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| 1 | Xa7, a new executor R gene that confers durable and broad-spectrum resistance to bacterial blight disease in rice显示文摘Bacterial blight(BB)is a globally devastating rice disease caused by Xanthomonas oryzae pv.oryzae(Xoo).The use of disease resistance(R)genes in rice breeding is an effective and economical strategy for the control of this disease.Nevertheless,a majority of R genes lack durable resistance for long-term use under global warming conditions.Here,we report the isolation of a novel executor R gene,Xa7,that confers extremely durable,broad-spectrum,and heat-tolerant resistance to Xoo.The expression of Xa7 was induced by incompatible Xoo strains that secreted the transcription activator-like effector(TALE)AvrXa7 or PthXo3,which recognized effector binding elements(EBEs)in the Xa7 promoter.Furthermore,Xa7 induction was faster and stronger under high temperatures.Overexpression of Xa7 or co-transformation of Xa7 with avrXa7 triggered a hypersensitive response in plants.Constitutive expression of Xa7 activated a defense response in the absence of Xoo but inhibited the growth of transgenic rice plants.In addition,analysis of over 3000 rice varieties showed that the Xa7 locuswas found primarily in the indica and aus subgroups.A variation consisting of an 11-bp insertion and a base substitution(G to T)was found in EBEAvrXa7 in the tested varieties,resulting in a loss of Xa7 BB resistance.Through a decade of effort,we have identified an important BB resistance gene and characterized its distinctive interaction with Xoo strains;these findings will greatly facilitate research on the molecular mechanism of Xa7-mediated resistance and promote the use of this valuable gene in breeding. | Xifeng Chen Pengcheng Liu Le Mei Xiaoling He Long Chen Hui Liu Shurong Shen Zhandong Ji Xixi Zheng Yuchen Zhang Zhenyu Gao Dali Zeng Qian Qian Bojun Ma | 2021 | Plant Communications2021，2，3： | 9 |
| 2 | A Modified Fuzzy C-Means Algorithm for Brain MR Image Segmentation and Bias Field Correction显示文摘在量的大脑图象分析,从大脑的精确大脑织物分割磁性的回声图象(MRI ) 是关键步。是医药图象处理的地里的最重要、困难的问题被认为。先生图象的质量被部分卷效果,噪音,和紧张不同类影响,它使分割任务变为极其挑战性。我们在场为分割和大脑先生的偏爱地修正的一个新奇模糊 c 工具算法(RCLFCM ) 想象。我们采用一个新灰色差别的系数并且设计一个新影响因素测量邻居象素的效果,以便反噪音的坚韧性能被提高。而且,我们由增加偏爱域评价模型在图象克服紧张不同类并且同时分割大脑先生图象重新定义 FCM (模糊 c 工具) 的客观函数。我们也由把象素灰色值不同与它的会员相结合构造一个新空间函数,并且充分利用在象素之间的空格信息更新会员。与由与噪音和紧张不同类的不同层次在合成先生图象上使用类似精确性的另外的最先进的途径相比,建议算法与高精确性和坚韧性产生结果到噪音。 | Wen-Qian Deng Xue-Mei Li Xifeng Gao Cai-Ming Zhang | 2016 | Journal of Computer Science & Technology2016，31，3： | 6 |
| 3 | J Alloy Compd显示文摘 | Ding Xifeng Liu Yingjia Gao Ling | 2008 | 458:3462008，458，： | 1 |
| 4 | Production ofN-AcetylD-Neuraminic acid by use of an efficient spore surface display system显示文摘 | Xiaoman Xu Chao Gao Xifeng Zhang | 2011 | Applied Env Microbio2011，77，10： | 1 |
| 5 | Feasibility study on sinkhole monitoring with fiber optic strain sensing nerves显示文摘Anthropogenic activity-induced sinkholes pose a serious threat to building safety and human life nowadays.Real-time detection and early warning of sinkhole formation are a key and urgent problem in urban areas.This paper presents an experimental study to evaluate the feasibility of fiber optic strain sensing nerves in sinkhole monitoring.Combining the artificial neural network(ANN)and particle image velocimetry(PIV)techniques,a series of model tests have been performed to explore the relationship between strain measurements and sinkhole development and to establish a conversion model from strain data to ground settlements.It is demonstrated that the failure mechanism of the soil above the sinkhole developed from a triangle failure plane to a vertical failure plane with increasing collapse volume.Meanwhile,the soil-embedded fiber optic strain sensing nerves allowed deformation monitoring of the ground soil in real time.Furthermore,the characteristics of the measured strain profiles indicate the locations of sinkholes and the associated shear bands.Based on the strain data,the ANN model predicts the ground settlement well.Additionally,micro-anchored fiber optic cables have been proven to increase the soil-to-fiber strain transfer efficiency for large deformation monitoring of ground collapse. | Yuxin Gao Honghu Zhu Liang Qiao Xifeng Liu Chao Wei Wei Zhang | 2023 | Journal of Rock Mechanics and Geotechnical Engineering2023，15，11： | 0 |
| 6 | Sketch simplification guided by complex agglomeration显示文摘We propose a novel method for vector sketch simplification based on the simplification of the geometric structure that is extracted from the input vector graph, which can be referred to as a base complex.Unlike the sets of strokes, which are treated in the existing approaches, a base complex is considered to be a collection of various geometric primitives. Guided by the shape similarity metrics that are defined for the base complex, an agglomeration procedure is proposed to simplify the base complex by iteratively merging a pair of geometric primitives that exhibit the minimum cost into a new one. This simplified base complex is finally converted into a simplified vector graph. Our algorithm is computationally efficient and is able to retain a large amount of useful shape information from the original vector graph, thereby achieving a tradeoff between efficiency and geometric fidelity. Furthermore, the level of simplification of the input vector graph can be easily controlled using a single threshold in our method. We make comparisons with some existing methods using the datasets that have been provided in the corresponding studies as well as using different styles of sketches drawn by artists. Thus, our experiments demonstrate the computational efficiency of our method and its capability for producing the desirable results. | Yue LIU Xuemei LI Pengbo BO Xifeng GAO | 2019 | Science China(Information Sciences)2019，62，5： | 0 |
| 7 | Fine-needle aspiration for periprosthetic fluid removal after implantation of a remote internal-port tissue expander显示文摘Background:Use of internal filling ports in tissue expander–based reconstructions are advantageous because of easier self-care,lower infection rates,and fewer instances of capsule formation.The appearance of periprosthetic fluid accumulation after internal-port tissue expander implantation is a common complication that warrants treatment.In this study,we introduced a noninvasive method using fine-needle aspiration(FNA)to remove fluids accumulated after implantation of a remote internal-port tissue expander.Methods:In this study,245 patients who underwent implantation of remote internal-port tissue expanders in our hospital from July 1,2012,to July 1,2019,were included and divided into two groups.In the control group,patients underwent tissue expander implantation before July 1,2016,and large quantities of fluids were removed with surgical aspiration procedures in most cases.In the FNA group,the patients underwent implantation after July 1,2016,and large quantities of fluids were removed first with the FNA procedure.Patients’demographic data,indications for FNA application,and related complications were collected and analyzed.Results:Overall,395 expanders were placed in 245 patients.Postoperative management was similar in both groups.Fluids were managed with 23 expanders in the control group and with 31 expanders in the FNA group.There was no difference in the fluid aspiration rate between the two groups.The surgical aspiration rate was 11.1%(23/208)in the control group.The success rate of FNA was 90.3%(28/31).In the FNA group,the surgical aspiration rate was 1.6%(3/187),which was significantly lower than that in the control group.There were no significant differences in complications between the two groups.Conclusion:FNA can be used for periprosthetic fluid removal after the implantation of a remote internal-port tissue expander in most cases.This method is more convenient and safer than surgical aspiration for the postoperative management of internal-port tissue expander implantation. | Xifeng Lin Shuchen Gu Yashan Gao Hainan Zhu Bin Gu Feng Xie Qingfeng Li Tao Zan Haizhou Li | 2021 | Chinese Journal Of Plastic and Reconstructive Surgery2021，3，3： | 0 |
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