This paper describes an extension and a new foundation of the Standard Model of particle physics based on a SU(4)-force called hyper-color, and on preon subparticles. The hyper-color force is a generalization of the S...This paper describes an extension and a new foundation of the Standard Model of particle physics based on a SU(4)-force called hyper-color, and on preon subparticles. The hyper-color force is a generalization of the SU(2)-based weak interaction and the SU(1)-based right-chiral self-interaction, in which the W-and the Z-bosons are Yukawa residual-field-carriers of the hyper-color force, in the same sense as the pions are the residual-field-carriers of the color SU(3) interaction. Using the method of numerical minimization of the SU(4)-action based on this model, the masses and the inner structure of leptons, quarks and weak bosons are calculated: the mass results are very close to the experimental values. We calculate also precisely the value of the Cabibbo angle, so the mixing matrices of the Standard model, CKM matrix for quarks and PMNS matrix for neutrinos can also be calculated. In total, we reduce the 29 parameters of the Standard Model to a total of 7 parameters.展开更多
背景:随着无牙颌修复需求增加,“All-on-4”技术被广泛应用。种植体与天然牙的载荷传递方式不同,三维有限元分析可研究功能载荷作用下种植体及周围骨组织的应力分布,并在此基础上为寻找适合的种植体材料、优化种植体的几何结构、设计临...背景:随着无牙颌修复需求增加,“All-on-4”技术被广泛应用。种植体与天然牙的载荷传递方式不同,三维有限元分析可研究功能载荷作用下种植体及周围骨组织的应力分布,并在此基础上为寻找适合的种植体材料、优化种植体的几何结构、设计临床手术方案提供了研究方法。目的:对三维有限元分析法在“All-on-4”技术方面的相关研究作一综述。方法:检索中国知网和PubMed数据库2003-2023年相关文献,英文检索词为“Finite Element Method,All-on-4,edentulous,Biomechanics”,中文检索词为“有限元,All-on-4,无牙颌,生物力学”,根据纳入排除标准筛选符合标准的文献,最终纳入65篇文献进行综述。结果与结论:①对水平骨量不足的情况,研究者们可以选择应用窄直径种植体,但需要注意悬臂的存在对应力分布的影响,降低失败的风险。②“All-on-4”概念通过倾斜远中种植体的方法,减少骨的应力分布,但在不同的颌骨类型中,远中种植体倾斜的理想角度还需要进一步的研究。③悬臂的存在会增加种植失败的风险,将悬臂长度/AP距(CL/AP)的比值控制在0.9时,有助于减少机械并发症的发生。④用弹性模量较低的材料制作支架时,支架自身的应力较小,但会增加种植体、中央螺丝、基台及种植体周围骨组织的应力,相反使用弹性模量较大的材料,会降低修复体组件和种植体周围骨组织的应力,但支架本身的应力较高。⑤“All-on-4”概念可以实现较好的力学平衡,但需结合患者自身的具体情况制定一个长期有效的治疗方案。⑥合理的咬合设计是影响种植治疗成功的关键,尖牙引导牙合和组牙功能牙合在修复体的寿命方面无差异。然而,影响咬合设计的原因有很多,未来还需要进一步的体外实验以及大量临床研究来探索“All-on-4”理想的咬合设计。展开更多
This paper reports that low-temperature heat capacities of 4-（2-aminoethyl）-phenol （C8H11NO） are measured by a precision automated adiabatic calorimeter over the temperature range from 78 to 400 K. A polynomial eq...This paper reports that low-temperature heat capacities of 4-（2-aminoethyl）-phenol （C8H11NO） are measured by a precision automated adiabatic calorimeter over the temperature range from 78 to 400 K. A polynomial equation of heat capacities as a function of the temperature was fitted by the least square method. Based on the fitted polynomial, the smoothed heat capacities and thermodynamic functions of the compound relative to the standard reference temperature 298.15K were calculated and tabulated at the interval of 5K. The energy equivalent, εcalor, of the oxygen-bomb combustion calorimeter has been determined from 0.68g of NIST 39i benzoic acid to be εcalor=（14674.69±17.49）J·K^-1. The constant-volume energy of combustion of the compound at T=298.15 K was measured by a precision oxygen-bomb combustion calorimeter to be ΔcU=-（32374.25±12.93）J·g^-1. The standard molar enthalpy of combustion for the compound was calculated to be ΔcHm = -（4445.47 ± 1.77） kJ·mol^-1 according to the definition of enthalpy of combustion and other thermodynamic principles. Finally, the standard molar enthalpy of formation of the compound was derived to be ΔfHm（C8H11NO, s）=-（274.68 ±2.06） kJ·mol^-1, in accordance with Hess law.展开更多
In South Korea,the vocational education and training institutions,such as the vocational colleges,the vocational high schools,and the vocational training institutions is applying the National Competency Standards(NCS)...In South Korea,the vocational education and training institutions,such as the vocational colleges,the vocational high schools,and the vocational training institutions is applying the National Competency Standards(NCS).NCS is function as a key link in development of the human resource development(HRD),linking work,education and training,and qualifications by analyzing and presenting systematically the job demands of the industrial field.The 4-year universities that focus generally on the theoretical studies do not yet have applied NCS in South Korea.However,in the case of 4-year universities,the importance of professional education is emphasized by being derived and independed from more precise the individual science through the advancement of science and technology,and the division of social functions.Therefore,it is desirable to apply NCS to improve the practical expertise of 4-year university students.For this purpose,this study aims to compare the curriculum of national K-University and the NCS contents,and to find out how to apply it to the curriculum of 4-year universities in order to bring about the functions and the characteristics of education and training.展开更多
General Administration of Quality Supervision, Inspection and Quarantine of P.R. China and Standardization Administration of China and Standardization Administration of China have approved the following 314 national s...General Administration of Quality Supervision, Inspection and Quarantine of P.R. China and Standardization Administration of China and Standardization Administration of China have approved the following 314 national standards.展开更多
Instrument calibration is vital to a successful control system because signal inputs to the system controllers come from such instruments. This paper presents a method for actualizing a standard low-cost loop calibrat...Instrument calibration is vital to a successful control system because signal inputs to the system controllers come from such instruments. This paper presents a method for actualizing a standard low-cost loop calibrator for the famous 4-20 mA electrical signaling scheme. The loop calibrator generates a linear current signal from 4 to 20 mA over a 250 ? typical process instrument load for calibration. The realization of the loop calibrator relies on a voltage-to-current converter to build a constant current source. The voltage controlled constant current source is built from discrete components and an op-amp to keep the cost low. Results from simulations and the prototype demonstrate the performance of the 4-20 mA loop calibrator which utilizes a greatly reduced number of components. The cost of these components is approximately 34% of the least expensive calibrator sampled, though other production costs are not included. This conclusion reinforces the fact that loop calibrators can be cheaper.展开更多
General Administration of Quality Supervision,Inspection and Quarantine of P.R. China and Standardization Administration of China have approved the following 3 national standards and publicize now.
The complexes of zinc chloride and zinc nitrate with 2 amino 4,6 dimethyl pyrimidine (ADMP) were prepared through reflux in alcohol. The compositions of the complexes Zn(ADMP)2Cl2 (b) and Zn(ADMP)2(NO3)2·4H2O (c)...The complexes of zinc chloride and zinc nitrate with 2 amino 4,6 dimethyl pyrimidine (ADMP) were prepared through reflux in alcohol. The compositions of the complexes Zn(ADMP)2Cl2 (b) and Zn(ADMP)2(NO3)2·4H2O (c) were determined by chemical and elemental analyses. The complexes were characterized by IR, XPS, 1H NMR and TG DTG techniques. The constant volume combustion energies of ADMP and the complexes, ΔcE, were determined by a precise rotating bomb calorimeter at 298.15K. They were (-3664.53±1.18)kJ·mol-1, (-7130.94±3.69)kJ·mol-1, and (-7637.87±5.71)kJ·mol-1. Their standard enthalpies of combustion,, and standard enthalpies of formation, , were calculated. They were (-3666.39±1.18)kJ·mol-1, (-7129.70±3.69)kJ·mol-1, (-7632.91 ±5.71)kJ·mol-1 and (19.09±1.43)kJ·mol-1, (-411.96±4.03)kJ·mol-1, (-1153.28±6.02)kJ·mol-1.展开更多
文摘This paper describes an extension and a new foundation of the Standard Model of particle physics based on a SU(4)-force called hyper-color, and on preon subparticles. The hyper-color force is a generalization of the SU(2)-based weak interaction and the SU(1)-based right-chiral self-interaction, in which the W-and the Z-bosons are Yukawa residual-field-carriers of the hyper-color force, in the same sense as the pions are the residual-field-carriers of the color SU(3) interaction. Using the method of numerical minimization of the SU(4)-action based on this model, the masses and the inner structure of leptons, quarks and weak bosons are calculated: the mass results are very close to the experimental values. We calculate also precisely the value of the Cabibbo angle, so the mixing matrices of the Standard model, CKM matrix for quarks and PMNS matrix for neutrinos can also be calculated. In total, we reduce the 29 parameters of the Standard Model to a total of 7 parameters.
文摘背景:随着无牙颌修复需求增加,“All-on-4”技术被广泛应用。种植体与天然牙的载荷传递方式不同,三维有限元分析可研究功能载荷作用下种植体及周围骨组织的应力分布,并在此基础上为寻找适合的种植体材料、优化种植体的几何结构、设计临床手术方案提供了研究方法。目的:对三维有限元分析法在“All-on-4”技术方面的相关研究作一综述。方法:检索中国知网和PubMed数据库2003-2023年相关文献,英文检索词为“Finite Element Method,All-on-4,edentulous,Biomechanics”,中文检索词为“有限元,All-on-4,无牙颌,生物力学”,根据纳入排除标准筛选符合标准的文献,最终纳入65篇文献进行综述。结果与结论:①对水平骨量不足的情况,研究者们可以选择应用窄直径种植体,但需要注意悬臂的存在对应力分布的影响,降低失败的风险。②“All-on-4”概念通过倾斜远中种植体的方法,减少骨的应力分布,但在不同的颌骨类型中,远中种植体倾斜的理想角度还需要进一步的研究。③悬臂的存在会增加种植失败的风险,将悬臂长度/AP距(CL/AP)的比值控制在0.9时,有助于减少机械并发症的发生。④用弹性模量较低的材料制作支架时,支架自身的应力较小,但会增加种植体、中央螺丝、基台及种植体周围骨组织的应力,相反使用弹性模量较大的材料,会降低修复体组件和种植体周围骨组织的应力,但支架本身的应力较高。⑤“All-on-4”概念可以实现较好的力学平衡,但需结合患者自身的具体情况制定一个长期有效的治疗方案。⑥合理的咬合设计是影响种植治疗成功的关键,尖牙引导牙合和组牙功能牙合在修复体的寿命方面无差异。然而,影响咬合设计的原因有很多,未来还需要进一步的体外实验以及大量临床研究来探索“All-on-4”理想的咬合设计。
基金supported by the National Natural Science Foundation of China (Grant No 20673050)
文摘This paper reports that low-temperature heat capacities of 4-（2-aminoethyl）-phenol （C8H11NO） are measured by a precision automated adiabatic calorimeter over the temperature range from 78 to 400 K. A polynomial equation of heat capacities as a function of the temperature was fitted by the least square method. Based on the fitted polynomial, the smoothed heat capacities and thermodynamic functions of the compound relative to the standard reference temperature 298.15K were calculated and tabulated at the interval of 5K. The energy equivalent, εcalor, of the oxygen-bomb combustion calorimeter has been determined from 0.68g of NIST 39i benzoic acid to be εcalor=（14674.69±17.49）J·K^-1. The constant-volume energy of combustion of the compound at T=298.15 K was measured by a precision oxygen-bomb combustion calorimeter to be ΔcU=-（32374.25±12.93）J·g^-1. The standard molar enthalpy of combustion for the compound was calculated to be ΔcHm = -（4445.47 ± 1.77） kJ·mol^-1 according to the definition of enthalpy of combustion and other thermodynamic principles. Finally, the standard molar enthalpy of formation of the compound was derived to be ΔfHm（C8H11NO, s）=-（274.68 ±2.06） kJ·mol^-1, in accordance with Hess law.
文摘In South Korea,the vocational education and training institutions,such as the vocational colleges,the vocational high schools,and the vocational training institutions is applying the National Competency Standards(NCS).NCS is function as a key link in development of the human resource development(HRD),linking work,education and training,and qualifications by analyzing and presenting systematically the job demands of the industrial field.The 4-year universities that focus generally on the theoretical studies do not yet have applied NCS in South Korea.However,in the case of 4-year universities,the importance of professional education is emphasized by being derived and independed from more precise the individual science through the advancement of science and technology,and the division of social functions.Therefore,it is desirable to apply NCS to improve the practical expertise of 4-year university students.For this purpose,this study aims to compare the curriculum of national K-University and the NCS contents,and to find out how to apply it to the curriculum of 4-year universities in order to bring about the functions and the characteristics of education and training.
文摘General Administration of Quality Supervision, Inspection and Quarantine of P.R. China and Standardization Administration of China and Standardization Administration of China have approved the following 314 national standards.
文摘Instrument calibration is vital to a successful control system because signal inputs to the system controllers come from such instruments. This paper presents a method for actualizing a standard low-cost loop calibrator for the famous 4-20 mA electrical signaling scheme. The loop calibrator generates a linear current signal from 4 to 20 mA over a 250 ? typical process instrument load for calibration. The realization of the loop calibrator relies on a voltage-to-current converter to build a constant current source. The voltage controlled constant current source is built from discrete components and an op-amp to keep the cost low. Results from simulations and the prototype demonstrate the performance of the 4-20 mA loop calibrator which utilizes a greatly reduced number of components. The cost of these components is approximately 34% of the least expensive calibrator sampled, though other production costs are not included. This conclusion reinforces the fact that loop calibrators can be cheaper.
文摘General Administration of Quality Supervision,Inspection and Quarantine of P.R. China and Standardization Administration of China have approved the following 3 national standards and publicize now.
文摘The complexes of zinc chloride and zinc nitrate with 2 amino 4,6 dimethyl pyrimidine (ADMP) were prepared through reflux in alcohol. The compositions of the complexes Zn(ADMP)2Cl2 (b) and Zn(ADMP)2(NO3)2·4H2O (c) were determined by chemical and elemental analyses. The complexes were characterized by IR, XPS, 1H NMR and TG DTG techniques. The constant volume combustion energies of ADMP and the complexes, ΔcE, were determined by a precise rotating bomb calorimeter at 298.15K. They were (-3664.53±1.18)kJ·mol-1, (-7130.94±3.69)kJ·mol-1, and (-7637.87±5.71)kJ·mol-1. Their standard enthalpies of combustion,, and standard enthalpies of formation, , were calculated. They were (-3666.39±1.18)kJ·mol-1, (-7129.70±3.69)kJ·mol-1, (-7632.91 ±5.71)kJ·mol-1 and (19.09±1.43)kJ·mol-1, (-411.96±4.03)kJ·mol-1, (-1153.28±6.02)kJ·mol-1.
