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| 1 | Genesis and Implications of the Composition and Sedimentary Structure of Fine-Grained Carbonate Rocks in the Shulu Sag显示文摘Fine-grained carbonate rocks, which extensively occur in the Eocene strata in the Shulu sag, Bohai Bay Basin, North China, represent an unconventional, fine-grained carbonate reservoir. However, previous studies have ignored the complexity of the lithofacies components and their formation mechanisms. Fine-grained carbonate rocks are typical reservoirs in which hydrocarbons form and gather. A better understanding of the nature of these rocks is extremely important for evaluating the quality of unconventional, fine-grained carbonate reservoirs. Various lithofacies components were discriminated in this study with a combination of petrographic observations and carbon isotope analyses. These finegrained carbonate rocks comprise terrigenous, biogenic and diagenetic materials. Terrigenous input and biologically induced precipitation are the main sources of the materials in the lake. Five lithofacies were identified based on the observations of sedimentary features(core and thin section) and mineralogical data:(1) varve-like laminated calcilutite,(2) graded laminated calcilutite,(3) interlaminated calcisiltitecalcilutite,(4) massive calcilutite, and(5) massive calcisiltite-calcarenite. Their origins were recorded by various lithofacies components, which are controlled by the interactions of physical, chemical and biological processes. This study indicated that the lithology of the bedrocks was the key factor controlling carbonate accumulation. The tectonics and climate can influence the weathering and types of lithofacies. Primary productivity controlled the precipitation of the endogenic calcite. These factors jointly determined the abundant fine-grained carbonate rocks that have accumulated in the Shulu sag. | Xiangxin Kong Zaixing Jiang Chao Han Lijing Zheng Yiming Zhang Ruifeng Zhang Jianzhang Tian | 2017 | Journal of Earth Science2017，28，6： | 6 |
| 2 | From Green Super Rice to green agriculture:Reaping the promise of functional genomics research显示文摘Producing sufficient food with finite resources to feed the growing global population while having a smaller impact on the environment has always been a great challenge.Here,we review the concept and practices of Green Super Rice(GSR)that have led to a paradigm shift in goals for crop genetic improvement and models of food production for promoting sustainable agriculture.The momentous achievements and global deliveries of GSR have been fueled by the integration of abundant genetic resources,functional gene discoveries,and innovative breeding techniques with precise gene and whole-genome selection and efficient agronomic management to promote resource-saving,environmentally friendly crop production systems.We also provide perspectives on new horizons in genomic breeding technologies geared toward delivering green and nutritious crop varieties to further enhance the development of green agricul-ture and better nourish the world population. | Sibin Yu Jauhar Ali Shaochuan Zhou Guangjun Ren Huaan Xie Jianlong Xu Xinqiao Yu Fasong Zhou Shaobing Peng Liangyong Ma Dingyang Yuan Zefu Li Dazhou Chen Ruifeng Zheng Zhigang Zhao Chengcai Chu Aiqing You Yu Wei Susong Zhu Qiongyao Gu Guangcun He Shigui Li Guifu Liu Changhua Liu Chaopu Zhang Jinghua Xiao Lijun Luo Zhikang Li Qifa Zhang | 2022 | Molecular Plant2022，15，1： | 6 |
| 3 | Mn–Co–Ni–O thin films prepared by sputtering with alloy target显示文摘The thin film of heat-sensitive materials has been widely concerned with the current trend of miniaturization and integration of sensors.In this work,Mn1.56 Co0.96 Ni0.48 O4(MCNO)thin films were prepared on Si O2/Si substrates by sputtering with Mn–Co–Ni alloy target and then annealing in air at different temperatures(650–900℃).The X-ray diffraction(XRD)and field emission scanning electron microscopy(FE-SEM)analysis indicated that the main crystalline phase of MCNO thin films was spinel crystal structure;the surface of the thin films was very dense and uniform.The electrical properties of the thin films were studied in the temperature range of–5–50℃.The MCNO thin film with a low room temperature resistance R25 of 71.1 kΩand a high thermosensitive constant B value of 3305 K was obtained at 750℃.X-ray photoelectron spectroscopy(XPS)analysis showed that the concentration of Mn3+and Mn4+cations in MCNO thin films is the highest when annealing temperature is 750℃.The complex impedance analysis revealed internal conduction mechanism of the MCNO thin film and the resistance of the thin film was dominated by grain boundary resistance. | Ruifeng LI Qiuyun FU Xiaohua ZOU Zhiping ZHENG Wei LUO Liang YAN | 2020 | Journal of Advanced Ceramics2020，9，1： | 3 |
| 4 | Faceted Kurdjumov-Sachs interface-induced slip continuity in the eutectic high-entropy alloy,AlCoCrFeNi_(2.1)显示文摘Recently,the eutectic high-entropy alloy(EHEA),AlCoCrFeNi_(2.1),can reach a good balance of strength and ductility.The dual-phase alloy exhibits a eutectic lamellar microstructure with large numbers of interfaces.However,the role of the interfaces in plastic deformation have not been revealed deeply.In the present work,the orientation relationship(OR)of the interfaces has been clarified as the Kurdjumov-Sachs(KS)interfaces presenting〈111〉_(B2) 〈110〉_(FCC)and {110} _(B2){111}_(FCC) independent of their morphologies.There exist three kinds of interfaces in the EHEA,namely,The dominating interface and the secondary interface are both non-slip planes and atomistic-scale faceted,facilitating the nucleation and slip transmission of the dislocations.The formation mechanism of the preferred interfaces is revealed using the atomistic geometrical analysis according to the criteria of the low interfacial energy based on the coincidence-site lattice(CSL)theory.In particular,the ductility of the dual-phase alloy originates from the KS interface-induced slip continuity across interfaces,which provides a high slip-transfer geometric factor.Moreover,the strengthening effect can be attributed to the interface resistance for the dislocation transmission due to the mismatches of the moduli and lattice parameters at the interfaces. | Ting Xiong Wenfan Yang Shijian Zheng Zhaorui Liu Yiping Lu Ruifeng Zhang Yangtao Zhou Xiaohong Shao Bo Zhang Jun Wang Fuxing Yin Peter K.Liaw Xiuliang Ma | 2021 | Journal of Materials Science & Technology2021，，6： | 2 |
| 5 | Large eddy simulation of high-Reynolds-number atmospheric boundary layer flow with improved near-wall correction显示文摘It is highly attractive to develop an efficient and flexible large eddy simulation(LES)technique for high-Reynolds-number atmospheric boundary layer(ABL)simulation using the low-order numerical scheme on a relatively coarse grid,that could reproduce the logarithmic profile of the mean velocity and some key features of large-scale coherent structures in the outer layer.In this study,an improved near-wall correction scheme for the vertical gradient of the resolved streamwise velocity in the strain-rate tensor is proposed to calculate the eddy viscosity coefficient in the subgrid-scale(SGS)model.The LES code is realized with a second-order finite-difference scheme,the scale-dependent dynamic SGS stress model,the equilibrium wall stress model,and the proposed correction scheme.Very-high-Reynolds-number ABL flow simulation under the neutral stratification condition is conducted to assess the performance of the method in predicting the mean and fluctuating characteristics of the rough-wall turbulence.It is found that the logarithmic profile of the mean streamwise velocity and some key features of large-scale coherent structures can be reasonably predicted by adopting the proposed correction method and the low-order numerical scheme. | Shengjun FENG Xiaojing ZHENG Ruifeng HU Ping WANG | 2020 | Applied Mathematics and Mechanics(English Edition)2020，41，1： | 1 |
| 6 | Promotional effect of Mn doping on Ru/layered MCM-49 catalysts for the conversion of Levulinic acid to γ-Valerolactone显示文摘Selective hydrogenation of Levulinic acid(LA)toγ-Valerolactone(GVL)is an important reaction to produce high value-added chemicals and fuels but remains a big challenge.Herein we reported a Ru/zeolite catalyst with Mn promotion,which exhibited excellent catalytic performance(yield:98%)towards LA to GVL.The intrinsic activity(TOF)also increased obviously with the Mn addition.The particle size of Ru gradually decreased with the increase of Mn loading and a strong interaction between Ru and support was observed for the Ru-Mn/MCM-49 catalyst.The addition of Mn not only offered a good dispersion of Ru species on MCM-49,but also increased the L/B ratio of the catalyst,thereby contributing to the high GVL selectivity.High dispersed Ru sites were the intrinsic active sites of the catalyst verified by the in-situ experimental studies.The dissociation of the reactants was significantly enhanced,resulting in higher catalytic activity. | Wenlin Li Feng Li Xin Ning Kaixi Deng Junwen Chen Jiajun Zheng Ruifeng Li | 2022 | Carbon Resources Conversion2022，5，3： | 0 |
| 7 | Pd-Catalyzed Synthesis of a-Awl Vinylphosphonates via Suzuki Arylation of a-Phosphonovinyl Nonaflates显示文摘 | Meijuan Yuan Yewen Fang Li Zhang Xiaoping Jin Minjia Tao Qilin Ye Ruifeng Li Jinjian Li Hui Zheng Juejun Gu | 2015 | Chinese Journal of Chemistry2015，33，10： | 0 |
| 8 | Facile Synthesis of Cu/Al2O3 with High Copper Dispersion for Direct Synthesis of Dimethyl Ether from Syngas显示文摘The Cu/Al_2O_3 catalysts were prepared by the solution combustion synthesis method using aluminum nitrate and copper nitrate as oxidants and citric acid as fuel. The Cu/Al_2O_3 catalysts were characterized by XRD, N_2 adsorptiondesorption, SEM-EDS, and H_2-TPR techniques. The test results indicated that this catalyst contained mesoporostity and highly dispersed copper. The Cu/Al_2O_3 catalysts were utilized as bifunctional catalysts in the syngas-to-dimethyl ether(STD) process. The CO conversion and DME selectivity were 70.9% and 58.8%, respectively. Moreover, the CO conversion kept increasing from 260 ℃ to 320 ℃ thanks to the high copper dispersion, which could reduce copper sintering at high reaction temperatures. | Wang Yan Chen Yuexian Fan Binbin Zheng Jiajun Li Ruifeng | 2017 | China Petroleum Processing & Petrochemical Technology2017，19，2： | 0 |
| 9 | Survey of Porcine Viral Diarrhea in Beijing Using Umbilical Cord Blood显示文摘[Objective] The study aimed to understand the status of piglet diarrhea virus in large-scale farms in surrounding areas of Beijing. [Method]By collecting 570 umbilical cord blood samples of diseased pigs,nucleic acids of porcine reproductive and respiratory syndrome virus( PRRSV),classical swine fever virus( CSFV),porcine pseudorabies virus( PRV),porcine circovirus( PCV),porcine epidemic diarrhea virus( PEDV),transmissible gastroenteritis virus( TGEV),and porcine rotavirus( RV) were detected by PCR or RT-PCR assay. [Result]The detection rates of PRRSV,PCV-2,PEDV,PPV,TGEV,PRV,RV and CSFV were 38. 7%,29. 6%,21. 8%,13. 03%,5. 6%,4. 2%,3. 8% and 1. 7%,respectively. [Conclusion] The major pathogens were PRRSV,PCV-2,PEDV and PPV,and mixed infection was serious. | Liu Yanhua Zheng Ruifeng Jin Yinji Zhang Xicheng Liu Xin Guo Feng Yue Shuang Wang Yutian | 2017 | Animal Husbandry and Feed Science2017，9，3： | 0 |
| 10 | Phytochemical and pharmacological progress on Syringa oblata,a traditional Mongolian medicine显示文摘Syringa oblata is a traditional Mongolian medicine mainly distributed in the Helan Mountains(the boundaries of Inner Mongolia and Ningxia,China)and the north of Yan Mountains(Aohan Qi,Inner Mongolia,China).It is clinically used to treat diseases caused by Heyi,such as heartache and heat pathogen in the heart.Phytochemical studies on S.oblata revealed the presence of iridoids,lignans,triterpenes,phenylpropanoids,phenylethanoids,and volatile components.Pharmacological investigations revealed a broad spectrum of bioactivities,such as antimicrobial,antioxidant,antiproliferative,and hepatoprotective effects.This article summarized the chemical components and pharmacological activities of S.oblata,providing a scientific rationale for its bioactive constituents,quality control,and utilization as an important medicine. | Badalahu Tai Laxinamujila Bai Ruifeng Ji Muyao Yu NAla Luqi Huang Han Zheng | 2022 | Chinese Herbal Medicines2022，14，3： | 0 |
| 11 | 6-8 LLRF Control System for ADS Injector II显示文摘The ADS Injector II is a linear superconducting accelerator, which is made up of the four vane type RFQ, MEBTand superconducting cavities. The amplitude and phase stability of all RF resonant cavities need to be controlledprecisely by the low level radio frequency (LLRF) control system. Fig. 1 is the block diagram of the LLRF controlsystem, which is composed of the RF synchronous signal distributor, LLRF system and solide state RF high poweramplifier. | Gao Zheng Zhu Zhenglong Wang Xianwu Zhang Ruifeng He Yuan Chang Wei Chen Qi | 2014 | IMP & HIRFL Annual Report2014，，1： | 0 |
| 12 | BP-LMS-based BDS-3 power system positioning method显示文摘The BeiDou-3 navigation satellite system(BDS-3)provides a full-domain high-precision positioning service for the power system to ensure safe and stable operation.However,BDS-3 power system positioning faces certain challenges,such as complex electromagnetic interference and incomplete error elimination.Herein,a back propagation neural network-improved least mean square(BP-LMS)adaptive filtering method is proposed for the BDS-3 full-domain and high-precision power system positioning,which utilizes the loss function to update the weight of the BP hidden layer,computes the pseudo compensation range,and eliminates the impact of electromagnetic interference to enhance the accuracy of power system positioning.Simulation results confirm the superior performance of BP-LMS in positioning accuracy and error elimination.Compared with LMS and normalized least mean square(NLMS),the filtering error of the proposed BP-LMS adaptive filtering method is decreased by 57.14%and 51.38%,respectively. | Ruifeng Zhao Jiangang Lu Wenxin Guo Wenjie Zheng Shiming Li | 2022 | Global Energy Interconnection2022，5，6： | 0 |
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