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Examining the association between delay discounting,delay aversion and physical activity in Chinese adults with type-2 diabetes mellitus

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World Journal of Diabetes 2024年第4期15卷 675-685页

作者： Yong-Dong An Guo-Xia Ma Xing-kui cai Ying Yang Fang Wang Zhan-Lin Zhang Department of Endocrinology People's Hospital of Linxia Hui Autonomous PrefectureLinxia Hui Autonomous Prefecture 731100Gansu ProvinceChina Department of Gynecology People's Hospital of Linxia Hui Autonomous PrefectureLinxia Hui Autonomous Prefecture 731100Gansu ProvinceChina The First Clinical Medical College Lanzhou UniversityLanzhou 730013Gansu ProvinceChina Department of Internal Medicine People's Hospital of HezhengLinxia Hui Autonomous Prefecture 731200Gansu ProvinceChina Department of Geratology People's Hospital of Linxia Hui Autonomous PrefectureLinxia Hui Autonomous Prefecture 731100Gansu ProvinceChina Department of Medical People's Hospital of Linxia Hui Autonomous PrefectureLinxia Hui Autonomous Prefecture 731100Gansu ProvinceChina

BACKGROUND The role of physical activity in diabetes is critical,influencing this disease's development,man-agement,and overall *** China,22.3%of adults do not meet the minimum level of physical activity recommended by the World Health ***,it is imperative to identify the factors that contributing to lack of physical activity must be *** To investigate the relationship among delay discounting,delay aversion,glycated hemoglobin(HbA1c),and various levels of physical activity in Chinese adults diagnosed with type 2 diabetes mellitus(T2DM).METHODS In 2023,400 adults with T2DM were recruited from the People's Hospital of Linxia Hui Autonomous Prefecture of Gansu Province.A face-to-face questionnaire was used to gather demographic data and details on physical activity,delay discounting,and delay *** addition,HbA1c levels were measured in all 400 *** primary independent variables considered were delay discounting and delay *** outcome variables included HbA1c levels and different intensity levels of physical activity,including walking,moderate physical activity,and vigorous physical *** linear regression models were utilized to assess the relationship between delay discounting,delay aversion,and HbA1c levels,along with the intensity of different physical activity measured in met-hours per *** After controlling for the sample characteristics,delay discounting was negatively associated with moderate physical activity(β=-2.386,95%CI:-4.370 to-0.401).Meanwhile,delay aversion was negatively associated with the level of moderate physical activity(β=-3.527,95%CI:-5.578 to-1.476)in the multiple linear regression model,with statistically significant *** Elevated delay discounting and increased delay aversion correlated with reduced levels of moderate physical *** suggests that delay discounting and aversion may influence engagement in moderate physical activity.

关键词： Type 2 diabetes mellitus Delay discounting Delay aversion Physical activity

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积雪增加对青藏高原高寒草甸土壤磷有效性的影响

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草业学报 2024年第7期33卷 205-214页

作者：谭湘蛟董逵才张华唐川川杨燕中国科学院、水利部成都山地灾害与环境研究所四川成都610299 三江源国家公园管理局生态监测信息中心青海西宁810003 青海省大通县东峡林场青海大通810100 中国科学院大学北京100049

积雪增加引起土壤水热变化,进而可能改变草地生态系统土壤磷循环过程。本研究以青藏高原多年冻土区高寒草甸为研究对象,采用积雪栅栏诱导方式模拟积雪增加,分析测试了对照和积雪增加处理下土壤表层的水热特征、土壤理化性质和磷酸酶活... 详细信息

积雪增加引起土壤水热变化,进而可能改变草地生态系统土壤磷循环过程。本研究以青藏高原多年冻土区高寒草甸为研究对象,采用积雪栅栏诱导方式模拟积雪增加,分析测试了对照和积雪增加处理下土壤表层的水热特征、土壤理化性质和磷酸酶活性、土壤磷的有效性和组分特征。结果表明:1)积雪增加提高了生长季(5-9月)浅层(0~10 cm)土壤温度和湿度;2)积雪增加在0~10 cm、10~20 cm土层显著增加了土壤中全磷、有效磷、Al-P含量,降低了有机磷和Ca_(2)-P含量,Ca_(8)-P含量在0~10 cm土层降低,在10~20 cm土层增加;3)冗余分析表明,影响土壤磷形态的关键因子为土壤全氮、有机质和土壤水热状态。积雪增加通过改变土壤全氮含量、有机质含量和水热状态等土壤理化性质和土壤磷酸酶活性,提高土壤有机磷矿化速率,促进Ca_(8)-P和Al-P等缓效磷源释放更多的磷,提高土壤磷有效性。

关键词：青藏高原积雪增加高寒草甸磷有效性

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Stability of Two-Component Bose-Einstein Condensates in Bessel Optical Lattices

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Communications in Theoretical Physics 2008年第6期49卷 1519-1526页

作者： CHEN Hai-Jun LI Hao-cai XUE Ju-kui College of Physics and Electronics Engineering Northwest Normal University Lanzhou 730070 China

The stability of the ground state of two-component Bose-Einstein condensates （BEGs） loaded into the central well of an axially symmetric Bessel lattices （BLs） potential with attractive or repulsive atoms interactions is studied using the time-dependent Gross-Pitaevskii equation （GPE）. By using the variational method, we find that stable ground state of two-component BEGs can exist in BLs. The BLs＇s depth and the intra-species atom interaction play an important role in the stability of ground state. The collapse of two-component BEGs in BLs is also studied and a collapse condition for trapped two-component BEGs is obtained. It is shown that the two-component BEGs exhibit rich collapse dynamics. That is, the two-component BEGs can collapse in the system with both intra- and inter-attractive, or with intra-attractive and inter-repulsive, or with intra-repulsive and inter-attractive atom interactions. Furthermore, the control of the collapse of the two-component BEGs in BLs is discussed in detail. The stability diagram of the ground state in parameter space is obtained. The results show that the collapse of two-component BEGs can be controlled by temporal modulation of the atom interaction.

关键词： two-component Bose-Einstein condensates Gross-Pitaevskii equation Bessel optical lattice ground state

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石棉尾矿场地土壤污染地球化学特征及其对微生物多样性的影响

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吉林大学学报（地球科学版） 2024年第3期54卷 980-992页

作者：李英钧宋泽峰杨悦锁邓亚男任弘宇蔡奎胡紫如青海省环境地质勘查局青海九零六工程勘察设计院有限责任公司西宁810007 河北地质大学资源与环境工程研究所石家庄050031 吉林大学新能源与环境学院长春130021 河北地质大学地质调查研究院石家庄050031 河北地质大学河北省战略性关键矿产资源重点实验室石家庄050031 河北地质大学水资源与环境学院石家庄050031

为了厘清石棉对土壤环境的污染风险,为进一步治理及减缓石棉污染危害提供技术支撑,本文针对青海省祁连县小八宝石棉尾矿库矿区场地土壤环境中石棉组分和相关重金属元素的分布、空间迁移转化规律及其对土壤微生物群落结构和多样性的影响... 详细信息

为了厘清石棉对土壤环境的污染风险,为进一步治理及减缓石棉污染危害提供技术支撑,本文针对青海省祁连县小八宝石棉尾矿库矿区场地土壤环境中石棉组分和相关重金属元素的分布、空间迁移转化规律及其对土壤微生物群落结构和多样性的影响开展研究。结果表明:场地土壤中的主要矿物组成包括石英、斜绿泥石、蛇纹石、铁韭闪石、钠长石等,其中蛇纹石被确定为石棉的特征矿物;在典型垂向和横向剖面土壤中,不同来源的重金属元素质量分数呈现不同的空间分布特点,其中CaO分布趋势与蛇纹石矿物相关,土壤中重金属Cr表现出与石棉矿物相似的分布特征;在垂向和横向剖面的样品中Cr质量分数均超过建设用地风险管制值(二类用地78 mg/kg),特别是在石棉尾矿渣堆处Cr质量分数远超出建设用地风险管制值。石棉的环境胁迫降低了土壤微生物多样性,对土壤微生物群落结构造成较大影响。

关键词：土壤石棉矿物重金属迁移转化分布特征

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工业区周边农田土壤重金属与黏土矿物的关系及其生态健康风险评价

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中国地质 2024年第5期51卷 1513-1526页

作者：李文鹏史小龙刘建章陈爽蔡奎宋泽峰田浩飞河北省地质矿产勘查开发局第六地质大队(河北省地质矿产勘查开发局航空测量应用中心) 河北石家庄050085 河北地质大学河北省战略性关键矿产资源重点实验室河北石家庄050031 河北地质大学资源与环境工程研究所河北石家庄050031 韩国群山大学地质科学与工程学院韩国全北573−701

【研究目的】为了解工业区周边农田土壤重金属污染状况,采集了100件表层土壤样品,分析测试Pb、Cr、As、Cd和Hg等5种重金属元素总量、赋存形态以及黏土矿物含量。【研究方法】采用单因子指数法、土壤矿物评价法以及健康风险评估模型等,... 详细信息

【研究目的】为了解工业区周边农田土壤重金属污染状况,采集了100件表层土壤样品,分析测试Pb、Cr、As、Cd和Hg等5种重金属元素总量、赋存形态以及黏土矿物含量。【研究方法】采用单因子指数法、土壤矿物评价法以及健康风险评估模型等,对石家庄无极皮革厂,辛集皮革厂,邯郸武安冶金、钢铁,广平化工厂,以及邢台内丘化工厂周边的农田土壤重金属污染状况、稳定性以及健康水平进行评价。【研究结果】无极皮革厂土壤的Cr,内丘、广平化工厂的Hg和武安冶金、钢铁的Cd和Hg污染程度高;以残渣态为主的重金属与黏土矿物具有显著正相关关系;土壤黏土矿物对Cd、Hg固持量高,对Pb和As的固持量低。无极2个土壤样品超出了黏土矿物对Cr的容纳能力;人体健康风险评估显示,在口和皮肤双重摄入途径下,土壤会对儿童造成非致癌风险(1.02)。但是,以小麦为摄入介质的癌症风险指数超过了成人(5.16×10^(−4))和儿童(6.44×10^(−4))的耐受限度(1×10^(−4))。【结论】重金属与黏土矿物存在积极的相关性,对生态健康风险影响大,当地以小麦为主食的居民对小麦Cd应更加关注。

关键词：工业区重金属赋存形态黏土矿物健康地质环境地质调查工程

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Effects of process parameters on periodic impact force exerting on cutting tool in ultrasonic vibration-assisted oblique turning

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Advances in Manufacturing 2022年第3期10卷 411-427页

作者： Long-Xu Yao Zhan-Qiang Liu Qing-Hua Song Bing Wang Yu-kui cai School of Mechanical Engineering Shandong UniversityJinan 250061People's Republic of China Key Laboratory of High Efficiency and Clean Mechanical Manufacture of Ministry of Education/Key National Demonstration Center for Experimental Mechanical Engineering Education Jinan 250061People's Republic of China

During ultrasonic vibration-assisted machining,the large impact force induced by tool-workpiece reengagement(TWR)is an important factor that affects tool ***,mechanical analysis into process factors that affect the impact force and their influencing mechanisms are ***,a prediction model for the instantaneous cutting force during both TWR and the stable turning process,which depends on the process parameters and material properties,is firstly proposed based on the kinematic and dynamic analysis of ultrasonic vibration-assisted oblique turning(UVAOT).The results calculated using the developed cutting force model agree well with the experimental results presented in the ***,the linear change law of the instantaneous cutting force with cutting time during the actual TWR is clarified using the proposed *** effect of the UVAOT process parameters on the average impact force during the periodic TWR process is discussed,and the influence mechanism is analyzed from the perspective of mechanics.A positive linear correlation is discovered between the feed speed and average impact *** ultrasonic amplitude and cutting speed do not significantly affect the average impact force of the new sharp cutting *** findings are consistent with the experimental observations of tool chipping and are applicable to select process parameters for reducing tool chipping during UVAOT.

关键词： Kinematics Dynamics Ultrasonic vibrationassisted oblique turning(UVAOT) Impact force Cutting force

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Nanocrystallization of Amorphous Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9 Irradiated by Laser

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Journal of Iron and Steel Research International 2005年第5期12卷 58-62页

作者： CHEN Sui-yuan LIU Chang-sheng ZHOU Li LI Hui-li cai Qing-kui Northeastern Univcrsity Shenyang 110004 China

The surface nanocrystallization of amorphous Fe73.5 Cu1Nb3Si13.5B9 radiated by CO2 laser was studied by means of M（oe）ssbauer spectroscopy, transmission electro iroscope and X-ray diffraction. The result shows that under certain technical conditions, nanocrystalline is fiound on the surface of amorphous Fe73.5 Cu1Nb3Si13.5B9 radiated by laser; the crystallization phase is α-Fe（Si） crystalline, and its size is about 10-20 nm; the nanocrystalline is uniformly distributed on amorphous base to keep the amorphous and crystallized phase in balance; the a mount of crystallization reaches 23% when the laser power is 300 W, the diameter of light spot is 20 mm, and the radiation speed is 20 mm/s. The phase balance can be controlled by adjusting the laser technology parameter. Laser radiation on the amorphous Fe73.5 Cu1Nb3Si13.5B9 alloy is an important technique for surface nanocrystallization of the amorphous alloys.

关键词： CO2 laser amorphous alloy Fe73.5 Cu1Nb3Si13.5B9 nanocrystallization

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一种高性能CMOS二级运算放大器的设计

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中国集成电路 2024年第7期33卷 50-56页

作者：邓鸿添蔡佳奎徐铫峰金豫浙扬州大学广陵学院机械电子工程系

基于0.18μm标准CMOS工艺设计了一款高性能的二级运算放大器,输入级采用pmos差分对输入的折叠式共源共栅结构,输出级采用共源级结构,两者级联实现双端输入单端输出;整个电路由带隙基准源提供稳定的偏置。在1.8V工作电压和0.9V共模电压... 详细信息

基于0.18μm标准CMOS工艺设计了一款高性能的二级运算放大器,输入级采用pmos差分对输入的折叠式共源共栅结构,输出级采用共源级结构,两者级联实现双端输入单端输出;整个电路由带隙基准源提供稳定的偏置。在1.8V工作电压和0.9V共模电压下进行仿真,该运放静态功耗为1.37mW,开环直流增益为117.36dB,相位裕度为77.73°,单位增益带宽100.4MHz(负载电容2pF),压摆率为51.24V/μs,共模抑制比为109.41dB,负电源抑制比为123.58dB,版图面积为180μm×253.5μm。仿真结果表明本文设计的电路结构稳定,性能优越。

关键词：折叠式共源共栅带隙基准高增益运算放大器

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心脏电生理医疗器械综合价值评估专家共识

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中国医学装备 2024年第7期21卷 1-16页

作者：中国医学装备协会应用评价分会蔡葵宣建伟中国医学装备协会应用评价分会北京100029 中山大学药学院医药经济研究所

心脏电生理医疗器械是诊断和治疗心律失常的关键手段,其组成复杂、种类较多。心律失常患者在诊治中经济负担较重,因此科学遴选符合临床使用和管理需求、价格合理的心脏电生理医疗器械至关重要。中国医学装备协会应用评价分会组织专家形... 详细信息

心脏电生理医疗器械是诊断和治疗心律失常的关键手段,其组成复杂、种类较多。心律失常患者在诊治中经济负担较重,因此科学遴选符合临床使用和管理需求、价格合理的心脏电生理医疗器械至关重要。中国医学装备协会应用评价分会组织专家形成以心脏电生理医疗器械临床使用和管理为基础的“心脏电生理医疗器械综合价值评估专家共识”,为医疗机构掌握心脏电生理医疗器械关键价值点提供参考依据。

关键词：心脏电生理医疗器械综合价值评估心律失常专家共识

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Toolpath Interpolation and Smoothing for Computer Numerical Control Machining of Freeform Surfaces: A Review

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International Journal of Automation and computing 2020年第1期17卷 1-16页

作者： Wen-Bin Zhong Xi-Chun Luo Wen-Long Chang Yu-kui cai Fei Ding Hai-Tao Liu Ya-Zhou Sun Centre for Precision Manufacturing Department of DesignManufacture&Engineering Management(DMEM)University of StrathclydeGlasgow G11XJUK Engineering and Physical Sciences Research Council(EPSRC)Future Metrology Hub Centre for Precision TechnologiesUniversity of HuddersfieldHuddersfield HD13DHUK School of Mechatronic Engineering Harbin Institute of TechnologyHarbin 150001China

Driven by the ever increasing demand in function integration,more and more next generation high value-added products,such as head-up displays,solar concentrators and intra-ocular-lens,etc.,are designed to possess freeform(i.e.,non-rotational symmetric)*** toolpath,composed of high density of short linear and circular segments,is generally used in computer numerical control(CNC)systems to machine those ***,the discontinuity between toolpath segments leads to high-frequency fluctuation of feedrate and acceleration,which will decrease the machining efficiency and product surface *** by the ever-increasing need for high-speed high-precision machining of those products,many novel toolpath interpolation and smoothing approaches have been proposed in both academia and industry,aiming to alleviate the issues caused by the conventional toolpath representation and interpolation *** paper provides a comprehensive review of the state-of-the-art toolpath interpolation and smoothing approaches with systematic *** advantages and disadvantages of these approaches are *** future research directions are also offered.

关键词： Computer numerical control(CNC) toolpath interpolation smoothing freeform surface

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