To exchange experiences and progress in standardization capacity building at home and abroad,the sub-forum on capacity building and creating leadership in standardization was held on July 9.The sub-forum was hosted by...To exchange experiences and progress in standardization capacity building at home and abroad,the sub-forum on capacity building and creating leadership in standardization was held on July 9.The sub-forum was hosted by the Qingdao Municipal People’s Government and co-organized by the International Standardization Training Base(Qingdao),Qingdao University,International Standardization Outstanding Contribution Foundation,and Shandong National Standards Center of Technical Evaluation,which was expected to inject new vitality into the industrial development and provide new ideas for improving the talent cultivation system.展开更多
The molar heat capacities(C_p) of guaiacol(CAS 90-50-1) and acetyl guaiacol ester(AGE, CAS 613-70-7) were determinated from 290 K to 350 K by differential scanning calorimetry(DSC), and expressed as a function of temp...The molar heat capacities(C_p) of guaiacol(CAS 90-50-1) and acetyl guaiacol ester(AGE, CAS 613-70-7) were determinated from 290 K to 350 K by differential scanning calorimetry(DSC), and expressed as a function of temperature. Two kinds of group contribution models were used to estimate the molar heat capacities of both guaiacol and AGE, the average relative deviation is less than 10%. The standard molar enthalpies of combustion of guaiacol and AGE were- 3590.0 k J·mol^(-1)and- 4522.1 k J·mol^(-1) by a precise thermal isolation Oxygen Bomb Calorimeter. The standard molar enthalpies of formation of guaiacol and AGE in a liquid state at298.15 K were calculated to be- 307.95 k J·mol^(-1) and- 448.72 k J·mol^(-1), respectively, based on the standard molar enthalpies of combustion. The thermodynamic properties are useful for exploiting the new synthesis method, engineering design and industry production of AGE using guaiacol as a raw material.展开更多
Anti-floating design of building engineering is a very important link in many engineering design links.In recent years, some cases of basement anti floating engineering failure have been exposed in the media, and the ...Anti-floating design of building engineering is a very important link in many engineering design links.In recent years, some cases of basement anti floating engineering failure have been exposed in the media, and the scene is often shocking, which also rings the alarm bell for the majority of designers. The technical standard for anti floating of Building Engineering (jgj476-2019) issued and implemented by the Ministry of housing and urban rural development on March 1, 2020 is timely and effective, which provides a powerful and reliable technical implementation standard for anti floating design, construction, monitoring and detection.The author studies and uses this standard, compares other standards and combines with the engineering practice, and finds that when the group piles in the anti floating standard are damaged as a whole, it is necessary to further discuss the calculation formula in the corresponding clauses of the standard value of the ultimate bearing capacity of a single anti floating pile.In order to ensure the safety of the design, at the same time, make the theoretical concept clear and clear, but also take into account the principle of economy, this paper discusses this problem as follows.展开更多
文摘To exchange experiences and progress in standardization capacity building at home and abroad,the sub-forum on capacity building and creating leadership in standardization was held on July 9.The sub-forum was hosted by the Qingdao Municipal People’s Government and co-organized by the International Standardization Training Base(Qingdao),Qingdao University,International Standardization Outstanding Contribution Foundation,and Shandong National Standards Center of Technical Evaluation,which was expected to inject new vitality into the industrial development and provide new ideas for improving the talent cultivation system.
文摘The molar heat capacities(C_p) of guaiacol(CAS 90-50-1) and acetyl guaiacol ester(AGE, CAS 613-70-7) were determinated from 290 K to 350 K by differential scanning calorimetry(DSC), and expressed as a function of temperature. Two kinds of group contribution models were used to estimate the molar heat capacities of both guaiacol and AGE, the average relative deviation is less than 10%. The standard molar enthalpies of combustion of guaiacol and AGE were- 3590.0 k J·mol^(-1)and- 4522.1 k J·mol^(-1) by a precise thermal isolation Oxygen Bomb Calorimeter. The standard molar enthalpies of formation of guaiacol and AGE in a liquid state at298.15 K were calculated to be- 307.95 k J·mol^(-1) and- 448.72 k J·mol^(-1), respectively, based on the standard molar enthalpies of combustion. The thermodynamic properties are useful for exploiting the new synthesis method, engineering design and industry production of AGE using guaiacol as a raw material.
文摘Anti-floating design of building engineering is a very important link in many engineering design links.In recent years, some cases of basement anti floating engineering failure have been exposed in the media, and the scene is often shocking, which also rings the alarm bell for the majority of designers. The technical standard for anti floating of Building Engineering (jgj476-2019) issued and implemented by the Ministry of housing and urban rural development on March 1, 2020 is timely and effective, which provides a powerful and reliable technical implementation standard for anti floating design, construction, monitoring and detection.The author studies and uses this standard, compares other standards and combines with the engineering practice, and finds that when the group piles in the anti floating standard are damaged as a whole, it is necessary to further discuss the calculation formula in the corresponding clauses of the standard value of the ultimate bearing capacity of a single anti floating pile.In order to ensure the safety of the design, at the same time, make the theoretical concept clear and clear, but also take into account the principle of economy, this paper discusses this problem as follows.
