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Enhancing photodynamic inactivation via tunning spatial constraint on photosensitizer

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Science China Chemistry 2024年第2期67卷 652-663页

作者： chong Li Minghao Han Ji Gao Shuxian Wang Song-Bo Lu Yaxi Li Zhao Liu Chen Zhang Zhaojin Wang Fangliang Wang Yuang Sun Chun loong Ho Kai Wang Yun Shen Kai Li Shenzhen Key Laboratory of Smart Healthcare Engineering Guangdong Provincial Key Laboratory of Advanced BiomaterialsDepartment of Biomedical EngineeringSouthern University of Science and TechnologyShenzhen518055China Department of Chemical and Environmental Engineering University of California RiversideRiverside92521USA Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen518055China

The critical factor of spatial constraint,provided by the external confinement(e.g.,matrix),is often overlooked during photodynamic inactivation,despite playing a crucial role in determining the molecular photophysical process and subsequent antipathogen ***,as a proof-of-concept model,we employed two types of polymers with varying interaction energies with dopants to investigate the intrinsic relationship between spatial constraint and the essential excited-state behaviors of doped photosensitizer(4-(2-(5-(4-(diphenylamino)phenyl)thiophen-2-yl)ethyl)-1-methylquinolin-1-ium iodine,TPP).Through experimental investigation and theoretical calculations,we found that TPP tends to remain in the excited state for a shorter dwell time under weaker spatial constraints due to less restricted molecular motion in polyurethane(PU) ***,the singlet oxygen(^(1)O_(2)) generated from doped-TPP shows a 9.23-fold enhancement in PU than in the polyvinylchloride(PVC) *** light irradiation,the PU@TPP nanofiber can efficiently eliminate the coronavirus MHV-A59(≥99.9997%) at a 220,000-fold higher concentration than the infected *** antibacterial efficacy has also been demonstrated,with a killing rate of ≥99%.

关键词： photodynamic antibacterial singlet oxygen triphenylamine nanofiber

Fuzzy-based risk prioritization for a hydrogen refueling facility in Malaysia

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第8期14卷 834-834页

作者： Hue-yee chong Mahidzal Dahari Hwa-jen Yap Ying-tai loong Department of Mechanical Engineering Faculty of Engineering University Malaya Kuala Lumpur Malaysia

Hydrogen is starting to be mentioned as an alternative fuel to replace the fossil fuel in future transportation applications due to its characteristics of zero greenhouse gas emission and high energy efficiency. Before hydrogen fuel and its facilities can be introduced to the public, relevant safety issues and its hazards must be assessed in order to avoid any chance of injury or loss. While a traditional risk assessment has difficulty in prioritizing the risk of failure modes, this paper proposes a new fuzzy-based risk evaluation technique which uses fuzzy value to prioritize the risk of various scenarios. In this study, the final risk of each failure modes was prioritized by using the MATLAB fuzzy logic tool box with a combination of two assessments. The first assessment was concerned with the criteria which affected the actual probability of *** assessment considered the availability of the standard that was applied to prevent the likelihood of the scenario occurring. On the other hand, the second assessment was focused on evaluating the consequence of the failure by taking into account the availability of detection and the complexity of the failure rather than only the severity of the scenarios. A total of 87 failure scenarios were identified using failure modes and effect analysis(FMEA) procedures on hydrogen refueling station models. Fuzzy-based assessments were performed through risk prioritizing various failure scenarios with a fuzzy value(0 to 1) and risk level(low, medium, and high)while a traditional risk assessment approach presented the risks only in forms of level(low, medium, and/or high). Availability of the fuzzy value enabled further prioritizing on the risk results that fell in the same level of risk. This study concluded that fuzzy-based risk evaluation is able to further prioritize the decisions when compared with a traditional risk assessment method.

关键词：风险评估方法模糊值加氢站马来西亚设施优先级模糊逻辑工具箱故障模式

Development of a system configuration for a solar powered hydrogen facility using fuzzy logic control

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第11期14卷 822-834页

作者： Ying-tai loong Mahidzal DAHARI Hwa-jen YAP Hue-yee chong Department of Mechanical Engineering Faculty of Engineering University MalayaKuala Lumpur 50603 Malaysia

Solar energy is a natural resource which can be harnessed to provide clean electricity for hydrogen production ***, this technology is not widely used because of control issues, particularly for hydrogen refuelling stations. At present,direct or DC-DC converter couplings are the most common system configurations for hydrogen refuelling stations. However, these system configurations are costly and suffer from gas shortage at hydrogen refuelling stations. Furthermore, the hydrogen produced by such system configurations varies considerably depending on the levels of solar radiation. In order to address these issues, a new system configuration is proposed, incorporating the feedback signal of the storage level in the control system. The photovoltaic(PV) system, electrolyzer, and storage tank are integrated with a fuzzy logic controller(FLC) to determine the backup current compensation for electrolyzer operation in order to obtain the minimum power required for hydrogen production. The proposed FLC is constructed with three input variables which are the PV current, hydrogen storage level, and the battery state of charge. The rules-based fuzzy inference process is based on the proposed configuration which combines the advantages of direct and DC-DC converter coupling configurations. The simulation results show that the proposed configuration offers better adaptability to variable radiation conditions compared to other methods. This gives a more promising option for ensuring the adequacy of hydrogen supply at hydrogen refuelling stations.

关键词： Hydrogen energy Solar energy Hydrogen refueling facility Fuzzy logic

The Role of Deep Learning in Parking Space Identification and Prediction Systems

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计算机、材料和连续体（英文） 2023年第4期75卷 761-784页

作者： Faizan Rasheed Yasir Saleem Kok-Lim Alvin Yau Yung-Wey chong Sye loong Keoh School of Physics Engineering and Computer ScienceUniversity of HertfordshireHatfieldAL109ABUK Department of Computer Science Aberystwyth UniversityAberystwyth SY233FLUK Lee Kong Chian Faculty of Engineering and Science Universiti Tunku Abdul RahmanKajang43200SelangorMalaysia National Advanced IPv6 Centre(NAv6) Universiti Sains MalaysiaPenang11800Malaysia School of Computing Science University of Glasgow Singapore737729Singapore

In today’s smart city transportation,traffic congestion is a vexing issue,and vehicles seeking parking spaces have been identified as one of the causes leading to approximately 40%of traffic *** parking spaces alone is insufficient because an identified available parking space may have been taken by another vehicle when it arrives,resulting in the driver’s frustration and aggravating traffic jams while searching for another parking *** explains the need to predict the availability of parking ***,deep learning(DL)has been shown to facilitate drivers to find parking spaces efficiently,leading to a promising performance enhancement in parking identification and prediction ***,no work reviews DL approaches applied to solve parking identification and prediction *** by this gap,the purpose of this work is to investigate,highlight,and report on recent advances inDLapproaches applied to predict and identify the availability of parking *** of DL-based parking identification and prediction systems is established as a methodology by classifying and categorizing existing literature,and by doing so,the salient and supportive features of different DL techniques for providing parking solutions are ***,several open research challenges are *** work identifies that there are various DL architectures,datasets,and performance measures used to address parking identification and prediction ***,there are some open-source implementations available that can be used directly either to extend existing works or explore a new *** is the first short survey article that focuses on the use of DL-based techniques in parking identification and prediction systems for smart *** study concludes that although the deployment of DL in parking identification and prediction systems provides various benefits,the convergence of these two types of systems and DL brings about new i

关键词： Convolutional neural network deep learning neural networks parking identification parking prediction smart city

Re-Os isotopic data for molybdenum from Hejiangkou tungsten and tin polymetallic deposit in Chenzhou and its geological significance

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Journal of Central South University 2016年第5期23卷 1071-1084页

作者：刘德波杨柳邓湘伟戴雪玲王雄军 chong khai yuen 杜高峰魏和平 Key Laboratory of Non-ferrous Metalloginic Prediction of Ministry of Education(Central South University) Changsha 410083China scholl of Geosciences and Info-Physics Central South UniversityChangsha 410083China Department of Resources Engineering Hunan Engineering PolytechnicChangsha 410000China Hunan Provincial Geological Exploration Bureau Changsha 410016China Department of Geology Faculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550002China

Hejiangkou W-Sn-polymetallic deposit is a newly found deposit in Xitian ore field,one of the important and large scale W-Sn-polymetallic ore fields in the middle segment of Nanling metallogenic ***-Os isotope dating was used on three molybdenite samples from Hejiangkou deposit to determine the ore forming *** result is(224.9±2.6)Ma-(225±3.1)Ma and isochron age is(225.5±3.6)*** field geological observations,geochronological data and optical petrography indicated that Hejiangkou deposit underwent multi-period of superimposed *** can be differentiated into three periods composed of six mineralization *** first period is the initial period for hydrothermal metasomatism and metal element enrichment during Indosinian *** enrichment,strong brittle fracturing and hydrothermal metasomatism,remobilization and superimposition happened in the second period,during early *** is the major mineralization period of Hejiangkou deposit and can be subdivided into four mineralization stages,namely the skarn stage,oxide stage,high-temperature sulfide stage and low-temperature sulfide *** the third period is the mineralization period of a porphyry-skarn system related to the emplacement of the granite porphyry *** minerogenic epoch of Hejiangkou deposit is similar with Hehuaping deposit,they show the possibility of Indosinian mineralization event in Nanling metallogenic *** can be an important perspective in any future mineral exploration in the same metallogenic zone.

关键词： molybdenite Rei-Os isotope age ore-forming stage Hejiangkou deposit Xitian ore field

新疆东天山金滩金矿区安山岩岩石学、地球化学及地质意义

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中南大学学报（自然科学版） 2017年第10期48卷 2699-2710页

作者：朱余银王天国黄超文戴塔根杨柳 chong khai Yuen 杜高峰中南大学有色金属成矿预测教育部重点实验室湖南长沙410083 中南大学地球科学与信息物理学院湖南长沙410083 西南科技大学环境与资源学院四川绵阳621010 湖南工程职业技术学院资源工程系湖南长沙410015 马来西亚大学理学院马来西亚吉隆坡50603 中国科学院地球化学研究所矿床地球化学国家重点实验室贵州贵阳550002

新疆金滩金矿发育一套与成矿密切相关的安山岩,对该安山岩元素质量分数和相关性进行分析。研究结果表明:安山岩中锆石结构以及Th和U的质量分数之比ω(Th)/ω(U)(0.30~1.02)均显示其为岩浆成因,锆石LA-ICP-MS U-Pb年龄为(303.65±4.8)Ma... 详细信息

新疆金滩金矿发育一套与成矿密切相关的安山岩,对该安山岩元素质量分数和相关性进行分析。研究结果表明:安山岩中锆石结构以及Th和U的质量分数之比ω(Th)/ω(U)(0.30~1.02)均显示其为岩浆成因,锆石LA-ICP-MS U-Pb年龄为(303.65±4.8)Ma,代表安山岩形成时代;安山岩ω(Si O_2)为54.29%~69.05%,ω(Al_2O_3)为11.27%~19.46%,全碱ω(K_2O+Na_2O)为2.46%~6.81%,ω(Mg O)为3.60%~10.45%,Mg指数为46~66。安山岩轻稀土元素(LREE)富集、轻重稀土元素分异作用明显,绝大多数样品具中等Eu负异常(δω(Eu)=0.44~0.77)和轻微Ce负异常(δω(Ce)=0.93~0.98),富集K,Rb,Ba,Th和U等大离子亲石元素,相对亏损Nb和Ti等高场强元素;岩浆经历了分离结晶作用,且发生部分熔融;安山岩可能是康古尔塔格洋向南俯冲,洋壳脱水进入地幔楔,被俯冲流体交代的地幔楔部分熔融,同时产生结晶分异作用而形成,而且遭受明显的陆壳物质混染;东天山地区在晚石炭世依旧存在康古尔洋的俯冲消减作用。

关键词：晚石炭世安山岩源区性质金滩金矿

湘西董家河铅锌矿床成矿流体和成矿物质来源:来自流体包裹体和C-O-Sr同位素的制约

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矿物学报 2022年第5期42卷 557-569页

作者：杨柳尹萍徐耀鉴郑平 chong khai YUEN 湖南工程职业技术学院湖南长沙410151 马来亚大学理学院地质系马来西亚吉隆坡50603

董家河铅锌矿是湘西地区赋存于震旦系地层中唯一的大型铅锌矿床。为探讨成矿流体及成矿物质来源,系统开展了野外调研、流体包裹体测温、激光拉曼探针及C-O-Sr同位素研究。研究结果表明,矿床成矿阶段可划分为石英-黄铁矿阶段(Ⅰ)、多金... 详细信息

董家河铅锌矿是湘西地区赋存于震旦系地层中唯一的大型铅锌矿床。为探讨成矿流体及成矿物质来源,系统开展了野外调研、流体包裹体测温、激光拉曼探针及C-O-Sr同位素研究。研究结果表明,矿床成矿阶段可划分为石英-黄铁矿阶段(Ⅰ)、多金属硫化物阶段(Ⅱ)及碳酸盐阶段(Ⅲ)。原生流体包裹体类型单一,仅见气液两相、纯液相流体包裹体及少量纯气相包裹体。3个成矿阶段的流体包裹体均一温度分别为121.5~255.2℃、120.6~232.7℃和102.5~167.9℃,盐度分别为6.20%~14.77%Na Cl_(eqv)、3.39%~11.93%NaCl_(eqv)和2.07%~4.18%NaCl_(eqv)。激光拉曼测试显示流体中含有CH_(4)、C_(2)H_(6)及沥青等有机质,成矿流体属于中低温、中低盐度的H_(2)O-NaCl±CH_(4)±C_(2)H_(6)体系。方解石C-O同位素组成表明,成矿流体中的碳部分来自碳酸盐岩的溶解,部分来自于基底地层中的有机碳。方解石的^(87)Sr/^(86)Sr值(0.708237~0.710326)高于碳酸盐岩围岩,表明热液中存在来自于基底的Sr。综合分析显示以陆源碎屑为主的陡山沱组及其下伏地层为董家河铅锌矿成矿提供了物质支持。富含有机质的热卤水携带大量金属物质,在震旦系白云岩层合适构造空间内,与地层中先存的含硫酸盐的建造水混合,发生硫酸盐热化学还原作用(TSR)产生还原硫,还原硫与铅锌等金属离子结合从而导致卸载成矿。

关键词：流体包裹体稳定同位素成矿流体董家河铅锌矿

Spontaneous Rupture of the Bladder after a Seizure: A Pitfall of Diagnosis

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Surgical Science 2013年第2期4卷 128-130页

作者： Eugene Lin Ho Lin Guang-Uei Hung Jungle Chi-Hsiang Wu Huei-loong Hsieh Tah-chong Lin Chao-Chih Chen Chien-Hsiang Wang Mao-Sheng Lin Department of Life Sciences National Chung Hsing University Taichung Chinese Taipei Department of Nuclear Medicine Chang Bing Show Chwan Memorial Hospital Changhua Chinese Taipei Department of Urology Chang Bing Show Chwan Memorial Hospital Changhua Chinese Taipei Department of Urology Chushang Show Chwan Hospital Nantou City Chinese Taipei Department of Urology Show Chwan Memorial Hospital Changhua Chinese Taipei

Seizures can lead to different injuries ranging from minor lacerations to serious head injuries or bony fractures. We report a rare case of a male patient presenting with a history of a distended abdomen and gross hematuria following a seizure attack. After catheterization, the drained urine was bloodstained. On clinical suspicion of an acute abdomen, computed tomography was conducted, which showed intraperitoneal rupture of the bladder. At laparotomy, we found and repaired a laceration in the dome of the bladder in 3 layers. The postoperative period was uneventful. Our case shows that a complete abdominal examination is needed on patients following a generalized seizure episode. We also suggest that certain drugs for treating schizophrenia have anticholinergic effects, which may induce chronic urine retention. Chronic urine retention, especially in elderly male patients, may contribute to the risk of a spontaneous rupture of the bladder.

关键词： Bladder Injury Provoked Seizure Intraperitoneal Bladder Rupture Seizure

Singapore's Engagement with BRI--The Singaporean government is actively bolstering economic cooperation with China

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China Report ASEAN 2019年第7期4卷 61-63页

作者： chong Jing Yee International Relations at Peking University China

“The Belt and Road Initiative [BRI] can contribute greatly to a peaceful, orderly shift in the global order and support China’s constructive international role commensurate with its size and potential,” uttered by Singapore’s Prime Minister Lee Hsien loong during a five-day visit to Beijing for the second Belt and Road Forum—an international summit led and hosted by Chinese President Xi Jinping. Noting that Singapore had been an “early and strong supporter” of the BRI, Lee asserted that Singapore was well placed to make a “modest contribution” to the BRI. He cited the example of the chongqing Connectivity Initiative (CCI)—a joint Sino-Singapore project launched in 2015—as an area where Singapore could make a useful contribution to the BRI through improving land and sea trade and transport connectivity.

关键词： BRI peaceful connectivity