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The quality of escalator signage for public safety in Malaysia:an observational study

Global Health Journal 2021年第4期5卷 198-203页

作者： Chii-Chii Chew chee-tao chang Xin-Jie Lim Hasni-Adha Ibrahim Hamiazwa Azmi Nur-Ilyana Wahabi Nur-Shuhaida Hamdan Nurul-Atiqah Nazan Nur-Haliana Karim Nurfarahdila-Ahmad Malawi Ying-Ling Oon Norshazila-Julia MS Amar-Singh HSS Clinical Research Center Hospital Raja Permaisuri BainunLevel 4Ambulatory Care CenterJalan Raja Ashman ShahIpohPerak 30450Malaysia Allied Health Science College Sultan Azlan Shah Ministry of HealthTanjong RambutanIpohPerak Darul Ridzuan 31250Malaysia Department of Paediatric Hospital Raja Permaisuri BainunMinistry of HealthJalan Raja Ashman ShahIpohPerak 30450Malaysia

Objective:Escalator signage could be playing a vital role to alert users for safe use of *** study aimed to evaluate the availability,standardization,and content of safety information on escalator signage in the shopping ***:An observational study was conducted from November 2017 to February 2018 to assess the availability,standardization of safety information among the signage inside the shopping mall,and the content of safety information for public safety in Malaysia.A checklist was developed by adapting escalator safety guidelines from seven countries and regions including *** collctors identified from the selected states were required to capture three photographs at different angles of the escalator signage for each ascending and descending directions at each entrance of the *** analysis was performed;each criterion was presented in frequency and ***:A total of 268 escalators from 84 shopping malls in 9 states of Malaysia were *** operating escalators were not equipped with *** than one-ifth(23.0%)of the signage was not standardized within the *** majority of safety information was displayed in the form of a pictogram,a minority of signage displayed information in both pictogram and text format:"children must hold hand"(12.7%)and"be careful of long clothing"(10.8%),***,"toddlers should be carried"(8.6%)and"take extra care with rubber shoes/tied shoes/laces"(30.2%)were found absent in most of the ***:Escalator signage was present in almost all of the escalators ***,non-standardization of the signage of escalators should warrant the attention of relevant authorities to revise the safety guideline s and improve the quality of escalator.

关键词： Elevators and escalators Safety Transportation facilities Environment and public health Malaysia

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High‑Entropy Electrode Materials:Synthesis,Properties and Outlook

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Nano-Micro Letters 2025年第1期17卷 472-506页

作者： Dongxiao Li chang Liu Shusheng tao Jieming Cai Biao Zhong Jie Li Wentao Deng Hongshuai Hou Guoqiang Zou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083People’s Republic of China School of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan 411104People’s Republic of China

High-entropy materials represent a new category of high-performance materials,first proposed in 2004 and extensively investigated by researchers over the past two *** definition of high-entropy materials has continuously *** the last ten years,the discovery of an increasing number of high-entropy materials has led to significant advancements in their utilization in energy storage,electrocatalysis,and related domains,accompanied by a rise in techniques for fabricating high-entropy electrode ***,the research emphasis has shifted from solely improving the performance of high-entropy materials toward exploring their reaction mechanisms and adopting cleaner preparation ***,the current definition of high-entropy materials remains relatively vague,and the preparation method of high-entropy materials is based on the preparation method of single metal/low-or medium-entropy *** should be noted that not all methods applicable to single metal/low-or medium-entropy materials can be directly applied to high-entropy *** this review,the definition and development of high-entropy materials are briefly ***,the classification of high-entropy electrode materials is presented,followed by a discussion of their applications in energy storage and catalysis from the perspective of synthesis ***,an evaluation of the advantages and disadvantages of various synthesis methods in the production process of different high-entropy materials is provided,along with a proposal for potential future development directions for high-entropy materials.

关键词： High-entropy Energy storage Electrode materials

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Thorium distribution on the Moon:new insights from chang’E-2 gamma-ray spectrometer

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Research in Astronomy and Astrophysics 2019年第6期19卷 1-14页

作者： Meng-Hua Zhu Jin chang tao Ma State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and Technology Taipa Macao China Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210034 China CAS Center for Excellence in Comparative Planetology Hefei 230026 China

We present the thorium distribution on the lunar surface derived from observations by the chang’E-2 gamma-ray spectrometer(CE-2 GRS). This new map shows a similar thorium distribution to previous observations. In combination with this new thorium map and impact cratering model, we investigate the origination of thorium on the Moon’s highlands, which was previously thought to be contributed from Imbrium ejecta. We found that the Imbrium ejecta has a small contribution(~20%–30%) to the thorium on the lunar highlands but most thorium is likely to be indigenous before the deposition of the Imbrium ejecta. This new thorium map also confirms that the eastern highlands have a relatively higher thorium concentration than the western highlands. We propose that the thin crust and large basins on the eastern highlands are responsible for this difference in thorium.

关键词： Moon-chang'E-2 Gamma-ray Spectrometer-Thorium distribution

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Bridging Real World Semantics to Model World Semantics for Taxonomy Based Knowledge Representation System

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Journal of Computer Science & Technology 2005年第3期20卷 296-308页

作者： Ju-HumKwon chee-YangSong chang-JooMoon Doo-KwonBaik DepartmentofComputerScienceandEngineering SoftwareSystemLaboratoryKoreaUniversity15-kaAnam-dongSungbuk-kuSeoul136-701Korea DepartmentofComputerScience KonkukUniversity322Danwol-dongChungju-siChungcheongbuk-do380-701Korea

As a mean to map ontology concepts, a similarity technique is *** a context dependent concept mapping is tackled, which needs contextual information fromknowledge taxonomy. Context-based semantic similarity differs from the real world similarity in thatit requires contextual information to calculate similarity. The notion of semantic coupling isintroduced to derive similarity for a taxonomy-based system. The semantic coupling shows the degreeof semantic cohesiveness for a group of concepts toward a given context. In order to calculate thesemantic coupling effectively, the edge counting method is revisited for measuring basic semanticsimilarity by considering the weighting attributes from where they affect an edge''s strength. Theattributes of scaling depth effect, semantic relation type, and virtual connection for the edgecounting are considered. Furthermore, how the proposed edge counting method could be well adaptedfor calculating context-based similarity is showed. Thorough experimental results are provided forboth edge counting and context-based similarity. The results of proposed edge counting wereencouraging compared with other combined approaches, and the context-based similarity also showedunderstandable results. The novel contributions of this paper come from two aspects. First, thesimilarity is increased to the viable level for edge counting. Second, a mechanism is provided toderive a context-based similarity in taxonomy-based system, which has emerged as a hot issue in theliterature such as Semantic Web, MDR, and other ontology-mapping environments.

关键词： semantic similarity context-based similarity edge counting semanticcoupling weighting attributes WordNet

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Efficient and simple synthesis of B_(2)O_(3)-Al_(2)O_(3)nanocomposites assisted by deep eutectic solvent for production of 5-hydroxymethylfurfural from glucose

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Nano Research 2025年第1期18卷 236-248页

作者： Yuchen Wang Kai Rong Shanlei chang Youxing Fang Shaojun Dong State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China College of Chemistry Jilin UniversityChangchun 130012China

The catalytic conversion of glucose to high valueadded platform chemical 5-hydroxymethylfurfural(HMF)is a promising biorefinery process,and alumina-boria catalysts are considered to be green and mild solid acid catalysts for this catalytic ***,compared to the common synthesis methods with complicated steps,we reported a simple and efficient strategy to prepare B_(2)O_(3)-Al_(2)O_(3)nanocomposites by calcining cost-effective glucose-urea deep eutectic solvent(DES)solution containing the *** prepared B_(2)O_(3)-Al_(2)O_(3)nanocomposites exhibited an open three-dimensional skeleton and two-dimensional porous lamellar substructure,endowing them with a high specific surface area(228.27 m2/g).The introduction of boron changed the ratios of different aluminum species(AlⅣ,AlⅤ,and AlⅥ)and borate species(BO3 and BO4),thus further affecting the acidity and the types of acid sites of the *** prepared B_(2)O_(3)-Al_(2)O_(3)bifunctional acid catalysts possessing abundant Lewis acid sites and adjustable Brønsted acid sites showed complete glucose conversion and 55.38%of HMF yield under the optimum *** study proposed a concise method to synthesize alumina-boria solid acid catalysts assisted by glucose-urea *** hope to extend the application and prospect of this efficient and simple synthesis strategy.

关键词： 5-hydroxymethylfurfural(HMF) deep eutectic solvent glucose alumina-boria acid catalyst

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Interconnections between diabetic corneal neuropathy and diabetic retinopathy:diagnostic and therapeutic implications

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Neural Regeneration Research 2025年第8期20卷 2169-2180页

作者： Mingyi Yu Faith Teo En Ning chang Liu Yu-Chi Liu Tissue Engineering and Stem Cell Group Singapore Eye Research InstituteSingapore Yong Loo Lin School of Medicine National University of SingaporeSingapore Department of Cornea and External Eye Disease Singapore National Eye CenterSingapore Ophthalmology and Visual Sciences Academic Clinical Program Duke-NUS Medical SchoolSingapore

Diabetic corneal neuropathy and diabetic retinopathy are ocular complications occurring in the context of diabetes *** corneal neuropathy refers to the progressive damage of corneal *** retinopathy has traditionally been considered as damage to the retinal ***,growing evidence suggests that diabetic retinopathy is a complex neurovascular disorder resulting from dysfunction of the neurovascular unit,which includes both the retinal vascular structures and neural *** retinopathy is one of the leading causes of blindness and is frequently screened for as part of diabetic ocular ***,diabetic corneal neuropathy is commonly overlooked and underdiagnosed,leading to severe ocular surface *** studies have found that these two conditions tend to occur together,and they share similarities in their pathogenesis pathways,being triggered by a status of chronic *** review aims to discuss the interconnection between diabetic corneal neuropathy and diabetic retinopathy,whether diabetic corneal neuropathy precedes diabetic retinopathy,as well as the relation between the stage of diabetic retinopathy and the severity of corneal *** also endeavor to explore the relevance of a corneal screening in diabetic eyes and the possibility of using corneal nerve measurements to monitor the progression of diabetic retinopathy.

关键词： cornea corneal nerves diabetes diabetic corneal neuropathy diabetic retinopathy retina

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Lunar potassium distribution:Results from chang'E-1 gamma ray spectrometer

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Science China(Physics,Mechanics & Astronomy) 2011年第11期54卷 2083-2090页

作者： ZHU Meng-Hua MA tao chang Jin TANG ZeSheng IP Wing-Huen XU AoAo Space Exploration Laboratory Macao University of Science and Technology Avenida Wai Long Taipa Macao China Purple Mountain Observatory Chinese Academy of Sciences 2 West Beijing Road Nanjing 210008 China

The global map of potassium is represented in this paper from chang'E-1 (CE-1) Gamma-ray Spectrometer (CGRS) for its one-year *** a linear relationship between net count rate and its abundance,the average potassium abundance of individual landing sites is used as ground-truth for the calibration to derive the global map of absolute *** CGRS spectra have a lower signal-to-noise ratio,the translated map still keeps relative *** calculated from Apollo,Lunar Prospector,and Kaguya,global potassium map from CGRS shows high concentrations on the lunar nearside and secondary concentrations located in the South Pole-Aitken (SPA) basin on the *** comparison with Lunar Prospector potassium map shows a good correlation,though abundances on the highlands of the farside are much lower than that of Lunar *** the footprint of CGRS measurements is larger than the sampling radius of each landing site,the calibrated map shows a larger variation range of the scale than that of Lunar Prospector,which was derived using theoretical calculation;namely,the calibrated map has higher values in the areas with high concentration while having lower values for the areas with lower ***,the derived potassium map is more consistent with the lunar sample data than that of Lunar Prospector.

关键词： chang'E-1 gamma-ray spectrometer potassium distribution empirical calibration

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An Accurate Near-Field Distance Estimation Differential Algorithm

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Chinese Journal of Electronics 2022年第5期31卷 851-859页

作者： ZHAO Yan tao Haihong chang Xin National Key Laboratory of Radar Signal Processing Xidian Univercity The 54th Research Institute China Electronics Technology Group Corporation School of Electronic Engineering Xidian University

The triangular geometry is the basis of near field array accurate distance estimation *** Fisher expression of traditional distance estimation is derived by utilizing the Taylor series. To improve convergence rate and estimation accuracy, a novel iterative distance estimation algorithm is proposed with differential equations based on the triangular geometry. Firstly, its convergence performance is analysed in detail. Secondly,the selection of the initial value and the number of iterations are respectively studied. Thirdly, compared with the traditional estimation algorithms by utilizing the Fisher approximation, the proposed algorithm has a higher convergence rate and estimation accuracy. Moreover, its pseudocode is presented. Finally, the experiment results and performance analysis are provided to verify the effectiveness of the proposed algorithm.

关键词： iterative methods iterative distance estimation convergence performance triangular geometry Fisher expression approximation theory convergence near-field distance estimation Fisher approximation Taylor series differential equations estimation theory

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Nψ,φ-type Quotient Modules over the Bidisk

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Acta Mathematica Sinica,English Series 2020年第8期36卷 943-960页

作者： chang Hui WU tao YU School of Mathematical Sciences Qufu Normal UniversityQufu 273165P.R.China School of Mathematical Sciences Dalian University of TechnologyDalian 116024P.R.China

Let H^2(D^2)be the Hardy space over the bidisk D^2,and let Mψ,φ=[(ψ(z)-φ(w))^2]be the submodule generated by(ψ(z)-φ(w))2,whereψ(z)andφ(w)are nonconstant inner *** related quotient module is denoted by Nψ,φ=H^2(D^2)ΘMψ,φ.In this paper,we give a complete characterization for the essential normality of Nψ,φ.In particular,ifψ(z)=z,we simply write Mψ,φand Nψ,φas Mφand Nφ*** paper also studies compactness of evaluation operators L(0)|Nφand R(0)|Nφ,essential spectrum of compression operator Sz on Nφ,essential normality of compression operators Sz and Sw on Nφ.

关键词： Quotient module compression operators essential normality

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A parameter estimation based adaptive actuator failure compensation control scheme

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Journal of Systems Engineering and Electronics 2011年第1期22卷 1-11页

作者： Gang tao Ruiyun Qi chang Tan Depamnent of Electrical and Computer Engineering University of Virginia Charlottesville VA 22904 USA College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 E R. China

An adaptive actuator failure compensation control scheme is developed using an indirect adaptive control method,by calculating the controller parameters from adaptive estimates of system parameters and actuator failure parameters.A key technical issue is how to deal with the actuator failure uncertainties such as failure pattern,time and values.A complete parametrization covering all possible failures is used to solve this issue for adaptive parameter estimation.A simultaneous mapping from the estimated system/failure parameters to the controller parameters is employed to make the control system capable of ensuring the desired system performance under failures,which is verified by simulation results.

关键词： actuator failure compensation adaptive control failure pattern and values parameter estimation stability and tracking uncertainty parametrization.

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