Legal English isvery important for the study and the usage of law , combing personal study and usage of law, I summa-rize the teaching method of legal English to help those who want to study and use Legal English to m...Legal English isvery important for the study and the usage of law , combing personal study and usage of law, I summa-rize the teaching method of legal English to help those who want to study and use Legal English to make some progress.展开更多
Legal research methods refer to a general term for disciplined and systematic procedures, approaches, means, techniques, and models used by researchers to acquire novel and reliable legal knowledge. Several theoretica...Legal research methods refer to a general term for disciplined and systematic procedures, approaches, means, techniques, and models used by researchers to acquire novel and reliable legal knowledge. Several theoretical debates on the originality of legal research methods go on as follows: Is one legal research method superior to another? Do legal research methods aim for methodological independence? Are legal research methods objective or subjective? Influenced by scientism, positivism is usually considered to be the only reasonable research method, but since law is different from science, only using positivist research approaches is insufficient for solving legal problems. Strictly speaking, a method that is appropriate for the research subject is a reasonable method. As one of the humanities and social sciences, law has similarities with other disciplines in terms of the scope of research;therefore, its research methods could be borrowed from other disciplines. However, law cannot ignore the development of its own unique research methods while retaining its advantages. Legal research methods are supposed to be objective because they should follow scientific standards and have objective arguments, but inevitably, legal research would be subjective and full of value judgments since it means subjective and creative activities of researchers. Of course, the choice of values should preferably be made in the context of value-freeness to ensure the organic combination of value-freeness and value judgment.展开更多
The recirculating planetary roller screw mechanism(RPRSM)is a transmission mechanism that engages the screw and nut threaded by multiple grooved rollers.In this paper,frstly,the design method of RPRSM nut threadless a...The recirculating planetary roller screw mechanism(RPRSM)is a transmission mechanism that engages the screw and nut threaded by multiple grooved rollers.In this paper,frstly,the design method of RPRSM nut threadless area is proposed,and the equations related to the structural parameters of nut threadless area are derived.On this basis,the cross-section design method of roller,screw and nut is constructed according to the actual situation of engagements between the screw/nut and the roller.By adjusting the gap between the two beveled edges and that between the arc and the beveled edge,the accuracy of the thread engagements between the screw/nut and the roller can be improved.Secondly,to ensure the engagements of the screw/nut and the roller,the distance equation from the center surface of the diferent rollers to the end surface of cam ring is given.Thirdly,combined with the working principle and structural composition of RPRSM,the component model is established according to its relevant structural parameters,and the virtual assembly is completed.Finally,the 3D model is imported into the ADAMS simulation software for multi-rigid body dynamics.The dynamic characteristic is analyzed,and the simulated values are compared with the theoretical values.The results show that the contact forces between the screw/nut and the roller are sinusoidal,mainly due to the existence of a small gap between the roller and the carrier.The maximum collision forces between the roller and cam ring are independent from load magnitude.Normally,the collision force between the roller and the carrier increases as the load increases.When RPRSM is in the transmission process,the roller angular speed in nut threadless area begins to appear abruptly,and the position of the maximum change is at the contact between the roller and the convex platform of cam ring.The design of the nut threadless area and the proposed virtual assembly method can provide a theoretical guidance for RPRSM research,as well as a reference for overall performance optimization.展开更多
The rock uniaxial compressive strength(UCS)is the basic parameter for support designs in underground engineering.In particular,the rock UCS should be obtained rapidly for underground engineering with complex geologica...The rock uniaxial compressive strength(UCS)is the basic parameter for support designs in underground engineering.In particular,the rock UCS should be obtained rapidly for underground engineering with complex geological conditions,such as soft rock,fracture areas,and high stress,to adjust the excavation and support plan and ensure construction safety.To solve the problem of obtaining real-time rock UCS at engineering sites,a rock UCS forecast idea is proposed using digital core drilling.The digital core drilling tests and uniaxial compression tests are performed based on the developed rock mass digital drilling system.The results indicate that the drilling parameters are highly responsive to the rock UCS.Based on the cutting and fracture characteristics of the rock digital core drilling,the mechanical analysis of rock cutting provides the digital core drilling strength,and a quantitative relationship model(CDP-UCS model)for the digital core drilling parameters and rock UCS is established.Thus,the digital core drilling-based rock UCS forecast method is proposed to provide a theoretical basis for continuous and quick testing of the surrounding rock UCS.展开更多
背景:膝骨关节炎是一种常见的关节软骨及周围组织损伤的慢性炎症性疾病,而免疫细胞在膝骨关节炎免疫炎症反应中起到重要作用,但其中的具体机制仍有待深入研究。目的:采用孟德尔随机化方法来评估731种免疫细胞表型与膝骨关节炎风险之间...背景:膝骨关节炎是一种常见的关节软骨及周围组织损伤的慢性炎症性疾病,而免疫细胞在膝骨关节炎免疫炎症反应中起到重要作用,但其中的具体机制仍有待深入研究。目的:采用孟德尔随机化方法来评估731种免疫细胞表型与膝骨关节炎风险之间的潜在因果关系。方法:使用全基因组关联分析(GWAS)目录中公开获取731种免疫细胞表型的全基因组关联分析统计数据(从GCST0001391到GCST0002121)和IEUGWAS数据库中膝骨关节炎的全基因组关联分析数据(ebi-a-GCST007090)。采用逆方差加权法、MR-Egger回归法、加权中位数法、加权模型法和简单模型法来研究免疫细胞与膝骨关节炎之间的因果关系。敏感性分析用于检验孟德尔随机化分析结果是否可靠,然后以同样方法进行反向孟德尔随机化分析。结果与结论:①正向分析结果表明,共有4种免疫细胞表型与膝骨关节炎有显著的因果关系(FDR<0.20),其中B细胞中的CD27 on CD24+CD27+(OR=1.026,P=0.00026,Pfdr=0.18)、髓系细胞中的CD33 on CD33dim HLA DR-(OR=1.014,P=0.00050,Pfdr=0.18)以及Treg细胞中的CD45RA+CD28-CD8br%CD8br(OR=1.001,P=0.00078,Pfdr=0.18)与膝骨关节炎风险呈直接的正向因果关联;单核细胞中PDL-1 on monocyte(OR=0.952,P=0.00098,Pfdr=0.18)与膝骨关节炎风险呈直接的负向因果关联。②反向分析结果表明,当膝骨关节炎作为暴露数据时,与731种免疫细胞表型均不具有显著因果关系(FDR<0.20)。③敏感性分析结果显示:双向孟德尔随机化的Cochran’s Q检验和MR-Egger回归法结果P值均大于0.05,表明免疫细胞表型与膝骨关节炎之间的因果效应分析不存在显著的异质性和多效性。④上述结果证实,CD27 on CD24+CD27+,CD33 on CD33dim HLA DR-,CD45RA+CD28-CD8br%CD8br以及PDL-1 on monocyte免疫细胞表型与膝骨关节炎之间可能具有较为显著的潜在因果关系,这为研究膝骨关节炎的生物学机制及探索膝骨关节炎的早期防治提供有价值的线索,也为干预性药物的开发提供了新的方向。展开更多
锂离子电池储能电站火灾事故频繁发生且损失严重,对锂离子电池储能电站火灾风险开展研究可有效预防火灾的发生。首先根据物理-事理-人理(WSR)理论,构建锂电池特性、消防设施、安全管理和人员因素4个一级指标、12个二级指标和32个三级指...锂离子电池储能电站火灾事故频繁发生且损失严重,对锂离子电池储能电站火灾风险开展研究可有效预防火灾的发生。首先根据物理-事理-人理(WSR)理论,构建锂电池特性、消防设施、安全管理和人员因素4个一级指标、12个二级指标和32个三级指标的锂离子电池储能电站火灾风险评价指标体系;然后运用序关系分析(G1)法确定各评价指标的主观权重,采用CRITIC法(Criteria Importance Though Intercriteria Correlation,CRITIC)确定客观权重,基于拉格朗日乘法优化后的最小信息熵原理确定组合权重,并结合云模型理论建立锂离子电池储能电站火灾风险评价模型。以某磷酸铁锂储能电站为例开展火灾风险等级评价,结果表明:储能电站火灾风险综合云特征值为(71.3104,1.2142,0.2568),火灾风险等级处于“中风险”,在运行环境和防火设计等方面存在较严重的问题并亟需改进。评价结果与实际火灾风险等级相符,实例证明锂离子电池储能电站火灾风险评价模型能够较准确地反映储能电站火灾风险情况,为锂离子电池储能电站火灾预防与风险管控提供参考。展开更多
文摘Legal English isvery important for the study and the usage of law , combing personal study and usage of law, I summa-rize the teaching method of legal English to help those who want to study and use Legal English to make some progress.
基金supported by the Major Program of the National Social Science Foundation,"Research on Improving the System of Rule-of-Law Guarantee for Social Fairness and Justice"(No.20AZD028).
文摘Legal research methods refer to a general term for disciplined and systematic procedures, approaches, means, techniques, and models used by researchers to acquire novel and reliable legal knowledge. Several theoretical debates on the originality of legal research methods go on as follows: Is one legal research method superior to another? Do legal research methods aim for methodological independence? Are legal research methods objective or subjective? Influenced by scientism, positivism is usually considered to be the only reasonable research method, but since law is different from science, only using positivist research approaches is insufficient for solving legal problems. Strictly speaking, a method that is appropriate for the research subject is a reasonable method. As one of the humanities and social sciences, law has similarities with other disciplines in terms of the scope of research;therefore, its research methods could be borrowed from other disciplines. However, law cannot ignore the development of its own unique research methods while retaining its advantages. Legal research methods are supposed to be objective because they should follow scientific standards and have objective arguments, but inevitably, legal research would be subjective and full of value judgments since it means subjective and creative activities of researchers. Of course, the choice of values should preferably be made in the context of value-freeness to ensure the organic combination of value-freeness and value judgment.
基金Supported by National Natural Science Foundation of China(Grant Nos.52065053,51875458)Natural Science Foundation of Inner Mongolia(Grant No.2020BS05003)Inner Mongolia Science and Technology Project(Grant No.2020GG0288).
文摘The recirculating planetary roller screw mechanism(RPRSM)is a transmission mechanism that engages the screw and nut threaded by multiple grooved rollers.In this paper,frstly,the design method of RPRSM nut threadless area is proposed,and the equations related to the structural parameters of nut threadless area are derived.On this basis,the cross-section design method of roller,screw and nut is constructed according to the actual situation of engagements between the screw/nut and the roller.By adjusting the gap between the two beveled edges and that between the arc and the beveled edge,the accuracy of the thread engagements between the screw/nut and the roller can be improved.Secondly,to ensure the engagements of the screw/nut and the roller,the distance equation from the center surface of the diferent rollers to the end surface of cam ring is given.Thirdly,combined with the working principle and structural composition of RPRSM,the component model is established according to its relevant structural parameters,and the virtual assembly is completed.Finally,the 3D model is imported into the ADAMS simulation software for multi-rigid body dynamics.The dynamic characteristic is analyzed,and the simulated values are compared with the theoretical values.The results show that the contact forces between the screw/nut and the roller are sinusoidal,mainly due to the existence of a small gap between the roller and the carrier.The maximum collision forces between the roller and cam ring are independent from load magnitude.Normally,the collision force between the roller and the carrier increases as the load increases.When RPRSM is in the transmission process,the roller angular speed in nut threadless area begins to appear abruptly,and the position of the maximum change is at the contact between the roller and the convex platform of cam ring.The design of the nut threadless area and the proposed virtual assembly method can provide a theoretical guidance for RPRSM research,as well as a reference for overall performance optimization.
基金the Natural Science Foundation of China(Nos.51874188,51927807,41941018 and 51704125)the State Key Laboratory for GeoMechanics and Deep Underground Engineering,China University of Mining&Technology(No.SKLGDUEK1717)+1 种基金the Major Scientific and Technological Innovation Project of Shandong Province,China(No.2019SDZY04)the Project of Shandong Province Higher Educational Youth Innovation Science and Technology Program(No.2019KJG013).
文摘The rock uniaxial compressive strength(UCS)is the basic parameter for support designs in underground engineering.In particular,the rock UCS should be obtained rapidly for underground engineering with complex geological conditions,such as soft rock,fracture areas,and high stress,to adjust the excavation and support plan and ensure construction safety.To solve the problem of obtaining real-time rock UCS at engineering sites,a rock UCS forecast idea is proposed using digital core drilling.The digital core drilling tests and uniaxial compression tests are performed based on the developed rock mass digital drilling system.The results indicate that the drilling parameters are highly responsive to the rock UCS.Based on the cutting and fracture characteristics of the rock digital core drilling,the mechanical analysis of rock cutting provides the digital core drilling strength,and a quantitative relationship model(CDP-UCS model)for the digital core drilling parameters and rock UCS is established.Thus,the digital core drilling-based rock UCS forecast method is proposed to provide a theoretical basis for continuous and quick testing of the surrounding rock UCS.
文摘背景:膝骨关节炎是一种常见的关节软骨及周围组织损伤的慢性炎症性疾病,而免疫细胞在膝骨关节炎免疫炎症反应中起到重要作用,但其中的具体机制仍有待深入研究。目的:采用孟德尔随机化方法来评估731种免疫细胞表型与膝骨关节炎风险之间的潜在因果关系。方法:使用全基因组关联分析(GWAS)目录中公开获取731种免疫细胞表型的全基因组关联分析统计数据(从GCST0001391到GCST0002121)和IEUGWAS数据库中膝骨关节炎的全基因组关联分析数据(ebi-a-GCST007090)。采用逆方差加权法、MR-Egger回归法、加权中位数法、加权模型法和简单模型法来研究免疫细胞与膝骨关节炎之间的因果关系。敏感性分析用于检验孟德尔随机化分析结果是否可靠,然后以同样方法进行反向孟德尔随机化分析。结果与结论:①正向分析结果表明,共有4种免疫细胞表型与膝骨关节炎有显著的因果关系(FDR<0.20),其中B细胞中的CD27 on CD24+CD27+(OR=1.026,P=0.00026,Pfdr=0.18)、髓系细胞中的CD33 on CD33dim HLA DR-(OR=1.014,P=0.00050,Pfdr=0.18)以及Treg细胞中的CD45RA+CD28-CD8br%CD8br(OR=1.001,P=0.00078,Pfdr=0.18)与膝骨关节炎风险呈直接的正向因果关联;单核细胞中PDL-1 on monocyte(OR=0.952,P=0.00098,Pfdr=0.18)与膝骨关节炎风险呈直接的负向因果关联。②反向分析结果表明,当膝骨关节炎作为暴露数据时,与731种免疫细胞表型均不具有显著因果关系(FDR<0.20)。③敏感性分析结果显示:双向孟德尔随机化的Cochran’s Q检验和MR-Egger回归法结果P值均大于0.05,表明免疫细胞表型与膝骨关节炎之间的因果效应分析不存在显著的异质性和多效性。④上述结果证实,CD27 on CD24+CD27+,CD33 on CD33dim HLA DR-,CD45RA+CD28-CD8br%CD8br以及PDL-1 on monocyte免疫细胞表型与膝骨关节炎之间可能具有较为显著的潜在因果关系,这为研究膝骨关节炎的生物学机制及探索膝骨关节炎的早期防治提供有价值的线索,也为干预性药物的开发提供了新的方向。
文摘锂离子电池储能电站火灾事故频繁发生且损失严重,对锂离子电池储能电站火灾风险开展研究可有效预防火灾的发生。首先根据物理-事理-人理(WSR)理论,构建锂电池特性、消防设施、安全管理和人员因素4个一级指标、12个二级指标和32个三级指标的锂离子电池储能电站火灾风险评价指标体系;然后运用序关系分析(G1)法确定各评价指标的主观权重,采用CRITIC法(Criteria Importance Though Intercriteria Correlation,CRITIC)确定客观权重,基于拉格朗日乘法优化后的最小信息熵原理确定组合权重,并结合云模型理论建立锂离子电池储能电站火灾风险评价模型。以某磷酸铁锂储能电站为例开展火灾风险等级评价,结果表明:储能电站火灾风险综合云特征值为(71.3104,1.2142,0.2568),火灾风险等级处于“中风险”,在运行环境和防火设计等方面存在较严重的问题并亟需改进。评价结果与实际火灾风险等级相符,实例证明锂离子电池储能电站火灾风险评价模型能够较准确地反映储能电站火灾风险情况,为锂离子电池储能电站火灾预防与风险管控提供参考。
