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Chinese Journal of Chemistry 2007年第7期25卷 998-1004页

作者： ATHAR.Taimur seok, sang ii KWON, Jeong Oh Indian Institute of Chemical Technology Uppal Road Tarnaka Hyderabad (A.P.) 500007 India Advanced Materials Division Korea Research Institute of Chemical Technology 100 Jang-Dong Yuseong-Gu Daejon 305-343 Korea

Heterobimetallic alkoxides are broadly recognized as versatile precursors for luminescence materials, and efforts are being made to develop novel routes by applying the concept of geometrical molecular design, for their synthesis and to design a single source precursor suited to photoluminescent materials. Novel and new series of bimetallic alkoxides has been prepared by metathesis route. They exhibit a lower sensitivity towards hydrolysis and so they are easier to handle as compared to other alkoxides. All the compounds were characterized by elemental analysis, FT-IR and multinuclear NMR spectroscopies. FT-IR revealed that the molecular structure of these metal alkoxides was retained to a large extent in 4 ： 1 halogenated alcohol-benzene solution. The heteronuclear NMR spectroscopy provided useful information about chemical shifts for better understanding the likely structure based on interactions with their coordinate metals. The mass spectra show similar types of fragmentation pattern. SEM-EDS analyses showed consistency with the formulation. XRD patterns show an enhanced homogeneity at high temperature. TGA measurements show that thermal decomposition occured in steps that depended entirely on the chemical compositions and the synthesis routes. SEM observation reveals that the morphology and particle size strongly depend on synthesis routes for their precursors.

关键词： precursor chemistry fluoro- or chloro-bimetallic alkoxide geometric design luminescent material

Semantic segmentation via pixel-to-center similarity calculation

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CAAI Transactions on Intelligence Technology 2024年第1期9卷 87-100页

作者： Dongyue Wu Zilin Guo Aoyan Li Changqian Yu Nong sang Changxin Gao National Key Laboratory of Science and Technology on Multispectral Information Processing School of Artificial Intelligence and AutomationHuazhong University of Science and TechnologyWuhanChina Meituan Inc. BeijingChina

Since the fully convolutional network has achieved great success in semantic segmentation,lots of works have been proposed to extract discriminative pixel ***,the authors observe that existing methods still suffer from two typical challenges:(i)The intra-class feature variation between different scenes may be large,leading to the difficulty in maintaining the consistency between same-class pixels from different scenes;(ii)The inter-class feature distinction in the same scene could be small,resulting in the limited performance to distinguish different classes in each *** authors first rethink se-mantic segmentation from a perspective of similarity between pixels and class *** weight vector of the segmentation head represents its corresponding semantic class in the whole dataset,which can be regarded as the embedding of the class ***,the pixel-wise classification amounts to computing similarity in the final feature space between pixels and the class *** this novel view,the authors propose a Class Center Similarity(CCS)layer to address the above-mentioned challenges by generating adaptive class centers conditioned on each scenes and supervising the similarities between class *** CCS layer utilises the Adaptive Class Center Module to generate class centers conditioned on each scene,which adapt the large intra-class variation between different *** designed Class Distance Loss(CD Loss)is introduced to control both inter-class and intra-class distances based on the predicted center-to-center and pixel-to-center ***,the CCS layer outputs the processed pixel-to-center similarity as the segmentation *** experiments demonstrate that our model performs favourably against the state-of-the-art methods.

关键词： computer vision deep neural networks image segmentation scene understanding

Thiazoloisoindigo-based Polymer Semiconductors: Synthesis,Structure-Property Relationship, Charge Carrier Polarity, and Field-Effect Transistor Performance

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Chinese Journal of Polymer Science 2024年第1期42卷 24-31,I0006页

作者： Bo-Wen Li Miao Xiong Mei-Hua Liu Zhi-Gao Li Long sang Zi-Han Xiong Biao Xiao Jian Pei Xiao-Bo Wan Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of EducationSchoolofOptoelectronic Materials&TechnologyJianghan UniversityWuhan430056China Bejing National Laboratoryfor Molecular Sciences the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

Developing new polymeric semiconductors with excellent device performance is essential for organic electronics. Herein, we synthesized two new thiazoloisoindigo(Tz ii)-based polymers, namely, P(Tz ii-d Th-d Th) and P(Tz ii-d Th-d Tz), by copolymerizing thiophene-flanked Tz ii with bithiophene and bithiazole, respectively. Owing to the more electron-deficient nature of bithiazole than bithiophene, P(Tz ii-d Th-d Tz)possesses deeper LUMO/HOMO levels of-3.45/-5.47 e V than P(Tz ii-d Th-d Th)(-3.34/-5.32 e V). The organic field-effect transistor(OFET) devices based on P(Tz ii-d Th-d Th) exhibited p-type behaviors with an average hole mobility value as high as 1.43 cm^(2)·V^(-1)·s^(-1), while P(Tz ii-d Th-d Tz)showed typical ambipolar characteristics with average hole and electron mobilities of 0.38 and 0.56 cm^(2)·V^(-1)·s^(-1). In addition, we compared the performances of both polymers with other Tz ii-based polymers reported in our previous work, and showed that the charge carrier polarity can be manipulated by adjusting the number of the thiophene units between the acceptor unit. As the increase of the number of thiophene rings,charge carrier polarity shifts from electron-dominated ambipolar transport to hole-dominated ambipolar transport and then to unipolar hole transport in OFETs, which provides an effective molecular design strategy for further optimization of polymer OFET performance.

关键词： Field-effect transistor Charge carrier polarity Thiazoloisoindigo

Facile synthesis of fully ordered L10-FePt nanoparticles with controlled Pt-shell thicknesses for electrocatalysis

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Nano Research 2017年第8期10卷 2866-2880页

作者： Yonghoon Hong Hee Jin Kim Daehee Yang Gaehang Lee Ki Min Nam Myung-Hwa Jung Young-Min Kim sang-ii Choi Won seok Seo Department of Chemistry Sogang University Seou104107 Republic of Korea Department of Chemistry and Green-Nano Materials Research Center Kyungpook National University Daegu 41566 Repubfic of Korea Korea Basic Science Institute and University of Science and Technology Daejeon 34133 Republic of Korea Department of Chemistry Mokpo National University Jeonnam 58554 Republic of Korea Department of Physics Sogang University Seoul 04107 Republic of Korea Center for Integrated Nanostructure Physics Institute for Basic Science (IBS) Suwon 16419 Repubfic of Korea Department of Energy Science Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea

We report a simple one-step approach for the synthesis of -4 nm uniform and fully L10-ordered face-centered tetragonal （fct） FePt nanoparticles （NPs） embedded in -60 nm MCM-41 （fct-FePt NPs@MCM-41）. We controlled the Pt-shell thickness of the fct-FePt NPs by treating the fct-FePt NPs@MCM-41 with acetic acid （HOAc） or hydrochloric acid （HC1） under sonicafion, thereby etching the surface Fe atoms of the NPs. The fct-FePt NPs deposited onto the carbon support （fct-FePt NP/C） were prepared by mixing the fct-FePt NPs@MCM-41 with carbon and subsequently removing the MCM-41 using NaOH. We also developed a facile method to synthesize acid-treated fct-FePt NP/C by using a HF solution for simultaneous surface-Fe etching and MCM-41 removal. We studied the effects of both surface-Fe etching and Pt-shell thickness on the electrocatalytic properties of fct-FePt NPs for the methanol oxidation reaction （MOR）. Compared with the non-treated fct-FePt NP/C catalyst, the HOAc-treated and HCl-treated catalysts exhibit up to 34% larger electrochemically active surface areas （ECASAs）; in addition, the HCl-treated fct-FePt NP （with -1.0 nm Pt shell）/C catalyst exhibits the highest specific activity. The HF-treated fct-FePt NP/C exhibits an ECASA almost 2 times larger than those of the other acid-treated fct-FePt NP/C catalysts and shows the highest mass activity （1,435 mA·mgPt^-1, 2.3 times higher than that of the commercial Pt/C catalyst） and stability among the catalysts tested. Our findings demonstrate that the surface-Fe etching for the generation of the Pt shell on fct-FePt NPs and the Pt-shell thickness can be factors for optimizing the electrocatalysis of the MOR.

关键词： FePt face centered tetragonal bimetallic methanol oxidation reaction electrocatalysts

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淠史杭灌区干旱推演及抗旱预案调控研究

中国农村水利水电 2024年第2期 15-22,30页

作者：燕乔程贝桑学锋杨鑫李阳三峡大学水利与环境学院湖北宜昌443002 中国水利水电科学研究院水资源所北京100038

水资源干旱是限制灌区可持续发展的关键因素。为提高灌区的干旱防治能力,使其更好的发挥其在节水、减灾方面的作用,以淠史杭灌区为研究区,通过划分水资源配置子单元和设置调蓄节点,采用公平性最优和供水缺水率最小作为目标函数,总量控... 详细信息

水资源干旱是限制灌区可持续发展的关键因素。为提高灌区的干旱防治能力,使其更好的发挥其在节水、减灾方面的作用,以淠史杭灌区为研究区,通过划分水资源配置子单元和设置调蓄节点,采用公平性最优和供水缺水率最小作为目标函数,总量控制、供水能力、分质供水等作为约束条件,采用基于精英策略的非支配遗传改进算法求解,构建区域General Water Allocation and Simulation Model(GWAS)模型;以2022年为现状基准年,与2023规划年组合,分为连续干旱与不连续干旱两大类,基于灌区水资源“应急干旱三次平衡”调控思想,分析灌区水资源在不同干旱情景下缺水的基础上,展开水资源抗旱配置研究,推演分析不同抗旱方案下水资源供需平衡情况。结果表明:连续干旱年中,灌区2023规划年在情景Ⅰ(P=90%)、情景Ⅱ(P=80%)来水频率下,各乡镇配置单元均存在不同程度的缺水情况,区域总缺水率分别为35.1%、20.8%;不连续干旱年中,2023规划年在情景Ⅲ(P=50%)来水频率下,模型基准配置水量基本可以满足区域各乡镇水量需求,区域总缺水率为5.9%。经不同抗旱方案尾部泵站补水、调整作物种植结构及外调水的优化配置后,三种情景下区域总缺水率最终都降为0%,优化后各配置单元供水改善效果显著。研究成果可为淠史杭灌区未来在应对不同干旱类型情景下水资源的合理调整提供技术支撑,并且可为实现该区域水资源统一管理和水量的统一调配提供理论依据。

关键词：淠史杭灌区水资源配置干旱推演预案 WAS模型

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Genetic variation of the PSCA gene(rs2294008) is not associated with the risk of prostate cancer

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The Journal of Biomedical Research 2017年第3期31卷 226-231页

作者： ii-seok Lee Sung Pil Seo Yun Sok Ha Pildu Jeong Ho Won Kang Won Tae Kim Yong-June Kim seok Joong Yun sang Cheol Lee Wun-Jae Kim Department of Urology Chungbuk National University College of Medicine Department of Urology School of MedicineKyungpook National University

Prostate stem cell antigen（PSCA） is a cell-membrane glycoprotein consisting of 123 amino acids and highly expressed in the prostate,but there have been few reports on the relationship between rs2294008 of PSCA and prostate cancer in the ***,we evaluated the association between rs2294008 and the risk of prostate cancer.A total of 240 prostate cancer patients and 306 controls（patients with benign prostatic hyperplasia） were *** analysis of rs2294008 of PSCA was performed using *** regression analysis was performed according to the genotype of PSCA *** found that CT and TT genotypes were associated with an insignificant risk of prostate cancer compared with the CC genotype（P= 0.627 and 0.397,respectively）.In addition,there was no significant difference in rs2294008 according to clinicopathological parameters,such as age,Gleason score,prostate-specific antigen（PSA）,stage,and metastasis in prostate cancer（P 〉 0.05 for each）.Age,Gleason score,PSA,pathologic stage,and metastasis did not modify the association between PSCA and the risk of prostate cancer（each P 〉 0.05 for each）.Taken together,the genetic polymorphism of PSCA rs2294008 was not associated with the risk of prostate *** results suggest that rs2294008 may not play a role in prostate carcinogenesis.

关键词： prostatic neoplasms polymorphism genetic risk prostate polymorphism single nucleotide

Seismic analysis of semi-gravity RC cantilever retaining wall with TDA backfill

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Frontiers of Earth Science 2017年第4期11卷 455-469页

作者： ii-sang AHN Lijuan CHENG Department of Civil and Environmental Engineering University of Alaska Fairbanks Fairbanks AK USA Department of Civil and EnvironmentalEngineering University of California Davis CA USA

The seismic behavior of Tire Derived Aggregate （TDA） used as backfill material of 6.10 m high retaining walls was investigated based on nonlinear time-history Finite Element Analysis （FEA）. The retaining walls were semi- gravity reinforced concrete cantilever type. In the backfill, a 2.74 m thick conventional soil layer was placed over a 3.06 m thick TDA layer. For comparison purpose, a conventional all soil-backfill model was also developed, and the analysis results from the two models under the Northridge and Takatori earthquakes were compared. The FEA results showed that both models did not experience major damage in the backfill under the Northridge earthquake. However, under the Takatori earthquake, the TDA-backfiU model developed substantially large displacement in the retaining walls and in the backfill compared with the soil-backfill model. Regions of large plastic strain were mainly formed in the TDA layer, and the soil over the TDA layer did not experience such large plastic strain, suggesting less damage than the soil-backfill model. In addition, the acceleration on the backfill surface of the TDA-backfill model decreased substantially compared with the soil-backfill model. If an acceleration sensitive structure is placed on the surface of the backfill, the TDA backfill may induce less damage to it.

关键词： TDA (Tire Derived Aggregate) scrap tires retaining wall seismic analysis Finite Element Analysis

茜素-Al(Ⅲ)络合物制备及对涤纶针织物的染色

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针织工业 2024年第1期 62-66页

作者：桑雨蒙张子琪欧卫国张瑞萍南通大学纺织服装学院江苏南通226019 南通金仕达高精实业股份有限公司江苏南通226019

为缩短染色流程,制备茜素-Al(Ⅲ)络合染料,采用紫外-可见和红外光谱对络合物进行表征,分析茜素-Al(Ⅲ)络合染料用于涤纶针织物的染色效果,并与同媒染色工艺对比。结果表明:茜素-Al(Ⅲ)络合染料制备的优化工艺参数为:n(茜素)∶n(Al^(3+)... 详细信息

为缩短染色流程,制备茜素-Al(Ⅲ)络合染料,采用紫外-可见和红外光谱对络合物进行表征,分析茜素-Al(Ⅲ)络合染料用于涤纶针织物的染色效果,并与同媒染色工艺对比。结果表明:茜素-Al(Ⅲ)络合染料制备的优化工艺参数为:n(茜素)∶n(Al^(3+))=2∶1,pH值为5.00,反应温度40℃,时间30 min;当染色pH值为3.00时,络合染料染色的黄色谱涤纶织物K/S值增加了81.69%;当染色pH值为9.00时,络合染料染色的红色谱涤纶织物染色K/S值增加了11.72%;茜素-Al(Ⅲ)络合染料染色涤纶织物的耐干摩擦色牢度3级以上,耐湿摩擦色牢度2~3级以上,耐皂洗变色牢度4~5级。

关键词：茜素茜素-Al(Ⅲ)络合染料染色涤纶针织物

Comparison of Minimal Skin Incision Technique in Living Kidney Transplantation and Conventional Kidney Transplantation

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Chinese Medical Journal 2016年第8期129卷 917-921页

作者： sang-Dong Kim Ji-ii Kim In-Sung Moon Sun-Cheol Park Department of Surgery Division of Vascular and Transplant Surgery College of Medicine The Catholic University of Korea Seoul 137-040 Korea

Background：Recently,the most common incision for kidney transplantation （KT） is an inverted J-shaped incision known as the ＆quot;hockey-stick.＆quot; However,demands for minimally invasive surgery in KT are increasing as in other various fields of ***,we evaluated whether there is difference between minimal skin incision technique in kidney transplantation （MIKT） and conventional KT （CKT）.Methods：Between June 2006 and March 2013,a total of 452 living kidney transplant patients were *** MIKT group included 17 young unmarried women whose body mass index was 〈25 kg/m^2 and had no anatomic *** CKT group included 435 *** MIKT operation technique restricted to the 10 cm-sized skin incision in the lower right abdomen from laterally below the anterior superior iliac spine to the midline just above the pubis was *** compared the baseline clinical characteristics and postoperative results between two *** proper comparison,propensity score matching was ***：There was no difference in graft function,survival,and postoperative complication rate between MIKT and CKT groups （all P 〉 0.05）.The 5-year graft survival was 92.3% and 85.7% in MIKT and CKT groups,respectively （P =0.786）.Conclusions：Our results indicated that MIKT showed more favorable cosmetic results,and there were no statistical differences in various postoperative factors including graft function,survival,and complications compared with ***,we suggested that MIKT is an appropriate method for selected patients in living KT.

关键词： Kidney Transplantation Minimal Skin Incision: Conventional Kidney Transplantation

4-Hydroxycinnamic acid attenuates neuronal cell death by inducing expression of plasma membrane redox enzymes and improving mitochondrial functions

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Food Science and Human Wellness 2023年第4期12卷 1287-1299页

作者： Sujin Park YoonA Kim Jaewang Lee Hyunsoo Seo sang-Jip Nam Dong-Gyu Jo Dong-Hoon Hyun Department of Life Science Ewha Womans UniversitySeoul 03760South Korea Department of Chemistry and Nano Science Ewha Womans UniversitySeoul 03760South Korea School of Pharmacy Sungkyunkwan UniversitySuwon 16419South Korea

Many approaches to neurodegenerative diseases that focus on amyloid-βclearance and gene therapy have not been *** therapeutic applications focus on enhancing neuronal cell survival during the pathogenesis of neurodegenerative diseases,including mitochondrial *** membrane(PM)redox enzymes are crucial in maintaining cellular physiology and redox homeostasis in response to mitochondrial *** phytochemicals are known to induce the expression of detoxifying enzymes under stress *** this study,mechanisms of neuroprotective effects of 4-hydroxycinnamic acid(HCA)were examined by analyzing cell survival,levels of abnormal proteins,and mitochondrial functions in two different neuronal *** protected two neuronal cells exhibited high expression of PM redox enzymes and the consequent increase in the NAD^(+)/NADH *** cultured with HCA showed delayed apoptosis and decreased oxidative/nitrative damage accompanied by decreased ROS production in the *** increased the mitochondrial complexes I and ii activities and ATP ***,HCA increased mitochondrial fusion and decreased mitochondrial ***,HCA maintains redox homeostasis and energy metabolism under oxidative/metabolic stress *** findings suggest that HCA could be a promising therapeutic approach for neurodegenerative diseases.

关键词： NADH-quinone oxidoreductase 1(NQO1) Cytochrome b5 reductase 4-Hydroxycinnamic acid Neuroprotection Improved mitochondrial functions