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基于矿石中硅铝铁的品位对安徽省凤阳县灵山-木屐山矿区的矿石小体重进行预测

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世界有色金属 2024年第7期 217-219页

作者：马彤宇安徽省地质矿产勘查局313地质队地质实验室安徽六安237010

矿石小体重在资源储量估算过程中是一个重要参数,它的准确与否,直接影响矿床的经济评价和矿山储量估算结果。为减小矿石小体重的误差,在矿业技术及数字化时代的技术革新背景下,本文使用Python语言构建矿石中硅铝铁的品位与矿石小体重之... 详细信息

矿石小体重在资源储量估算过程中是一个重要参数,它的准确与否,直接影响矿床的经济评价和矿山储量估算结果。为减小矿石小体重的误差,在矿业技术及数字化时代的技术革新背景下,本文使用Python语言构建矿石中硅铝铁的品位与矿石小体重之间的BP神经网络预测模型,实现了对该矿区矿石小体重的预测,当均方误差损失值为0.0022时,此模型预测结果有着96.55%的准确率。通过对测量值和预测值的对比,筛选结果偏差大的样品进行重新测量,校验样品的小体重,以确保每个样品小体重值的可靠性和准确性。

关键词： BP神经网络矿石小体重矿产储量

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Population genetic structure of Chinese Puccinia triticina races based on multi-locus sequences

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Journal of Integrative Agriculture 2018年第8期17卷 1779-1789页

作者： LIU Tai-guo GE Run-jing ma yu-tong LIU Bo GAO Li CHEN Wan-quan State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences

Puccinia triticina, the causal agent of wheat leaf rust, is one of the most devastating rust fungi attacking wheat worldwide. Seventy-six isolates of the wheat leaf rust pathogen from yunnan, Sichuan, Gansu and Henan provinces, China, were tested on wheat leaf rust differentials and the population structure was analyzed using four presumably neutral partial sequence markers such as elongation factor-1α(EF-1α), glyceraldehyde-3-phosphate dehydrogenase(GAPDH), β-tubulin(TUB) and the second largest RNA polymerase subunit(RPB2). The phenotypic diversity of yunnan and Sichuan populations was higher than that of Gansu and Henan populations. The four populations were separated into two clusters based on the pathogenic data. A total of 12 single nucleotide polymorphisms(SNPs) and 32 haplotypes were identified among the four sequences. The 32 haplotypes were divided into two clusters in a neighbor-joining tree. Bayesian analyses also identified two clusters. Pairwise FST between populations in different regions were significantly different(P<0.05). Analysis of molecular variance(AMOVA) indicated that 68% of the total genetic variation was within populations.

关键词： population structure polymorphism virulence wheat leaf rust Puccinia triticina

Biotoxicity dynamic change and key toxic organics identification of coal chemical wastewater along a novel full-scale treatment process

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Journal of Environmental Sciences 2024年第4期138卷 277-287页

作者： Weiwei ma Xiaoqi Zhang Hongjun Han Xueqing Shi Qiaoping Kong tong yu Fei Zhao School of Environmental and Municipal Engineering Qingdao University of TechnologyQingdao 266520China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

It is particularly important to comprehensively assess the biotoxicity variation of industrial wastewater along the treatment process for ensuring the water environment ***,intensive studies on the biotoxicity reduction of industrial wastewater are still *** this study,the toxic organics removal and biotoxicity reduction of coal chemical wastewater(CCW)along a novel full-scale treatment process based on the pretreatment process-anaerobic process-biological enhanced(BE)process-anoxic/oxic(A/O)process-advanced treatment process was *** process performed great removal efficiency of COD,total phenol,NH_(4)^(+)-N and total *** the biotoxicity variation along the treatment units was analyzed from the perspective of acute biotoxicity,genotixicity and oxidative *** results indicated that the effluent of pretreatment process presented relatively high acute biotoxicity to Tetrahymena *** the acute biotoxicity was significantly reduced in BE-A/O *** the genotoxicity and oxidative damage to Tetrahymena thermophila were significantly decreased after advanced *** polar organics in CCW were identified as the main biotoxicity *** were positively correlated with acute biotoxicity,while the nitrogenous heterocyclic compounds and polycyclic aromatic hydrocarbons were positively correlated with *** the biotoxicity was effectively reduced in the novel full-scale treatment process,the effluent still performed potential biotoxicity,which need to be further explored in order to reduce environmental risk.

关键词： Acute biotoxicity Genotoxicity Oxidative damage Toxic organics Coal chemical wastewater Novel full-scale treatment process

Overview of enhancing biological treatment of coal chemical wastewater:New strategies and future directions

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Journal of Environmental Sciences 2024年第1期135卷 506-520页

Coal chemical wastewater(CCW)is a type of refractory industrial wastewater,and its treatment has become the main bottleneck restricting the sustainable development of novel coal chemical *** treatment is considered as an economical,effective and environmentally friendly technology for CCW ***,conventional biological process is difficult to achieve the efficient removal of refractory organics because of CCW with the characteristics of composition complexity and high ***,seeking the novel enhancement strategy appears to be a favorable solution for enhancing biological treatment efficiency of *** review focuses on presenting a comprehensive picture about the exogenous enhancement strategies for CCW biological *** performance and potential application of exogenous enhancement strategies,including co-metabolic substrate enhancement,biofilm filler enhancement,adsorption material enhancement and conductive mediator enhancement,were ***,the enhancing mechanisms of different strategies were comprehensively discussed from a biological ***,the prospects of enhancement strategies based on the engineering performance,economic cost and environmental impact(3E)evaluation were *** novel enhancement strategy based on“low carbon emissions”,“resource recycling”and“water environment security”in the context of carbon neutrality was *** together,this review provides technical reference and new direction to facilitate the regulation and optimization of typical industrial wastewater biological treatment.

关键词： Coal chemical wastewater Biological treatment Exogenous enhancement Refractory organics 3E evaluation

Effect of Sonic hedgehog gene-modified bone marrow mesenchymal stem cells on graft-induced retinal gliosis and retinal ganglion cells survival in diabetic mice

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International Journal of Ophthalmology(English edition) 2024年第1期17卷 34-41页

作者： tong Wang Hai-Chun Li Jin ma Xi-Ling yu State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhou 510060Guangdong ProvinceChina

AIM:To investigate the effects of Sonic hedgehog(Shh)gene-modified bone marrow mesenchymal stem cells(MSCs)on graft-induced retinal gliosis and retinal ganglion cells(RGCs)survival in diabetic ***:Bone marrow-derived MSCs were genetically modified with the Shh gene to generate a stably transfected cell line of Shh-modified MSCs(MSC-Shh).Intravitreal injections of MSC-Shh and green fluorescent protein-modified MSCs(MSC-Gfp;control)were administered in diabetic *** 4wk,the effects of MSC-Shh on retinal gliosis were evaluated using fundus photography,and markers of gliosis were examined by immunofluorescence and Western *** neurotrophic factors expression and RGCs survival in the host retina were evaluated using Western blotting and *** mechanisms underlying the effects of MSC-Shh was ***:A significant reduction of proliferative vitreoretinopathy(PVR)was observed after intravitreal injection of MSC-Shh compared to *** downregulation of glial fibrillary acidic protein(GFAP)was demonstrated in the host retina after MSC-Shh administration compared to *** extracellular signal-regulated kinase 1/2(ERK1/2),protein kinase B(AKT)and phosphatidylin-ositol-3-kinase(PI3K)pathways were significantly downregulated after MSC-Shh administration compared to ***-derived neurotrophic factor(BDNF)and ciliary neurotrophic factor(CNTF)levels were significantly increased in the host retina,and RGCs loss was significantly prevented after MSC-Shh ***:MSC-Shh administration reduces graft-induced reactive gliosis following intravitreal injection in diabetic *** ERK1/2,AKT and PI3K pathways are involved in this ***-Shh also increases the levels of neurotrophic factors in the host retina and promoted RGCs survival in diabetic mice.

关键词： mesenchymal stem cells Sonic hedgehog signaling reactive gliosis diabetic retinopathy retinal ganglion cells

Testing Bell inequality through h→ττ at CEPC

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Chinese Physics C 2024年第10期48卷 59-71页

作者： Kai ma tong Li Faculty of Science Xi'an University of Architecture and TechnologyXi'an 710055China School of Physics Nankai UniversityTianjin 300071China

The decay of Higgs boson into two spin-1/2 particles provides an ideal system to reveal quantum entanglement and *** e^(+)e^(-) colliders can improve the measurement accuracy of the spin correlation of tau lepton pairs from Higgs boson *** show the testability of Bell inequality through h→ττ at Circular Electron Positron Collider(CEPC).Two realistic methods of testing Bell inequality are investigated,i.e.,Törnqvist's method and Clauser-Home-Shimony-Holt(CHSH)*** the simulation,we consider the detector effects of CEPC including uncertainties for tracks and jets from Z boson in the production of e^(+)e^(-)→*** reconstruction approaches are described to measure quantum entanglement between τ^(+) and τ^(-).Finally,we show the sensitivity of CEPC to Bell inequality violation for the two methods.

关键词： Bell inequality Higgs boson CEPC

Opportunities for production and property research of neutron-rich nuclei around N=126 at HIAF

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Nuclear Science and Techniques 2024年第6期35卷 101-113页

作者： Shao-Bo ma Li-Na Sheng Xue-Heng Zhang Shi-Tao Wang Kai-Long Wang Chun-Wang ma Hool-Jin Ong Zhi-yu Sun Shu-Wen Tang yu-Hong yu Xin-tong Du Xiao-Bao Wei Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516000China University of Chinese Academy of Sciences Beijing 100049China College of Physics Henan Normal UniversityXinxiang 453007China Institute of Nuclear Science and Technology Henan Academy of ScienceZhengzhou 450046China Joint-Department for Nuclear Physics Lanzhou University and Institute of Modern PhysicsLanzhou 730000China Research Center for Nuclear Physics Osaka UniversityOsaka 567-0047Japan RIKEN Nishina Center Saitama 351-0198Japan Northwest Normal University Lanzhou 730070China

The study of nuclide production and its properties in the N=126 neutron-rich region is prevalent in nuclear physics and astrophysics *** upcoming High-energy FRagment Separator(HFRS)at the High-Intensity heavy-ion Accelerator Facility(HIAF),an in-flight separator at relativistic energies,is characterized by high beam intensity,large ion-optical acceptance,high magnetic rigidity,and high momentum resolution *** provides an opportunity to study the production and properties of neutron-rich nuclei around N=*** this paper,an experimental scheme is proposed to produce neutron-rich nuclei around N=126 and simultaneously measure their mass and lifetime based on the HFRS separator;the feasibility of this scheme is evaluated through *** results show that under the high-resolution optical mode,many new neutron-rich nuclei approaching the r-process abundance peak around A=195 can be produced for the first time,and many nuclei with unknown masses and lifetimes can be produced with high *** the time-of-flight corrected by the measured dispersive position and energy loss information,the cocktails produced from 208 Pb fragmentation can be unambiguously ***,the masses of some neutron-rich nuclei near N=126 can be measured with high precision using the time-of-flight magnetic rigidity *** indicates that the HIAF-HFRS facility has the potential for the production and property research of neutron-rich nuclei around N=126,which is of great significance for expanding the chart of nuclides,developing nuclear theories,and understanding the origin of heavy elements in the universe.

关键词： HFRS Fragmentation Neutron-rich nuclei around N=126 mass measurement Lifetime

The impact of female sex hormones on cardiovascular disease:from mechanisms to hormone therapy

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Journal of Geriatric Cardiology 2024年第6期21卷 669-681页

作者： Yi KAN yu-Lu PENG Ze-Hao ZHAO Shu-tong DONG Yin-Xiao XU Xiao-Teng ma Xiao-Li LIU yu-Yang LIU yu-Jie ZHOU Department of Cardiology Beijing Anzhen HospitalCapital Medical UniversityBeijing Institute of Heart Lung and Blood Vessel DiseaseBeijing Key Laboratory of Precision Medicine of Coronary Atherosclerotic DiseaseClinical Center for Coronary Heart DiseaseCapital Medical UniversityBeijingChina

Cardiovascular disease remains the leading cause of mortality in women,yet it has not raised the awareness from the *** pathogenesis of cardiovascular disease differs significantly between females and males concerning the effect of sex *** and progestogen impact cardiovascular system through genomic and non-genomic *** menopause,cardiovascular protective effects of estrogens have been well *** were often used in combination with estrogens in hormone *** in sex hormone levels,particularly estrogen deficiency,were considered the specific risk factor in women’s cardiovascular ***,considerable heterogeneity in the impact of hormone therapy was observed in clinical *** heterogeneity is likely closely associated with factors such as the initial time,administration route,dosage,and formulation of hormone *** review will delve into the pathogenesis and hormone therapy,summarizing the effect of female sex hormones on hypertension,pre-eclampsia,coronary heart disease,heart failure with preserved ejection fraction,and cardiovascular risk factors specific to women.

关键词： impact dosage protective

Lightweight Si_(3)N_(4)@SiO_(2) ceramic foam for thermal insulation and electromagnetic wave transparency

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Nano Research 2024年第5期17卷 4298-4306页

作者： Zongwei tong Xiangjie Yan yuexiang Wang Kexun Li Weihai ma China-Blarus Belt and Road Joint Laboratory on Electromagnetic Environment Effect the 33rd Research Institute of ChinaElectronics Technology Group CorporationTaiyuan 030032China Key Laboratory for Advanced Ceramics and machining Technology of Ministry of Education School of Material Science and EngineeringTianjin UniversityTianjin 300072China Department of materials Science and Engineering Jinzhong UniversityJinzhong 030619China

Increasing porosity is one of the most direct ways to improve the thermal insulation and dielectric properties of *** now,many wet methods for preparing Si_(3)N_(4) ceramic foams usually face the problems of complex rheology,long period,and expensive cost,and the reported pore sizes of Si_(3)N_(4) ceramic foams are typically micron-grade,resulting in a lack of competitiveness in thermal insulation and wave-transparent *** this paper,the Si_(3)N_(4)@SiO_(2) ceramic foams were prepared using an efficient dry-method,which combined three processes of low temperature chemical vapor deposition(LTCVD),template,and isostatic *** method has the advantages of simple operation and short preparation period,and can realize near-net size molding and mass *** addition,the evolution mechanisms of honeycomb microstructure and composition of Si_(3)N_(4)@SiO_(2) ceramic foam during sintering were studied by chemical reaction *** as-prepared Si_(3)N_(4)@SiO_(2) ceramic foam possesses low density(0.377 g·cm^(-3)),high compressive strength(7.5 MPa),low thermal conductivity(0.0808 W·m^(-1)·K^(-1)),and excellent dielectric properties(εmaximum working temperature in air can reach up to 1100℃.It will be recommended to be applied in the interlayer of Si_(3)N_(4) ceramic radome to improve its thermal insulation and electromagnetic wave transparency performances.

关键词： silicon nitride ceramic foam honeycomb microstructure dielectric properties thermal insulation