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Designing a Comprehensive Data Governance Maturity Model for Kenya Ministry of Defence
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作者 Gilly Gitahi Gathogo Simon Maina Karume Josphat Karani 《Journal of Information Security》 2025年第1期44-69,共26页
The study aimed to develop a customized Data Governance Maturity Model (DGMM) for the Ministry of Defence (MoD) in Kenya to address data governance challenges in military settings. Current frameworks lack specific req... The study aimed to develop a customized Data Governance Maturity Model (DGMM) for the Ministry of Defence (MoD) in Kenya to address data governance challenges in military settings. Current frameworks lack specific requirements for the defence industry. The model uses Key Performance Indicators (KPIs) to enhance data governance procedures. Design Science Research guided the study, using qualitative and quantitative methods to gather data from MoD personnel. Major deficiencies were found in data integration, quality control, and adherence to data security regulations. The DGMM helps the MOD improve personnel, procedures, technology, and organizational elements related to data management. The model was tested against ISO/IEC 38500 and recommended for use in other government sectors with similar data governance issues. The DGMM has the potential to enhance data management efficiency, security, and compliance in the MOD and guide further research in military data governance. 展开更多
关键词 Data Governance maturity Model maturity Index Kenya Ministry of Defence Key Performance Indicators Data Security Regulations
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Stable carbon isotope compositions of individual light hydrocarbons in oils: New indicator of source facies and maturity
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作者 Donglin Zhang Meijun Li Rongzhen Qiao 《Geoscience Frontiers》 2025年第5期455-469,共15页
Light hydrocarbons(LHs)are key components of petroleum,and the carbon isotopes composition(δ^(13)C)of individual LHs contains a wealth of geochemical information.Forty-four oil samples from five different basins were... Light hydrocarbons(LHs)are key components of petroleum,and the carbon isotopes composition(δ^(13)C)of individual LHs contains a wealth of geochemical information.Forty-four oil samples from five different basins were analyzed using gas chromatography(GC),gas chromatography-mass spectrometry(GC–MS),and gas chromatography-isotope ratio mass spectrometry(GC-IRMS).Theδ^(13)C values of forty-three LHs were recognized and determined by comparing the GC and GC-IRMS methods.The results revealed significant differences inδ^(13)C distribution characteristics among different LH compounds.Theδ^(13)C variation of individual LHs in iso-paraffins showed the widest range,followed by cycloalkanes and aromatics,whereas theδ^(13)C variation in n-paraffins showed the narrowest range.Theδ^(13)C values of most individual LHs are primarily affected by the source facies and thermal evolution.Among them,c-1,3-dimethylcyclohexane(c-1,3DMCH)is mainly sourced from higher plants but may also form through abiotic mechanisms such as catalysis or cyclization.Theδ^(13)C values of c-1,3DMCH(δ^(13)Cc-1,3DMCH)primarily exhibit parental genetic characteristics,enabling effective distinction of oil from different source facies.Specifically,theδ^(13)Cc-1,3DMCH in marine oils,lacustrine oils,terrigenous oils,and coal-formed oils are<–22‰,from–22‰to−20.2‰,from−20.2‰to−18.4‰,and>−18.4‰,respectively.Moreover,maturity is the primary controlling factor forδ^(13)C values of 3MC7(δ^(13)C3MC7,3MC7:3-methylheptane),while the source facies serve as a secondary influence.The plot ofδ^(13)Cc-1,3DMCH andδ^(13)C3MC7 was introduced to classify source facies.Asδ^(13)Cc-1,3DMCH andδ^(13)C3MC7 increase,the source facies transits from marine to lacustrine,then terrigenous,and finally coal facies.Additionally,increasingδ^(13)C3MC7 indicates a relative increase in maturity.Therefore,theδ^(13)Cc-1,3DMCH vs.δ^(13)C3MC7 plot serves as an effective tool for distinguishing source facies and assessing relative maturity. 展开更多
关键词 Light hydrocarbons Individual carbon isotope Source facies maturity
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Toward Digital Technology Maturity:Empowering Small Medium Enterprise in Sleman Yogyakarta Indonesia Toward Sustainable Tourism and Creative Economy Development
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作者 Ayu Helena Cornellia Robertus Saptoto Kamila Salsabela 《Journalism and Mass Communication》 2025年第2期98-112,共15页
In the era of global tourism and creative economies,digital technology maturity has emerged as a critical factor for the sustainable development of small and medium enterprises(SMEs)in Indonesia.This research is imple... In the era of global tourism and creative economies,digital technology maturity has emerged as a critical factor for the sustainable development of small and medium enterprises(SMEs)in Indonesia.This research is implemented to find out current digital technology maturity levels among SMEs in the subdistrict of Cangkringan,district of Sleman,Yogyakarta,Indonesia,highlighting their role in fostering sustainable tourism and creative economic growth.Using a mixed-method approach,the research combines qualitative insights from in-depth interviews with three local government representatives and Focus Group Discussion with 15 SMEs in the area.Additionally,a quantitative analysis of SMEs across various sectors,including crafts and culinary services,supports the study’s conclusions.The finding reveals a significant gap between government’s training programs and the digital literacy of SMEs as well as a lack of affordable technological resources which could impede the full realization of digital benefits.Strengthening digital technology maturity among SMEs is essential for enhancing their competitiveness and long-term sustainability,yielding both financial and non-financial benefits.This also contributes to find out digital literacy gaps,impact on competitiveness and sustainability,policy and stakeholder recommendations,and government action.These insights offer valuable guidance for policymakers and stakeholders striving to support the digital transformation of SMEs in similar settings.The study also sheds light on digital literacy gaps,their impact on competitiveness and offers policy recommendations for government and stakeholders to address these challenges such as through government and community collaboration. 展开更多
关键词 digital technology maturity SMES sustainable tourism creative economy
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Role of preservation conditions on enrichment and fluidity maintenance of medium to high maturity lacustrine shale oil
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作者 ZHAO Wenzhi LIU Wei +9 位作者 BIAN Congsheng LIU Xianyang PU Xiugang LU Jiamin LI Yongxin LI Junhui LIU Shiju GUAN Ming FU Xiuli DONG Jin 《Petroleum Exploration and Development》 2025年第1期1-16,共16页
In addition to the organic matter type,abundance,thermal maturity,and shale reservoir space,the preservation conditions of source rocks play a key factor in affecting the quantity and quality of retained hydrocarbons ... In addition to the organic matter type,abundance,thermal maturity,and shale reservoir space,the preservation conditions of source rocks play a key factor in affecting the quantity and quality of retained hydrocarbons in source rocks of lacustrine shale,yet this aspect has received little attention.This paper,based on the case analysis,explores how preservation conditions influence the enrichment of mobile hydrocarbons in shale oil.Research showns that good preservation conditions play three key roles.(1)Ensure the retention of sufficient light hydrocarbons(C_(1)–C_(13)),medium hydrocarbons(C_(14)–C_(25))and small molecular aromatics(including 1–2 benzene rings)in the formation,which enhances the fluidity and flow of shale oil;(2)Maintain a high energy field(abnormally high pressure),thus facilitating the maximum outflow of shale oil;(3)Ensure that the retained hydrocarbons have the miscible flow condition of multi-component hydrocarbons(light hydrocarbons,medium hydrocarbons,heavy hydrocarbons,and heteroatomic compounds),so that the heavy hydrocarbons(C_(25+))and heavy components(non-hydrocarbons and asphaltenes)have improved fluidity and maximum flow capacity.In conclusion,in addition to the advantages of organic matter type,abundance,thermal maturity,and reservoir space,good preservation conditions of shale layers are essential for the formation of economically viable shale oil reservoirs,which should be incorporated into the evaluation criteria of shale oil-rich areas/segments and considered a necessary factor when selecting favorable exploration targets. 展开更多
关键词 medium-to-high maturity lacustrine shale oil mobile hydrocarbon enrichment preservation conditions stratum energy field miscible hydrocarbon component retained hydrocarbon fluidity Songliao Basin Ordos Basin Junggar Basin Bohai Bay Basin
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“Component flow”conditions and its effects on enhancing production of continental medium-to-high maturity shale oil 被引量:3
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作者 ZHAO Wenzhi BIAN Congsheng +8 位作者 LI Yongxin LIU Wei QIN Bing PU Xiugang JIANG Jianlin LIU Shiju GUAN Ming DONG Jin SHEN Yutan 《Petroleum Exploration and Development》 SCIE 2024年第4期826-838,共13页
Based on the production curves,changes in hydrocarbon composition and quantities over time,and production systems from key trial production wells in lacustrine shale oil areas in China,fine fraction cutting experiment... Based on the production curves,changes in hydrocarbon composition and quantities over time,and production systems from key trial production wells in lacustrine shale oil areas in China,fine fraction cutting experiments and molecular dynamics numerical simulations were conducted to investigate the effects of changes in shale oil composition on macroscopic fluidity.The concept of“component flow”for shale oil was proposed,and the formation mechanism and conditions of component flow were discussed.The research reveals findings in four aspects.First,a miscible state of light,medium and heavy hydrocarbons form within micropores/nanopores of underground shale according to similarity and intermiscibility principles,which make components with poor fluidity suspended as molecular aggregates in light and medium hydrocarbon solvents,such as heavy hydrocarbons,thereby decreasing shale oil viscosity and enhancing fluidity and outflows.Second,small-molecule aromatic hydrocarbons act as carriers for component flow,and the higher the content of gaseous and light hydrocarbons,the more conducive it is to inhibit the formation of larger aggregates of heavy components such as resin and asphalt,thus increasing their plastic deformation ability and bringing about better component flow efficiency.Third,higher formation temperatures reduce the viscosity of heavy hydrocarbon components,such as wax,thereby improving their fluidity.Fourth,preservation conditions,formation energy,and production system play important roles in controlling the content of light hydrocarbon components,outflow rate,and forming stable“component flow”,which are crucial factors for the optimal compatibility and maximum flow rate of multi-component hydrocarbons in shale oil.The component flow of underground shale oil is significant for improving single-well production and the cumulative ultimate recovery of shale oil. 展开更多
关键词 continental facies pure shale type shale oil medium-to-high maturity shale oil micro-nanopores multi-component hydrocarbons component flow similarity and intermiscibility molecular aggregate
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Neurovascular unit on a chip:the relevance and maturity as an advanced in vitro model
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作者 Sujey Palma-Florez Anna Lagunas Mònica Mir 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第6期1165-1166,共2页
The brain is a high-energy demanding organ,consuming around 20%of the metabolic energy generated.To fulfill this demand,cerebral blood flow(CBF)supplies oxygen and glucose continuously through the intricate network of... The brain is a high-energy demanding organ,consuming around 20%of the metabolic energy generated.To fulfill this demand,cerebral blood flow(CBF)supplies oxygen and glucose continuously through the intricate network of cerebral blood vessels.Although for many years brain activity and blood flow were conceived as independent processes,MRI-based functional brain imaging demonstrated that there is a coupling between them. 展开更多
关键词 CEREBRAL maturity consuming
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Correlation analysis of interstitial maturity and prognosis of colorectal cancer:Meta-analysis
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作者 Zhen-Jun Liu Xu-Wen Zhang +1 位作者 Qi-Qi Liu Shao-Zhao Wang 《World Journal of Gastrointestinal Oncology》 SCIE 2024年第6期2816-2825,共10页
BACKGROUND To investigate the relationship between interstitial maturity and prognosis of colorectal cancer.AIM To examine the correlation between interstitial maturity and the prognosis of colorectal cancer.METHODS T... BACKGROUND To investigate the relationship between interstitial maturity and prognosis of colorectal cancer.AIM To examine the correlation between interstitial maturity and the prognosis of colorectal cancer.METHODS The paper database PubMed,EMBASE,Cochranelibrary,Springerlink,CNKI,and Wanfang database were searched until December 2023."tumor stroma maturity""desmoplastic stroma reaction""desmoplastic reaction""stroma reaction""degree of stroma reaction""stroma classification""stroma density""colorectal cancer""colon cancer""rectal cancer""prognosis"were searched for the search terms.Two system assessors independently screened the literature quality according to the inclusion exclusion criteria,Quality evaluation and data extraction were performed for the included literatures,and meta-analysis was performed for randomized control trials included at using Review Manager 5.2 software.RESULTS Finally,data of 9849 patients with colorectal cancer from 19 cosets in 15 literatures were included,including 4339 patients with mature type(control group),3048 patients with intermediate type(intermediate group)and 2456 patients with immature type(immature group).The results of meta-analysis showed:Relapse-free survival[hazard ratio(HR)=2.66,95%confidence interval(CI):2.30-3.08;P<0.00001],disease-free survival(HR=3.68,95%CI:2.33-5.81;P<0.00001)and overall survival(HR=1.70,95%CI:1.53-1.87;P<0.00001)were significantly lower than those in mature group(control group);relapse-free survival(HR=1.36,95%CI:1.17-1.59;P<0.0001)and disease-free survival rate(HR=1.85,95%CI:1.53-2.24;P<0.0001)was significantly lower than the mature group(control group).CONCLUSION There is the correlation between tumor interstitial maturity and survival prognosis of colorectal cancer,and different degrees of tumor interstitial maturity have a certain impact on the quality of life of colorectal cancer patients. 展开更多
关键词 Colorectal tumor Survival prognosis Tumor interstitial maturity Systematic review META-ANALYSIS
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Estimation of Peanut Maturity Using Color Image Analysis
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作者 Wei-Zhen Liang Kendall R. Kirk +1 位作者 James S. Thomas Andrew C. Warner 《American Journal of Plant Sciences》 CAS 2024年第8期617-635,共19页
Peanuts pods grow underground and mature unevenly, resulting that choosing the correct time to harvest is more complicated than other crops. Pod maturity can be determined by blasting with a pressure washer to remove ... Peanuts pods grow underground and mature unevenly, resulting that choosing the correct time to harvest is more complicated than other crops. Pod maturity can be determined by blasting with a pressure washer to remove outer skin of the pod (exocarp) to expose the color of the middle layer (mesocarp). The mesocarp color changes with maturity from white to yellow, orange, brown and finally black. The sum of percentage from orange, brown, and black mesocarp (OBB) color and black color (BL) represents the kernels that are mature enough to harvest. The goal of this research is to identify methodologies to estimate OBB and BL of the pods using RGB images taken in the field and validate the proposed model using other pod images. The Mahalanobis distance classification method was used to process sets of images and calculate pod area (number of pixels) corresponding to two classes (mesocarp and background) with nine different color groups. The results showed a performance of 94% effectiveness for mesocarp using Mahalanobis distance classification. Statistical regression for OBB and BL was developed based on 315 images of peanut pods taken from the field. The R2 and root mean square error of predicted and actual OBB were 0.93 and 4.1%, respectively. The R2 and root mean square error of predicted and actual BL were 0.88 and 1.8%, respectively. The validation of OBB using other images provided reasonable estimation (R2 = 0.98 and RMSE = 2.73%). This study introduces a novel, cost-effective, and non-destructive method for estimating peanut maturity using RGB imagery and Mahalanobis distance classification in the field. This innovative approach addresses the limitations of traditional methods and offers a robust alternative for real-time maturity assessment. 展开更多
关键词 Peanut maturity MESOCARP EXOCARP Mahalanobis Distance Statistical Regression
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Studies of the Variability of Primary Metabolites in the Epicarp, Mesocarp and Seed of Dacryodes edulis Fruit at Taste Maturity
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作者 Etou Ossibi Grace Jokael Mbon Nguékou Chrichina +2 位作者 Ongouya Mouekouba Dalcantara Liana Mpika Joseph Attibayeba   《Advances in Biological Chemistry》 CAS 2024年第2期64-72,共9页
The fruits of Dacryodes edulis are rich in biologically active substances, which makes them of great interest in terms of validation. In this study, we targeted the primary metabolites in the epicarp, the mesocarp and... The fruits of Dacryodes edulis are rich in biologically active substances, which makes them of great interest in terms of validation. In this study, we targeted the primary metabolites in the epicarp, the mesocarp and the seed of the fruit of Dacryodes edulis at taste maturity, which were selected for their nutritional quality and its appreciation throughout the Gulf of Guinea area, which is very popular because of its large size, texture and special taste. The evaluation of total carbohydrates, total lipids and soluble proteins in the epicarp, mesocarp and seed of the fruit at taste maturity was made from spectrophotometer measurements. The overall analysis of the results of the present study shows that total carbohydrates, total lipids and proteins accumulate more in the seed with respectively 251.33 ± 1.15 mg/g DM;9.92 ± 0.201 mg/g DM and 55.075 ± 0.024 mg/g DM. Likewise, the results indicate low concentrations of total carbohydrates and total lipids in the epicarp with respectively 245 ± 1 mg/g DM and 4.77 ± 0.047 mg/g DM, on the other hand, it is the mesocarp which presents the lowest content of soluble proteins: 28.075 ± 3.231 mg/g DM. This variation could be linked to the nature of the compartment, more particularly to the storage location. This comparative study could lead to the valorization of the seed of the fruit of Dacryodes edulis for its richness in metabolites and arouse significant interest in nutrition. 展开更多
关键词 Dacryodes edulis FRUIT Taste maturity Epicarp MESOCARP SEED
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A Proposed Approach for Measuring Maturity Level of Software Delivery
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作者 Osama Hassan Mansour Atef Raslan Nagy Ramadan 《Journal of Software Engineering and Applications》 2024年第5期228-245,共18页
Software delivery is vital for modern organizations, driving innovation and competitiveness. Measuring an organization’s maturity in software delivery is crucial for efficiency and quality. The Capability Maturity Mo... Software delivery is vital for modern organizations, driving innovation and competitiveness. Measuring an organization’s maturity in software delivery is crucial for efficiency and quality. The Capability Maturity Model (CMM) framework provides a roadmap for improvement but assessing an organization’s CMM Level is challenging. This paper offers a quantitative approach tailored to the CMM framework, using Goal-Question-Metric (GQM) frame-works for each key process area (KPA). These frameworks include metrics and questions to compute maturity scores effectively. The study also refines practices into questions for a thorough assessment. The result is an Analysis Matrix that calculates weighted scores and an overall maturity score. This approach helps organizations assess and enhance their software delivery processes systematically, aiming for improved practices and growth. 展开更多
关键词 CMM CMMI Software Delivery maturity KPAs GQM PRACTICES
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A reverse biomarker-derived maturity trend in Triassic Yanchang Formation shales from the Ordos Basin in China
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作者 Xiaoliang Chen Haiping Huang +6 位作者 Mingming Yan Bin Zhang Wei Wang Zhiguo Mao Dehao Bai Dahai Zhao Qihao Li 《Natural Gas Industry B》 2024年第5期496-510,共15页
Organic-rich shales from the Triassic Yanchang Formation in the Ordos Basin in China are mainly derived from aquatic organisms with type II kerogen.A reverse maturity trend,derived from the commonly used biomarker mat... Organic-rich shales from the Triassic Yanchang Formation in the Ordos Basin in China are mainly derived from aquatic organisms with type II kerogen.A reverse maturity trend,derived from the commonly used biomarker maturity parameter Ts/(Ts+Tm)occurs in the depth profiles of the Chang 7_(3) submember and the Chang 8 member.In contrast,maturity proxies derived from aromatic compounds show a normal sequence for more deeply buried Chang 8 samples exhibiting higher maturity levels,as expected.To explain the abnormal phenomenon,multiple controlling factors—including the paleoredox condition,water salinity,the clay mineral content and composition,biodegradation,the primary migration fractionation effect,and organofacies—are considered.It was found that organofacies BC(HIo=400-250)appear in the Chang 8 samples,while organofacies B(HIo=400-650)appear in the Chang 7_(3) submember.The results suggest that variation in organofacies has a significant impact on Ts/(Ts+Tm)values,even for samples with the same kerogen type and similar source input,and is primarily responsible for the reverse maturity trend in the depth profiles. 展开更多
关键词 Organic-rich shales Ts/(Ts+Tm) maturity indicator Organofacies Ordos basin
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Exploration of the Maturity Evaluation of College Students’Innovation and Entrepreneurship Projects Based on Computer Database Technology
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作者 Shuai Yuan 《Journal of Electronic Research and Application》 2024年第6期89-95,共7页
The college innovation and entrepreneurship program is a powerful means to enhance students’innovation and entrepreneurship skills.Evaluating the maturity of innovation and entrepreneurship projects can stimulate stu... The college innovation and entrepreneurship program is a powerful means to enhance students’innovation and entrepreneurship skills.Evaluating the maturity of innovation and entrepreneurship projects can stimulate students’enthusiasm and initiative to participate.Utilizing computer database technology for maturity evaluation can make the process more efficient,accurate,and convenient,aligning with the needs of the information age.Exploring strategies for applying computer database technology in the maturity evaluation of innovation and entrepreneurship projects offers valuable insights and directions for developing these projects,while also providing strong support for enhancing students’innovation and entrepreneurship abilities. 展开更多
关键词 DATABASE Innovation and entrepreneurship projects maturity evaluation
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Re-Establishing the Merits of Thermal Maturity and Petroleum Generation Multi-Dimensional Modeling with an Arrhenius Equation Using a Single Activation Energy 被引量:4
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作者 David A.Wood 《Journal of Earth Science》 SCIE CAS CSCD 2017年第5期804-834,共31页
Thermal maturation and petroleum generation modeling of shales is essential for suc- cessful exploration and exploitation of conventional and unconventional oil and gas plays. For basin- wide unconventional resource p... Thermal maturation and petroleum generation modeling of shales is essential for suc- cessful exploration and exploitation of conventional and unconventional oil and gas plays. For basin- wide unconventional resource plays such modeling, when well calibrated with direct maturity meas- urements from wells, can characterize and locate production sweet spots for oil, wet gas and dry gas. The transformation of kerogen to petroleum is associated with many chemical reactions, but models typically focus on first-order reactions with rates determined by the Arrhenius Equation. A miscon- ception has been perpetuated for many years that accurate thermal maturity modeling of vitrinite re- flectance using the Arrhenius Equation and a single activation energy, to derive a time-temperature index (~TTIARa), as proposed by Wood (1988), is flawed. This claim was initially made by Sweeney and Burnham (1990) in promoting their "EasyRo" method, and repeated by others. This paper dem- onstrates through detailed multi-dimensional burial and thermal modeling and direct comparison of the ~TTIARR and "EasyRo" methods that this is not the case. The ~TTIA^R method not only provides a very useful and sensitive maturity index, it can reproduce the calculated vitrinite reflectance values derived from models based on multiple activation energies (e.g., "EasyRo"). Through simple expres- sions the ~TTIAaa method can also provide oil and gas transformation factors that can be flexibly scaled and calibrated to match the oil, wet gas and dry gas generation windows. This is achieved in a more-computationally-efficient, flexible and transparent way by the ~TTIARR method than the "EasyRo" method. Analysis indicates that the "EasyRo" method, using twenty activation energies and a constant frequency factor, generates reaction rates and transformation factors that do not realisti- cally model observed kerogen behaviour and transformation factors over geologic time scales. 展开更多
关键词 time-temperature maturity index kerogen activation energies kerogen reaction rates multi-dimensional thermal maturity models petroleum generation versus vitrinite reflectance burial/ thermal history analysis.
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Growth and maturity of Chiromantes dehaani in the Dazhi River estuary
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作者 韩莎 管卫兵 《Marine Science Bulletin》 CAS 2013年第1期51-65,共15页
Chiromantes dehaani, as one of the dominant species in intertidal regions of the Yangtze estuary, plays an important role in the ecosystem. To study allometry and maturity in different phases, morphological data had b... Chiromantes dehaani, as one of the dominant species in intertidal regions of the Yangtze estuary, plays an important role in the ecosystem. To study allometry and maturity in different phases, morphological data had been collected from October in 2009 to September in 2010. Morphologic data such as carapace, cheliped and abdomen were processed by cluster and piecewise linear regression analyses. Discriminat function and logistic curves were built to determine different phases and sizes at 50% maturity, respectively. The results showed that the cheliped width in males and abdomen width in females both presented obvious allometry. The sizes of 50% morphometric maturity occurred at 16.36 mm and 18.22 mm carapace width in males and females, respectively. The life history of males could be divided into three phases while that of females only had two phases according to different growth rates. A significant change in allometry of juvenile males with a break point was detected at 11.78 mm carapace width; carapace width of juvenile and adult females overlapped in a range of 13.04 - 18.64 mm. The crabs attained 50% physiological maturity at the size of 17.50 mm and 17.20 mm for females and males, respectively. For male, the size of morphological maturity was larger than that of physiological maturity, which was opposite to that of female. 展开更多
关键词 Chiromantes dehaani cheliped ABDOMEN allometric growth morphological maturity physiological maturity
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Effects of Ploughing Astragalus sinicus at Maturity Stage on Rice Yield and Soil Properties of Paddy Field
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作者 王伯诚 赖小芳 +2 位作者 陈银龙 项玉英 陈剑 《Agricultural Science & Technology》 CAS 2013年第12期1792-1796,1803,共6页
[Objective] The effects of ploughing Astragalus sinicus at maturity stage as green manure on paddy soil properties were studied to provide references for ad- vancing the green manure production and field sustainable d... [Objective] The effects of ploughing Astragalus sinicus at maturity stage as green manure on paddy soil properties were studied to provide references for ad- vancing the green manure production and field sustainable development. [Methods] A three-year field positioning experiment was carried out. In the first year, five differ- ent levels (0, 2.81, 5.61, 8.42, 11.23 t/hm~) of Astragalus sinicus ploughed at matu- rity stage were designed. And in the next two years, the amounts of ploughed As- tragalus sinicus at maturity stage were based on the natural growth amounts of As- tragalus sinicus at maturity stage of the former year in each plot field. The yields of Astragalus sinicus at maturity stage were estimated and ploughed directly before rice transplanting. Rice yield, soil nutrients, biological properties and water-stable aggre- gates of paddy fields were measured as well. [Results] The effective panicles and rice yields increased significantly after ploughing Astragalus sinicus at maturity stage. Meanwhile, the organic acid content in paddy field increased and the activities of soil phosphatases, invertase and catalase were higher. The soil dissolved organic carbon also increased with the increasing application of green manure. However, excess amount of green manure inhibited the soil microbial biomass carbon content. The macro aggregates and micro aggregates gathered to middle aggregates. [Conclusion] As green manure, the use of Astragalus sinicus at maturity stage could improve soil physiochemical and biological properties, improve soil fertility and increase rice yield significantly. But the ploughing amount of Astragalus sinicus at maturity stage before rice transplanting should be less than 8.42 t/hm2 (dry weight. 展开更多
关键词 Astragalus sinicus at maturity stage PLOUGHING Rice yield Paddy soil nutrients Soil properties
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Synergistic Effects of Nitric Oxide and Harvest Maturity on Quality of Honey Peach during Cold Storage
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作者 胡花丽 李鹏霞 +1 位作者 王毓宁 李志强 《Agricultural Science & Technology》 CAS 2013年第4期549-553,共5页
In this study, peaches of cv. 'Sui Yuan' with different maturities were treated with 0.05 mM sodium nitroprusside (SNP), a nitric oxide donor, for 5 min, at 28℃, and then stored at 0-1.5℃ for 30 days. Untreated ... In this study, peaches of cv. 'Sui Yuan' with different maturities were treated with 0.05 mM sodium nitroprusside (SNP), a nitric oxide donor, for 5 min, at 28℃, and then stored at 0-1.5℃ for 30 days. Untreated fruits stored under the same conditions were used as control fruits in the experiment. The browning level, activities of polyphenol oxidase (PPO), peroxydase (POD) and superoxide dismutase (SOD), and quality parameters (firmness, titratable acid, total soluble solids and total sugar) were analyzed. The results showed that the firmness of SNP-treated fruit at different stage of maturity were higher than that of the control fruit after storage for 30 days. However, no significant effect was found on total soluble solid content. The titratable acid content of low maturity fruit was higher in SNP-treated one than that of the control, but the titratable acid content of high maturity fruit treated by SNP was lower than that of the control on 10th and 30th day. In addition, the combination of SNP treatment and high maturity resulted in higher activities of SOD, lower activity of PPO and POD, lower browning level. Therefore, the combination of high maturity and SNP treatment might be a useful method to well maintain honey peach fruit quality during cold storage. 展开更多
关键词 Honey peach Harvest maturity Sodium nitroprusside treatment QUALITY
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DEBT MATURITY STRUCTURE IN PROJECT FINANCING
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作者 黄福广 《Transactions of Tianjin University》 EI CAS 2001年第4期261-264,共4页
Based on the concept of debt duration,this paper proposes the elasticity of cash flow.Then,the debt maturity structure in project financing is discussed.The results show that in the project financing structure,the deb... Based on the concept of debt duration,this paper proposes the elasticity of cash flow.Then,the debt maturity structure in project financing is discussed.The results show that in the project financing structure,the debt maturity structure is closely related with debt capacity.Higher debt ratio requires short term debt,and vise versa. 展开更多
关键词 project financing debt maturity structure DURATION debt ratio
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Emma's Growth from Innocence to Maturity
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作者 周道凤 《海外英语》 2013年第21期245-247,共3页
Emma is one of the most successful novels by Jane Austen.This thesis analyzed the background of its heroine Emma’s growth background,her growth from conceit,snobbery,domination to maturity,and the causes of her chara... Emma is one of the most successful novels by Jane Austen.This thesis analyzed the background of its heroine Emma’s growth background,her growth from conceit,snobbery,domination to maturity,and the causes of her character transformation.Her psychological growth process from innocence to maturity demonstrates women’s growth and progress in the early 19th cen tury,and inspires modern women to gradually improve in personality and better present their charms of maturity. 展开更多
关键词 EMMA GROWTH INNOCENCE maturity
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Curing Characteristics and Suitable Harvest Maturity of Fresh Flue-cured Tobacco Leaves in Ankang Tobacco Growing Areas 被引量:2
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作者 朱峰 饶智 +3 位作者 沈始权 孙福山 任杰 肖头杰 《Agricultural Science & Technology》 CAS 2015年第4期815-819,共5页
CuItivars K326, Yunyan 87 and Guiyan 4 were used to investigate the curing characteristics and suitabIe harvest maturity of fresh fIue-cured tobacco Ieaves in Ankang tobacco growing areas. ResuIts indicated that the w... CuItivars K326, Yunyan 87 and Guiyan 4 were used to investigate the curing characteristics and suitabIe harvest maturity of fresh fIue-cured tobacco Ieaves in Ankang tobacco growing areas. ResuIts indicated that the water Ioss of K326 was sIow,and the Ieaves were resistant to curing and reIative easiIy to cure. The water Ioss of Yunyan 87 and Guiyan 4 were quick, and the Ieaves with normal resistance to curing were reIative difficuIt to cure. For Guiyan 4, the shrinkage of CM1 maturity was the Iargest. For K326 and Yunyan 87, the shrinkages of CM2 maturity were the Iargest whiIe the shrinkage of CM1 maturity was the Iowest, but the difference did not reach statistical significance. The proportion of top-middIe-grade tobacco Ieaves and average price for K326 were the highest with XM2, CM2 and BM2 maturity, and for Yunyan 87 were XM1, CM3 and BM2 maturity. For K326, Ieaves with XM2, CM2 and BM2 maturity showed the balanced chemical components and the best smoking quality. 展开更多
关键词 FIue-cured tobacco Curing characteristic maturity Ankang City of Shaanxi Province
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Microbiological parameters and maturity degree during composting of Posidonia oceanica residues mixed with vegetable wastes in semi-arid pedo-climatic condition 被引量:35
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作者 SAIDI Neyla KOUKI Soulwene +4 位作者 M'HIRI Fadhel JEDIDI Naceur MAHROUK Meriam HASSEN Abdennaceur OUZARI Hadda 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第10期1452-1458,共7页
The aim of this study was to characterize the biological stability and maturity degree of compost during a controlled pile-composting trial of mixed vegetable residues (VR) collected from markets of Tunis City with ... The aim of this study was to characterize the biological stability and maturity degree of compost during a controlled pile-composting trial of mixed vegetable residues (VR) collected from markets of Tunis City with residues of Posidonia oceanica (PoR), collected from Tunis beaches. The accumulation in beaches (as well as their removal) constitutes a serious environmental problem in all Mediterranean countries particularly in Tunisia. Aerobic-thermophilic composting is the most reasonable way to profit highly-valuable content of organic matter in these wastes for agricultural purposes. The physical, chemical, and biological parameters were monitored during composting over 150 d. The most appropriate parameters were selected to establish the maturity degree. The main result of this research was the deduction of the following maturity criterion: (a) C/N ratio 〈 15; (b) NH4^+-N 〈 400 mg/kg; (c) CO2-C 〈 2000 mg CO2-C/kg; (d) dehydrogenase activity 〈 1 mg TPF/g dry matter; (e) germination index (GI) 〉 80%. These five parameters, considered jointly are indicative of a high maturity degree and thus of a high-quality organic amendment which employed in a rational way, may improve soil fertility and soil quality. The mature compost was relatively rich in N (13.0 g/kg), P (4.74 g/kg) and MgO (15.80 g/kg). Thus composting definitively constitutes the most optimal option to exploit these wastes. 展开更多
关键词 soil degradation RECYCLING COMPOSTING organic amendment maturity degree
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