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A simplest seesaw model of the TM1 and μ-τ reflection symmetries for the neutrino masses and leptogenesis

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Communications in Theoretical Physics 2023年第6期75卷 96-102页

作者： zhen-hua Zhao Lei Zhang Yang Gao Department of Physics Liaoning Normal UniversityDalian 116029China Center for Theoretical and Experimental High Energy Physics Liaoning Normal UniversityDalian 116029China

In this paper,following the Occam’s razor principle,we have put forward a very simple form of the Dirac neutrino mass matrix M_(D) in the minimal seesaw model with the right-handed neutrino mass matrix being diagonal M_(R)=diag(M_(1),M_(2));it has one texture zero and only contains three real parameters,whose values can be determined from the neutrino oscillation experimental *** a model leads to a neutrino mass matrix M_(v)≃-M_(D)M_(R)^(-1)M_(D)^(T)that obeys the TM1 and μ-τ reflection symmetries *** this way all the lepton flavor mixing parameters except for θ_(13) are predicted;the value of θ_(12) is predicted by the TM1 symmetry,while those of θ_(23),δ,ρ and σ by the μ-τ reflection *** the neutrino masses are predicted to be of the NO case with m_(1)=0,for which all three light neutrino masses will be pinned down with the help of the experimental results for the neutrino mass squared *** these results,the effective Majorana neutrino mass∣(M_(ν))_(ee)∣that controls the rate of the neutrinoless double beta decay is predicted to be 1.6 or 3.8 meV in the case of σ=0 or π/*** have also studied the implications of the model for *** turns out that only in the two-flavor leptogenesis regime(which holds in the temperature range 10^(9)-10^(12) GeV)can leptogenesis have a chance to be *** a successful leptogenesis can be achieved at M_(1)≃1.2×10^(11) GeV in the case of σ=π/2,but not in the case of σ=0.

关键词： neutrino masses neutrino mixing seesaw model flavor symmetry leptogenesis

Effect of Aging on Hardening Behavior of 15-5 PH Stainless Steel

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Journal of Iron and Steel Research International 2015年第7期22卷 607-614页

作者： Xin-yuan PENG Xian-liang ZHOU Xiao-zhen hua zhen-wei WEI hua-ying LIU School of Materials Science and Technology Nanjing University of Aeronautics and Astronautics School of Materials Science and Engineering Nanchang Hangkong University Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province

Microstructure transformation and aging hardening behavior of 15-5 PH stainless steel were studied by optical microscopy （OM）, X-ray diffraction （XRD） and transmission electron microscopy （TEM）. The results showed that the 15-5 PH stainless steel consists of NbC precipitates and lath matensite with a high dislocation density after solution treatment. With increasing aging temperature and aging time, the martensitic laths were resolved gradually. Meanwhile, the nanometric-sized Cu precipitates gradually coarsened and lost their coherency with＇the martensite matrix, which exhibited an elliptical shape finally. Fine Cu precipitates can lead to significant dispersion hardening effect, while the coarsened Cu precipitates have no contribution to strengthening. The reversed austenite was observed in the speci- mens aged at 550 ℃ and above; moreover, the amount of reversed austenite increased as aging temperature in- creased. The precipitation hardening behavior of 15-5 PH stainless steel may depend on the balance between the softening caused by the formation of reversed austenite and the hardening caused by the precipitation of copper.

关键词： 15-5 PH stainless steel Cu precipitate reversed austenite aging hardening behavior

A brief review on studies of Alzheimer's disease in China:Its mechanism, imaging and therapy

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Science China(Life Sciences) 2013年第12期56卷 1142-1144页

作者： SHI hua WANG zhen Britton Chance Center for Biomedical Photonics Huazhong University of Science and Technology-Wuhan National Laboratory for Optoelectronics MOE Key Laboratory for Biomedical Photonics Department of Biomedical EngineeringHuazhong University of Science and Technology

Alzheimer’s disease(AD)was first described by German psychiatrist and neuropathologist Alois Alzheimer in 1906and was named after *** is the most common form of dementia and highly *** is predicted to affect one in 85 people globally by ***-known examples include Ronald Reagan,former US President,and Charles ***,recipient of the 2009 Nobel Prize in Physics.

关键词：阿尔茨海默氏病诺贝尔物理学奖机理中国治疗成像老年痴呆理学家

Material flow analysis and global warming potential assessment of an industrial insect-based bioconversion plant using housefly larvae

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Journal of Environmental Sciences 2024年第5期139卷 483-495页

作者： Tao Lu Fan Lü Nanlin Liao Honghui chai hua Zhang Pinjing He Institute of Waste Treatment and Reclamation Tongji UniversityShanghai 200092China State Key Laboratory of Pollution Control and Source Reuse Tongji UniversityShanghai 200092China Zhejiang Qihe Ecological Technology Co. Ltd.Hangzhou 310052China

The significant increase in the demand for biomass waste treatment after garbage classification has led to housefly larvae treatment becoming an attractive treatment *** can provide a source of protein while treating biomass waste,which means that nutrients can be returned to the natural food ***,the performance of this technology in terms of its environmental impacts is still unclear,particularly with regards to global warming potential(GWP).This study used a life cycle assessment(LCA)approach to assess a housefly larvae treatment plant with a treatment capacity of 50 tons of biomass waste per *** LCA results showed that the 95% confidence intervals for the GWP in summer and winter were determined to be 24.46-32.81 kg CO_(2) equivalent(CO_(2)-eq)/ton biomass waste and5.37-10.08 kg CO_(2)-eq/ton biomass waste,*** greater GWP value in summer is due to the longer ventilation time and higher ventilation intensity in summer,which consumes more *** main GWP contributions are from(1)electricity needs(accounting for 78.6% of emissions in summer and 70.2%in winter)and(2)product substitution by mature housefly larvae and compost(both summer and winter accounting for 96.8% of carbon reduction).

关键词： Biomass waste Musca domestica Housefly larvae Life cycle assessment Global warming potential

Anti-saturation fault-tolerant adaptive torsional vibration control with fixed-time prescribed performance for rolling mill main drive system

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Journal of Iron and Steel Research International 2024年第3期31卷 660-669页

作者： Shuang Liu Chen Du Cong Zhang zhen-hua Bai Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan UniversityQinhuangdao 066004HebeiChina National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityQinhuangdao 066004HebeiChina

An anti-saturation fault-tolerant adaptive torsional vibration control method with fixed-time prescribed performance for the rolling mill main drive system(RMMDS)was investigated,which is affected by control input saturation,actuator faults,sensor measurement errors,and parameter ***,we gave a continuously differentiable saturation function to approximate the control input saturation characteristic of the RMMDS,translating the saturation characteristic into the matched uncertainty and unknown time-varying gain in the ***,an RMMDS mathematical model with unmatched uncertainty and unknown time-varying gain was developed,taking into account the presence of control input saturation,actuator faults,sensor measurement errors,and parameter *** on the established mathematical model,an error transformation model of the roll speed tracking was constructed by the equivalent error transformation *** to the error transformation model,a barrier Lyapunov function and a novel adaptive controller were studied to ensure that the roll speed tracking error always evolves inside a fixed-time asymmetric ***,numerical simulations were performed in Matlab/Simulink to verify the effectiveness and superiority of the proposed control method in suppressing the RMMDS torsional vibration.

关键词： Fixed-time prescribed performance Control input saturation Actuator fault Unknown time-varying gain Adaptive control Asymmetric constraint

Preparation and Characterization of Poly(vinyl alcohol)/ZIF-8 Porous Composites by Ice-templating Method with High ZIF-8 Loading Amount

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Chinese Journal of Polymer Science 2020年第6期38卷 638-643页

作者： Xuan-He Yang Yan-Qing Yao Mu-hua huang Chun-Peng chai School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

A bulk Poly(vinyl alcohol)/ZIF-8(PVA/ZIF-8)porous composite with aligned porous structure was prepared by ice-templating *** microstructure of PVA/ZIF-8 porous composites was characterized by scanning electron microscopy(SEM).The results showed that the composites had regular pore structure and ZIF-8 nanoparticles were evenly distributed on the skeleton of PVA.X-ray diffraction(XRD)test results showed that the crystalline structure of ZIF-8 was well preserved in the *** specific surface area of the composite was characterized by nitrogen adsorption/desorption *** specific surface area of the composite was up to 1160 m^2 g^***/ZIF-8 porous composites could also support a certain weight with almost no volume *** carbon dioxide adsorption quantity of the composite was up to 11.3 cm^3 g^1,proving that PVA/ZIF-8 porous composite has a good application prospect in the field of carbon dioxide adsorption.

关键词： Poly(vinyl alcohol) ZIF-8 Ice-templating Porous composite C02 adsorption

Interface reactions between TiAl alloys and diacetatozirconic acid-yttria molds differentiated by ammonium metatungstate addition

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Rare Metals 2023年第1期42卷 296-301页

作者： Yong-Shuang Cui De-Bo Liu Li-hua chai Zi-Yong Chen College of Materials Science and Engineering Beijing University of TechnologyBeijing100124China Beijing Institute of Astronautical Systems Engineering Beijing100076China

Two types of diacetatozirconic acid-yttria molds which were labeled as ZYW mold(diacetatozirconic acidyttria mold with traces of ammoium metatungstate in the slurry) and ZY mold(diacetatozirconic acid-yttria mold without ammonium metatungstate) were prepared by traditional investment *** ZYW and ZY molds were sintered in a carbon-reducing atmosphere and in air,respectively,at 1550℃ for 4 *** between Ti-47Al-2Cr-2Nb(at%) alloys and the molds at 1650℃ for 30 min were *** microstructures of the metalmold interfaces and the presence of inclusions and oxygen contamination in the TiAl bulk alloy were analyzed,and the influences of ammonium metatungstate were *** results indicate that WO_(3)releases O into the TiAl melt,introducing tungsten metal into the alloy *** TiAl alloy ingots cast in the ZY molds had the fewest inclusions and the lowest oxygen contamination.

关键词： TiAl-based alloys Diacetatozirconic acidyttria molds Ammonium metatungstate Interactions

透明质酸下调髁突软骨细胞piezo蛋白表达缓解颞下颌关节骨关节炎的实验研究

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临床口腔医学杂志 2025年第1期41卷 9-13页

作者：张珍黄宏江恒华武汉大学口腔医学院正畸二科湖北武汉430079

目的:探究透明质酸(hyaluronic acid,HA)通过下调piezo蛋白缓解颞下颌关节骨关节炎(temporomandibular joint osteoarthritis,TMJOA)的潜在机制。方法:构建大鼠TMJOA模型,建模2周后予以HA治疗;HE染色、甲苯胺蓝染色、Masson染色观察TMJOA发生和HA治疗后髁突病理改变并行改良Mankin OA评分,免疫组织化学染色检测髁突软骨piezo1和piezo2的表达变化,免疫组织荧光染色检测髁突软骨GPX4的表达变化。结果:碘乙酸钠成功诱导大鼠髁突产生TMJOA样病理变化,HA治疗2周后髁突软骨损伤得到修复,改良Mankin OA评分降低;HA抑制大鼠TMJOA髁突软骨中piezo1和piezo2的高表达,同时逆转GPX4的低表达。结论:HA可能通过下调piezo1和piezo2的表达和抑制髁突软骨细胞铁死亡,进而有效缓解大鼠TMJOA的进展。

关键词：颞下颌关节骨关节炎透明质酸 Piezo 铁死亡软骨细胞

Probes of axial and nonaxial hexadecapole deformation effects in nuclei around^(230)U

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Communications in Theoretical Physics 2023年第2期75卷 133-143页

作者： Zhuo Song hua-Lei Wang zhen-zhen Zhang Min-Liang Liu School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Key Laboratory of High Precision Nuclear Spectroscopy Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

The structure properties for even–even nuclei around^(230)U,located on the hexadecapoledeformation island,are investigated using the potential-energy-surface calculation within the framework of the macroscopic-microscopic *** impact of different deformation degrees of freedom(including axial and nonaxial quadrupole and hexadecapole deformations)on total energy,shell,and pairing contributions is analyzed,based on the projected energy maps and *** single-particle structure is presented and briefly *** a large extent,a much better agreement with experimental data and other theoretical results is obtained if the hexadecapole deformations,especially the axial one,are taken into *** results could provide useful insights into understanding the effects of different quadrupole and hexadecapole deformations.

关键词： hexadecapole deformation triaxial deformation even-even nuclei potential-energysurface calculation macroscopic−microscopic model