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Verification of neutron-induced fission product yields evaluated by a tensor decompsition model in transport-burnup simulations

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Nuclear Science and Techniques 2023年第2期34卷 190-201页

作者： Qu‑Fei song long Zhu Hui Guo Jun Su School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

Neutron-induced fission is an important research object in basic ***,its product yield data are an indispensable nuclear data basis in nuclear engineering and *** fission yield tensor decomposition(FYTD)model has been developed and used to evaluate the independent fission product *** general,fission yield data are verified by the direct comparison of experimental and evaluated ***,such direct comparison cannot reflect the impact of the evaluated data on application scenarios,such as reactor transport-burnup ***,this study applies the evaluated fission yield data in transport-burnup simulation to verify their accuracy and possibility of ***,the evaluated yield data of235U and239Pu are applied in the transport-burnup simulation of a pressurized water reactor(PWR)and sodium-cooled fast reactor(SFR)for *** the reactor operation stage,the errors in pin-cell reactivity caused by the evaluated fission yield do not exceed 500 and 200 pcm for the PWR and SFR,*** errors in decay heat and135Xe and149Sm concentrations during the short-term shutdown of the PWR are all less than 1%;the errors in decay heat and activity of the spent fuel of the PWR and SFR during the temporary storage stage are all less than 2%.For the PWR,the errors in important nuclide concentrations in spent fuel,such as90Sr,137Cs,85Kr,and99Tc,are all less than 6%,and a larger error of 37%is observed *** the SFR,the concentration errors of ten important nuclides in spent fuel are all less than 16%.A comparison of various aspects reveals that the transport-burnup simulation results using the FYTD model evaluation have little difference compared with the reference results using ENDF/B-Ⅷ.0 *** proves that the evaluation of the FYTD model may have application value in reactor physical analysis.

关键词： Fission product yield Tensor decomposition Transport-burnup simulation Machine learning

Comparison of patients by family history with gastric and non-gastric cancer

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World Journal of Gastroenterology 2009年第21期15卷 2644-2650页

作者： Xue-Fu Zhou Yu-long He Wu song Jian-Jun peng Chang-Hua Zhang Wen Li Hui Wu Department of Gastrointestinal Surgery The First Affiliated Hospital Sun Yat-Sen University Guangzhou 510080 Guangdong Province China

AIM:To compare the gastric cancer(GC) patients by their family history with gastric and ***:Positive family histories within seconddegree relatives and clinicopathological features were obtained for 256 ***:Of the 256 probands,112(76 male,36 female) were incorporated into familial GC(FGC) group:at least two GC members;144(98 male,46 female) were included in the non-FGC group(relatives only affected with non-GCs).Of 399 tumors in relatives(181 from FGC against 212 from non-FGC),GC was the most frequent,followed by esophageal,hepatocellular,and colorectal *** cancer was next to lung cancer but prior to breast and urogenital *** affected members aggregated within first-degree relatives(FGC:66 siblings,48 fathers,31 mothers,four offspring;non-FGC:56 fathers,55 siblings,43 mothers,and 15 offspring).The ratio of males to females in affected first-degree relatives was usually higher in male *** history of GC was a slight risk for GC in males(OR = 1.19,95% CI:0.53-2.69),while risk of GC by maternal history of non-GCs was increased in females(OR = 0.46,95% CI:0.22-0.97).Diffuse-GC was the major histological type in all *** in tumor sites between thetwo groups was derived from an excess of upper sites in non-FGC female ***:Distribution of associated non-GCs in a family history of GC may vary with geographic *** may have different genetic and/or environmental etiology in different families,and a certain subtype may be inherited in a female-influenced fashion.

关键词： Gastric cancer Family history Familialgastric cancer Familial predisposition Female-influencedfashion

Indicating and predicting role of the horizontal C/D ratio in preclinical diabetic retinopathy associated with chronic angle-closure glaucoma

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International Journal of Ophthalmology(English edition) 2019年第2期12卷 268-274页

作者： Ze-long Zhong song Chen Department of Vitreoretinopathy Tianjin Eye Hospital Nankai Univesity Affilliated Eye Hospital Clinical College of Ophthalmology Tianjin Medical University

AIM: To observe morphological optic disc characteristics in patients with preclinical diabetic retinopathy(DR) associated with chronic angle-closure glaucoma(CACG). METHODS: Twenty-two cases(43 eyes) of preclinical DR associated with CACG were enrolled in group A; 24 preclinical DR cases(46 eyes) were enrolled in group B; 26 CACG cases(51 eyes) were enrolled in group C; and 49 normal controls(49 eyes) were enrolled in group D. All underwent optical coherence tomography to measure the horizontal C/D ratio(HCDR), C/D area ratio(CDaR), vertical C/D ratio(VCDR), rim area(RA), cup volume(CV), disc area(DA) and average retinal nerve fiber layer(RNFL) thickness. RESULTS: The ages of groups A, B, C, and D were 67.60±3.36, 66.78±3.33, 65.98±3.83, and 67.54±3.17 y, respectively. The HCDR values in groups A, B, and C were distinct relative to those in group D(P0.05). The CDaR values in group A were higher in comparison to those in groups B and D(P0.05). The RA values in group A were smaller relative to those in groups B and D(P0.05). The CV values in group A were greater in comparison to those in groups B and D(P0.05). DA was not distinct for comparisons of two groups among the four groups(P>0.05). HCDR value correlated with mean nasal RNFL thickness(r=-0.909,P<0.0001), mean superior RNFL thickness(r=-0.866, P<0.0001), mean inferior RNFL thickness(r=-0.650, P<0.001) and mean temporal RNFL thickness(r=-0.562, P<0.01) in group A. CONCLUSION: The HCDR was a sensitive morphological parameter in d

关键词： optic nerve diabetic retinopathy chronic angle-closure glaucoma angle closure optical coherence tomography

Cobalt nitride enabled benzimidazoles production from furyl/aryl bio-alcohols and o-nitroanilines without an external H-source

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Frontiers of Chemical Science and Engineering 2023年第1期17卷 68-81页

作者： Chuanhui Li Li-long Zhang Hu Li song Yang State Key Laboratory Breeding Base of Green Pesticide&Agricultural Bioengineering Key Laboratory of Green Pesticide&Agricultural BioengineeringMinistry of EducationState-Local Joint Laboratory for Comprehensive Utilization of BiomassCenter for R&D of Fine ChemicalsGuizhou UniversityGuiyang 550025China

Benzimidazole derivatives have wide-spectrum biological activities and pharmacological effects,but remain challenging to be produced from biomass ***,we report a green hydrogen transfer strategy for the efficient one-pot production of benzimidazoles from a wide range of bio-alcohols and o-nitroanilines enabled by cobalt nitride species on hierarchically porous and recyclable nitrogen-doped carbon catalysts(Co/CN_(x)-T,T denotes the pyrolysis temperature)without using an external hydrogen source and base *** the tested catalysts,Co/CN_(x)-700 exhibited superior catalytic performance,furnishing 2-substituted benzimidazoles in 65%–92%*** mechanistic studies manifest that the coordination between Co^(2+)and N with appropriate electronic state on the porous nitrogen-doped carbon having structural defects,as well as the remarkable synergetic effect of Co/N dual sites contribute to the pronounced activity of Co/CN_(x)-700,while too high pyrolysis temperature may cause the breakage of the catalyst Co-N bond to lower down its ***,it is revealed that the initial dehydrogenation of bio-alcohol and the subsequent cyclodehydrogenation are closely correlated with the hydrogenation of nitro *** catalytic hydrogen transfer-coupling protocol opens a new avenue for the synthesis of N-heterocyclic compounds from biomass.

关键词： biomass conversion furanic compounds benzimidazoles hydrogen transfer bifunctional catalysis

Liquiritigenin promotes osteogenic differentiation and prevents bone loss via inducing auto-lysosomal degradation and inhibiting apoptosis

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Genes & Diseases 2023年第1期10卷 284-300页

作者： Yu Qiu Yueyang Zhao Zhimin long Aijia song peng Huang Kejian Wang Ling Xu David Paul Molloy Guiqiong He College of Stomatology Chongqing Medical UniversityChongqing Key Laboratory of Oral Diseases and Biomedical SciencesChongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher EducationChongqing400016China Chongqing Key Laboratory of Neurobiology Chongqing Medical UniversityChongqing 400016China Department of Anatomy Chongqing Medical UniversityChongqing 400016China Laboratory of Medical Experiment Technology Institute of Life ScienceChongqing Medical UniversityChongqing 400016China Department of Biochemistry and Molecular Biology Chongqing Medical UniversityChongqing 400016China

Osteoporosis(OP)is a debilitating skeletal abnormality involving bone remodeling and bone cell homeostasis characterized by decreased bone strength and high fracture risk.A novel therapeutic intervention for OP by manipulating cellular autophagy-apoptosis processes to promote skeletal homeostasis is *** effects of the naturally occurring plant extract Liquiritigenin(LG)were demonstrated in an ovariectomy(OvX)-OP mouse model and preosteoblast MC3T3-E1 ***-CT and histological staining assessments of skeletal phenotype were applied alongside detection of autophagy activity in osteocytes and MC3T3-E1 cells by transmission electron microscopy(TEM).The effects of LG on chloroquine(CQ)-and the apoptosis-inducing TS-treated osteogenic differentiations and status of lysosomes within MC3T3-E1 cells were analyzed by Neutral red,Alizarin red S and alkaline phosphatase(ALP)staining and Western blot *** with LG prevented bone loss,increased osteogenic differentiation in vivo and in vitro,and inhibited osteoclast formation to some *** analyses revealed that LG can improve auto-lysosomal degradation within osteocytes from OVX mice and MC3T3-E1 *** abnormal status of lysosomes associated with CQ and TS treatments was notably alleviated by LG which also reduced levels of apoptosis-induced inhibition of osteogenic differentiation and averted abnormal osteogenic differentiation as a consequence of a blockage in autolysosome ***,LG stimulates bone growth in Oovx mice through increased osteogenic differentiation and regulation of autophagyapoptosis mechanisms,presenting an auspicious natural therapy for Op.

关键词： Apoptosis Auto-lysosomal degradation Liquiritigenin Osteogenic differentiation Osteoporosis

Evaluation of Protocols for Measuring Leaf Photosynthetic Properties of Field-Grown Rice

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Rice science 2017年第1期24卷 1-9页

作者： CHANG Tian-gen XIN Chang-peng QU Ming-nan ZHAO Hong-long song Qing-feng ZHU Xin-guang Chinese Academy of Science Key Laboratory of Computational Biology and Chinese Academy of Science-Max Planck Gesellschaft Partner Institute for Computational Biology Shanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Beijing 100049China

Largely due to the heterogeneity of environmental parameters and the logistical difficulty of moving photosynthetic equipment in the paddy fields, effective measurement of lowland rice photosynthesis is still a challenge. In this study, we showed that measuring detached rice leaves in the laboratory can not effectively represent the parameters measured in situ. We further described a new indoor facility, high-efficiency all-weather photosynthetic measurement system（HAPS）, and the associated measurement protocol to enable whole-weather measurement of photosynthetic parameters of rice grown in the paddy fields. Using HAPS, we can conduct photosynthetic measurements with a time span much longer than that appropriate for the outdoor measurements. Comparative study shows that photosynthetic parameters obtained with the new protocol can effectively represent the parameters in the fields. There was much less standard deviation for measurements using HAPS compared to the outdoor measurements, no matter for technical replications of each recording or for biological replications of each leaf position. This new facility and protocol enables rice photosynthetic physiology studies to be less tough but more efficient, and provides a potential option for large scale studies of rice leaf photosynthesis.

关键词： photosynthetic photosynthesis weather facility paddy deviation indoor outdoor heterogeneity stomatal

Nacre-inspired interface structure design of polymer bonded explosives toward significantly enhanced mechanical performance

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Defence Technology（防务技术） 2023年第9期27卷 83-92页

作者： peng Wang You-long Chen Li Meng Yin-shuang Sun Yu Dai Xin Li Jie Chen Zhi-jian Yang Guan-song He Institute of Chemical Material China Academy of Engineering PhysicsMianyang621900China

Realizing effective enhancement to the structure of interface region between explosive crystals and polymer binder plays a key role in improving the mechanical properties of the current polymer bonded explosives(PBXs).Herein,inspired by the structure of natural nacre which possesses outstanding mechanical performance,a kind of nacre-like structural layer is constructed in the interface region of PBXs composites,making use of two-dimensional graphene sheets and one-dimensional bio-macromolecules of cellulose as inorganic and organic building blocks,*** results reveal that the constructed nacre-like structural layer can effectively improve the interfacial strength and then endow the PBXs composites with significantly enhanced mechanical properties involving of creep resistance,Brazilian strength and fracture toughness,demonstrating the obvious advantage of such bioinspired interface structure design *** addition,the thermal conduction performance of PBXs composites also exhibits noticeable enhancement due to the remarkable phonon transport capability endowed by the asdesigned nacre-like structural *** believe this work provides a novel design route to conquer the issue of weak interfacial strength in PBXs composites and greatly increase the comprehensive properties for better meeting the higher requirements proposed to the explosive part of weapon equipment in new era.

关键词： Polymer bonded explosives Nacre-like structural layer Graphene Cellulose Mechanical properties

Unmanned Aerial Vehicles:Control Methods and Future Challenges

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IEEE/CAA Journal of Automatica Sinica 2022年第4期9卷 601-614页

作者： Zongyu Zuo Cunjia Liu Qing-long Han Jiawei song IEEE the Seventh Research Division Beihang University(BUAA) the Department of Aeronautical and Automotive Engineering Loughborough University the School of Science Computing and Engineering TechnologiesSwinburne University of Technology

With the rapid development of computer technology,automatic control technology and communication technology,research on unmanned aerial vehicles(UAVs)has attracted extensive attention from all over the world during the last *** due to the demand of various civil applications,the conceptual design of UAV and autonomous flight control technology have been promoted and developed *** paper is devoted to providing a brief review of the UAV control issues,including motion equations,various classical and advanced control *** basic ideas,applicable conditions,advantages and disadvantages of these control approaches are illustrated and *** challenging topics and future research directions are raised.

关键词： Aircraft control disturbance rejection path-following trajectory tracking unmanned aerial vehicle

Compact composition operators on BMOA(B_n)

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Science China Mathematics 2009年第12期52卷 2679-2687页

作者： LI song-Ying long SuJuan Department of Mathematics University of CaliforniaIrvineCA 92697USA School of Mathematics and Computer Science Fujian Normal UniversityFuzhou 350007China

The paper gives some characterization theorems for the compact composition operator on some function spaces over the unit ball B n in ? n . Especially, it gives a characterization for compact composition operators on ... 详细信息

关键词： compactness composition operators BMOA spaces 32A37 47B33