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| 1 | Selection of Adaptive Grass and Frutex and Their Planting Benefits in the Arid-Hot Valleys of Yuanmou显示文摘In view of the environment character of the soil and content of the soil organic carbon, 278 species of grass and frutex were introduced from abroad and China, Some were selected by applied production and plantation benefit investigations. The results showed that:In the arid-hot valleys of Yuanmou the selected species showed the characteristics of fast growth and high yield (38 227.00 kg/hm2), high nutrition value (CP% content of legu-minous grass and frutex were 22.47%), as well as the strong adversity resistance to high air temperature and arid climate (soil humidity was 3.4%). The selected species not only effectively meliorated soil and increased fertility, but also improved small environment weather. | LONG Huiying SHA Yucang ZHU Hongye ZHANG Yingcui JIN Jie SHI Liangtao | 2008 | Wuhan University Journal of Natural Sciences2008，13，3： | 13 |
| 2 | Gas diffusion in a cylindrical coal sample – A general solution,approximation and error analyses显示文摘The analytical mathematical solutions of gas concentration and fractional gas loss for the diffusion of gas in a cylindrical coal sample were given with detailed mathematical derivations by assuming that the diffusion of gas through the coal matrix is concentration gradient-driven and obeys the Fick’s Second Law of Diffusion.The analytical solutions were approximated in case of small values of time and the error analyses associated with the approximation were also undertaken.The results indicate that the square root relationship of gas release in the early stage of desorption,which is widely used to provide a simple and fast estimation of the lost gas,is the first term of the approximation,and care must be taken in using the square root relationship as a significant error might be introduced with increase in the lost time and decrease in effective diameter of a cylindrical coal sample. | Li Yaobin Xue Sheng Wang Junfeng Wang Yucang Xie Jun | 2014 | International Journal of Mining Science and Technology2014，24，1： | 12 |
| 3 | Advances in gas content based on outburst control technology in Huainan, China显示文摘The sudden and violent nature of coal and gas outbursts continues to pose a serious threat to coal mine safety in China. One of the key issues is to predict the occurrence of outbursts. Current methods that are used for predicting the outbursts in China are considered to be inadequate, inappropriate or impractical in some seam conditions. In recent years, Huainan Mining Industry Group(Huainan) in China and the Commonwealth Scientific and Industrial Research Organisation(CSIRO) in Australia have been jointly developing technology based on gas content in coal seams to predict the occurrence of outbursts in Huainan. Significant progresses in the technology development have been made, including the development of a more rapid and accurate system in determining gas content in coal seams, the invention of a sampling-while-drilling unit for fast and pointed coal sampling, and the coupling of DEM and LBM codes for advanced numerical simulation of outburst initiation and propagation. These advances are described in this paper. | Xue Sheng Yuan Liang Xie Juna Wang Yucang | 2014 | International Journal of Mining Science and Technology2014，24，3： | 10 |
| 4 | A coupled DEM and LBM model for simulation of outbursts of coal and gas显示文摘 | Sheng Xue Liang Yuan Junfeng Wang Yucang Wang Jun Xie | 2015 | International Journal of Coal Science & Technology2015，2，1： | 9 |
| 5 | Lattice Solid/Boltzmann Microscopic Model to Simulate Solid/Fluid Systems——A Tool to Study Creation of Fluid Flow Networks for Viable Deep Geothermal Energy显示文摘Realizing the potential of geothermal energy as a cheap,green,sustainable resource to provide for the planet's future energy demands that a key geophysical problem be solved first: how to develop and maintain a network of multiple fluid flow pathways for the time required to deplete the heat within a given region. We present the key components for micro-scale particle-based numerical modeling of hydraulic fracture,and fluid and heat flow in geothermal reservoirs. They are based on the latest developments of ESy S-Particle—the coupling of the lattice solid model(LSM) to simulate the nonlinear dynamics of complex solids with the lattice Boltzmann method(LBM) applied to the nonlinear dynamics of coupled fluid and heat flow in the complex solid-fluid system. The coupled LSM/LBM can be used to simulate development of fracture systems in discontinuous media,elastic stress release,fluid injection and the consequent slip at joint surfaces,and hydraulic fracturing; heat exchange between hot rocks and water within flow pathways created through hydraulic fracturing; and fluid flow through complex,narrow,compact and gouge- or powder-filled fracture and joint systems. We demonstrate the coupled LSM/LBM to simulate the fundamental processes listed above,which are all components for the generation and sustainability of the hot-fractured rock geothermal energy fracture systems required to exploit this new green-energy resource. | Peter Mora Yucang Wang Fernando Alonso-Marroquin | 2015 | Journal of Earth Science2015，26，1： | 5 |
| 6 | A general solution and approximation for the diffusion of gas in a spherical coal sample显示文摘The square root relationship of gas release in the early stage of desorption is widely used to provide a simple and fast estimation of the lost gas in coal mines. However, questions arise as to how the relationship was theoretically derived, what are the assumptions and applicable conditions and how large the error will be. In this paper, the analytical solutions of gas concentration and fractional gas loss for the diffusion of gas in a spherical coal sample were given with detailed mathematical derivations based on the diffusion equation. The analytical solutions were approximated in case of small values of time and the error analyses associated with the approximation were also undertaken. The results indicate that the square root relationship of gas release is the first term of the approximation, and care must be taken in using the square root relationship as a significant error might be introduced with increase in the lost time and decrease in effective diameter of a spherical coal sample. | Wang Yucang Xue Sheng Xie Jun | 2014 | International Journal of Mining Science and Technology2014，24，3： | 4 |
| 7 | The Experimental Simulation of Rocks on Load/Unload Response Ratio for Earthquake Prediction显示文摘The load/unload experiments on rock failure under pressure have been carried out in Material Test System (MTS) in the Laboratory for Non-linear Mechanics of Continuous Media (LNM), Institute of Mechanics, Chinese Academy of Sciences, and load/unload response ratio (LURR) values with strain as response (i.e. inverse elastic constant as response rate) have been obtained. The experimental results are in accordance with theoretical results and those in real earthquakes: LURR rises just before rock failure. So LURR can be used as the precursor of rock failure and earthquake prediction. | Wang Yucang, Yin Xiangchu, and Wang HaitaoLaboratory for Non-linear Mechanics of Continuous Media (LNM), Institute of Mechanics,Chinese Academy of Sciences, Beijing 100080, ChinaLaboratory for Non-linear Mechanics of Continuous Media (LNM), Institute of Mechanics,Chinese Academy of Sciences, Beijing 100080, ChinaCenter for Analysis and Prediction , CSB, Beijing 100036, China | 1998 | Earthquake Research in China1998，12，4： | 3 |
| 8 | Grass Litter Decomposition Rate and Water-Holding Capacity in Dry-Hot Valley of Jinshajiang River显示文摘The decomposition rate and the water-holding capacity of 6 kinds of grass litters were studied in the Jinshajiang river dry-hot valley. The results showed that the dry weight remains reduced with time but did not have a direct correlation with time. The decomposi-tion litters were affected by climate, character of litter, animalcule and soil animal. The climate factors of temperature and humidity were important especially. The water-holding capacity was in the sequence of N. wightii (336%), P. notatum Flugge (248%), H. con-tortus (L.) Beauv (209%), B. pertusa (L.) A. Camus(206%), I. ende-caphylla Jacq (174%), D. annulatum (Forsk.) Stapf (168%). After 24 months decomposition the remaining dry weight of the litter was in the sequence as follows: 15.12% for N. wightii, 26.38% for I. ende-caphylla Jacq, 27.23% for B. pertusa (L.) A. Camus, 30.78% for P. notatum Flugge, 39.72% for H. contortus (L.) Beauv and 39.76% for D. annulatum (Forsk.) Stapf. The decomposition rate and wa-ter-holding capacity of N. wightii are at the highest level. It is impor-tant for the development, improvement and conservation of the grass-land soil. | ZHANG Mingzhong ZHU Hongye JIN Jie SHI Liangtao SHA Yucang | 2009 | Wuhan University Journal of Natural Sciences2009，14，1： | 2 |
| 9 | Vegetation Restoration Technique System and Its Ecological Functions of the Degraded Ecosystem in the Arid-Hot Valleys——Taking the Example of Typical Mode in Small Watershed of Yuanmou显示文摘This paper concluded the vegetation restoration technique system in the arid-hot valleys and studied the anti-erosion function, environmental function and biological diversity effects of vegetation restoration on the ecosystem in the arid-hot valleys. The results showed that the soil erodibility decreased significantly after the vegetation restoration. The climate environment of the small watershed had a great improvement after the vegetation restoration, of which the temperature decreased, the humidity increased, the harsh environment of dry and hot in this region changed. The studies of the ecosystem biodiversity were mainly on the analysis of the relations between biodiversity and ecological function of the artificial ecological forest pattern and the natural enclosed treatment mode on the severely of degraded land. It could conclude that the natural en-closed treatment mode is helpful to the biodiversity of the ecosystem and the improvement and stability of the ecosystem, and Leucaena artificial forest restoration pattern reduced the species diversity but optimized the ecological function. Therefore, as to the severely and extremely severely degraded ecosystem in the arid-hot valleys, Leucaena pattern of gully control and natural enclosed treatment mode are the relatively optimal choices. | JI Zhonghua LIAO Chengfei YANG Yanxian FANG Haidong PAN Zhixian SHA Yucang | 2008 | Wuhan University Journal of Natural Sciences2008，13，3： | 2 |
| 10 | Landscape Ecological Evaluation on the Artificial Forest of Leucaena leucocephala——Taking the Example of Xiaokua Hill of Yuanmou显示文摘Based on the theory of ecology, this article conducted a landscape ecological evaluation on Leucaena leucocephala artificial forest in the arid-hot valley, Yuanmou Xiaokua hill,using a combination method of qualitative analysis and landscape comprehensive evaluation. The comprehensive evaluation indexes of landscape include forest coverage, biodiversity, stability, soil erosion, environmental quality, availability, scientific research characteristic, economic benefits. Using AHP (analytical hierarchy process), determine the grade of ecological evaluation factors and the weight of evaluation index and calculate the CEI (comprehensive evaluation index) on ecological evaluation. Evaluation results showed that the area CEI was 0.714 225, a better quality of the eco-logical level, but biodiversity indicators was the lowest. To sum up, it was difficult to maintain ecological restoration effectiveness and process but also guarantee a good biodiversity in the arid-hot valleys. We must reasonably arrange the alien species and the native species, in order to obtain a stable and sustainable eco-system. | HE Shoujia LIAO Chengfei YANG Yanxian PAN Zhixian SHA Yucang JI Zhonghua | 2008 | Wuhan University Journal of Natural Sciences2008，13，3： | 2 |
| 11 | TiO2-incorporated polyelectrolyte composite membrane with transformable hydrophilicity/hydrophobicity for nanofiltration separation显示文摘The wettability of the membrane surface has shown obvious influent on the separation performance of the membrane.In this work,a hydrophilic PDA-[PDDA/TiO2]+Cl-membrane was prepared by a one-step codeposition of poly(diallyldimethylammonium chloride)(PDDA)polyelectrolyte solution containing positively charged TiO2@PDDA nanoparticles with the assistance of dopamine(DA).Such positively charged membrane can be transformed into a hydrophobic membrane PDA-[PDDA/TiO2]+PFO-via the counterion exchange between Cl-and PFO-(perfluorooctanoate).The transformation between hydrophilicity and hydrophobicity is reversible.For both hydrophilic and hydrophobic membranes,the nanofiltration performances were respectively investigated by the aqueous solution and ethanol solution of dyes including methyl blue(MB),Congo red(CR)and Evans blue(EB),and as well metal salt aqueous solution.The consecutive running stability and anti-fouling performance of both hydrophilic and hydrophobic membranes were explored.The results revealed that both membranes showed high nanofiltration performances for retention of dyes in(non)aqueous solution.For the hydrophilic membrane,the rejection of salts in a sequence is MgSO4>Na2SO4>MgCl2>NaCl.Moreover,both of the hydrophilic and hydrophobic membranes showed high stability and antifouling property. | Yahua Lu Zhenping Qin Naixin Wang Hongxia Guo Quanfu An Yucang Liang | 2020 | Chinese Journal of Chemical Engineering2020，28，10： | 2 |
| 12 | Rainfall-Interception Effect of Vegetation Restored Region of Gully in Arid-Hot Valley of Jinshajiang River显示文摘This paper divides the process of rainfall redistribution into four levels in vegetation restored region of gully in arid-hot valley of Jinshajiang River. These levels include arbor interception, litter interception, soil interception and surface runoff. The results showed that the maximum of interception was 8.10 mm, the mean interception was 4.53 mm, the maximum of interception rate was 56.10 % and the mean interception rate was 32.63 %.When the rainfall is over 20 mm, the interception rate descends rapidly along with the rainfall increasing. The maximum of water-holding content of litter was 8.14-20.33 t/hm2, the mean of which is 12.52 t/hm2 and the maximum of water-holding content was over two times of it own weight.The rainfall of litter interception was 150.24 mm, accounted for the rainfall income 24.48%.The maximum water-holding capacity of soil achieves 2 198.54 t/hm2, but that of the barren land is 1 825.60 t/hm2. The rainfall of soil interception was 219.87 mm, accounted for the rainfall income 35.82%. The surface runoff of vegetation restored region was 43.41 mm, accounted for 7.07% of the rainfall income, but the surface runoff of non-forest land was 413.24 mm, accounts for 70.26% of the rainfall income.The surface runoff of the planted forest community was by 63.19% lower than that of the non-forest land. Through the interception of the forest land that reduced the soil erosion effectively, good hydrology effect was obtained. | FANG Haidong DUAN Changqun JI Zhonghua LIAO Chengfei SHA Yucang PAN Zhixian | 2008 | Wuhan University Journal of Natural Sciences2008，13，3： | 2 |
| 13 | Characterization of liquefied product from cellulose presence of sulfuric with phenol in the acid显示文摘 | Yucang Zhang Atsushi lkeda Naruhito Hori | 2006 | Bioresource Technology2006，97，2： | 1 |
| 14 | Development of a New Approach to Earthquake Prediction-Load/unload Response Ratio(LURR) Theory显示文摘 | Xiang-chu YIN Yucang WANG Keyin PANG | 2000 | Pure Appl Geophys2000，157，： | 1 |
| 15 | Characteriza-tion of liquefied product from cellulose with phenol in the pres-ence of sulfuric acid显示文摘 | Zhang Yucang Atsush I I Naruh Ito H | 2006 | Bioresource Technology2006，97，： | 1 |
| 16 | Development of a new approach to earthquake prediction Load/Unload Response Ratio (LURR) theory 显示文摘 | Yin Xiangchu Chen Xuezhong Wang Yucang | 2000 | Pure and Applied Geophysics2000，157，1112： | 1 |
| 17 | LURR’s Twenty Years and its Perspective显示文摘 | Xiang-Chu Yin Lang-Ping Zhang Hui-Hui Zhang Can Yin Yucang Wang Yongxian Zhang Keyin Peng Haitao Wang Zhiping Song Huaizhong Yu Jiancang Zhuang | 2006 | Pure and Applied Geophysics (-)2006，，11： | 1 |
| 18 | Characterization of liquefied product from cellulose with phenol in the presence of sulfuric acid显示文摘 | YUCANG ZHANG IKEDA A HORI N | 2006 | Bioresource Technology2006，97，： | 1 |
| 19 | Characterization of liquefied product from cellulose with phenol in the presence of sulfuric acid显示文摘 | IKEDA A HORI N | 2006 | Bioresource Technology2006，97，： | 1 |
| 20 | Revisiting rolling and sliding in two-dimensional discrete element models显示文摘It has long been recognized that the rotation of single particles plays a very important role in simulations of granular flow using the discrete element method(DEM).Many researchers have also pointed out that the effect of rolling resistance at the contact points should be taken into account in DEM simulations.However,even for the simplest case involving two-dimensional circular particles,there is no agreement on the best way to define rolling and sliding,and different definitions and calculations of rolling and sliding have been proposed.It has even been suggested that a unique rolling and sliding definition is not possible.In this paper we assess results from previous studies on rolling and sliding in discrete element models and find that some researchers have overlooked the effect of particles of different sizes.After considering the particle radius in the derivation of rolling velocity,all results reach the same outcome:a unique solution.We also present a clear and simple derivation and validate our result using cases of rolling.Such a decomposition of relative motion is objective,or independent of the reference frame in which the relative motion is measured. | Yucang Wang Fernando Alonso-Marroquin Sheng Xue Jun Xie | 2015 | Particuology2015，13，1： | 1 |
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