Application of IP Middle Ladder Method in Polymetallic Ore Exploration in Southern Shaanxi Province

AbstractThe earliest fossil record of animal biomineralization occurs in the latest Ediacaran Period (c. 550 Ma).CloudinaandSinotubulitesare two important tubular taxa among these earliest skeletal fossils. The evolutionary fate ofCloudina-type fossils across the Ediacaran–Cambrian transition, however, remains poorly understood. Here we report a multi-layered tubular microfossilFeiyanella manicagen. et sp. nov. from a phosphorite interval of the lowest Cambrian Kuanchuanpu Formation, southern Shaanxi Province, South China. This newly discovered fossil is a conical tube with a ‘funnel-in-funnel’ construction, showing profound morphological similarities toCloudinaandConotubus. On the other hand, the outer few layers, and particularly the outermost layer, ofFeiyanellatubes are regularly to irregularly corrugated, a feature strikingly similar to the variably folded/wrinkled tube walls ofSinotubulites. TheFeiyanellatubes additionally exhibit two orders of dichotomous branching, similar to branching structures reported occasionally inCloudinaand possibly indicative of asexual reproduction. Owing to broad similarities in tube morphology, tube wall construction and features presumably indicative of asexual reproduction,Cloudina, Conotubus, Sinotubulitesand the here describedFeiyanellamay thus constitute a monophyletic group traversing the Ediacaran–Cambrian boundary. The tube construction and palaeoecological strategy ofFeiyanellaputatively indicate evolutionary continuity in morphology and palaeoecology of benthic metazoan communities across the Ediacaran–Cambrian transition.

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Changes in the epidemiological characteristics of human brucellosis in Shaanxi Province from 2008 to 2020

Scientific Reports ◽

10.1038/s41598-021-96774-x ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Cui-hong An ◽

Zhi-guo Liu ◽

Shou-min Nie ◽

Yang-xin Sun ◽

Suo-ping Fan ◽

...

Keyword(s):

Incidence Rate ◽

Large Scale ◽

Small Ruminants ◽

Raw Milk ◽

Shaanxi Province ◽

Significant Feature ◽

Human Brucellosis ◽

Northern Shaanxi ◽

Southern Shaanxi ◽

Epidemiological Characteristics

AbstractIn the present study, surveys of case numbers, constituent ratios, conventional biotyping, and multilocus sequence typing (MLST) were applied to characterize the incidence rate and epidemiological characteristics of human brucellosis in Shaanxi Province, China. A total of 12,215 human brucellosis cases were reported during 2008–2020, for an annual average incidence rate of 2.48/100,000. The most significant change was that the county numbers of reported cases increased from 36 in 2008 to 84 in 2020, with a geographic expansion trend from northern Shaanxi to Guanzhong, and southern Shaanxi regions; the incidence rate declined in previous epidemic northern Shaanxi regions while increasing each year in Guanzhong and southern Shaanxi regions such as Hancheng and Xianyang. The increased incidence was closely related to the development of large-scale small ruminants (goats and sheep) farms in Guanzhong and some southern Shaanxi regions. Another significant feature was that student cases (n = 261) were ranked second among all occupations, accounting for 2.14% of the total number of cases, with the majority due to drinking unsterilized goat milk. Three Brucella species were detected (B. melitensis (bv. 1, 2, 3 and variant), B. abortus bv. 3/6, and B. suis bv. 1) and were mainly distributed in the northern Shaanxi and Guanzhong regions. Three known STs (ST8, ST2, and ST14) were identified based on MLST analysis. The characteristics that had not changed were that B. melitensis strains belonging to the ST8 population were the dominant species and were observed in all nine regions during the examined periods. Strengthened human and animal brucellosis surveillance and restriction of the transfer of infected sheep (goats) as well as students avoiding drinking raw milk are suggested as optimal control strategies.

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Talking about the Soil Erosion Problems and Countermeasures in Land Consolidation in Hilly and Mountainous Areas of Southern Shaanxi Province

Open Journal of Soil and Water Conservation ◽

10.12677/ojswc.2019.73007 ◽

2019 ◽

Vol 07 (03) ◽

pp. 47-51

Author(s):

东文花

Keyword(s):

Soil Erosion ◽

Shaanxi Province ◽

Land Consolidation ◽

Mountainous Areas ◽

Southern Shaanxi

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New bradoriids from the Lower Cambrian Yanwangbian formation of southern Shaanxi Province, Central China

Palaeoworld ◽

10.1016/j.palwor.2008.02.003 ◽

2008 ◽

Vol 17 (2) ◽

pp. 102-107 ◽

Cited By ~ 3

Author(s):

Yu Liu ◽

Xing-Liang Zhang ◽

Wei Liu ◽

Qian Zhang

Keyword(s):

Lower Cambrian ◽

Central China ◽

Shaanxi Province ◽

Southern Shaanxi

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Occurrence of the earliest known Sphenothallus Hall in the Lower Cambrian of Southern Shaanxi Province, China

Geobios ◽

10.1016/j.geobios.2003.04.002 ◽

2004 ◽

Vol 37 (2) ◽

pp. 229-237 ◽

Cited By ~ 15

Author(s):

Guo-Xiang Li ◽

Mao-Yan Zhu ◽

Heyo Van Iten ◽

Chia-Wei Li

Keyword(s):

Lower Cambrian ◽

Shaanxi Province ◽

Southern Shaanxi

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Spatiotemporal Assessment of Land Marketization and Its Driving Forces for Sustainable Urban–Rural Development in Shaanxi Province in China

Sustainability ◽

10.3390/su13147755 ◽

2021 ◽

Vol 13 (14) ◽

pp. 7755

Author(s):

Xindong Wei ◽

Ning Wang ◽

Pingping Luo ◽

Jie Yang ◽

Jian Zhang ◽

...

Keyword(s):

Rural Development ◽

Driving Forces ◽

Hot Spot ◽

Sustainable Use ◽

Shaanxi Province ◽

Use Of Resources ◽

Gray Relation Analysis ◽

Urban Rural ◽

Northern Shaanxi ◽

Southern Shaanxi

In recent years, market-oriented allocation of land has been promoted to support rural revitalization and urban–rural integrated development. To follow the path of sustainable development, it is necessary to improve the efficiency of resource utilization and to rationally allocate and use resources on the premise of ensuring the sustainable use of resources. This study aims to measure the degree of land marketization in Shaanxi Province, China during the period 2008–2019 and analyze its driving forces. The methods used include Gray Relation Analysis and Hot Spot Analysis. The MK trend method was used to analyze the average area of land acquired through Bidding–Listing–Auction (B-L-A), protocol, and allocation methods. The results show that the land marketization level in Shaanxi declined from 2008 to 2014 and fluctuated upwards from 2014 to 2019. In addition, B-L-A transactions increased across the province. There was little spatial heterogeneity of land marketization, but southern Shaanxi had less land marketization than the other key areas. Urbanization, non-agricultural output, and foreign direct investment were found to be the main driving factors of land marketization, while the influence of fixed asset investment and per capita disposable income declined each year. Based on these findings, we suggest that there is a need for land management reforms and urbanization efforts to encourage land marketization in southern Shaanxi. Further, we suggest that northern Shaanxi would benefit from optimizing the land use structure and focusing on the energy land market. This study also provides theoretical support for realizing the reform of the marketization of national land elements, the healthy operation of urban land marketization, and sustainable urban and rural development.

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Coupling Coordination Analysis of Livelihood Efficiency and Land Use for Households in Poverty-Alleviated Mountainous Areas

Land ◽

10.3390/land10111115 ◽

2021 ◽

Vol 10 (11) ◽

pp. 1115

Author(s):

Fang Su ◽

Jiangbo Chang ◽

Haiyang Shang

Keyword(s):

Land Use ◽

Geographic Location ◽

The Other ◽

Shaanxi Province ◽

Mountainous Area ◽

Land Use Pattern ◽

Land System ◽

Medium Level ◽

Southern Shaanxi ◽

Coordination Degree

The interaction between livelihood means and land use pattern of households is the core of the interactive coupling of the human-land system. This study focuses on Qinba mountainous area in southern Shaanxi province, a typical poverty-alleviated mountainous area. With the help of the coupling coordination degree model, kernel density estimation, and trend surface analysis, this study constructs the coupling coordination degree of livelihood efficiency and land use for households, and analyzes the differences between households’ livelihood efficiency and land use level, as well as the coupling coordination relationship between households livelihood efficiency and land use in different types and regions. The research conclusions are as follows. (1) For households in the Qinba mountainous area, southern Shaanxi province, the livelihood efficiency is at a medium level of 0.681, the land use is at a low level of 0.127, while the coupling coordination degree 0.526 is at the primary coordination state. (2) With the increase of nonagricultural degree, the coupling coordination degree of households increases first, and then decreases. (3) The coupling coordination degree for households east-to-west is “sagging”, while south-to-north diagram is “hogging”. (4) The distribution of the coupling coordination degree for agriculture-dependent households east-to-west (the “sagging” diagram) is opposite to the other types of households. By analogy, the distribution of the coupling coordination degree for nonagriculture and agriculture-dependent households north-to-south (the “hogging” diagram) is opposite to the other types of households. The coupling coordination between the households’ livelihood efficiency and land use level is affected by the households’ regional development level, natural resources, geographic location, infrastructure availability and many other factors. Making appropriate livelihood development plans based on the types of households and regional space can both effectively improve the livelihood conditions, as well as offer guidance in promoting regional human-land activity coordination and ensuring sustainable development.

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