In order to construct objective relatively mapping relationship model between customer requirements and product technical characteristics, a novel approach based on customer satisfactions information digging from case...In order to construct objective relatively mapping relationship model between customer requirements and product technical characteristics, a novel approach based on customer satisfactions information digging from case products and satisfaction information of expert technical characteristics was put forward in this paper. Technical characteristics evaluation values were expressed by rough number, and technical characteristics target sequence was determined on the basis of efficiency, cost type and middle type in this method. Use each calculated satisfactions of customers and technical characteristics as input and output elements to construct BP network model. And we use MATLAB software to simulate this BP network model based on the case of electric bicycles.展开更多
Insight is here provided into the socio-economic and technical characteristics of cattle production in the Ndé Division (West Cameroon region). Using a semi-structured questionnaire, information on the activity w...Insight is here provided into the socio-economic and technical characteristics of cattle production in the Ndé Division (West Cameroon region). Using a semi-structured questionnaire, information on the activity was assessed following onsite visits and interviewing breeders. Through a random sampling scheme, 110 breeders in the four subdivisions of the Ndé Division were shadowed. The majority (98.18%) of breeders were men aged 20 to 40 and married (91.82%). They belong to the Mbororo ethnic group, having cumulated more than 10 years in the activity. Most respondents (50.91%) did not attend school and earn their living mainly from livestock (78.18%). Cattle were raised for sale and to feed the breeder’s family (77.27%). The main mode of acquisition of animals was through inheritance (81.82%). The cattle breeds were mostly made up of white Fulani (70%), living in private farms using a combination of stake and barbed wires (67.27%) as fences. The combination of natural fodder and cooking salt was used by most breeders (59.09%) as a daily ration. Reproduction was by natural mating (97.07%). Parasites (internal and external) and foot-and-mouth disease were the main diseases reported by the majority of farmers. Self-treatment (50%) was the main prophylactic measure taken by farmers in case of disease symptoms. Cattle herders faced several challenges, such as insufficient pasture (67.27%), agro-pastoral conflicts (76.36%) and diseases (90.91%). Cattle breeding was rather a widespread activity with no particular restriction.展开更多
The technical characteristics of Sichuan folk furniture were studied from craft aesthetic perspective. The features of Sichuan folk furniture material, technology and structure were analyzed through literature review,...The technical characteristics of Sichuan folk furniture were studied from craft aesthetic perspective. The features of Sichuan folk furniture material, technology and structure were analyzed through literature review, field investigation and expert interview methods, the technical characteristics of Sichuan folk furniture were re-analyzed from craft aesthetic perspective rather than the traditional material and technique research perspectives. The study shows that Sichuan folk furniture technical features contain not only cultural spirit and aesthetic consciousness, but distinctive aesthetic personality as well. Sichuan folk furniture technical characteristics convey Chinese traditional design philosophy, such as theory is based on objects, and it is highly concentrated and concise of aesthetic sentiment in Sichuan folk aesthetic temperament and interest.展开更多
Determining the importance ratings of technical characteristics is a typical group decision-making process. The linguistic-based approach can effectively manage the imprecise and multi-granularity information i;n qual...Determining the importance ratings of technical characteristics is a typical group decision-making process. The linguistic-based approach can effectively manage the imprecise and multi-granularity information i;n quality function deployment and facilitate decision-making in deriving the importance ratings. Based on the linguistic weighted averaging （LWA） operator and the linguistic hybrid averaging （LHA） operator, a practical approach is proposed to first aggregate the individual judgments into a collective value for each technical characteristic under linguistic environment, and then measure the deviation degree of linguistic variables to obtain the importance ratings of technical characteristics. A case study shows the application of the proposed method.展开更多
With the continuous development of social economy and the continuous improvement of people's quality of life, the demand for oil is increasing. There are many places where oil is used in people's lives, such a...With the continuous development of social economy and the continuous improvement of people's quality of life, the demand for oil is increasing. There are many places where oil is used in people's lives, such as cars and other means of transportation. Oil not only plays an important role in people's way of life and travel, but also plays an important role in many other aspects. Therefore, in order to ensure that people's daily life can be carried out in a normal and orderly way, it is necessary to develop the oilfield geology. Only in this way can more oil be mined to ensure people's daily needs. However, in the actual process of oil exploitation, it is difficult to guarantee people's demand simply by manpower. Therefore, in the process of exploiting the oilfield geology, the corresponding development technology should be used to exploit the oilfield, which will effectively improve the efficiency of oilfield exploitation. However, at present, there are still many problems in using oilfield geological development technology, such as the difficulty of exploitation, the benefit of exploitation, the equipment used in oil exploitation, and so on, which will affect the use of oilfield address development technology. Therefore, in order to exploit the oilfield geology smoothly, it is necessary for the relevant enterprises and managers to conduct a comprehensive investigation and understanding of the oilfield geology before exploiting the oil, and to find professional exploiters to design corresponding and perfect countermeasures for the exploitation of the oilfield geology. This can not only ensure the smooth geological exploitation process of the oilfield, but also ensure the economic benefits of related oilfield enterprises. Therefore, the following content is to analyze and study the technical characteristics and development countermeasures of oilfield geological development.展开更多
The LM-5B launch vehicle is a new-generation large launch vehicle specially developed for the construction of China’s space station under its manned space program,and it has the largest launching capacity to low Eart...The LM-5B launch vehicle is a new-generation large launch vehicle specially developed for the construction of China’s space station under its manned space program,and it has the largest launching capacity to low Earth orbit in China.The LM-5B booster is the largest booster ever built in China,which can produce 90%of the total thrust at liftoff,which laid a solid foundation for the successful development of the LM-5B launch vehicle.The booster team has overcome many technical challenges and gained rich experience in developing large cryogenic launch vehicles.展开更多
Improving the specific,technical,economic,and environmental characteristics of piston engines(ICE)operating on alternative gaseous fuels is a pressing task for the energy and mechanical engineering industries.The aim ...Improving the specific,technical,economic,and environmental characteristics of piston engines(ICE)operating on alternative gaseous fuels is a pressing task for the energy and mechanical engineering industries.The aim of the study was to optimize the parameters of the ICE working cycle after replacing the base fuel(propane-butane blend)with syngas from wood sawdust to improve its technical and economic performance based on mathematical modeling.The modeling results were verified through experimental studies(differences for key parameters did not exceed 4.0%).The object of the study was an electric generator based on a single-cylinder spark ignition engine with a power of 1 kW.The article describes the main approaches to creating a mathematical model of the engine working cycle,a test bench for modeling verification,physicochemical properties of the base fuel(propane-butane blend),and laboratory syngas.It was shown that replacing the fuel from a propane-butane blend to laboratory syngas caused a decrease in engine efficiency to 33%(the efficiency of the base ICE was 0.179 vs.the efficiency of 0.119 for the converted ICE for the 0.59 kW power mode).Engine efficiency was chosen as the key criterion for optimizing the working cycle.As a result of optimization,the efficiency of the converted syngas engine was 6.1%higher than that of the base engine running on the propane-butane blend,and the power drop did not exceed 8.0%.Thus,careful fine-tuning of the working cycle parameters allows increasing the technical and economic characteristics of the syngas engine to the level of ICEs running on traditional types of fuel.展开更多
基金Supported by Natural Science Basic Research Plan in Shaanxi Province of China (SJ08E206)
文摘In order to construct objective relatively mapping relationship model between customer requirements and product technical characteristics, a novel approach based on customer satisfactions information digging from case products and satisfaction information of expert technical characteristics was put forward in this paper. Technical characteristics evaluation values were expressed by rough number, and technical characteristics target sequence was determined on the basis of efficiency, cost type and middle type in this method. Use each calculated satisfactions of customers and technical characteristics as input and output elements to construct BP network model. And we use MATLAB software to simulate this BP network model based on the case of electric bicycles.
文摘Insight is here provided into the socio-economic and technical characteristics of cattle production in the Ndé Division (West Cameroon region). Using a semi-structured questionnaire, information on the activity was assessed following onsite visits and interviewing breeders. Through a random sampling scheme, 110 breeders in the four subdivisions of the Ndé Division were shadowed. The majority (98.18%) of breeders were men aged 20 to 40 and married (91.82%). They belong to the Mbororo ethnic group, having cumulated more than 10 years in the activity. Most respondents (50.91%) did not attend school and earn their living mainly from livestock (78.18%). Cattle were raised for sale and to feed the breeder’s family (77.27%). The main mode of acquisition of animals was through inheritance (81.82%). The cattle breeds were mostly made up of white Fulani (70%), living in private farms using a combination of stake and barbed wires (67.27%) as fences. The combination of natural fodder and cooking salt was used by most breeders (59.09%) as a daily ration. Reproduction was by natural mating (97.07%). Parasites (internal and external) and foot-and-mouth disease were the main diseases reported by the majority of farmers. Self-treatment (50%) was the main prophylactic measure taken by farmers in case of disease symptoms. Cattle herders faced several challenges, such as insufficient pasture (67.27%), agro-pastoral conflicts (76.36%) and diseases (90.91%). Cattle breeding was rather a widespread activity with no particular restriction.
文摘The technical characteristics of Sichuan folk furniture were studied from craft aesthetic perspective. The features of Sichuan folk furniture material, technology and structure were analyzed through literature review, field investigation and expert interview methods, the technical characteristics of Sichuan folk furniture were re-analyzed from craft aesthetic perspective rather than the traditional material and technique research perspectives. The study shows that Sichuan folk furniture technical features contain not only cultural spirit and aesthetic consciousness, but distinctive aesthetic personality as well. Sichuan folk furniture technical characteristics convey Chinese traditional design philosophy, such as theory is based on objects, and it is highly concentrated and concise of aesthetic sentiment in Sichuan folk aesthetic temperament and interest.
基金Supported by Natural Science Foundation(70971017)
文摘Determining the importance ratings of technical characteristics is a typical group decision-making process. The linguistic-based approach can effectively manage the imprecise and multi-granularity information i;n quality function deployment and facilitate decision-making in deriving the importance ratings. Based on the linguistic weighted averaging （LWA） operator and the linguistic hybrid averaging （LHA） operator, a practical approach is proposed to first aggregate the individual judgments into a collective value for each technical characteristic under linguistic environment, and then measure the deviation degree of linguistic variables to obtain the importance ratings of technical characteristics. A case study shows the application of the proposed method.
文摘With the continuous development of social economy and the continuous improvement of people's quality of life, the demand for oil is increasing. There are many places where oil is used in people's lives, such as cars and other means of transportation. Oil not only plays an important role in people's way of life and travel, but also plays an important role in many other aspects. Therefore, in order to ensure that people's daily life can be carried out in a normal and orderly way, it is necessary to develop the oilfield geology. Only in this way can more oil be mined to ensure people's daily needs. However, in the actual process of oil exploitation, it is difficult to guarantee people's demand simply by manpower. Therefore, in the process of exploiting the oilfield geology, the corresponding development technology should be used to exploit the oilfield, which will effectively improve the efficiency of oilfield exploitation. However, at present, there are still many problems in using oilfield geological development technology, such as the difficulty of exploitation, the benefit of exploitation, the equipment used in oil exploitation, and so on, which will affect the use of oilfield address development technology. Therefore, in order to exploit the oilfield geology smoothly, it is necessary for the relevant enterprises and managers to conduct a comprehensive investigation and understanding of the oilfield geology before exploiting the oil, and to find professional exploiters to design corresponding and perfect countermeasures for the exploitation of the oilfield geology. This can not only ensure the smooth geological exploitation process of the oilfield, but also ensure the economic benefits of related oilfield enterprises. Therefore, the following content is to analyze and study the technical characteristics and development countermeasures of oilfield geological development.
文摘The LM-5B launch vehicle is a new-generation large launch vehicle specially developed for the construction of China’s space station under its manned space program,and it has the largest launching capacity to low Earth orbit in China.The LM-5B booster is the largest booster ever built in China,which can produce 90%of the total thrust at liftoff,which laid a solid foundation for the successful development of the LM-5B launch vehicle.The booster team has overcome many technical challenges and gained rich experience in developing large cryogenic launch vehicles.
基金the Ministry of Science and Higher Education of the Russian Federation(Ural Federal University Program of Development within the Priority-2030 Program)is gratefully acknowledged.
文摘Improving the specific,technical,economic,and environmental characteristics of piston engines(ICE)operating on alternative gaseous fuels is a pressing task for the energy and mechanical engineering industries.The aim of the study was to optimize the parameters of the ICE working cycle after replacing the base fuel(propane-butane blend)with syngas from wood sawdust to improve its technical and economic performance based on mathematical modeling.The modeling results were verified through experimental studies(differences for key parameters did not exceed 4.0%).The object of the study was an electric generator based on a single-cylinder spark ignition engine with a power of 1 kW.The article describes the main approaches to creating a mathematical model of the engine working cycle,a test bench for modeling verification,physicochemical properties of the base fuel(propane-butane blend),and laboratory syngas.It was shown that replacing the fuel from a propane-butane blend to laboratory syngas caused a decrease in engine efficiency to 33%(the efficiency of the base ICE was 0.179 vs.the efficiency of 0.119 for the converted ICE for the 0.59 kW power mode).Engine efficiency was chosen as the key criterion for optimizing the working cycle.As a result of optimization,the efficiency of the converted syngas engine was 6.1%higher than that of the base engine running on the propane-butane blend,and the power drop did not exceed 8.0%.Thus,careful fine-tuning of the working cycle parameters allows increasing the technical and economic characteristics of the syngas engine to the level of ICEs running on traditional types of fuel.
