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Combining the critical nitrogen concentration and machine learning algorithms to estimate nitrogen deficiency in rice from UAV hyperspectral data

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Journal of Integrative Agriculture 2023年第4期22卷 1216-1229页

作者： YU Feng-hua BAI Ju-chi JIN Zhong-yu gUO Zhong-hui YANg jia-xin chen Chun-ling School of Information and Electrical Engineering Shenyang Agricultural UniversityShenyang 110866P.R.China Key Laboratory of Intelligent Agriculture in Liaoning Province Shenyang 110866P.R.China

Rapid and large area acquisition of nitrogen(N)deficiency status is important for achieving the optimal fertilization of *** existing studies,however,focus on the use of unmanned aerial vehicle(UAV)remote sensing to diagnose N nutrition in rice,while there are fewer studies on the quantitative description of the degree of N deficiency in rice,and the effects of the critical N concentration on the spectral changes in rice have rarely been ***,based on the canopy spectral data obtained by remotely-sensed UAV hyperspectral images,the N content in rice was obtained through field *** construction method of the rice curve for the northeastern critical N concentration was studied,and on this basis,N deficiency was *** the spectrum of the critical N concentration state as the standard spectrum,the spectral reflectivity data were transformed by the ratios and differences,and the feature extraction of the spectral data was carried out by the successive projections algorithm(SPA).Finally,by taking the characteristic band as the input variable and N deficiency as the output variable,a set of multivariate linear regression(MLR),long short-term memory(LSTM)inversion models based on extreme learning machine(ELM),and the nondominated sorting genetic algorithmⅢextreme learning machine(NSgA-Ⅲ-ELM)were *** results showed two key aspects of this system:1)The correlation between the N deficiency data and original spectrum was poor,but the correlation between the N deficiency data and N deficiency could be improved by a difference change and ratio transformation;2)The inversion results based on the ratio spectrum and NSgA-Ⅲ-ELM algorithm were the best,as the R2values of the training set and validation set were 0.852 and 0.810,and the root mean square error(RMSE)values were 0.291 and 0.308,*** the perspective of the spectral data,the inversion accuracy of the ratio spectrum was better than the accuracy of the original s

关键词： UAV hyperspectral nitrogen deficiency critical nitrogen concentration NSgA-Ⅲ

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Er-xian ameliorates myocardial ischemia-reperfusion injury in rats through RISK pathway involving estrogen receptors

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Chinese Journal of Natural Medicines 2022年第12期20卷 902-913页

作者： QIANg Mingmin HAO Jiping LIU Huihui YIN jia ZHANg Hui YANg Jinxin MENg Hudie chen Yuqing gAO Yuqin College of Medicine Yan'an UniversityYan'an 716000China Department of Ultrasound Medicine Ninth Hospital of Xi'an Affiliated to Xi'an Jiaotong UniversityXi'an 710054China Department of Cardiology Ninth Hospital of Xi'an Affiliated to Xi'an Jiaotong UniversityXi'an 710054China

Curculigo orchioides(CUR)and Epimedium(EPI)are traditional Chinese medicines with estrogen-like biological activity,called Xianmao and Xianlingpi(Er-xian)in ***,whether Er-xian exerts protective effects on myocardial ischemia-reperfusion injury(MIRI)is *** study aimed to investigate the cardioprotective effects of Er-xian preconditioning against MIRI and the underlying *** or EPI was administered intragastrically to aged female rats as a monotherapy or combination therapy.2 weeks later,a rat MIRI model was *** infarction size,myocardial morphology,cTnT,cell apoptosis rate,intracellular calcium concentration,mitochondrial permeability transition pore(MPTP)opening and reperfusion injury salvage kinase(RISK)signaling pathway molecules were observed after the *** evaluate the mechanisms of Er-xian,estrogen receptors antagonists ICI 182780 and g15 were *** this study,Er-xian notably alleviated myocardial tissue damage,maintained mitochondrial morphology,reduced infarct size and cardiac markers,and increased sera levels of ***,Er-xian inhibited calcium overload and mPTP opening,and decreased cardiomyocyte *** found that the dual therapy of CUR and EPI elicited more noticeable results than CUR or EPI *** significant protective effects of Er-xian on ischemia-reperfusion myocardium were attributed to the up-regulation of AKT,ERK1/2 and gSK-3βphosphorylation *** cardioprotective effects of Er-xian were significantly reduced after estrogen receptor blockade,especially *** results indicate that Er-xian attenuates MIRI through RISK signaling pathway and estrogen receptors are the critical mediators.

关键词： Er-xian Curculigo orchioides Epimedium Myocardial ischemia-reperfusion injury Estrogen receptors RISK pathway

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Preoperative prediction of lymph node metastasis using deep learning-based features

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Visual Computing for Industry,Biomedicine,and Art 2022年第1期5卷 88-98页

作者： Renee Cattell jia Ying Lan Lei Jie Ding Shenglan chen Mario Serrano Sosa Chuan Huang Department of Biomedical Engineering Stony Brook UniversityNY 11794 Stony BrookUSA Department of Radiation Oncology Renaissance School of MedicineStony Brook UniversityStony BrookNY 11794USA Program in Public Health Stony Brook MedicineStony BrookNY 11794USA Department of Medicine Northside Hospital GwinnettGA 30046 LawrencevilleUSA Department of Radiation Oncology Medical College of WisconsinMilwaukeeWI 53226USA Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Department of Radiology Renaissance School of MedicineStony Brook UniversityStony BrookNY 11794US

Lymph node involvement increases the risk of breast cancer *** accurate non-invasive assessment of nodal involvement is valuable in cancer staging,surgical risk,and cost *** has been proposed to pre-operatively predict sentinel lymph node(SLN)status;however,radiomic models are known to be sensitive to acquisition *** purpose of this study was to develop a prediction model for preoperative prediction of SLN metastasis using deep learning-based(DLB)features and compare its predictive performance to state-of-the-art ***,this study aimed to compare the generalizability of radiomics vs DLB features in an independent test set with dissimilar *** contrast-enhancement images from 198 patients(67 positive SLNs)were used in this *** these subjects,163 had an in-plane resolution of 0.7×0.7 mm^(2),which were randomly divided into a training set(approximately 67%)and a validation set(approximately 33%).The remaining 35 subjects with a different in-plane resolution(0.78×0.78 mm^(2))were treated as independent testing set for *** methods were employed:(1)conventional radiomics(CR),and(2)DLB features which replaced hand-curated features with pre-trained Vgg-16 *** threshold determined using the training set was applied to the independent validation and testing *** feature reduction,feature selection,model creation procedures were used for both *** the validation set(same resolution as training),the DLB model outperformed the CR model(accuracy 83%vs 80%).Furthermore,in the independent testing set of the dissimilar resolution,the DLB model performed markedly better than the CR model(accuracy 77%vs 71%).The predictive performance of the DLB model outperformed the CR model for this *** interestingly,these improvements were seen particularly in the independent testing set of dissimilar *** could indicate that DLB features can ultimately result in a mor

关键词： Deep learning Radiomics Prediction model Lymph node metastasis Breast cancer

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Critical tectonic events and their geological controls on deep buried coalbed methane accumulation in Daning-Jixian Block, eastern Ordos Basin

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Frontiers of Earth Science 2023年第1期17卷 197-217页

作者： Taotao YAN Shan HE Shuai ZHENg Yado.g BAI Wei chen Yanjun MENg Shangwen JIN Huifang YAO Xiaobao jia College of Mining Engineering Taiyuan University of TechnologyTaiyuan 030024China Coal Reservoir Laboratory of National Engineering Research Center of CBM Development&Utilization China University of GeosciencesBeijing 100083China Shanxi CBM Exploration and Development Branch PetroChina Huabei Oilfield CompanyChangzhi 046000China China Coal geology group Co. LtdBeijing 100083China Research Institute of Petroleum Exploration and Development-Northwest PetroChinaLanzhou 730000China Beijing Furuibao Energy Technology Company Beijing 100176China Shanxi Province 148 Ecological geology Technology Co. LtdTaiyuan 030053China

Commercial exploration and development of deep buried coalbed methane (CBM) in Daning-Jixian Block, eastern margin of Ordos Basin, have rapidly increased in recent decades. gas content, saturation and well productivity show significant heterogeneity in this area. To better understand the geological controlling mechanism on gas distribution heterogeneity, the burial history, hydrocarbon generation history and tectonic evolution history were studied by numerical simulation and experimental simulation, which could provide guidance for further development of CBM in this area. The burial history of coal reservoir can be classified into six stages, i.e., shallowly buried stage, deeply burial stage, uplifting stage, short-term tectonic subsidence stage, large-scale uplifting stage, sustaining uplifting and structural inversion stage. The organic matter in coal reservoir experienced twice hydrocarbon generation. Primary and secondary hydrocarbon generation processes were formed by the Early and Middle Triassic plutonic metamorphism and Early Cretaceous regional magmatic thermal metamorphism, respectively. Five critical tectonic events of the Indosinian, Yanshanian and Himalayan orogenies affect different stages of the CBM reservoir accumulation process. The Indosinian orogeny mainly controls the primary CBM generation. The Yanshanian Orogeny dominates the second gas generation and migration processes. The Himalayan orogeny mainly affects the gas dissipation process and current CBM distribution heterogeneity.

关键词： deep buried coalbed methane coal reservoir accumulation evolution numerical simulation Daning-Jixian Block

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Prediction of synchronous colorectal cancers by computed tomography in subjects receiving an incomplete colonoscopy:A single-center study

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World Journal of gastroenterology 2015年第6期21卷 1857-1864页

作者： Er-Jun Pang Wei-Jie Liu jia-Yuan Peng Ni-Wei chen jian-Hong Deng Department of Surgery the Sixth People's Hospital Affiliated to Shanghai Jiao Tong University Center of Endoscopy the Sixth People's Hospital Affiliated to Shanghai Jiao Tong University Department of Radiology the Sixth People's Hospital Affiliated to Shanghai Jiao Tong University

AIM:To assess the value of computed tomography(CT)for diagnosis of synchronous colorectal cancers(SCRCs)involving incomplete ***:A total of 2123 cases of colorectal cancer(CRC)were reviewed and divided into two groups according to whether a complete or incomplete colonoscopy was *** results and final histological findings were compared to calculate the sensitivity and specificity associated with CT for detection of SCRCs following complete vs incomplete *** affecting the CT detection were also ***:Three hundred and seventy-four CRC patients underwent incomplete colonoscopy and 1749received complete ***-six cases of SCRCs were identified by CT,and 36 were *** the incomplete colonoscopy group,the sensitivity and specificity of CT were 44.8%and 93.6%,*** positive and negative predictive values were 23.6%and 95.0%,*** contrast,the sensitivity and specificity of CT for the complete colonoscopy group were 68.3%and 97.0%,while the positive and negative predictive values were 22.2%and 98.7%,*** both groups,the mean maximum dimension of the concurrent cancers identified in the CT-negative cases was shorter than in the CT-positive cases(incomplete group:P=0.02;complete group:Pgraphical proximity to synchronous cancers was identified as a risk factor for missed diagnosis(P=0.03).CONCLUSION:CT has limited sensitivity in detecting SCRCs in patients receiving incomplete *** with risk factors and negative CT results should be closely examined and monitored.

关键词： Synchronous colorectal cancer Computed tomography

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Current status of surgical treatment of rectal cancer in China

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Chinese Medical Journal 2020年第22期133卷 2703-2711页

作者： Yong Yang Han-Yang Wang Yong-Kang chen jia-jia chen Can Song Jin gu gastrointestinal Cancer Center Peking University Cancer HospitalKey Laboratory of Carcinogenesis and Translational Research(Ministry of Education)Beijing 100142China School of Life Science Tsinghua UniversityBeijing 100142China Peking-Tsinghua Center for Life Science Peking University International Cancer CenterBeijing 100142China Department of gastrointestinal Surgery Peking University Shougang HospitalBeijing 100144China

With the changing lifestyle and the acceleration of aging in the Chinese population,the incidence and mortality of colorectal cancer(CRC)have risen in the last *** the contrary,the incidence and mortality of CRC have continued to decline in the USA since the 1980s,which is mainly attributed to early screening and standardized diagnosis and *** cancer accounts for the largest proportion of CRC in China,and its treatment regimens are *** present,surgical treatment is still the most important treatment for rectal *** the first Chinese guideline for diagnosis and treatment of CRC was issued in 2010,the fourth version has been revised in *** guidelines have greatly promoted the standardization and internationalization of CRC diagnosis and treatment in *** with the development of comprehensive treatment methods such as neoadjuvant chemoradiotherapy,targeted therapy,and immunotherapy,the post-operative quality of life and prognosis of patients with rectal cancer have *** believe that the inflection point of the rising incidence and mortality of rectal cancer will appear in the near future in *** article reviewed the current status and research progress on surgical therapy of rectal cancer in China.

关键词： Rectal cancer Incidence trend Early screening Surgical treatment

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多层气泡膜隔层结构对水下冲击波衰减效果分析

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爆破 2024年第2期41卷 223-231页

作者：梁云吴红波陈永佳李基锐黄菓树马成帅张政叶风明曾辉莲广西新港湾工程有限公司南宁530200 安徽理工大学化工与爆破学院淮南232001

为分析多层气泡膜隔层结构对水下爆炸冲击波衰减效果,使用不同规格气泡膜并设计不同层数的空气隔层结构,以8号工业电雷管作为爆源,进行水下爆炸试验,获得水下冲击波参数,通过冲击波超压峰值与比冲击波能对比分析气泡膜对水下冲击波的衰... 详细信息

为分析多层气泡膜隔层结构对水下爆炸冲击波衰减效果,使用不同规格气泡膜并设计不同层数的空气隔层结构,以8号工业电雷管作为爆源,进行水下爆炸试验,获得水下冲击波参数,通过冲击波超压峰值与比冲击波能对比分析气泡膜对水下冲击波的衰减效果。结果表明:随着气泡膜层数的增加,冲击波超压峰值衰减率随之增加,1#气泡膜衰减率由48.32%上升至89.10%,2#气泡膜衰减率由86.08%上升至91.33%,3#气泡膜衰减率由87.87%上升至91.45%,4#气泡膜衰减率由90.34%上升至92.37%;薄膜隔层对比气泡膜空气隔层,其对水下冲击波的衰减影响比重较小,在层数相同的条件下,气泡膜气泡直径越大对水下冲击波的衰减效果越好,说明隔层结构中气泡对冲击波的衰减有着重要的作用;通过比冲击波能分析,气泡膜空气隔层比冲击波能消耗均超过98.50%以上,能量消耗显著。在实际应用中,可以使用气泡膜作为防护材料,能够有效地降低冲击波对被保护对象带来的危害。

关键词：水下爆炸空气隔层气泡膜冲击波衰减比冲击波能

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Treatment of leiomyomatosis peritonealis disseminata with goserelin acetate: A case report and review of the literature

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World Journal of Clinical Cases 2021年第19期9卷 5217-5225页

作者： jia-Wen Yang Yu Hua Hua Xu Liu He Hai-Zhong Huo chen-Fang Zhu Department of general Surgery Shanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineDiscipline Construction Research Center of China Hospital Development InstituteShanghai Jiao Tong UniversityShanghai 200011China

BACKgROUND Leiomyomatosis peritonealis disseminata(LPD)is a rare condition characterized by multiple pelvic and abdominal nodules,which are composed of smoothmuscle *** date,no more than 200 cases have been *** diagnosis of LPD is difficult and there are no guidelines on the treatment of ***,surgical excision is the ***,hormone blockade therapy can be an alternative *** SUMMARY A 33-year-old female patient with abdominal discomfort and palpable abdominal masses was admitted to our *** had undergone four surgeries related to uterine leiomyoma in the past 8 *** tomography revealed multiple nodules scattered within the abdominal wall and peritoneal *** symptoms and the result of the core-needle biopsy were consistent with *** patient refused surgery and was then treated with tamoxifen,ulipristal acetate(a selective progesterone receptor modulator),and goserelin acetate(a gonadotropin-releasing hormone agonist).Both tamoxifen and ulipristal acetate were not effective in controlling the disease ***,the patient achieved an excellent response when goserelin acetate was attempted with relieved syndromes and obvious shrinkage of *** largest nodule showed a 25%decrease in the sum of the longest diameters from pretreatment to *** to now,2 years have elapsed and the patient remains asymptomatic and there is no development of further *** goserelin acetate is effective for the management of *** long-term use of goserelin acetate is thought to be safe and *** blockade therapy can replace repeated surgical excision in recurrent patients.

关键词： goserelin acetate Leiomyomatosis peritonealis disseminata Hormone blockade therapy Conservative treatment Disseminated peritoneal leiomyomatosis Case report

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Rational design of asymmetric atomic Ni-P1N3 active sites for promoting electrochemical CO_(2)reduction

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Nano Research 2023年第2期16卷 2170-2176页

作者： Ming Qu Zhe chen Zhiyi Sun Danni Zhou Wenjing Xu Hao Tang Hongfei gu Tuo Liang Pengfei Hu guangwen Li Yu Wang Zhuo chen Tao Wang Binbin jia Unconventional Petroleum Research Institute China University of Petroleum(Beijing)Beijing 102249China Center of Artificial Photosynthesis for Solar Fuels School of ScienceWestlake UniversityHangzhou 310024China Energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China School of Chemistry Beihang UniversityBeijing 100191China Research Institute of Aero-Engine Beihang UniversityBeijing 102206China Research Institude of Petroleum Processing Sinopec Group(SINOPEC)Beijing 100083China Shanghai Synchrotron Radiation Facilities Shanghai Institute of Applied PhysicsChinese Academy of ScienceShanghai 201204China

The atomic-level interfacial regulation of single metal sites through heteroatom doping can significantly improve the characteristics of the catalyst and obtain surprising ***,nickel single-site catalysts(SSCs)with dual-coordinated phosphorus and nitrogen atoms were developed and confirmed(denoted as Ni-PxNy,x=1,2 and y=3,2).In CO_(2)reduction reaction(CO_(2)RR),the CO current density on Ni-PxNy was significantly higher than that of Ni-N4 catalyst without phosphorus ***,Ni-P1N3 performed the highest CO Faradaic efficiency(FECO)of 85.0%–98.0%over a wide potential range of−0.65 to−0.95 V(*** reversible hydrogen electrode(RHE)).Experimental and theoretical results revealed that the asymmetric Ni-P1N3 site was beneficial to CO_(2)intermediate adsorption/desorption,thereby accelerating the reaction kinetics and boosting CO_(2)RR *** work provides an effective method for preparing well-defined dual-coordinated SSCs to improve catalytic performance,targetting to CO_(2)RR applications.

关键词： nickel single-site catalysts asymmetric coordination CO_(2)reduction reaction atomic interface

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阴茎背深静脉丛预缝合技术在机器人辅助腹腔镜前列腺根治性切除术中的临床疗效

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中华医学杂志 2024年第38期104卷 3608-3611页

作者：王一凡王明帅杨飞亚陈东韩苏军贾博林张勇邢念增国家癌症中心国家肿瘤临床医学研究中心中国医学科学院北京协和医学院肿瘤医院泌尿外科北京

回顾分析2020年10月至2022年4月在中国医学科学院肿瘤医院接受机器人辅助腹腔镜下Vattikuti泌尿外科研究所前列腺癌根治术(VIP)的33例患者的临床资料, 其中18例采用传统VIP技术, 15例采用预缝合阴茎背深静脉丛(DVC)的VIP技术。传统VIP... 详细信息

回顾分析2020年10月至2022年4月在中国医学科学院肿瘤医院接受机器人辅助腹腔镜下Vattikuti泌尿外科研究所前列腺癌根治术(VIP)的33例患者的临床资料, 其中18例采用传统VIP技术, 15例采用预缝合阴茎背深静脉丛(DVC)的VIP技术。传统VIP组与预缝合DVC VIP组年龄分别为(66.1±7.3)和(66.6±5.7)岁;体质指数(BMI)分别为(24.3±2.9)、(25.3±2.6)kg/m2;医疗费用分别为(91 797.0±7 029.6)和(87 106.6±7 031.4)元, 差异均无统计学意义(均P>0.05)。33例手术均顺利完成, 无中转开放病例。传统VIP组手术时间长于预缝合DVC VIP组[(193.0±37.2)比(171.1±16.1)min)];术中出血量多于预缝合DVC VIP组[(68.3±22.8)比(44.0±9.1)ml)], 均P<0.05, 无患者围手术期输血, 术后30 d内无患者出现并发症。33例患者切缘均为阴性。DVC预缝合技术在机器人辅助腹腔镜VIP前列腺根治性切除术中能够减少术中出血, 缩短手术时间, 疗效较好。

关键词：前列腺肿瘤背深静脉丛机器人根治性前列腺切除术

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