检索结果-南通市图书馆

Denoising Stochastic Progressive Photon Mapping Renderings Using a Multi-Residual Network

在线全文

学校读者我要写书评

暂无评论

Journal of Computer Science & Technology 2020年第3期35卷 506-521页

作者： Zheng Zeng Lu Wang Bei-Bei Wang Chun-meng kang Yan-Ning Xu School of Software Shandong UniversityJinan 250101China School of Computer Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Information Science and Engineering Shandong Normal UniversityJinan 250358China

Stochastic progressive photon mapping(SPPM)is one of the important global illumination methods in computer *** can simulate caustics and specular-diffuse-specular lighting effects ***,as a biased method,it always suffers from both bias and variance with limited iterations,and the bias and the variance bring multi-scale noises into SPPM *** learning-based methods have shown great advantages on denoising unbiased Monte Carlo(MC)methods,but have not been leveraged for biased *** this paper,we present the first learning-based method specially designed for denoising-biased SPPM ***,to avoid conflicting denoising constraints,the radiance of final images is decomposed into two components:caustic and *** two components are then denoised separately via a two-network *** each network,we employ a novel multi-residual block with two sizes of filters,which significantly improves the model’s capabilities,and makes it more suitable for multi-scale noises on both low-frequency and high-frequency *** also present a series of photon-related auxiliary features,to better handle noises while preserving illumination details,especially *** with other state-of-the-art learning-based denoising methods that we apply to this problem,our method shows a higher denoising quality,which could efficiently denoise multi-scale noises while keeping sharp illuminations.

关键词： denoising stochastic progressive photon mapping(SPPM) deep learning residual neural network

Enhanced Photocatalytic CO_(2) Reduction via Linkage Substitution in Porphyrinic Covalent Organic Frameworks

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第7期6卷 1689-1697页

作者： Suleman Suleman kang Sun Yiming Zhao Xinyu Guan Zhongyuan Lin Zheng meng Hai-Long Jiang Department of Chemistry University of Science and Technology of ChinaHefeiAnhui 230026

A catalytic performance is greatly impacted by the microenvironment surrounding the catalytic ***,efforts to modify the microenvironment are primarily directed towards the first coordination spheres,while controlling the secondary coordination spheres is entirely *** this work,a series of porphyrin-based covalent organic frameworks(COFs)with distinct linkage were rationally designed to investigate the structure-property relationship between the secondary coordination spheres of catalytic centers and CO_(2) *** secondary coordination spheres of COFs could be changed readily by manipulating the organic *** photocatalytic CO_(2) reduction,the COF withβ-ketoenamine as the linkage(NiPor-BDOB)exhibited superior activity,selectivity,and stability over its imine-linked counterpart(NiPor-BDA).Experiments and theoretical calculations indicated that the distinct secondary coordination sphere resulted in an electronic density change of Ni centers,leading to enhanced photocatalytic *** study highlights the significance of controlling the secondary coordination sphere around the active site.

关键词： covalent organic frameworks linkage substitution photocatalysis CO_(2)reduction activity selectivity

Potential industrial applications of photo/electrocatalysis: Recent progress and future challenges

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2024年第5期9卷 859-876页

作者： Jinhao Li Jing Ren Shaoquan Li Guangchao Li Molly meng-Jung Li Rengui Li Young Soo kang Xiaoxin Zou Yong Luo Bin Liu Yufei Zhao State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China Quzhou Institute for Innovation in Resource Chemical Engineering Quzhou324000China State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing100029China Department of Applied Physics The Hong Kong Polytechnic UniversityHong Kong999077China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian National Laboratory for Clean EnergyZhongshan Road 457Dalian116023China Environmental and Climate Technology Track of Korea Institute of Energy Korea Institute of Energy TechnologyNaju-siJeollanam do58217Republic of Korea State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun130012China

Nowadays,the rapid development of the social economy inevitably leads to global energy and environmental *** this reason,more and more scholars focus on the development of photocatalysis and/or electrocatalysis technology for the advantage in the sustainable production of high-value-added products,and the high efﬁciency in pollutants *** there is plenty of outstanding research has been put forward continuously,most of them focuses on catalysis performance and reaction mechanisms in laboratory *** industrial application of photo/electrocatalytic processes is still a challenge that needs to be overcome by social *** this regard,this review comprehensively summarized several explorations in theﬁeld of photo/electrocatalytic reduction towards potential industrial applications in recent *** attention is paid to the successful attempts and the current status of photo/electrocatalytic water splitting,carbon dioxide conversion,resource utilization from waste,etc.,by using advanced *** key problems and challenges of photo/electrocatalysis in future industrial practice are also discussed,and the possible development directions are also pointed out from the industry view.

关键词： Photocatalysis Electrocatalysis Industrial applications H2 economy

在线全文

学校读者我要写书评

暂无评论

二氢杨梅素肝脏疾病保护作用及机制研究进展

中南药学 2024年第5期22卷 1300-1304页

作者：康萌李雪梅万静之李澳忠刘启玲李影娜秦绪军陕西中医药大学公共卫生学院陕西咸阳712046 珠海高新技术产业开发区人民医院广东珠海519085 西北工业大学生命学院西安710072

二氢杨梅素是一种主要存在于葡萄科蛇葡萄属植物中的黄酮类化合物,具有抗氧化、抗炎、抗肿瘤、抗病原微生物、抗衰老、解酒保肝、防治心脑血管及代谢性疾病等多种药理学作用。近年来,二氢杨梅素对肝脏疾病包括急性肝损伤、酒精性肝病... 详细信息

二氢杨梅素是一种主要存在于葡萄科蛇葡萄属植物中的黄酮类化合物,具有抗氧化、抗炎、抗肿瘤、抗病原微生物、抗衰老、解酒保肝、防治心脑血管及代谢性疾病等多种药理学作用。近年来,二氢杨梅素对肝脏疾病包括急性肝损伤、酒精性肝病、代谢功能障碍相关的脂肪变性肝病、病毒性肝炎、肝纤维化以及肝癌等的保护作用得到了大量的研究和报道。本文对二氢杨梅素对肝脏疾病的保护作用及机制进行综述,以期为二氢杨梅素相关药物研发及临床防治肝脏疾病提供参考。

关键词：二氢杨梅素抗氧化氧化应激药理作用

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

基于局部条件区分能力的高效属性约简算法

计算机应用 2022年第2期42卷 449-456页

作者：康猛蒙祖强广西大学计算机与电子信息学院广西南宁530004

基于区分矩阵的传统属性约简方法具有直观易理解的优点,但时间和空间复杂度都很高,当数据规模较大或条件属性较多时,会无法快速得到约简结果。为解决该问题,在区分关系的基础上构造了条件区分能力来进行属性选择,提出一种基于条件区分... 详细信息

基于区分矩阵的传统属性约简方法具有直观易理解的优点,但时间和空间复杂度都很高,当数据规模较大或条件属性较多时,会无法快速得到约简结果。为解决该问题,在区分关系的基础上构造了条件区分能力来进行属性选择,提出一种基于条件区分能力的属性约简算法。而为了进一步加快属性重要性的计算、提高约简效率,依据大数定律中频率的稳定性,通过采样的方式将条件区分能力扩展为局部条件区分能力,提出基于局部条件区分能力的属性约简算法。理论证明了条件区分能力在属性的选择上比正区域更严格,并将该算法与基于区分度的高效前向属性约简算法(FAR-DV)、基于k近邻属性重要度和相关系数的属性约简算法(K2NCRS)及基于正区域排序升序决策表的快速正区域约简算法(FPRA)进行了对比。实验结果显示,该算法在属性选择顺序、约简率和分类精度上与FARDV基本一致,在约简效率上比上述三种算法提高了10倍以上;且随着数据规模的增大或条件属性的增多,在约简效率上的提升越明显。可以看出,所提算法具有更低的时空复杂度,适用于海量数据属性约简。

关键词：属性约简区分矩阵区分能力条件区分能力大数定律局部条件区分能力

我国南方不同地区寒武系页岩含气性差异主控因素探讨

在线全文

学校读者我要写书评

暂无评论

地学前缘 2023年第3期30卷 1-13页

作者：张同伟罗欢孟康 Bureau of Economic Geology Jackson School of GeosciencesThe University of Texas at AustinAustin TX 78713USA 兰州大学地质科学与矿产资源学院/甘肃省西部矿产资源重点实验室甘肃兰州730000 西北大学地质学系大陆动力学国家重点实验室陕西西安710069

中国南方寒武系富有机质页岩具有很大的页岩气资源潜力,但不同地区的勘探效果差异较大。本文分析了近年来我国寒武系页岩含气性研究进展,讨论了寒武系页岩的储层特征、总有机碳(TOC)含量、孔隙度和构造保存条件等因素对页岩含气性的影... 详细信息

中国南方寒武系富有机质页岩具有很大的页岩气资源潜力,但不同地区的勘探效果差异较大。本文分析了近年来我国寒武系页岩含气性研究进展,讨论了寒武系页岩的储层特征、总有机碳(TOC)含量、孔隙度和构造保存条件等因素对页岩含气性的影响。中上扬子地区的寒武系富有机质页岩主要发育在绵阳—长宁裂陷槽、鄂西裂陷槽和湘黔渝深水陆棚—斜坡等沉积相区。寒武系页岩的孔隙度主要分布在1%~6%,孔隙以微孔和介孔占主导,总体以孤立密集发育的海绵状有机孔为主,区别于志留系龙马溪组页岩极为发育的气泡状有机孔。位于裂陷槽环境的寒武系筇竹寺组/水井沱组页岩的有机孔隙发育程度较好(有机质平均面孔率可达20%~50%),且无机孔也对总孔隙度有所贡献;页岩现今含气量为1.5~5.5 m^(3)/t,是理论总生成气量的10%~30%(最大甚至超过50%),反映页岩气保存条件总体较好。而位于深水陆棚—斜坡环境的寒武系牛蹄塘组页岩有机孔发育程度较差(有机质平均面孔率小于20%),页岩现今含气量基本小于1.0 m^(3)/t,不足理论总生成气量的10%,反映页岩气可能发生过大规模散失,页岩气保存条件较差。中上扬子地区寒武系富有机质页岩底部通常存在区域性的不整合面,在沉积之后也普遍经历过强烈的后期构造抬升作用,均可能造成油气的散失。相比之下,绵阳—长宁裂陷槽和鄂西裂陷槽环境下的寒武系页岩孔隙发育情况和构造保存条件相对较好,富有机质层段内发育的钙质页岩/泥灰岩夹层可能会限制油气在垂向上的运移和散失,为寒武系页岩气的保存创造了有利条件,应是寒武系页岩气勘探的重点目标,这也与我国目前的寒武系页岩气勘探实际相对应。

关键词：页岩气含气性寒武系有机孔构造保存条件中国南方

在线全文

学校读者我要写书评

暂无评论

中国特色社会主义政治经济学的逻辑起点

马克思主义与现实 2023年第2期 111-120页

作者：谢富胜康萌中国人民大学全国中国特色社会主义政治经济学研究中心中国人民大学经济学院

逻辑起点作为理论体系中最基础最关键的部分,它的确立也是首要难点。学术界对中国特色社会主义政治经济学的逻辑起点问题一直争论不休,未有定论。本文对关于中国特色社会主义政治经济学逻辑起点的不同观点进行了辨析,系统梳理了黑格尔... 详细信息

逻辑起点作为理论体系中最基础最关键的部分,它的确立也是首要难点。学术界对中国特色社会主义政治经济学的逻辑起点问题一直争论不休,未有定论。本文对关于中国特色社会主义政治经济学逻辑起点的不同观点进行了辨析,系统梳理了黑格尔和马克思关于“逻辑起点”的理论思想和确立方法,认为作为起点的范畴应具备简单、直接、抽象的性质,同时在运动过程中应具有中介性。为避免陷入黑格尔唯心主义纯粹的概念推演,确保抽象法的科学性,逻辑起点的确立过程还要注意研究方法和叙述方法的联系与区别,正确把握历史和逻辑的辩证关系。在以上方法论的指导下,本文提出,中国特色社会主义政治经济学的逻辑起点仍是商品,商品生产和交换的内在价值规律外在表现为竞争规律,促使企业生产方式变革,并在经济循环中形成广泛的社会关系,表现为各种经济范畴,从而具有内在联系的中国特色社会主义理论体系以商品为起点得以构建,具有自身的特殊性。

关键词：中国特色社会主义理论体系逻辑起点商品

Clean-DM1, a Korean Polyherbal Formula, Improves High Fat Diet-Induced Diabetic Symptoms in Mice by Regulating IRS/PI3K/AKT and AMPK Expressionsin Pancreas and Liver Tissues

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2024年第2期30卷 125-134页

作者： Piao Wang Yi Liu Seok Yong kang Chenzi Lyu Xiang Han Tianjun Ho Kyung Jae Lee Xianglong meng Yong-Ki Park Hyo Won Jung Department of Herbology College of Korean MedicineDongguk UniversityGyeongju 38066Korea College of Pharmacy&Graduate School of Pharmaceutical Sciences Ewha Womans UniversitySeoul 03760Korea Korean Medicine R&D Center Dongguk UniversityGyeongju 38066Korea Shanxi Key Laboratory of Traditional Herbal Medicines Processing Shanxi University of Chinese MedicineJinzhong(030619)ShanxiProvinceChina

Objective:To investigate the effects of Clean-DM1(C-DM1),a polyherbal formulation of Radix Scrophulariae,Radix Astragali,Rhizoma Atractylodis,and Radix Salviae Miltiorrhizae,on high-fat diet(HFD)-induced diabetes ***:The information about active components of C-DM1 extract and molecular mechanism was obtained from network pharmacology *** compounds of C-DM1 extract by high performance liquid chromatography-mass spectrometry(HPLC-MS)analysis were conducted for quality *** in vivo study,mice were induced diabetes by HFD for 12 *** mice in the normal group(Nor)were maintained with a regular diet and treated with saline by *** HFD model mice were randomly divided into 3 groups,including a HFD diabetic model group,a C-DM1 extract-administered group(C-DM1,500 mg/kg),and metformin-administered groups(Met,500 mg/kg),8 mice in each *** intake,body weight(BW),and fasting blood glucose(FBG)levels were recorded weekly for 4 *** 4 weeks of treatment,alanine aminotransferase(ALT),aspartate aminotransferase(AST),blood glucose,low-density lipoprotein cholesterol(LDL-C)were determined using an automated clinical chemistry analyzer,and homeostatic model for assessing insulin resistance(HOMA-IR)levels and oral glucose tolerance test(OGTT)were *** histopathological changes of liver and pancreatic tissues were observed by hematoxylin-eosin *** receptor substrate(IRS)/phosphatidylinositol 3 kinase(PI3K)/protein kinase B(AKT)and adenosine 5'-monophosphate-activated protein kinase(AMPK)expressions in liver and pancreas tissues were detected by Western blot ***:HPLC-MS identified dihydroisotanshinone,dihydroisotanshinone I,cryptotanshinone,harpagoside,and atractyloside A in C-DM1 *** administration of C-DM1 extract significantly decreased body weight,calorie intake,and the levels of blood glucose and insulin in the diabetic mice(P<0.05 or P<0.01).The C-DM1 extract administration improved the im

关键词： high-fat diet type 2 diabetes mellitus herbal formulation insulin receptor substrate/phosphatidylinositol 3 kinase/protein kinase B adenosine 5'-monophosphate-activated protein kinase network pharmacology high performance liquid chromatography-mass spectrometry analysis

Design,synthesis,and biological evaluation of benzo[4,5]thieno[2,3-d]pyrimidine derivatives as novel HIV-1 NNRTIs

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第6期35卷 344-348页

作者： Bairu meng Zongji Zhuo Han Yu Sining Tao Zixuan Chen Erik De Clercq Christophe Pannecouque Dongwei kang Peng Zhan Xinyong Liu Department of Medicinal Chemistry Key Laboratory of Chemical Biology(Ministry of Education)School of Pharmaceutical SciencesCheeloo College of MedicineShandong UniversityJi’nan 250012China Laboratory of Virology and Chemotherapy Rega Institute for Medical ResearchK.U.LeuvenLeuven B-3000Belgium China-Belgium Collaborative Research Center for Innovative Antiviral Drugs of Shandong Province Ji’nan 250012China

Inspired by our previous studies to discover novel human immunodeficiency virus-1(HIV-1)nonnucleoside reverse transcriptase inhibitors(NNRTIs)by targeting the tolerant region II of the NNRTIs binding pocket(NNIBP),a series of novel benzo[4,5]thieno[2,3-d]pyrimidine derivatives were designed through structure-based drug design as novel potent HIV-1 *** results showed that compound16b was the most active inhibitor,exhibiting 50% effective concentration(EC50)values from 0.021μmol/L to 0.298μmol/L against wild-type(WT)and a panel of NNRTIs-resistant HIV-1 ***,16b was demonstrated with a significantly low 50% cytotoxicity concentration(CC_(50))value(>200μmol/L)and high selectivity index(SI)*** addition,16b yielded moderate reverse transcriptase(RT)enzyme inhibition with a 50% inhibition concentration(IC_(50))value of 0.183μmol/L,which demonstrated that it acted as HIV-1 *** binding mode of 16b with RT was also illustrated via molecular ***,this work provided a novel lead compound for developing potent HIV-1 NNRTIs.

关键词： HIV-1 NNRTIs DAPYs Tolerant regionⅡ Drug design