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Selenium and Alzheimer’s disease 被引量:1
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作者 Jiajie Gu Jiaxiang Gu Lei Yu 《Chinese Chemical Letters》 2025年第8期249-254,共6页
Selenium is an essential trace element for human beings and it plays a significant role for the health of human nervous system.The strong antioxidant effect of selenium endows the element with the ability to treat var... Selenium is an essential trace element for human beings and it plays a significant role for the health of human nervous system.The strong antioxidant effect of selenium endows the element with the ability to treat various diseases,including Alzheimer's disease(AD).In the body,selenium exists in the forms of selenoproteins,which could treat AD through various pathways,such as inhibiting peroxidation,inhibiting apoptosis signal pathway,reducing the levels of Aβin neurons and alleviating Tau protein caused by pathological damage.This article aims to comprehensively elaborate on the relationship between selenium and AD. 展开更多
关键词 SELENIUM Alzheimer'sdisease SELENOPROTEIN TREATMENT ANTIOXIDANT
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The impact of follicle-stimulating hormone and the sperm concentration on the success of varicocelectomy
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作者 Li-Hong Wang Lei Zheng +1 位作者 Hui Jiang Tao Jiang 《Asian Journal of Andrology》 2025年第5期657-658,共2页
Dear Editor,Varicocele(VC)is a vascular condition characterized by abnormal tortuosity and dilation of the pampiniform plexus veins within the spermatic cord.VC is commonly observed in young adults,predominantly on th... Dear Editor,Varicocele(VC)is a vascular condition characterized by abnormal tortuosity and dilation of the pampiniform plexus veins within the spermatic cord.VC is commonly observed in young adults,predominantly on the left side;it is a frequent cause of male infertility and can lead to testicular hypofunction,pain,and discomfort.Microsurgical varicocelectomy is the gold standard for treating infertility caused by VC.VC repair is strongly recommended for couple infertility,oligoasthenoteratozoospermia(OAT),Grade 2 or 3 clinical VC,partner age<37 years,patient age<40 years,or testicular hypotrophy in children and adolescents. 展开更多
关键词 vascular condition follicle stimulating hormone treating infertility pampiniform plexus veins abnormal tortuosity dilation pampiniform plexus veins VARICOCELECTOMY male infertility microsurgical varicocelectomy
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Concise synthesis of NDP-activated uronic acid by an oxidation reaction insertion strategy
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作者 Nana Yang Rui Yuan +5 位作者 Xinyue Fu Xiao Tian Jin Yu Shengzhou Ma Liuqing Wen Jiabin Zhang 《Chinese Chemical Letters》 2025年第8期296-302,共7页
Uronic acids are prevalent components of crucial glycoconjugates,pivotal in various biological processes.In nature,NDP-uronic acids,the nucleosides-activated uronic acids,serve as glycosylation donors catalyzed by uro... Uronic acids are prevalent components of crucial glycoconjugates,pivotal in various biological processes.In nature,NDP-uronic acids,the nucleosides-activated uronic acids,serve as glycosylation donors catalyzed by uronosyltransferases(UATs)to construct glycans containing uronic acids.Despite their biological importance,the synthesis of naturally occurring NDP-uronic acids on a large scale remains challenging.Here,we developed an oxidation reaction insertion strategy for the efficient synthesis of NDP-uronic acids,and 11 NDP-uronic acids were successfully prepared in good yield and on a large scale.The prepared NDP-uronic acids can be used to explore new uronosyltransferases and synthesize uronic acids containing carbohydrates for fundamental research. 展开更多
关键词 NDP-uronic acids BIOCATALYSIS Enzyme-mediated biomimetic synthesis Oxidation reaction insertion strategy
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Research progress on the mechanism of acupuncture treatment for vascular dementia 被引量:1
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作者 Wei SUN Ying-hua CHEN +2 位作者 Tong-yan LIU Xiao-qing SU Rui-qi QIN 《World Journal of Acupuncture-Moxibustion》 CAS CSCD 2024年第4期270-276,共7页
Acupuncture can intervene with and treat vascular dementia(VD)through multiple targets and pathways.The mechanisms of its action involve inhibiting central inflammatory responses,regulating neuronal synaptic plasticit... Acupuncture can intervene with and treat vascular dementia(VD)through multiple targets and pathways.The mechanisms of its action involve inhibiting central inflammatory responses,regulating neuronal synaptic plasticity,modulating oxidative stress,reducing neuronal apoptosis,and adjusting cellular autophagy.This paper summarizes researches on the mechanisms of acupuncture treatment for vD over the past decade,aiming to provide theoretical support for the clinical application of acupuncture in treating VD and offer a reference for future in-depth research in this field. 展开更多
关键词 ACUPUNCTURE Vascular dementia Mechanism of action REVIEW
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Synthesis of coral-like structures of Pr-Yb co-doped YIG: Structural,optical, magnetic and antimicrobial properties 被引量:1
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作者 A.Fernandez Francisca P.Araujo +7 位作者 Y.Guerra S.Castro-Lopes J.Matilla-Arias Idglan S.de Lima Edson C.Silva-Filho Josy A.Osajima F.Guerrero R.Pena-Garcia 《Journal of Rare Earths》 SCIE EI CAS CSCD 2024年第3期543-554,I0004,共13页
Coral-like structures of the Y_(3-x)Pr_(x)Fe_(5-y)Yb_(y)O_(12),(0.00 ≤ x ≤ 0.04, 0.00 ≤ y ≤ 0.02) compound were synthesized using the sol-gel method. Structural investigation certified the YIG cubic crystal struct... Coral-like structures of the Y_(3-x)Pr_(x)Fe_(5-y)Yb_(y)O_(12),(0.00 ≤ x ≤ 0.04, 0.00 ≤ y ≤ 0.02) compound were synthesized using the sol-gel method. Structural investigation certified the YIG cubic crystal structure formation, without any secondary phase. It is shown that, the relatively large ionic radius of the dopant cations results in an expansion of the lattice parameter, variations in the Iona-O-Iondangle, Iona-O,Iond-O and Ionc-O bond distances and decrease in the average crystallite size. Fourier transform infrared(FTIR) and Raman measurements are essential to testify the single-phase formation of YIG crystal structure and are observed changes in the stretching and vibrational modes, respectively. The morphological study, energy dispersive spectroscopy(EDS) spectra and textural properties show corallike structures, peaks associated with Pr^(3+) and Yb^(3+) atoms and the effect of dopants on surface area,diameter, and pore volume, respectively. The optical analysis from diffuse reflectance spectra witnessed an increase in the optical gap band, a decrease in Urbach energy and blue shift in the charge transfer,correlated with the expansion of the unit cell due to the dopant's insertion in the YIG structure. A typical ferrimagnetic behavior is exhibited by the Y_(3-x)Pr_(x)Fe_(5-y)Yb_(y)O_(12)compound. The saturation magnetization(M_(s)), cubic anisotropy constant(K_(1)) and coercive field(H_(c)) increase with the Pr^(3+)cations content, as consequence of their magnetic nature and distribution around of Fe^(3+)ions due to the coexistence with the Yb^(3+). Finally, for the first time, antibacterial tests by mean of the direct contact method were performed for YIG co-doped with Pr^(3+)and Yb^(3+)and it is shown that, relatively high dosages of Pr^(3+) cations favored the activity against S. aureus, therefore, a new biological property for YIG doped with rare earths is presented. 展开更多
关键词 Yttrium iron garnet(YIG) Coral-like structures Rare earths Band gap energy Magnetic properties Antimicrobial properties
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Low heritability of social phenotypes in a nonpasserine waterbird
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作者 Piotr Minias Joanna Drzewińnska-Chanko Radostaw Wtodarczyk 《Current Zoology》 SCIE CAS CSCD 2024年第4期465-471,共7页
Most behavioral traits are known to be weakly heritable,possibly due to their extreme complexity and flexibility.Despite this general pattern,within-species variation in avian colony size choice has been reported to h... Most behavioral traits are known to be weakly heritable,possibly due to their extreme complexity and flexibility.Despite this general pattern,within-species variation in avian colony size choice has been reported to have a strong additive genetic component,but we are aware of no attempts to assess the heritability of avian sociality at the finer spatial scale.Here,we used an animal model and parent-offspring regression to quantify additive genetic variance in social phenotype(local nesting density)in a nonpasserine waterbird,the common tern Sterna hirundo.For this purpose,we used a novel experimental framework,where variation in the social environment was generated by providing birds with artificial patches of attractive nesting substrate that markedly varied in size.During 2011-2019,we collected data on social preferences for either low or high nesting density in over 250 individuals,either kin(mostly parent-offspring relationships)or non-kin recorded breeding multiple times across years.All heritability estimates of local nesting density were low(<0.10),irrespectively of fixed effects(sex and year)included in the models,data used in the modeling(all individuals vs.early recruits),or methodological approach(animal model vs.parent-offspring regression).We conclude that avian sociality,as measured at the local scale,may be much less heritable than colony size choice,as measured at the landscape level.Our study adds to the understanding of additive genetic variance in avian behavior,and it underlines a scale dependency in the heritability of behavioral traits. 展开更多
关键词 animal model birds common tern HERITABILITY parent-offspring regression sociality.
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Long-term tadalafil once daily in Chinese men with erectile dysfunction:a 2-year final analysis of a post-marketing,multicenter,randomized,open-label trial 被引量:1
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作者 Hui Jiang Lian-Ming Zhao +7 位作者 Su Yan Ji-Hong Liu Zhao-Hui Zhu Jin-Dan Luo Yu-Tian Dai Fu-Biao Li Hao-Cheng Lin Zhi-Chao Zhang 《Asian Journal of Andrology》 SCIE CAS CSCD 2024年第3期282-287,共6页
The long-term safety and effectiveness of once-daily tadalafil is crucial,but limited data are available in Chinese patients witherectile dysfunction(ED).In this post-marketing,multicenter,randomized,open-label trial ... The long-term safety and effectiveness of once-daily tadalafil is crucial,but limited data are available in Chinese patients witherectile dysfunction(ED).In this post-marketing,multicenter,randomized,open-label trial with 2-year follow-up,635 ED caseswere randomized to receive daily oral tadalafil 2.5 mg or 5 mg for 3 months,of whom 580 continued once-daily tadalafil 5 mg for21 months.Treatment-emergent adverse events in the 12-month and 24-month period were similar,with the most common beingviral upper respiratory tract infection,upper respiratory tract infection,and headache.Significant improvement from baseline inthe International Index of Erectile Function-Erectile Function(IIEF-EF)score was detected at month 12(least squares mean[LSM]change:7.9,95%confidence interval[CI]:7.5–8.4,P<0.001)and was maintained to month 24(LSM change:8.6,95%CI:8.1–9.0,P<0.001).The proportions of patients regaining normal erectile function(IIEF-EF score≥26)were 43.7%and 48.0%at months 12 and 24,respectively.Global Assessment Questionnaire results showed improved erection function in 97.5%ofpatients and improved ability to engage in sexual activity in 95.9%of patients at month 12;these values were 96.1%and 95.0%at month 24,respectively.The quality of sexual life score based on the Sexual Life Quality Questionnaire(SLQQ)was increased by52.2%at month 12 and by 55.3%at month 24(both P<0.001).The treatment satisfaction score determined by SLQQ(mean±standard deviation)was 62.4±21.0 at month 12 versus 65.9±20.2 at month 24.Two-year daily application of tadalafil 5mg in Chinese men with ED showed a favorable safety profile and durable improvement in sexual performance and satisfaction. 展开更多
关键词 clinical trial erectile dysfunction long-term safety once-daily dosing TADALAFIL
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Males armed with big weapons win fights at limited cost in ant-mimickingjumping spiders
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作者 Guocheng Yu Boon Hui Wong +5 位作者 Christina J.Painting Hongze Li Long Yu Zengtao Zhang Shichang Zhang Daiqin Li 《Current Zoology》 SCIE CAS CSCD 2024年第1期98-108,共11页
A core assumption of sexual selection theory is that sexually selected weapons,specialized morphological structures used directly in male con-tests,can improve an individual's reproductive success but only if the ... A core assumption of sexual selection theory is that sexually selected weapons,specialized morphological structures used directly in male con-tests,can improve an individual's reproductive success but only if the bearer can overcome associated costs,the negative effects on the bear-er's fitness components.However,recent studies have shown that producing and wielding exaggerated weapons may not necessarily be costly.Rather,some traits can be selected for supporting,or compensating for,the expense of producing and wielding such exaggerated weapons.n the ant-mimicking jumping spider Myrmarachne gisti,exaggerated chelicerae are borne only by adult males and not females,showing sexual dimorphism and steep positive allometry with body size.Here,we determine the potential benefits of bearing exaggerated chelicerae during male contests and explore the potential for costs in terms of prey-capture efficiency and compensation between chelicera size and neighboring trait size.While males with longer chelicerae won most of their male-male contests,we found no significant differences in prey-capture effi-ciency between males and females regardless of whether prey was winged or flightless.Males'elongated chelicerae thus do not impede their efficiency at capturing prey.Furthermore,we found that the sizes of all neighboring traits are positively correlated with chelicera size,suggesting that these traits may be under correlational selection.Taken together,our findings suggest that M.gisti males armed with the exaggerated chelicerae that function as weapons win more fights at limited cost for performance in prey capture and compensate for neighboring structures. 展开更多
关键词 ALLOMETRY ant-mimic COSTS elongated chelicerae threat devices trait compensations
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Restoration or Rehabilitation of the Faleme River Affected by Mining Activities: What Methods?
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作者 Mor Diop Ibrahima Mall +3 位作者 Elhadji Mamadou Sonko Tidiane Diop Birane Niane Cheikh Mbow 《Journal of Water Resource and Protection》 CAS 2024年第4期233-263,共31页
The Faleme River, a West Africa long transboundary stream (625 km) and abundant flow (>1100 million m<sup>3</sup>) is affected by severe erosion because of mining activities that takes place throughout ... The Faleme River, a West Africa long transboundary stream (625 km) and abundant flow (>1100 million m<sup>3</sup>) is affected by severe erosion because of mining activities that takes place throughout the riverbed. To preserve this important watercourse and ensure the sustainability of its services, selecting and implementing appropriates restorations techniques is vital. In this context, the purpose of this paper was to present an overview of the actions and techniques that can be implemented for the restoration/rehabilitation of the Faleme. The methodological approach includes field investigation, water sampling, literature review with cases studies and SWOT analysis of the four methods presented: river dredging, constructed wetlands, floating treatment wetlands and chemical precipitation (coagulation and flocculation). The study confirmed the pollution of the river by suspended solids (TSS > 1100 mg/L) and heavy metals such as iron, zinc, aluminium, and arsenic. For the restoration methods, it was illustrated through description of their mode of operation and through some case studies presented, that all the four methods have proven their effectiveness in treating rivers but have differences in their costs, their sustainability (detrimental to living organisms or causing a second pollution) and social acceptance. They also have weaknesses and issues that must be addressed to ensure success of rehabilitation. For the case of the Faleme river, after analysis, floating treatment wetlands are highly recommended for their low cost, good removal efficiency if the vulnerability of the raft and buoyancy to strong waves and flow is under control. 展开更多
关键词 Faleme River River Restoration Constructed Wetlands DREDGING Floating Treatment Wetlands COAGULATION-FLOCCULATION
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Thorny but rosy: prosperities and difficulties in 'AI plus medicine' concerning data collection, model construction and clinical deployment
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作者 Yujia Xia Zhangsheng Yu 《General Psychiatry》 CSCD 2024年第6期618-623,共6页
INTRODUCTION Artificial intelligence(AI)has brought about revolutionary changes in the medical field,including clinical practice,basic research and health monitoring.The powerful computing capabilities and intelligent... INTRODUCTION Artificial intelligence(AI)has brought about revolutionary changes in the medical field,including clinical practice,basic research and health monitoring.The powerful computing capabilities and intelligent algorithms enable it to process and analyse largescale medical data. 展开更多
关键词 computing concerning enable
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Integrated Machine Learning and Deep Learning Models for Cardiovascular Disease Risk Prediction: A Comprehensive Comparative Study
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作者 Shadman Mahmood Khan Pathan Sakan Binte Imran 《Journal of Intelligent Learning Systems and Applications》 2024年第1期12-22,共11页
Cardiovascular Diseases (CVDs) pose a significant global health challenge, necessitating accurate risk prediction for effective preventive measures. This comprehensive comparative study explores the performance of tra... Cardiovascular Diseases (CVDs) pose a significant global health challenge, necessitating accurate risk prediction for effective preventive measures. This comprehensive comparative study explores the performance of traditional Machine Learning (ML) and Deep Learning (DL) models in predicting CVD risk, utilizing a meticulously curated dataset derived from health records. Rigorous preprocessing, including normalization and outlier removal, enhances model robustness. Diverse ML models (Logistic Regression, Random Forest, Support Vector Machine, K-Nearest Neighbor, Decision Tree, and Gradient Boosting) are compared with a Long Short-Term Memory (LSTM) neural network for DL. Evaluation metrics include accuracy, ROC AUC, computation time, and memory usage. Results identify the Gradient Boosting Classifier and LSTM as top performers, demonstrating high accuracy and ROC AUC scores. Comparative analyses highlight model strengths and limitations, contributing valuable insights for optimizing predictive strategies. This study advances predictive analytics for cardiovascular health, with implications for personalized medicine. The findings underscore the versatility of intelligent systems in addressing health challenges, emphasizing the broader applications of ML and DL in disease identification beyond cardiovascular health. 展开更多
关键词 Cardiovascular Disease Machine Learning Deep Learning Predictive Modeling Risk Assessment Comparative Analysis Gradient Boosting LSTM
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行为安全“2-4”模型及其在煤矿安全管理中的应用 被引量:299
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作者 傅贵 殷文韬 +2 位作者 董继业 Di FAN Cherrie Jiuhua ZHU 《煤炭学报》 EI CAS CSCD 北大核心 2013年第7期1123-1129,共7页
通过观察事故统计得知,几乎100%的生产安全事故是责任事故,且是由于事故单位的"管理漏洞"所引起。理论分析得知,应用古典、近代及已有的现代事故致因链不能够精确定位"管理漏洞"的具体位置和内容,事故预防困难。根... 通过观察事故统计得知,几乎100%的生产安全事故是责任事故,且是由于事故单位的"管理漏洞"所引起。理论分析得知,应用古典、近代及已有的现代事故致因链不能够精确定位"管理漏洞"的具体位置和内容,事故预防困难。根据组织行为学原理,并研究国内外已有事故致因链发现并提出了行为安全"2-4"模型这个新型现代事故致因链。在该模型中,将事故的原因首先分解为组织行为、组织成员个人行为两个层面,然后再将组织行为继续细化分解为指导行为、运行行为,将个人行为细化分解为习惯性行为、一次性行为4个行为阶段,分别对应事故的根源、根本、间接、直接原因,具体内容分别是安全文化,安全管理体系,安全知识、意识和习惯,不安全动作和不安全状态。煤矿事故案例分析证实,应用该模型,且把"安全管理"表达为"行为控制"之后,可以将导致事故发生的关键原因"管理漏洞"、"管理缺欠"理解为"行为控制缺欠",并可将其精确定位在"2"个层面、"4"个行为阶段的其中一个或几个上面,据此即可制定有效、明确的事故预防措施。 展开更多
关键词 行为安全模型 事故原因 管理漏洞 准确定位 煤矿事故
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AZ91 Mg-Al合金中β-(Mg_(17)Al_(12))析出相的形态及其晶体学特征 被引量:60
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作者 肖晓玲 罗承萍 +1 位作者 聂建峰 B.C.Muddle 《金属学报》 SCIE EI CAS CSCD 北大核心 2001年第1期1-7,共7页
应用透射电镜研究了时效AZ91 Mg-Al合金连续析出相的显微组织形态及晶体学特征。发现四种不同形态和晶体学特征的β-(Mg17Al12)析出相,其中占绝大多数的是板条状析出相沿基面(0001)α析出的板条析出相与基... 应用透射电镜研究了时效AZ91 Mg-Al合金连续析出相的显微组织形态及晶体学特征。发现四种不同形态和晶体学特征的β-(Mg17Al12)析出相,其中占绝大多数的是板条状析出相沿基面(0001)α析出的板条析出相与基体保持Burgers位向关系,生长方向为[7, 2,9,0];其晶体学特征与由不变线应变原理预测的完全一致。第二类析出相是以其轴线与基面垂直的六棱柱体,六个棱柱面都是{1100}α//{110}β,与基体保持对称性好的Crawley位向关系。另有少量短棒状析出相与基体保持Porter位向关系。实验中还观察到一种未见报道过的位向关系。讨论了形成不同形态和晶体学特征的机制。 展开更多
关键词 AZ91MG-AL合金 β-(MG17AL12)析出相 透射电镜分析 晶体学特征 镁合金
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血管内皮生长因子和表皮生长因子信号通路的联合抑制在非小细胞肺癌治疗中的应用 被引量:27
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作者 南娟 刘谦 +3 位作者 丁燕 张占雀 Allen C.Gao 周清华 《中国肺癌杂志》 CAS 2009年第12期1316-1324,共9页
肺癌是全球癌症相关死亡的首位原因,已成为人类面临的日益严重的公共卫生问题,各国政府均投入了大量的人力物力,以期在肺癌研究领域有所突破。大约50%新诊断的肺癌已属晚期,对于这些患者可采用姑息性系统治疗法。系统化疗是目前治疗非... 肺癌是全球癌症相关死亡的首位原因,已成为人类面临的日益严重的公共卫生问题,各国政府均投入了大量的人力物力,以期在肺癌研究领域有所突破。大约50%新诊断的肺癌已属晚期,对于这些患者可采用姑息性系统治疗法。系统化疗是目前治疗非小细胞肺癌(non—small cell lung cancer,NSCLC)的主要措施。许多基于顺铂的联合方案和单药疗法常用于晚期NSCLC患者不同阶段的治疗。 展开更多
关键词 非小细胞肺癌 血管内皮生长因子 表皮生长因子 治疗法 联合抑制 信号通路 公共卫生问题 cell
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基于NDVI数据的黄河流域地表植被覆盖综合分类研究 被引量:17
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作者 李道峰 田英 郝芳华 《水土保持研究》 CSCD 2003年第4期88-91,共4页
在地理信息系统支持下,文章以时间分辨率为植物一个完整生长周期、空间分辨率1km×1km的NOAA/AVHRR遥感影像的NDVI指标为数据源,采用目前较为流行的主成分变换法,结合气象资料和数字高程模型(DEM),参考相关的地理基础图件,对黄河流... 在地理信息系统支持下,文章以时间分辨率为植物一个完整生长周期、空间分辨率1km×1km的NOAA/AVHRR遥感影像的NDVI指标为数据源,采用目前较为流行的主成分变换法,结合气象资料和数字高程模型(DEM),参考相关的地理基础图件,对黄河流域地表植被覆盖的进行综合分类。与传统对单一NOAA/AVHRR图像NDVI数据进行分类的方法相比,综合分类方法获得了较高的分类精度,取得了较好的效果。 展开更多
关键词 黄河流域 地表植被覆盖 NDVI 主成分变换
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迭代法ECT对循环流化床底部固体浓度的测量 被引量:2
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作者 刘石 许华 +2 位作者 王海刚 姜凡 杨五强 《工程热物理学报》 EI CAS CSCD 北大核心 2002年第6期757-760,共4页
在矩形循环流化床底部固体浓度的测量中首次采用了迭代电容层析成象方法,比通用的线性逆映射方法明显提高了成象质量。通过层析成象分析得到了床层中固体浓度分布、平均固体浓度随时间的变化和频谱特性。
关键词 ECT 循环流化床 底部固体浓度 测量 电容层析成像 迭代成象法
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青少年及儿童近视进展及其危险因素 被引量:12
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作者 林仲 梁远波 +2 位作者 李晓霞 Balamurali Vasudevan Kenneth J Ciuffreda 《中华实验眼科杂志》 CAS CSCD 北大核心 2015年第12期1148-1152,共5页
近视是全球重要的公共卫生问题。青少年及儿童近视患病率因在全球范围,尤其在亚洲地区,快速增长且影响因素复杂多样而受到广泛关注。尽管目前已有大量关于青少年及儿童近视进展及其危险因素的报道,然而由于人群、近视定义、睫状肌麻... 近视是全球重要的公共卫生问题。青少年及儿童近视患病率因在全球范围,尤其在亚洲地区,快速增长且影响因素复杂多样而受到广泛关注。尽管目前已有大量关于青少年及儿童近视进展及其危险因素的报道,然而由于人群、近视定义、睫状肌麻痹剂、验光方法等不同导致彼此间难以比较。本文就1990年至今关于青少年(〈18岁)和儿童近视进展及其与年龄、性别、屈光状态、近距工作、户外活动、父母近视或父母生育年龄等危险因素关系的报道进行总结。 展开更多
关键词 近视 进展 危险因素
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我国能源供给与消费优化精准配置探讨——以浅层地热能与建筑物供暖制冷配置为例 被引量:8
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作者 武强 涂坤 +3 位作者 徐生恒 曾一凡 刘守强 朱柯 《中国能源》 2020年第5期4-7,19,共5页
当前我国面临着资源约束矛盾突出、能源利用效率低和应对气候变化等问题。要圆满解决这些矛盾和问题,不仅需要能源消费侧和供给侧的革命,而且消费侧与供给侧之间能源如何优化精准配置也同样十分重要。本文系统地阐述了能源供给与消费优... 当前我国面临着资源约束矛盾突出、能源利用效率低和应对气候变化等问题。要圆满解决这些矛盾和问题,不仅需要能源消费侧和供给侧的革命,而且消费侧与供给侧之间能源如何优化精准配置也同样十分重要。本文系统地阐述了能源供给与消费优化精准配置的原理和内涵;以建筑物供暖与制冷能源需求为例,科学地分析了浅层地热能为建筑物供暖制冷在品位上、空间上和时间上配置的合理性。在新时代推进能源生产和消费革命的背景下,开展我国能源供给与消费优化精准配置研究,对更好地积极应对能源、环境与经济带来的挑战具有战略性意义,对提高我国能源利用效率有重要现实意义。 展开更多
关键词 能源供给 消费优化 精准配置 浅层地热能
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素食人群尿液^1H NMR代谢轮廓的多因素方差分析 被引量:4
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作者 董继扬 邓伶莉 +2 位作者 CHENG Kian-Kai GRIFFI NJulian L. 陈忠 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2011年第12期2769-2776,共8页
结合方差分析(ANOVA)和偏最小二乘法判别分析(PLS-DA)两种分析技术,对素食和普食人群的尿液1H NMR谱进行分析.利用ANOVA方法将数据矩阵分解为几个独立因素矩阵,滤除干扰因素后,再利用PLS-DA对单因素数据进行建模分析.实验结果表明,ANOVA... 结合方差分析(ANOVA)和偏最小二乘法判别分析(PLS-DA)两种分析技术,对素食和普食人群的尿液1H NMR谱进行分析.利用ANOVA方法将数据矩阵分解为几个独立因素矩阵,滤除干扰因素后,再利用PLS-DA对单因素数据进行建模分析.实验结果表明,ANOVA/PLS-DA方法可以有效地减少饮食因素和性别因素之间的相互影响,使分析结果更具有生物学意义. 展开更多
关键词 多因素分析 方差分析 偏最小二乘法判别分析 核磁共振代谢组学
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