CHARACTERISTIC Town Development PATH Yichun JIANGXI
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Failure characteristics and fracture mechanism of overburden rock induced by mining:A case study in China
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作者 Jiawei Li Meng Zhang +2 位作者 Changxiang Wang Changlong Liao Baoliang Zhang 《International Journal of Coal Science & Technology》 EI CAS CSCD 2024年第3期241-255,共15页
This study employs similar simulation testing and discrete element simulation coupling to analyze the failure and deformation processes of a model coal seam's roof.The caving area of the overburden rock is divided... This study employs similar simulation testing and discrete element simulation coupling to analyze the failure and deformation processes of a model coal seam's roof.The caving area of the overburden rock is divided into three zones:the delamination fracture zone,broken fracture zone,and compaction zone.The caving and fracture zones'heights are approximately 110 m above the coal seam,with a maximum subsidence of 11 m.The delamination fracture zone's porosity range is between 0.2 and 0.3,while the remainder of the roof predominantly exhibits a porosity of less than 0.1.In addition,the numerical model's stress analysis revealed that the overburden rock's displacement zone forms an'arch-beam'structure starting from 160 m,with the maximum and minimum stress values decreasing as the distance of advancement increases.In the stress beam interval of the overburden rock,the maximum value changes periodically as the advancement distance increases.Based on a comparative analysis between observable data from on-site work and numerical simulation results,the stress data from the numerical simulation are essentially consistent with the actual results detected on-site,indicating the validity of the numerical simulation results. 展开更多
关键词 Fracture development characteristics Similar simulation experiment Layer porosity Discrete element numerical simulation
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Morphological and cytological assessments reveal pollen degradation causes pollen abortion in cotton cytoplasmic male sterility lines
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作者 PEI Qingyu LIU Jinshan +10 位作者 GUO Chunping MA Xiaomei LIU Xiaoyan YOU Chunyuan LIN Hairong LI Zhibo ZHAO Ruihai ZHU Bo WU Yuanlong PAN Zhenyuan NIE Xinhui 《Journal of Cotton Research》 CAS 2024年第3期266-276,共11页
Background Understanding the mechanism of male sterility is crucial for producing hybrid seeds and developing sterile germplasm resources.However,only a few cytoplasmic male sterility(CMS)lines of cotton have been pro... Background Understanding the mechanism of male sterility is crucial for producing hybrid seeds and developing sterile germplasm resources.However,only a few cytoplasmic male sterility(CMS)lines of cotton have been produced due to several challenges,like inadequate variation of agronomic traits,incomplete sterility,weak resilience of restorer lines,and difficulty in combining strong dominance.Therefore,the morphological and cytological identification of CMS in cotton will facilitate hybrid breeding.Results Two F_(2) segregating populations of cotton were constructed from cytoplasmic male sterile lines(HaA and 01A,maternal)and restorer lines(HaR and 26R,paternal).Genetic analysis of these populations revealed a segregation ratio of 3:1 for fertile to sterile plants.Phenotypic analysis indicated no significant differences in traits of flower bud development between sterile and fertile plants.However,sterile plants exhibited smaller floral organs,shortened filament lengths,and anther atrophy on the flowering day in comparison with the fertile plants.When performed scanning electron microscopy(SEM),the two F_(2) populations revealed morphological variations in the anther epidermis.Cellular analysis showed no significant differences in pollen development before pollen maturation.Interestingly,between the pollen maturation and flowering stages,the tapetum layer of sterile plants degenerated prematurely,resulting in abnormal pollen grains and gradual pollen degradation.Conclusion The results of this study suggest that fertility-restoring genes are controlled by a single dominant gene.Sterile plants exhibit distinctive floral morphology,which is characterized by stamen atrophy and abnormal anthers.Pollen abortion occurs between pollen maturity and flowering,indicating that premature tapetum degradation may be the primary cause of pollen abortion.Overall,our study provides a theoretical basis for utilizing CMS in hybrid breeding and in-depth investigation of the dominant configuration of cotton hybrid combinations,mechanisms of sterility,and the role of sterile and restorer genes. 展开更多
关键词 COTtoN Cytoplasmic male sterility Genetic analysis Morphological characteristics Pollen development
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Failure process and monitoring data of an extra-large landslide at the Nanfen Open-pit Iron Mine
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作者 WANG Jingxiang YANG Xiaojie +2 位作者 TAO Zhigang HE Manchao SHEN Fuxin 《Journal of Mountain Science》 SCIE CSCD 2024年第9期2918-2938,共21页
An extra-large landslide occurred on June 19,2021,on the footwall slope of the Nanfen Open-pit Iron Mine in Liaoning Province,China,with a volume of approximately 1.2×107 m3.To elucidate the causative factors,dev... An extra-large landslide occurred on June 19,2021,on the footwall slope of the Nanfen Open-pit Iron Mine in Liaoning Province,China,with a volume of approximately 1.2×107 m3.To elucidate the causative factors,development process,and destructive mechanisms of this catastrophic landslide,comprehensive field tests,investigations,and laboratory experiments were conducted.Initially,the heavily weathered rock mass of the slope was intersected by faults and joint fissures,facilitating rainwater infiltration.Moreover,the landslide contained a substantial clay mineral with highly developed micro-cracks and micro-pores,exhibiting strong water-absorption properties.As moisture content increased,the rock mass underwent softening,resulting in reduced strength.Ultimately,continuous heavy rainfall infiltration amplified the slope's weight,diminishing the weak structural plane's strength,leading to fracture propagation,slip plane penetration,and extensive tensile-shear and uplift failure of the slope.The study highlights poor geological conditions as the decisive factor for this landslide,with continuous heavy rainfall as the triggering factor.Presently,adverse environmental factors persistently affect the landslide,and deformation and failure continue to escalate.Hence,it is imperative to urgently implement integrated measures encompassing slope reinforcement,monitoring,and early-warning to real-time monitor the landslide's deformation and deep mechanical evolution trends. 展开更多
关键词 Landslide development process Extra-large landslide Heavy rainfall Failure characteristics Instability mechanism Landslide monitoring and early-warning
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存量语境下TOD理论迭代——公共交通支持发展的特征、进展与路径
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作者 万融 卢峰 +1 位作者 范惟晶 康阔 《现代城市研究》 北大核心 2024年第9期89-94,99,共7页
当下我国公共交通导向发展(transit-oriented development,TOD)实践未能较好应对存量语境下的城市发展。首先,文章基于存量语境下TOD目标取向和侧重点的转变,提出TOD迭代理论——公共交通支持发展(transit supportive development,TSD)... 当下我国公共交通导向发展(transit-oriented development,TOD)实践未能较好应对存量语境下的城市发展。首先,文章基于存量语境下TOD目标取向和侧重点的转变,提出TOD迭代理论——公共交通支持发展(transit supportive development,TSD)理论。其次,系统回顾与梳理了存量语境下TSD的新实践特征和国内外进展,并结合中国语境,构建区域/城市宏观布局调控、站域中观城市更新策划、站域中微观宜居社区塑造三方面的本土化实践路径,以期为公共交通支持下的中国城市转型发展提供参考。 展开更多
关键词 存量 公共交通支持发展 特征 进展 路径
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Follow-up study of gallbladder stones in 44 children
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作者 Jian-Xiong Yu Zhi-Zhong Jiang +2 位作者 Yuan-Hao Cai Lin Zhou Bin Cai 《World Journal of Clinical Cases》 SCIE 2024年第18期3403-3409,共7页
BACKGROUND Cholesterol stones affect a certain subpopulation of children.Concerns have been raised on the impact of gallbladder surgery on the growth of children and adolescents.AIM To study the population characteris... BACKGROUND Cholesterol stones affect a certain subpopulation of children.Concerns have been raised on the impact of gallbladder surgery on the growth of children and adolescents.AIM To study the population characteristics,clinical features,treatment,and prognosis of gallstones in children.METHODS The clinical data of 44 children with gallstones admitted to The First Affiliated Hospital of Naval Medical University from August 2009 to August 2021 were collected,the children were followed up by telephone to monitor their prognoses.The follow-up ended in August 2023.The shortest follow-up time was 2 years and 6 months,whereas the longest was 13 years and 11 months.The population characteristics,general clinical characteristics,and treatments were retrospectively analyzed.The children were divided according to whether they underwent surgical gallbladder removal into an operation group(n=28)and a non-operation group(n=16),The effects of surgical gallbladder resection on the growth and development of children were analyzed.RESULTS The male–female ratio in the population was 6:5 and 84.09%of the children had onset in adolescence.Furthermore,29.55%of the children were overweight or obese.The study identified 26 cases with metabolic abnormalities,9 with hemolytic anemia,and 4 with choledochal cyst.Of the population,68.18%had recurrent symptomatic cholecystolithiasis.Surgical treatment accounted for 63.64%,with laparoscopic cholecystectomy accounting for 71.43%of surgical treatment.No significant differences were observed in symptoms and complications between the surgery and non-surgery groups.Furthermore,no significant differences were found between the two groups in the attainment of genetic height target and the rightward shift of height curve during follow-up.CONCLUSION The sex characteristics of gallstones in children were not observed.Most gallstones occurred in adolescents and rarely in young children.A considerable proportion of children have inborn causes,which are often concurrent with metabolic abnormalities and hemolytic anemia.Most children had recurrent symptomatic gallstones.Surgical treatment,especially laparoscopic cholecystectomy,is still the main treatment for gallstones in children.Surgical treatment did not affect the growth and development of children who underwent gallstone removal. 展开更多
关键词 Gallstones in children Clinical characteristics Growth and development Operation Clinical features
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Research on the Relationship between the School-Running Characteristics of Private Colleges and Universities and the Development Objectives of the Government
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作者 Lishuxian Zhao Xiaoxia Wu Zhuolin Zhu 《Journal of Contemporary Educational Research》 2024年第9期296-302,共7页
The development objectives of the Chinese government have a guiding effect on the school-running characteristics of private colleges and universities.This paper explores the relationship between the characteristics of... The development objectives of the Chinese government have a guiding effect on the school-running characteristics of private colleges and universities.This paper explores the relationship between the characteristics of private colleges and universities and the development objectives of the provincial government,using Jiangsu Province as a case study.All the schools have the consciousness of fully considering the development objectives of Jiangsu Province when formulating the school-running characteristics.Their characteristics all contain some training methods,training courses,or institutional construction aiming at the development objectives.Most universities can support the government’s objectives on employment and innovation.Only a third of the schools provide government support for science research.Private colleges and universities should make full use of the free and flexible advantages of private education,combine them with the continuous changes of policies and markets,and create clear,scientific,and dynamic school-running characteristics,in order to achieve long-term development. 展开更多
关键词 Development objectives of the government School-running characteristics Chinese Private colleges and universities
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Construction controlling and strength increasing characteristics of locally developed epoxy asphalt mixture 被引量:7
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作者 陈春 钱振东 陈磊磊 《Journal of Southeast University(English Edition)》 EI CAS 2011年第1期61-64,共4页
The construction controlling elements,including construction performance at low ambient temperatures,reserved time ranges,and the strength increasing rule,for locally developed epoxy asphalt mixture(LDEAM) are studi... The construction controlling elements,including construction performance at low ambient temperatures,reserved time ranges,and the strength increasing rule,for locally developed epoxy asphalt mixture(LDEAM) are studied through laboratory tests.Air void and Marshall stability are chosen as the performance measures for evaluating the construction quality.The wheel rolling test is used to simulate the actual construction situations,while the Marshall test and the Brookfield viscosity test are adopted to study the strength increasing rule.The experimental results reveal that the LDEAM can be constructed under a low ambient temperature condition of 10℃,and its longest reserved time is 70 min at a reserved temperature of 120℃.Test also shows that the strength of the LDEAM increases with time and temperature before cured.Finally,the theoretical reason for the strength increasing rule is analyzed on the basis of the organic chemistry theory. 展开更多
关键词 construction characteristics locally developed epoxy asphalt strength increasing characteristics
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Effects of Nitrogen Application Amount on Growth Characteristics,Boll Development and Lint Yield of High Quality Cotton 被引量:1
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作者 周桂生 林岩 +2 位作者 童晨 安琳琳 刘贵娟 《Agricultural Science & Technology》 CAS 2011年第11期1667-1670,共4页
[Objective] This study aimed to explore an optimum application amount of nitrogen for cotton cultivation. [Method] In this study, a field experiment was conducted to investigate the effects of nitrogen application amo... [Objective] This study aimed to explore an optimum application amount of nitrogen for cotton cultivation. [Method] In this study, a field experiment was conducted to investigate the effects of nitrogen application amount on the growth characteristics, boll development and lint yield of high quality cotton line FZ-1. [Result] Compared with the nitrogen level of 225 kg/hm2, the lint yield had increased by 28.46% and 18.73%, respectively, with the nitrogen application amount of 300 and 375 kg/hm2. When the nitrogen application amount had increased from 225 to 300 kg/hm2, boll number per plant, boll weight and lint yield had significantly increased. At the nitrogen level of 375 kg/hm2, however, the effects of increasing lint yield were significantly less than that at the nitrogen level of 300 kg/hm2. Compared with the nitrogen levels of 225 and 375, 300 kg/hm2 of nitrogen was the optimum application amount to improve the plant height, daily increment of plant height, number of fruit branches, number ratio of nodes to fruit branches, boll volume and seed cotton weight per boll. [Conclusion] The rational management of nitrogen is the most effective way to promote the growth and development of cotton plants, ensure high yielding ability and minimize the environmental pollution caused by the overuse of nitrogen. This study had provided a sound nitrogen application strategy for the cultivation of this high-quality cotton line in the field plantation. 展开更多
关键词 Nitrogen application amount Growth characteristics Boll development Lint yield
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Study on Growth and Photosynthetic Characteristics of Pepper under Different Fertilization Modes
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作者 高晶霞 曹丽华 +2 位作者 吴雪梅 马守才 谢华 《Agricultural Science & Technology》 CAS 2016年第12期2811-2814,共4页
With the new pepper cultivar Guanlong as a test material, effects of differ-ent fertilizer application modes on growth and development, yield and photosynthetic characteristics of pepper were studied. The results show... With the new pepper cultivar Guanlong as a test material, effects of differ-ent fertilizer application modes on growth and development, yield and photosynthetic characteristics of pepper were studied. The results showed that the plant height and plant expansion of pepper in T4 were the largest, of 104.3 and 90.6 cm, respec-tively. T1 showed the largest weight of single fruit, fruit length and fruit diameter, re-spectively of 101.6 g, 25.49 cm and 4.86 cm. The content of total chlorophyl in the leaves of T1 was the highest, of 66.7 mg/g, and the root activity of T1 was also the highest, of 100.6 g/(g·FW·h). The net photosynthetic rate of pepper leaves in T5 was the highest, of 6.6 μmol/(m^2·s), while the net photosynthetic rates of T1 and T2 were the lowest, fluctuating in the range of 1.3-2.5 μmol/(m^2·s). T3 showed the highest decrease amplitude of stomatal conductance in pepper leaves, of 2 658.1 mol/(m^2·s), while the decrease amplitudes of stomatal conductance of pepper leaves in treatments T2 and T5 were the lowest, fluctuating in the range of 386.7-428.7 mol/(m^2·s). T1 showed the highest decrease amplitude of transpiration rate of pepper leaves, of 4.7 mmol/(m^2·s), while treatment T5 showed the lowest decrease ampli-tude of transpiration rate of pepper leaves, of 1.1 mmol/(m^2·s). The intercel ular CO2 concentration was the highest in the leaves of T5, of 436.8 μmol/mol. T1 showed the highest plot output, yield per hectare and benefit, of 340.1 kg, 96 448.5 kg/hm^2 and 162 865.6 Yuan/hm^2, respectively, while T3 exhibited the lowest plot output, yield per hectare and benefit, of 260.8 kg, 74 338.5 kg/hm^2 and 124 888.5 Yuan/hm^2, respec-tively. 展开更多
关键词 Fertilizer types Arch shed PEPPER Growth and development Photo-synthetic characteristics
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Agricultural Heritage Systems Tourism: definition,characteristics and development framework 被引量:7
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作者 TIAN Mi MIN Qing-wen +6 位作者 JIAO Wen-jun YUAN Zheng Anthony M.FULLER YANG Lun ZHANG Yong-xun ZHOU Jie CHENG Bing 《Journal of Mountain Science》 SCIE CSCD 2016年第3期440-454,共15页
Architectural heritage comprises one o the most important elements of mountain settlements in Greece. It holds high cultural value, represents the tangible continuation of the past and forms the unique character and i... Architectural heritage comprises one o the most important elements of mountain settlements in Greece. It holds high cultural value, represents the tangible continuation of the past and forms the unique character and identity of each mountain region. Yet, controversy regarding funding for its preservation often arises. In this paper, we used two Contingent Valuation surveys to estimate the socia benefit deriving from protecting the traditiona architecture in the mountainous village of Sirako and through it, to examine perceptions and attitudes o local residents and visitors. Research findings revealed a strong social will in favor of the good's protection followed by high percentages of positive willingness to pay(WTP). However, WTP is significantly higher among residents. Cultura heritage value, of the good, appears to prevail, along with the environmental one. However, both residents and visitors pointed out that local heritage, if wellpreserved, will boost tourism development. Residents appeared to better recognize the true level o architectural decay, expressed higher apprehension for its protection and were willing to pay higher amount of money. Tourists, on the other side expressed high satisfaction for their visit, appreciated the beauty and serenity emerging from local built and natural environment and spent several days visiting the surrounding area. The longer they stayed and gotfamiliar with the village, the more willing they were to contribute to local heritage's protection. Percentages reflecting indifference for protecting architecture were extremely low. Yet, they were higher among tourists. Traditional architecture is considered as public good; an opinion resulting in an important percentage of visitors stating that national government should provide the necessary funding. In addition, the architecture appears to hold a high level of topicality. Those descending from Sirako or emotionally connected to it, of both social groups,turned out to be more concerned about the good and with a stronger sense of responsibility for it. Usevalue of the good holds high economic value, as well,while higher percentages of zero WTP appeared among non-users. Research findings revealed social attitudes and perceptions on what constitutes architectural heritage, in its cultural and economic frame. If taken under consideration, they may form useful drivers for local, heritage-based, sustainable 展开更多
关键词 Agricultural Heritage Systems tourism tourism perceptions tourism characteristics Development framework Artisan farmers
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COMPARISON OF THE STRUCTURAL CHARACTERISTICS OF DEVELOPED VERSUS UNDEVELOPED MID-LEVEL VORTEXES 被引量:1
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作者 黄辉军 袁金南 +1 位作者 李春晖 毛伟康 《Journal of Tropical Meteorology》 SCIE 2014年第1期57-65,共9页
Using the NCEP 1°×1°reanalysis data,several obvious differences of the structural characteristics of developed versus undeveloped mid-level vortexes are studied.First,the central vorticity of the develo... Using the NCEP 1°×1°reanalysis data,several obvious differences of the structural characteristics of developed versus undeveloped mid-level vortexes are studied.First,the central vorticity of the developed mid-level vortex increases towards higher levels while the undeveloped one decreases.The low-level convergence structure maintains well in the developed mid-level vortex whereas the undeveloped one does badly.Second,on the one hand,according to the symmetric analysis,the horizontal wind field and wind vertical section of the developed mid-level vortex are well symmetric while those of the undeveloped one are less symmetric.Meanwhile,weak wind vertical shear help the developed mid-level vortex to establish a warm core in upper-and mid-levels of the troposphere.On the other hand,according to the balance analysis,better balance between wind and pressure is shown in the mid-and lower-levels of the troposphere of the developed mid-level vortex than in those of the undeveloped vortex.Third,positive anomaly of potential vorticity is enhanced and developed in the vertical direction of the developed vortex.However,the undeveloped vortex weakens with a weak positive anomaly. 展开更多
关键词 South China Sea area tropical cyclone genesis and development mid-level vortex structural characteristics
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Green development model and cultivating path for characteristic small town 被引量:2
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作者 ZHANG Yu-meng 《Ecological Economy》 2017年第1期80-88,共9页
In the context of the new urbanization,the characteristic town,as a new hotspot to developing rapidly to explore the industry,humanities,community integration town model,a urbanization and high-tech industry developme... In the context of the new urbanization,the characteristic town,as a new hotspot to developing rapidly to explore the industry,humanities,community integration town model,a urbanization and high-tech industry development booster,by the government and developers attention.At the same time,the green development model applies to the characteristic town of industrial upgrading and transformation,guiding the future characteristic town of green economic industry development direction.This paper studies the green development model of the characteristic town,and puts forward the implementation of the green industry through the greening industry structure,promoting green consumption and optimizing the green management. 展开更多
关键词 characteristic town green development model cultivating path
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The Development Model of Tourism-Based Retirement Towns 被引量:1
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作者 YANG Yiqian CHEN Xiaogang LI Xiaoyun 《Journal of Landscape Research》 2018年第4期145-148,152,共5页
Based on the analysis of the tourism-based fetkement models this papet proposed five types of retirement towns, which combined the eldercare industry with ecological conditions, the style and features of ancient... Based on the analysis of the tourism-based fetkement models this papet proposed five types of retirement towns, which combined the eldercare industry with ecological conditions, the style and features of ancient towns, ttaditional cultute, die artistic envifonment, and medical cafe, and put forward relevant planning strategies from five aspects, namely, site selection, silver industry chain, functional demand, operation management mode, and safety guarantee system, providing a reference for the construction and development of domestic tourism-based retitement towns. 展开更多
关键词 Agingj tourism-based retirement Characteristic town Development model
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Sedimentary filling characteristics and controlling factors of lacustrine microbial carbonates sequence in the Santos Basin,Brazil 被引量:1
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作者 HE Sai LI Guorong +9 位作者 WU Changrong LIU Shugen ZHANG Zhongmin SU Yushan ZHU Yixuan HE Zhao REN Jie WANG Yuchen ZHOU Wei WANG Yajie 《Petroleum Exploration and Development》 CSCD 2022年第4期785-796,共12页
Based on comprehensive analysis of seismic,logging,core,thin section data,and stable isotopic compositions of carbon and oxygen,the sedimentary filling characteristics of the Lower Cretaceous Barra Velha Formation seq... Based on comprehensive analysis of seismic,logging,core,thin section data,and stable isotopic compositions of carbon and oxygen,the sedimentary filling characteristics of the Lower Cretaceous Barra Velha Formation sequence in H oil field,Santos Basin,are studied,and the high-frequency sequence stratigraphic framework is established,and the spatial distribution of reef-shoal bodies are predicted and the controlling factors are discussed.During the depositional period of the Barra Velha Formation,the study area is a slope-isolated platform-slope sedimentary pattern from southwest to northeast and the change of climate background from rift to depression periods has resulted in the variation of sedimentary characteristics from the lower third-order sequence SQ1(BVE 300 Member)of low-energy deep water to the upper third-order sequence SQ2(BVE 200 and 100 members)of high-energy shallow water in the Barra Velha Formation.The activities of extensional faults and strike-slip faults in rift period and the sedimentary differentiation from platform margin to intra-platform in depression period made the sedimentary paleogeomorphology in these two periods show features of“three ridges and two depressions”.The reef-shoal bodies mainly developed in the SQ2-LHST period,with vertical development positions restricted by the periodic oscillation of the lake level,and developed on the top of each high-frequency sequence stratigraphic unit in SQ2-LHST in the platform.The strike-slip fault activity controlled the distribution of the reef-shoal bodies on the plane by changing the sedimentary paleogeomorphology.The positive flower-shaped strike-slip faults made the formation of local highlands at the margins of and inside the shallow water platforms and which became high-energy sedimentary zones,creating conditions for the development of reef-shoal bodies. 展开更多
关键词 Santos Basin Brazil Lower Cretaceous Barra Velha Formation lacustrine microbial carbonate high-frequency sequence sedimentary filling characteristics reef-shoal body development model
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Geological characteristics of the southern segment of the Late Sinian–Early Cambrian Deyang-Anyue rift trough in Sichuan Basin, SW China 被引量:3
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作者 LI Rong WANG Yongxiao +4 位作者 WANG Zecheng XIE Wuren LI Wenzheng GU Mingfeng LIANG Zirui 《Petroleum Exploration and Development》 SCIE 2023年第2期321-333,共13页
Based on the latest drilling, seismic and field outcrop data, the geological characteristics(e.g. strata, development and sedimentary evolution) of the southern segment of the Late Sinian–Early Cambrian Deyang–Anyue... Based on the latest drilling, seismic and field outcrop data, the geological characteristics(e.g. strata, development and sedimentary evolution) of the southern segment of the Late Sinian–Early Cambrian Deyang–Anyue rift trough in the Sichuan Basin are analyzed. First, the strata in the southern segment are complete. The first to second members of Dengying Formation(Deng 1 + Deng 2) are found with relatively stable thickness(400–550 m), and the third to fourth members(Deng 3+ Deng 4) show great thickness difference between the marginal trough and the inner trough, which is up to 250 m. The Cambrian Maidiping Formation and Qiongzhusi Formation in southern Sichuan Basin are relatively thin, with the thickness changing greatly and frequently. Second, the Deyang–Anyue rift trough extended southward during the Deng 4 period, affecting southern Sichuan Basin. Compared to the middle and northern segments of the rift trough, the southern segment is generally wide, gentle and shallow, with multiple steps, and alternating uplifts and sags, which are distributed in finger shape. Third, the Deng 1 + Deng 2 in southern Sichuan Basin records the dominance of carbonate platform and unobvious sedimentary differentiation, and the Deng 4 exhibits obvious sedimentary differentiation, namely, basin–slope–secondary slope–slope–secondary slope–platform margin–restricted platform, from the inner trough to the marginal trough. Fourth, the rift trough in southern Sichuan Basin has evolved in four stages: stabilization of Deng 1–Deng 2, initialization of Deng 3–Deng 4, filling of Maidiping–Qiongzhusi, and extinction of Canglangpu Formation. 展开更多
关键词 Deyang-Anyue rift trough geological characteristics secondary slope development and evolution Cambrian Maidiping Formation Cambrian Qiongzhusi Formation Sinian Dengying Formation Sichuan Basin
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