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Electrospun Nanofibrous Adsorption Membranes for Wastewater Treatment:Mechanical Strength Enhancement

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Chemical Research in Chinese Universities 2021年第3期37卷 355-365页

作者： XIN Rui ma Hongyang Shyam Venkateswaran Benjamin S.Hsiao State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing100029China Department of Chemistry Stony Brook UniversityStony BrookNY117943400USA

Functional nanofibrous membranes fabricated by electrospinning technology have attracted much attention in the removal of heavy metal ions from contaminated *** high specific surface area,high porosity and ease of functionality create an enhanced throughput and high adsorption capacity of the nanofibrous ***,the relatively poor mechanical properties of the membrane with a non-woven nanofibrous structure are one of the major concerns,which can limit the applications in wastewater *** strategies and methodologies were explored to address the problems and were reviewed in this work,highlighting the possibilities of overcoming the poor mechanical properties of the nanofibrous membrane and to ensure the recyclability and reusability of the membrane during the adsorption process.

关键词： Electrospun nanofibrous membrane Mechanical property Heavy metal ion Wastewater treatment

The Agency of matter in Brian Castro’s The Garden Book

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Journal of Foreign Languages and Cultures 2022年第2期6卷 44-55页

作者： Lili ma Daoxian Zhong Hebei Normal University

This paper examines the non-human actants in Brian Castro's novel The Garden Book,including nature,the human body,and human artifacts in light of Jane Bennett's theory of vibrant matter and Castro's own arguments about the status of *** subverts the life-matter binary in this novel,giving attentiveness and respect to material powers,as well as affect and empathy to objects,thus undermining *** a pandemic era in which humans and non-humans are seen as more interconnected than ever,such empowerment and understanding are not only significant,but also necessary to build a harmonized community.

关键词： agency of matter non-human actant life-matter binary empathy

China's Large and Rising Net Foreign Asset Position

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China & World Economy 2009年第5期17卷 1-21页

作者： Guonan ma Haiwen Zhou Bank of International Settlement Basel Switzerland Chinese Academy of Social Sciences Beijing China

China＇s emergence as a major player in world trade is well known, but its growing role in global finance might have been underappreciated. China is the second largest creditor in the world today, with a net creditorposition of 30 percent of GDP in 2008. We test the importance of the growth differential, demographics, government debt, financial depth and the exchange rate in shaping China＇s net foreign asset position. Our empirical results highlight the sharp fall in the young-age dependence as one key driver behind China ＇s puzzlingly large net lender position and also confirm the neoclassical prediction that faster growth attracts more capital inflows. Looking ahead, our findings suggest that China will unlikely turn into a meaningful net debtor nation over the next two decades.

关键词： current account balance external balance sheet international investment position

Blockchain-Enabled Privacy Protection and Access Control Scheme Towards Sensitive Digital Assets management

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China Communications 2024年第7期21卷 224-236页

作者： Duan Pengfei ma Zhaofeng Zhang Yuqing Wang Jingyu Luo Shoushan School of Cyberspace Security Beijing University of Posts and TelecommunicationsBeijing 100876China

With the growth of requirements for data sharing,a novel business model of digital assets trading has emerged that allows data owners to sell their data for monetary *** the distributed ledger of blockchain,however,the privacy of stakeholder's identity and the confidentiality of data content are ***,we proposed a blockchainenabled privacy-preserving and access control scheme to address the above ***,the multi-channel mechanism is introduced to provide the privacy protection of distributed ledger inside the channel and achieve coarse-grained access control to digital ***,we use multi-authority attribute-based encryption(maABE)algorithm to build a fine-grained access control model for data trading in a single channel and describe its instantiation in *** analysis shows that the scheme has IND-CPA secure and can provide privacy protection and collusion *** with other schemes,our solution has better performance in privacy protection and access *** evaluation results demonstrate its effectiveness and practicability.

关键词： access control data trading maABE multi-channel privacy preserving

Chinese Returnees from Overseas Study:An Understanding of Brain Gain and Brain Circulation in the Age of Globalization

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Frontiers of Education in China 2015年第2期10卷 306-329页

作者： Yuping ma Suyan PAN Ontario Institute for studies in Education University of TorontoTorontoONM5S1V6Canada Department of Social Sciences Faculty of Arts and SciencesThe Hong Kong Institute of EducationHong KongChina

Among discussions on international academic mobility,a persistent challenge is to understand whether education abroad can become a source of brain gain,and whether globalization can offer source countries the hope that they might enjoy the benefits of freer cross-border flows in information and *** reference to China,this article provides an understanding of these two *** reveals practical factors affecting returnees’decision to return,their contribution to specific areas,and obstacles that limit their contribution and career *** addition,it sheds light on an emerging brain circulation between China and foreign countries,along with the increased cross-border flow of academic talent from and into China.

关键词： Chinese returnees brain gain brain circulation

Study of Graphdiyne-based magnetic materials

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Chemical Research in Chinese Universities 2021年第6期37卷 1257-1267页

作者： LI Ru ZHANG Mingjia LI Xiaodong ma Xiaodi HUANG Changshui Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao266101P.R.China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049P.R.China

Carbon-based magnetic semiconductors are easy to be modified with low cost and low power *** they can demonstrate robust long-range magnetic ordering and show great potential for application after introducing magnetic ***(GDY),as an allotrope of carbon,exhibits intrinsic semiconductor properties and paramagnetic properties due to its unique structure and the presence of sp *** improve the magnetic properties of GDY and prepare excellent magnetic semiconductor materials,scientists have done a lot of related research *** most direct and effective method to introduce magnetism is heteroatom *** this review,we have entirely described the latest GDY magnetism introduction methods,effects,and theoretical calculations,*** methods include post-doping and molecular design *** doping elements have covered non-metallic elements(N,H,F,Cl,S),metallic elements(Fe),and functional *** magnetic properties of the modified GDY materials were studied by experimental analysis and theoretical *** review provides a sufficient basis and direction for related researches.

关键词： Graphdiyne Chemical doping magnetic property Ferromagnetism semiconductor Spintronics

Expanding the Scope of Multivariate Regression Approaches in Cross-Omics Research

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Engineering 2021年第12期7卷 1725-1731页

作者： Xiaoxi Hu Yue ma Yakun Xu Peiyao Zhao Jun Wang CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Bloomberg School of Public Health Johns Hopkins UniversityBaltimoreMD 21205USA University of Chinese Academy of Sciences Beijing 100049China Department of Biostatistics University of MichiganAnn ArborMI 48109-2029USA

Recent technological advancements and developments have led to a dramatic increase in the amount of high-dimensional data and thus have increased the demand for proper and efficient multivariate regression *** traditional multivariate approaches such as principal component analysis have been used broadly in various research areas,including investment analysis,image identification,and population genetic structure ***,these common approaches have the limitations of ignoring the correlations between responses and a low variable selection ***,in this article,we introduce the reduced rank regression method and its extensions,sparse reduced rank regression and subspace assisted regression with row sparsity,which hold potential to meet the above demands and thus improve the interpretability of regression *** conducted a simulation study to evaluate their performance and compared them with several other variable selection *** different application scenarios,we also provide selection suggestions based on predictive ability and variable selection ***,to demonstrate the practical value of these methods in the field of microbiome research,we applied our chosen method to real population-level microbiome data,the results of which validated our *** method extensions provide valuable guidelines for future omics research,especially with respect to multivariate regression,and could pave the way for novel discoveries in microbiome and related research fields.

关键词： Multivariate regression methods Reduced rank regression Sparsity Dimensionality reduction Variable selection

ENHANCING GROUND RESOLUTION OF TM6 BASED ON MULTI-VARIATE REGRESSION MODEL AND SEMI-VARIOGRAM FUNCTION

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Geo-Spatial Information Science 2001年第1期4卷 43-49页

作者： ma Hongchao LI Deren NATIONAL LABORATORY FOR INFORmaTION ENGINEERING IN SURVEYING MAPPING AND PEMOTE SENSING WUHAN UNIVERSITY

It is well known that Landsat TM images are the most widely used remote sensing data in various ***,it has 7 different electromagnetic spectrum bands,among which the sixth one has much lower ground resolution compared with the other six ***,it is useful in the study of rock spectrum reflection,geothermal resources exploration,*** improve the ground resolution of TM6 to the level as that of the other six bands is a problem .This paper presents an algorithm based on the combination of multivariate regression model with semivariogram function which can improve the ground resolution of TM6 by "fusing" the data of other six *** includes the following main steps: （1） testing the correlation between TM6 and one of TM15,*** the correlation coefficient between TM6 and another one is greater than a given threshold value,then select the band to the regression analysis as an argument.（2） calculating the size of the template window within which some parameters needed by the regression model will be calculated; （3） replacing the original pixel values of TM6 by those obtained by regression analysis; （4） using image entropy as a measurement to evaluate the quality of the fused image of *** basic mechanism of the algorithm is discussed and the V C ++ program for implementing this algorithm is also presented.A simple application example is given in the last part of this paper,showing the effectiveness of the algorithm.

关键词： multi-variate regression model semi-variogram function image fusion template window V C++ programming

Packet Scheduling in Rechargeable Wireless Sensor Networks under SINR Model

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China Communications 2023年第3期20卷 286-301页

作者： Baogui Huang Jiguo Yu Chunmei ma Guangshun Li Anming Dong School of Computer Science Qufu Normal UniversityRizhao 276826China Big Data Institute Qilu University of TechnologyJinan 250353China School of Computer Science and Technology Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

Two packet scheduling algorithms for rechargeable sensor networks are proposed based on the signal to interference plus noise ratio *** allocate different transmission slots to conflicting packets and overcome the challenges caused by the fact that the channel state changes quickly and is *** first algorithm proposes a prioritybased framework for packet scheduling in rechargeable sensor *** packet is assigned a priority related to the transmission delay and the remaining energy of rechargeable batteries,and the packets with higher priority are scheduled *** second algorithm mainly focuses on the energy efficiency of *** priorities are related to the transmission distance of packets,and the packets with short transmission distance are scheduled *** sensors are equipped with low-capacity rechargeable batteries,and the harvest-store-use model is *** consider imperfect *** is,the battery capacity is limited,and battery energy leaks over *** energy harvesting rate,energy retention rate and transmission power are *** simulation results indicate that the battery capacity has little effect on the packet scheduling ***,the algorithms proposed in this paper are very suitable for wireless sensor networks with low-capacity batteries.

关键词： packet scheduling physical interference model rechargeable sensor networks SINR model