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Fecal-associated microbiome differences between phlegm-dampness constitution and balanced constitution
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作者 Yini Li Pengfei Zhao +5 位作者 Yunan Zhang Jianhua Zhen Lu Zhao Yanan Cai Qingyi Lu Guangrui Huang 《Journal of Traditional Chinese Medical Sciences》 CAS 2022年第3期257-266,共10页
Objective: This study aimed to explore the structural and functional characteristics of the fecalassociated microbiome(FAM) between the phlegm-dampness constitution(PDC) and balanced constitution(BC), and to screen th... Objective: This study aimed to explore the structural and functional characteristics of the fecalassociated microbiome(FAM) between the phlegm-dampness constitution(PDC) and balanced constitution(BC), and to screen the related specific operational taxonomic unit(OTU) biomarkers.Methods: This was a cross-sectional study. After strictly identifying the constitution of subjects, their clinical index was recorded and counted. Fecal samples were collected for 16S rDNA sequencing. Alpha diversity, beta diversity, and the relative abundance of dominant bacterial taxa were used to describe the FAM structure, and the Wilcoxon rank-sum test, Metagenome Seq, and linear discriminant analysis effect size(LEf Se) were used to screen specific bacterial taxa. Specific OTUs were screened to construct receiver operating characteristic(ROC) curves.Results: Thirty-two subjects were enrolled, including 22 subjects with BC and 10 subjects with PDC.There were significant differences in cold preference, levels of aspartate transaminase, β2-microglobulin,and creatine kinase MB, and alpha diversity indices(Shannon and Shannoneven) between the two groups. In principal coordinate analysis by abund-jaccard distance measure and partial least squares discriminant analysis, bacterial communities clustered separately between the two groups. Furthermore,based on Metagenome Seq, LEf Se, and the Wilcoxon rank-sum test, a total of 43, 18, and 130 OTUs were differentially distributed between BC group and PDC group, respectively, and OTU200, OTU133, and OTU353 were screened when P≤.01. The area under the ROC curve constructed from the 3 selected OTUs was 0.93.Conclusion: The FAM structure and related functional characteristics of the PDC group differed from those of the BC group. In particular, OTU200, OTU133, and OTU353 can be used as unique markers of PDC to assist clinical diagnosis. 展开更多
关键词 Fecal-associated microbiome Traditional Chinese medicine constitution phlegm-dampness constitution Balanced constitution Biomarkers 16S rDNA Metabolic diseases Intestinal flora
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Observation on the Curative Effect of"Hand and Foot 12 Needle Acupuncture"on Stroke in Convalescent Period of Phlegm-Dampness Constitution
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作者 王磊 肖丁 徐寅平 《World Journal of Integrated Traditional and Western Medicine》 2022年第6期11-18,共8页
Objective:To observe the clinical effects of"hand and foot 12 needle acupuncture"on stroke in convalescent period of phlegm-dampness constitution.Methods:The 90 patients were divided into the treatment group... Objective:To observe the clinical effects of"hand and foot 12 needle acupuncture"on stroke in convalescent period of phlegm-dampness constitution.Methods:The 90 patients were divided into the treatment group(n=45)and the control group(n=45)according to the random number table method.The control group received basic Western medicine treatment+rehabilitation treatment of Western medicine,and the treatment group was additively treated with"hand and foot 12 needle acupuncture"on the basis of the control group.NIHSS score,MRS score and Barthel index(BI)before and after treatment were observed in the two groups,and the clinical efficacy of the two groups was compared.Results:The clinical efficacy of stroke patients in the convalescent period of phlegm-dampness constitution after treatment:the total effective rate of the treatment group was 93.33%,and the total effective rate of the control group was 66.67%.After statistical processing,the clinical efficacy of the treatment group was significantly better than the control group;NIHSS score,MRS score and Barthel index(BI)were better than the control group,and the differences were statistically significant(P<0.05).Conclusion:"Hand and foot 12 needle acupuncture"treatment of phlegm-dampness constitution convalescent stroke clinical effect is remarkable. 展开更多
关键词 Acupuncture treatment Filiform needle Hand and foot 12 needle acupuncture phlegm-dampness constitution Convalescent stroke Treatment effect
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Potential mechanism of Huatan Qushi decoction on improving phlegm-dampness constitution using microRNA array and RT-qPCR targeting on hsa-miR-1237e3p 被引量:3
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作者 Xiuping Zhang Ji Wang +5 位作者 Baoxing Liu Haiqiang Yao Yu Chen Yuqing Yin Xuejing Yang Lingru Li 《Journal of Traditional Chinese Medical Sciences》 2021年第1期43-51,共9页
Background:Metabolic diseases pose considerable burden on the healthcare system worldwide,indicating the significance of prevention and treatment.In constitution theory of traditional Chinese medicine,phlegm-dampness ... Background:Metabolic diseases pose considerable burden on the healthcare system worldwide,indicating the significance of prevention and treatment.In constitution theory of traditional Chinese medicine,phlegm-dampness constitution(PDC)is the common basis of metabolic diseases.In clinical practice,Huatan Qushi(HTQS)decoction targeting on PDC can effectively improve metabolic indicators.However,its underlying biochemical mechanism still remains unclear.Methods:Eight PDC participants received HTQS decoction for three months.Their blood was collected at baseline and 1 and 3 months after intervention started.Related biomedical indicators were detected.High-throughput sequencing and RT-qPCR were used for validation.Due to the missing data,repeated measures with missing values in mixed models were used.Results:After 3-month treatment,HDL-C level increased(P<.001)and FBG,FINS,and HbA1c all showed decreasing trend at different time points(all P<.05).After miRNA high-throughput sequencing,compared with the baseline,differential miRNAs at 1 and 3 months were screened,and target gene prediction and KEGG pathway enrichment analysis were performed.The results displayed that metabolic disease-related pathways mainly included pathways in cancer,PI3K-Akt signaling pathway,etc.Further,RT-qPCR showed that hsa-miR-1237e3p differed statistically(P=.008).Then we validated the target genes of hsa-miR-1237e3p in the“Pathways in Cancer”pathway including SDF1,AC,CRK,and HGF,also known as upstream target genes of PI3K/AKT pathway.The results showed that two indicators of CRK and HGF were in statistical significance(P=.045 and P=.036,respectively).Conclusion:PDC serves as a common basis for various metabolic diseases.Through adjusting PDC,HTQS decoction can improve biomedical indicators including blood glucose,HbA1c,insulin,and HDL-C.The target pathway is“Pathways in cancer”.Specifically,HTQS decoction acts on targets of CRK and HGF by regulating hsa-miR-1237e3p,and probably exerts effects on their downstream PI3K/AKT pathway. 展开更多
关键词 Chinese herbal formula constitution Metabolic disorders Pathways in cancer
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Differences in vascular endothelial function and serum proteome between obese people with phlegm-dampness constitution and balanced constitution
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作者 ZHU Linghui SUN Ziwei +5 位作者 GUAN Yuanyuan LIU Meiyi ZHENG Yi YU Ruoxi WANG Qi LI Lingru 《Journal of Traditional Chinese Medicine》 SCIE CSCD 2024年第1期188-196,共9页
OBJECTIVE:To evaluate the extent of vascular endothelial dysfunction and preliminary identify serum protein biomarkers associated with obese individuals at risk for cardiovascular disease(CVD).METHODS:Fifteen obese vo... OBJECTIVE:To evaluate the extent of vascular endothelial dysfunction and preliminary identify serum protein biomarkers associated with obese individuals at risk for cardiovascular disease(CVD).METHODS:Fifteen obese volunteers with the phlegmdampness constitution or balanced constitution were recruited for this study respectively.The clinical baseline data was collected,and the vascular endothelial function was evaluated using the EndoPAT?.Blood samples were collected for the serum proteome analysis.The differences in the serum protein expression levels between the two groups were detected and the protein interaction network analysis,correlation analysis,receiver operating characteristic(ROC)curve analysis,and random forest model investigation were conducted.RESULTS:There were no statistical differences found in the baseline data.For vascular endothelial function,the reactive hyperemia index(RHI)of the phlegm-dampness constitution obese group was significantly lower than that of the balanced constitution obese group(1.46±0.30 vs 2.82±0.78,P<0.0001),indicating vascular endothelial dysfunction.There are 66 differentially expressed serum proteins between the two groups.apolipoprotein A2(Apo A2),angiotensin-converting enzyme 2(ACE-2),interleukin-33(IL-33),and forkhead box P3(FoxP3)showed significant differences and area under curve values of their ROC curves were greater than 0.7 and correlated significantly with RHI.CONCLUSION:Vascular endothelial dysfunction was present in the phlegm-dampness constitution obese group.Thus,alterations in the expression levels of key serum proteins,including Apo A2,ACE-2,IL-33,and Fox P3 could serve as potential biomarkers in the obese population at risk of CVD. 展开更多
关键词 OBESITY phlegm-dampness constitution vascular endothelial function PROTEOME reactive hyperemia index
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Exploration of the Relationship between Phlegm-Dampness Constitution and Polymorphism of Low Density Lipoprotein Receptor Genes Pvu Ⅱand AvaⅡ 被引量:4
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作者 周菁 罗海明 《Chinese Journal of Integrative Medicine》 SCIE CAS 2007年第3期170-174,共5页
Objective: To explore the polymorphism of low density lipoprotein receptor (LDL-R) genes Pvu Ⅱ end Ave Ⅱ in e population with phlegm-dampness constitution (PDC). Methods: Polymorphism of LDL-R genes at Pvu Ⅱ ... Objective: To explore the polymorphism of low density lipoprotein receptor (LDL-R) genes Pvu Ⅱ end Ave Ⅱ in e population with phlegm-dampness constitution (PDC). Methods: Polymorphism of LDL-R genes at Pvu Ⅱ end Ave Ⅱ of 48 persons with gentle constitution (GC) end 61 with PDC were analyzed with PCR-RELP technique, end their serum contents of lipids end glucose were determined end compared as well. Results: The A+ ellelic end P- ellelic frequency were higher end the P+ ellelic frequency was lower in subjects with PDC then those in subjects with GC, which were 0.3083 vs 0.1771, 0.9098 vs 0.7708 end 0.0902 vs 0.2292, respectively, ell showing significant difference between the two groups (P〈0.05). Comparison of the two groups in serum levels of triglyceride (TG), fasting blood glucose, 2 h postprandial blood glucose, end 2 h postprandial insulin showed that ell the parameters were higher in subjects with PDC then in subjects with GC respectively, showing significant difference (P〈0.05). Conclusion: PDC is related with the P- end A+ ellelic frequency of higher LDL-R genes at Pvu Ⅱ end Ave Ⅱ, therefore, the polymorphism of LDL-R genes could be taken as one of the genetic markers for PDC, end humans with PDC ere more liable to suffer from blood lipids end glucose disorder then those with GC. 展开更多
关键词 phlegm-dampness constitution polymorphism of low density lipoprotein receptor gene
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Optimal exercise intensity and volume to impact rats with Traditional Chinese Medicine phlegm-dampness constitution 被引量:1
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作者 Zhangmeng Xu Yong Chen +5 位作者 Duoduo Yu Donghong Feng Chenjian Tang Tao Li Jing Zhou Yaming Yu 《Sports Medicine and Health Science》 2021年第1期28-33,共6页
Objective:We aim to investigate the effects of different exercise intensities and volumes on Phlegm-dampness constitution(PDC).Methods:The rats were fed with high-fat food and lived in 75%–85%humidity for 6 weeks to ... Objective:We aim to investigate the effects of different exercise intensities and volumes on Phlegm-dampness constitution(PDC).Methods:The rats were fed with high-fat food and lived in 75%–85%humidity for 6 weeks to establish the model of PDC.Then PDC rats were screened and intervened by varying exercise intensities for 8 weeks.Weight,constitution scores,blood and liver tissues were collected to detect the concentration of serum total cholesterol(Tch),triglyceride(TG),low-density lipoprotein cholesterol(LDL-C),high-density lipoprotein cholesterol(HDL-C),homocysteine(Hcy),blood glucose(GLU),alanine transaminase(ALT)and percentage of lipid droplet area in liver tissue(PLDA).Results:The weight,Tch,TG,HDL-C,LDL-C,Hcy,GLU,and ALT of rats in moderate-intensity exercise group returned to normal.The rats with high-intensity or low-intensity exercise did not recover as well as moderate-intensity.Conclusion:Different exercise intensities and volumes have different effects on PDC,moderate-intensity exercise over an 8-week intervention is most appropriate. 展开更多
关键词 constitution of traditional Chinese medicine Aerobic exercise Exercise intensity and volume phlegm-dampness constitution
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Constitutional Nature of Personality Rights and Its Manifestation in Civil Law
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作者 陈斯彬 《The Journal of Human Rights》 2023年第4期804-825,共22页
The formation of personality comes from people’s choices and pursuit of self-realization,which is influenced by objective factors but not determined by them,so personality does not belong to the domain of objectivity... The formation of personality comes from people’s choices and pursuit of self-realization,which is influenced by objective factors but not determined by them,so personality does not belong to the domain of objectivity.The concept of general personality rights in the German Constitution was initially premised on the objective determinability in the field of personality,but in constitutional jurisprudence,it gradually shifted to something with individual autonomy as the core and personal self-realization as the goal,and the scope of relevant rights expanded accordingly,so that they could not be clearly distinguished from general freedom of action and thus became the general principle of constitutional rights.The protection of constitutional personality rights in the United States and Japan can also confirm this process,providing evidence for the constitutional nature of personality rights.Deeper research shows that constitutional personality rights actually manifest the highest value of modern constitutions—human dignity.In contrast,the theoretical justification of personality rights in civil law just lies in the objectivity and defensive nature of personality elements. 展开更多
关键词 general personality rights constitutional personality rights SELF-REALIZATION SELF-DETERMINATION human dignity
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Development and Application of a Power Law Constitutive Model for Eddy Current Dampers
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作者 Longteng Liang Zhouquan Feng +2 位作者 Hongyi Zhang Zhengqing Chen Changzhao Qian 《Computer Modeling in Engineering & Sciences》 SCIE EI 2024年第3期2403-2419,共17页
Eddy current dampers (ECDs) have emerged as highly desirable solutions for vibration control due to theirexceptional damping performance and durability. However, the existing constitutive models present challenges tot... Eddy current dampers (ECDs) have emerged as highly desirable solutions for vibration control due to theirexceptional damping performance and durability. However, the existing constitutive models present challenges tothe widespread implementation of ECD technology, and there is limited availability of finite element analysis (FEA)software capable of accurately modeling the behavior of ECDs. This study addresses these issues by developing anewconstitutivemodel that is both easily understandable and user-friendly for FEAsoftware. By utilizing numericalresults obtained from electromagnetic FEA, a novel power law constitutive model is proposed to capture thenonlinear behavior of ECDs. The effectiveness of the power law constitutive model is validated throughmechanicalproperty tests and numerical seismic analysis. Furthermore, a detailed description of the application process ofthe power law constitutive model in ANSYS FEA software is provided. To facilitate the preliminary design ofECDs, an analytical derivation of energy dissipation and parameter optimization for ECDs under harmonicmotionis performed. The results demonstrate that the power law constitutive model serves as a viable alternative forconducting dynamic analysis using FEA and optimizing parameters for ECDs. 展开更多
关键词 Eddy current damper constitutive model finite element analysis vibration control power law constitutive model
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Why The Constitution Should Protect Personal Credit Information?——An Approach of Right Argumentation
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作者 李艺 SU Yilon 《The Journal of Human Rights》 2023年第2期328-346,共19页
Protecting personal credit information through constitutional rights is not only essemtial for individuals to defend against infringements on their personal credit information rights and interests by public power in t... Protecting personal credit information through constitutional rights is not only essemtial for individuals to defend against infringements on their personal credit information rights and interests by public power in the social credit system,but also a requirement for unified legislation on social credit to explore the basis for constitutional norms.In the era of the credit economy,personal credit information has become a vital resource for realizing personal autonomy.Along with the increase in the state’s supervision and control of personal credit,the realization of the autonomous value in the interests related to personal credit information has also set more obligations for the state.Therefore,interests related to personal credit information should be regarded as a constitutional right.Because of its significant economic interest and value,the right to personal credit information should be classified as a constitutional property right.As a constitutional property right,the right to personal credit information can not only help protect people’s economic interests,but also achieve the goal of safeguarding their personality interests. 展开更多
关键词 right to personal credit information constitutional rights social and economic rights property rights
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Comparative Study on Traditional Chinese and Western Medicine Through the Perspective of Constitution Theory in Huangdi Neijing and Hippocrates Corpus
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作者 曾幸 张春月 +1 位作者 李文骄 邹建华 《World Journal of Integrated Traditional and Western Medicine》 2023年第3期52-59,共8页
This article compares the constitution theory of Huangdi Neijing 《黄帝内经》 and Hippocrates Corpus 《希波克拉底文集》 from three aspects:theory,philosophical ideas,and influence on later generations,to analyze the s... This article compares the constitution theory of Huangdi Neijing 《黄帝内经》 and Hippocrates Corpus 《希波克拉底文集》 from three aspects:theory,philosophical ideas,and influence on later generations,to analyze the similarities and differences between two medical systems representing TCM and Western medicine in their early stages of origin.From the comparison and analysis of two books’ history,specific theories in constitution,philosophical characteristics and values in history,we can have a deeper perspective to compare TCM and Western medicine,and have a clearer idea for the development of integrated traditional Chinese and Western medicine. 展开更多
关键词 HuangdiNeijing HippocratesCorpus constitution theory
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An improved strain-softening constitutive model of granite considering the effect of crack deformation
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作者 Yapeng Li Qiang Zhang +2 位作者 Qiuxin Gu Peinan Wu Binsong Jiang 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2024年第4期1202-1215,共14页
This paper presents an improved strain-softening constitutive model considering the effect of crack deformation based on the triaxial cyclic loading and unloading test results.The improved model assumes that total str... This paper presents an improved strain-softening constitutive model considering the effect of crack deformation based on the triaxial cyclic loading and unloading test results.The improved model assumes that total strain is a combination of plastic,elastic,and crack strains.The constitutive relationship between the crack strain and the stress was further derived.The evolutions of mechanical parameters,i.e.strength parameters,dilation angle,unloading elastic modulus,and deformation parameters of crack,with the plastic strain and confining pressure were studied.With the increase in plastic strain,the cohesion,friction angle,dilation angle,and crack Poisson's ratio initially increase and subsequently decrease,and the unloading elastic modulus and the crack elastic modulus nonlinearly decrease.The increasing confining pressure enhances the strength and unloading elastic modulus,and decreases the dilation angle and Poisson's ratio of the crack.The theoretical triaxial compressive stress-strain curves were compared with the experimental results,and they present a good agreement with each other.The improved constitutive model can well reflect the nonlinear mechanical behavior of granite. 展开更多
关键词 STRAIN-SOFTENING Crack deformation effect Plastic shear strain constitutive model
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The Concept of Human Rights in the Constitution and Its Functional Significance
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作者 严海良 CHEN Feng 《The Journal of Human Rights》 2023年第1期56-90,共35页
To practice the constitutional provision that “The state respects and protects human rights”, we should clarify its connotation. The understanding of human rights is a natural requirement and the key. In domestic ac... To practice the constitutional provision that “The state respects and protects human rights”, we should clarify its connotation. The understanding of human rights is a natural requirement and the key. In domestic academia, human rights are considered natural rights and interpreted as “moral rights that everyone should enjoy as a human being”, hoping to provide theoretical support for the development of the system centered on the basic rights of citizens in China.Although it reveals the universal moral connotation of human rights, it does not cover the normative connotation of human rights as common international standards. Therefore, it is impossible to fully clarify the functional significance of the provision. It is conducive to scientifically clarifying the relationship between human rights and basic civil rights,better improving the institutional protection of human rights in China,and promoting the building of a community with a shared future for mankind to interpret human rights as common international standards that everyone should enjoy for human dignity based on the development of the international legal order under the Charter of the United Nations since the end of the World War Ⅱ. 展开更多
关键词 human rights constitutional rights international law common standards
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Fatigue properties and damage constitutive model of salt rock based on CT scanning
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作者 Junbao Wang Xiao Liu +3 位作者 Qiang Zhang Xinrong Liu Zhanping Song Shijin Feng 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2024年第2期245-259,共15页
To investigate the macroscopic fatigue properties and the mesoscopic pore evolution characteristics of salt rock under cyclic loading,fatigue tests under different upper-limit stresses were carried out on salt rock,an... To investigate the macroscopic fatigue properties and the mesoscopic pore evolution characteristics of salt rock under cyclic loading,fatigue tests under different upper-limit stresses were carried out on salt rock,and the mesoscopic pore structures of salt rock before and after fatigue tests and under different cycle numbers were measured using CT scanning instrument.Based on the test results,the effects of the cycle number and the upper-limit stress on the evolution of cracks,pore morphology,pore number,pore volume,pore size,plane porosity,and volume porosity of salt rock were analyzed.The failure path of salt rock specimens under cyclic loading was analyzed using the distribution law of plane porosity.The damage variable of salt rock under cyclic loading was defined on basis of the variation of volume porosity with cycle number.In order to describe the fatigue deformation behavior of salt rock under cyclic loading,the nonlinear Burgers damage constitutive model was further established.The results show that the model established can better reflect the whole development process of fatigue deformation of salt rock under cyclic loading. 展开更多
关键词 Salt rock Cyclic loading CT scanning Mesoscopic pore evolution constitutive model
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Nonlinear constitutive models of rock structural plane and their applications
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作者 Wenlin Feng Shuangjian Niu +1 位作者 Chunsheng Qiao Dujian Zou 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2024年第3期790-806,共17页
Structural planes play an important role in controlling the stability of rock engineering,and the influence of structural planes should be considered in the design and construction process of rock engineering.In this ... Structural planes play an important role in controlling the stability of rock engineering,and the influence of structural planes should be considered in the design and construction process of rock engineering.In this paper,mechanical properties,constitutive theory,and numerical application of structural plane are studied by a combination method of laboratory tests,theoretical derivation,and program development.The test results reveal the change laws of various mechanical parameters under different roughness and normal stress.At the pre-peak stage,a non-stationary model of shear stiffness is established,and threedimensional empirical prediction models for initial shear stiffness and residual stage roughness are proposed.The nonlinear constitutive models are established based on elasto-plastic mechanics,and the algorithms of the models are developed based on the return mapping algorithm.According to a large number of statistical analysis results,empirical prediction models are proposed for model parameters expressed by structural plane characteristic parameters.Finally,the discrete element method(DEM)is chosen to embed the constitutive models for practical application.The running programs of the constitutive models have been compiled into the discrete element model library.The comparison results between the proposed model and the Mohr-Coulomb slip model show that the proposed model can better describe nonlinear changes at different stages,and the predicted shear strength,peak strain and shear stiffness are closer to the test results.The research results of the paper are conducive to the accurate evaluation of structural plane in rock engineering. 展开更多
关键词 Structural plane Engineering stability ROUGHNESS Normal stress Elasto-plastic constitutive model Discrete element method
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Time-domain dynamic constitutive model suitable for mucky soil site seismic response
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作者 Dong Qing Chen Su +2 位作者 Jin Liguo Zhou Zhenghua Li Xiaojun 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2024年第1期1-13,共13页
Soil nonlinear behavior displays noticeable effects on the site seismic response.This study proposes a new functional expression of the skeleton curve to replace the hyperbolic skeleton curve.By integrating shear modu... Soil nonlinear behavior displays noticeable effects on the site seismic response.This study proposes a new functional expression of the skeleton curve to replace the hyperbolic skeleton curve.By integrating shear modulus and combining the dynamic skeleton curve and the damping degradation coefficient,the constitutive equation of the logarithmic dynamic skeleton can be obtained,which considers the damping effect in a soil dynamics problem.Based on the finite difference method and the multi-transmitting boundary condition,a 1D site seismic response analysis program called Soilresp1D has been developed herein and used to analyze the time-domain seismic response in three types of sites.At the same time,this study also provides numerical simulation results based on the hyperbolic constitutive model and the equivalent linear method.The results verify the rationality of the new soil dynamic constitutive model.It can analyze the mucky soil site nonlinear seismic response,reflecting the deformation characteristics and damping effect of the silty soil.The hysteresis loop area is more extensive,and the residual strain is evident. 展开更多
关键词 seismic response time-domain dynamic constitutive model logarithmic dynamic skeleton dampening effect mucky soil
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A thermodynamics-based three-scale constitutive model for partially saturated granular materials
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作者 Jianqiu Tian Enlong Liu Yuancheng Guo 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2024年第5期1813-1831,共19页
A three-scale constitutive model for unsaturated granular materials based on thermodynamic theory is presented.The three-scale yield locus,derived from the explicit yield criterion for solid matrix,is developed from a... A three-scale constitutive model for unsaturated granular materials based on thermodynamic theory is presented.The three-scale yield locus,derived from the explicit yield criterion for solid matrix,is developed from a series of discrete interparticle contact planes.The three-scale yield locus is sensitive to porosity changes;therefore,it is reinterpreted as a corresponding constitutive model without phenomenological parameters.Furthermore,a water retention curve is proposed based on special pore morphology and experimental observations.The features of the partially saturated granular materials are well captured by the model.Under wetting and isotropic compression,volumetric compaction occurs,and the degree of saturation increases.Moreover,the higher the matric suction,the greater the strength,and the smaller the volumetric compaction.Compared with the phenomenological Barcelona basic model,the proposed three-scale constitutive model has fewer parameters;virtually all parameters have clear physical meanings. 展开更多
关键词 Unsaturated granular material Unsaturated porous material GEOMATERIALS Multi-scale constitutive model Water retention curve PLASTICITY
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Parameter calibration of the tensile-shear interactive damage constitutive model for sandstone failure
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作者 Yun Shu Zheming Zhu +4 位作者 Meng Wang Weiting Gao Fei Wang Duanying Wan Yuntao Wang 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2024年第4期1153-1174,共22页
The tensile-shear interactive damage(TSID)model is a novel and powerful constitutive model for rock-like materials.This study proposes a methodology to calibrate the TSID model parameters to simulate sandstone.The bas... The tensile-shear interactive damage(TSID)model is a novel and powerful constitutive model for rock-like materials.This study proposes a methodology to calibrate the TSID model parameters to simulate sandstone.The basic parameters of sandstone are determined through a series of static and dynamic tests,including uniaxial compression,Brazilian disc,triaxial compression under varying confining pressures,hydrostatic compression,and dynamic compression and tensile tests with a split Hopkinson pressure bar.Based on the sandstone test results from this study and previous research,a step-by-step procedure for parameter calibration is outlined,which accounts for the categories of the strength surface,equation of state(EOS),strain rate effect,and damage.The calibrated parameters are verified through numerical tests that correspond to the experimental loading conditions.Consistency between numerical results and experimental data indicates the precision and reliability of the calibrated parameters.The methodology presented in this study is scientifically sound,straightforward,and essential for improving the TSID model.Furthermore,it has the potential to contribute to other rock constitutive models,particularly new user-defined models. 展开更多
关键词 Damage constitutive model Parameter calibration Rock modeling SANDSTONE Dynamic impact load Tensile-shear interactive damage(TSID)model
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Damage constitutive model of lunar soil simulant geopolymer under impact loading
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作者 Hanyan Wang Qinyong Ma Qianyun Wu 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2024年第3期1059-1071,共13页
Lunar base construction is a crucial component of the lunar exploration program,and considering the dynamic characteristics of lunar soil is important for moon construction.Therefore,investigating the dynamic properti... Lunar base construction is a crucial component of the lunar exploration program,and considering the dynamic characteristics of lunar soil is important for moon construction.Therefore,investigating the dynamic properties of lunar soil by establishing a constitutive relationship is critical for providing a theoretical basis for its damage evolution.In this paper,a split Hopkinson pressure bar(SHPB)device was used to perform three sets of impact tests under different pressures on a lunar soil simulant geopolymer(LSSG)with sodium silicate(Na_(2)SiO_(3))contents of 1%,3%,5%and 7%.The dynamic stressestrain curves,failure modes,and energy variation rules of LSSG under different pressures were obtained.The equation was modified based on the ZWT viscoelastic constitutive model and was combined with the damage variable.The damage element obeys the Weibull distribution and the constitutive equation that can describe the mechanical properties of LSSG under dynamic loading was obtained.The results demonstrate that the dynamic compressive strength of LSSG has a marked strain-rate strengthening effect.Na_(2)SiO_(3) has both strengthening and deterioration effects on the dynamic compressive strength of LSSG.As Na_(2)SiO_(3) grows,the dynamic compressive strength of LSSG first increases and then decreases.At a fixed air pressure,5%Na_(2)SiO_(3) had the largest dynamic compressive strength,the largest incident energy,the smallest absorbed energy,and the lightest damage.The ZWT equation was modified according to the stress response properties of LSSG and the range of the SHPB strain rate to obtain the constitutive equation of the LSSG,and the model’s correctness was confirmed. 展开更多
关键词 Lunar soil simulant geopolymer(LSSG) Split hopkinson pressure bar(SHPB)test constitutive model Energy analysis Failure mode
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从设议院到立宪法——晚清“Constitution”汉译与立宪思潮形成考论 被引量:4
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作者 饶传平 《现代法学》 CSSCI 北大核心 2011年第5期24-36,共13页
在中国,英文"Constitution"一词早期曾被译为"国例"、"例制"、"国法"、"章程"、"国律"等中文词。中国近代立宪意义上的"宪法"一词,最早见于王韬和郑观应的著作... 在中国,英文"Constitution"一词早期曾被译为"国例"、"例制"、"国法"、"章程"、"国律"等中文词。中国近代立宪意义上的"宪法"一词,最早见于王韬和郑观应的著作,但他们只是一提而过,并未作深入的阐述。维新期间的康有为、梁启超也多次提到"宪法"一词,但他们只是把宪法当作一般的律法看待,并无立宪涵义的认知,更谈不上提出了立宪的主张。学界长期使用的史料、康有为《请定立宪开国会折》中"立宪法"、"三权鼎立"的内容是后来改窜添加的。戊戌时期康、梁的政治主张主要集中在兴民权、设议院上,并非如学界长期认为的那样,已经成为了立宪主义者。康、梁真正成为立宪主义者,要在逃亡日本、大量阅读日译或日著的宪法著作之后。在日本,"Constitution"早期也被译为"国宪"、"政体"等词。日本近代立宪主义上的"宪法"一词,最早出现在明治初年对西方宪法的翻译中,后经立宪进程的推展而成为公定用语。中国近代对宪法概念首次展开深入分析的,是流亡日本后的梁启超于1899年撰写的《各国宪法异同论》一文。英文"Constitution"和具有立宪主义涵义之"宪法"概念,正是经"同文同种"之日本学者的翻译、梁启超以及留日学生的转述而在中国真正广泛传播开来。随着日俄战争中日本取胜,"立宪救国论"随之而起,中国立宪的进程才真正得以开启。 展开更多
关键词 constitution 宪法 议院 立宪主义
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宪法上的Civil Rights是公民权利吗?——解读constitutional civil right 被引量:9
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作者 郑贤君 《首都师范大学学报(社会科学版)》 2004年第4期47-56,共10页
作为西方法律文化的产物 ,constitutionalcivilrights有其独特的自然法背景。本文通过对西方法律思想史、宪法史和美国最高法院司法实务见解的梳理与综合分析 ,认为将constitutionalcivilrights译为“公民权利”属于误读 ,它混淆了依据... 作为西方法律文化的产物 ,constitutionalcivilrights有其独特的自然法背景。本文通过对西方法律思想史、宪法史和美国最高法院司法实务见解的梳理与综合分析 ,认为将constitutionalcivilrights译为“公民权利”属于误读 ,它混淆了依据人的属性和依据公民资格而获得的权利之间的道德区别。应将其译为“私人权利” ,明确这一权利体系的前国家与超国家特征 ,使其区别于实证法律传统之下个人依赖作为政治社会成员资格所享有的公民权利 ,并区分宪法权利与民事权利之间的差异。在法官的解释下 ,constitutionalcivilrights还呈现出开放特性 ,是一个能够感应时代变化的、发展的权利体系。 展开更多
关键词 constitutionAL Civil RIGHTS 自然权利 个人权利 私人权利 宪法权利
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