In this paper, 2201 and 2212 phases as the corresponding precursor of forming 2212 and 2223 phases are discussed,and the constructive process of unit cell of 2201 phase is ascertained by XRD and chemical kinetics me...In this paper, 2201 and 2212 phases as the corresponding precursor of forming 2212 and 2223 phases are discussed,and the constructive process of unit cell of 2201 phase is ascertained by XRD and chemical kinetics method. Subsequently, the process of 221展开更多
Construction organizations have a common practice to purchase and to deliver required materials to construction sitesabout one month before activities start. This leads to uneconomical inventory on site and contractor...Construction organizations have a common practice to purchase and to deliver required materials to construction sitesabout one month before activities start. This leads to uneconomical inventory on site and contractors’ warehouses. Thispaper investigates the feasibility in implementing material management in construction. United Kingdom and HongKong are selected for the investigation as one has a long implementation period and another one is just implementingmaterial management as noted by interviewed contractors. Questionnaires and structured interviews are conducted.It is found that United Kingdom construction industry benefi ts are more signifi cant than that in Hong Kong. Thiscan stimulate interests in implementing material management in Hong Kong. Respondents from Hong Kong claimedthat their companies will be willing to implement material management where practicable. This study can also helpcountries currently implementing material management. From that, waste generation can be reduced and a greenconstruction environment can be achieved. Recommendations to improve the implementation are also discussed.展开更多
The syntheses and structures of trinuclear Mo (W)-Fe-S cluster[MFe2S2(CO)8 (S,CNSEt2)]- (M=Mo, W), hexanuclear Fe-S cluster [Fe6S6-(CO)12]2- and undecanuclear Cu-Fe-S cluster [Cu5Fe6S6(CO)18(PPh3)2]-, containingFe2S2(...The syntheses and structures of trinuclear Mo (W)-Fe-S cluster[MFe2S2(CO)8 (S,CNSEt2)]- (M=Mo, W), hexanuclear Fe-S cluster [Fe6S6-(CO)12]2- and undecanuclear Cu-Fe-S cluster [Cu5Fe6S6(CO)18(PPh3)2]-, containingFe2S2(CO)6-units bave been summarized and the important vestiges left in their struc-tures reflecting the formation processes of the clusters have been found and discussed.Further inspecting some other typical clusters a regular unit construction in the forma-tion of the metal cluster compounds containing Fe2S2(CO)6-units has been figured outand applied to speculate and predict several new cluster compounds containing Fe2S2(CO)6-units.展开更多
The unit modular technique is one in which unit modules are prefabricated in a factory and then constructed at a construction site. That is why an important process, transport of unit module, is added in this techniqu...The unit modular technique is one in which unit modules are prefabricated in a factory and then constructed at a construction site. That is why an important process, transport of unit module, is added in this technique. However, it is not easy to transport a unit module that is high prefabrication ratio （prefab. ratio） （70-90%）, since the walls and interior and exterior materials installed in it can become broken when the unit module is fixed using general fixation tools, including ropes and fixing belts. When the external wall, windows, etc. are damaged during the transportation, the efficiency of unit modular method is deteriorated. Taking this into account, the purpose of this study is to develop an improved fixation device that is convenient for fixing a unit module with a high prefab, ratio to a vehicle and securing the safety while running. The L-type adapter block proposed in this study was evaluated the structural safety through simulation method. The result of the simulation is that it seems desirable to set the working load of the L-type adapter block as 15 kN for Case 1 and 30 kN for Case 2. Therefore, when the L-type adapter block is utilized under the conditions in which the same load is applied as in Case 2, it is expected that safety will be improved.展开更多
With the continuous advancement of China's urbanization process,the demand for construction projects is increasing,which is both an opportunity and a challenge for construction companies.If the enterprises themsel...With the continuous advancement of China's urbanization process,the demand for construction projects is increasing,which is both an opportunity and a challenge for construction companies.If the enterprises themselves can grasp the background and policy conditions to maintain a high level of construction engineering,then its enterprise benefits and future development prospects will be excellent.However,there are also many companies whose own reputation and actual benefits have been affected for poor engineering quality caused by poor construction management.This is exactly what we must pay attention to.This article will analyse and explore the relevant work to improve the engineering quality of different phases of engineering construction and to guide the management of the construction unit in the future from the perspective of the construction unit to strengthen the project quality supervision.展开更多
Deteriorating continuously, cybersecurity issue has become the focal point of global attention and the grave concern from countries of the world since around 2010. The United States, a country of most developed intern...Deteriorating continuously, cybersecurity issue has become the focal point of global attention and the grave concern from countries of the world since around 2010. The United States, a country of most developed internet technology, is also the most serious victimized country subjected to cyber attacks. After more than 10 years of tremendous funding and energy investment, the United States, at present stage, has built a relatively impeccable, government-led system of cybersecurity strategy. This strategic system is characterized by a full-fledged combination of offensive and defensive capabilities which takes full advantage of America＇s technological superiority, and the primary purpose of this system is forming strategic deterrence. This paper is designed to provide an interpretation of the specific components and nature of this strategy and hopes to reveal the possible enlightenment on how to manage cybersecurity discrepancy between China and America and its constructive implication to China＇s construction of cybersecurity strategy.展开更多
文摘In this paper, 2201 and 2212 phases as the corresponding precursor of forming 2212 and 2223 phases are discussed,and the constructive process of unit cell of 2201 phase is ascertained by XRD and chemical kinetics method. Subsequently, the process of 221
文摘Construction organizations have a common practice to purchase and to deliver required materials to construction sitesabout one month before activities start. This leads to uneconomical inventory on site and contractors’ warehouses. Thispaper investigates the feasibility in implementing material management in construction. United Kingdom and HongKong are selected for the investigation as one has a long implementation period and another one is just implementingmaterial management as noted by interviewed contractors. Questionnaires and structured interviews are conducted.It is found that United Kingdom construction industry benefi ts are more signifi cant than that in Hong Kong. Thiscan stimulate interests in implementing material management in Hong Kong. Respondents from Hong Kong claimedthat their companies will be willing to implement material management where practicable. This study can also helpcountries currently implementing material management. From that, waste generation can be reduced and a greenconstruction environment can be achieved. Recommendations to improve the implementation are also discussed.
文摘The syntheses and structures of trinuclear Mo (W)-Fe-S cluster[MFe2S2(CO)8 (S,CNSEt2)]- (M=Mo, W), hexanuclear Fe-S cluster [Fe6S6-(CO)12]2- and undecanuclear Cu-Fe-S cluster [Cu5Fe6S6(CO)18(PPh3)2]-, containingFe2S2(CO)6-units bave been summarized and the important vestiges left in their struc-tures reflecting the formation processes of the clusters have been found and discussed.Further inspecting some other typical clusters a regular unit construction in the forma-tion of the metal cluster compounds containing Fe2S2(CO)6-units has been figured outand applied to speculate and predict several new cluster compounds containing Fe2S2(CO)6-units.
文摘The unit modular technique is one in which unit modules are prefabricated in a factory and then constructed at a construction site. That is why an important process, transport of unit module, is added in this technique. However, it is not easy to transport a unit module that is high prefabrication ratio （prefab. ratio） （70-90%）, since the walls and interior and exterior materials installed in it can become broken when the unit module is fixed using general fixation tools, including ropes and fixing belts. When the external wall, windows, etc. are damaged during the transportation, the efficiency of unit modular method is deteriorated. Taking this into account, the purpose of this study is to develop an improved fixation device that is convenient for fixing a unit module with a high prefab, ratio to a vehicle and securing the safety while running. The L-type adapter block proposed in this study was evaluated the structural safety through simulation method. The result of the simulation is that it seems desirable to set the working load of the L-type adapter block as 15 kN for Case 1 and 30 kN for Case 2. Therefore, when the L-type adapter block is utilized under the conditions in which the same load is applied as in Case 2, it is expected that safety will be improved.
文摘With the continuous advancement of China's urbanization process,the demand for construction projects is increasing,which is both an opportunity and a challenge for construction companies.If the enterprises themselves can grasp the background and policy conditions to maintain a high level of construction engineering,then its enterprise benefits and future development prospects will be excellent.However,there are also many companies whose own reputation and actual benefits have been affected for poor engineering quality caused by poor construction management.This is exactly what we must pay attention to.This article will analyse and explore the relevant work to improve the engineering quality of different phases of engineering construction and to guide the management of the construction unit in the future from the perspective of the construction unit to strengthen the project quality supervision.
文摘Deteriorating continuously, cybersecurity issue has become the focal point of global attention and the grave concern from countries of the world since around 2010. The United States, a country of most developed internet technology, is also the most serious victimized country subjected to cyber attacks. After more than 10 years of tremendous funding and energy investment, the United States, at present stage, has built a relatively impeccable, government-led system of cybersecurity strategy. This strategic system is characterized by a full-fledged combination of offensive and defensive capabilities which takes full advantage of America＇s technological superiority, and the primary purpose of this system is forming strategic deterrence. This paper is designed to provide an interpretation of the specific components and nature of this strategy and hopes to reveal the possible enlightenment on how to manage cybersecurity discrepancy between China and America and its constructive implication to China＇s construction of cybersecurity strategy.
