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| 1 | Effect of Hot Isostatic Pressing Conditions and Cooling Rate on Microstructure and Properties of Ti-6Al-4V Alloy from Atomized Powder显示文摘The effects of temperature and pressure on density, microstructure and mechanical properties of powder compacts during hot isostatic pressing(HIPping) were investigated. Optimized HIPping parameters of temperature range from 900 to 940℃, pressure over 100 MPa and holding time of 3 h, were obtained. Tensile properties after different heat treatments show that both the geometry of samples and cooling rate have a significant influence on mechanical properties. Finite element method was used to predict the temperature field distribution during HIPped sample cooling, and the experimental results are in agreement with simulation prediction. The interaction of HIPping parameters was analyzed based on the response surface methodology(RSM) in this study. | Lei Xu Ruipeng Guo Chunguang Bai Jiafeng Lei Rui Yang | 2014 | Journal of Materials Science & Technology2014，30，12： | 24 |
| 2 | World-class Xincheng gold deposit: An example from the giant Jiaodong gold province显示文摘The Jiaodong gold deposits are currently the most important gold resources(with Au reserves of>4000 t) in China,and the leading gold-producing country globally(with Au production of ~428 t in2013).Jiaodong is also considered as perhaps the only world-class to giant gold accumulation on the planet where relatively young gold ores(ca.130-120 Ma) were deposited in rocks that are 2 Ga older.The Xincheng world-class high-grade gold deposit,with a proven reserve of >200 t gold,is one of the largest deposits in the giant gold province of the Jiaodong Peninsula.It is located in the northwestern part of the jiaobei Uplift,and hosted by ca.132-123 Ma Xincheng quartz monzonites and monzogranites.Ore zones are structurally controlled by the NE-trending and NW-dipping Jiaojia Fault and subsidiary faults,and are mainly restricted to the footwall of the fault.The dominant disseminated- and stockworkstyle ores are associated with strong sericitization,silicification,sulfidation and K-feldspathization,and minor carbonate wallrock alteration halos.The four mineralization stages are pyrite-quartz-sericite(stage 1),quartz-pyrite(stage 2),quartz-polysulfide(stage 3) and quartz-carbonate(stage 4).Gold occurs dominantly as electrum,with lesser amounts of sulfide-hosted native gold and rare native silver and argentite,normally associated with pyrite,chalcopyrite,galena and sphalerite:the latter with proven resources of about 105 t Ag,713 t Cu,and 5100 t S.There are three types of ore-related fluid inclusions:type 1 aqueous-carbonate(H_2O-CO_2),type 2aqueous(liquid H_2O+vapor H_2O),and type 3 CO_2(liquid CO_2 and vapor CO_2) inclusions.Homogenization temperatures range from 221 to 304℃ for type 1 inclusions,with salinities of 2.4-13.3 wt.%NaCl eq.,and bulk densities of 0.858-1.022 g/cm^3.The δ^(34)S_(CDT) values of hydrothermal sulfides are 4.3-10.6‰and δ^(18)O values of hydrothermal quartz have a median value of 13.0‰.δD values of fluid inclusions in hydrothermal quartz have a median value of-75‰.Calculated δ^(18)Owater has a median value of 5.2‰.The timing of gold mineralization at the Xincheng gold deposit is younger than 123±1 Ma,and likely between 120.9 and 119.9 Ma.A minerals system genetic model for the probable epizonal orogenic Xincheng deposit suggests an initial medium temperature,CO_2-rich,and low salinity H_2O-CO_2 deeply sourced metamorphic ore fluid associated with dehydration and decarbonization of subducting Paleo-Pacific lithosphere.The Jiaojia Fault constrained the migration of ore-forming fluids and metals at the brittle-ductile transition.Fluid immiscibility,caused by episodic pressure drops,led to significant high-grade gold deposition in the giant Xincheng gold deposit. | Liqiang Yang Jun Deng Ruipeng Guo Lin'nan Guo Zhongliang Wang Binghan Chen XudongWang | 2016 | Geoscience Frontiers2016，7，3： | 14 |
| 3 | Effect of Hot Isostatic Pressing Loading Route on Microstructure and Mechanical Properties of Powder Metallurgy Ti_2AlNb Alloys显示文摘In this work, hot isostatic pressing(HIPing) technique was used to densify the Ti_2AlNb pre-alloyed powder.The influence of HIPing loading route parameters(temperature and rates of heating and pressurizing)on microstructure and properties of PM Ti_2AlNb alloys was studied. The results showed that HIPing loading route parameters affected the densification process and mechanical properties(especially high temperature rupture lifetime) of PM Ti_2AlNb alloys in the present work. A finite element method(FEM) model for predicting the final densification was developed and was used to optimize the HIPing procedure. | Jie wu Ruipeng Guo Lei Xu Zhengguan Lu Yuyou Cui Rui Yang | 2017 | Journal of Materials Science & Technology2017，33，2： | 10 |
| 4 | Use of land's cooperative object to estimate UAV's pose for autonomous landing显示文摘The research of unmanned aerial vehicles’(UAVs’)autonomy navigation and landing guidance with computer vision has important signifcance.However,because of the image blurring,the position of the cooperative points cannot be obtained accurately,and the pose estimation algorithms based on the feature points have low precision.In this research,the pose estimation algorithm of UAV is proposed based on feature lines of the cooperative object for autonomous landing.This method uses the actual shape of the cooperative-target on ground and the principle of vanishing line.Roll angle is calculated from the vanishing line.Yaw angle is calculated from the location of the target in the image.Finally,the remaining extrinsic parameters are calculated by the coordinates transformation.Experimental results show that the pose estimation algorithm based on line feature has a higher precision and is more reliable than the pose estimation algorithm based on points feature.Moreover,the error of the algorithm we proposed is small enough when the UAV is near to the landing strip,and it can meet the basic requirements of UAV’s autonomous landing. | Xu Guili Qi Xiaopeng Zeng Qinghua Tian Yupeng Guo Ruipeng Wang Biao | 2013 | Chinese Journal of Aeronautics2013，26，6： | 8 |
| 5 | Size and elemental composition of dry-deposited particles during a severe dust storm at a coastal site of Eastern China显示文摘Dry-deposited particles were collected during the passage of an extremely strong dust storm in March, 2010 at a coastal site in Qingdao(36.15°N, 120.49°E), a city located in Eastern China. The size, morphology, and elemental composition of the particles were quantified with a scanning electron microscope equipped with an energy dispersive X-ray instrument(SEM–EDX). The particles appeared in various shapes, and their size mainly varied from 0.4to 10 μm, with the mean diameters of 0.5, 1.5, and 1.0 μm before, during, and after the dust storm, respectively. The critical size of the mineral particles settling on the surface in the current case was about 0.3–0.4 μm before the dust storm and about 0.5–0.7 μm during the dust storm. Particles that appeared in high concentration but were smaller than the critical size deposited onto the surface at a small number flux. The elements Al, Si and Mg were frequently detected in all samples, indicating the dominance of mineral particles. The frequency of Al in particles collected before the dust storm was significantly lower than for those collected during and after the dust storm. The frequencies of Cl and Fe did not show obvious changes, while those of S, K and Ca decreased after the dust arrival. These results indicate that the dust particles deposited onto the surface were less influenced by anthropogenic pollutants in terms of particle number. | Hongya Niu Daizhou Zhang Wei Hu Jinhui Shi Ruipeng Li Huiwang Gao Wei Pian Min Hu | 2016 | Journal of Environmental Sciences2016，28，2： | 4 |
| 6 | Evaluation of the Biodiversity Conservation Function in Liaohe Delta Wetland,Northeastern China显示文摘The scientific evaluation of the wetland biodiversity conservation function is the basis of balanced wetland protection and development. Our research sought to provide references for the protection of wetland ecological environments as well as the related planning and management policies. The study established a fitting model for evaluating the biodiversity conservation function in the Liaohe Delta, northeastern China. The new model, the Wetland Biodiversity Conservation Indicator(WBCI), was with four input factors, including the vegetation coverage(VC), habitat suitability index(HI), land use and land cover(LULC) index(LI), and threat factor index(TI) of the LULC type. The values assigned to HI and TI were based on Integrated Valuation of Ecosystem Services and Tradeoffs(In VEST)habitat quality models. The weights of all the factors in WBCI were valued with the Principal Component Analysis(PCA). We evaluated the wetland biodiversity conservation function of Panjin, Liaohe Delta, China, by using the WBCI model based on Gaofen-1(GF-1) satellite data in 2018, and the result was verified with In VEST and other models. It showed that the output map was similar to that of In VEST, with the higher-quality habitat including the wetland, tidal flat, water body, and forest, as well as the lower-quality land use types including the paddy field, crop field, construction land, and land used by traffic. The wetland biodiversity conservation function was better in areas less affected by human disturbance, with very abundant species and good-quality habitat. It was poor in areas impacted by more frequent human activities such as the land cultivation, housing, and traffic, which led to the landscape fragmentation. The WBCI model provided a more accurate reflection of the bird distribution than the In VEST model. The WBCI model was able to reflect the difference in quality of each habitat grade, in contrast to the net primary productivity(NPP) method and species distribution models(SDMs). The new model was, therefore, simpler and suitable in reflecting the quality of wetland biodiversity function in the Liaohe Delta. | Wenying YU Ruipeng JI Xiuzhen HAN Long CHEN Rui FENG Jinwen WU Yushu ZHANG | 2020 | Journal of Meteorological Research2020，34，4： | 4 |
| 7 | Anionic structural effect in liquid–liquid separation of phenol from model oil by choline carboxylate ionic liquids显示文摘Phenolic compounds exist in crude oil as pollutants, and their removal is vital important for the refining and further application of oils. In traditional separation approaches, strong acid and strong base have to be used to remove these compounds, which may cause serious environmental problems. In this work, 19 kinds of cholinium ionic liquids have been developed to separate phenol from model oil by liquid–liquid extraction. Structural effect of anions of the ionic liquids in the separation is systematically investigated. It is found that depending on the chemical structure of ionic liquids, phenol can be removed from toluene with single-step removal efficiency from 86 to 99% under optimal conditions. The type of substituent groups and the-CH_2 number between two carboxylates have obvious effect on the removal efficiency, and more hydrophilic ionic liquids have a stronger extraction performance for phenol. Furthermore, thermodynamic,^(13) C NMR,~1 H NMR and density functional theory calculations have been performed to characterize the extraction process and to understand the extraction mechanism. It is shown that the extraction of phenol from oil to ionic liquid is a favorable process, and this process is mainly driven by enthalpy change. The formation of the hydrogen bond between anion of the ionic liquid and-OH of phenol is the main driving force for the extraction of phenol from oil to the ionic liquids. | Zhiyong Li Ruipeng Li Xiaoqing Yuan Yuanchao Pei Yuling Zhao Huiyong Wang Jianji Wang | 2019 | Green Energy & Environment2019，4，2： | 4 |
| 8 | Effect of potential HONO sources on peroxyacetyl nitrate(PAN)formation in eastern China in winter显示文摘As an important secondary photochemical pollutant,peroxyacetyl nitrate(PAN)has been studied over decades,yet its simulations usually underestimate the corresponding observations,especially in polluted areas.Recent observations in north China found unusually high concentrations of PAN during wintertime heavy haze events,but the current model still cannot reproduce the observations,and researchers speculated that nitrous acid(HONO)played a key role in PAN formation.For the first time we systematically assessed the impact of potential HONO sources on PAN formation mechanisms in eastern China using the Weather Research and Forecasting/Chemistry(WRF-Chem)model in February of 2017.The results showed that the potential HONO sources significantly improved the PAN simulations,remarkably accelerated the RO x(sum of hydroxyl,hydroperoxyl,and organic peroxy radicals)cycles,and resulted in 80%–150%enhancements of PAN near the ground in the coastal areas of eastern China and 10%–50%enhancements in the areas around 35–40°N within 3 km during a heavy haze period.The direct precursors of PAN were aldehyde and methylglyoxal,and the primary precursors of PAN were alkenes with C>3,xylenes,propene and toluene.The above results suggest that the potential HONO sources should be considered in regional and global chemical transport models when conducting PAN studies. | Jingwei Zhang Yitian Guo Yu Qu Yong Chen Ruipeng Yu Chaoyang Xue Rui Yang Qiang Zhang Xingang Liu Yujing Mu Jing Wang Can Ye Haihan Zhao Qiangqiang Sun Ziwen Wang Junling An | 2020 | Journal of Environmental Sciences2020，32，8： | 3 |
| 9 | Choline-based ionic liquids for CO_2 capture and conversion显示文摘Choline-based ionic liquids(Ch-ILs) with anions possessing interacting sites to attract CO_2 were designed, which could capture CO_2 with capacity >1.0 mol CO_2 per molar IL under ambient conditions. Moreover, this kind of ILs combining with Cu Cl could catalyze the formylation of amines with CO_2/H_2 at 120 °C. Especially, choline imidazolate showed the best performance,affording a series of N-formamides in excellent yields. It was demonstrated that the IL activated CO_2 and the synergistic effect between the IL and Cu Cl resulted in the high activity for catalysing the formylation of amines with CO_2/H_2. | Ruipeng Li Yanfei Zhao Zhiyong Li Yunyan Wu Jianji Wang Zhimin Liu | 2019 | Science China Chemistry2019，62，2： | 3 |
| 10 | Dynamic Response of Phragmites australis and Suaeda salsa to Climate Change in the Liaohe Delta Wetland显示文摘Because of its unique geographical location and ecological function, the Liaohe Delta Wetland is important in maintaining regional ecological balance and security. Monitoring and evaluating changes in the wetland are therefore of great importance. We used medium-and high-resolution satellite data, meteorological station data, and site measurement data to analyze changes in the area and spatial distribution of Phragmites australis and Suaeda salsa in the Liaohe Delta Wetland from 1998 to 2017, as well as their growth response to the climate change. The results showed that during 1998–2017, the areas of both P. australis and S. salsa wetlands alternated through periods of decreasing,increasing, and then decreasing trends. The annual change in the area and spatial distribution range of S. salsa fluctuated more than that of P. australis. The annual variation of normalized difference vegetation index(NDVI) in P. australis wetland showed an upward trend from 1998 to 2017. The area of P. australis cover that was improved, unchanged, and decreased accounted for 81.8%, 12.3%, and 5.9%, respectively, of the total area;evaporation and wind speed were the main meteorological factors affecting the NDVI;and contribution rates of the climate change and human activities to the NDVI were 73.2% and 26.8%, respectively. The area with vegetation cover being mainly S.salsa that was improved, unchanged, and decreased accounted for 63.3%, 18.3%, and 18.4%, respectively, of the total area;and no meteorological factors significantly affected the NDVI of S. salsa in the region. The interaction between vegetation growth and meteorological factors may help to explain the increasing trend in vegetation cover.The improvement in wetland vegetation also led to carbon sequestration and an increase in sequestration capacity. | Yushu ZHANG Wenying YU Ruipeng JI Yijun ZHAO Rui FENG Qingyu JIA Jinwen WU | 2021 | Journal of Meteorological Research2021，35，1： | 3 |
| 11 | Cooperative effect from cation and anion of pyridine-containing anion-based ionic liquids for catalysing CO_2 transformation at ambient conditions显示文摘Pyridine-containing anion-based ionic liquids(PA-ILs) with two kinds of interaction sites to bind CO_2, e.g., [P4444][2-OP], were found to be highly efficient for catalysing the cycloaddition reactions of atmospheric CO_2 with epoxides at room temperature under metal-and halogen-free conditions, producing a series of cyclic carbonates in high yields. It was demonstrated that the cooperative interaction from two interaction sites in the anions of PA-ILs activated CO_2, while the cation activated the epoxides substrates via coordination to the central P+ unit, thus resulting in the high activity of the IL catalysts. | Guangfeng Yuan Yanfei Zhao Yunyan Wu Ruipeng Li Yu Chen Dongmei Xu Zhimin Liu | 2017 | Science China Chemistry2017，60，7： | 2 |
| 12 | Gankyrin promotes tumor growth and metastasis through activation of IL‐6/STAT3 signaling in human cholangiocarcinoma显示文摘 | Tongsen Zheng Xuehui Hong Jiabei Wang Tiemin Pei Yingjian Liang Dalong Yin Ruipeng Song Xuan Song Zhaoyang Lu Shuyi Qi Jiaren Liu Boshi Sun Changming Xie Shangha Pan Yuejin Li Xiaohe Luo Shuai Li Xiang Fang Nishant Bhatta Hongchi Jiang Lianxin Liu | 2014 | Hepatology2014，，： | 2 |
| 13 | Trophic Interaction in a Portunus rituberculatus Polyculture Ecosystem Based on Carbon and Nitrogen Stable Isotope Analysis显示文摘Trophic interaction among various biomass groups in a swimming crab Portunus trituberculatus polyculture pond was investigated using carbon and nitrogen stable isotope analysis. The polycultured animal species also included white shrimp Litopenaeus vannamei, short-necked clam Ruditapes philippinarum, and redlip mullet Liza haematochila. The mean δ^(13)C value for all the biomass groups in polyculture ecosystem ranged from -25.61‰ to -16.60‰, and the mean δ^(15)N value ranged from 6.80‰ to 13.09‰. Significant difference in the δ^(13)C value was found between particulate organic matter(POM) and sediment organic matter(SOM)(P < 0.05), indicating that these two organic matter pools have different material sources. Assuming that a ^(13)C-enrichment factor of 1.00‰ and a ^(15)N-enrichment factor of 2.70‰ existed between consumer and prey, diets of the four cultured animals were estimated using a stable isotope mixing model. The estimated model results indicated that P. trituberculatus mainly feed on Aloidis laevis; L. vannamei mainly feed on shrimp feed; while A. laevis, R. philippinarum and L. haematochelia mainly feed on POM. Shrimp feed was also an important food source of R. philippinarum and L. haematochelia. The diets of P. trituberculatus, L. vannamei, R. philippinarum, and L. haematochila showed complementary effects in this polyculture ecosystem. Our finding indicated that the polyculture of these four organisms with suitable farming density could make an effective use of most of the food sources, which can make a highly efficient polyculture ecosystem. | FENG Jie TIAN Xiangli DONG Shuanglin LI Da HE Ruipeng ZHANG Kai ZHANG Dongxu ZHANG Qingqi | 2018 | Journal of Ocean University of China2018，17，6： | 2 |
| 14 | Application of Laser Ultrasonic Technique for Non-contact Detection of Angled Surface Defects显示文摘Based on the finite element method,the angled surface defects have been investigated by using the laser generated surface acoustic wave(SAW).The feature of laser generated SAW interaction with the angled defect is analyzed in time and frequency domains.An increase in the amplitude of SAW at the edge of the defect is observed,and the spectral feature is angle dependent.With the angle decreasing from 120°to 30°,the maximum amplitude of frequency spectrum of SAW increases gradually.The corresponding experimental results verify the feasibility of numerical analyses and reach a good agreement with simulation results. | Guo Ruipeng Liu Jinghua Wang Haitao | 2018 | Transactions of Nanjing University of Aeronautics and Astronautics2018，35，5： | 2 |
| 15 | Insights into the sandwich-like ultrathin Ni-doped MoS_(2)/rGO hybrid as effective sulfur hosts with excellent adsorption and electrocatalysis effects for lithium-sulfur batteries显示文摘The design of sulfur hosts with high conductivity,large specific surface area,strong adsorption and electrocatalytic ability is crucial to advance high performance lithium-sulfur batteries.Herein,a novel ultrathin sandwich-type Ni-doped MoS_(2)/reduced graphene oxide(denote as Ni-doped MoS_(2)/rGO) hybrid is developed as a sulfur host through a simple one-step hydrothermal route.The two-dimensional layered structure Ni-doped MoS_(2)/rGO hybrid with heterostructure and heteroatom architecture defects not only plays a key role in adsorption of lithium polysulfide but also catalyzes on redox kinetics of sulfur and polysulfide species.Meanwhile,it can contribute to the large specific surface area for Li_(2) S/S_8 deposition,fast Li-ion and electron transportation,thus enhancing the electrocatalytic properties,as confirmed firstly by cyclic voltammetry(CV) results.Due to the adsorption-catalytic synergistic effect,the Ni-doped MoS_(2)/rGO cathode exhibits high specific capacity(1343.6 mA h g^(-1) at 0.2 C,921.6 mA h g^(-1) at 1 C),high coulombic efficiency and an outstanding cycle stability(with the low attenuation rate of 0.077% per cycle over 140 cycles at 0.5 C and 0.11% per cycle over 400 cycles at 1 C,respectively).This work proposes some inspiration for exploring the construction of advanced lithium-sulfur batteries through the rational design defects of atomic structure and electronic states of MoS_(2) as sulfur host. | Ran Zhang Yutao Dong Mohammed AAl-Tahan Yingying Zhang Ruipeng Wei Yuhang Ma Changchun Yang Jianmin Zhang | 2021 | Journal of Energy Chemistry2021，30，9： | 2 |
| 16 | Mechanism of hydrogen desorption during palladium brush plating 显示文摘 | Ruipeng Yang Xun Cai Qinglong Chen | 2001 | Surface & Coating Technology2001，141，： | 1 |
| 17 | Positive Periodic Solutions of Second-Order Singular Coupled Systems with Damping Terms显示文摘We establish the existence of positive periodic solutions of the second-order singular coupled systems{x′′+ p_1(t)x′+ q_1(t)x = f_1(t, y(t)) + c_1(t),y′′+ p_2(t)y′+ q_2(t)y = f_2(t, x(t)) + c_2(t),where pi, qi, ci ∈ C(R/T Z; R), i = 1, 2; f_1, f_2 ∈ C(R/T Z ×(0, ∞), R) and may be singular near the zero. The proof relies on Schauder's fixed point theorem and anti-maximum principle.Our main results generalize and improve those available in the literature. | Ruipeng CHEN Xiaoya LI | 2017 | Journal of Mathematical Research with Applications2017，37，4： | 1 |
| 18 | Comparative gene expression profiling of normal and human colorectaladenomatous tissues显示文摘 | Gongliang Du Xuehong Fang Wei Dai Ruipeng Zhang Ruiting Liu Xingbo Dang | 2014 | Oncology Letters2014，，5： | 1 |
| 19 | True and appar- ent scaling: The proximity of the Markov switching multifrac tal model to long-range dependence显示文摘 | Ruipeng LIU T D MATTEO L THOMAS | 2007 | Physica A: Statistical Mechanics and its Applications2007，383，1： | 1 |
| 20 | Hollow cubic MnS-CoS_(2)-NC@NC designed by two kinds of nitrogen-doped carbon strategy for sodium ion batteries with ultraordinary rate and cycling performance显示文摘In order to obtain an advanced anode material that exhibits excellent electrochemical performance in sodium ion batteries,a hollow nanocube MnS-CoS_(2)-NC@NC(NC=nitrogen-doped carbon)with two kinds of nitrogen-doped carbon was synthesized by simple one-step calcination.One of the two kinds of nitrogen-doped carbon comes from the organic ligands in the precursor being mixed in the sulfide after calcination,and the other comes from the calcination of the coated polydopamine(PDA)to form a carbon shell wrapped outside the sulfide.The characteristic nanostructure with two kinds of nitrogen-doped carbon can not only improve the overall conductivity of the electrode material,which is obviously beneficial to the rapid transmission of sodium ions and thus outstanding rate performance,but also can alleviate volume expansion to maintain battery cycle stability.In the half-cell,the MnS-CoS_(2)-NC@NC electrode not only provides an ultra-high specific capacity of 608.5 mA·h·g^(-1)at 0.2 A·g^(-1)for 100 cycles,but also shows an outstanding rate performance of 560.5 mA·h·g^(-1)at 5.0 A·g^(-1)for 1,100 cycles.Even in a full-cell composed with Na3V2(PO4)3 as the positive material,it can still maintain a capacity of 436.7 mA·h·g^(-1)after 900 cycles at 1.0 A·g^(-1).In order to explore its sodium storage mechanism,in-situ and ex-situ X-ray diffraction(XRD)tests were carried out to prove that CoS_(2)and MnS were reduced to produce metallic Co and metallic Mn during the discharging process,respectively,and reversibly returned during the charging process. | Ruipeng Wei Yutao Dong Yingying Zhang Xiyang Kang Xia Sheng Jianmin Zhang | 2022 | Nano Research2022，15，4： | 1 |
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