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血浆NT-proBNP与急性非ST段抬高心肌梗死患者冠脉病变严重程度的相关性研究

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系统医学 2024年第10期9卷 96-99页

作者：朱张国桂家晶杨娟李茂安顺市平坝区人民医院心内科贵州安顺561000

目的探讨急性非ST段抬高心肌梗死(Non-ST Elevation Myocardial Infarction,NSTEMI)患者血浆N端B型脑钠肽前体(N-terminal pro-B-type Natriuretic Peptide,NT-proBNP)与冠脉病变严重程度的相关性。方法选取2020年1.—2023年1.月安顺市平坝区人民医院心内科收治的54例行介入治疗的NSTEMI患者作为观察组,选取同期行冠脉造影检查结果正常的50例患者作为对照组,对两组患者的NT-proBNP进行检测比较,根据病变严重程度将观察组患者分为轻度病变组(1.例)、中度病变组(28例)和重度病变组(1.例),对3组患者的NT-proBNP进行比较,分析NT-proBNP与冠脉病变严重程度的相关性。结果观察组NT-proBNP水平(61..43±1.1.32)pg/mL明显高于对照组(76.43±1..43)pg/mL,差异有统计学意义(t=33.885,P1.。结论NSTEMI患者NT-proBNP水平与冠脉病变呈正相关,患者NT-proBNP水平可为患者的疾病严重程度和临床治疗提供指导。

关键词：急性心肌梗死冠脉病变程度 N末端B型脑钠肽前体相关性

经鼻烟壶桡动脉与常规桡动脉行冠脉介入治疗术在临床疗效中的对比研究

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系统医学 2024年第7期9卷 106-109页

作者：朱张国桂家晶杨娟李茂安顺市平坝区人民医院心内科贵州安顺561000

目的探讨经鼻烟壶桡动脉与常规桡动脉行冠脉介入治疗术在临床疗效中的对比研究。方法选取2022年6月—2023年1.月平坝区人民医院心内科收治的58例行冠脉介入治疗术的患者作为研究对象,用随机数表法分为对照组和研究组,各29例,对照组在常... 详细信息

目的探讨经鼻烟壶桡动脉与常规桡动脉行冠脉介入治疗术在临床疗效中的对比研究。方法选取2022年6月—2023年1.月平坝区人民医院心内科收治的58例行冠脉介入治疗术的患者作为研究对象,用随机数表法分为对照组和研究组,各29例,对照组在常规桡动脉行经皮冠脉介入治疗(Percutaneous Coronary Intervention,PCI),研究组在鼻烟壶桡动脉处介入PCI术治疗。对比两组临床疗效。结果两组患者造影剂所需量和手术耗时对比,差异无统计学意义(P均>0.05)。研究组住院时间和术后压迫时间短于对照组,差异有统计学意义(P均1..34%)低于对照组(27.59%),差异有统计学意义(χ^(2)=9.681.P<0.05)。结论经鼻烟壶桡动脉行冠脉介入治疗术相较于常规桡动脉临床疗效更加显著,不仅降低了患者的并发症发生率,还缩短了患者住院时间和术后压迫时间,改善了患者穿刺情况,安全可靠。

关键词：冠脉介入治疗术鼻烟壶桡动脉常规桡动脉临床疗效

α-Tocopherol Concentrations in Human Milk from Mothers of Preterm and Full-term Infants in China

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Biomedical and Environmental Sciences 1993年第3期6卷 259-262页

作者： ZHENGMing－Gi zhangguo－Feng 等 DepartmentofPediatrics GuilinmEDICALCollegeGuilinChina DepartmentofPediatrics GuilinmEDICALCollege

a-Tocopherol content in breast milk of 28 mothers who delivered preterm infants (preterm milk) and 43 mothers who delivered full-term infants (term milk) were measured, a-Tocopherol concentration in preterm milk did not differ significantly from that of term milk in the first 1. days of lactation (P>0.05). There is a higher a-tocopherol concentration in the early colostrum, however, it decreases with the lactational days significantly. The investigation suggests that early breast-feeding would be beneficial to the improvement of vitamin E intake in neonates during the early life.

关键词： Asia Biology China Comparative Studies Demographic Factors Developing Countries Eastern Asia Health Human Milk Infant Nutrition Lactation Maternal Physiology Nutrition Physiology Population Population Dynamics Pregnancy Pregnancy Outcomes Premature Birth Reproduction Research Report Studies Time Factors Vitamins

A Friction-Driven Strategy for Agile Steering Wheel Manipulation by Humanoid Robots

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Cyborg and Bionic Systems 2023年第1期4卷 14-27页

作者： Zhaoyang Cai Xin Zhu Pierre Gergondet Xuechao Chen zhangguo Yu School of Mechatronical Engineering Beijing Institute of TechnologyBeijingChina CNRS-AIST Joint Robotics Laboratory IRLTsukubaJapan

Vehicle driving can substantially enhance the maneuverability of humanoid *** steering wheel manipulation requires rapid rotation in narrow spaces such as a cab,serving as the foundation for increasing driving speed,especially in an obstacle avoidance ***,there are 3 human driving strategies,“Hand-to-Hand,”“Hand-over-Hand,”and“One-Hand.”Based on the human driving motion data,we quantitatively analyze these strategies from 3 aspects,motion range of joint combination,motion region of the shoulder,and velocity of the ***,a friction-driven manipulation strategy using one hand is proposed utilizing the similarity between a humanoid robot and a driver(human).It effectively addresses the requirements of both a small range of motion and rapid *** prevent the deformation of the steering wheel caused by excessive force,we construct an operating force model specifically for the steering *** model accurately describes the relationship between the rotation resistance and the state of the steering *** addition,we propose a quadratic programming(QP)-based control framework to servo the robot to track the end-effector position and target wrench output by this ***,the effectiveness of this paper is evaluated through an obstacle avoidance scenario,achieving a maximum rotation velocity of 3.1. rad/s.

关键词： robot driving rotation

Trajectory-free dynamic locomotion using key trend states for biped robots with point feet

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Science China(Information Sciences) 2023年第8期66卷 263-264页

作者： Lianqiang HAN Xuechao CHEN zhangguo YU Xishuo ZHU Kenji HASHIMOTO Qiang HUANG School of Mechatronical Engineering Beijing Institute of Technology Key Laboratory of Biomimetic Robots and Systems Ministry of Education Intelligent Mine Research Institute China Coal Research Institute Co. Ltd. Department of Mechanical Engineering Informatics Meiji University Humanoid Robotics Institute (HRI) Waseda University

Dear editor,Biped robots can not only cross complex environment such as ravines and rocks [1., but can also interact in more diverse activities with people. A biped robot with point feet is called an underactuated bip... 详细信息

关键词： Trajectories

Advances in Research on the Approaches of Improving Water Utilization Efficiency in Rice

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Agricultural Sciences in China 2005年第1期4卷 65-74页

作者： ZHANGMing-sheng HUANGYou-zhong zhangguo-ping AgronomyDepartment ZhejiangUniversityHangzhou310029P.R.China

Water shortage is increasingly an important factor limiting the sustainable development of global economy, posing a hugethreat to social security and human existence. Water usage in agriculture accounts for about 70% of total water consumptionin the world, and rice cultivation is in turn the largest water user, which accounts for about 50% of total water usage inagriculture. Therefore, it is quite important to improve water utilization efficiency to reduce water consumption in *** stress causes severe inhibition of plant growth and development as well as yield reduction, however the extent ofinhibition or reduction varies greatly with the growth stages, duration and severity of stress, and plant genotypes. In rice,drought resistance and water utilization efficiency might be improved by developing stress resistant cultivars and conductingproper agronomic practices. It is hence imperative to determine the suitable criteria in morphological and physiologicaltraits for drought resistance and water utilization efficiency in conventional breeding of rice. At present, leaf rolling, leafwater potential and carbon isotope discrimination are commonly used criteria for the evaluation and identification ofgermplasm with high drought resistance or water utilization efficiency. With rapid development of molecular biology,marker-assisted selection has been used in rice breeding against water stress. In this review, therefore, the agronomicaspect of water saving techniques such as selection of suitable rice cultivars, planting pattern, mulching, deficit irrigationand alternative drying and moist irrigation are discussed and effective approaches are also recommended.

关键词： Water management Water-saving Rice Drought-resistance Water utilization efficiency

Seed Health Status of Sweet Corn (Zea mays L. saccharata Sturt) from Five Areas in China and Effect on Field Seedling Emergence

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Agricultural Sciences in China 2005年第5期4卷 329-335页

作者： ZHAOGuang-wu zhangguo-zhen WANGJian-hua DepartmentofSeedScience ChinaAgriculturalUniversityBeijing100094P.R.China DepartmentofPlantPathology ChinaAgriculturalUniversityBeijing100094P.R.China

The health status of 1. sweet corn (Zea mays L. saccharata Sturt) hybrids classified to two types, collected from five areas in China, was examined by PDA method, and factors influencing seed health and relationships between seed health and field seedling emergence were studied. Seventeen fungal genera were isolated and Fusarium was the most frequently isolated. There were significant differences both in incidence of Fusarium and in percentage of infected seeds among 1. hybrids. Research also showed that significant and consistent differences both in seed-borne fungal taxa and in percentage of infected seeds existed between two types of sweet corn. Sugar enhanced corn is more slightly infected than super sweet corn both in fungal taxa (1. and 1., respectively) and in percentage of infected seeds (62.0 and 79.2%, respectively). There were also significant differences both in seed-borne fungal taxa and in percentage of infected seeds among five areas. Seeds from South China were most severely infected, for there were 1. fungal genera detected and the percentage of infected seeds was highly 99.1. while those from Northwest China were slightly infected, for there were 1. fungal genera detected and the percentage of infected seeds was only 1..3%. Further research showed that there were significant negative correlations both between incidence of Fusarium and percentage of field seedling emergence and between percentage of infected seeds and percentage of field seedling emergence. Percentage of field seedling emergence could be estimated by regression equations built by regression analysis.

关键词： Sweet corn Five areas Seed health Field seedling emergence

Rapid prediction of floating and sinking components of raw coal

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International Journal of Mining Science and Technology 2012年第5期22卷 735-738页

作者： Wang Guanghui Kuang Yali Wang zhangguo Ji Li Wang Ying School of Chemical Engineering and Technology China University of Mining & Technology Xuzhou 221008 China

A model that rapidly predicts the density components of raw coal is *** is based on a threegrade fast float/sink *** recent comprehensive monthly floating and sinking data are used for *** predicted data are used to draw washability curves and to provide a rapid evaluation of the effect from heavy medium induced ***-one production shifts worth of fast float/sink data and the corresponding quick ash data are used to verify the *** results show a small error with an arithmetic average of 0.53 and an absolute average error of *** indicates that this model has high *** theoretical yield from the washability curves is 76.47% for the monthly comprehensive data and 81.31. using the model *** is for a desired cleaned coal ash of 9%.The relative error between these two is 6.33%,which is small and indicates that the predicted data can be used to rapidly evaluate the separation effect of gravity separation equipment.

关键词： Raw coal Floating and sinking components Fast floating and sinking data Predicting model

Explosive Electric Actuator and Control for Legged Robots

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Engineering 2022年第5期8卷 39-47页

作者： Fei Meng Qiang Huang zhangguo Yu Xuechao Chen Xuxiao Fan Wu Zhang Aiguo Ming School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Biomimetic Robots and Systems Ministry of EducationBeijing 100081China Department of Mechanical and Intelligent Systems Engineering The University of Electro-CommunicationsTokyo 182-8585Japan

Unmanned systems such as legged robots require fast-motion responses for operation in complex *** systems therefore require explosive actuators that can provide high peak speed or high peak torque at specific moments during dynamic *** hydraulic actuators can provide a large force,they are relatively inefficient,large,and *** electric actuators are incapable of providing instant high *** addition,the constant reduction ratio of the reducer makes it difficult to eliminate the tradeoff between high speed and high torque in a given *** study proposes an explosive electric actuator and an associated control method for legged ***,a high-power-density variable transmission is designed to enable continuous adjustment of the output speed to torque ratio.A heat-dissipating structure based on a composite phase-change material(PCM)is *** integral torque control method is used to achieve periodic and controllable explosive power *** experiments are conducted with typical legged robots to verify the effectiveness of the proposed actuator and control ***-legged,quadruped,and humanoid robots jumped to heights of 1.5,0.8,and 0.5 m,*** are the highest values reported to date for legged robots powered by electric actuators.

关键词： Electric actuator Variable transmission Integral torque control Legged robot