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Intelligent identification of landslides in loess areas based on the improved YOLO algorithm:a case study of loess landslides in Baoji City

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Journal of Mountain Science 2023年第11期20卷 3343-3359页

作者： liu Qing WU Ting-ting DENG Ya-hong liu zhi-heng School of Mechanical and Electrical Engineering Huainan Normal UniversityHuainan 232038China School of Geomatics Anhui University of Science and TechnologyHuainan 232001China School of Geology Engineering and Geomatics Chang’an UniversityXi’an 710064China School of Aerospace Science and Technology Xidian UniversityXi'an 710064China

Loess landslides are one of the geological hazards prevalent in mountainous areas of Loess Plateau,seriously threatening people's lives and property *** identification of landslides is a prerequisite for reducing the risk of landslide *** landslide interpretation methods often have the disadvantage of being laborious and difficult to use on a large scale compared with the recently developed deep learning-based landslide detection *** this study,we propose an improved deep learning model,landslide detectionyou only look once(LD-YOLO),based on the existing you only look once(YOLO)model for the intelligent identification of old and new landslides in loess ***,remote sensing images of landslides in Baoji City,Shaanxi Province,China are acquired from the Google Earth Engine *** landslide images of Baoji City(excluding Qianyang County)are used to establish a loess landslide dataset for training the *** landslide data of Qianyang County is used to verify the detection performance of the *** focal and efficient IoU(Focal-EIoU)loss function and efficient channel attention(ECA)mechanism are incorporated into the 7th version of YOLO(YOLOv7)model to construct the LD-YOLO model,which makes it more suitable for the landslide detection *** experiments yielded an improved LD-YOLO model with average precision of 92.05%,precision of 92.31%,recall of 90.28%,and F1-score of 91.28%for loess landslide *** landslides in Qianyang County were divided into two test sets,new landslides and old landslides,which were used to test the detection performance of LD-YOLO for both types of *** results show that LD-YOLO detects old landslides with a detection precision of 82.75%and a recall of 80%.When detecting new landslides,the detection precision is 94.29%and the recall is 91.67%.It indicates that our proposed LD-YOLO model has strong detection performance for both new and old landslides in loess areas

关键词： Loess landslide Deep learning Attention mechanism Data augmentation You only look once(YOLO)

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Growth characteristics of directionally solidified Al_2O_3/YAG/ZrO_2 ternary hypereutectic in situ composites under ultra-high temperature gradient

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International Journal of Minerals,Metallurgy and Materials 2011年第1期18卷 121-125页

作者： Hai-jun Su Jun Zhang Lin liu heng-zhi Fu State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi＇an 710072 China

Oxide eutectic ceramic in situ composites have attracted significant interest in the application of high-temperature structural materials because of their excellent high-temperature strength,oxidation and creep resistance,as well as outstanding microstructural *** directionally solidified ternary Al2O3/YAG/ZrO2 hypereutectic in situ composite was successfully prepared by a laser zone remelting method,aiming to investigate the growth characteristic under ultra-high temperature *** microstructures and phase composition of the as-solidified hypereutectic were characterized by using scanning electron microscopy（SEM）,energy dispersive spectroscopy（EDS）,and X-ray diffraction（XRD）.The results show that the composite presents a typical hypereutectic lamellar microstructure consisting of fine Al2O3 and YAG phases,and the enriched ZrO2 phases with smaller sizes are randomly distributed at the Al2O3/YAG interface and in Al2O3 *** power and scanning rate strongly affect the sample quality and microstructure ***,coarse colony microstructures were also observed,and their formation and the effect of temperature gradient on the microstructure were discussed.

关键词： eutectics ceramic materials microstructure thermal gradients remelting solidification

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Genetic Analysis of Stripe Disease Resistance in Rice Restorer Line C224 Using Major Gene plus Polygene Mixed Effect Model

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Rice science 2012年第3期19卷 202-206页

作者： Zheng Wen-Jing liu zhi-heng ZHAO Jia-Ming CHEN Wen-Fu Shenyang Agricultural University Shenyang 110161China Liaoning Academy of Agricultural Sciences Shenyang 110161China

The inheritance of stripe disease resistance in a rice restorer line C224 was analyzed using the mixed effect model of major gene plus polygene for quantitative *** addition,the resistance was investigated in seven crosses of C224 with maintainer *** results showed that the stripe resistance of C224 was controlled by two major genes with additive-dominance-epistasis effects plus polygenes with additive-dominance effects （E-1 model）.These two genes had additive effects of-12.47% and-24.75%,respectively,showing negative dominance *** were significant epistasis and interaction effects between the two major *** heritability of the two major genes was 92.12%,while that of polygenes was 2.74%,indicating that the stripe resistance had dominant major gene *** the seven crosses,five displayed high or medium resistance to the stripe disease.

关键词： rice rice stripe resistance major gene plus polygene mixed genetic model restorer line

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Analysis of the diversity and function of the alleles of the rice blast resistance genes Piz-t, Pita and Pik in 24 rice cultivars

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Journal of Integrative Agriculture 2016年第7期15卷 1423-1431页

作者： WANG Yan ZHAO Jia-ming ZHANG Li-xia WANG Ping WANG Shi-wei WANG Hui WANG Xiao-xi liu zhi-heng Zheng Wen-jing Plant Protection College Shenyang Agricultural University Agricultural Crops Molecular Improving Laboratory Liaoning Academy of Agricultural Sciences Department of Plant Pathology China Agricultural University

Understanding the sequence diversity of rice blast resistance genes is important for breeding new resistant rice cultivars against the rice blast fungusMagnaporthe oryzae. In this study, we selected 24 rice cultivars with different genetic back-grounds to study the alelic diversity of rice blast resistance genesPiz-t, Pitaand Pik. For Piz-t, a total of 17 alelic types were found within the 24 cultivars. Blast inoculations showed that most of the mutations can affect the function of the resistance gene. For Pita, except for the difference at the 918th amino acid, a majority of the 21 mutations were detected among the cultivars. Inoculations with blast isolates carryingAvr-Pita revealed that cultivars with mutations in other sites except for the 918th amino acid did not affect the function of thePita gene. ForPik, a total of six alelic types were found within the 24 cultivars, but ifve of them lost the function of the resistance gene. In addition, we found thatPiz-t, Pita and Pik were expressed constitutively in the 24 rice cultivars and the expression level was not related to resistance. Our results have provided the sequence diversity information of the resistance genesPiz-t, Pita and Pik among the popular rice cultivars grown in the northeast region of China. Keywords：resistance gene, avirulence gene, aleles, function, genetic evolution zae（M. oryzae）, is one of the most destructive diseases in rice production worldwide. Over the years, comprehensive studies on rice blast resistance have been conducted （Silue et al. 1992）. The resistance in newly cultivated rice cultivars to M. oryzae can be lost quickly due to the high level of instability in the genome of the fungus （Bonmanet al. 1992）. Previous studies show that cultivars with durable and broad-spectrum resistance againstM. oryzae carry multiple major resistance （R） and minor resistance genes （liuet al. 2014）. An effective way to control rice blast disease is, therefore, to breed rice cultivars with multiple R

关键词： resistance gene avirulence gene aleles function genetic evolution

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Application of Thin Bed Log Evaluation Techniques in Dagang Oilfield

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China Oil & Gas 1995年第3期2卷 31-32页

作者： Fan zhiren, Jiao Cuihua,liu Dewu and heng zhi(Dagang Well Logging Coinpany) Dagang Well Logging Company

ＡｐｐｌｉｃａｔｉｏｎｏｆＴｈｉｎＢｅｄＬｏｇＥｖａｌｕａｔｉｏｎＴｅｃｈｎｉｑｕｅｓｉｎＤａｇａｎｇＯｉｌｆｉｅｌｄ￥ＦａｎＺｈｉｒｅｎ，ＪｉａｏＣｕｉｈｕａ，ＬｉｕＤｅｗｕａｎｄＨｅｎｇｚｈｉ（ＤａｇａｎｇＷｅｌ... 详细信息

ＡｐｐｌｉｃａｔｉｏｎｏｆＴｈｉｎＢｅｄＬｏｇＥｖａｌｕａｔｉｏｎＴｅｃｈｎｉｑｕｅｓｉｎＤａｇａｎｇＯｉｌｆｉｅｌｄ￥ＦａｎＺｈｉｒｅｎ，ＪｉａｏＣｕｉｈｕａ，ＬｉｕＤｅｗｕａｎｄＨｅｎｇｚｈｉ（ＤａｇａｎｇＷｅｌｌＬｏｇｇｉｎｇＣｏｉｎｐａｎｙ）...

关键词： Log Evaluation Thin layer Technology Oil reservir

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基于生态逻辑的供给侧结构性改革探析

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经济问题 2017年第8期 21-27页

作者：刘治恒姚亮西南大学政治与公共管理学院重庆400715

社会需求总量不足和社会总供给结构性过剩,是我国当前经济发展中的主要矛盾,而解决这一供求矛盾的关键就在于供给侧的结构性改革。通过分析当前结构性改革思路,指出了其最大缺陷在于将生态作为资本的形式,忽略生态在供给侧的要素地位;... 详细信息

社会需求总量不足和社会总供给结构性过剩,是我国当前经济发展中的主要矛盾,而解决这一供求矛盾的关键就在于供给侧的结构性改革。通过分析当前结构性改革思路,指出了其最大缺陷在于将生态作为资本的形式,忽略生态在供给侧的要素地位;基于生态资本化使用的逻辑构建的改革方案具有不彻底性,不利于推进经济结构的调整;因而提出重构供给侧的结构要素,探索一种基于生态逻辑的供给侧结构性改革思路,即在生产端以生态思维为指导,以生态供给为目标,构建完善的生态评价体系以平衡供需关系。

关键词：经济转型供给侧改革生态逻辑

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“历史科学”的唯物史观解读

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自然辩证法研究 2020年第4期36卷 113-117页

作者：刘治恒孙道进西南大学三峡库区经济社会发展研究中心重庆400715

唯物史观认为,自然史和人类史的相互制约,决定了真正的科学绝非纯粹的关于自然的物的科学,而是“关于自然的人的科学”或“关于人的自然科学”,即历史的科学。这样的科学,才是“最高意义上的革命力量”。

关键词：自然科学人的科学历史的科学

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Mesh-supported V2O5-WO3/TiO2 nanosheet array catalysts for efficient removal of NOx

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Tungsten 2025年第1期7卷 100-111页

作者： zhi-Qi Zhang liu Yang Wen Luo Vladimir An Jing Li Bao-Dan liu School of Materials Science and Engineering Northeastern University Foshan Graduate School of Innovation Northeastern University Kizhner Research Center School of Advanced Manufacturing Technologies Tomsk Polytechnic University

The design and synthesis of vanadium-based denitration catalysts with low-temperature activity pose significant challenges in the field of toxic gas *** this study,we have developed a novel approach to fabricate highly efficient V2O5-WO3/TiO2monolithic mesh catalysts for NOxreduction at low ***,TiO2nanosheets with strong adhesion and large surface area were grown on Ti mesh using plasma electrolytic oxidation technology and hydrothermal ***,super-small traces of WO3and V2O5active nano-species were subsequently deposited on TiO2nanosheets using the deposition-precipitation *** to traditional ceramic-based V2O5-WO3/TiO2catalysts,our V2O5-WO3/TiO2monolithic mesh catalyst exhibits superior mechanical performance,excellent thermal conductivity,lower pressure drop,higher utilization of active components,and stronger synergistic ***,the V2O5-WO3/TiO2monolithic mesh catalysts exhibited excellent low-temperature catalytic activity with 98% of NOxconversion at 220℃,and remarkable long-term SO2tolerance and water resistance in the selective catalytic reduction（SCR） of NOxwith *** SCR reaction of tiny V2O5and WO3active species supported on TiO2nanosheets directly demonstrated to follow the Eley-Rideal mechanism by in situ infrared spectra.

关键词： Low temperature activity Monolithic mesh catalysts NH3-SCR SO2 tolerance V2O5-WO3/TiO2

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将云南原小单孢菌转入纤维化纤维菌的多相分类研究

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微生物学报 2006年第4期46卷 511-515页

作者：张建丽刘志恒北京理工大学生命科学与技术学院北京100081 中国科学院微生物研究所微生物资源国家重点实验室北京100080

对中国普通微生物菌种保藏中心(CGMCC)保藏的云南原小单孢菌(Promicromonospora yunnanensis)AS4.1333进行的多相分类研究表明,菌株AS4.1333与纤维化纤维菌(Cellulosimicrobium cellulans)DSM43879T关系密切,它们的16S rRNA基因序列相似性为99.6%,DNA同源性为89.3%。胞壁组分、枝菌酸、甲基萘醌、磷酸类脂和DNAG+Cmol%测定等化学分类结果支持了上述结论。在形态和生理生化特性上,菌株AS4.1333与CellulosimicrobiumcellulansDSM43879T之间也表现出非常相似的性状。根据系统发育分析、化学分类、形态和生理生化特性、DNA同源性测定等研究结果,对菌株AS4.1333的分类地位做了修正,将其从原小单孢菌属中排除,认为菌株AS4.1333与Cellulosimicrobium cellulansDSM43879T是同一个种,建议将菌株AS4.1333由云南原小单孢菌(Promicromonosporayunnanensis)转入纤维化纤维菌(Cellulosimicrobium cellulans)。

关键词：纤维化纤维菌(Cellulosimicrobium cellulans) 云南原小单孢菌(Promicromonospora yunnanensis) 多相分类

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青光眼睫状体炎综合征临床分析

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中国实用眼科杂志 2012年第8期30卷 998-1000页

作者：刘志恒郑曰忠天津市滨海新区大港医院眼科天津300270 天津市眼科医院天津300020

目的探讨青光眼睫状体炎综合征患者的临床表现、治疗、病程和视力预后。方法收集近5年来在眼科就诊的青光眼睫状体炎综合征患者49例（55只眼），常规行矫正远视力、裂隙灯显微镜、眼底镜、房角镜和眼压检查，部分患者行视野检查，分析... 详细信息

目的探讨青光眼睫状体炎综合征患者的临床表现、治疗、病程和视力预后。方法收集近5年来在眼科就诊的青光眼睫状体炎综合征患者49例（55只眼），常规行矫正远视力、裂隙灯显微镜、眼底镜、房角镜和眼压检查，部分患者行视野检查，分析其临床特点、治疗效果和视力预后。结果49例患者中，男30例，女19例；发病时年龄18—62岁，平均（37．2±15．6）岁。其中单眼发病43例，双眼交替发病6例。初次发病者32例，反复发作者17例，发作次数为2—11次。经系统抗炎和降眼压治疗后所有患者眼压均得以控制，43例患者（48只眼）视功能恢复；有6例患者（7只眼）因反复发作出现杯盘比扩大和视野损害。结论青光眼睫状体炎综合征表现为单眼复发性虹膜睫状体炎并伴有眼压升高，多数患者经治疗后视力预后较佳，少数患者反复发作后可出现青光眼性视野损害。该病在临床上易被误诊或漏诊，临床医生应掌握其诊治要点，并对反复发作的患者定期观察视野及视盘变化，以免造成永久性视功能损害。

关键词：青光眼睫状体炎综合征葡萄膜炎青光眼

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