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Possibilities for the synthesis of superheavy element Z=121 in fusion reactions

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Nuclear Science and Techniques 2024年第6期35卷 90-100页

作者： Ming-Hao zhang Yu-Hai zhang Ying Zou Xiu-Xiu Yang Gen zhang Feng-Shou zhang The Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Institute of Radiation Technology Beijing Academy of Science and TechnologyBeijing 100875China School of Physical Science and Technology Guangxi UniversityNanning 530004China National Laboratory of Heavy Ion Accelerator of Lanzhou Center of Theoretical Nuclear PhysicsLanzhou 730000China

Based on the dinuclear system model,the calculated evaporation residue cross sections matched well with the current experimental *** synthesis of superheavy elements Z=121 was systematically studied through combinations of stable projectiles with Z=21-30 and targets with half-lives exceeding 50 *** influence of mass asymmetry and isotopic dependence on the projectile and target nuclei was investigated in *** reactions^(254)Es(^(46)Ti,3n)^(297)121 and^(252)Es(^(46)Ti,3n)^(295)121 were found to be experimentally feasible for synthesizing superheavy element Z=121,with maximal evaporation residue cross sections of 6.619 and 4.123 fb at 219.9 and 223.9 MeV,respectively.

关键词： Superheavy nuclei Dinuclear system model Fusion reaction Evaporation residue cross section

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数字时代的就业风险分配:制度主义的视角

社会学研究 2024年第5期 90-112,M0005页

作者：张顺吕风光西安交通大学人文社会科学学院社会学系西安交通大学人文社会科学学院实证社会科学研究所

本文以风险社会的制度主义视角,从失业风险和收入风险两个维度衡量就业风险,构建数字时代就业风险分配的理论模型并进行实证研究。研究发现,数字时代影响就业风险存在两种路径:一是数字技术系统通过创造就业和扩大竞争,促使失业风险向... 详细信息

本文以风险社会的制度主义视角,从失业风险和收入风险两个维度衡量就业风险,构建数字时代就业风险分配的理论模型并进行实证研究。研究发现,数字时代影响就业风险存在两种路径:一是数字技术系统通过创造就业和扩大竞争,促使失业风险向收入风险转化;二是在制度系统路径中,人力资本、政治资本和社会资本分别作为市场机制、组织体制机制与关系机制产生相异的分配效应,三者均能降低失业风险,政治资本和社会资本降低收入风险,而人力资本扩大收入风险。本研究进一步显示,数字技术重构了制度路径的作用空间。随着数字技术的发展,风险分配的制度性作用空间下降,使得失业风险趋于收敛,而收入风险加剧分化。

关键词：数字时代就业风险制度主义失业风险收入风险

Degradable magnesium alloy suture promotes fibrocartilaginous interface regeneration in a rat rotator cuff transosseous repair model

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Journal of Magnesium and Alloys 2024年第1期12卷 384-393页

作者： Baoxiang zhang Wen zhang Fei zhang Chao Ning Mingyang An Ke Yang Lili Tan Qiang zhang Department of Sports Medicine Chinese PLA General HospitalBeijing 100853China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Medical School of PLA Beijing 100853China Institute of Orthopedics Chinese PLA General HospitalBeijing Key Lab of Regenerative Medicine in OrthopedicsKey Lab of Musculoskeletal Trauma&War Injuries of Chinese PLABeijing 100853China

Despite transosseous rotator cuff tear repair using sutures is widely accepted for tendon-bone fixation,the fibrocartilaginous enthesis regeneration is still hardly achieved with the traditional *** the present work,degradable magnesium(Mg)alloy wire was applied to suture supraspinatus tendon in a rat acute rotator cuff tear model with Vicryl Plus 4±0 absorbable suture as *** shoulder joint humerus-supraspinatus tendon complex specimens were retrieved at 4,8,and 12 weeks after *** Mg alloy suture groups showed better biomechanical properties in terms of ultimate load to *** observation showed that hyperplastic response of the scar tissue at the tendon-bone interface is progressively alleviated over time in the both Mg alloy suture and Vicryl suture *** the histological analysis,for Mg alloy suture groups,chondrocytes appear to proliferate at 4 weeks postoperatively,and the tendon-bone interface showed an orderly structural transition zone at 8 weeks *** collagenous fiber tended to be aligned and the tendon-bone interlocking structures apparently formed,where transitional structure from unmineralized fibrocartilage to mineralized fibrocartilage was closer to the native fibrocartilaginous *** vivo degradation of the magnesium alloy wire was completed within 12 *** results indicated that Mg alloy wire was promising as degradable suture with the potential to promotes fibrocartilaginous interface regeneration in rotator cuff repair.

关键词： Rotator cuff repair Mg alloy wire Tendon-bone healing Fibrocartilaginous interface

Road map for, and technical challenges of, carbon-nanotube integrated circuit technology

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National Science Review 2024年第3期11卷 14-16页

作者： Jia Si Panpan zhang Zhiyong zhang Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-based Electronics School of Electronics Peking University State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

The past decade has witnessed an explosion of research on carbon-nanotube(CNT) electronics due to their outstanding properties, including an ultrathin body, a high carrier mobility and a high saturation velocity.

关键词： TRANSISTORS

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企业数字化对劳动力市场就业风险的影响

当代经济科学 2024年第4期46卷 14-26页

作者：张顺吕风光西安交通大学人文社会科学学院陕西西安710049

企业数字化是数字经济的微观形态,对劳动力市场将产生深刻影响。在劳动力价格不断上涨的背景下,探讨企业数字化如何影响就业风险具有重要意义。采用劳动力需求弹性衡量劳动力市场就业风险,基于2010—2020年中国A股上市企业数据考察企业... 详细信息

企业数字化是数字经济的微观形态,对劳动力市场将产生深刻影响。在劳动力价格不断上涨的背景下,探讨企业数字化如何影响就业风险具有重要意义。采用劳动力需求弹性衡量劳动力市场就业风险,基于2010—2020年中国A股上市企业数据考察企业数字化对就业风险的影响,发现企业数字化能够降低劳动力市场的就业风险,总体上具有积极的就业效应。从作用机制来看,企业数字化通过生产力机制与资源机制对劳动力市场就业风险产生影响,前者表现为替代效应与规模效应,后者表现为融资效应,其中替代效应深化就业风险,而规模效应与融资效应缓解就业风险。实证结果表明,生产力机制的规模效应与资源机制的融资效应占据主导地位,这两个效应均显著存在。在数字经济所催生的企业数字化过程中,借助数字化转型推动企业发展,进而改善经营状况,对化解劳动者就业风险,实现更加充分更高质量就业具有积极意义。

关键词：企业数字化就业风险劳动力需求弹性数字经济新质生产力稳就业政策

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Influence of pressure disturbance wave on dynamic response characteristics of liquid film seal for multiphase pump

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Petroleum Science 2024年第3期21卷 2048-2065页

作者： Qing-Ping Li Jin-Ya zhang Jia-Xiang zhang Yong-Xue zhang CNOOC Research Institute Company Limited Beijing100028China State Key Laboratory of Natural Gas Hydrate Beijing100028China College of Mechanical and Transportation Engineering China University of PetroleumBeijing2249China

Slug flow or high GVF(Gas Volume Fraction)conditions can cause pressure disturbance waves and alternating loads at the boundary of mechanical seals for multiphase pumps,endangering the safety of multiphase pump *** mechanical seal model is simplified by using periodic boundary conditions and numerical calculations are carried out based on the Zwart-Gerber-Belamri cavitation ***(User Define Function)programs such as structural dynamics equations,alternating load equations,and pressure disturbance equations are embedded in numerical calculations,and the dynamic response characteristics of mechanical seal are studied using layered dynamic mesh *** results show that when the pressure disturbance occurs at the inlet,as the amplitude and period of the disturbance increase,the film thickness gradually *** the fundamental reason for the hysteresis of the film thickness change is that the pressure in the high-pressure area cannot be restored in a timely *** maximum value of leakage and the minimum value of axial velocity are independent of the disturbance period and determined by the disturbance *** mutual interference between enhanced waves does not have a significant impact on the film thickness,while the front wave in the attenuated wave has a promoting effect on the subsequent film thickness changes,and the fluctuation of the liquid film cavitation rate and axial velocity under the attenuated wave condition deviates from the initial *** with pressure disturbance conditions,alternating load conditions have a more significant impact on film thickness and *** actual operation,it is necessary to avoid alternating load conditions in multiphase pump mechanical seals.

关键词： Multiphase pump Liquid film seal Pressure disturbance wave Dynamic response characteristics

“996”工作模式对配偶心理健康的溢出效应——基于CFPS2018的实证研究

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人口与发展 2024年第3期30卷 64-76页

作者：李韵秋张顺西安交通大学人文社会科学学院陕西西安710049

超时劳动对个体心理健康的负面效果已被广泛证实,但已有研究较少探讨“996”工作模式对配偶心理健康产生的溢出效应。使用CFPS2018年的夫妻匹配样本分析“996”工作模式对配偶心理健康的影响,结果发现无论妻子或丈夫是“996”工作模式,... 详细信息

超时劳动对个体心理健康的负面效果已被广泛证实,但已有研究较少探讨“996”工作模式对配偶心理健康产生的溢出效应。使用CFPS2018年的夫妻匹配样本分析“996”工作模式对配偶心理健康的影响,结果发现无论妻子或丈夫是“996”工作模式,都会造成另一方的心理健康水平显著下降,并且丈夫是“996”工作模式对妻子心理健康的影响强度更大。在影响机制方面,当妻子是“996”工作模式时,会显著降低丈夫对妻子家庭经济贡献和家务贡献的满意度,进而传递到心理健康方面。同时,丈夫的“996”工作模式也通过上述两条中介路径影响妻子心理健康,相关结论均通过了稳健性检验。因此,“996”工作模式不仅会对劳动者自身健康产生影响,还会在家庭内部产生溢出效应,影响配偶的心理健康水平。

关键词： “996”工作模式心理健康配偶溢出效应

Solid Bronsted acidity boosts adsorption reactivity of nano-adsorbent for water decontamination

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Frontiers of Environmental Science & Engineering 2024年第7期18卷 23-34页

作者： Sikai Cheng Zhixian Li Kaisheng zhang Qingrui zhang Xiaolin zhang Bingcai Pan State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Environmental Materials and Pollution Control Laboratory Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Hebei Key Laboratory of Heavy Metal Deep-remediation in Water and Resource Reused Qinhuangdao 066004China Research Center for Environmental Nanotechnology(ReCENT) Nanjing UniversityNanjing 210023China

Despite the development of various Lewis acidic nano-adsorbents for fluoride removal through innersphere coordination,strong competition for hydroxyl ions still hinders efficient water *** addition,the critical issue of polysilicate scaling that results from the ubiquitous silicates must be *** tackle these issues,an alternative approach to enhancing adsorption reactivity by modifying nano-adsorbents with dual Lewis and Bronsted acidity is *** feasibility of this approach is demonstrated by growing zirconium phosphate(ZrP)inside a gel-type anion exchanger,N201,to produce nanocomposite ZrP@N201,in which the confined ZrP contained an otherwise metastable amorphous phase with Lewis acidic Zr^(4+) sites and Bronsted acidic monohydrogen phosphate groups(-O_(3)POH).Compared with the Lewis acidic nano-zirconium oxide analog(HZ0@N201),ZrP@N201 exhibited a greatly improved adsorption capacity(117.9 vs.52.3 mg/g-Zr)and mass transfer rate(3.56×10^(-6) vs.4.55×10^(-7) cm/s),while bulk ZrP produced a thermodynamically stableα-phase with Bronsted acidity that exhibited negligible adsorption capability toward *** enhanced defluoridation activity of ZrP@N201 is attributed to Bronsted acidity and the increased outer electron density of ZA+sites,as corroborated using XPS and solid-state NMR ***,Bronsted acidity strengthens the resistance of ZrP@N201 to silicate,allowing its full regeneration during cyclic *** tests demonstrated 3-10 times the amount of clean water from(waste)for ZrP@N201 as compared to both HZO@N201 and the widely used activated aluminum *** study highlights the potential of developing nano-adsorbents with dual acidities for various environmental remediation applications.

关键词： Nanocomposite Selective adsorption Fluoride removal Dual Lewis and Bronsted acidity Regeneration

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拓扑空间中的理想收敛

吉林大学学报（理学版） 2024年第1期62卷 13-19页

作者：王武张舜天津理工大学中环信息学院基础部天津300380 天津仁爱学院数学教学部天津301636

用理想收敛结构解决定向拓扑的刻画问题,给出理想S极限和理想广义S极限可拓扑化的充要条件.结果表明:T0拓扑空间上的定向拓扑、理想S极限拓扑和理想广义S极限拓扑相同;定向空间中的理想S收敛是拓扑的当且仅当其为c-空间;定向空间中理想... 详细信息

用理想收敛结构解决定向拓扑的刻画问题,给出理想S极限和理想广义S极限可拓扑化的充要条件.结果表明:T0拓扑空间上的定向拓扑、理想S极限拓扑和理想广义S极限拓扑相同;定向空间中的理想S收敛是拓扑的当且仅当其为c-空间;定向空间中理想广义S收敛是拓扑的当且仅当其为局部强紧空间.

关键词：理想S极限理想广义S极限 c-空间局部强紧空间定向拓扑