In order to solve the problem of high computing cost and low simulation accuracy caused by discontinuity of incision in traditional meshless model,this paper proposes a soft tissue deformation model based on the Marqu...In order to solve the problem of high computing cost and low simulation accuracy caused by discontinuity of incision in traditional meshless model,this paper proposes a soft tissue deformation model based on the Marquardt algorithm and enrichment function.The model is based on the element-free Galerkin method,in which Kelvin viscoelastic model and adjustment function are integrated.Marquardt algorithm is applied to fit the relation between force and displacement caused by surface deformation,and the enrichment function is applied to deal with the discontinuity in the meshless method.To verify the validity of the model,the Sensable Phantom Omni force tactile interactive device is used to simulate the deformations of stomach and heart.Experimental results show that the proposed model improves the real-time performance and accuracy of soft tissue deformation simulation,which provides a new perspective for the application of the meshless method in virtual surgery.展开更多
Objective: To investigate the effect of Dan seven soft capsule on the treatment of acute hemorrhagic cerebrovascular disease and the influence of serum inflammatory factors, coagulation function and blood rheology ind...Objective: To investigate the effect of Dan seven soft capsule on the treatment of acute hemorrhagic cerebrovascular disease and the influence of serum inflammatory factors, coagulation function and blood rheology indexes. Methods: A total of 112 cases of patients with acute hemorrhagic cerebrovascular disease, according to the random data table were divided into the control group (n=57) and observation group (n=55), the patients in the control group received routine treatment combined with edaravone, on the basis of the treatment of the control group, the observation group was treated with Dan seven soft capsule. The serum levels of inflammatory factors, coagulation function and blood rheology indexes were compared between the two groups before and after treatment. Results: Before treatment, there were no significant difference in the inflammatory factors (hs-CRP, TNF-α and IL-6), blood coagulation function (FIB, PT and APTT) and hemorheology (high cut whole blood viscosity, low cut whole blood viscosity and plasma viscosity) levels between the control group and observation group. Compared with the levels of the same group before treatment, two groups of hs-CRP, TNF-α, IL-6, FIB, high cut whole blood viscosity, low cut whole blood viscosity and plasma viscosity level after treatment were significantly decreased, and levels in the observation group were significantly lower than those in the control group;Compared with the group before treatment, the levels of PT and APTT in the two groups were significantly increased, and the observation group was significantly higher than the control group. Conclusion: Dan seven soft capsule in the treatment of acute hemorrhagic cerebrovascular disease can effectively reduce the level of serum inflammatory factors, improve coagulation function and blood rheology index, it has an important clinical value.展开更多
Polymer science continues to play a transformative role in materials innovation,enabling breakthroughs across diverse domains including energy storage,flexible electronics,surface engineering,and soft robotics.At the ...Polymer science continues to play a transformative role in materials innovation,enabling breakthroughs across diverse domains including energy storage,flexible electronics,surface engineering,and soft robotics.At the heart of these advances lies a critical,often defining factor:the interface.Whether between polymers and solid substrates,liquids,gases,or other polymers,interfacial phenomena govern adhesion,wetting,energy dissipation,chemical reactivity,and signal transmission.Interfaces are not passive boundaries but active zones of complexity and function,where molecular interactions shape material performance at every scale—from nanometers to entire devices.展开更多
Objective: To observe the therapeutic effect of Xuesaitong soft capsule(血塞通软胶囊, XST)and its effect on platelet counts, coagulation factor 1 (CF1) as well as hemorrheologic indexes in treating patients with acute...Objective: To observe the therapeutic effect of Xuesaitong soft capsule(血塞通软胶囊, XST)and its effect on platelet counts, coagulation factor 1 (CF1) as well as hemorrheologic indexes in treating patients with acute cerebral infarction (ACI). Methods: Two hundred and four patients with ACI were assigned into two groups, the control group (n=96) and the treated group (n=108). They were all treated with conventional Western medicines, including mannitol, troxerutin, citicoline, piracetam and aspirin, while to the treated group, XST was given additionally through oral intake, twice a day, 2 capsules each time for 8 successive weeks. The clinical efficacy was evaluated according to the nerve function deficits scoring and the changes of platelet count. CF1 and hemorrheological indexes were measured before and after treatment.Results: The total effective rate was 87.0% in the treated group, and 87.5% in the control group, respectively, showing insignificant difference between them. But the markedly effective rate in the treated group ( 66.7%) was significantly higher than that in the control group (27.1%, P<0.01). The count of platelet was not changed significantly in both groups after treatment, while CF1 in them evidently lowered at the end of the 4th and 8th weeks of treatment, but showed insignificant difference between the two groups. The hematocrit, whole blood viscosity and plasma viscosity in both groups were all improved significantly after treatment, but also showed insignificant difference in comparison of the two groups. Conclusion: XST has good efficacy in auxiliary treatment of patients with ACI, though its mechanism remains to be further explored.展开更多
An improved immune algorithm is proposed in this paper. The problems, such as convergence speed and optimization precision, existing in the basic immune algorithm are well addressed. Besides, a fuzzy adaptive method i...An improved immune algorithm is proposed in this paper. The problems, such as convergence speed and optimization precision, existing in the basic immune algorithm are well addressed. Besides, a fuzzy adaptive method is presented by using the fuzzy system to realize the adaptive selection of two key parameters （possibility of crossover and mutation）. By comparing and analyzing the results of several benchmark functions, the performance of fuzzy immune algorithm （FIA） is approved. Not only the difficulty of parameters selection is relieved, but also the precision and stability are improved. At last, the FIA is ap- plied to optimization of the structure and parameters in radial basis function neural network （RBFNN） based on an orthogonal sequential method. And the availability of algorithm is proved by applying RBFNN in modeling in soft sensor of solvent tower.展开更多
Chemical reactivity towards electron transfer is captured by the Fukui function.However,this is not well defined when the system or its ions have degenerate or pseudo-degenerate ground states.In such a case,the first-...Chemical reactivity towards electron transfer is captured by the Fukui function.However,this is not well defined when the system or its ions have degenerate or pseudo-degenerate ground states.In such a case,the first-order chemical response is not independent of the perturbation and the correct response has to be computed using the mathematical formalism of perturbation theory for degenerate states.Spatialpseudo-degeneracy is ubiquitous in nanostructures with high symmetry and totally extended systems.Given the size of these systems,using degenerate-state perturbation theory is impractical because it requires the calculation of many excited states.Here we present an alternative to compute the chemical response of extended systems using models of local softness in terms of the local density of states.The local softness is approximately equal to the density of states at the Fermi level.However,such approximation leaves out the contribution of inner states.In order to include and weight the contribution of the states around the Fermi level,a model inspired by the long-range behavior of the local softness is presented.Single wall capped carbon nanotubes(SWCCNT)illustrate the limitation of the frontier orbital theory in extended systems.Thus,we have used a C360 SWCCNT to test the proposed model and how it compares with available models based on the local density of states.Interestingly,a simple Hückel approximation captures the main features of chemical response of these systems.Our results suggest that density-of-states models of the softness along simple tight binding Hamiltonians could be used to explore the chemical reactivity of more complex system,such a surfaces and nanoparticles.展开更多
In this article,we apply classical density functional theory to investigate the characteristics of depletion interaction in Lennard-Jones(LJ)binary fiuid mixtures.First,to confirm the validity of our adopted density f...In this article,we apply classical density functional theory to investigate the characteristics of depletion interaction in Lennard-Jones(LJ)binary fiuid mixtures.First,to confirm the validity of our adopted density functional formalism,we calculate the radial distribution functions using a theoretical approach and compare them with results obtained by molecular dynamics simulation.Then,this approach is applied to two colloids immersed in LJ solvent systems.We investigate the variation of depletion interaction with respect to the distance of two colloids in LJ binary systems.We find that depletion interaction may be attractive or repulsive,mostly depending on the bulk density of the solvent and the temperature of the binary system.For high bulk densities,the repulsive barrier of depletion force is remarkable when the total excluded volume of colloids touches each other and reaches a maximum.The height of the repulsive barrier is related to the parameters of the LJ potential and bulk density.Moreover,the depletion force may exhibit attractive wells if the bulk density of the solvent is low.The attractive well tends to appear when the surface-surface distance of colloids is half of the size of the polymer and deepens with temperature lowering in a fixed bulk density.In contrast with the hard-sphere system,no oscillation of depletion potential around zero is observed.展开更多
In recent times,internet of things(IoT)applications on the cloud might not be the effective solution for every IoT scenario,particularly for time sensitive applications.A significant alternative to use is edge computi...In recent times,internet of things(IoT)applications on the cloud might not be the effective solution for every IoT scenario,particularly for time sensitive applications.A significant alternative to use is edge computing that resolves the problem of requiring high bandwidth by end devices.Edge computing is considered a method of forwarding the processing and communication resources in the cloud towards the edge.One of the considerations of the edge computing environment is resource management that involves resource scheduling,load balancing,task scheduling,and quality of service(QoS)to accomplish improved performance.With this motivation,this paper presents new soft computing based metaheuristic algorithms for resource scheduling(RS)in the edge computing environment.The SCBMARS model involves the hybridization of the Group Teaching Optimization Algorithm(GTOA)with rat swarm optimizer(RSO)algorithm for optimal resource allocation.The goal of the SCBMA-RS model is to identify and allocate resources to every incoming user request in such a way,that the client’s necessities are satisfied with the minimum number of possible resources and optimal energy consumption.The problem is formulated based on the availability of VMs,task characteristics,and queue dynamics.The integration of GTOA and RSO algorithms assist to improve the allocation of resources among VMs in the data center.For experimental validation,a comprehensive set of simulations were performed using the CloudSim tool.The experimental results showcased the superior performance of the SCBMA-RS model interms of different measures.展开更多
An explicit form of the elastic strain-energy function for direction-dependent large elastic strain behaviors of soft fiber-reinforced composites is first presented based upon a decoupled approach for simulating compl...An explicit form of the elastic strain-energy function for direction-dependent large elastic strain behaviors of soft fiber-reinforced composites is first presented based upon a decoupled approach for simulating complex nonlinear coupling effects.From this form,the exact closed-form solutions are then obtained for the uniaxial tension responses in the fiber and cross-fiber directions.With such exact solutions,the issue of simultaneously simulating strongly coupling nonlinear responses in the fiber and cross-fiber directions may be reduced to the issue of separately treating each decoupled uniaxial stress-strain response,thus bypassing usual complexities and uncertainties involved in identifying a large number of strongly coupled adjustable parameters.The numerical examples given are in good agreement with the experimental data for large strain responses.展开更多
By studying the relationship between physical structure and function in physical chemistry, the author breaks through the limitation of the western narrow social and cultural structure and function theory, and further...By studying the relationship between physical structure and function in physical chemistry, the author breaks through the limitation of the western narrow social and cultural structure and function theory, and further derives and founds the Confucian cultural structure and function theory, thus creating a new research methodology and broadening the research horizon. Through the research, it is found that the Confucian culture structure consists of the hard structure ＂ritual＂ and the soft structure ＂benevolence＂, and based on this constructs three-outline, five- principal, four-moral, eight- virtul, five cardinal principals and other Confucian culture, so that these have a social management function, resulting in a 2000-year stable Chinese social order, which also provides reference for the social management of Chinese government today.展开更多
Shanghai is located in eastern China and is built on overburden soil layers. It can be seen from the Mexico M S=8.1 earthquake on September 19, 1985 and the Hanshin M S=7.4 earthquake on January 17,1995 that heavy cas...Shanghai is located in eastern China and is built on overburden soil layers. It can be seen from the Mexico M S=8.1 earthquake on September 19, 1985 and the Hanshin M S=7.4 earthquake on January 17,1995 that heavy casualties and property losses have a direct relationship with overburden soil layers. Ground motions caused by earthquakes are significantly amplified when passing through the soil layers. Under the influence of these amplified motions, building structures, whose nature frequency is within the frequency band of soil amplification response, will experience more severe damage than those built on bedrock. Therefore, engineering seismologists have paid considerable attention the amplification responses in the Shanghai overburden soil layers. The amplification responses of soil and sand layers in this paper are given by the M L=4.1 earthquake in Nantong, Jiangsu Province on December 25, 2001 at 31.8° N, 120.9° E. It can be seen that the responses of soil and sand layers are very different. That is important.展开更多
为解决碳化硅金属氧化物半导体场效应晶体管(SiC Metal Oxide Semiconductor Field Effect Transistor,SiC MOSFET)硬开关故障(Hard Switch Fault,HSF)、负载故障(Fault Under Load,FUL)和过载故障(OverLoad fault,OL)的问题,本文提出...为解决碳化硅金属氧化物半导体场效应晶体管(SiC Metal Oxide Semiconductor Field Effect Transistor,SiC MOSFET)硬开关故障(Hard Switch Fault,HSF)、负载故障(Fault Under Load,FUL)和过载故障(OverLoad fault,OL)的问题,本文提出了一种基于SiC MOSFET漏极电压和源极电压检测的过流保护方法(OverCurrent Protection method based on the Drain-voltage and Source-voltage Detection,DSD-OCP).该方法通过检测电路实时监控SiC MOSFET的漏极电压和源极电压来准确识别短路故障和过载故障,并利用驱动电路控制SiC MOSFET的开通和关断,从而实现快速短路保护和自适应过载保护,同时还集成软关断功能.基于0.5μm双极型-互补金属氧化物半导体-双扩散金属氧化物半导体(Bipolar-CMOS-DMOS,BCD)工艺,设计了DSD-OCP电路并进行流片,芯片面积为2.8 mm^(2).采用研制的芯片搭建1200 V/80 mΩSiC MOSFET测试平台,并验证了DSD-OCP方法的有效性.实验结果表明,SiC MOSFET在DSD-OCP芯片保护下的HSF和FUL持续时间分别为88 ns和105 ns.在不同母线电压下,DSD-OCP芯片能够为SiC MOSFET提供自适应的过载保护.因DSD-OCP芯片具有软关断功能,SiC MOSFET在过流保护时的漏极电压过冲不超过110 V.展开更多
Requirements elicitation step is of paramount importance in the requirements engineering process. In the distributed environment of so-called inter-company cooperative information system, this step is a thorny issue. ...Requirements elicitation step is of paramount importance in the requirements engineering process. In the distributed environment of so-called inter-company cooperative information system, this step is a thorny issue. To elicit require-ments for an inter-company cooperative information system, we early proposed a methodology called MAMIE (from MAcro to MIcro level requirements Elicitation) with an accompanied tool. In MAMIE methodology, requirements are the result of composing functional and non-functional concerns. Before non-functional concerns composition, it’s primary to identify relationships between them. According to the most existing approaches, a non-functional concern may have a negative, positive or null contribution on the other non-functional concerns. In this paper, we argue that using only these three contributions types is not sufficient to express relationships which may exist between non-functional concerns. Thus, we propose a process which aims to identify non-functional concerns’ relationships and model them using a fuzzy cognitive map. The resulting model is composed of non-functional concerns, relationships between them and the weight of these relationships expressed with linguistics fuzzy values. Using fuzzy cognitive maps to model non-functional concerns relationships allows moving from the conventional modelling toward developing a computer based model. An example from the textile industry is used to illustrate the applicability of our process.展开更多
目的观察银丹心脑通软胶囊联合静脉溶栓治疗老年急性脑梗死患者的临床疗效及对其神经功能、血液流变学的影响。方法选取2020年2月—2023年2月期间徐州市中心医院(徐州医科大学附属徐州临床学院)神经内科收治的老年急性脑梗死患者100例,...目的观察银丹心脑通软胶囊联合静脉溶栓治疗老年急性脑梗死患者的临床疗效及对其神经功能、血液流变学的影响。方法选取2020年2月—2023年2月期间徐州市中心医院(徐州医科大学附属徐州临床学院)神经内科收治的老年急性脑梗死患者100例,采用1∶1匹配病例对照研究方法分为对照组和治疗组,每组各50例。两组患者均予以静脉溶栓治疗,静脉溶栓当天对照组开始应用安慰剂,治疗组联用银丹心脑通软胶囊。治疗3个月后,观察比较两组患者临床疗效、不良反应情况,治疗前后美国国立卫生研究院卒中量表(National institute of health stroke scale,NIHSS)评分、神经功能指标[中枢神经特异蛋白(S100 beta protein,S100β)、神经元特异性烯醇化酶(Neuron-specific enolase,NSE)]、血液流变学指标[全血高切黏度(Whole high viscosity,WHV)、全血低切黏度(Low shear whole blood viscosity,LWV)及血浆黏度(Plasma viscosity,PV)]、脑动脉血流指标[动脉收缩期峰值流速(Peak systolic velocity,PSV)、舒张末期血流速度(End-diastolic velocity,EDV)、平均血流速度(Mean velocity,Vm)]。结果治疗后两组患者NIHSS评分及血清S100β、NSE水平均较治疗前降低,差异有统计学意义(P<0.05);且治疗组NIHSS评分及血清S100β、NSE水平均较对照组明显降低,差异有统计学意义(P<0.05)。治疗后两组患者WHV、LWV及PV指标均较治疗前降低,差异有统计学意义(P<0.05);且治疗组WHV、LWV及PV指标均较对照组明显降低,差异有统计学意义(P<0.05)。治疗后两组患者PSV、EDV及Vm水平均较治疗前升高,差异有统计学意义(P<0.05);且治疗组PSV、EDV及Vm水平均较对照组明显升高,差异有统计学意义(P<0.05)。治疗后治疗组治疗总有效率98.00%(49/50)明显高于对照组78.00%(39/50),差异有统计学意义(P<0.05)。治疗期间,两组患者不良反应发生率比较,差异无统计学意义(P>0.05)。结论银丹心脑通软胶囊联合静脉溶栓治疗老年急性脑梗死患者可明显改善血液高凝状态,增加脑组织血流灌注,改善神经功能,提高治疗效果。展开更多
基金This work was supported,in part,by the National Nature Science Foundation of China under grant numbers 61502240,61502096,61304205,61773219in part,by the Natural Science Foundation of Jiangsu Province under grant number BK20191401+1 种基金in part,by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)fundin part,by the Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET)fund.
文摘In order to solve the problem of high computing cost and low simulation accuracy caused by discontinuity of incision in traditional meshless model,this paper proposes a soft tissue deformation model based on the Marquardt algorithm and enrichment function.The model is based on the element-free Galerkin method,in which Kelvin viscoelastic model and adjustment function are integrated.Marquardt algorithm is applied to fit the relation between force and displacement caused by surface deformation,and the enrichment function is applied to deal with the discontinuity in the meshless method.To verify the validity of the model,the Sensable Phantom Omni force tactile interactive device is used to simulate the deformations of stomach and heart.Experimental results show that the proposed model improves the real-time performance and accuracy of soft tissue deformation simulation,which provides a new perspective for the application of the meshless method in virtual surgery.
文摘Objective: To investigate the effect of Dan seven soft capsule on the treatment of acute hemorrhagic cerebrovascular disease and the influence of serum inflammatory factors, coagulation function and blood rheology indexes. Methods: A total of 112 cases of patients with acute hemorrhagic cerebrovascular disease, according to the random data table were divided into the control group (n=57) and observation group (n=55), the patients in the control group received routine treatment combined with edaravone, on the basis of the treatment of the control group, the observation group was treated with Dan seven soft capsule. The serum levels of inflammatory factors, coagulation function and blood rheology indexes were compared between the two groups before and after treatment. Results: Before treatment, there were no significant difference in the inflammatory factors (hs-CRP, TNF-α and IL-6), blood coagulation function (FIB, PT and APTT) and hemorheology (high cut whole blood viscosity, low cut whole blood viscosity and plasma viscosity) levels between the control group and observation group. Compared with the levels of the same group before treatment, two groups of hs-CRP, TNF-α, IL-6, FIB, high cut whole blood viscosity, low cut whole blood viscosity and plasma viscosity level after treatment were significantly decreased, and levels in the observation group were significantly lower than those in the control group;Compared with the group before treatment, the levels of PT and APTT in the two groups were significantly increased, and the observation group was significantly higher than the control group. Conclusion: Dan seven soft capsule in the treatment of acute hemorrhagic cerebrovascular disease can effectively reduce the level of serum inflammatory factors, improve coagulation function and blood rheology index, it has an important clinical value.
文摘Polymer science continues to play a transformative role in materials innovation,enabling breakthroughs across diverse domains including energy storage,flexible electronics,surface engineering,and soft robotics.At the heart of these advances lies a critical,often defining factor:the interface.Whether between polymers and solid substrates,liquids,gases,or other polymers,interfacial phenomena govern adhesion,wetting,energy dissipation,chemical reactivity,and signal transmission.Interfaces are not passive boundaries but active zones of complexity and function,where molecular interactions shape material performance at every scale—from nanometers to entire devices.
文摘Objective: To observe the therapeutic effect of Xuesaitong soft capsule(血塞通软胶囊, XST)and its effect on platelet counts, coagulation factor 1 (CF1) as well as hemorrheologic indexes in treating patients with acute cerebral infarction (ACI). Methods: Two hundred and four patients with ACI were assigned into two groups, the control group (n=96) and the treated group (n=108). They were all treated with conventional Western medicines, including mannitol, troxerutin, citicoline, piracetam and aspirin, while to the treated group, XST was given additionally through oral intake, twice a day, 2 capsules each time for 8 successive weeks. The clinical efficacy was evaluated according to the nerve function deficits scoring and the changes of platelet count. CF1 and hemorrheological indexes were measured before and after treatment.Results: The total effective rate was 87.0% in the treated group, and 87.5% in the control group, respectively, showing insignificant difference between them. But the markedly effective rate in the treated group ( 66.7%) was significantly higher than that in the control group (27.1%, P<0.01). The count of platelet was not changed significantly in both groups after treatment, while CF1 in them evidently lowered at the end of the 4th and 8th weeks of treatment, but showed insignificant difference between the two groups. The hematocrit, whole blood viscosity and plasma viscosity in both groups were all improved significantly after treatment, but also showed insignificant difference in comparison of the two groups. Conclusion: XST has good efficacy in auxiliary treatment of patients with ACI, though its mechanism remains to be further explored.
文摘An improved immune algorithm is proposed in this paper. The problems, such as convergence speed and optimization precision, existing in the basic immune algorithm are well addressed. Besides, a fuzzy adaptive method is presented by using the fuzzy system to realize the adaptive selection of two key parameters （possibility of crossover and mutation）. By comparing and analyzing the results of several benchmark functions, the performance of fuzzy immune algorithm （FIA） is approved. Not only the difficulty of parameters selection is relieved, but also the precision and stability are improved. At last, the FIA is ap- plied to optimization of the structure and parameters in radial basis function neural network （RBFNN） based on an orthogonal sequential method. And the availability of algorithm is proved by applying RBFNN in modeling in soft sensor of solvent tower.
基金FONDECYT grants 1140313 and 11150164.CC and PFFinanciamiento Basal para CentrosCientíficos y Tecnológicos de Excelencia-FB0807+2 种基金project RC-130006 CILISthe Fondo de Innovación para la Competitividad del Ministeriode Economía,Fomento y Turismo de Chile.MMCONICYT through grant 21130691.
文摘Chemical reactivity towards electron transfer is captured by the Fukui function.However,this is not well defined when the system or its ions have degenerate or pseudo-degenerate ground states.In such a case,the first-order chemical response is not independent of the perturbation and the correct response has to be computed using the mathematical formalism of perturbation theory for degenerate states.Spatialpseudo-degeneracy is ubiquitous in nanostructures with high symmetry and totally extended systems.Given the size of these systems,using degenerate-state perturbation theory is impractical because it requires the calculation of many excited states.Here we present an alternative to compute the chemical response of extended systems using models of local softness in terms of the local density of states.The local softness is approximately equal to the density of states at the Fermi level.However,such approximation leaves out the contribution of inner states.In order to include and weight the contribution of the states around the Fermi level,a model inspired by the long-range behavior of the local softness is presented.Single wall capped carbon nanotubes(SWCCNT)illustrate the limitation of the frontier orbital theory in extended systems.Thus,we have used a C360 SWCCNT to test the proposed model and how it compares with available models based on the local density of states.Interestingly,a simple Hückel approximation captures the main features of chemical response of these systems.Our results suggest that density-of-states models of the softness along simple tight binding Hamiltonians could be used to explore the chemical reactivity of more complex system,such a surfaces and nanoparticles.
基金supported by the National Natural Science Foundation of China(Grant No.11504384)the Fund of State Key Laboratory of Multiphase Complex Systems(No.MPCS-2017-A-04)。
文摘In this article,we apply classical density functional theory to investigate the characteristics of depletion interaction in Lennard-Jones(LJ)binary fiuid mixtures.First,to confirm the validity of our adopted density functional formalism,we calculate the radial distribution functions using a theoretical approach and compare them with results obtained by molecular dynamics simulation.Then,this approach is applied to two colloids immersed in LJ solvent systems.We investigate the variation of depletion interaction with respect to the distance of two colloids in LJ binary systems.We find that depletion interaction may be attractive or repulsive,mostly depending on the bulk density of the solvent and the temperature of the binary system.For high bulk densities,the repulsive barrier of depletion force is remarkable when the total excluded volume of colloids touches each other and reaches a maximum.The height of the repulsive barrier is related to the parameters of the LJ potential and bulk density.Moreover,the depletion force may exhibit attractive wells if the bulk density of the solvent is low.The attractive well tends to appear when the surface-surface distance of colloids is half of the size of the polymer and deepens with temperature lowering in a fixed bulk density.In contrast with the hard-sphere system,no oscillation of depletion potential around zero is observed.
基金This research was supported by Hankuk University of Foreign Studies Research Fund of 2021.Also,This research was supported by the MIST(Ministry of Science,ICT),Korea,under the National Program for Excellence in SW),supervised by the IITP(Institute of Information&communications Technology Planing&Evaluation)in 2021”(2019-0-01816).
文摘In recent times,internet of things(IoT)applications on the cloud might not be the effective solution for every IoT scenario,particularly for time sensitive applications.A significant alternative to use is edge computing that resolves the problem of requiring high bandwidth by end devices.Edge computing is considered a method of forwarding the processing and communication resources in the cloud towards the edge.One of the considerations of the edge computing environment is resource management that involves resource scheduling,load balancing,task scheduling,and quality of service(QoS)to accomplish improved performance.With this motivation,this paper presents new soft computing based metaheuristic algorithms for resource scheduling(RS)in the edge computing environment.The SCBMARS model involves the hybridization of the Group Teaching Optimization Algorithm(GTOA)with rat swarm optimizer(RSO)algorithm for optimal resource allocation.The goal of the SCBMA-RS model is to identify and allocate resources to every incoming user request in such a way,that the client’s necessities are satisfied with the minimum number of possible resources and optimal energy consumption.The problem is formulated based on the availability of VMs,task characteristics,and queue dynamics.The integration of GTOA and RSO algorithms assist to improve the allocation of resources among VMs in the data center.For experimental validation,a comprehensive set of simulations were performed using the CloudSim tool.The experimental results showcased the superior performance of the SCBMA-RS model interms of different measures.
基金Project supported by the National Natural Science Foundation of China(Nos.12172151 and12172149)the Research Project of Introducing High-level Foreign Experts from the Ministry of Sicence and Technology of China(No.G20221990122)the Start-up Fund from Jinan University(Guangzhou)of China(No.88019062)。
文摘An explicit form of the elastic strain-energy function for direction-dependent large elastic strain behaviors of soft fiber-reinforced composites is first presented based upon a decoupled approach for simulating complex nonlinear coupling effects.From this form,the exact closed-form solutions are then obtained for the uniaxial tension responses in the fiber and cross-fiber directions.With such exact solutions,the issue of simultaneously simulating strongly coupling nonlinear responses in the fiber and cross-fiber directions may be reduced to the issue of separately treating each decoupled uniaxial stress-strain response,thus bypassing usual complexities and uncertainties involved in identifying a large number of strongly coupled adjustable parameters.The numerical examples given are in good agreement with the experimental data for large strain responses.
文摘By studying the relationship between physical structure and function in physical chemistry, the author breaks through the limitation of the western narrow social and cultural structure and function theory, and further derives and founds the Confucian cultural structure and function theory, thus creating a new research methodology and broadening the research horizon. Through the research, it is found that the Confucian culture structure consists of the hard structure ＂ritual＂ and the soft structure ＂benevolence＂, and based on this constructs three-outline, five- principal, four-moral, eight- virtul, five cardinal principals and other Confucian culture, so that these have a social management function, resulting in a 2000-year stable Chinese social order, which also provides reference for the social management of Chinese government today.
文摘Shanghai is located in eastern China and is built on overburden soil layers. It can be seen from the Mexico M S=8.1 earthquake on September 19, 1985 and the Hanshin M S=7.4 earthquake on January 17,1995 that heavy casualties and property losses have a direct relationship with overburden soil layers. Ground motions caused by earthquakes are significantly amplified when passing through the soil layers. Under the influence of these amplified motions, building structures, whose nature frequency is within the frequency band of soil amplification response, will experience more severe damage than those built on bedrock. Therefore, engineering seismologists have paid considerable attention the amplification responses in the Shanghai overburden soil layers. The amplification responses of soil and sand layers in this paper are given by the M L=4.1 earthquake in Nantong, Jiangsu Province on December 25, 2001 at 31.8° N, 120.9° E. It can be seen that the responses of soil and sand layers are very different. That is important.
文摘为解决碳化硅金属氧化物半导体场效应晶体管(SiC Metal Oxide Semiconductor Field Effect Transistor,SiC MOSFET)硬开关故障(Hard Switch Fault,HSF)、负载故障(Fault Under Load,FUL)和过载故障(OverLoad fault,OL)的问题,本文提出了一种基于SiC MOSFET漏极电压和源极电压检测的过流保护方法(OverCurrent Protection method based on the Drain-voltage and Source-voltage Detection,DSD-OCP).该方法通过检测电路实时监控SiC MOSFET的漏极电压和源极电压来准确识别短路故障和过载故障,并利用驱动电路控制SiC MOSFET的开通和关断,从而实现快速短路保护和自适应过载保护,同时还集成软关断功能.基于0.5μm双极型-互补金属氧化物半导体-双扩散金属氧化物半导体(Bipolar-CMOS-DMOS,BCD)工艺,设计了DSD-OCP电路并进行流片,芯片面积为2.8 mm^(2).采用研制的芯片搭建1200 V/80 mΩSiC MOSFET测试平台,并验证了DSD-OCP方法的有效性.实验结果表明,SiC MOSFET在DSD-OCP芯片保护下的HSF和FUL持续时间分别为88 ns和105 ns.在不同母线电压下,DSD-OCP芯片能够为SiC MOSFET提供自适应的过载保护.因DSD-OCP芯片具有软关断功能,SiC MOSFET在过流保护时的漏极电压过冲不超过110 V.
文摘Requirements elicitation step is of paramount importance in the requirements engineering process. In the distributed environment of so-called inter-company cooperative information system, this step is a thorny issue. To elicit require-ments for an inter-company cooperative information system, we early proposed a methodology called MAMIE (from MAcro to MIcro level requirements Elicitation) with an accompanied tool. In MAMIE methodology, requirements are the result of composing functional and non-functional concerns. Before non-functional concerns composition, it’s primary to identify relationships between them. According to the most existing approaches, a non-functional concern may have a negative, positive or null contribution on the other non-functional concerns. In this paper, we argue that using only these three contributions types is not sufficient to express relationships which may exist between non-functional concerns. Thus, we propose a process which aims to identify non-functional concerns’ relationships and model them using a fuzzy cognitive map. The resulting model is composed of non-functional concerns, relationships between them and the weight of these relationships expressed with linguistics fuzzy values. Using fuzzy cognitive maps to model non-functional concerns relationships allows moving from the conventional modelling toward developing a computer based model. An example from the textile industry is used to illustrate the applicability of our process.
文摘目的观察银丹心脑通软胶囊联合静脉溶栓治疗老年急性脑梗死患者的临床疗效及对其神经功能、血液流变学的影响。方法选取2020年2月—2023年2月期间徐州市中心医院(徐州医科大学附属徐州临床学院)神经内科收治的老年急性脑梗死患者100例,采用1∶1匹配病例对照研究方法分为对照组和治疗组,每组各50例。两组患者均予以静脉溶栓治疗,静脉溶栓当天对照组开始应用安慰剂,治疗组联用银丹心脑通软胶囊。治疗3个月后,观察比较两组患者临床疗效、不良反应情况,治疗前后美国国立卫生研究院卒中量表(National institute of health stroke scale,NIHSS)评分、神经功能指标[中枢神经特异蛋白(S100 beta protein,S100β)、神经元特异性烯醇化酶(Neuron-specific enolase,NSE)]、血液流变学指标[全血高切黏度(Whole high viscosity,WHV)、全血低切黏度(Low shear whole blood viscosity,LWV)及血浆黏度(Plasma viscosity,PV)]、脑动脉血流指标[动脉收缩期峰值流速(Peak systolic velocity,PSV)、舒张末期血流速度(End-diastolic velocity,EDV)、平均血流速度(Mean velocity,Vm)]。结果治疗后两组患者NIHSS评分及血清S100β、NSE水平均较治疗前降低,差异有统计学意义(P<0.05);且治疗组NIHSS评分及血清S100β、NSE水平均较对照组明显降低,差异有统计学意义(P<0.05)。治疗后两组患者WHV、LWV及PV指标均较治疗前降低,差异有统计学意义(P<0.05);且治疗组WHV、LWV及PV指标均较对照组明显降低,差异有统计学意义(P<0.05)。治疗后两组患者PSV、EDV及Vm水平均较治疗前升高,差异有统计学意义(P<0.05);且治疗组PSV、EDV及Vm水平均较对照组明显升高,差异有统计学意义(P<0.05)。治疗后治疗组治疗总有效率98.00%(49/50)明显高于对照组78.00%(39/50),差异有统计学意义(P<0.05)。治疗期间,两组患者不良反应发生率比较,差异无统计学意义(P>0.05)。结论银丹心脑通软胶囊联合静脉溶栓治疗老年急性脑梗死患者可明显改善血液高凝状态,增加脑组织血流灌注,改善神经功能,提高治疗效果。
