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Understanding and Detecting Inefficient Image Displaying Issues in Android Apps

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Journal of Computer Science & Technology 2024年第2期39卷 434-459页

作者：李文杰马骏蒋炎岩许畅马晓星 State Key Laboratory of Novel Software Technology Nanjing UniversityNanjing 210023China Department of Computer Science and Technology Nanjing UniversityNanjing 210023China

Mobile applications(apps for short)often need to display ***,inefficient image displaying(IID)issues are pervasive in mobile apps,and can severely impact app performance and user *** paper first establishes a descriptive framework for the image displaying procedures of IID *** on the descriptive framework,we conduct an empirical study of 216 real-world IID issues collected from 243 popular open-source Android apps to validate the presence and severity of IID issues,and then shed light on these issues’characteristics to support research on effective issue *** the findings of this study,we propose a static IID issue detection tool TAPIR and evaluate it with 243 real-world Android ***,49 and 64 previously-unknown IID issues in two different versions of 16 apps reported by TAPIR are manually confirmed as true positives,respectively,and 16 previously-unknown IID issues reported by TAPIR have been confirmed by developers and 13 have been ***,we further evaluate the performance impact of these detected IID issues and the performance improvement if they are *** results demonstrate that the IID issues detected by TAPIR indeed cause significant performance degradation,which further show the effectiveness and efficiency of TAPIR.

关键词： Android application(app) inefficient image displaying(IID) performance empirical study static analysis

Liquid Metal Grid Patterned Thin Film Devices Toward Absorption‑Dominant and Strain‑Tunable Electromagnetic Interference Shielding

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Nano-Micro Letters 2024年第11期16卷 541-553页

作者： Yuwen Wei Priyanuj Bhuyan Suk Jin Kwon Sihyun Kim Yejin Bae Mukesh Singh Duy Thanh Tran Minjeong Ha Kwang‑Un Jeong xing ma Byeongjin Park Sungjune Park Department of Polymer‑Nano Science and Technology Department of Nano Convergence EngineeringJeonbuk National UniversityJeonju 54896Republic of Korea School of Chemical Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Composites Research Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea School of materials Science and Engineering Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea School of materials Science and Engineering and Sauvage Laboratory for Smart MaterialsHarbin Institute of Technology(Shenzhen)ShenzhenGuangdong 518055People’s Republic of China

The demand of high-performance thin-film-shaped deformable electromagnetic interference(EMI)shielding devices is increasing for the next generation of wearable and miniaturized soft *** highly reflective conductive materials can effectively shield EMI,they prevent deformation of the devices owing to rigidity and generate secondary electromagnetic pollution ***,soft and stretchable EMI shielding thin film devices with absorption-dominant EMI shielding behavior is *** devices consist of liquid metal(LM)layer and LM grid-patterned layer separated by a thin elastomeric film,fabricated by leveraging superior adhesion of aerosol-deposited LM on *** devices demonstrate high electromagnetic shielding effectiveness(SE)(SE_(T) of up to 75 dB)with low reflectance(SER of 1.5 dB at the resonant frequency)owing to EMI absorption induced by multiple internal reflection generated in the LM grid ***,the excellent stretchability of the LM-based devices facilitates tunable EMI shielding abilities through grid space adjustment upon strain(resonant frequency shift from 81.3 to 71.3 GHz@33%strain)and is also capable of retaining shielding effectiveness even after multiple strain *** newly explored device presents an advanced paradigm for powerful EMI shielding performance for next-generation smart electronics.

关键词： Absorption-dominant electromagnetic interference shielding Liquid metals Soft and stretchable electronics Thin film devices Tunable electromagnetic interference shielding

Crystal structure and absolute configuration of guan-fu G base methyliodide

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Chinese Journal of Chemistry 1984年第1期2卷 1-5页

作者： CHEN Shi-Zhi ma xing-Qi WANG Yao-Ping Institute of Biophysics,Academia Sinica,Beijing Institute of Biophysics. Academia Sinica Beijing

Guan-fu base G is a new alkaloid isolated from root tuber of Aconiturn coreanum Le'***-fu base G methyliodide crystallizes in orthorhombic system,space group D4/2-P212121,with dimensions:a=16.87A,b=16.93A,c=10.09A;Z=*** three dimensional data werecollected on a Phillips PW-1100 four-circle diffractometer with Mo Kα*** structure was solved by heavy-atom method and subsequently successive Fourier *** structure was refined by block-diagonal matrix least squares methods to R=0.0578 for *** absolute configuration was determined by computation of the R factor for the twopossible configurations using anomalous scattering of iodine.

关键词： Crystal structure and absolute configuration of guan-fu G base methyliodide base

Modification of alternative splicing in bovine somatic cell nuclear transfer embryos using engineered CRISPR-Cas13d

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Science China(Life Sciences) 2022年第11期65卷 2257-2268页

作者： Rui Cheng Xiaoman Zheng Yingmei Wang xing ma Xin Liu Wenjun Xu Mengyun Wang Yuanpeng Gao Xupeng xing Chuan Zhou Hongzheng Sun Zekun Guo Fusheng Quan Jun Liu Song Hua Yongsheng Wang Yong Zhang Xu Liu College of Veterinary Medicine Northwest A&F UniversityKey Laboratory of Animal Biotechnology of the Ministry of AgricultureYangling 712100China

Animal cloning can be achieved by somatic cell nuclear transfer(SCNT),but the resulting live birth rate is relatively *** previously improved the efficiency of bovine SCNT by exogenous melatonin treatment or by overexpression of lysine-specific demethylase 4D(KDM4D)and 4E(KDM4E).In this study,we revealed abundant alternative splicing(AS)transitions during fertilization and embryonic genome activation,and demonstrated abnormal AS in bovine SCNT embryos compared with in vitro fertilized *** used the CRISPR-Cas13d RNA-targeting system to target cis-elements of ABI2 and ZNF106 pre-m RNA to modify AS,thus reducing the ratio of abnormal-isoform SCNT embryos by nearly 50%and achieving a high survival rate(11%–19%).These results indicate that this system may provide an efficient method for bovine cloning,while also paving the way for further improvements in the efficiency of SCNT.

关键词： animal cloning alternative splicing CRISPR-Cas13d bovine

Cu-Ag-Zr-Ce合金时效性能和电磨损性能的研究

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金属热处理 2005年第C期30卷 188-191页

作者：马行驰同济大学材料科学与工程学院上海200092

本文对Cu-0．1Ag-0．18Zr-0．068Ce合金时效后的导电率和显微硬度以及电滑动磨损性能进行了研究。结果表明：合金940℃固溶1h后，在560℃时效可获得较高的导电率；在480℃时效可获得较高的显微硬度。时效前冷变形能大大加快第二相的析... 详细信息

本文对Cu-0．1Ag-0．18Zr-0．068Ce合金时效后的导电率和显微硬度以及电滑动磨损性能进行了研究。结果表明：合金940℃固溶1h后，在560℃时效可获得较高的导电率；在480℃时效可获得较高的显微硬度。时效前冷变形能大大加快第二相的析出过程，使合金综合性能得到显著提高。固溶合金经60％变形后在480℃时效1h其导电率和显微硬度分别可达83％IACS和135HV。在载流条件下，Cu-0．1Ag-0．18Zr-0．068Ce合金的耐磨性能较Cu-0．1Ag-0．18Zr合金大幅度提高。

关键词： Cu-Ag-Zr-Ce合金时效冷变形导电率显微硬度电磨损

An Efficient Rice Mutagenesis System Based on Suspension-Cultured Cells

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Journal of Integrative Plant Biology 2013年第2期55卷 122-130页

作者： Yuan-Ling Chen Hui-Lin Liang xing-Liang ma Su-Lin Lou Yong-Yao Xie Zhen-Lan Liu Le-Tian Chen Yao-Guang Liu State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources College of Life Sciences South China Agricultural University

Plant mutants are important bio-resources for crop breeding and gene functional studies. Conventional methods for generating mutant libraries by mutagenesis of seeds with physical or chemical agents are of low efficiency. Here, we developed a highly-efficient ethyl methanesulfonate （EMS） mutagenesis system based on suspension-cultured cells, with rice （Oryza sativa L.） as an example. We show that treatment of suspension-cultured tiny cell clusters with 0.4% EMS for 18-22 h followed by differentiation and regeneration produced as high as 29.4% independent mutant lines with visible phenotypic variations, including a number of important agronomic traits such as grain size, panicle size, grain or panicle shape, tiller number and angle, heading date, male sterility, and disease sensitivity. No mosaic mutant was observed in the mutant lines tested. In this mutant library, we obtained a mutant with an abnormally elongated uppermost internode. Sequencing and functional analysis revealed that this is a new allelic mutant of eui （elongated uppermost internode） caused by two point mutations in the first exon of the EUI gene, representing a successful example of this mutagenesis system.

关键词： Rice mutagenesis EMS suspension cell culture mutant.

The instability of wrist joint and total wrist replacement

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Chinese Journal of Traumatology 2016年第1期19卷 49-51页

作者： Jin-xing ma Yong-Qing xu Department of Orthopedic Surgery Kunming General Hospital Chengdu Military Region Kunming 650032 China Kunming Medical University Kunming 650500 China

Total wrist arthroplasty are not used as widely as total knee and hip replacement. The functional hands are requiring surgeons to design a durable and functional satisfying prosthesis. This article will list the main reasons that cause the failure of the prosthesis. Some remarkable and representative prostheses are listed to show the devolvement of total wrist prosthesis and their individual special innovations to fix the problems. And the second part we will discuss the part that biomechanical elements act in the total wrist replacement （TWA）. Summarize and find out what the real problem is and how we can find a way to fix it.

关键词： Total wrist replacement Rheumatoid arthritis Instability Prosthesis Biomechanics

春秋时期山西境内北狄的华夏化及其对华夏族的影响

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贵州民族研究 2005年第2期25卷 116-121页

作者：马兴东北师范大学历史文化学院吉林长春130024

春秋时期,北狄是山西境内少数部族中的重要一支,在与华夏族的交往中,晋国通过通婚、和戎和启土政策、结盟与兼并战争的策略促使北狄华夏化完成;受华夏族影响,北狄在政治、经济、文化上得以进步,同时对华夏族也产生了一定的影响。

关键词：北狄华夏化北狄对华夏族的影响

人口红利与我国民族地区的经济发展——基于面板数据的经验分析

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北京师范大学学报（社会科学版） 2014年第3期 140-147页

作者：马骍中国社会科学院民族学与人类学研究所北京100081

改革开放以来,由人口转变所形成的人口红利对于中国经济的快速增长发挥了重要作用。虽然从整体上看,我国的人口红利期将于2017年左右结束,但我国毕竟是一个幅员辽阔且地区差异巨大的国家,每个地区的人口机会窗口应该不会同时打开,同样... 详细信息

改革开放以来,由人口转变所形成的人口红利对于中国经济的快速增长发挥了重要作用。虽然从整体上看,我国的人口红利期将于2017年左右结束,但我国毕竟是一个幅员辽阔且地区差异巨大的国家,每个地区的人口机会窗口应该不会同时打开,同样也不大可能同时关闭。那么,那些在2017年(即全国总体意义上人口机会窗口已关闭的时点)之后仍能独享一段人口红利期的地区,就会获得更好的经济发展条件。问题的关键就在于,哪些地区是最有可能的"候选者"?基于已有文献研究结果和对中国现实国情的观察,可以推测:我国的民族地区是能够"独享一段人口红利期"的最有可能的"候选者"。对于我国民族地区而言,如果人口转变的经济效应更大,而且在全国其他地区的人口机会窗口已关闭的情况下,这些地区的人口红利期仍将会延续,从而能独享一段人口红利期,对于其经济发展来说就是一个重要的利好因素。基于1992-2012年我国民族八省区的面板数据,利用实证方法对人口红利与我国民族地区经济发展之间的因果关系进行的计量分析结果表明,劳动力增长率变量对我国民族地区的经济发展产生了显著的正向影响;少儿抚养比与人均GDP增长率之间是显著的负向关系;老年抚养比与人均GDP增长率之间的关系不确定。另外,投资、人力资本因素也对民族地区的经济发展具有积极作用。通过以上计量分析结果,可以有把握地说,我国民族地区近年来的经济发展享受了更大人口红利,并且相比于我国其他地区,民族地区的人口机会窗口关闭更晚。为使人口红利最大化,我国民族地区还需进行一系列改革和创新:如加快发展民族地区教育事业,加大劳动力培训力度,努力提高劳动者素质;促进民族地区产业结构转型,政府在扩大就业及提高就业质量方面要担负更大的职责;推进民族地区劳动力市场制度建设,重点是解决制度壁垒,使劳动力在地区内部、地区间的流动和配置更通畅。

关键词：人口红利人口机会窗口经济增长民族地区