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| 1 | Analysis of characteristics and mechanism of current system on the west coast of Guangdong of China in summer显示文摘On the basis of data of drifting bottles’ tracks and the current measured in anchored stations, as well as temperature and salinityobserved in cruise investigations and coastal stations, ADCP current data and AVHRR surface sea temperature (SST) data on thewestern coast of Guangdong, synthetic results of analysis showed that the coastal currents in the west of the mouth of the ZhujiangRiver were mainly westward in summer, which constituted the north branch of cyclonic gyre in the east of the Qiongzhou Straits. Partof its water flowed westward into the Beibu Gulf through the Qiongzhou Straits. The coastal current pattern was not identical with thetraditional current system which flowed westward in the Qiongzhou Straits in winter and eastward in summer. The summertime’ scoastal current was always westward, maybe temporarily turning northeast only when the southwest wind was strong. The importantcharacteristics of coastal current on the western coast of Guangdong, in the Qiongzhou Straits and in the north of the Beibu Gulf wereanalyzed and their mechanisms also were explained. | BAO Xianwen HOU Yijun CHEN Changshen CHEN Fei SHI Maochong | 2005 | Acta Oceanologica Sinica2005，24，4： | 16 |
| 2 | Optimization and control of a reactive distillation process for the synthesis of dimethyl carbonate显示文摘Dimethyl carbonate is an environmentally benign and biodegradable chemical.Based on integration of reactive distillation and pressure-swing distillation technologies,a novel process for synthesis of dimethyl carbonate through transesterification with propylene carbonate and methanol has been developed by Huang et al.In this work,the optimization of this process was performed by minimizing the total TAC.The results show that the optimal design flowsheet can save energy consumption by 18.6% with the propylene carbonate conversion of 99.9%.Then,an effective plant-wide control structure for the process was developed.Dynamic simulation results demonstrate that the temperature/flow rate cascade control plus with simple temperature control can keep not only product purity but also the conversion of the reactant at their desired values in the face of the disturbance in reactant feed flow rate and feed composition. | Zhixian Huang Yixiong Lin Xiaoda Wang Changshen Ye Ling Li | 2017 | Chinese Journal of Chemical Engineering2017，25，8： | 8 |
| 3 | Preparation and shaping of solid acid SO_4^(2-)/TiO_2 and its application for esterification of propylene glycol monomethyl ether and acetic acid显示文摘The solid acid SO_4^(2-)/TiO_2 was prepared by immersion method and applied for synthesis of propylene glycol methyl ether acetate(PMA) through esterification reaction of propylene glycol monomethyl ether(PM)and acetic acid(HAc). The optimal catalyst preparation condition was determined by orthogonal analysis of parameters in a five-factor and four-level test. The obtained solid acid catalysts were characterized in detail by means of X-ray powder diffraction, thermogravimetry, pyridine adsorbed IR analysis, scanning electron microscopy, and BET surface area method. Synthesis of PMA was studied in this paper through experimental investigation of reaction conditions such as temperature, molar ratio of reactants, catalyst dosage and agitation speed. Based on its possible reaction mechanism, a pseudo-homogeneous kinetic model was established and its activation energies E_a^+ and E_a^-,65.68 × 10~3J·mol^(-1) and 57.78 × 10~3J·mol^(-1), were estimated. To prepare shaped solid acid catalyst SO_4^(2-)/TiO_2, the shaping method of impregnation–shaping–impregnation was applied. The optimal molding formulation of solid acid catalyst, obtained from the orthogonal test, was found to be binder 7 wt%, reinforcing agent 20 wt%, pore forming material 2.5 wt%, and lubricant 4 wt%.The results of performance test of catalyst demonstrated that the shaped solid acid catalyst exhibited high activity and stability. | Zhixian Huang Yixiong Lin Ling Li Changshen Ye Ting Qiu | 2017 | Chinese Journal of Chemical Engineering2017，25，9： | 8 |
| 4 | Water protection in the western semiarid coal mining regions of China: A case study显示文摘The coal industry in China has been moving from the semiarid eastern to the drier western regions since the beginning of this century.Water protection is of the utmost concern for coal mining in these regions.Lu'an,as one of the state coal mining bases in China,has been seeing increasingly heavier pressure for the protection of water resources.This article considers Lu'an as an example and describes the ways these concerns may be alleviated.High mine-water utilization rates have effectively reduced wasting of water and,consequently,have reduced water demand.Using the top layers of the Ordavician as aquifuge barriers can prevent floor karst water inrush into the longwall face and can protect the regional Ordovician karst water resources at the same time.The strength of the overlying Quaternary clay can protect against roof collapse and has successfully preserved the Quaternary porous water resource. | Huang Hanfu Wang Changshen Bai Haibo Wang Zihe | 2012 | International Journal of Mining Science and Technology2012，22，5： | 5 |
| 5 | CONTRACTED EFFECT OF BELL-SHADE SHAPE WELDING ARC AND ACCOMPANIED MAGNETIC FIELD WITH SPIRAL PIPE SHAPE显示文摘CONTRACTEDEFFECTOFBELLSHADESHAPEWELDINGARCANDACCOMPANIEDMAGNETICFIELDWITHSPIRALPIPESHAPE①YuJianrong,ZhangJiaying,JiangLipei,... | Yu Jianrong, Zhang Jiaying , Jiang Lipei, Jiao Xiangdong Beijing Institute of Petrochemical Technology, Beijing 102600 Department of Mechanical Engineering,Tsinghua University, Beijing 100084 Jia Changshen, Shi Yaowu Xi′an Jiaotong University, | 1997 | 中国有色金属学会会刊:英文版1997，7，2： | 4 |
| 6 | Origin and evolution of ore-forming fluid for the Gaosongshan gold deposit, Lesser Xing’an Range:Evidence from fluid inclusions,H-O-S-Pb isotopes显示文摘Epithermal gold deposits are typical precious metal deposits related to volcanic and subvolcanic magmatism.Due to the lack of direct geological and petrographic evidences,the origin of the ore-forming fluid is deduced from the spatial diagenesis-mineralization relationship,chronological data,physicochemical characteristics of mineral fluid inclusions,mineral or rock elements and isotopic geochemical characteristics.By objectively examining this scientific problem via a geological field survey and petrographic analysis of the Gaosongshan epithermal gold deposit,we recently discovered and verified the following points:(1) Pyrite-bearing spherical quartz aggregates (PSQA) occur in the rhyolitic porphyry;(2) the mineralization is structurally dominated by WNW- and ENE-trending systems and occurs mostly in hydrothermal breccias and pyrite-quartz veins,and the ore types are mainly hematite-crusted quartz,hydrothermal breccia,massive pyrite-quartz,etc.;(3) the alteration types consist of prevalent silicification,sericitization,propylitization and carbonation,with local adularization and illitization.The ore minerals are mainly pyrite,primary hematite,native gold,and electrum,with lesser amounts of chalcopyrite,magnetite,sphalerite,and galena,indicating a characteristic epithermal low-sulfidation deposit.The ore-forming fluid may have been primarily derived from magmatic fluid exsolved from a crystallizing rhyolitic porphyry magma.Further zircon U-Pb geochronology,fluid inclusion,physicochemical and isotopic geochemical analyses revealed that (1) rhyolitic porphyry magmatism occurred at 104.6 ± 1.0 Ma,whereas the crystallization of the PSQA occurred at 100.8 ± 2.1 Ma;(2) the hydrothermal fluid of the pre-ore stage was an exsolved CO2-bearing H2O-NaCl magmatic fluid that produced inclusions mainly composed of pure vapor (PV),vapor-rich (WV) and liquid-rich (WL) inclusions with a small number of melt-(M) and solid-bearing (S) inclusions;mineralization-stage quartz contains WL and rare PV,WV and pure liquid (PL) inclusions characterized by the H2O-NaCl system with low formation temperatures and low salinities;(3) the characteristics of hydrogen,oxygen,sulfur,and lead isotopes and those of rare earth elements (REEs) provide insight into the affinity between PSQA and orebodies resulting from juvenile crust or enriched mantle.Combined with previous research on the mineralogenetic epoch (99.32 ± 0.01 Ma),we further confirm that the mineralization of the deposit occurred in the late Early Cretaceous,which coincides with the extension of the continental margin induced by subduction of the Pacific Plate beneath the Eurasian Plate.The formation of the ore deposit was proceeded by a series of magmatic and hydrothermal events,including melting of enriched juvenile crust,upwelling,the eruption and emplacement of the rhyolitic magma,the exsolution and accumulation of magmatic hydrothermal fluid,decompression,the cooling and immiscibility/boiling of the fluid,and mixing of the magmatic fluid with meteoric water,in association with water-rock interaction. | Yang Liu Jinggui Sun Jilong Han Liang Ren Alei Gu Keqiang Zhao Changshen Wang | 2019 | Geoscience Frontiers2019，10，5： | 3 |
| 7 | Novel multi–SO_(3)H functionalized ionic liquids as highly efficient catalyst for synthesis of biodiesel显示文摘Biodiesel is an attractive alternative to fossil fuels due to the energy and environmental concerns. In this paper, seven different multi –SO_(3)H functionalized ILs based on the low-cost less-substituted amines, which contained massive sites for functionalization of sulfonic acid groups and further treatment of sulfonate-based anions, were prepared as catalysts with high acidity and desirable catalytic activity for the synthesis of biodiesel from the esterification of oleic acid with methanol. The physicochemical properties of these acidic ILs were characterized by a variety of analytical techniques such as FT-IR, EA, TGA, and the Br?nsted acidity was well determined by UV–vis. Among the ILs prepared, [EDA-PS][P-TSA] showed the highest catalytic activity for esterification due to its high acidity and appropriate miscibility with reactants, with an ultrahigh97.58% conversion of oleic acid under the optimum conditions(i.e. reaction time, 1.8 h;catalyst amount, 3 wt%;alcohol/acid molar ratio, 13:1,temperature 70℃) acquired from the Box–Behnken response surface methodology. With the novel strategy of multi –SO_(3) H modification on ILs,our catalyst had an approaching or even superior oleic acid conversion rate compared to other reported catalysts with considerably lower catalyst dosage and shorter reaction time. More importantly, it also exhibited high generality for converting various FFA feedstocks into biodiesel with considerable conversion within 93.59–94.33% under a rather lower catalyst dosage, which showed the valuable potential for converting low-cost oils into biodiesel from an economic and environmental perspective. | Meichen Li Jie Chen Ling Li Changshen Ye Xiaocheng Lin Ting Qiu | 2021 | Green Energy & Environment2021，6，2： | 1 |
| 8 | Cryptosporidium spp. in pet birds: Genetic diversity and potential public health significance显示文摘 | Meng Qi Rongjun Wang Changshen Ning Xiaoyu Li Longxian Zhang Fuchun Jian Yanru Sun Lihua Xiao | 2011 | Experimental Parasitology2011，，4： | 1 |
| 9 | A finite volume numerical approach for coastal circulation studies:Comparisons with finite difference models显示文摘 | Chen Changshen Huang Haosheng Beardsley Robert C | 2007 | Journal of Geophysical Research2007，112，03018： | 1 |
| 10 | Adsorption ther-modynamics and kinetics of p-xylene on activated carbon显示文摘 | Ting Qiu Yu Zeng Ye Changshen | 2012 | Journal of Chemical and Engineering Data2012，57，5： | 1 |
| 11 | Evaluation of the biocompatibility of a nonceramic hydroxyapatite显示文摘 | LIU Changshen WANG Wengbo SHEN Wei | 1997 | Endodontics1997，23，8： | 1 |
| 12 | Serum lipid levels and the risk of biliary tract cancers and biliary stones: A population‐based study in China显示文摘 | GabriellaAndreotti JinboChen Yu‐TangGao AsifRashid Shih‐ChenChang Ming‐ChangShen Bing‐ShengWang Tian‐QuanHan Bai‐HeZhang Kim N.Danforth Michelle D.Althuis Ann W.Hsing | 2008 | Int J Cancer2008，，10： | 1 |
| 13 | Cryptosporidium tyzzeri n. sp. (Apicomplexa: Cryptosporidiidae) in domestic mice ( Mus musculus )显示文摘 | Xupeng Ren Jinfeng Zhao Longxian Zhang Changshen Ning Fuchun Jian Rongjun Wang Chaochao Lv Qiang Wang Michael J. Arrowood Lihua Xiao | 2011 | Experimental Parasitology2011，，3： | 1 |
| 14 | Prevalence of Cryptosporidium baileyi in ostriches ( Struthio camelus ) in Zhengzhou, China显示文摘 | Rongjun Wang Meng Qi Zhu Jingjing Dong Sun Changshen Ning Jinfeng Zhao Longxian Zhang Lihua Xiao | 2010 | Veterinary Parasitology2010，，1： | 1 |
| 15 | Cervine genotype is the major Cryptosporidium genotype in sheep in China显示文摘 | Yongli Wang Yaoyu Feng Bin Cui Fuchun Jian Changshen Ning Rongjun Wang Longxian Zhang Lihua Xiao | 2010 | Parasitology Research2010，，2： | 1 |
| 16 | An efficient method for the synthesis of benzoquinoline and benzo phenanthridine derivatives catalyzed by iodine by a three-component reaction of arenecarbaldehyde, naphthalen-2-amine and cyclic ketone显示文摘 | Wang Xiangshan Li Qing Yao Changshen | 2008 | Eur J Org Chem2008，，20： | 1 |
| 17 | An UnstructuredGrid, Finite-Volume, Three-Dimensional, Primitive Equations Ocean Model: Application to Coastal O- cean and Estuaries显示文摘 | Chen Changshen Liu Hedong | 2003 | Journal of Atmospheric and Oceanic Technology2003，20，： | 1 |
| 18 | Polymeric ionic liquids(PILs)with high acid density:Tunable catalytic performance for biodiesel production显示文摘A series of polymeric ionic liquids(PILs)used as effective heterogeneous catalysts for biodiesel production via esterification of free fatty acids(FFAs)were effectively prepared by the reaction of poly(ethylene imine)(PEI)polymers with different molecular weight and 1,3-propanesultone,followed by the further acidification with differential effective acids,i.e.H2SO4,CF3SO3H,CH3SO3H or p-toluenesulfonic acid(p-TSA).Ultrahigh acidity and catalytic performance were achieved and could be fine-tuned by simply adjusting the molecular weight of PEI and by further treatment of acids.Specifically,under the optimal conditions(i.e.reaction temperature was 70℃,reaction time was 2.0 h,catalyst dosage was 3.15%(mass),and alcohol/acid molar ratio was 14:1)acquired through the Box-BEHNKEN response surface methodology,a high oleic acid conversion of 98.42%could be obtained over the optimal PIL,PEI(70000)-PS-p-TSA.Additionally,our PILs also showed high generality for esterification of other FFAs,with general high conversion over 90%noted in each case even under much milder reaction conditions compared to other conventional catalysts. | Xiaocheng Lin Youjie Huang Ling Li Changshen Ye Jie Chen Ting Qiu | 2021 | Chinese Journal of Chemical Engineering2021，34，10： | 1 |
| 19 | Comparison between bearing characteristics of pervious concrete pile composite foundations with different replacement ratios显示文摘The replacement ratio is an essential factor in evaluating the bearing capacity characteristics of compositefoundations. This study focuses on the bearing capacity of a pervious concrete pile with different replacementratios. The axial force, skin friction, and settlement were evaluated using a model test to assess the performance ofthe pervious concrete pile composite foundation. When the replacement ratio was reduced from 9.26% to 2.32%,the characteristic bearing capacity value was only 14%. Therefore, it may be unreasonable to use the settlementratio method to evaluate this composite foundation's bearing capacity in a model test. Appropriate loading cansignificantly improve the bearing capacity of a pervious concrete pile composite foundation with a lowreplacement ratio. The pile–soil stress ratio exhibited different decreasing ranges in the later loading stage. As theload increased, the axial force of the pervious concrete piles was small and nonobvious, and the average sidefriction resistance of the piles in the foundation with a lower replacement ratio slowly increased. | Han Xia Guangyin Du Jun Cai Changshen Sun | 2023 | Geohazard Mechanics2023，1，3： | 0 |
| 20 | Facile one-pot synthesis of a BiOBr/Bi_(2)WO_(6) heterojunction with enhanced visible-light photocatalytic activity for tetracycline degradation显示文摘Photocatalytic removal of tetracycline(TC)from the wastewater is of great value in the chemical and environmental engineering field.Here,we introduced a facile one-step method for the synthesis of BiOBr/Bi2WO6 heterojunctions by using cheap CTAB as the Br source.We showed the possibility of our method to fine-tune the content of BiOBr in the produced BiOBr/Bi2WO6 by simply changing the dosage of cetyltrimethylammonium bromide(CTAB),providing a platform for the delicate tuning of the visiblelight absorbance ability of the composites.With a suitable heterojunction structure of BiOBr/Bi2WO6-0.2,it exhibited an ultrarapid photocatalytic activity towards TC(20 mgL^(-1)),with a competitive removal efficiency of 88.1%within 60 min and an ultrahigh removal rate of 0.0349 min^(-1).It could also be robustly recycled for at least 5 cycles with slight removal efficiency loss.We demonstrated that this exciting photocatalytic performance was due to the highly decreased recombination of photoinduced electrons and holes on our composites by constructing this heterojunction structure,and the resultingOH andO^(-)_(2)contributed to the effective degradation of TC to CO_(2). | Duanlian Tang Xiaoyan Chen Jiayan Yan Zhuo Xiong Xiaoyu Lou Changshen Ye Jie Chen Ting Qiu | 2023 | Chinese Journal of Chemical Engineering2023，53，1： | 0 |
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