期刊文献+
共找到39,008篇文章
< 1 2 250 >
每页显示 20 50 100
Yield Characteristics of a New High-quality Disease-resistant Wheat Variety Chuanmai 618
1
作者 Jianmin ZHENG Zongjun PU +4 位作者 Jijuan LU Jiangtao LUO Qingyan DENG Peixun LIU Shizhao LI 《Plant Diseases and Pests》 2024年第2期22-26,31,共6页
[Objectives]The paper was to analyze the yield characteristics of a new high-quality disease-resistant wheat variety Chuanmai 618.[Methods]The yield characteristics of Chuanmai 618 were analyzed using the AMMI model a... [Objectives]The paper was to analyze the yield characteristics of a new high-quality disease-resistant wheat variety Chuanmai 618.[Methods]The yield characteristics of Chuanmai 618 were analyzed using the AMMI model and GGE biplot based on data from a 2-year regional test and a 1-year production test.[Results]The analysis of the AMMI model for the 2-year regional test indicated that Chuanmai 618 had a moderate yield and good stability.During the production test,Chuanmai 618 had an average yield of 450.52 kg/666.7 m^(2),an effective spike of 235700 spike/666.7 m^(2),a 1000-seed weight of 47.93 g,and a kernel number per spike of 47.28.The AMMI analysis sequencing graph showed that the varieties were ranked in the following order:Zhongkemai 1816>Chuanmai 618>Shumai 1958>Chuanyu 42>Mianmai 367>Xikemai 5518.According to the GE analysis,Chuanmai 618 had comparative advantages.[Conclusions]The new wheat variety Chuanmai 618 is a high-quality disease-resistant variety with good yield and stability. 展开更多
关键词 Chuanmai 618 high quality Disease-resistant AMMI model high yield STABILITY
下载PDF
Six-Dimensional Guidance: The Strategies of Thinking Quality Cultivation in Senior High School English Discourse Learning
2
作者 Junjie Sun 《Journal of Contemporary Educational Research》 2024年第3期237-245,共9页
Taking the discourse learning of the new senior high school English textbook published by the People’s Education Press as an example,combined with the“six-dimensional guidance”deep reading strategy,and through the ... Taking the discourse learning of the new senior high school English textbook published by the People’s Education Press as an example,combined with the“six-dimensional guidance”deep reading strategy,and through the six-skill training strategies of“memory skill training,understanding skill training,application skill training,analytical skill training,evaluation skill training,creative skill training,”this paper aims to cultivate students’thinking profundity,logic,flexibility,sensitivity,criticality,and originality.It also promotes the real implementation of senior high school English deep reading that points to the cultivation of thinking quality in classroom teaching,and realizes the transformation from“conventional reading”to“deep reading”that reflects the core literacy of the discipline. 展开更多
关键词 Six-dimensional guidance high school English Discourse learning Thinking quality Strategy
下载PDF
Employment Quality EvaluationModel Based on Hybrid Intelligent Algorithm
3
作者 Xianhui Gu Xiaokan Wang Shuang Liang 《Computers, Materials & Continua》 SCIE EI 2023年第1期131-139,共9页
In order to solve the defect of large error in current employment quality evaluation,an employment quality evaluation model based on grey correlation degree method and fuzzy C-means(FCM)is proposed.Firstly,it analyzes... In order to solve the defect of large error in current employment quality evaluation,an employment quality evaluation model based on grey correlation degree method and fuzzy C-means(FCM)is proposed.Firstly,it analyzes the related research work of employment quality evaluation,establishes the employment quality evaluation index system,collects the index data,and normalizes the index data;Then,the weight value of employment quality evaluation index is determined by Grey relational analysis method,and some unimportant indexes are removed;Finally,the employment quality evaluation model is established by using fuzzy cluster analysis algorithm,and compared with other employment quality evaluation models.The test results show that the employment quality evaluation accuracy of the design model exceeds 93%,the employment quality evaluation error can meet the requirements of practical application,and the employment quality evaluation effect is much better than the comparison model.The comparison test verifies the superiority of the model. 展开更多
关键词 employment quality fuzzy c-means clustering algorithm grey correlation analysis method evaluation model index system comparative test
下载PDF
Analysis of the Factors Affecting the Employment Quality of College Graduates:A Case Study of China
4
作者 ZHOU Mingyang 《Psychology Research》 2023年第8期357-365,共9页
The employment quality of college graduates in China is a topic of widespread concern.This paper uses authoritative data sources,including the China Labor Statistics Yearbook,China Statistical Yearbook,and data from p... The employment quality of college graduates in China is a topic of widespread concern.This paper uses authoritative data sources,including the China Labor Statistics Yearbook,China Statistical Yearbook,and data from provincial statistical bureaus,to examine the employment quality of college graduates in different regions of China.Specifically,the paper explores three aspects:salary level,job intensity,and job stability.The research results indicate that undergraduate graduates experience lower job intensity than college counterparts.However,while North,East,and South China show high salary levels and job stability,issues such as high work intensity,high cost of living,and small living space exist.Therefore,this paper offers policy development recommendations to promote job market reform and improve employment quality.These recommendations aim to address the challenges faced by college graduates in various regions of China and to promote the stability of the country’s social and economic development.By examining the employment quality of college graduates in different regions of China,this paper provides valuable insights for scholars,policymakers,and practitioners. 展开更多
关键词 employment quality college graduates salary level work intensity work stability
下载PDF
Thoughts on Promoting High-Quality Employment of Students Based on School-Enterprise Cooperation
5
作者 Yanchao Wang 《Journal of Contemporary Educational Research》 2020年第6期64-68,共5页
The effective operation of school-enterprise cooperation is of great strategic significance to promote college students to achieve employment of high-quality.Therefore,this paper will make a detailed discussion on the... The effective operation of school-enterprise cooperation is of great strategic significance to promote college students to achieve employment of high-quality.Therefore,this paper will make a detailed discussion on the effect that school-enterprise cooperation accelerates college students to achieve employment in good quality,hoping that it can provide the necessary guidance information to the researchers in this field. 展开更多
关键词 School-enterprise cooperation PROMOTION employment in good quality of students
下载PDF
Study on the Employment-oriented Teaching Quality Management System of Higher Vocational Colleges
6
作者 Zhe JI 《International Journal of Technology Management》 2015年第9期87-89,共3页
关键词 质量管理体系 高职院校 教学 就业导向 核心竞争力 质量保证
下载PDF
Exploration and Research on Employment Guidance System in Universities from the Perspective of Artificial Intelligence 被引量:1
7
作者 Wentian Cao Xueer Ye Xiaoying Chen 《Open Journal of Applied Sciences》 2023年第6期934-940,共7页
In the context of the era of continuous development of artificial intelligence, the labor value of university students is impacted by technological substitution. Simultaneously, university students are also required t... In the context of the era of continuous development of artificial intelligence, the labor value of university students is impacted by technological substitution. Simultaneously, university students are also required to constantly update their skills. All of the above will be the challenge of university students’  employment prospects. However, artificial intelligence will also bring new opportunities, which will stimulate the innovation ability of university students and bring new directions for employment. In order to better cope with the possible impact of artificial intelligence, universities should incorporate employment guidance services into the “three-wide education” system. To achieve this, universities need to take the following measures: developing the dynamic monitoring system of university employment based on big data, constructing the employment guidance curriculum system of university students throughout the whole process, updating the mode of diversified employment guidance service as well as establishing a team of employment guidance teachers keeping pace with the times. These measures aim to better adapt to the job market demands in the context of artificial intelligence, guide students to actively respond to the possible impact of artificial intelligence technology, cultivate their core competencies and qualities that are less likely to be replaced by artificial intelligence, and promote the high-quality employment of university students. 展开更多
关键词 employment Guidance Artificial Intelligence high quality employment University Students
下载PDF
Irrigating with cooler water does not reverse high temperature impact on grain yield and quality in hybrid rice
8
作者 Wanju Shi Xinzhen Zhang +8 位作者 Juan Yang Somayanda M.Impa De Wang Yusha Lai Zijin Yang Hang Xu Jinshui Wu Jianhua Zhang S.V.Krishna Jagadish 《The Crop Journal》 SCIE CSCD 2023年第3期904-913,共10页
Rice grain yield and quality are negatively impacted by high temperature stress.Irrigation water temperature significantly affects rice growth and development,thus influencing yield and quality.The role of cooler irri... Rice grain yield and quality are negatively impacted by high temperature stress.Irrigation water temperature significantly affects rice growth and development,thus influencing yield and quality.The role of cooler irrigation water in counteracting high temperature induced damages in rice grain yield and quality are not explored.Hence,in the present study two rice hybrids,Liangyoupeijiu(LYPJ)and IIyou 602(IIY602)were exposed to heat stress and irrigated with water having different temperatures in a splitsplit plot experimental design.The stress was imposed starting from heading until maturity under field-based heat tents,over two consecutive years.The maximum day temperature inside the heat tents was set at 38℃.For the irrigation treatments,two different water sources were used including belowground water with cooler water temperature and pond water with relatively higher water temperature.Daytime mean temperatures in the heat tents were increased by 1.2–2.0℃ across two years,while nighttime temperature remained similar at both within and outside the heat tents.Cooler belowground water irrigation did have little effect on air temperature at the canopy level but decreased soil temperature(0.2–1.4℃)especially under control.Heat stress significantly reduced grain yield(33%to 43%),panicles m^(-2)(9%to 10%),spikelets m^(-2)(15%to 22%),grain-filling percentage(13%to 26%)and 1000-grain weight(3%to 5%).Heat stress significantly increased chalkiness and protein content and decreased grain length and amylose content.Grain yield was negatively related to air temperature at the canopy level and soil temperature.Whereas grain quality parameters like chalkiness recorded a significantly positive association with both air and soil temperatures.Irrigating with cooler belowground water reduced the negative effect of heat stress on grain yield by 8.8%in LYPJ,while the same effect was not seen in IIY602,indicating cultivar differences in their response to irrigation water temperature.Our findings reveal that irrigating with cooler belowground water would not significantly mitigate yield loss or improve grain quality under realistic field condition.The outcome of this study adds to the scientific knowledge in understanding the interaction between heat stress and irrigation as a mitigation tool.Irrigation water temperature regulation at the rhizosphere was unable to counteract heat stress damages in rice and hence a more integrated management and genetic options at canopy levels should be explored in the future. 展开更多
关键词 Grain quality Grain yield Hybrid rice high temperature IRRIGATION Water management
下载PDF
Translocation and Distribution of Carbon-Nitrogen in Relation to Rice Yield and Grain Quality as Affected by High Temperature at Early Panicle Initiation Stage
9
作者 JI Dongling XIAO Wenhui +8 位作者 SUN Zhiwei LIU Lijun GU Junfei ZHANG Hao Matthew Tom HARRISON LIU Ke WANG Zhiqin WANG Weilu YANG Jianchang 《Rice science》 SCIE CSCD 2023年第6期598-612,共15页
Due to climate change, extreme heat stress events have become more frequent, adversely affecting rice yield and grain quality. The accumulation and translocation of dry matter and nitrogen substances are essential for... Due to climate change, extreme heat stress events have become more frequent, adversely affecting rice yield and grain quality. The accumulation and translocation of dry matter and nitrogen substances are essential for rice yield and grain quality. To assess the impact of high temperature stress(HTS) at the early panicle initiation(EPI) stage on the accumulation, transportation, and distribution of dry matter and nitrogen substances in various organs of rice, as well as the resulting effects on rice yield and grain quality, pot experiments were conducted using an indica rice cultivar Yangdao 6(YD6) and a japonica rice cultivar Jinxiangyu 1(JXY1) under both normal temperature(32 ℃/26 ℃) and high temperature(38 ℃/29 ℃) conditions. The results indicated that exposure to HTS at the EPI stage significantly decreased rice yield by reducing spikelet number per panicle, grain-filling rate, and grain weight. However, it improved the nutritional quality of rice grains by increasing protein and amylose contents. The reduction in nitrogen and dry matter accumulation accounted for the changes in spikelet number per panicle, grain-filling rate, and grain size. Under HTS, the decrease in nitrogen accumulation accompanied by the reduction in dry matter may be due to the down-regulation of leaf net photosynthesis and senescence, as evidenced by the decrease in nitrogen content. Furthermore, the decrease in sink size limited the translocation of dry matter and nitrogen substances to grains, which was closely related to the reduction in grain weight and the deterioration of grain quality. These findings significantly contribute to our understanding of the mechanisms of HTS on grain yield and quality formation from the perspective of dry matter and nitrogen accumulation and translocation. Further efforts are needed to improve the adaptability of rice varieties to climate change in the near future. 展开更多
关键词 rice early panicle initiation stage high temperature stress carbon-nitrogen translocation grain yield grain quality
下载PDF
Breeding of National Authorized New Wheat Variety Shannong 116 and Supporting Cultivation Technical Measures for High Yield, High Quality and High Efficiency
10
作者 Yanxun WANG Jichun TIAN +1 位作者 Ming YANG Li PENG 《Plant Diseases and Pests》 CAS 2023年第3期19-21,26,共4页
Shannong 116 is a strong gluten,high yield and multi-resistance wheat variety bred by Shandong Agricultural University,which was approved by the State in 2021 and by Shandong Province in 2022.Shannong 116 combines the... Shannong 116 is a strong gluten,high yield and multi-resistance wheat variety bred by Shandong Agricultural University,which was approved by the State in 2021 and by Shandong Province in 2022.Shannong 116 combines the excellent characteristics of the female parent(strong gluten,disease resistance and early maturity)and the male parent(high yield,water saving and lodging resistance),with a plant height of 76.9 cm,compact plant type,orderly spike layer and good maturity performance,which is suitable for large-scale promotion and market order planting in Huanghuai wheat area.In this paper,the characteristics of Shannong 116 are analyzed,and cultivation technical measures for high yield,high quality and high efficiency are put forward,in order to provide a technical support for the popularization and application of the variety. 展开更多
关键词 National authorized wheat Shannong 116 BREEDING high yield high quality high efficiency Cultivation measures
下载PDF
Strategies for High-quality Development of Greenhouse Vegetables in Zibo City,Shandong Province
11
作者 Dongwen SUN He ZHU +4 位作者 Bo LI Jiaer XU Xinying YAN Yuxin HE Yu SHI 《Asian Agricultural Research》 2023年第12期21-23,共3页
This investigation report got a clear picture of the general situation of the development of greenhouse vegetable industry in Zibo,and found out the existing problems such as frequent harmful weather,few special varie... This investigation report got a clear picture of the general situation of the development of greenhouse vegetable industry in Zibo,and found out the existing problems such as frequent harmful weather,few special varieties and high-grade varieties of greenhouse vegetables,fragmentation of new technology promotion of greenhouse vegetables,low level of intensive seedling raising of vegetables,backward level of facility planting structure and equipment,etc.This paper puts forward the strategies for the future high-quality development of vegetables:promoting the adjustment of vegetable planting structure,rationally arranging vegetables for rotation,strengthening vegetable technical guidance,and innovating vegetable consumption patterns. 展开更多
关键词 GREENHOUSE VEGETABLES high quality STRATEGIES
下载PDF
Structural characteristics and influencing factors of spatial correlation network for regional high-quality development in China
12
作者 LIU Jian-jun LIU He 《Ecological Economy》 2023年第4期329-343,共15页
On the basis of measuring the regional high-quality development in China from 2011 to 2020,this study uses gravity model to build spatial correlation network,and uses social network analysis method to analyze the stru... On the basis of measuring the regional high-quality development in China from 2011 to 2020,this study uses gravity model to build spatial correlation network,and uses social network analysis method to analyze the structural characteristics and influencing factors of correlation network.The results are shown as follows.First,from 2011 to 2020,the level of regional high-quality development in China is rising gradually,and the discrete characteristics between regions are gradually obvious,showing a step-like distribution structure decreasing from east to west.Second,the network density of regional high-quality development is generally low and tends to decline,but it has strong stability and correlation strength.Third,the spatial correlation network has an obvious core-edge structure.Shanghai is always at the center of the network and plays a significant intermediary role,while Qinghai and Xinjiang are always at the edge of the network.Fourth,the regional high-quality development association network can be divided into four major sectors:main benefit,net benefit,net spillover,and broker,showing the spatial correlation characteristics of inter-plate contact and intra-plate agglomeration.Fifth,the level of economic development,the level of urbanization and geographical proximity have a significant impact on the formation of regional high-quality development correlation network. 展开更多
关键词 high quality development spatial association network influencing factors social network analysis
下载PDF
Effectivity and safety of trifocal intraocular lenses and capsular tension rings implantation for cataract patients with axial high myopia
13
作者 Shan Hua Qiu-Xia Xie +1 位作者 Hu Wang Jing-Xiang Zhong 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2024年第3期499-508,共10页
●AIM:To assess effectivity and safety of trifocal intraocular lenses(IOLs)and capsular tension rings in treating cataract patients with axial high myopia.●METHODS:A prospective nonrandomized controlled clinical tria... ●AIM:To assess effectivity and safety of trifocal intraocular lenses(IOLs)and capsular tension rings in treating cataract patients with axial high myopia.●METHODS:A prospective nonrandomized controlled clinical trial was conducted.Totally 98 eyes(74 patients)who underwent femtosecond laser-assisted cataract surgery(FLACS)with trifocal IOLs were enrolled in the study and followed up for 2y after surgery:46 eyes(33 patients)with capsular tension ring implantation in the long axial lengths(AL)group(26<AL<29 mm)and 52 eyes(41 patients)in the normal AL group(22<AL<24.5 mm).Postoperative outcomes about effectivity and safety,including the subjective and objective visual quality,and postoperative complications were assessed.●RESULTS:Uncorrected distance visual acuity at 5 m and uncorrected intermediate visual acuity at 60 and 80 cm in the long AL group were significantly worse than those in the normal AL group at 3mo postoperatively(P<0.05).The differences in reading speed,spectacle independence and potential visual complaints between the two groups were not statistically significant(P>0.05).The dysfunctional lens index and total modulation transfer function(MTF)average height were similar between the two groups.The postoperative internal coma aberrations in the axial high myopia eyes were significantly higher than that in the normal AL group(P<0.05).The total satisfaction score in the long AL group(91.32±2.76)was slightly higher than that in the normal AL group(90.36±3.47),but there was no difference(P=0.136).A statistically negative correlation was found between corrected distance visual acuity(CDVA)and dysfunctional lens index(r=-0.382,P=0.009),and between CDVA and the total MTF average height(r=-0.374,P=0.01).But there was no significant correlation between CDVA and total satisfaction score(r=0.059,P=0.696).Postoperative complications mainly presented as posterior capsular opacity(PCO),retinal detachment and cystoid macular edema.There was no difference in the incidence of fundus disease(6.5%vs 3.8%,P=0.663)or PCO(17.4%vs 7.7%,P=0.217)between the two groups at two years.●CONCLUSION:The utilization of trifocal IOL and capsular tension ring implantation is beneficial for cataract patients with axial high myopia undergoing FLACS.This approach not only ensures excellent subjective feelings and objective visual quality,but also does not increase the incidence of postoperative complications. 展开更多
关键词 trifocal intraocular lenses capsular tension ring axial high myopia CATARACT visual quality
下载PDF
Correlation between Employment Quality and Skill Training of Land-expropriated Farmers
14
作者 Xiaogang WANG 《Asian Agricultural Research》 2016年第9期11-15,19,共6页
Based on field survey,an empirical analysis was made on the correlation between employment quality and skill training of landexpropriated farmers. The analysis indicated that there are differences in employment opport... Based on field survey,an empirical analysis was made on the correlation between employment quality and skill training of landexpropriated farmers. The analysis indicated that there are differences in employment opportunity,employment sector,employment ability,wage income and employment stability between land-expropriated farmers. Besides,though skill training,it is feasible to effectively improve employment quality of land-expropriated farmers. The skill training exerts a significant effect on employment and urban adaptation of land-expropriated farmers. The mode of skill training promoting employment quality was proposed. Skill training can raise human resource level of land-expropriated farmers,and increase their labor and employment skills,to help them realize regular employment and smoothly become citizens. For fund sources for skill training,government and land expropriation unit should bring into play active role. And skill training should be undertaken under the guidance of government and support of land expropriation unit. 展开更多
关键词 Land-expropriated farmers employment quality Skill training CORRELATION
下载PDF
Nature of Employment and Its Effect on the Quality of Life of Employees in SMTEs in Mombasa County,Kenya
15
作者 Ruth K.Kimaiga Anthony W.Pepela 《Journal of Tourism and Hospitality Management》 2018年第5期248-258,共11页
Tourism is an important economic sector globally contributing to economic development of many countries.Though the tourism sector has been credited with the creation of millions of jobs to populations’worldwide,there... Tourism is an important economic sector globally contributing to economic development of many countries.Though the tourism sector has been credited with the creation of millions of jobs to populations’worldwide,there has been wide-ranging apprehension on its capacity to improve the populaces’quality of life.This study therefore sought to establish whether the nature of jobs created had an influence on quality of life of employees working in the STMES found in Mombasa County,Kenya.A mixed methods research design using the embedded approach was adopted.Primary data was collected using researcher administered semi-structured questionnaires and semi-structured interviews.The target population was the 1572 employees in the SMTEs.Probability Proportional to Size Sampling was used for the SMTEs employees where a total of 464 employees formed the sample size while purposive sampling was used for interview respondents.Linear regression was used to analyse quantitative data while tables were used for data presentation.The nature of employment had a statically significant effect on employees’quality of life(R=0.881;P=0.000;V=0.804).This finding has implications for developing a regulatory framework that would enable SMTEs create productive employment in that,it is a wake-up call to the government to re-look at the implementation of the economic blue print(Vision 2030)and identify functional implementation strategies it can use to ensure its’overall goal of providing a high quality of life for citizens is achieved. 展开更多
关键词 SMTEs NATURE of employment quality of LIFE Productive employment
下载PDF
Evaluation Study on the Level of High-Quality Development of the Construction Industry in Henan Province of China
16
作者 Ximei Kong Zhiyuan Feng 《Open Journal of Applied Sciences》 CAS 2023年第3期366-382,共17页
Based on the data of the construction industry in Henan Province, China, from 2005 to 2020, the high-quality development level of the construction industry in Henan Province is measured. Firstly, this paper constructs... Based on the data of the construction industry in Henan Province, China, from 2005 to 2020, the high-quality development level of the construction industry in Henan Province is measured. Firstly, this paper constructs the indicator system based on the high-quality development theory and the characteristic of the construction industry from seven dimensions: industrial scale, industrial efficiency, industrial benefits, industrial innovation, industrial risk, industrial potential, and the green development of the construction industry. Secondly, using the global principal component analysis (PCA) method to measure the high-quality development level. Thirdly, cluster analysis is applied to measure the relative changes of various dimensions in different stages. The results show that overall the high-quality development level of the construction industry in Henan province is increasing, but different indicators perform differently in various stages, and the changes in real estate policies have a significant impact on this. Finally, based on these findings, we think it is better to reduce real estate dependence, promote the application of new materials and technologies and maintain the stability of real estate policies. 展开更多
关键词 Construction Industry high-quality Development Evaluation
下载PDF
Analyzing the Current Situation of Employment Quality in China
17
作者 Suhua Liu Linlin Shang 《Chinese Business Review》 2006年第3期58-64,共7页
下载PDF
Effect of electromagnetic stirring in mold on the macroscopic quality of high carbon steel billet 被引量:9
18
作者 Haiqi YU Miaoyong ZHU 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2009年第6期461-467,共7页
An industrial plant trial for optimizing the process parameters in a round billet continuous casting mold with electromagnetic stirring (M-EMS) was performed, in which the influences of stirring parameters with M-EM... An industrial plant trial for optimizing the process parameters in a round billet continuous casting mold with electromagnetic stirring (M-EMS) was performed, in which the influences of stirring parameters with M-EMS on the solidification macrostructure of high carbon steel were investigated. The results show that the billet quality is not well controlled under the condition of working current and frequency with EMS, in which the subsurface crack of grade 1.0-2.0 ups to 38.09%, the central pipe of grade 1.0-1.5 reaches to 14.28%, and the central porosity of grade 1.5 is 14.29%. The parameters of current 260 A and frequency 8 Hz as the final optimum scheme has a remarkable effect for improving the macroscopic quality of billet, in which the subsurface crack, central pipe and skin blowhole are all disappeared, and the central porosity and carbon segregation are also well improved. 展开更多
关键词 Round billet continuous casting Electromagnetic stirring in mold Macroscopic quality high carbon steel
下载PDF
Diagenetic Evolution and Formation Mechanisms of High-Quality Reservoirs under Multiple Diagenetic Environmental Constraints:An Example from the Paleogene Beach-Bar Sandstone Reservoirs in the Dongying Depression,Bohai Bay Basin 被引量:5
19
作者 WANG Jian CAO Yingchang +1 位作者 SONG Guoqi LIU Huimin 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2017年第1期232-248,共17页
The diagenetic environment, diagenetic responses, diagenetic transformation model and formation mechanisms of high-quality reservoirs(beach-bar sandstones of the Paleogene fourth member) in the Dongying depression w... The diagenetic environment, diagenetic responses, diagenetic transformation model and formation mechanisms of high-quality reservoirs(beach-bar sandstones of the Paleogene fourth member) in the Dongying depression were studied through the analysis of fluid inclusions, thin section and burial evolution history. The diagenetic fluids of the beach-bar sandstone reservoirs evolved from early high salinity and weak alkalinity to low salinity and strong acidity, late high salinity and strong alkalinity and late low salinity and acidity, which were accompanied by two stages of oil and gas filling. The fluids at the margins of the sandbodies were continuously highly saline and strongly alkaline. The western(eastern) reservoirs experienced early open(closed), middle open, and late closed diagenetic environments during their burial history. The flow pattern was characterized by upwelling during the majority of the diagenesis(in the east, a non-circulating pattern transitioned into an upwelling current). Due to the evolution of the diagenetic fluids, the diagenetic sequence of the beach-bar reservoirs was as follows: early weak carbonate cementation; feldspar and carbonate cement dissolution and authigenic quartz cementation; late carbonate and anhydrite cementation, authigenic feldspar cementation, and late quartz dissolution; and late carbonate cementation, feldspar dissolution, and authigenic quartz cementation. The diagenetic strength during these stages varied or was absent altogether in different parts of the reservoirs. Due to the closeness of the diagenetic environment and the flow pattern of the diagenetic fluids, the diagenetic products are variably distributed in the sandstones interbedded with mudstones and in the fault blocks. The evolution of multiple alternating alkaline and acidic diagenetic environments controlled the distribution patterns of the reservoir diagenesis and reservoir space, and the reservoir quality index, RQI, increased gradually from the margins to the centers of the sandstones. The closeness of the diagenetic environment and the flow patterns of the diagenetic fluids controlled the differences in the reservoir properties among the fault blocks. With increasing distance from the oil-source faults, the RQI values in the west gradually decreased and in the east initially increased and then decreased. 展开更多
关键词 diagenetic environment DIAGENESIS diagenetic fluids beach-bar high quality reservoir Dongying depression
下载PDF
From prolonging life to prolonging working life: Tackling unemployment among liver-transplant recipients 被引量:2
20
作者 Fredrik Aberg 《World Journal of Gastroenterology》 SCIE CAS 2016年第14期3701-3711,共11页
Return to active and productive life is a key goal of modern liver transplantation(LT). Despite marked improvements in quality of life and functional status, a substantial proportion of LT recipients are unable to res... Return to active and productive life is a key goal of modern liver transplantation(LT). Despite marked improvements in quality of life and functional status, a substantial proportion of LT recipients are unable to resume gainful employment. Unemployment forms a threat to physical and psychosocial health, and impairs LT cost-utility through lost productivity. In studies published after year 2000, the average postLT employment rate is 37%, ranging from 22% to 55% by study. Significant heterogeneity exists among studies. Nonetheless, these employment rates are lower than in the general population and kidneytransplant population. Most consistent employment predictors include pre-LT employment status, male gender, functional/health status, and subjective work ability. Work ability is impaired by physical fatigue and depression, but affected also by working conditions and society. Promotion of post-LT employment is hampered by a lack of interventional studies. Prevention of pre-LT disability by effective treatment of(minimal) hepatic encephalopathy, maintaining mobility, and planning work adjustments early in the course of chronic liver disease, as well as timely post-LT physical rehabilitation, continuous encouragement, self-efficacy improvements, and depression management are key elements of successful employment-promoting strategies. Prolonging LT recipients' working life would further strengthen the success of transplantation, and this is likely best achieved through multidisciplinary efforts ideally starting even before LT candidacy. 展开更多
关键词 employment Workforce TRANSPLANTATION quality of LIFE Work ABILITY
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部