In the current social environment,the importance of energy conservation and emission reduction is increasing day by day for both the country and its people.Electronic and electrical products,as important items for peo...In the current social environment,the importance of energy conservation and emission reduction is increasing day by day for both the country and its people.Electronic and electrical products,as important items for people’s production and life,require high attention from industry insiders in terms of their energy efficiency testing.Relying on energy efficiency testing can achieve the goal of energy conservation and emission reduction,and related quality control technologies will also inject new momentum into the green development of the industry.This article will discuss the practical strategies of quality control technology for energy efficiency testing of electronic and electrical products based on the significance of such testing,hoping to provide some help.展开更多
Slope excavation is one of the most crucial steps in the construction of a hydraulic project. Excavation project quality assessment and excavated volume calculation are critical in construction management. The positio...Slope excavation is one of the most crucial steps in the construction of a hydraulic project. Excavation project quality assessment and excavated volume calculation are critical in construction management. The positioning of excavation projects using traditional instruments is inefficient and may cause error. To improve the efficiency and precision of calculation and assessment, three-dimensional laser scanning technology was used for slope excavation quality assessment. An efficient data acquisition, processing, and management workflow was presented in this study. Based on the quality control indices, including the average gradient, slope toe elevation, and overbreak and underbreak,cross-sectional quality assessment and holistic quality assessment methods were proposed to assess the slope excavation quality with laserscanned data. An algorithm was also presented to calculate the excavated volume with laser-scanned data. A field application and a laboratory experiment were carried out to verify the feasibility of these methods for excavation quality assessment and excavated volume calculation. The results show that the quality assessment indices can be obtained rapidly and accurately with design parameters and scanned data, and the results of holistic quality assessment are consistent with those of cross-sectional quality assessment. In addition, the time consumption in excavation quality assessment with the laser scanning technology can be reduced by 70%e90%, as compared with the traditional method. The excavated volume calculated with the scanned data only slightly differs from measured data, demonstrating the applicability of the excavated volume calculation method presented in this study.展开更多
Based on the actual project, this paper first briefly expounds the design advantages and construction technology of urban comprehensive pipe gallery, and then analyzes the construction technology of comprehensive pipe...Based on the actual project, this paper first briefly expounds the design advantages and construction technology of urban comprehensive pipe gallery, and then analyzes the construction technology of comprehensive pipe gallery from the aspects of construction preparation, formwork construction, surveying and setting out, earth excavation, concrete pouring, scaffold installation and demolition, and puts forward quality control measures. It aims to effectively reduce the waste of resources and funds and ensure the construction quality and safety of the project.展开更多
Recently, the universities of science and technology pay more attention to their own specialized subjects and tak, little notice of humanities. This phenomenon results in the weakness of college students＇ humanistic ...Recently, the universities of science and technology pay more attention to their own specialized subjects and tak, little notice of humanities. This phenomenon results in the weakness of college students＇ humanistic qualities, Therefore, cultivating and enhancing students＇ humanistic qualities in universities of science and technolog become the main issues that are viewed intensively by the current educational circles. This paper analyzes th, current situation of English and American literature optional courses in universities of science and technolog3, gives the importance of offering the optional courses of English and American literature, and analyzes the activ roles and important significance of optional courses of English and American literature in the course of humanisti qualities of students in universities of science and technology. This paper also gives the necessities and ne~ methods of giving the optional courses of English and American literature under the circumstances of colleg, English teaching reform展开更多
With the method of questionary, the author has carried out careful investigation concerning the qualities of science and technology of Dalian municipal leading officials. It has basiclly reflected the degree of unders...With the method of questionary, the author has carried out careful investigation concerning the qualities of science and technology of Dalian municipal leading officials. It has basiclly reflected the degree of understanding and grasping of the policies and knowledge of science and technology by the leading officials in Dalian municipal organizations and cause units. Some of the questions have been proved by the experts which have rather strong effectiveness and comparably.展开更多
Shijiuyang Constructed Wetland（110 hm^2） is a drinking water source treatment wetland with primary structural units of ponds and plant-bed/ditch systems. The wetland can process about 250,000 tonnes of source water ...Shijiuyang Constructed Wetland（110 hm^2） is a drinking water source treatment wetland with primary structural units of ponds and plant-bed/ditch systems. The wetland can process about 250,000 tonnes of source water in the Xincheng River every day and supplies raw water for Shijiuyang Drinking Water Plant. Daily data for 28 months indicated that the major water quality indexes of source water had been improved by one grade. The percentage increase for dissolved oxygen and the removal rates of ammonia nitrogen, iron and manganese were 73.63%, 38.86%, 35.64%, and 22.14% respectively. The treatment performance weight of ponds and plant-bed/ditch systems was roughly equal but they treated different pollutants preferentially. Most water quality indexes had better treatment efficacy with increasing temperature and inlet concentrations. These results revealed that the pond–wetland complexes exhibited strong buffering capacity for source water quality improvement. The treatment cost of Shijiuyang Drinking Water Plant was reduced by about 30.3%. Regional rainfall significantly determined the external river water levels and adversely deteriorated the inlet water quality, thus suggesting that the ＂hidden＂ diffuse pollution in the multitudinous stream branches as well as their catchments should be the controlling emphases for river source water protection in the future. The combination of pond and plant-bed/ditch systems provides a successful paradigm for drinking water source pretreatment. Three other drinking water source treatment wetlands with ponds and plant-bed/ditch systems are in operation or construction in the stream networks of the Yangtze River Delta and more people will be benefited.展开更多
Intensive agricultural practices have undeniably reduced soil fertility and crop productivity.Furthermore,alkaline calcareous soils represent a significant challenge for agricultural production,particularly durum whea...Intensive agricultural practices have undeniably reduced soil fertility and crop productivity.Furthermore,alkaline calcareous soils represent a significant challenge for agricultural production,particularly durum wheat,which is vital for ensuring food security.It is therefore essential to explore new cereal management strategies to maintain food production and promote crop sustainability.The application of soil microorganisms,particularly plant growth–promoting rhizobacteria(PGPR),as inoculants to enhance crop production is a growing area of interest.This study investigates the effects of the rhizobacteria Paenibacillus polymyxa SGH1 and SGK2,applied both individually and in combination,on the growth and productivity of durum wheat in alkaline calcareous soil.We conducted field experiments over two growing seasons using a randomized complete block design with three blocks,considering four treatments:non-inoculated wheat grains(T0),inoculation with the P.polymyxa SGH1 strain(T1),inoculation with the P.polymyxa SGK2 strain(T2),and co-inoculation with both strains(T3).The results clearly showed that SGH1 and SGK2 inoculation improved the morphometric characteristics of wheat plants,with co-inoculation of both strains that induced more pronounced improvements compared to T0 in terms of collar diameter(+16.9%),tillers plant-1(+89.8%),and SA/RA ratio(+35.5%).Co-inoculation was also the most effective treatment for improving the wheat grain yield(+41.1%in season I and+16.6%in season Ⅱ).In addition,T3 significantly increased the grain starch content(+220%).T1 determined the highest grain protein content in both seasons(9.5%in season Ⅰand 9.66%DW in season Ⅱ).This study demonstrated that bacterial inoculation and co-inoculation strategies can significantly enhance wheat productivity and grain quality in alkaline calcareous soils while reducing at the same time the ecological footprint of agriculture.展开更多
A 10-MHz face shear （FS） square micro- mechanical resonator based on silicon-on-insulator （SO1） technology is presented in this paper. In order to examine the improvement of quality factor as well as motional resi...A 10-MHz face shear （FS） square micro- mechanical resonator based on silicon-on-insulator （SO1） technology is presented in this paper. In order to examine the improvement of quality factor as well as motional resistance Rx in this structure, the center-stem anchor is employed in this study. The benefit of anchoring the square in the center, which is the nodal point, is that the energy losses through the anchor can be minimized. Hence, a quality factor value of 2.0 million and the motional resistance of 8.2 k~ can be obtained with an FS mode resonator via finite element （FE） simulation. The results show the significance of the FS mode in this design, not only in its structure but also in its square-extensional mode and Lame-mode. Additionally, an SOI-based fabrication process is proposed to support the design.展开更多
文摘In the current social environment,the importance of energy conservation and emission reduction is increasing day by day for both the country and its people.Electronic and electrical products,as important items for people’s production and life,require high attention from industry insiders in terms of their energy efficiency testing.Relying on energy efficiency testing can achieve the goal of energy conservation and emission reduction,and related quality control technologies will also inject new momentum into the green development of the industry.This article will discuss the practical strategies of quality control technology for energy efficiency testing of electronic and electrical products based on the significance of such testing,hoping to provide some help.
基金supported by the National Natural Science Foundation of China(Grant No.51379109)
文摘Slope excavation is one of the most crucial steps in the construction of a hydraulic project. Excavation project quality assessment and excavated volume calculation are critical in construction management. The positioning of excavation projects using traditional instruments is inefficient and may cause error. To improve the efficiency and precision of calculation and assessment, three-dimensional laser scanning technology was used for slope excavation quality assessment. An efficient data acquisition, processing, and management workflow was presented in this study. Based on the quality control indices, including the average gradient, slope toe elevation, and overbreak and underbreak,cross-sectional quality assessment and holistic quality assessment methods were proposed to assess the slope excavation quality with laserscanned data. An algorithm was also presented to calculate the excavated volume with laser-scanned data. A field application and a laboratory experiment were carried out to verify the feasibility of these methods for excavation quality assessment and excavated volume calculation. The results show that the quality assessment indices can be obtained rapidly and accurately with design parameters and scanned data, and the results of holistic quality assessment are consistent with those of cross-sectional quality assessment. In addition, the time consumption in excavation quality assessment with the laser scanning technology can be reduced by 70%e90%, as compared with the traditional method. The excavated volume calculated with the scanned data only slightly differs from measured data, demonstrating the applicability of the excavated volume calculation method presented in this study.
文摘Based on the actual project, this paper first briefly expounds the design advantages and construction technology of urban comprehensive pipe gallery, and then analyzes the construction technology of comprehensive pipe gallery from the aspects of construction preparation, formwork construction, surveying and setting out, earth excavation, concrete pouring, scaffold installation and demolition, and puts forward quality control measures. It aims to effectively reduce the waste of resources and funds and ensure the construction quality and safety of the project.
文摘Recently, the universities of science and technology pay more attention to their own specialized subjects and tak, little notice of humanities. This phenomenon results in the weakness of college students＇ humanistic qualities, Therefore, cultivating and enhancing students＇ humanistic qualities in universities of science and technolog become the main issues that are viewed intensively by the current educational circles. This paper analyzes th, current situation of English and American literature optional courses in universities of science and technolog3, gives the importance of offering the optional courses of English and American literature, and analyzes the activ roles and important significance of optional courses of English and American literature in the course of humanisti qualities of students in universities of science and technology. This paper also gives the necessities and ne~ methods of giving the optional courses of English and American literature under the circumstances of colleg, English teaching reform
文摘With the method of questionary, the author has carried out careful investigation concerning the qualities of science and technology of Dalian municipal leading officials. It has basiclly reflected the degree of understanding and grasping of the policies and knowledge of science and technology by the leading officials in Dalian municipal organizations and cause units. Some of the questions have been proved by the experts which have rather strong effectiveness and comparably.
基金upported by the National Natural Science Foundation of China (No. 51278487)the Major National Water Pollution Control and Management Project of China (Nos. 2012ZX07403-003-03, 2008ZX07421-001)+1 种基金the National Basic Research Program (973) of China (No. 2009CB421103)the Knowledge Innovation Program of the Chinese Academy of Sciences (No. KZCX2-EW-410-05)
文摘Shijiuyang Constructed Wetland（110 hm^2） is a drinking water source treatment wetland with primary structural units of ponds and plant-bed/ditch systems. The wetland can process about 250,000 tonnes of source water in the Xincheng River every day and supplies raw water for Shijiuyang Drinking Water Plant. Daily data for 28 months indicated that the major water quality indexes of source water had been improved by one grade. The percentage increase for dissolved oxygen and the removal rates of ammonia nitrogen, iron and manganese were 73.63%, 38.86%, 35.64%, and 22.14% respectively. The treatment performance weight of ponds and plant-bed/ditch systems was roughly equal but they treated different pollutants preferentially. Most water quality indexes had better treatment efficacy with increasing temperature and inlet concentrations. These results revealed that the pond–wetland complexes exhibited strong buffering capacity for source water quality improvement. The treatment cost of Shijiuyang Drinking Water Plant was reduced by about 30.3%. Regional rainfall significantly determined the external river water levels and adversely deteriorated the inlet water quality, thus suggesting that the ＂hidden＂ diffuse pollution in the multitudinous stream branches as well as their catchments should be the controlling emphases for river source water protection in the future. The combination of pond and plant-bed/ditch systems provides a successful paradigm for drinking water source pretreatment. Three other drinking water source treatment wetlands with ponds and plant-bed/ditch systems are in operation or construction in the stream networks of the Yangtze River Delta and more people will be benefited.
基金QK22020008(National Agency of Agricultural Research of the Czech Republic)TQ03000234(Technological Agency of the Czech Republic)MZE-RO0123(Ministry of Agriculture,CR).
文摘Intensive agricultural practices have undeniably reduced soil fertility and crop productivity.Furthermore,alkaline calcareous soils represent a significant challenge for agricultural production,particularly durum wheat,which is vital for ensuring food security.It is therefore essential to explore new cereal management strategies to maintain food production and promote crop sustainability.The application of soil microorganisms,particularly plant growth–promoting rhizobacteria(PGPR),as inoculants to enhance crop production is a growing area of interest.This study investigates the effects of the rhizobacteria Paenibacillus polymyxa SGH1 and SGK2,applied both individually and in combination,on the growth and productivity of durum wheat in alkaline calcareous soil.We conducted field experiments over two growing seasons using a randomized complete block design with three blocks,considering four treatments:non-inoculated wheat grains(T0),inoculation with the P.polymyxa SGH1 strain(T1),inoculation with the P.polymyxa SGK2 strain(T2),and co-inoculation with both strains(T3).The results clearly showed that SGH1 and SGK2 inoculation improved the morphometric characteristics of wheat plants,with co-inoculation of both strains that induced more pronounced improvements compared to T0 in terms of collar diameter(+16.9%),tillers plant-1(+89.8%),and SA/RA ratio(+35.5%).Co-inoculation was also the most effective treatment for improving the wheat grain yield(+41.1%in season I and+16.6%in season Ⅱ).In addition,T3 significantly increased the grain starch content(+220%).T1 determined the highest grain protein content in both seasons(9.5%in season Ⅰand 9.66%DW in season Ⅱ).This study demonstrated that bacterial inoculation and co-inoculation strategies can significantly enhance wheat productivity and grain quality in alkaline calcareous soils while reducing at the same time the ecological footprint of agriculture.
基金supported by the National Natural Science Foundation of Chinathe China Academy of Engineering Physics under Grand No.11176006
文摘A 10-MHz face shear （FS） square micro- mechanical resonator based on silicon-on-insulator （SO1） technology is presented in this paper. In order to examine the improvement of quality factor as well as motional resistance Rx in this structure, the center-stem anchor is employed in this study. The benefit of anchoring the square in the center, which is the nodal point, is that the energy losses through the anchor can be minimized. Hence, a quality factor value of 2.0 million and the motional resistance of 8.2 k~ can be obtained with an FS mode resonator via finite element （FE） simulation. The results show the significance of the FS mode in this design, not only in its structure but also in its square-extensional mode and Lame-mode. Additionally, an SOI-based fabrication process is proposed to support the design.
