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Experimental investigations on separation control and flow structure around a circular cylinder with synthetic jet

Science China(Technological Sciences) 2007年第5期50卷 550-559页

作者： wang JinJun FENG lihao XU ChaoJun Fluid Mechanics Institute Beijing University of Aeronautics and Astronautics Beijing 100083 China Fluid Mechanics Institute Beijing University of Aeronautics and Astronautics Beijing 100083 China Fluid Mechanics Institute Beijing University of Aeronautics and Astronautics Beijing 100083 China

Circular cylinder separation control and flow structure influenced by the synthetic jet have been experimentally investigated in a water channel. The synthetic jet is- sues from a slot and ejects toward upstream from the front stagnation point of the cylinder. It has been found that, similar to the traditional synthetic jet which is po- sitioned near the separation point or inside the separation region, the present synthetic jet arrangement constitutes an efficient way to control flow separation of the circular cylinder, but with a different control mechanism. The present synthetic jet leads to an upstream displacement of the front stagnation point and the forma- tion of a vortex pair near both sides of the exit orifice. When ReU based on the synthetic jet average exit orifice velocity is about lower than 43, a closed envelope forms in front of the windward side of the cylinder during the blowing cycle of syn- thetic jet, which acts as an apparent modification for the cylinder configuration. When ReU is high enough, an open envelope forms upstream of the cylinder, and the flow around the cylinder becomes much energetic. Thus, regardless of ReU, the present synthetic jet can improve separation for flow around a circular cylinder. With regard to the leeward side, as ReU increases, the flow separation region be- hind the cylinder gradually disappears. The flow over cylinder may be fully attached when the open envelope forms upstream of the cylinder and ReU is greater than 344. Then, the flow past the cylinder will converge near the back stagnation point of the cylinder, where a new vortex pair shedding periodically is generated due to the high shear layer.

关键词： flow control, synthetic jet, flow around a cylinder, vortex structure

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Relationship between wall shear stresses and streamwise vortices in turbulent flows over wavy boundaries

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Applied Mathematics and Mechanics(English Edition) 2019年第3期40卷 381-396页

作者： lihao wang Weixi HUANG Chunxiao XU Lian SHEN Zhaoshun ZHANG Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua University Department of Mechanical Engineering and Saint Anthony Falls Laboratory University of Minnesota

The relationship between wall shear stresses and near-wall streamwise vortices is investigated via a direct numerical simulation(DNS) of turbulent flows over a wavy boundary with traveling-wave motion. The results indicate that the wall shear stresses are still closely related to the near-wall streamwise vortices in the presence of a wave. The wave age and wave phase significantly affect the distribution of a two-point correlation coefficient between the wall shear stresses and streamwise vorticity. For the slow wave case of c/Um = 0.14, the correlation is attenuated above the leeward side while the distribution of correlation function is more elongated and also exhibits a larger vertical extent above the crest. With respect to the fast wave case of c/U_m=1.4, the distribution of the correlation function is recovered in a manner similar to that in the flat-wall case. In this case, the maximum correlation coefficient exhibits only slight differences at different wave phases while the vertical distribution of the correlation function depends on the wave phase.

关键词： direct numerical simulation(DNS) wall shear stress near-wall streamwise vortex two-point correlation

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Improvements of TKC Technology Accelerate Isolation of Transgene-Free CRISPR/Cas9-Edited Rice Plants

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Rice science 2019年第2期26卷 109-117,I0016,I0017页

作者： HE Yubing ZHU Min wang lihao WU Junhua wang Qiaoyan wang Rongchen ZHAO Yunde National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan) Huazhong Agricultural University College of Life Science and Technology Huazhong Agricultural University College of Plant Science & Technology Huazhong Agricultural University Section of Cell and Developmental Biology University of California San Diego

Elimination of the CRISPR/Cas9 constructs in edited plants is a prerequisite for assessing genetic stability, conducting phenotypic characterization, and applying for commercialization of the plants. However, removal of the CRISPR/Cas9 transgenes by genetic segregation and by backcross is laborious and time consuming. We previously reported the development of the transgene killer CRISPR(TKC) technology that uses a pair of suicide genes to trigger self-elimination of the transgenes without compromising gene editing efficiency. The TKC technology enables isolation of transgene-free CRISPR-edited plants within a single generation, greatly accelerating crop improvements. Here, we presented two new TKC vectors that show great efficiency in both editing the target gene and in undergoing self-elimination of the transgenes. The new vectors replaced the CaMV35 S promoter used in our previous TKC vector with two rice promoters to drive one of the suicide genes, providing advantages over our previous TKC vector under certain conditions. The vectors reported here offered more options and flexibility to conduct gene editing experiments in rice.

关键词： genome editing suicide gene transgene killer CRISPR Cas9 transgene-free

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Programmed Self-Elimination of the CRISPR/Cas9 Construct Greatly Accelerates the Isolation of Edited and Transgene-Free Rice Plants

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Molecular Plant 2018年第9期11卷 1210-1213页

作者： Yubing He Min Zhu lihao wang Junhua Wu Qiaoyan wang Rongchen wang Yunde Zhao National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan) Huazhong Agricultural University Wuhan 430070 China College of Life Science and Technology Huazhong Agricultural University Wuhan 430070 China College of Plant Science & Technology Huazhong Agricultural University Wuhan 430070 China Section of Cell and Developmental Biology University of California San Diego La Jolla CA 92093-0116 USA

Dear Editor CRISPR gene-editing technology has successfully generated targeted mutations in rice and many other plant species （Ma et al., 2015）. Assessment of heritability and phenotypic stability of CRISPR-edited plants requires the elimination of the CRISPR construct. The presence of the CRISPR construct makes it difficult to distinguish the mutations transmitted from the previous generation from newly generated mutations by the CRISPR construct at the current generation. The existence of the CRISPR construct also greatly increases the risk of off-target effects.

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Physiological Responses of Clam(Ruditapes philippinarum)to Transport Modes with Different Temperatures

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Journal of Ocean University of China 2023年第2期22卷 517-526页

作者： BI Shijie XUE Changhu XU Lili WEN Yunqi wang lihao LI Zhaojie LIU Hongying College of Food Science and Technology Hebei Agricultural UniversityBaoding 071000China College of Food Science and Engineering Ocean University of ChinaQingdao 266003China Ocean College of Hebei Agricultural University Qinhuangdao 066000China

Given the increased circulation time after fishing,a series of changes take place in live clams,leading to a deterioration in quality even after ***,in this study,we aimed to explore the optimal mode of transportation of *** container for holding clams was reformed,and a water circulation temperature control system was *** physiological responses of clams during anhydrous and watery transportation at two temperatures(4 and 15℃)were investigated based on the aforementioned *** comparing the transportation patterns after 3 d of transport,a higher survival rate was observed at 4℃(97%)than at 15℃(63%)in the anhydrous transportation groups and a lower survival rate was observed at 4℃(93%)than at 15℃(99%)in the watery transportation *** addition,the glycogen content,condition index(CI),and adenylate energy charge(A.E.C)value were higher at4℃((40.87±0.99)mg g^(-1),13.71%±0.50%and 57.45%±1.60%)than at 15℃((30.54±0.81)mg g^(-1),9.09%±0.30%and 43.12%±1.65%)in the anhydrous transportation *** the watery transportation groups,a lower glycogen content,CI,and *** were observed at 4℃((33.78±0.84)mg g^(-1),9.78%±0.50%and 64.65%±1.25%)than at 15℃((41.53±0.93)mg g^(-1),12.72%±0.83%and 71.58%±1.27%).Results from this study show that anhydrous transportation(4℃)is the optimal transport condition for clams to maintain a high quality and good physiological ***,this study will be particularly useful for establishing shellfish transportation systems.

关键词： watery transportation anhydrous transportation clam physiological response temperature

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Self-cleaving ribozymes enable the production of guide RNAs from unlimited choices of promoters for CRISPR/Cas9 mediated genome editing

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Journal of Genetics and Genomics 2017年第9期44卷 469-472页

作者： Yubing He Tao Zhang Ning Yang Meilian Xu Lang Yan lihao wang Rongchen wang Yunde Zhao National Key Laboratory of Crop Genetic Improvement National Center of Plant Gene Research (Wuhan) Huazhong Agricultural University Section of Cell and Developmental Biology University of California San Diego

Development of tools for targeted modifications of specific DNA sequences in plants is of great importance to basic plant biology research as well as crop *** ability to cut DNA at specific locations in the genome to ... 详细信息

关键词： RGR Self-cleaving ribozymes enable the production of guide RNAs from unlimited choices of promoters for CRISPR/Cas9 mediated genome editing

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Optical properties of La₂O₃ and HfO₂ for radiative cooling via multiscale simulations

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CHINESE PHYSICS B 2024年第12期33卷 127801-127801页

作者： wang, lihao Yang, wanglin wang, Zhongyang Li, Hongchao Gong, Hao Pan, Jingyi Fan, Tongxiang Zhou, Xiao Shanghai Jiao Tong Univ Sch Mat Sci & Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ Inst Med Robot Shanghai 200240 Peoples R China

Radiative cooling materials have gained prominence as a zero-energy solution for mitigating global warming. However, a comprehensive understanding of the atomic-scale optical properties and macroscopic optical performance of radiative cooling materials remains elusive, limiting insight into the underlying physics of their optical response and cooling efficacy. La2O3 and HfO2, which represent rare earth and third/fourth subgroup inorganic oxides, respectively, show promise for radiative cooling applications. In this study, we used multiscale simulations to investigate the optical properties of La2O3 and HfO2 across a broad spectrum. First-principles calculations revealed their dielectric functions and intrinsic refractive indices, and the results indicated that the slightly smaller bandgap of La2O3 compared to HfO2 induces a higher refractive index in the solar band. Additionally, three-phonon scattering was found to provide more accurate infrared optical properties than two-phonon scattering, which enhanced the emissivity in the sky window. Monte Carlo simulations were also used to determine the macroscopic optical properties of La2O3 and HfO2 coatings. Based on the simulated results, we identified that the particle size and particle volume fraction play a dominant role in the optical properties. Our findings underscore the potential of La2O3 and HfO2 nanocomposites for environment-friendly cooling and offer a new approach for high-throughput screening of optical materials through multiscale simulations.

关键词： radiative cooling optical properties of La2O3 and HfO2 first-principles calculations Monte Carlo simulations

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How does an individual’s default behavior on an online peer-to-peer lending platform influence an observer’s default intention?

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Financial Innovation 2020年第1期6卷 591-610页

作者： Mingfeng Tang Mei Mei Cuiwen Li Xingyang Lv Xushuang Li lihao wang Sino-French Innovation Research Center School of Business AdministrationSouthwestern University of Finance and EconomicsNo.55Guanghua Cun StreetChengdu 610074China School of Business Administration Southwestern University of Finance and EconomicsChengduChina Haerbin University of Science and Technology Rongcheng Campus RongchengChina School of Economics Zhejiang UniversityHangzhouChina Syracuse University SyracuseUSA

Previous studies indicate that individuals’default behaviors on online peer-to-peer(P2P)lending platforms greatly influence other borrowers’default ***,the mechanism of this impact is not ***,there is scarce research in regard to which factors influence the relationship between an individual’s default behavior and an observer’s default *** important questions are yet to be resolved;hence,we conducted two experiments using the scenario-based research method,focusing on Chinese online P2P lending *** results indicate that an individual’s default behavior can trigger an observer’s default intention as a result of the imperfect punitive measures as they currently exist on Chinese online P2P lending *** the observer’s moral disengagement level and pragmatic self-activation level serve as mediating *** situations where an observer knows an individual’s default behavior,the level of intimacy between the defaulter and observer positively affects the relationship between their default behavior and *** intimacy level also positively influences the relationship between the individual’s default behavior and the two mediator *** on the findings,we provide management suggestions in the context of online P2P *** study sets a foundation for future research to utilize other methods to extend the present research findings to other regions and domains.

关键词： Online P2P lending Individual default behavior Observer default intention Moral disengagement Pragmatic self-activation

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Pepper variome reveals the history and key loci associated with fruit domestication and diversification

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Molecular Plant 2022年第11期15卷 1744-1758页

作者： Yacong Cao Kang Zhang Hailong Yu Shumin Chen Donghui Xu Hong Zhao Zhenghai Zhang Yinqing Yang Xiaozhen Gu Xinyan Liu Haiping wang Yaxin Jing Yajie Mei Xiang wang Véronique Lefebvre Weili Zhang Yuan Jin Dongliang An Risheng wang Paul Bosland Xixiang Li IIan Paran Baoxi Zhang Giovanni Giuliano lihao wang Feng Cheng Key Laboratory of Vegetables Geneticsand Physiology of China Ministry of Agriculture and Rural AffairsKey Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture and Rural AffairsSino-Dutch Joint Laboratory of Horticultural GenomicsInstitute of Vegetables and FlowersCAAS(Chinese Academy of Agricultural Sciences)12 Zhongguancun South StreetBeijing 100081P.R.China INRAE GAFLUnitéde Génétique et Amélioration des Fruits et Légumes84140 MontfavetFrance Institute of Vegetables Academy of Agricultural Sciences of Guangxi174 Daxue East RoadNanning 53007P.R.China Department of Plant and Environmental Sciences NMSULas CrucesNM 88003USA Institute of Plant Sciences Agricultural Research OrganizationThe Volcani CenterRishon LeZionIsrael Biotechnology and Agroindustry Division ENEAItalian National Agency for New TechnologiesEnergy and Sustainable DevelopmentVia Anguillarese301-00123 RomaItaly

Pepper(Capsicum spp.)is an important vegetable crop that provides a unique pungent sensation when *** construction of a pepper variome map,we examined the main groups that emerged during domestication and breeding of ***,their relationships and temporal succession,and the molecular events underlying the main *** results showed that the initial differentiation in fruit shape and pungency,increase in fruit weight,and transition from erect to pendent fruits,as well as the recent appearance of large,blocky,sweet fruits(bell peppers),were accompanied by strong selection/fixation of key alleles and introgressions in two large genomic ***,we identified Up,which encodes a BIG GRAIN protein involved in auxin transport,as a key domestication gene that controls erect vs pendent fruit *** up mutation gained increased expression especially in the fruit pedicel through a 579-bp sequence deletion in its 5′upstream region,resulting in the phenotype of pendent *** function of Up was confirmed by virus-induced gene *** together,these findings constitute a cornerstone for understanding the domestication and differentiation of a key horticultural crop.

关键词： Capsicum variome domestication fruit orientation pungency fruit shape sweet pepper blocky fruit pepper narrow fruit pepper

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治理现代化背景下社会组织省域发展差异分析

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中国行政管理 2016年第10期 45-50页

作者：王玉珍王李浩山西财经大学经济学院

在成熟市场经济中,作为介于政府与市场之间的第三部门,社会组织具有弥补政府缺陷和市场不足的一般功能。在我国转型时期,社会组织在市场不断发育成熟与政府职能不断转变过程中,扮演一种怎样的角色?文章通过在对我国转型期社会组织发展... 详细信息

在成熟市场经济中,作为介于政府与市场之间的第三部门,社会组织具有弥补政府缺陷和市场不足的一般功能。在我国转型时期,社会组织在市场不断发育成熟与政府职能不断转变过程中,扮演一种怎样的角色?文章通过在对我国转型期社会组织发展省域间差异进行描述性分析的基础上,运用全国省域面板数据对社会组织发展差异性的原因和影响因素进行实证研究。结果显示:在转型时期,市场化程度比较高的省份,对公共事务的治理需求也在不断增加,社会组织的发展也会比较快;在现行政府职能转变过程中,政府与社会组织在社会治理中并不是相互替代的关系,而是呈相互补充、相互促进的关系;区域经济发展水平、人口规模以及对外开放程度对社会组织发展的均具有显著的促进作用,但城市化进程的推进对社会组织发展的影响并不显著。

关键词：社会组织社会治理结构治理主体

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