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Digital Relief Generation from 3D Models

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Chinese Journal of Mechanical Engineering 2016年第6期29卷 1128-1133页

作者： wang meili SUN Yu ZHANG Hongming QIAN Kun CHANG Jian HE Dongjian College of Information Engineering Northwest A & F University National Center for Computer Animation Bournemouth University College of Mechanical and Electronic Engineering Northwest A & F University

It is difficult to extend image-based relief generation to high-relief generation, as the images contain insufficient height information. To generate reliefs from three-dimensional （3D） models, it is necessary to extract the height fields from the model, but this can only generate bas-reliefs. To overcome this problem, an efficient method is proposed to generate bas-reliefs and high-reliefs directly from 3D meshes. To produce relief features that are visually appropriate, the 3D meshes are first scaled. 3D unsharp masking is used to enhance the visual features in the 3D mesh, and average smoothing and Laplacian smoothing are implemented to achieve better smoothing results. A nonlinear variable scaling scheme is then employed to generate the final bas-reliefs and high-reliefs. Using the proposed method, relief models can be generated from arbitrary viewing positions with different gestures and combinations of multiple 3D models. The generated relief models can be printed by 3D printers. The proposed method provides a means of generating both high-reliefs and bas-reliefs in an efficient and effective way under the appropriate scaling factors.

关键词： high-relief bas-relief mesh enhancement scaling

Direct hydrothermal synthesis and magnetic property of titanate nanotubes doped magnetic metal ions

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Journal of University of Science and Technology Beijing 2008年第5期15卷 644-648页

作者： meili wang Gongbao Song Jian Li Landong Miao Baoshu Zhang School of Materials Science and Engineering Southwest University of Science and Technology Mianyang 621002 China

Pure titanate nanotubes and titanate nanotubes doped with Fe^3＋/Ni^2＋/Mn^2＋ ions were synthesized by the hydrothermal method. In this process,titanate nanotubes were first prepared synchronously with doping Fe^3＋/Ni^2＋/Mn^2＋ ions. The morphology,structure,thermal stability and magnetic property of titanate nanotubes were characterized by X-ray diffraction （XRD）,transmission electron microscope （TEM）,and magnetic measurement. The titanate nanotubes transformed into the anatase titania nanocrystals,and further the mixture of anatase and rutile titania along with increasing temperature. The results indicate that the titanate nanotubes doped with Fe^3＋/Ni^2＋/Mn^2＋ ions are paramagnetic behaviors.

关键词： titanate nanotubes direct hydrothermal synthesis doping magnetic property

Resistance to salt stresses by aerobic granular sludge:sludge property and microbial community

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Frontiers of Environmental Science & Engineering 2024年第8期18卷 107-116页

作者： Xiao Wu Hui Li meili wang Tianying Zhang Jiawei Li Yongdi Liu Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission School of Chemistry and EnvironmentSouthwest Minzu UniversityChengdu 610041China Institute for Environmental Pollution and Health School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China School of Life Sciences Southwest UniversityChongqing 400715China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resources and Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China Institute of Qinghai-Tibetan Plateau Southwest Minzu UniversityChengdu 610041China

Saline wastewater is regarded as a challenge for wastewater treatment plants because high-salinity conditions negatively affect on traditional biological *** granular sludge(AGS)has gained attention as a promising technology for saline wastewater treatment because of its compact structure and the ability to withstand toxic ***,this study investigated the saltresistance performance,sludge properties and microbial community of AGS under low-salinity and high-salinity conditions,with the saline concentrations ranging from 0 to 50 g/*** results showed that AGS could withstand long-term saline stresses,and the maximum salinity reached 50 g/L within 113 *** salinities of 10,30,and 50 g/L,the chemical oxygen demand(COD)removal efficiencies were 90.3%,88.0%and 78.0%,*** also its maintained strength and aggregation at salinities of 10 and 30 g/*** of extracellular polymeric substances(EPS)by non-halophilic bacteria that enhanced sludge *** compact structure that ensured the microorganisms bioactivity helped to remove organic matters under salinities of 10 and 30 g/*** a salinity of 50 g/L,moderately halophilic bacteria,including Salinicola,Thioclava,Idiomarina and Albirhodobacter,prevailed in the *** dominant microbial communities shifted to moderately halophilic bacteria,which could maintain aerobic granular stabilization and remove organic matters under 50 g/L *** results in this study provide a further explanation for the long-term operation of AGS for treating saline wastewater at different *** is hoped that this work could bring some clues for the mystery of salt-resistance mechanisms.

关键词： Aerobic granular sludge Long-term saline stresses Performance Sludge property Microbial community

Evaluation of the Ignition Temperature in Thermal Explosion Synthesis of TiAl_3 by Differential Scanning Calorimetry

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Journal of Materials Science & Technology 2002年第4期18卷 331-334页

作者： Tao wang, meili ZHU and Junshan ZHANGDepartment of Materials Engineering, Dalian University of Technology, Dalian 116024, China Dept. of Mat. Eng. Dalian Univ. of Technol. Dalian 116024 China

Application of the Semenov theory of spontaneous ignition to evaluation of the critical temperature (Tc) in thermal explosion (TE) synthesis was conducted with the Ti-75at pct Al binary system using nonisothermal differential scanning calorimetry (DSC) at different heating rates. And the critical temperature for isothermal TE is predicted to be 728.9癈 by the multiple linear regression of Tcs evaluated according to Semenov theory, which is close to the range of 740~745癈 obtained from the isothermal DSC observation. This result proves that Semenov theory of spontaneous ignition is also feasible for TE synthesis in binary metallic systems like Ti-75 at. pct Al system.

关键词： Ignition temperature DSC thermal explosion synthesis TiAl3

The Tashisayi nephrite deposit from South Altyn Tagh, Xinjiang,northwest China

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Geoscience Frontiers 2019年第4期10卷 1597-1612页

作者： Kong Gao Guanghai Shi meili wang Gen Xie Jian wang Xiaochong Zhang Ting Fang Weiyan Lei Yan Liu State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences (Beijing)Beijing 100083China No.11 Gold Geological Party of the CAPF Lasa 850000China School of Earth and Ocean Sciences Cardiff UniversityCardiffCF10 3ATUK School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China School of Resources and Materials Northeastern University at Qinhuangdao BranchQinhuangdao 066004China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China

The Tashisayi nephrite deposit is located in South Altyn *** Qiemo County,Xinjiang Province,northwest *** is a recent discovery in the vast,well-known Kunlun-Altyn nephrite belt distributed along the south of the Tarim Basin,producing more than half of the nephrite from the whole belt in *** investigations revealed that it is a dolomitic marble-related(D-type)nephrite deposit,but little is known about its age of formation and relationships between the granites and *** we report field investigations,petrography of the neph rite,as well as petrography,geochemistry,geochronology of the zoisite-quartz altered intrusive rock and adjacent *** A-type granite is identified with a SHRIMP U-Pb zircon age of 926±7 Ma,suggesting it was emplaced in an extensional tectonic environment at that *** altered intrusive rock has a cluster of U-Pb zircon age of 433±10 *** similar trace element features to the A-type granite,suggesting it was formed in an extensional regime at this later *** formed because of the metasomatism of dolomite marble by hydrothermal *** is inferred that Ca^2+was released from the dolomitic marble by metasomatism forming Ca-rich fluids,which caused alteration of both the intrusive rocks(6.00-8.22 wt.%CaO)and granite(1.76-3.68 wt.%CaO)near the nephrite ore *** is also inferred that Fe^2+from the granite migrated towards the dolomite *** fluids gave rise to the formation of *** as zoisite,in the nephrite and altered intrusive rock,and epidote in the *** on the contact *** in hydrothermal processes,and consumption of Ca^2+,the Tashisayi nephrite is considered to have formed at the same time as the alteration of the intrusive rocks,i.e.~433 *** geochronological similarity(~926 Ma.433 Ma)of South Altyn and North Qaidam may suggest that tectonically they belong to one single complex in the past,which was offset by the Altyn Tagh fault(ATF).The similar

关键词： Nephrite Dolomite marble A-type granite Altyn Tagh fault Zircon U-Pb dating

Performance of RegCM4 over Major River Basins in China

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Advances in Atmospheric Sciences 2017年第4期34卷 441-455页

作者： Xuejie GAO Ying SHI Zhenyu HAN meili wang Jia WU Dongfeng ZHANG Ying XU Filippo GIORGI Climate Change Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China National Climate Center China Meteorological AdministrationBeijing 100081China China Meteorological News Press China Meteorological AdministrationBeijing 100081China Shanxi Climate Center Taiyuan 030006China The Abdus Salam International Centre for Theoretical Physics Trieste 34100Italy

A long-term simulation for the period 1990–2010 is conducted with the latest version of the International Centre for Theoretical Physics＇ Regional Climate Model（RegCM4）, driven by ERA-Interim boundary conditions at a grid spacing of 25 km. The Community Land Model（CLM） is used to describe land surface processes, with updates in the surface parameters,including the land cover and surface emissivity. The simulation is compared against observations to evaluate the model performance in reproducing the present day climatology and interannual variability over the 10 main river basins in China,with focus on surface air temperature and precipitation. Temperature and precipitation from the ERA-Interim reanalysis are also considered in the model assessment. Results show that the model reproduces the present day climatology over China and its main river basins, with better performances in June–July–August compared to December–January–February（DJF）.In DJF, we find a warm bias at high latitudes, underestimated precipitation in the south, and overestimated precipitation in the north. The model in general captures the observed interannual variability, with greater skill for temperature. We also find an underestimation of heavy precipitation events in eastern China, and an underestimation of consecutive dry days in northern China and the Tibetan Plateau. Similar biases for both mean climatology and extremes are found in the ERA-Interim reanalysis, indicating the difficulties for climate models in simulating extreme monsoon climate events over East Asia.

关键词： regional climate model RegCM4 China river basin CLM

Establishment of a transgenic mouse model with liver-specific expression of secretory immunoglobulin D

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Science China(Life Sciences) 2012年第3期55卷 219-227页

作者： wang Ping WEI ZhiGuo YAN BoWen HUANG Tan GOU KeMian DAI YunPing ZHENG Min wang meili CHENG XueQian wang XiFeng XU Chen SUN Yi College of Biological Sciences China Agricultural UniversityState Key Laboratories for AgrobiotechnologyBeijing 100193China College of Animal Science&Technology Henan University of Science and TechnologyHenan 471003China

Mutation of mevalonate kinase （MVK） is thought to account for most cases of hyperimmunoglobulinemia D syndrome （HIDS） with recurrent fever. However, its mechanism and the relationship between elevated serum immunoglobulin D （IgD） and the clinical features of HIDS are unclear. In this study, we generated by fusion PCR a vector to express high levels of chimeric secretory IgD （cslgD） specifically in the liver. We then generated seven founder lines of transgenic mice by co-microinjection, and verified them using genomic PCR and Southern blotting. We detected the expression of csIgD by reverse transcription PCR, quantitative PCR, western blotting, and enzyme-linked immunosorbent assays. We demonstrated that csIgD could be specifically and stably expressed in the liver. We used flow cytometry to show that overexpression of csIgD in the bone marrow and spleen cells had no effect on B cell development. Morphologic and anatomical observation of the transgenic mice revealed skin damage, hepatosplenomegaly, and nephromegaly in some transgenic mice; in these mice, pathological sections showed high levels of cell necrosis and protein-like sediments in the liver, spleen, and kidney. We demonstrated that the genomic insertion sites of the transgeues did not disrupt the MVK gene on mouse chromosome 5. This transgenic mouse will be useful to explore the pathogenesis of HIDS.

关键词： sIgD liver-specific expression vector HIDS MVK

通则上的民商合一与各商事单行法独立并行——中国商事立法模式的选择

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政治与法律 2006年第3期 119-125页

作者：王玫黎西南政法大学经贸法学院重庆400031

在商事立法模式的选择中,各国的特定历史背景占据了重要地位。同时,民法与商法的关系发展也不容忽视。中世纪商人法的出现使民商分立立法模式的建立有了可能,但即使在大陆法系国家对民商分立也并非得到贯彻,民商合一模式成为当前的立法... 详细信息

在商事立法模式的选择中,各国的特定历史背景占据了重要地位。同时,民法与商法的关系发展也不容忽视。中世纪商人法的出现使民商分立立法模式的建立有了可能,但即使在大陆法系国家对民商分立也并非得到贯彻,民商合一模式成为当前的立法主流。有没有形式意义上的商法丝毫不会影响商法学科的发展,而有没有实质意义上的商法才是商法存在与否的关键。在我国,制订《商事通则》不具有必要性与现实性。

关键词：商事立法模式民商合一民商分立《商事通则》《民法典》

Experimental investigation of time-dependent cavitation in an oscillatory squeeze film

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Science China(Physics,Mechanics & Astronomy) 2004年第z1期47卷 107-112页

作者： CHEN Xiaoyang, SUN meili, wang Wen, D. C. SUN, ZHANG Zhiming & wang XiaojingResearch Institute of Bearings, Shanghai University, Shanghai 200072, China Department of Mechanical Engineering, State University of New York at Binghamton, NY 13902-6000, USA 1. Research Institute of Bearings Shanghai University 200072 Shanghai China 2. Department of Mechanical Engineering State University of New York at Binghamton 13902-6000 NY USA

The occurrence of time-dependent cavitation and tensile stress in an oscillatory oil squeeze film were investigated experimentally. The test apparatus was a simple thrust bearing consisting of two parallel circular plates separated by a thin viscous oil film. During the test, one plate was at rest while tne other (transparent) oscillated in a direction normal to its surface. This test configuration was chosen to avoid the rotational motion and complicated geometry of a squeeze film Journal bearing. The frequency of oscillation was in the range of 5 to 50 Hz and was controlled by an electro-magnetic exciter. The process of cavity formation and its subsequent development was recorded by a high-speed video camera. Concomitant pressure in the oil film was measured both within and without the cavitation region. It was found that both tensile stress and cavities existed in a squeeze film under certain working conditions.

关键词： dynamically loaded journal bearing, squeeze film effect, time-dependent cavitation.