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Engineering 2019年第4期5卷 768-776页

作者： Hongbin Cao He Zhao Di Zhang Chenming Liu xiao Lin Yuping Li Pengge Ning Jiajun Sun Yi Zhang zhi Sun Beijing Engineering Research Center of Process Pollution Control and National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Division of Environment Technology and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China

In this research,a methodology named whole-process pollution control(WPPC)is demonstrated that improves the effectiveness of process *** methodology considers waste/emission treatment as a step of the whole production process with respect to the minimization of cost and environmental impact for the whole *** following procedures are introduced in a WPPC process optimization:①a material and energy flow investigation and optimization based on a systematic understanding of the distribution and physiochemical properties of potential pollutants;②a process optimization to increase the utilization efficiency of different elements and minimize pollutant emissions;and③an evaluation to reveal the effectiveness of the optimization *** production of ammonium paratungstate was chosen for the case *** factors of the different optimization schemes-namely the cost-effectiveness factor and the environmental impact indicator-were evaluated and *** research demonstrates that by considering the nature of potential pollutants,technological innovations,economic viability,environmental impacts,and regulation requirements,WPPC can efficiently optimize a metal production process.

关键词： Whole-process pollution control Process optimization Industrial pollution Tungsten

Preparation of water-soluble tantalum nanoparticles and their radiosensitization application

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Tungsten 2024年第4期6卷 748-758页

作者： Wang Zhang Shuang-Long Du zhi-Guo Zhang Tao Wang Chun-jian Su Xing-Hua Dong Shuang Zhu Zhan-Jun Gu College of Mechanical and Electronic Engineering Shandong University of Science and TechnologyQingdao266590China CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety Institute of High Energy PhysicsChinese Academy of ScienceBeijing100049China GBA Research Innovation Institute for Nanotechnology Guangzhou510000China CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology of ChinaChinese Academy of SciencesBeijing100190China

Radiation therapy(RT)that utilizes high dose of ionizing radiation to kill tumor cells is a common cancer treatment ***,the effectiveness of RT is limited by the tolerance of normal tissue surrounding the *** high atom number(Z)element-based radio sensitizers to increase energy deposit inside tumor cells can achieve better carcinoma *** nanoparticles(Ta NPs)exhibit good radiotherapy sensitization ***,achieving the water solubility of Ta NPs is *** study reported a mechanochemical method for obtaining Ta NPs modified with sodium hexametaphosphate(SHMP)for radiotherapy sensitization *** results showed that the water solubility of Ta NPs modified with SHMP was significantly *** biocompatibility and radio sensitizing ability are also verified at both cellular and animal levels.

关键词： Tantalum nanoparticles Sodium hexametaphosphate Mechanochemical method Radiotherapy sensitization

Position-sensitive plastic scintillator detector with WLS-fiber readout

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Nuclear Science and Techniques 2018年第8期29卷 186-192页

作者： Jia-Ning Dong Yun-Long Zhang zhi-Yong Zhang Dong Liu Zi-Zong Xu xiao-Lian Wang Shu-Bin Liu State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Department of Physics University of Science and Technology of China Department of Modern Physics University of Science and Technology of China

In this paper,the design,construction,simulation,and performance of a position-sensitive plastic scintillator detector are *** readout of the detector uses wavelength-shifting fibers coupled with multi-anode photomultipliers(PMTs) for the x-and *** calibrating the multi-anode PMTs,a two-dimensional projection image of the square scintillator telescope hit by cosmic muons is *** performing a cosmic test with the Micromegas telescope,the position resolution of the detector was determined to reach approximately8.6 mm,which is close to the value obtained in physical simulation.

关键词：闪烁器纤维结位置塑料敏感读出 WLS 光电倍增管

Synthesis, Structure and Highly Enhanced Phosphorescence of a Cadmium (Ⅱ) Coordination Polymer Assembled with 1,4-Naphthalenedicarboxylic Acid and 2-Propylimidazole

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Chinese Journal of Structural Chemistry 2021年第2期40卷 187-192,146页

作者： CHANG Xin-Hong YANG xiao-Gang ZHAI zhi-Min CHEN Jia-Yi LI Fei-Fei College of Chemistry and Chemical Engineering Luoyang Normal UniversityLuoyang 471934China College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454000China

One cadmium(Ⅱ)coordination polymer[Cd(1,4-NDC)(PPIM)_(2)]_(n)(1,1,4-H_(2)NDC=1,4-na-phthalenedicarboxylic acid,PPIM=2-propylimidazole),has been synthesized under hydrothermal conditions and structurally characterized by elemental analysis,TGA and X-ray single-crystal *** 1 crystallizes in monoclinic with space group P2_(1)/n,a=8.8292(2),b=16.6936(4),c=16.7869(4)Å,β=99.701(2)°,V=2438.86(10)Å^(3),Z=4,Dc=1.489 Mg/m^(3),F(000)=1112,μ=0.932 mm^(–1),S=1.076,the final R=0.0360 and wR=*** 1,the 1,4-NDC ligand bridges the Cd(Ⅱ)to form a 1D infinite chain,which are connected through N–H···O hydrogen bond to form a 2D layer then to an overall 3D supramolecular *** time-resolved measurements indicate that 1 shows highly prolonged phosphorescent lifetime about 452 times in comparison with that of pristine PPIM ***-crystal analysis and theory calculations indicate that strong coordination bonds and complete separation of HOMOs and LUMOs in the rigid matrix of 1 promote the long-last phosphorescence emission.

关键词： coordination polymer crystal structure room temperature phosphorescence theory calculations

Physiological changes and expression characteristics of ZIP family genes under zinc def iciency in navel orange(Citrus sinensis)

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Journal of Integrative Agriculture 2016年第4期15卷 803-811页

作者： XING Fei FU Xing-zheng WANG Nan-qi XI jian-long HUANG Yi ZHOU Wei LING Li-li PENG Liang-zhi Citrus Research Institute Southwest University College of Horticulture and Landscape Southwest University

Zinc （Zn） deficiency is widespread among citrus plants, but information about the mechanisms for Zn deficiency response in these plants is scarce. In the present study, different navel orange （Citrus sinensis （L.） Osbeck） leaves with various yellowing levels were sampled in our experimental orchard, and upon estimation of nutrient contents, Zn deficiencies were diagnosed as mild, moderate, and severe. Further analysis of chlorophyll content, photosynthetic characteristics, antioxidant enzyme activities, and expression levels of Zn/Iron-regulated transporter-like protein （ZIP） family genes were conducted in the sampled Zn-deficient leaves. The results showed that chlorophyll contents and net photosynthetic rate （Pn） seemed to decrease with reduced Zn contents. In addition, comparison of severe Zn-deficient and normal leaves revealed that activities of peroxidase （POD） and catalase （CAT） increased significantly, whereas that of Zn-containing enzymes such as Cu/Zn superoxide dismutase （Cu/Zn-SOD） significantly reduced with decreasing Zn contents. As expected, expression of the ZIP family genes, ZIP1, ZIP3, and ZIP4, was induced by Zn deficiencies. These results deepen our understanding of Zn deficiency in citrus plants as well as provide useful preliminary information for further research.

关键词： navel orange Zn deficiency physiological changes ZIP family gene expression

A study on the pathogen species and physiological races of tomato Fusarium wilt in Shanxi,China

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Journal of Integrative Agriculture 2018年第6期17卷 1380-1390页

作者： CHANG Yin-dong DU Bin WANG Ling JI Pei XIE Yu-jie LI Xin-feng LI zhi-gang WANG jian-ming College of Agriculture Shanxi Agricultural University Department of Horticulture Taiyuan University Technology Center Yuncheng Sub-Center Shanxi Entry-Exit Inspection and Quarantine Bureau Department of Genetics and Biochemistry Clemson University

In order to clarify the main pathogens of tomato Fusarium wilt in Shanxi Province, China, morphological identification, elongation factor 1 alpha （EF-1α） sequence analysis, specific primer amplification and pathogenicity tests were applied to study the isolates which were recovered from diseased plants collected from 17 different districts of Shanxi Province. The results were as follows： 1） Through morphological and molecular identification, the following 7 species of Fusarium were identified： F. oxysporum, F. solani, F. verticillioides, F. subglutinans, F. chlamydosporum, F. sporotrichioides, and F. semitectum; 2） 56 isolates of F. oxysporum were identified using specific primer amplification, among which, 29, 5 and 6 isolates were respectively identified as F. oxysporum f. sp. lycopersici physiological race 1, race 2, and race 3; 3） pathogenicity test indicated the significant pathogenicity of F. oxysporum, F. solani, F. verticillioides, and F. subglutinans to tomato plant. Therefore, among these 4 species confirmed as pathogenic to tomato in Shanxi, the highest isolation rate （53.3％） corresponded to F. oxysporum. Three physiological species, race 1, race 2, and race 3 of F. oxysporum f. sp. lycopersici are detected in Shanxi, among which race 1 is the most widespread pathogen and is also considered as the predominant race.

关键词： tomato Fusarium wilt Fusarium oxysporum f. sp. lycopersici physiological races EF-1α sequence analysis specific primer amplification

The contribution of the first forbidden transitions to the nuclear β^--decay half-life

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Chinese Physics C 2019年第11期43卷 91-99页

作者： Ji-Lin You xiao-Ping Zhang Qi-Jun zhi Zhong-Zhou Ren Qing-Dong Wu School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao 999078China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550001China School of Physics Science and Engineering Tongji UniversityShanghai 200092China

β-decay half-life is a key quantity for nuclear structure and nucleosynthesis *** exist large uncertainties in the contributions of allowed and forbidden transitions to the totalβ-decay life,which limits the resolution of the predictedβ-decay *** systematically study the contribution of the first forbidden(FF)transitions to theβ--decay half-life,and quantify it with a formula based on simple physics *** also propose a new formula for calculation of theβ--decay half-life that includes the FF *** is shown that the inclusion of the contribution of FF transitions significantly improves the precision of calculations of theβ--decay *** fitting of the RQRPA results for neutron-rich Z=47,57 isotopes and N=80,94 isotones,the formula for the contribution of the FF transitions gives similar results as the RQRPA ***,because of limited experimental data for the branching ratios of unstable nuclei,the fit parameters are not fully ***,the proposed formula for theβ--decay half-life is more suitable for calculations of half-lives than of the FF *** formula could be used to predict theβ?-decay half-life in nuclear structure studies as well as nucleosynthesis calculations in stars.

关键词： β^--decay half-life nucleosynthesis first forbidden transitions branching ratios

Epidemiological Surveillance: Genetic Diversity of Rotavirus Group A in the Pearl River Delta, Guangdong, China in 2019

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Biomedical and Environmental Sciences 2024年第3期37卷 278-293页

作者： jianG Jie Ying LIANG Dan WANG Li xiao Yun LIANG Yu Feng KE Bi Xia SU Juan xiao Hong WANG Tao ZOU Min LI Hong jian KE Chang Wen School of Public Health Shantou UniversityShantou 515063GuangdongChina Guangdong Provincial Center for Disease Control and Prevention Guangdong Workstation for Emerging Infectious Disease Control and PreventionGuangzhou 511430GuangdongChina Guangdong Provincial Key Laboratory of Virology Institute of Medical MicrobiologyJinan UniversityGuangzhou 510632GuangdongChina School of Public Health Sun Yat-sen UniversityGuangzhou 510275GuangdongChina School of Public Health Southern Medical UniversityGuangzhou 510515GuangdongChina Shantou University Medical College Shantou 515041GuangdongChina

Objective This study aimed to understand the epidemic status and phylogenetic relationships of rotavirus group A(RVA)in the Pearl River Delta region of Guangdong Province,*** This study included individuals aged 28 days–85 years.A total of 706 stool samples from patients with acute gastroenteritis collected between January 2019 and January 2020 were analyzed for 17 causative pathogens,including RVA,using a Gastrointestinal Pathogen Panel,followed by genotyping,virus isolation,and complete sequencing to assess the genetic diversity of *** The overall RVA infection rate was 14.59%(103/706),with an irregular epidemiological *** proportion of co-infection with RVA and other pathogens was 39.81%(41/103).Acute gastroenteritis is highly prevalent in young children aged 0–1 year,and RVA is the key pathogen circulating in patients 6–10 months of age with diarrhea.G9P[8](58.25%,60/103)was found to be the predominant genotype in the RVA strains,and the 41 RVA-positive strains that were successfully sequenced belonged to three different RVA genotypes in the phylogenetic *** analysis showed that gene reassortment events,selection pressure,codon usage bias,gene polymorphism,and post-translational modifications(PTMs)occurred in the G9P[8]and G3P[8]*** This study provides molecular evidence of RVA prevalence in the Pearl River Delta region of China,further enriching the existing information on its genetics and evolutionary characteristics and suggesting the emergence of genetic *** the surveillance of genotypic changes and gene reassortment in RVA strains is essential for further research and a better understanding of strain variations for further vaccine development.

关键词： Infectious diarrheal disease Rotavirus Phylogenetic analysis Gene rearrangement Codon usage bias Genetic diversity

一类逼近容量LDPC纠删码的二部图构造算法

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西安电子科技大学学报 2010年第4期37卷 705-709页

作者：慕建君焦晓鹏曹训志西安电子科技大学计算机学院陕西西安710071 西南交通大学信息编码与传输四川省重点实验室四川成都610031 西安电子科技大学综合业务网理论及关键技术国家重点实验室陕西西安710071

Tornado码是一类重要的LDPC码.证明了Heavy-Tail/Poisson度序列可逼近删除信道容量.提出了Tornado码设计中随机二部图的连边构造算法.通过分析Heavy-Tail/Poisson度序列的分布,提出了设计Tornado码的一个参数选取原则.仿真实验证明了这... 详细信息

Tornado码是一类重要的LDPC码.证明了Heavy-Tail/Poisson度序列可逼近删除信道容量.提出了Tornado码设计中随机二部图的连边构造算法.通过分析Heavy-Tail/Poisson度序列的分布,提出了设计Tornado码的一个参数选取原则.仿真实验证明了这一选取原则的合理性.随机二部图的连边构造算法及其参数选取原则有助于Tornado码的设计及其工程应用.

关键词： LDPC码 Tornado码逼近容量序列二部图构造算法

Modeling, Simulation and Analysis of Thermal Resistance in Multi-finger AlGaN/GaN HEMTs on SiC Substrates

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Chinese Physics Letters 2012年第8期29卷 279-283页

作者： WANG jian-Hui WANG Xin-Hua PANG Lei CHEN xiao-Juan LIU Xin-Yu Key Laboratory of Microelectronics Device&Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029

The effects of varying layout geometries and various thermal boundary resistances(TBRs)on the thermal resistance of multi-finger AlGaN/GaN HEMTs are thoroughly investigated using a combination of a two-dimensional electro-thermal model coupled with the three-dimensional thermal *** measurement using micro-Raman thermography is performed to verify and enhance the accuracy of the thermal *** results indicate that thermal resistance weakly depends on the layout design because of the high thermal conductivity of ***,the analysis reveals that optimizing the TBR of the device could efficiently reduce the thermal resistance since TBR takes a significant proportion of the total thermal resistance.

关键词： AlGaN/GaN HEMTs Simulation