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Precursor engineering enables high-performance all-inorganic CsPbIBr_(2) perovskite solar cells with a record efficiency approaching 13%

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Journal of Energy Chemistry 2024年第3期90卷 16-22,I0003页

作者： Qingyan Chang Yidan An Huaiman Cao Yuzhen Pan Liangyu Zhao Yulong Chen Yi We Sai-Wing Tsang hin-Lap Yip Licheng Sun Ze Yu State Key Laboratory of Fine Chemicals Dalian University of Technology(DUT)Dalian 116024LiaoningChina Department of materials Science and Engineering City University of Hong KongKowloon 999077Hong KongChina School of Chemistry Dalian University of Technology(DUT)Dalian 116024LiaoningChina Key Laboratory of materials Modification by Laser Ionand Electron Beams(Ministry of Education)Dalian University of Technology(DUT)Dalian 116024LiaoningChina School of Energy and Environment City University of Hong KongKowloon 999077Hong KongChina Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry School of ScienceWestlake UniversityHangzhou 310024ZhejiangChina Department of Chemistry School of Engineering Sciences in ChemistryBiotechnology and HealthKTH Royal Institute of Technology10044 StockholmSweden

All-inorganic CsPbIBr_(2) perovskite has attracted widespread attention in photovoltaic and other optoelectronic devices because of its superior thermal ***,the deposition of high-quality solutionprocessed CsPbIBr_(2) perovskite films with large thicknesses remains ***,we develop a triple-component precursor(TCP) by employing lead bromide,lead iodide,and cesium bromide,to replace the most commonly used double-component precursor(DCP) consisting of lead bromide and cesium ***,the TCP system significantly increases the solution concentration to 1.3 M,leading to a larger film thickness(~390 nm) and enhanced light *** resultant CsPbIBr_(2) films were evaluated in planar n-i-p structured solar cells,which exhibit a considerably higher optimal photocurrent density of 11.50 ma cm^(-2) in comparison to that of DCP-based devices(10.69 ma cm^(-2)).By adopting an organic surface passivator,the maximum device efficiency using TCP is further boosted to a record efficiency of 12.8% for CsPbIBr_(2) perovskite solar cells.

关键词： All-inorganic perovskite solar cells CsPbIBr_(2) Precursor engineering Solubility High performance

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Incorporating metapath interaction on heterogeneous information network for social recommendation

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Frontiers of Computer Science 2024年第1期18卷 33-48页

作者： Yanbin JIANG Huifang ma Xiaohui ZHANG Zhixin LI Liang CHANG College of Computer Science and Engineering Northwest Normal UniversityLanzhou 730070China Guangxi Key Lab of Multi-source Information Mining and Security Guangxi Normal UniversityGuilin 541001China Guangxi Key Laboratory of Trusted Software Guilin University of Electronic TechnologyGuilin 541004China

Heterogeneous information network(hin)has recently been widely adopted to describe complex graph structure in recommendation systems,proving its effectiveness in modeling complex graph *** existing hin-based recommendation studies have achieved great success by performing message propagation between connected nodes on the defined metapaths,they have the following major *** works mainly convert heterogeneous graphs into homogeneous graphs via defining metapaths,which are not expressive enough to capture more complicated dependency relationships involved on the ***,the heterogeneous information is more likely to be provided by item attributes while social relations between users are not adequately *** tackle these limitations,we propose a novel social recommendation model MPISR,which models MetaPath Interaction for Social Recommendation on heterogeneous information ***,our model first learns the initial node representation through a pretraining module,and then identifies potential social friends and item relations based on their similarity to construct a unified *** then develop the two-way encoder module with similarity encoder and instance encoder to capture the similarity collaborative signals and relational dependency on different *** experiments on five real datasets demonstrate the effectiveness of our method.

关键词： heterogeneous information network social reco-mmender system metapath interaction attention mechanism

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SMEC:Scene Mining for E-Commerce

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Journal of Computer Science & Technology 2024年第1期39卷 192-210页

作者：王罡李翔郭子义殷大伟马帅 State Key Laboratory of Software Development Environment Beihang UniversityBeijing 100191China School of Data Science and Engineering East China Normal UniversityShanghai 200062China *** Inc.Beijing 100176China Baidu Inc.Beijing 100085China

Scene-based recommendation has proven its usefulness in E-commerce,by recommending commodities based on a given ***,scenes are typically unknown in advance,which necessitates scene discovery for *** this article,we study scene discovery for E-commerce *** first formalize a scene as a set of commodity cate-gories that occur simultaneously and frequently in real-world situations,and model an E-commerce platform as a heteroge-neous information network(hin),whose nodes and links represent different types of objects and different types of rela-tionships between objects,*** then formulate the scene mining problem for E-commerce as an unsupervised learning problem that finds the overlapping clusters of commodity categories in the *** solve the problem,we pro-pose a non-negative matrix factorization based method SMEC(Scene Mining for E-Commerce),and theoretically prove its *** six real-world E-commerce datasets,we finally conduct an extensive experimental study to evaluate SMEC against 13 other methods,and show that SMEC consistently outperforms its competitors with regard to various evaluation measures.

关键词： graph clustering E-commerce heterogeneous information network(hin) scene mining

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Effect of Cr and Co Promoters Addition on Vanadium Phosphate Catalysts for Mild Oxidation of n-Butane

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Journal of Natural Gas Chemistry 2006年第2期15卷 144-148页

作者： Yun hin Taufiq-Yap Putra Laboratory for Catalysis and Technology Department of ChemistryFaculty of ScienceUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia

In this study, Cr and Co promoted, as well as unpromoted vanadium phosphate （VPO） catalysts were synthesized by the reaction of V2O5 and o-H3PO4 in organic medium followed by calcination in n-butane/air environment at 673 K. The physico-chemical properties and the catalytic behavior were affected by the addition of Cr and Co dopants. H2-TPR was used to investigate the nature of oxidants in the unpromoted and promoted catalysts. The results showed that both the Cr and Co promoters remarkably lowered the temperature of the reduction peak associated with V^5＋. The amount of oxygen species originated from the active phase, V^4＋, removed was significantly increased for Co and Cr-promoted catalysts. Both Cr and Co dopants improve strongly the n-butane conversion without sacrificing the ma selectivity. A good correlation was observed between the amount of oxygen species removed from V^4＋ phase and the activity for n-butane oxidation to maleic anhydride. This suggested that V^4＋-O was the center for the activation of n-butane.

关键词： n-butane oxidation VPO promoter maleic anhydride TPR

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结肠癌患者血清suPAR和GRP78水平与肠道菌群失调的相关性研究

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中国微生态学杂志 2024年第5期36卷 589-593页

作者：丁思洁马粤云马佳颖丽水市人民医院肿瘤放化疗科浙江丽水323050 上海市第一人民医院放疗科丽水市人民医院放射物理室

目的探讨可溶性尿激酶型纤溶酶原激活物受体(suPAR)和葡萄糖调节蛋白78(GRP78)在结肠癌患者血清中的表达及其与肠道菌群失调的相关性。方法选取我院2020年5月至2023年5月接收的116例结肠癌患者作为结肠癌组,另选同期健康体检者114例作... 详细信息

目的探讨可溶性尿激酶型纤溶酶原激活物受体(suPAR)和葡萄糖调节蛋白78(GRP78)在结肠癌患者血清中的表达及其与肠道菌群失调的相关性。方法选取我院2020年5月至2023年5月接收的116例结肠癌患者作为结肠癌组,另选同期健康体检者114例作为对照组,采用ELISA法检测两组血清suPAR和GRP78水平。采集两组新鲜粪便进行革兰氏染色,根据镜下菌群数量将疾病组分为菌群正常组(n=41)、菌群失调Ⅰ度组(n=30)、菌群失调Ⅱ度组(n=24)、菌群失调Ⅲ度组(n=21)。比较各组血清suPAR、GRP78水平和肠球菌、双歧杆菌、乳杆菌数量,分析血清suPAR、GRP78水平与肠道菌群的相关性。结果结肠癌组血清suPAR和GRP78水平明显高于对照组(P<0.001),患者肠道失调情况越严重,血清suPAR、GRP78水平越高(P<0.001);结肠癌组肠球菌数量较对照组多,双歧杆菌和乳杆菌数量较对照组少(P<0.001),患者肠道失调情况越严重,双歧杆菌和乳杆菌数量越少,肠球菌数量越多(P<0.001);Pearson相关性分析显示,血清suPAR(r=0.830,P<0.001)、GRP78(r=0.766,P<0.001)水平与肠球菌数量呈正相关,与双歧杆菌(r=−0.799,P<0.001;r=−0.780,P<0.001)、乳杆菌(r=−0.792,P<0.001;r=−0.712,P<0.001)数量呈负相关。结论结肠癌患者血清suPAR和GRP78水平增加,可能与肠道菌群和其失调程度有关。

关键词：可溶性尿激酶型纤溶酶原激活物受体葡萄糖调节蛋白78 结肠癌肠道菌群失调

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红托竹荪菌丝体多糖饮料的制备及其对小鼠运动耐力的影响

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保鲜与加工 2024年第5期24卷 91-97页

作者：马丽孟晨西新疆巴音郭楞职业技术学院新疆库尔勒841000 新疆第二医科大学新疆克拉玛依834000

为研制红托竹荪菌丝体多糖饮料,采用单因素和正交试验优化饮料组分的最佳配比,并考察其对小鼠运动耐力的影响。结果表明,红托竹荪菌丝体多糖饮料的最佳配方为:红托竹荪菌丝体多糖添加量10%,蔗糖添加量3%,柠檬酸添加量0.06%,羧甲基纤维... 详细信息

为研制红托竹荪菌丝体多糖饮料,采用单因素和正交试验优化饮料组分的最佳配比,并考察其对小鼠运动耐力的影响。结果表明,红托竹荪菌丝体多糖饮料的最佳配方为:红托竹荪菌丝体多糖添加量10%,蔗糖添加量3%,柠檬酸添加量0.06%,羧甲基纤维素钠添加量0.8%,采用该配方制得的饮料感官评分为(86.2±1.7)分。运动耐力实验结果表明,与空白对照组相比较,红托竹荪菌丝体多糖饮料(中、高剂量)能够明显延长小鼠的爬杆时间与游泳力竭时间,并显著降低运动后血清中乳酸与尿素氮的含量,表明该饮料有助于提高机体的运动耐力,从而可为相关运动食品的开发提供参考。

关键词：红托竹荪菌丝体多糖饮料配方运动耐力

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Nationwide retrospective study of hepatitis B virological response and liver stiffness improvement in 465 patients on nucleos(t)ide analogue

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World Journal of Gastroenterology 2022年第31期28卷 4390-4398页

作者： Alnoor Ramji Karen Doucette Curtis Cooper Gerald Yosel Minuk mang ma Alexander Wong David Wong Edward Tam Brian Conway David Truong Philip Wong Lisa Barrett hin hin Ko Sarah Haylock-Jacobs Nishi Patel Gilaad G Kaplan Scott Fung Carla S Coffin Department of Medicine University of British ColumbiaVancouver v6t 1z3Canada Department of Medicine University of AlbertaEdmonton t6g 2r7Canada Department of Medicine The Ottawa Hospital Research InstituteUniversity of OttawaOttawa ON K1H 8L6Canada Department of Medicine University of ManitobaWinnipeg r3e 3j7Canada Department of Medicine University of SaskatchewanSaskatoon s7n 5e5Canada Department of Medicine University Health NetworkToronto m5g 2c4Canada Pacific Gastroenterology Associates Vancouver v6z 2k5Canada Vancouver Infectious Disease Centre Vancouver v6z 2c7Canada Department of Medicine McGill UniversityMontreal h3a 0g4Canada Department of Microbiology and Immunology Dalhousie UniversityHalifax b3h 4r2Canada Cumming School of Medicine University of CalgaryCalgary t2n 1n4Canada

BACKGROUND Hepatitis B virus(HBV)nucleos(t)ide analog(NA)therapy reduces liver disease but requires prolonged therapy to achieve hepatitis B surface antigen(HBsAg)*** is limited North American real-world data using non-invasive tools for fibrosis assessment and few have compared 1st generation NA or lamivudine(LAM)to tenofovir disoproxil fumarate(TDF).AIM To assess impact of NA on virological response and fibrosis regression using liver stiffness measurement(LSM)(i.e.,FibroScan®).METHODS Retrospective,observational cohort study from the Canadian HBV *** collected included demographics,NA,HBV DNA,alanine aminotransferase(ALT),and *** were HBV monoinfected patients,treatment naïve,and received 1 NA with minimum 1 year *** In 465(median 49 years,37%female,35%hepatitis B e antigen+at baseline,84%Asian,6%White,and 9%Black).Percentage of 64(n=299)received TDF and 166 were LAM-treated with similar median duration of 3.9 and 3.7 years,*** mean baseline LSM was 11.2 kPa(TDF)vs 8.3 kPa(LAM)(P=0.003).At 5-year follow-up,the mean LSM was 7.0 kPa in TDF vs 6.7 kPa in LAM(P=0.83).There was a significant difference in fibrosis regression between groups(i.e.,mean-4.2 kPa change in TDF and-1.6 kPa in LAM,Pmal ALT,but more TDF patients were virologically suppressed(ne cleared *** In this real-world North American study,approximately 5 years of NA achieves liver fibrosis regression rarely leads to HBsAg loss.

关键词： Nucleos(t)ide analog therapy Functional cure Hepatitis B virus surface antigen loss Fibrosis regression Liver stiffness measurement Transient elastography

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macao Secondary School EFL Teachers' Perspectives on Written Corrective Feedback: Rationales and Constraints

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教育技术与创新 2021年第1期 1-13页

作者： Wilson Cheong hin Hong University College London and an ma graduate in Linguistics at newcastle University in the UK

Corrective feedback on writing(WCF)has been one of the most controversial topics in ESL/EFL *** the past decades,much has been disputed regarding the effectiveness and preferences of the quantity,focus,directness and source of *** so much uncertainty,the researcher set out to investigate how research-informed secondary school teachers in macao reported their beliefs,rationales,practices and constraints of administering corrective feedback for EFL writing in macao secondary *** secondary school teachers were recruited at a TESOL conference to conduct focus-group *** to previous findings,results suggest teachers had clear rationales as to their ways of practising ***,many expressed difficulties in acting according to rationales and *** their experience and knowledge,practical constraints such as school policies and teacher workload made it unlikely for them to follow their thoughts with feedback on *** study identified six sources of constraints that could prohibit practices and potentially reshape ones’beliefs,which sheds light on future directions of WCF research.

关键词： beliefs practice written corrective feedback EFL teachers error correction

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Current and future molecular diagnostics in colorectal cancer and colorectal adenoma

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World Journal of Gastroenterology 2014年第14期20卷 3847-3857页

作者： Andy hin-Fung Tsang Ka-Ho Cheng Apple Siu-Ping Wong Simon Siu-man Ng Brigette Buig-Yue ma Charles Ming-Lok Chan Nancy Bo-Yin Tsui Lawrence Wing-Chi Chan Benjamin Yat-Ming Yung Sze-Chuen Cesar Wong Department of Health Technology and Informatics Faculty of Health and Social SciencesHong Kong Polytechnic University Department of Surgery Prince of Wales Hospital State Key Laboratory in Oncology in South China Sir Y K Pao Centre for CancerDepartment of Clinical OncologyHong Kong Cancer Institute and Prince of Wales HospitalThe Chinese University of Hong Kong

Colorectal cancer(CRC)is one of the most prevalent cancers in developed *** the other hand,CRC is also one of the most curable cancers if it is detected in early stages through regular colonoscopy or *** CRC develops slowly from precancerous lesions,early detection can reduce both the incidence and mortality of the *** occult blood test is a widely used non-invasive screening tool for *** fecal occult blood test is simple and cost-effective in screening CRC,there is room for improvement in terms of the accuracy of the *** dysregulations have been found to play an important role in CRC *** better understanding of the molecular basis of CRC,there is a growing expectation on the development of diagnostic tests based on more sensitive and specific molecular markers and those tests may provide a breakthrough to the limitations of current screening tests for *** this review,the molecular basis of CRC development,the characteristics and applications of different non-invasive molecular biomarkers,as well as the technologies available for the detection were *** review intended to provide a summary on the current and future molecular diagnostics in CRC and its pre-malignant state,colorectal adenoma.

关键词： Colorectal cancer Colorectal adenoma Molecular diagnostics Fecal occult blood test Non-invasive

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Evaluating the efficacy of an attenuated Streptococcus equi ssp. zooepidemicus vaccine produced by multi-gene deletion in pathogenicity island SeseCisland_4

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Journal of Integrative Agriculture 2019年第5期18卷 1093-1102页

作者： ma Fang WANG Guang-yu ZHOU Hong ma Zhe LIN Hui-xing FAN Hong-jie MOE Joint International Research Laboratory of Animal Health and Food Safety College of Veterinary Medicine Nanjing Agricultural University National Center of Meat Quality and Safety Control Nanjing Agricultural University Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses Yangzhou University

Streptococcus equi ssp. zooepidemicus(SEZ) is a pathogen associated with a wild range of animal species. Frequent outbreaks have occurred in recent years in pigs, horses, goats and dogs which is liable to infect humans. There is a lack of efficient vaccines against this disease and the occurrence of antibiotic resistance may render drug therapies ineffective. In this study, gene deletion mutant(ΔSEZ) in pathogenicity islands SeseCisland_4 was constructed. The mutant ΔSEZ had a 52-fold decrease in 50% lethal dose(LD_(50)) and had less capacity to adhere epithelial cells. Importantly, immunization of mice with attenuated vaccine ΔSEZ at the dose of 10~2 colony-forming units(CFU) mL^(–1) elicited a significant humoral antibody response, with an antibody titer of 1:12 800. Therefore, 10~2 CFU mL^(–1) might be used as the appropriate immune dose for the attenuated vaccine ΔSEZ, which provided mice with efficient protection against virulent SEZ. In addition, the hyperimmune sera against 10~2 CFU m L–1 attenuated vaccine ΔSEZ could confer significant protection against virulent SEZ infection in the passive immunization experiment and exhibited efficient bactericidal activity in the whole blood assay. Meanwhile, no viable bacteria was detected in blood when mice were immunized with ΔSEZ at the dose of 10~2 CFU mL^(–1) via hypodermic injection. Thereafter, the mutant ΔSEZ at the dose of 10~2 CFU mL^(–1) could confer significant protection in mice and had less negative effects on host, which could be an effective attenuated vaccine candidate for the prevention of SEZ.

关键词： Streptococcus equi ssp.zooepidemicus zoonosis attenuated vaccine immune dose

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