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| 1 | Characterizing the antibiotic resistance genes in a river catchment: Influence of anthropogenic activities显示文摘Previous studies on environmental antibiotics resistance genes(ARGs) have focused on the pollution sources such as wastewater treatment plants, aquaculture and livestock farms,etc. Few of them had addressed this issue in a regional scale such as river catchment. Hence,the occurrence and abundances of 23 ARGs were investigated in surface water samples collected from 38 sites which located from the river source to estuary of the Beijiang River.Among them, 11 ARGs were frequently detected in this region and 5 ARGs(sul I, sul II, tet B,tet C, and tet W) were selected for their distribution pattern analysis. The abundances of the selected ARGs were higher in the upstream(8.70 × 10~6 copies/ng DNA) and downstream areas(3.17 × 10~6 copies/ng DNA) than those in the midstream areas(1.23 × 10~6 copies/ng DNA), which was positively correlated to the population density and number of pollution sources. Pollution sources of ARGs along the Beijiang River not only had a great impact on the abundances and diversity, but also on the distribution of specific ARGs in the water samples. Both sul I and sul II were likely originated from aquaculture farms and animal farms,tet W gene was possibly associated with the mining/metal melting industry and the electric waste disposal and tet C gene was commonly found in the area with multiple pollution sources.However, the abundance of tet B was not particularly related to anthropogenic impacts. These findings highlight the influence of pollution sources and density of population on the distribution and dissemination of ARGs at a regional scale. | Haoyu Jiang Renjun Zhou Ying Yang Baowei Chen Zhineng Cheng Mengdi Zhang Jun Li Gan Zhang Shichun Zou | 2018 | Journal of Environmental Sciences2018，30，7： | 7 |
| 2 | Strength and Stability Analysis of Deep Sea Drilling Risers显示文摘In order to analyze the influence of vortex-induced vibration on the strength and stability of marine drilling risers, a simplified analytical model was established and a method for calculating vortex-induced dynamic response was developed. A case study indicated that at primary resonance, first-order dynamic displacement response is greater than higher-order mode responses, but the influence of dynamic moment and shearing force of higher-order modes cannot be ignored. The natural frequency of risers decreased sharply with increasing length of the riser, but increased with increasing top tension. Various factors should be considered to avoid vortex-induced vibration in practical application, and the influence of vortex-induced vibration could be estimated by calculating the fatigue lifetime of riser. | Yang Jin Liu Caihong Liu Hanbin Xie Renjun Cao Shijing | 2007 | Petroleum Science2007，4，2： | 5 |
| 3 | Gene Cloning and Molecular Characterization of a β-Glucosidase from Thermotoga Naphthophila RUK-10:an Effective Tool for Synthesis of Galacto-oligosaccharide and Alkyl Galactopyranosides显示文摘 | KONG Fansi YANG Jingwen ZHEN Zhen LIANG Tingting ZHU Dongliang GAO Renjun XIE Guiqiu | 2015 | Chemical Research in Chinese Universities2015，31，5： | 3 |
| 4 | Oscillating Cellulase Adsorption and Enhanced Lignocellulose Hydrolysis upon Ultrasound Treatment显示文摘We investigated the effects of ultrasound treatment on cellulase adsorption and lignocellulose hydrolysis.The activity of cellulase remained constant upon lowpower ultrasound treatment(<120 W) and decreased using high-power ultrasound(>280 W).Oscillating cellulase adsorption occurred upon ultrasound treatment with any intensity.The maxima for desorption and adsorption were41.9 and 83.1%,respectively,during 1 h of 90 W ultrasound treatment at 50 °C.A comparison between the shorttime with long-time ultrasound experiments indicated that ultrasound treatment tended to desorb cellulase from substrate.However,ultrasound treatment also led to further surface erosion of biomass,which increased cellulase accessibility.These joint actions of ultrasound treatment induced the oscillating adsorption of cellulase.The increase in cellulase accessibility caused by ultrasound treatment led to a significant enhancement in lignocellulose hydrolysis. | Rongxin Su Renjun Yang Yang Jifeng Ruoyu Du Renliang Huang Wei Qi Zhimin He | 2017 | Transactions of Tianjin University2017，23，1： | 3 |
| 5 | Metal-organic Chemical Vapor Deposition of GaSb/GaAs Quantum Dots: the Dependence of the Morphology on Growth Temperature and Vapour V/Ⅲ Ratio显示文摘 | YANG Haoyu LIU Renjun LU You WANG Liankai LI Tiantian LI Guoxing ZHANG Yuantao ZHANG Baolin | 2014 | Chemical Research in Chinese Universities2014，30，1： | 2 |
| 6 | Optimal Decay Estimates on the Linearized Boltzmann Equation with Time Dependent Force and their Applications显示文摘 | Renjun Duan Seiji Ukai Tong Yang Huijiang Zhao | 2008 | Communications in Mathematical Physics2008，，1： | 1 |
| 7 | Assembly of alternating polycation and DNA multilayer films by electrostatic layer-by-layer adsorption 显示文摘 | Pei Renjun Cui Xiaoqiang Yang Xirong | 2001 | Biomacromolecules2001，2，2： | 1 |
| 8 | Reactive power optimization and algorithm considering wind power generation显示文摘 | Hu Min Zhou Renjun Yang Hongming | 2009 | Journal of Changsha University of Science and Technology2009，27，12： | 1 |
| 9 | Analysis on the capture, behavior monitoring and death of the baiji ( Lipotes vexillifer) in the Shishou Semi-natural Reserve at Yangtze River China 显示文摘 | Liu Renjun Yang Jian Wang Ding Zhao Qingzhong Wei Zhuo Wang Xiaoqiang | 1997 | International Marine Biological Research lnstitute Report1997，8，： | 1 |
| 10 | The Vlasov–Poisson–Boltzmann system in the whole space: The hard potential case显示文摘 | Renjun Duan Tong Yang Huijiang Zhao | 2012 | Journal of Differential Equations2012，，12： | 1 |
| 11 | Multimodality evoked potentials in patients with delayed encephalopathy after acute carbon monoxide poisoning显示文摘Objective: To evaluate the diagnostic and prognostic values in patients with delayed encephalopathy after acute carbon monoxide poisoning. Methods: The tibial nerve somatosensory evoked potentials(SEPs), vision evoked potentials (VEPs), and brain stem audition evoked potentials(BAEPs) were performed in 32 healthy adults and 43 patients with delayed encephalopathy after acute carbon monoxide poisoning. Results: This paper indicated abnormalities of tibial nerve SEPs in 31 patients(31/43, 72.1%), VEPs in 17 patients(17/28, 60.7%), and BAEPs in 14 patients (14/43, 32.6%). These results showed that the greatest diagnostic value was SEPs, followed by VEPs and, BAEPs with the lowest sensitivity. Conclusion: Multimodality evoked potentials (EPs) can be used for evaluating the diagnostic and prognostic values in cases of delayed encephalopathy after acute carbon monoxide poisoning. | Xiahong Wang Bo Xiao Renjun Gu Lan Xiao Yi Yang Yinhui Hao Nini Wang Junlin Mu Jinggang Yin | 2006 | Journal of Nanjing Medical University2006，20，5： | 0 |
| 12 | Determination of the Cement Sheath Interface and the Causes of Failure in the Completion Stage of Gas Wells显示文摘The bonding quality of the cement sheath interface decreases during well completion because of the change in the casing pressure.To explore the root cause of such phenomena,experiments on the mechanical properties and interface bonding strength of a cement sheath have been carried out taking the LS25-1 high-temperature and high-pressure(HTHP)gas field as an example.Moreover,a constitutive model of the cement sheath has been defined and verified both by means of a full-scale HTHP cement sheath sealing integrity evaluation experiment and three-dimensional finite element simulations.The results show that the low initial cementing surface strength is the root cause of cement sheath interface bonding failure.When the pressure in the casing exceeds a certain limit,the stress caused by the change in the internal pressure in the casing is transmitted to the cement sheath,resulting in the degradation of the interface stiffness of the cement sheath.However,with an increase in the casing wall thickness,the stress transmission capacity decreases.Therefore,it is concluded that improving the interfacial cementing strength,appropriately increasing the casing wall thickness and increasing the initial stress of the cement sheath are the keys to ensuring the sealing integrity of the cement sheath in high-temperature and high-pressure gas wells. | Xuesong Xing Renjun Xie Yi Wu Zhiqiang Wu Huanqiang Yang | 2022 | Fluid Dynamics & Materials Processing2022，18，6： | 0 |
| 13 | Risk-based Two-stage Optimal Scheduling of Energy Storage System with Second-life Battery Units显示文摘With the growing adoption of Electrical Vehicles(EVs),it is expected that a large number of on-board Li-ion batteries will be retired from EVs in the near future.Retired batteries will typically retain 80%of their initial capacities and can be recycled as second life batteries(SLBs).Although the capital costs of SLBs are much cheaper,their operational reliability is an important concern since used batteries may suffer from a higher failure rate.This paper aggregates brand new batteries and SLBs together to improve power system’s operating performance with renewable energy resources.In the context of a day-ahead and intra-day dispatch framework,a two-stage coordinated optimal scheduling method is proposed.Specifically,the energy cost of brand-new batteries and SLBs is calculated based on detailed battery degradation model,and the reliability of batteries is modeled based on the Weibull distribution.Moreover,Conditional value at risk(CVaR)criterion is applied to evaluate the risk induced by intermittent renewable power output,load demand variation and SLBs failure probability.Simulation tests demonstrate the effectiveness of the proposed method. | Yongxi Zhang Jiahua Zhu Yan Xu Renjun Zhou Zhao Yang Dong | 2023 | CSEE Journal of Power and Energy Systems2023，9，2： | 0 |
| 14 | Gene Clone and Characterization of a Novel Thermostable β-Galactosidase with Transglycosylation Activity from Thermotoga naphthophila RUK-10显示文摘 | YANG Jingwen DI Xiangjun WANG Man GAO Renjun | 2015 | Chemical Research in Chinese Universities2015，31，4： | 0 |
| 15 | Analysis of the Microstructure of a Failed Cement Sheath Subjected to Complex Temperature and Pressure Conditions显示文摘One of the main obstacles hindering the exploitation of high-temperature and high-pressure oil and gas is the sealing integrity of the cement sheath.Analyzing the microstructure of the cement sheath is therefore an important task.In this study,the microstructure of the cement sheath is determined using a CT scanner under different temperature and pressure conditions.The results suggest that the major cause of micro-cracks in the cement is the increase in the casing pressure.When the micro-cracks accumulate to a certain extent,the overall structure of the cement sheath is weakened,resulting in gas channeling,which poses a direct threat to the safe production of oil and gas.A change in the casing temperature has a limited effect on the microstructure of the cement sheath. | Zhiqiang Wu Yi Wu Renjun Xie Jin Yang Shujie Liu Qiao Deng | 2023 | Fluid Dynamics & Materials Processing2023，19，2： | 0 |
| 16 | Developmental toxicity assessment of neonicotinoids and organophosphate esters with a human embryonic stem cell-and metabolism-based fast-screening model显示文摘In recent years,neonicotinoids(NEOs)and organophosphate esters(OPEs)have been widely used as substitutes for traditional pesticides and brominated fame-retardants,respectively.Previous studies have shown that those compounds can be frequently detected in environmental and human samples,are able to penetrate the placental barrier,and are toxic to animals.Thus,it is reasonable to speculate that NEOs and OPEs may have potential adverse effects in humans,especially during development.We employed a human embryonic stem cell differentiation-and liver S9 fraction metabolism-based fast screening model to assess the potential embryonic toxicity of those two types of chemicals.We show that four NEO and five OPE prototypes targeted mostly ectoderm specification,as neural ectoderm and neural crest genes were down-regulated,and surface ectoderm and placode markers up-regulated.Human liver S9 fraction's treatment could generally reduce the effects of the chemicals,except in a few specific instances,indicating the liver may detoxify NEOs and OPEs.Our findings suggest that NEOs and OPEs interfere with human early embryonic development. | Shuxian Zhang Miaomiao Zhao Shichang Li Renjun Yang Nuoya Yin Francesco Faiola | 2024 | Journal of Environmental Sciences2024，，3： | 0 |
| 17 | High-emitter identification for heavy-duty vehicles by temporal optimization LSTM and an adaptive dynamic threshold显示文摘Heavy-duty diesel vehicles are important sources of urban nitrogen oxides(NOx)in actual applications for environmental compliance,emitting more than 80%of NOx and more than 90%of particulate matter(PM)in total vehicle emissions.The detection and control of heavy-duty diesel emissions are critical for protecting public health.Currently,vehicles on the road must be regularly tested,every six months or once a year,to filter out high-emission mobile sources at vehicle inspection stations.However,it is difficult to effectively screen high-emission vehicles in time with a long interval between annual inspections,and the fixed threshold cannot adapt to the dynamic changes of vehicle driving conditions.An on-board diagnostic device(OBD)is installed inside the vehicle and can record the vehicle’s emission data in real time.In this paper,we propose a temporal optimization long short-term memory(LSTM)and adaptive dynamic threshold approach to identify heavy-duty high-emitters by using OBD data,which can continuously track and record the emission status in real time.First,a temporal optimization LSTM emission prediction model is established to solve the attention bias discrepancy problem on time steps that is caused by the large number of OBD data streams in practice.Then,the concentration prediction error sequence is detected and distinguished from the anomalous emission contexts using flexible criteria,calculated by an adaptive dynamic threshold with changing driving conditions.Finally,a similarity metric strategy for the time series is introduced to correct some pseudo anomalous results.Experiments on three real OBD time-series emission datasets demonstrate that our method can achieve high accuracy anomalous emission identification. | Zhenyi XU Renjun WANG Yang CAO Yu KANG | 2023 | Frontiers of Information Technology & Electronic Engineering2023，24，11： | 0 |
| 18 | Feasibility Analysis and Policy Recommendations for Production of Hybrid Rice Seed in Foreign Countries显示文摘In the economic new normal,production of hybrid rice seed in foreign countries is the necessity for reducing farmland area occupied by seed production,for ensuring national grain security,realizing cost reducing and quality improving of hybrid rice seed,strengthening competitive power at international market,guiding seed industry of China to go out,building transnational seed groups with core competitive power,establishing close relationship with developing countries,promoting the construction of One Belt One Road strategy,serving overall situation of diplomacy,and setting up excellent international image. It is feasible to produce hybrid seed in foreign countries considering( i) high overall national strength of China,( ii) rapid and healthy growth of China's seed industry and increasingly mature hybrid rice seed production technologies,( iii) excellent climatic conditions of foreign host countries of seed production,and( iv) low land and labor price of foreign host countries of seed production. However,there are social and policy risks,technology and trade barrier risks,market,production,and other risks for production of hybrid rice seed in foreign countries. In view of these,it came up with recommendations,including allowing delivering parent seeds of hybrid rice to foreign countries,allowing delivering hybrid rice seed to China,solving the problem of ' opening in protection,and protection in opening',and formulating a package of support policies. | Hongbo DUAN Qianyu YANG Xiangping LIU Zhixin LI Renjun WANG | 2016 | Asian Agricultural Research2016，8，10： | 0 |
| 19 | Heat Transfer Problem for the Boltzmann Equation in a Channel with Diffusive Boundary Condition显示文摘In this paper,the authors study the 1 D steady Boltzmann flow in a channel.The walls of the channel are assumed to have vanishing velocity and given temperaturesθ0andθ1.This problem was studied by Esposito-Lebowitz-Marra(1994,1995)where they showed that the solution tends to a local Maxwellian with parameters satisfying the compressible Navier-Stokes equation with no-slip boundary condition.However,a lot of numerical experiments reveal that the fluid layer does not entirely stick to the boundary.In the regime where the Knudsen number is reasonably small,the slip phenomenon is significant near the boundary.Thus,they revisit this problem by taking into account the slip boundary conditions.Following the lines of[Coron,F.,Derivation of slip boundary conditions for the Navier-Stokes system from the Boltzmann equation,J.Stat.Phys.,54(3-4),1989,829-857],the authors will first give a formal asymptotic analysis to see that the flow governed by the Boltzmann equation is accurately approximated by a superposition of a steady CNS equation with a temperature jump condition and two Knudsen layers located at end points.Then they will establish a uniform L∞estimate on the remainder and derive the slip boundary condition for compressible Navier-Stokes equations rigorously. | Renjun DUAN Shuangqian LIU Tong YANG Zhu ZHANG | 2022 | Chinese Annals of Mathematics,Series B2022，43，6： | 0 |
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