369 research outputs found
Interfacial Bond Properties between Normal Strength Concrete and Epoxy Resin Concrete
No full textFunding Information: This study was sponsored by the Natural Science Basic Research Program of Shaanxi (Grant no. 2020JQ-377). The financial support is gratefully appreciated. The assistance for experimental studies from China Chengdu Datong Road Bridge Machinery Company Limited, Chang'an University, is also appreciated. The China Scholarship Council is acknowledged for the financial support and assistance to the first author. Publisher Copyright: © 2021 Nannan Sun et al.It is necessary to pay attention to the bonding strength of the interface between precast normal strength concrete (NSC) and cast-in-place epoxy resin concrete (EMR) when using EMR as a repair or filling material or an overlay in bridges' rehabilitation. However, the performances of epoxy concrete are different due to differential mix ratios; thus, the bonding properties between various epoxy resin concrete and cement concrete are not completely the same. This article investigated the interfacial bond properties between NSC and ERC by direct tensile, push-out, and slant shear test with specimens of special size and structure and observed the interfacial bond strength and corresponding failure modes. The minimum bond strength under direct tension was 0.72 MPa, while the minimum bond strength was 1.71 MPa and 3.19 MPa for the push-out test and slant shear test, respectively. Results indicated that the slant shear test specimens with an inclination angle of 45° are not suitable for the slant shear test due to higher compressive stress. Furthermore, the cohesion and friction coefficient of interface bond strength were calculated inversely in accordance with the results obtained from the corresponding direct tensile and slant shear tests. The minimum cohesion value was 1.71 MPa, and the minimum friction coefficient value was 0.46.Peer reviewe
LIU RENHANG AND HERBERT G. WELLS
No full textLiu Renhang (1885–1938) was known as a Shanghai publicist and propagandist
of Buddhism, vegetarianism and non-violence. Having been educated in Japan, he
could not establish relations with Zhang Xun and Yan Xishan. He made a long journey
to India and Indochina, talked with Rabindranath Tagore. In the 1920s and 1930s, Liu
Renhang published over 30 books, mostly translated from Japanese and English. He
published translations of L. N. Tolstoy’s short stories, books on hydrotherapy and yoga,
and founded the Institute for the Cultivation of Joy in Shanghai (乐天 修养 馆). The main
work of his life was Dongfang Datong Xuean in 6 juan, the creation of which was carried
out in 1918–1924. The treatise was fully published in Shanghai in 1926, and was
reprinted in 1991 and 2014. Its main content was to consider the classical ideals of
Xiaokang and Datong, and the possibility of combining ideals with the realities of the modern world. Liu Renhang believed that the ideal of Datong Confucius and Kang Yuwei
is fully compatible with Buddhist teachings. During the fifth session of the Central
Election Commission of the Kuomintang of the fourth convocation (1934), he tried to
announce at the meeting a petition on the introduction of the principle of Great Unity in
international relations. In 1938, he created the utopian commune Datong in his native
village, and tried to interest Zhou Enlai and Dong Biu with his theories. In the Dongfang
Datong Xuean treatise, Liu Renhang introduced the “history of the future”, which was
influenced by H. G. Wells’ globalist and Fabian ideas. Liu Renhang directly referred to
his novel The War in the Air in conclusion to his own treatise. Like Wells, Liu looked with
pessimism on the prospects of modern mankind, and called for the emergence of a
“modern Genghis Khan”, who would ruin the world, on the ashes of which the sprout of
a new Great Unity would rise
Genetic Analysis of Geothermal Resources and Geothermal Geological Characteristics in Datong Basin, Northern China
No full textDatong Basin is a Cenozoic fault basin located in the central part of the North China Block with strong tectonic activity. The unique geological environment of Datong Basin is believed to have good conditions for the formation of geothermal resources. Based on the research of the classification, genesis and geothermal geological characteristics of geothermal resources, the geological conditions, seismic activity, volcanic activity, geophysical exploration results, terrestrial heat flow and hot springs in Datong Basin are analyzed. The possibility of the occurrence of geothermal resources in Datong Basin is determined, and the genesis and occurrence mechanisms of geothermal resources in Datong Basin are judged. The results show that Datong Basin satisfies the geological geothermal conditions of the formation of geothermal resources and is of great research value. The formation of geothermal resources in the Datong Basin is affected by the uplift of the Qinghai–Tibet Plateau and the destruction of the North China Craton. The geothermal resources in Datong Basin are formed by the combination of modern volcanic activity and strong inner-plate tectonic activities. The geothermal system is a combination of convective hydrothermal systems and partial melt systems. At the same time, it is concluded that the key research areas for the occurrence of geothermal resources are mainly in the northeastern part of the basin. It is recommended to carry out detailed and comprehensive exploration of the northeastern part of Datong Basin
Locations of the Datong Coalfield and Tongxin Minefield.
No full textLocations of the Datong Coalfield and Tongxin Minefield.</p
Luminescence dating of volcanic eruptions in Datong, northern China
No full textIn this study, fine-grain quartz was used for luminescence dating for lava baked samples from different sites in Datong. Optical stimulated luminescence (OSL), thermal transferred OSL (TT-OSL)/recuperated OSL (Re-OSL) and thermoluminescence (TL) dating protocols were applied. For these samples, the OSL signals saturate at about 300–400 Gy, which limits their age to less than 100 ka based on their ambient dose rates. The TT-OSL/Re-OSL method has poor dose recovery. TL dating gives reliable results, and multiple-aliquot regenerative-dose TL method with sensitivity change correction based on the 325 °C TL peak of a test dose can be applied for samples up to 400 ka. The results indicate that the ages of the volcanoes in Datong are from 380 ka to 84 ka. The volcanic activity started earlier in the southeast area than those in the northwest part, which is consist with the literature data.postprin
Ieee Access Special Section Editorial:Complex System Health Management Based on Condition Monitoring and Test Data
No full textThe temporal variations of the annual runoff and sediment load at Yichang and Datong.
No full textThe temporal variations of the annual runoff and sediment load at Yichang and Datong.</p
Occurrence characteristics and formation mechanism of coal-bearing kaolinite rocks in Datong coalfield
No full textThe kaolinite rocks, a resource of industrial value, are abundant in the coal-bearing strata of the Datong coalfield.To look into the occurrence characteristics and formation mechanism of coal-bearing kaolinites, this paper uses the kaolinite deposits in the Taiyuan formation of the Late Paleozoic in the study area as the research object.The occurrence horizon, structural composition, rock type and genesis analysis of the kaolinite deposit were studied through field geological survey, microscopic identification, XRD analysis and geochemical analysis.Results show that the kaolinite rock in Datong coalfield is mainly located in five layers, including the No.9 coal floor, the No.8 coal floor, the No.3 and 5 coal floor, No.3 and 5 coal parting and the No.2 coal floor to No.3 coal roof.The kaolinite is the predominant mineral(the content is between 60 % and 90 %)associated with minor minerals like quartz, feldspar, mica, anatase, siderite and diaspore.The micro-components of the kaolinite rock in the study area were divided into grains, kaolinite crystals, mineral clasts and matrix.In addition, the kaolinite rock in the study area were categorized as grain kaolinite rock, cryptocrystalline kaolinite rock, lump kaolinite rock and sandy kaolinite rock according to the present morphology analysis.In conclusion, the genesis of kaolinite rock is mainly terrigenous transport sedimentary and volcanic ash
Investigation on Common Chronic Non-Communicable Diseases and Epidemiological Characteristics of Forsaken Elders Over 60 Years Old in Rural Areas of Datong, China
No full textYongsheng Sun,1 ChengJiang Liu,2 Nianping Zhang,3 Debing Yang,4 Cungen Ma,5 Xi Zhang61Department of Neurology and Psychiatry, Medical College of Shanxi Datong University, Datong, 037009, People’s Republic of China; 2Department of General Medicine, Affiliated Anqing First People’s Hospital of Anhui Medical University, Anhui, 246000, People’s Republic of China; 3Department of Internal Medicine, Medical College of Shanxi Datong University, Datong, 037009, People’s Republic of China; 4Department of Anatomy, Medical College of Shanxi Datong University, Datong, 037009, People’s Republic of China; 5Neurobiology Research Center, Shanxi University of Traditional Chinese Medicine, Jinzhong, 030619, People’s Republic of China; 6Department of Neurology, Second Medical Center, General Hospital of the Chinese People’s Liberation Army, Beijing, 100000, People’s Republic of ChinaCorrespondence: Cungen Ma; Xi Zhang, Email [email protected]; [email protected]: The common chronic non-communicable diseases and epidemiological characteristics of the forsaken elders over 60 in Guangling and Tianzhen were investigated and analyzed to provide reference for health resource allocation, hospital capacity establishing and health management of the forsaken elders in county-level regions.Materials and Methods: The data of 10,331 resident elderly over 60 in Guangling and Tianzhen of Datong Civil Affairs Bureau in the management system for disabled and semi-disabled elderly was collected. The gender, age, main diagnosis and coding of diseases, common chronic non-communicable diseases, and system diseases of the respondents were retrospectively analyzed.Results: The prevalence of the forsaken elders aged over 60 in Guangling and Tianzhen were different. Hypertension, arthritis, type 2 diabetes, hyperlipidemia and cerebral infarction are the top five common chronic non infectious diseases in Guangling, Tianzhen and the two counties. Among the top five common diseases in Guangling, Tianzhen and the two counties, arthritis or rheumatism, hypertension, diabetes or elevated blood sugar were found, which were different in the 60– 65, 66– 70, 71– 75 and 76– 80 groups, with the prevalence increasing with age. The top five diseases in Guangling, Tianzhen and the two counties were consistent, while the ranking changed slightly. The proportion of circulatory diseases, musculoskeletal diseases, connective tissue diseases and endocrine/nutritional and metabolic diseases in 60– 65, 66– 70 and 71– 75 groups increased with age, and was much higher than that in other groups.Conclusion: The prevalence and disease spectrum order of common chronic non-communicable diseases and systemic diseases in Guangling and Tianzhen are diverse, also in gender and age groups. As China’s county-level local administrative divisions have relatively independent administrative autonomy, medical and health resources can be better configured according to the information mined, accurately maintaining and promoting residents’ health. It is suggested to explore the disease management mechanism with county-level administrative divisions as database management units under the background of big data, so as to implement the interconnection and sharing of information among health-related departments in county-level regions.Keywords: chronic non-communicable diseases, system diseases, administrative division, disease spectrum, the forsaken elder
Additional file 8 of Effects of aquaculture on the shallow lake aquatic ecological environment of Lake Datong, China
No full textAdditional file 8: Statistics of fish resources in Lake Datong
- …
