Geochronological and geochemical constraints on the ore-related granites in Huanggang deposit, Southern Great Xing’an Range, NE China and its tectonic significance

Wei Mei,Xinbiao Lü,Zhi Liu,Rankun Tang,Zhilong Ai,Xiangdong Wang,Mamady Cisse 한국지질과학협의회 2015 Geosciences Journal Vol.19 No.1

Huanggang skarn Fe-Sn deposit is located in themain ridge Sn-polymetallic metallogenic sub-belt of the SouthernGreat Xing’an Range. A combination of zircon U-Pb age, geochemistryand Hf isotopic composition are reported for the orerelatedgranite (K-feldspar granite) of the Huanggang deposit toconstrain its petrogenesis and tectonic setting. LA-ICP-MS U-PbZircon dating results indicate that the K-feldspar granite wasintruded at 145.3 ± 1.6Ma. The K-feldspar granites belong to high-K calc-alkaline and shoshonite series, mainly peraluminous. Theserocks have a negative slope from La to Lu with strongly negativeEu anomalies, they demonstrate negative Ba, Sr P, Ti and Nbspikes and positive Th, U, Nd spikes on the normalized incompatibleelement diagrams. The regional geological setting togetherwith the geochemistry of the K-feldspar granite indicates that it isformed in a post-orogenic setting. The zircon Hf isotopic compositions(εHf(t): +5.2 to +6.6, 176Hf/177Hf: 0.282837‒0.282876) indicateboth juvenile crust sources that originated from depleted mantleand some ancient continental crust sources contributed to its origin,and there is a significant addition of juvenile crust under theSouthern Great Xing’an Range during the time from Paleo-Neoproterozoicto Phanerozoic.

캐릭터 액션 요소의 통합은 신체적 동기 부여를 촉진 방안 연구 중등 직업 무용 교육을 중심으로

( Wu Weimei ) 지속가능경영학회 2022 인문사회과학예술융합학회지 Vol.6 No.2

인간적인 아름다움을 가꾸고 학생들이 몸을 통해 아름다움에 빠져들고 훈련받을 수 있도록 안내하는 것이 춤 미학 교육에서 중요합니다. 춤 교실의 가르침 효과를 향상시키기 위해, 학생들은 춤 경험을 통해 춤 예술과 춤 예술이 가져다주는 아름다움을 다양한 방법으로 느낄 수 있습니다. 춤 교실 가르치는 방법의 적용을 적극적으로 탐구하고, 예술 실천과 예술 경험의 미학 교육 역할을 충분히 발휘합니다. 정신, 몸, 영혼에서 더 많은 삼면적 아름다움 경험을 얻습니다. 몸의 미적 가치와 온톨로지적 의미를 사람들에게 폄하하는 것이 춤 역사에서 흔한 일입니다. 춤에서 사용되는 몸의 언어는 일정한 발언권과 지시 기호를 가지고 있으며 학생들에게 다양한 언어를 경험하고 사용하도록 안내합니다. 몸의 구성은 다른 경험, 환경 및 개인적인 인식 능력에 따라 일정한 차이점을 가집니다. 몸의 아름다움은 자연 아름다움의 정점, 사회적 아름다움의 운반자이며, 특히 미술 및 공연 예술의 중심입니다. 무용미학 교육의 효과성 아래에서, 신체 능력을 향상시키고 적극적인 참여를 안내하여 주도적 주체성을 향상시킵니다. 인간적인 아름다움과 학생들이 몸과 마음을 결합한 보다 장기적인 아름다움, 도덕성, 의지 등을 포함한 개인의 미학적 교육에 초점을 맞춥니다. It is important in dance aesthetic education to cultivate human beauty and guide students to immerse themselves in beauty through their bodies and receive training. To enhance the effectiveness of dance classroom instruction, students can experience the beauty of dance art and the beauty it brings in various ways through dance experience. It actively explores the application of teaching methods in dance classrooms and fully demonstrates the aesthetic education role of artistic practice and experience. It gains more comprehensive experiences of beauty in the mind, body, and soul. It is common in dance history to belittle the aesthetic value and ontological meaning of the body. The body language used in dance has a certain right to speak and directive symbols, and guides students to experience and use various languages. The composition of the body has certain differences depending on different experiences, environments, and personal perception abilities. The beauty of the body is the pinnacle of natural beauty, a carrier of social beauty, and particularly the centerpiece of fine and performing arts. Under the effectiveness of dance aesthetic education, it enhances physical abilities and leads to active participation, improving proactive subjectivity. It focuses on individual aesthetic education, including human beauty and the more long-term beauty, morality, willpower, etc. that come from the combination of students' bodies and minds.

Determination of Urban Surface Aerodynamic Characteristics Using Marquardt Method

Ning Zhang,Weimei Jiang,Zhiqiu Gao,Fei Hu,Zhen Peng 한국풍공학회 2009 Wind and Structures, An International Journal (WAS Vol.12 No.3

Systematic influence of different building spacing, height and layout on mean wind and turbulent characteristics within and over urban building arrays

Dehai Jiang,Weimei Jiang,Hongnian Liu,Jianning Sun 한국풍공학회 2008 Wind and Structures, An International Journal (WAS Vol.11 No.4

Large eddy simulations have been performed within and over different types of urban building arrays. This paper adopted three dimensionless parameters, building frontal area density (λf), the variation degree of building height (σh), and the staggered degree of building range (rs), to study the systematic influence of building spacing, height and layout on wind and turbulent characteristics. The following results have been achieved: (1) As λf decrease from 0.25 to 0.18, the mean flow patterns transfer from “skimming” flow to “wake interference” flow, and as λf decrease from 0.06 to 0.04, the mean flow patterns transfer from “wake interference” flow to “isolated roughness” flow. With increasing σh, wind velocity within arrays increases, and the vortexes in front of low buildings would break, even disappear, whereas the vortexes in front of tall buildings would strengthen and expand. Tall buildings have greater disturbance on wind than low buildings do. (2) All the wind velocity profiles and the upstream profile converge at the height of 2.5H approximately. The decay of wind velocity within the building canopy was in positive correlation with λf and rs. If the height of building arrays is variable, Macdonald’s wind velocity model should be modified through introducing σh, because wind velocity decreases at the upper layers of the canopy and increases at the lower layers of the canopy. (3) The maximum of turbulence kinetic energy (TKE) always locates at 1.2 times as high as the buildings. TKE within the canopy decreases with increasing λf and rs but the maximum of TKE are very close though σh varies. (4) Wind velocity profile follows the logarithmic law approximately above the building canopy. The Zero-plane displacement zd heighten with increasing λf, whereas the maximum of and Roughness length z0 occurs when λf is about 0.14. zd and z0 heighten linearly with σh and rs, If σh is large enough, zd may become higher than the average height of buildings.

Numerical method study of how buildings affect the flow characteristics of an urban canopy

Ning Zhang,Weimei Jiang,Fei Hu 한국풍공학회 2004 Wind and Structures, An International Journal (WAS Vol.7 No.3

Systematic influence of different building spacing, height and layout on mean wind and turbulent characteristics within and over urban building arrays

Jiang, Dehai,Jiang, Weimei,Liu, Hongnian,Sun, Jianning Techno-Press 2008 Wind and Structures, An International Journal (WAS Vol.11 No.4

Large eddy simulations have been performed within and over different types of urban building arrays. This paper adopted three dimensionless parameters, building frontal area density (${\lambda}_f$) the variation degree of building height (${\sigma}_h$), and the staggered degree of building range ($r_s$), to study the systematic influence of building spacing, height and layout on wind and turbulent characteristics. The following results have been achieved: (1) As ${\lambda}_f$ decrease from 0.25 to 0.18, the mean flow patterns transfer from "skimming" flow to "wake interference" flow, and as ${\lambda}_f$ decrease from 0.06 to 0.04, the mean flow patterns transfer from "wake interference" flow to "isolated roughness" flow. With increasing ${\lambda}_f$, wind velocity within arrays increases, and the vortexes in front of low buildings would break, even disappear, whereas the vortexes in front of tall buildings would strengthen and expand. Tall buildings have greater disturbance on wind than low buildings do. (2) All the wind velocity profiles and the upstream profile converge at the height of 2.5H approximately. The decay of wind velocity within the building canopy was in positive correlation with ${\lambda}_f$ and $r_s$. If the height of building arrays is variable, Macdonald's wind velocity model should be modified through introducing ${\sigma}_h$, because wind velocity decreases at the upper layers of the canopy and increases at the lower layers of the canopy. (3) The maximum of turbulence kinetic energy (TKE) always locates at 1.2 times as high as the buildings. TKE within the canopy decreases with increasing ${\lambda}_f$ and $r_s$ but the maximum of TKE are very close though ${\sigma}_h$ varies. (4) Wind velocity profile follows the logarithmic law approximately above the building canopy. The Zero-plane displacement $z_d$ heighten with increasing ${\lambda}_f$, whereas the maximum of and Roughness length $z_0$ occurs when ${\lambda}_f$ is about 0.14. $z_d$ and $z_0$ heighten linearly with ${\sigma}_h$ and $r_s$, If ${\sigma}_h$ is large enough, $z_d$ may become higher than the average height of buildings.

A large eddy simulation on the effect of buildings on urban flows

Zhang, Ning,Jiang, Weimei,Miao, Shiguang Techno-Press 2006 Wind and Structures, An International Journal (WAS Vol.9 No.1

The effect of buildings on flow in urban canopy is one of the most important problems in local/micro-scale meteorology. A large eddy simulation model is used to simulate the flow structure in an urban neighborhood and the bulk effect of the buildings on surrounding flows is analyzed. The results demonstrate that: (a) The inflow conditions affect the detailed flow characteristics much in the building group, including: the distortion or disappearance of the wake vortexes, the change of funneling effect area and the change of location, size of the static-wind area. (b) The bulk effect of the buildings leads to a loss of wind speed in the low layer where height is less than four times of the average building height, and this loss effect changes little when the inflow direction changes. (c) In the bulk effect to environmental fields, the change of inflow direction affects the vertical distribution of turbulence greatly. The peak value of the turbulence energy appears at the height of the average building height. The attribution of fluctuations of different components to turbulence changes greatly at different height levels, in the low levels the horizontal speed fluctuation attribute mostly, while the vertical speed fluctuation does in high levels.

Determination of Urban Surface Aerodynamic Characteristics Using Marquardt Method

Zhang, Ning,Jiang, Weimei,Gao, Zhiqiu,Hu, Fei,Peng, Zhen Techno-Press 2009 Wind and Structures, An International Journal (WAS Vol.12 No.3

Marquardt method is used to estimate the aerodynamic parameters in urban area of Beijing City, China, including displacement length (d), roughness length ($z_0$) and friction velocity (u*) and drag coefficient. The surface drag coefficient defined as the ratio between friction velocity and mean wind speed is 0.125 in our research, which is close to typical urban area value. The averaged d and $z_0$ are 1.2 m and 7.6 m. d and $z_0$ change with direction because of the surface heterogeneity over urban surface and reach their maximum values at S-SW sector, this tendency agrees with the surface rough element distribution around the observation tower.

Numerical method study of how buildings affect the flow characteristics of an urban canopy

Zhang, Ning,Jiang, Weimei,Hu, Fei Techno-Press 2004 Wind and Structures, An International Journal (WAS Vol.7 No.3

The study of how buildings affect wind flow is an important part of the research being conducted on urban climate and urban air quality. NJU-UCFM, a standard $k-{\varepsilon}$ turbulence closure model, is presented and is used to simulate how the following affect wind flow characteristics: (1) an isolated building, (2) urban canyons, (3) an irregular shaped building cluster, and (4) a real urban neighborhood. The numerical results are compared with previous researchers' results and with wind tunnel experiment results. It is demonstrated that the geometries and the distribution of urban buildings affect airflow greatly, and some examples of this include a changing of the vortices behind buildings and a "channeling effect". Although the mean air flows are well simulated by the standard $k-{\varepsilon}$ models, it is important to pay attention to certain discrepancies when results from the standard $k-{\varepsilon}$ models are used in design or policy decisions: The standard $k-{\varepsilon}$ model may overestimate the turbulence energy near the frontal side of buildings, may underestimate the range of high turbulence energy in urban areas, and may omit some important information (such as the reverse air flows above the building roofs). In ideal inflow conditions, the effects of the heights of buildings may be underestimated, when compared with field observations.

A large eddy simulation on the effect of buildings on urban flows

Shiguang Miao,Ning Zhang,Weimei Jiang 한국풍공학회 2006 Wind and Structures, An International Journal (WAS Vol.9 No.1