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UranyI Phosphonates with Multiple UranyI Coordination Geometries and Low Temperature Phase Transition

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Chinese Journal of Chemistry 2021年第3期39卷 597-604页

作者： Lanhua Chen Yugang Zhang Zhehui Weng Zhiyong Liu Jiarong Zhang yaxing wang Shuao wang State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collabora-tive Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhouJiangsu 215123China Department of Chemical Science and Technology Kunming UniversityYunnanKunming 650214China

Main observation and conclusion Two new uranium(VI)phosphonate compounds,namely K_(8)[N(C_(2)H_(5))_(4)]_(2)(UO_(2))_(17)(H_(2)O)_(4)[CH_(2)(PO_(3))_(2)]_(8)[CH_(2)(PO_(3))(PO_(3)H)]_(4)·16(H_(2)O)(1)and[N(C_(2)H_(5))_(4)]_(4)(H_(3)O)_(2)(UO_(2))_(10)[CH_(2)(PO_(3))_(2)]_(5)[CH_(2)(PO_(3))(PO_(3)H)]_(2)·10H_(2)O(2),have been synthesized under mild hydro/solvothermal *** structural analysis of the two compounds reveals that they both contain all three typical coordination geometries of the U(VI)ions,including UO;tetragonal,UO,pentagonal,and UOg hexagonal ***,compound 1 displays a tempera-ture-induced single crystal to single crystal phase transformation as confirmed by the Single-crystal X-ray diffraction data collected at different ***-dependent fluorescence spectra presented herein illustrate the perturbation of the electronic structure of uranyl centers.

关键词： Uranium(VI)Phosphonate compounds Multiple coordination geometries Low temperature phase transition Coordination chemistry Fluorescence spectroscopy

Guided-YNet: Saliency Feature-Guided Interactive Feature Enhancement Lung Tumor Segmentation Network

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Computers, Materials & Continua 2024年第9期80卷 4813-4832页

作者： Tao Zhou Yunfeng Pan Huiling Lu Pei Dang Yujie Guo yaxing wang School of Computer Science and Engineering North Minzu UniversityYinchuan750021China School of Medical Information&Engineering Ningxia Medical UniversityYinchuan750004China Key Laboratory of Image and Graphics Intelligent Processing of State Ethnic Affairs Commission NorthMinzuUniversityYinchuan750021China

Multimodal lung tumor medical images can provide anatomical and functional information for the same *** as Positron Emission Computed Tomography(PET),Computed Tomography(CT),and *** to utilize the lesion anatomical and functional information effectively and improve the network segmentation performance are key *** solve the problem,the Saliency Feature-Guided Interactive Feature Enhancement Lung Tumor Segmentation Network(Guide-YNet)is proposed in this ***,a double-encoder single-decoder U-Net is used as the backbone in this model,a single-coder single-decoder U-Net is used to generate the saliency guided feature using PET image and transmit it into the skip connection of the backbone,and the high sensitivity of PET images to tumors is used to guide the network to accurately locate ***,a Cross Scale Feature Enhancement Module(CSFEM)is designed to extract multi-scale fusion features after ***,a Cross-Layer Interactive Feature Enhancement Module(CIFEM)is designed in the encoder to enhance the spatial position information and semantic ***,a Cross-Dimension Cross-Layer Feature Enhancement Module(CCFEM)is proposed in the decoder,which effectively extractsmultimodal image features through global attention and multi-dimension local *** proposed method is verified on the lung multimodal medical image datasets,and the results showthat theMean Intersection overUnion(MIoU),Accuracy(Acc),Dice Similarity Coefficient(Dice),Volumetric overlap error(Voe),Relative volume difference(Rvd)of the proposed method on lung lesion segmentation are 87.27%,93.08%,97.77%,95.92%,89.28%,and 88.68%,*** is of great significance for computer-aided diagnosis.

关键词： Medical image segmentation U-Net saliency feature guidance cross-modal feature enhancement cross-dimension feature enhancement

Analysis on nursing competence and training needs of dementia caregivers in long-term care institutions

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International Journal of Nursing Sciences 2020年第2期7卷 198-205页

作者： yaxing wang Yuqi Liu Junxiang Tian Mengya Jing Kesen Zhang School of Nursing Tianjin University of Traditional Chinese MedicineTianjinChina Tianjin Nursing Society TianjinChina

Objective:It is aimed to investigate the nursing competence and corresponding influence factors of dementia caregivers in long-term care institutions of Tianjin and identify the training needs of ***:In the cross-section survey of this study,246 dementia caregivers were selected from 6 long-term care institutions in Tianjin as objects of study through convenient ***:The scores for nursing competence of dementia caregivers were 140.28±7.73,at a moderate *** findings that nursing competence of dementia caregivers were positively associated with the work experience(β=0.115,P=0.005),educational level(β=0.333,P<0.01),pervdceived health status(β=0.108,P=0.003)and training times within 1 year(β=0.371,P<0.01).Through the analysis,it is found that the training needs of dementia caregivers are inconsistent with the current situation in terms of content,methods and *** are some problems in the training,such as unreasonable time,single mode and not deepening the understanding of the elderly with ***:Long term care institutions shall arrange training no less than 12 times a year and evaluate training needs regularly to improve training *** online and offline training and adding more specialized contents like case analysis,employing experts in the field of dementia to teach courses.

关键词： Caregivers Dementia Nursing homes Professional competence Training

A uranyl based coordination polymer showing response to low-dosage ionizing radiations down to 10^(−5) Gy

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Science China Chemistry 2020年第11期63卷 1608-1612页

作者： Jian Xie yaxing wang Wei Liu Chengyu Liang Yugang Zhang Lanhua Chen Daopeng Sheng Zhifang Chai Shuao wang School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow UniversitySuzhou 215123China School of Environment and Material Engineering Yantai UniversityYantai 264005China

Radiation detection material is a central component of nuclear technology finding applications in many critical *** a highly radiation-sensitive material that shows a facilely detectable response to ultra-low dosage of radiation is a long-term research target and remains to be a *** reported most optimal chemical radiation dosimeter can detect low-dosage X-andγ-ray radiations down to 10^(−4) *** document here a new photoresponsive coordination polymer showing upgraded radiation detection capabilities with the detection limit on the radiation dose one order of magnitude lower than the previous *** radiation induced photoluminescence quenching process was elucidated by multiple spectroscopic characterizations.

关键词： uranium photoluniinescence radiation detection dosimeter

A Trivalent Americium Organic Framework with Decent Structural Stability against Self-Irradiation

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Chinese Journal of Chemistry 2022年第7期40卷 801-805页

作者： Yugang Zhang Kai Li Sida Zhang Xia wang Hailong Zhang Yanlong wang yaxing wang Zhifang Chai Shuao wang State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySoochowJiangsu 215123China

We reported the synthesis,single crystal structure,and solid-state UV-Vis-NIR spectroscopy of a new transplutonium metal-organic framework(MOFs),Am(H_(2)O)[PO[(C6H4)COO]_(3)],denoted as AmTPO(TPO=tris(4-carboxylphenyl)-phosphineoxide).AmTPO forms a three-dimensional metal-organic framework structure with americium dimers as the secondary building *** 5f→5f transi-tions attributed to trivalent americium was observed in the absorption spectrum of AmTPO ranging from 300 to 1200 ***,AmTPO can maintain the crystallinity with no observable structural degradation within several months after being synthesized,re-vealing a long-term radiation resistance of this structure and the potential application of MOFs as a platform for nuclear waste dis-posal.

关键词： Metal-organic Frameworks Transplutonium Americium Radiochemistry Actinides

A Tetravalent Plutonium Organic Framework Containing[Pu_(2)O_(16)]Dimers as Secondary Building Units:Synthesis,Structure,and Radiation Stability

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Chinese Journal of Chemistry 2023年第13期41卷 1552-1556页

作者： Yugang Zhang Yingzhe Du Lili Li Ye Tao Kai Li Hailong Zhang Yanlong wang Lanhua Chen yaxing wang Zhifang Chai Shuao wang State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhouJiangsu215123 China China Nuclear Power Technology Research Institute Co. Ltd.ShenzhenGuangdong518028 China

The second example of tetravalent plutonium carboxyl-based organic framework,^(242)Pu(OH)[PO[(C_(6)H_(4))COO]_(3)]·H_(2)O,termed as PuTPO(TPO=tris(4-carboxylphenyl)-phosphineoxide),was reported in this work.A series of characterizations of PuTPO,such as X-ray crystallography and solid-state UV-Vis-NIR spectroscopy,were carried out to expatiate its structure and physicochemical *** is constructed by dimers of the plutonium-oxygen subunit of[Pu_(2)O_(16)].Characteristic peaks located at approximately 1100 nm can be considered to be the fingerprint peaks of tetravalent *** PuTPO can maintain high crystallinity within several months after synthesis,it exhibits a radiation-induced swelling effect probed by the expansion of cell parameter of b axis after self-irradiation fromα-decay of ^(242)*** result enriches the inventory of tetravalent plutonium compounds and provides an insight into the irradiation resistance of metal-organic frameworks.

关键词： Metal-organic frameworks Plutonium Actinides Crystal structure Coordination chemistry

Efficient separation between trivalent americium and lanthanides enabled by a phenanthroline-based polymeric organic framework

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Chinese Chemical Letters 2022年第7期33卷 3429-3434页

作者： Afshin Khayambashi Long Chen Xue Dong Kai Li Zhipeng wang Linwei He Suresh Annam Lixi Chen yaxing wang Matthew V.Sheridan Chao Xu Shuao wang State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China

Separation of the minor actinides(Am and Cm)from lanthanides in high-level liquid wastes(HLLW)is one of the most challenging chemical separation tasks known owing to their chemical similarities and is highly significant in nuclear fuel reprocessing plants because it could practically lead to sustainable nuclear energy by closing the nuclear fuel *** solid phase extraction is proposed to be a possible strategy but all reported sorbent materials severely suffer from limited stability and/or efficiency caused by the harsh conditions of high acidity coupled with intense ***,a phenanthroline-based polymeric organic framework(PhenTAPB-POF)was designed and tested for the separation of trivalent americium from lanthanides for the first *** to its fully conjugated structure,PhenTAPB-POF exhibits previously unachieved stability under the combined extreme conditions of strong acids and high irradiation *** americium partitioning experiment indicates that PhenTAPB-POF possesses an ultrahigh adsorption selectivity towards Am(Ⅲ)over lanthanides(e.g.,SFAm(Ⅲ)/Eu(Ⅲ)=3326)in highly acidic simulated HLLW and relatively fast adsorption kinetics in both static and dynamic ***(Ⅲ)can be almost quantitatively eluted from the PhenTAPB-POF packed-column using a concentrated nitric acid *** high stability and superior separation performance endow PhenTAPB-POF with the promising alternative for separating minor actinides over lanthanides from highly acidic HLLW streams.

关键词： Porous organic framework Americium Lanthanides Separation Stability

Competing Crystallization between Lanthanide and Actinide in Acidic Solution Leading to Their Efficient Separation

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Chinese Journal of Chemistry 2019年第1期37卷 53-57页

作者： Xuemiao Yin yaxing wang Xiaoyan Li Jian Xie Mark A.Silver Lanhua Chen Daopeng Sheng Guoxun Ji Zhifang Chai Shuao wang State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences (RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow University199 Ren'ai RoadSuzhou.liangsu 215123China Xi'an Research Institute of High Technology Hong Qing TownXi'anShaanxi 710025China

Summary of main observation and conclusion We present a new method for generating europium oxalate compounds by decomposing of N-methyl 2-pyrrolidone in HNO3 *** reaction exhibits high selectivity towards Eu^3+ over UO2^2+,which suggests that these conditions could be applied to a selective crystallization based separation system for trivalent lanthanides and hexavalent actinides.

关键词： method system actinides

Top Executive Turnover and Finn Performance Evidence From China

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Journal of Modern Accounting and Auditing 2012年第9期8卷 1346-1352页

作者： Ye Ling wang yaxing Nanjing University Nanjing China

By using the data of the listed companies in Shanghai and Shenzhen stock market---a share market as a sample from 2003 to 2007 to analyze the relationship between corporation performance and top executive alteration, different succession modes get different efficiency. The result shows that： The decline of company performance will cause the top executive turnover, and that the possibility of top executive turnover in non-state-owned listed companies is higher than that of the state-owned companies. In the routine turnover sample, the performance level of the internal succession is better than that of the external succession. In the non-routine turnover sample, the results are reversed. For further analysis, the main sources of the improvement for performance are items of below-the-line and non-recurring profit and loss, rather than the company＇s operating revenue.

关键词： top executive turnover nature of property right succession mode company performance