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The pseudoscalar meson and baryon octet interaction with strangeness S=-2 in the unitary coupled-channel approximation

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Communications in Theoretical Physics 2022年第7期74卷 99-104页

作者： bao-Xi sun Xin-Yu Liu Faculty of Science Beijing University of TechnologyBeijing 100124China

The interaction of the pseudo scalar meson and the b ary on octet with strangeness S=-2 and isospin I=1/2 is investigated by solving the Bethe-Salpeter equation in the infinite and finite volume *** is found that there is a resonance state generated dynamically,which owns a mass of about 1550 MeV and a large decay width of 120-200 *** resonance state couples strongly to theπΞ***,it might not correspond to theΞ(1620)particle announced by Belle *** the same time,this problem is studied in the finite volume,and an energy level at 1570 MeV is obtained,which is between theπΞand KΛthresholds and independent of the cubic box size.

关键词： Bethe-Salpeter equation chiral unitary approach amplitude

Rate Dependence of Serrated Flow and Its Effect on Shear Stability of Bulk Metallic Glasses

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Journal of Iron and Steel Research International 2016年第1期23卷 24-30页

作者： bao-an sun Chain-tsuan LIU Yong YANG Centre for Advanced Structural Materials Department of Mechanical and Biomedical EngineeringCity University of Hong Kong

The rate dependence of serrated flow and its effects on the stability of shear banding were systematically investigated in a prototypic bulk metallic *** was found that with the increase of external strain rate,the serrated flow is gradually suppressed and could completely disappear at a critical strain *** serration size,characterized by the mean stress drop amplitude,decreases inversely with the strain rate,while the waiting time for serration decreases with the strain rate in a power-law *** rate dependence of the serrated flow has important effects on the dynamics and stability of shear banding process,and leads to an optimal plasticity achieved around the critical strain rate for the disappearance of serrated *** results are discussed and interpreted in terms of the microscopic deformation theory and the stick-slip dynamics of shear banding for bulk metallic glasses.

关键词： serrated flow bulk metallic glass shear band ductility stick-slip

FORCE FEEDBACK DATAGLOVE BASED ON PNEUMATIC ARTIFICIAL MUSCLES

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Chinese Journal of Mechanical Engineering 2006年第4期19卷 588-593页

作者： bao Gang sun Zhongsheng WANG Zuwen Pneumatic Center Harbin institute of Technology Harbin 150001 China

An exoskeleton force feedback dataglove is developed, which uses the pneumatic artificial muscles as actuators. On the basis of the simplified hand model, the motion equation is deduced according to the theory of Denavit-Hartenberg. The model of the equivalent contact forces exerted by the object on the finger is proposed. By the principle of virtual work, the static equilibrium of finger is established. The force Jacobian matrix of finger is calculated, and then the joint torques of the finger when grasping objects are obtained. The theory and structure of the force feedback datagolve are introduced. Based on the theory of motion stabilization of four-bar linkage, the flexion angles of joints are measured. The torques on finger joints caused by the output forces of pneumatic artificial muscles are calculated. The output forces of pneumatic artificial muscle, whose values are controlled by its inner pressure, can be calculated by the joint torques of the finger when grasping objects. The arms of force, driving torques and the needed output forces of pneumatic muscle are calculated for each joint of the index finger. The criterion of output force of pneumatic muscle is given.

关键词： Force feedback dataglove Pneumatic artificial muscles Principle of virtual work Force Jacobian matrix

氯解磷定不同使用方式联合消旋山莨菪碱在急性有机磷中毒患者中的应用效果观察

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中国处方药 2024年第5期22卷 141-144页

作者：孙宝阳王洪侠孙旺东北京怀柔医院120急救分中心北京101400

目的观察氯解磷定不同使用方式联合消旋山莨菪碱在急性有机磷中毒患者中的应用效果。方法选取北京怀柔医院120急救分中心2018年6月~2023年6月纳入的95例急性有机磷中毒患者,按照随机数字法分为对照组(n=47)和观察组(n=48),其中对照组给... 详细信息

目的观察氯解磷定不同使用方式联合消旋山莨菪碱在急性有机磷中毒患者中的应用效果。方法选取北京怀柔医院120急救分中心2018年6月~2023年6月纳入的95例急性有机磷中毒患者,按照随机数字法分为对照组(n=47)和观察组(n=48),其中对照组给予氯解磷定2.0 g加入0.9%氯化钠注射液250 ml静脉滴注+阿托品治疗,观察组给予氯解磷定1.0 g负荷量缓脉静脉推注后再用氯解磷定1.0 g加入0.9%氯化钠注射液250 ml静脉滴注+阿托品+消旋山莨菪碱注射液治疗。比较两组患者的用药量、阿托品化时间、血气分析结果和治疗情况。结果治疗后,观察组患者的氯解磷定用药量大于对照组,观察组患者的阿托品用药量小于对照组,差异均有统计学意义(P<0.05)。治疗后,观察组患者的阿托品化时间、血气分析结果均优于对照组,且差异具有统计学意义(P<0.05)。治疗后,观察组患者的消化道出血率、死亡率和阿托品不良反应发生率均低于对照组,且差异具有统计学意义(P<0.05)。结论急性有机磷中毒患者采用氯解磷定1.0 g负荷量缓脉静脉推注后,再用氯解磷定1.0 g加入0.9%氯化钠注射液250 ml静脉滴注+阿托品+消旋山莨菪碱注射液治疗优于给予氯解磷定2.0 g加入0.9%氯化钠注射液250 ml静脉滴注+阿托品治疗,可以有效减少阿托品的用药量,降低死亡率和消化道出血率。

关键词：氯解磷定消旋山莨菪碱急性有机磷中毒应用效果

甲氧氯普胺联合苯海拉明对眩晕所致呕吐患者止吐效果的影响

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中国处方药 2024年第3期22卷 137-140页

作者：孙宝阳王洪侠孙旺东北京怀柔医院120急救分中心北京101400

目的探究甲氧氯普胺联合苯海拉明对眩晕所致呕吐患者止吐效果的影响。方法选取北京怀柔医院120急救分中心2020年6月~2023年6月经治的165例眩晕所致呕吐患者,按照随机数字法分为对照组(n=82)和研究组(n=83),其中对照组采用甲氧氯普胺进... 详细信息

目的探究甲氧氯普胺联合苯海拉明对眩晕所致呕吐患者止吐效果的影响。方法选取北京怀柔医院120急救分中心2020年6月~2023年6月经治的165例眩晕所致呕吐患者,按照随机数字法分为对照组(n=82)和研究组(n=83),其中对照组采用甲氧氯普胺进行治疗,研究组采用甲氧氯普胺联合苯海拉明进行治疗。比较两组患者治疗前后的眩晕症状、血压水平、生命体征指标以及末梢指血氧饱和度水平,评估止吐效果。结果治疗前,两组患者的眩晕症状评分比较,差异无统计学意义(P>0.05);治疗后,研究组的眩晕症状评分明显低于对照组,差异有统计学意义(P0.05),治疗后,研究组的SBP、DBP水平明显低于对照组,差异有统计学意义(P0.05),治疗后,研究组的HR、RR水平明显低于对照组,SpO_(2)水平明显高于对照组,差异有统计学意义(P<0.05);治疗后,研究组的总止吐有效率明显高于对照组,差异有统计学意义(P<0.05)。结论相较于甲氧氯普胺单一用药,甲氧氯普胺联合苯海拉明应用于眩晕所致呕吐患者止吐的效果更好,可有效改善患者的临床状况、生命体征,降低不良反应的发生。

关键词：甲氧氯普胺苯海拉明眩晕呕吐止吐

Dissipativity Analysis of Neural Networks with Time-varying Delays

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International Journal of Automation and computing 2008年第3期5卷 290-295页

作者： Yan sun bao-Tong Cui School of Communication and Control Engineering 3iangnan University Wuxi 3iangsu 214122 PI~C

A new definition of dissipativity for neural networks is presented in this paper. By constructing proper Lyapunov functionals and using some analytic techniques, sufficient conditions are given to ensure the dissipativity of neural networks with or without time-varying parametric uncertainties and the integro-differential neural networks in terms of linear matrix inequalities. Numerical examples are given to illustrate the effectiveness of the obtained results.

关键词： Neural network dissipativity Lyapunov functional

Aerosol flotation of low-grade refractory molybdenum ores

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International Journal of Minerals,Metallurgy and Materials 2012年第12期19卷 1077-1082页

作者： Tao Xu Chun-bao sun Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China

The characteristics of aerosol flotation, which include the effect of the concentration and particle size of kerosene aerosol on the molybdenum （Mo） flotation index and the effect of kerosene aerosol dosing method on the kerosene dosage and flotation time, were studied in the flotation of low-grade refractory molybdenum ores using kerosene aerosol. The results revealed that the particle size and concentration of kerosene aerosol had little effect on the Mo grade but had significant effect on the Mo recovery. A smaller particle size and a lower con-centration of kerosene aerosol were beneficial to the Mo aerosol flotation. For the received Mo ore samples, the optimized particle size of kerosene aerosol was 0.3-2 μm and the optimized aerosol concentration was 14 mg/L. The compressed air atomizer had a more uniform dis-tribution of aerosol particles than the ultrasonic atomizer, and the aerosol concentration was controlled easily, so the compressed air atomizer was more suitable for the research of aerosol flotation. Compared with conventional flotation in which kerosene was directly added into the ore pulp, the flotation time was reduced by ~30%, and the dosage was decreased by ~20% in aerosol flotation, while the Mo flotation index was similar.

关键词： molybdenum ore treatment flotation kerosene aerosols particle size

Optimization and mechanism of gold-bearing sulfide flotation

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Rare Metals 2014年第3期33卷 363-368页

作者： Zhong-Mei sun Chun-bao sun Ji-Zhen Wang Wan-Zhong Yin School of Civil and Environmental Engineering University of Science and Technology Beijing Zijin Research Institute of Mining and Metallurgy School of Materials & Metallurgy Northeastern University College of Zi Jin Mining Fuzhou University

In order to overcome the difficulty of extracting gold from gold-bearing sulfide ore by cyanide process flotation was adopted based on mineralogical analysis Mineralogy shows that gold particles are of superfine structure and mainly enclosed by sulfide ores. Primary gold-bearing sulfide ore is fine-grained pyrite and arsenopyrite. The paper describes the effects of ratios and dosage of activators and collectors on the recovery and grade of gold concentrate. A proper flotation flowsheet was then proposed based on experimental condition and closedcircuit test. The gold concentrate with the gold grade of25.14 g ton-1and the recovery of 86.94 % is obtained after one rougher, three cleaners, and four scavengers from fine grinding flotation process. Furthermore, the mechanisms of combined activators and combined collectors were studied by thermodynamic calculation, and structure-activity relationship of flotation reagent was also explained

关键词： Gold Pyrite Arsenopyrite Activator Combined reagent Flotation

Invariants for a Class of Nongeneric Three-Qubit States

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Communications in Theoretical Physics 2006年第6期45卷 1007-1010页

作者： sun bao-Zhi FEI Shao-Ming Department of Mathematics Capital Normal University Beijing 100037 China Max-Planck-Institute for Mathematics in the Sciences 04103 Leipzig Germany Department of Mathematics Qufu Normal University Qufu 273165 China

We investigate the equivalence of quantum states under local unitary transformations. A complete set of invariants under local unitary transformations are presented for a class of non-generic three-qubit mixed states. It is shown that two such states in this class are locally equivalent if and only if all these invariants have equal values for them.

关键词： invariant quantum state local unitary transformation