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| 1 | Genetic improvement of heat tolerance in wheat:Recent progress in understanding the underlying molecular mechanisms显示文摘As a cool season crop, wheat(Triticum aestivum L.) has an optimal daytime growing temperature of 15 ℃ during the reproductive stage. With global climate change, heat stress is becoming an increasingly severe constraint on wheat production. In this review, we summarize recent progress in understanding the molecular mechanisms of heat tolerance in wheat. We firstly describe the impact of heat tolerance on morphology and physiology and its potential effect on agronomic traits. We then review recent discoveries in determining the genetic and molecular factors affecting heat tolerance, including the effects of phytohormone signaling and epigenetic regulation. Finally, we discuss integrative strategies to improve heat tolerance by utilization of existing germplasm including modern cultivars, landraces and related species. | Zhongfu Ni Hongjian Li Yue Zhao Huiru Peng Zhaorong Hu Mingming Xin Qixin Sun | 2018 | The Crop Journal2018，6，1： | 4 |
| 2 | Environmental taxation and regional inequality in China显示文摘In order to combat environmental pollution, China enacted the Environmental Protection Tax Law in early 2018. Yet the impacts of the environmental tax on individual regions with different socioeconomic statuses, which are crucial for social justice and public acceptance, remain unclear. Based on a MultiRegional Input-Output(MRIO) table and a nationally regulated tax payment calculation method, this study analyzes the distributional impacts of an environmental tax based upon province’s consumption from both inter-provincial and rural-urban aspects. The national tax revenue based on the current levy mechanism is estimated to be only one seventh of the economic loss from premature mortality caused by ambient particulate matter(PM2.5). The taxation may slightly alleviate urban-rural inequality but may not be helpful with reducing inter-provincial inequality. We further analyze two alternative levy mechanisms. If each province imposes taxes to products it consumes(rather than produces, as in the current mechanism), with the tax rate linearly dependent on its per capita consumption expenditure, this would moderately increase the national tax revenue and significantly reduce inter-provincial inequality.To better compensate for the economic costs of air pollution and reduce regional inequality, it would be beneficial to increase the tax rate nationwide and implement a levy mechanism based on provincially differentiated levels of consumption and economic status. | Jingxu Wang Jintai Lin Kuishuang Feng Peng Liu Mingxi Du Ruijing Ni Lulu Chen Hao Kong Hongjian Weng Mengyao Liu Giovanni Baiocchi Yu Zhao Zhifu Mi Jing Cao Klaus Hubacek | 2019 | Science Bulletin2019，64，22： | 3 |
| 3 | Rock- breaking experiment with supercritical carbon dioxide jet 显示文摘 | DU Yukun WANG Ruihe NI Hongjian | 2012 | Journal of China University of Petroleum ( Edition of Natural Science)2012，36，4： | 1 |
| 4 | The evolving concept of physiological ischemia training vs. ischemia preconditioning显示文摘Ischemic heart diseases are the leading cause of death with increasing numbers of patients worldwide.Despite advances in revascularization techniques,angiogenic therapies remain highly attractive.Physiological ischemia training,which is first proposed in our laboratory,refers to reversible ischemia training of normal skeletal muscles by using a tourniquet or isometric contraction to cause physiologic ischemia for about 4 weeks for the sake of triggering molecular and cellular mechanisms to promote angiogenesis and formation of collateral vessels and protect remote ischemia areas.Physiological ischemia training therapy augments angiogenesis in the ischemic myocardium by inducing differential expression of proteins involved in energy metabolism,cell migration,protein folding,and generation.It upregulates the expressions of vascular endothelial growth factor,and induces angiogenesis,protects the myocardium when infarction occurs by increasing circulating endothelial progenitor cells and enhancing their migration,which is in accordance with physical training in heart disease rehabilitation.These findings may lead to a new approach of therapeutic angiogenesis for patients with ischemic heart diseases.On the basis of the promising results in animal studies,studies were also conducted in patients with coronary artery disease without any adverse effect in vivo,indicating that physiological ischemia training therapy is a safe,effective and non-invasive angiogenic approach for cardiovascular rehabilitation.Preconditioning is considered to be the most protective intervention against myocardial ischemia-reperfusion injury to date.Physiological ischemia training is different from preconditioning.This review summarizes the preclinical and clinical data of physiological ischemia training and its difference from preconditioning. | Jun Ni Hongjian Lu Xiao Lu Minghui Jiang Qingyun Peng Caili Ren Jie Xiang Chengyao Mei Jianan Li | 2015 | The Journal of Biomedical Research2015，29，6： | 1 |
| 5 | Rock-breakingexperiment with supercritical carbon dioxide jet显示文摘 | DU Yukun WANG Ruihe NI Hongjian | 2012 | Journal of ChinaUniversity of Petroleum (Edition of Natural Science)2012，36，4： | 1 |
| 6 | Wellbore heat transfer law of carbondioxide coiled tubing drilling显示文摘 | WANG Ruihe NI Hongjian | 2013 | Journal of China University ofPetroleum (Edition of Natural Science)2013，37，5： | 1 |
| 7 | Coupling modelfor carbon dioxide wellbore flow and heat transfer in coiled tubingdrilling显示文摘 | NI Hongjian SONG Weiqiang WANG Ruihe | 2016 | Journal of Natural Gas Science and Engineering2016，30，： | 1 |
| 8 | Design and Fluid-Dynamic Analysis of a Flushing Nozzle for Drilling Applications显示文摘The actuator is a key component of the creaming tool in drilling applications.Its jet performances determine the effective reaming efficiency.In this work,a new selective reaming tool is proposed and the RNG k-εturbulence model is used to calculate its internal and externalflowfields.In particular,special attention is paid to the design of theflushing nozzle.The results show that the jet originating from theflushing nozzle has a significant influence on rock cutting and blade cooling effects.In turn,the jet performances depend on geometric structure of the creaming actuator.In this framework,a conical-cylindrical nozzle with a diameter of 7 mm is initially considered as a basis to implement a strategy to optimize the structural parameters of the reaming actuator,and improve the related side tracking reconstruction technology. | Zhongshuai Chen Hongjian Ni Xueliang Pei Yu Gao | 2023 | Fluid Dynamics & Materials Processing2023，19，12： | 0 |
| 9 | Method of suspender line trajectory design显示文摘Based on the mechanical model of an elastic rod,a new trajectory design method was established.The advantages of the suspender line trajectory in reducing drag and torsion were compared,and the main controlling factors of drag and torque and their influence rules were analyzed.Research shows that the suspender line trajectory reduces drag and torque more effectively than the conventional trajectory in a certain parameter interval and has more controllable parameters than that of the catenary trajectory.The main factors affecting the drag reduction and torque reduction of the suspender line trajectory include the friction coefficient,vertical distance,horizontal distance,and deviation angle at the initial point in the suspended section.The larger the friction coefficient and deviation angle,the less the drag reduction and torque reduction.The suspender line trajectory has the best drag reduction effect when the horizontal and vertical distances are more than 3000 m and the ratio is close to 1.5.The drag in sliding drilling can be reduced up to 60%,and the torque in rotary drilling can be reduced by a maximum of 40%.Therefore,the trajectory design of the suspender line has unique application prospects in deep extended-reach wells. | YU Fan HUANG Genlu HAN Zhiyong NI Hongjian LI Jing LI Wei | 2021 | Petroleum Exploration and Development2021，48，5： | 0 |
| 10 | Simulation of Supercritical Carbon Dioxide Fracturing in Shale Gas Reservoir显示文摘In order to fracture shale gas reservoir with carbon dioxide as the working fluid,laboratory experiments were firstly conducted to measure the influence of carbon dioxide immersion on shale rock's properties,and then the coupling mechanism between stress and seepage during hydraulic fracturing was simulated based on cohesive zone model.The fracturing ability of carbon dioxide and water was also compared under the same working conditions,and finally sensitivity analysis(including elastic modulus of shale,filtration coefficient,pump rate and viscosity of carbon dioxide)were conducted based on field application.The results show that,the elastic modulus of shale increased by 32.2%,the Poisson's ratio decreased by 40.3%and the compressive strength decreases by 22.9%after geothermal reaction with carbon dioxide under 30 MPa and 335.15 K for 2 hours.Compared with water fracturing,carbon dioxide fracturing induces longer fracture(increased by 25.3%)and narrower fracture(decreased to 40.8%).The fracture tends to get longer and narrower with increasing elastic modulus of shale.As filtration coefficient increases,the maximum width of fracture decreases significantly,whereas the length changes little.Both the length and maximum width of fracture increase with increasing pump rate,however the changing rate of length tends to decrease.The influence of viscosity of carbon dioxide on both fracture width and length is negligible,which validates the stable feasibility of carbon dioxide fracturing in different formation conditions. | SONG Weiqiang NI Hongjian TANG Peng ZHANG Shichuan GAO Jichao ZHANGJunming SHEN Baotang | 2021 | Journal of Thermal Science2021，30，4： | 0 |
| 11 | Heat-fluid-solid coupling mechanism of supercritical carbon dioxide jet in rock-breaking显示文摘Aiming at the synergistic rock-breaking mechanism of supercritical carbon dioxide(SC-CO_(2))jet pressure and tem-perature difference,a heat-fluid-solid calculation model of rock-breaking stress was established and verified to be effective,and the variations of jet flow field and rock stress with jet standoff distance of SC-CO_(2),water and nitrogen were studied.With the increase of jet standoff distance,the jet pressure of SC-CO_(2) decreases and the jet temperature difference increases.The SC-CO_(2) jet is higher in pressure than the nitrogen jet and differs little from the water jet.Temperature difference of SC-CO_(2) jet is 5 times that of water jet and more than 2.5 ti mes that of nitrogen jet when the jet standoff distance is larger than 10.The tem-perature stress is the main reason why SC-CO_(2) jet is superior to water and nitrogen jets in rock-breaking.The rock under the SC-CO_(2) jet has greater rock stress,effective rock-breaking jet standoff distance and rock-breaking area.The jet pressure plays a major role in rock-breaking when the jet standoff distance is small,while the jet temperature difference plays a major role in rock-breaking when the jet standoff distance is large.The SC-CO_(2) jet is an efficient volume rock-breaking method,which results in tensile and shear failure on the rock surface under short time jet and large area tensile failure inside the rock simultaneously under long time jet. | LI Mukun WANG Gang CHENG Weimin PU Shijie NI Hongjian SHI Xian | 2021 | Petroleum Exploration and Development2021，48，6： | 0 |
| 12 | An Improved Model to Characterize Drill-String Vibrations in Rotary Drilling Applications显示文摘A specific model is elaborated for stick-slip and bit-bounce vibrations,which are dangerous dynamic phenomena typically encountered in the context of rotary drilling applications.Such a model takes into account two coupled degrees of freedom of drill-string vibrations.Moreover,it assumes a state-dependent time delay and a viscous damping for both the axial and torsional vibrations and relies on a sawtooth function to account for the cutting force fluctuation.In the frame of this theoretical approach,the influence of rock brittleness on the stability of the drill string is calculated via direct integration of the model equations.The results show that the rock brittleness has a great influence on the rotational speed and bit depth. | Yong Wang Hongjian Ni Ruihe Wang Shubin Liu | 2022 | Fluid Dynamics & Materials Processing2022，18，5： | 0 |
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