Objective:This study was conducted to explore the relationships among sedentary behavior(SB),electronic product addiction(EPA),and depression(D)in adolescents during the COVID-19 epidemic.Methods:A total of 604 adoles...Objective:This study was conducted to explore the relationships among sedentary behavior(SB),electronic product addiction(EPA),and depression(D)in adolescents during the COVID-19 epidemic.Methods:A total of 604 adolescents(including 309 girls and 295 boys aged 12-18)were selected from Qufu City,Shandong Province,China for three rounds of investigation.The model was constructed using AMOS 23.0 software,and cross-lagged analysis was conducted.Results:SB at T1 can significantly positively predict SB and EPA at T2(p<0.05).EPA at T1 can significantly positively predict SB and D at T2(p<0.05).Physical activity level and SB at T2 can significantly predict SB and EPA at T3(p<0.05).EPA at T2 can significantly predict SB,EPA,and D at T3(p<0.05).Conclusions:SB and EPA are predictive factors for D.Moreover,SB can significantly positively predict D and indirectly predict D through the mediating effect of EPA.展开更多
Use of multidisciplinary analysis in reliabilitybased design optimization(RBDO) results in the emergence of the important method of reliability-based multidisciplinary design optimization(RBMDO). To enhance the effici...Use of multidisciplinary analysis in reliabilitybased design optimization(RBDO) results in the emergence of the important method of reliability-based multidisciplinary design optimization(RBMDO). To enhance the efficiency and convergence of the overall solution process,a decoupling algorithm for RBMDO is proposed herein.Firstly, to decouple the multidisciplinary analysis using the individual disciplinary feasible(IDF) approach, the RBMDO is converted into a conventional form of RBDO. Secondly,the incremental shifting vector(ISV) strategy is adopted to decouple the nested optimization of RBDO into a sequential iteration process composed of design optimization and reliability analysis, thereby improving the efficiency significantly. Finally, the proposed RBMDO method is applied to the design of two actual electronic products: an aerial camera and a car pad. For these two applications, two RBMDO models are created, each containing several finite element models(FEMs) and relatively strong coupling between the involved disciplines. The computational results demonstrate the effectiveness of the proposed method.展开更多
Founded in May 1993, our company is mainly engaged in processing materials supplied by others with respect to mini electrical machinery, camera shutter, reflex shutter,
The Measures for the Administration of the Import of Mechanical and Electronic' Products co-formulated by the Ministry of Commerce,the General Administration of Customs and the General Administration of Quality Su...The Measures for the Administration of the Import of Mechanical and Electronic' Products co-formulated by the Ministry of Commerce,the General Administration of Customs and the General Administration of Quality Supervision,Inspection and Quarantine,was hereby promul- gated,which entered into force as of May 1,2008.展开更多
Portable electronic products are susceptible to accidental drop impact which can cause various functional and physical damage. This paper first presents a patent pending drop tester which allows portable electronic pr...Portable electronic products are susceptible to accidental drop impact which can cause various functional and physical damage. This paper first presents a patent pending drop tester which allows portable electronic products free drop at any orientation and drop height, and then introduces the drop tester experiment setup and its design principle. Using a cellular phone as an experiment object, we obtain some data such as the impact forces, the impact accelerations, and the strain of an interested spot. By analyzing experiment data the influence of impact to products in various states is investigated with the aim to provide help for the design of products and improvement of reliability.展开更多
With the appearance of a huge number of reusable electronic products,the precise value evaluation has become an urgent problem to be solved in the recycling process.Traditional methods rely on manual intervention most...With the appearance of a huge number of reusable electronic products,the precise value evaluation has become an urgent problem to be solved in the recycling process.Traditional methods rely on manual intervention mostly.In order to make the model more suitable for the dynamic updating,this paper proposes the reinforcement learning based electronic products value prediction model which integrates market information to achieve timely and stable prediction results.The basic attributes and depreciation attributes of the product are modeled by two parallel neural networks separately to learn the different effects for prediction.Most importantly,the double deep Q network is adopted to fuse market information by reinforcement learning strategy,and the training on the old product data can be used to predict the following appeared product,which alleviates the cold start problem.Experiments on the real mobile phone recycling platform data verify that the model has achieved higher accuracy and it has a better generalization ability.展开更多
In recent years, technical barriers to trade （TBT） are limiting the export of the mechanical and electronic products in China. Considering the practical export situation of China＇s mechanical and electronic product...In recent years, technical barriers to trade （TBT） are limiting the export of the mechanical and electronic products in China. Considering the practical export situation of China＇s mechanical and electronic products, we form the fuzzy matrix of factors influencing the export of mechanical and electronic products according to the concept of the triangular fuzzy number. Then we use fuzzy analytic hierarchy process （AHP） to analyze and rate all the factors. We also put forward suggestions on how to keep away and surpass the technical barriers to trade in Chinese mechanical and electronic enterprises.展开更多
It’s estimated that by the year 2000, the international electronics market will be worth US$ 2 trillion, making the electronics industry the world’s largest. How to expand its share of this international market will...It’s estimated that by the year 2000, the international electronics market will be worth US$ 2 trillion, making the electronics industry the world’s largest. How to expand its share of this international market will be a challenge for the China Electronics Import-Export Corporation. Recently, our reporter interviewed Mr. Ouyang Zhongmou, president of CEIEC. Question: How is your corporation getting on as China’s largest foreign展开更多
According to AQSIQ, it has made an effort to popularize the launching ofelectronic ''network for product quality supervision in the whole nation. China Product QualitySupervision Electronic Network is a nation...According to AQSIQ, it has made an effort to popularize the launching ofelectronic ''network for product quality supervision in the whole nation. China Product QualitySupervision Electronic Network is a nation-wide network, which employs modern informationtechnology, network technology and encoding technology to supervise enterprises'' products in anelectronic way. The new system labels digital information on all items of products that are includedin the network.展开更多
A robust digital receiver based on a matched filter （MF） is proposed for the radio frequency identification （RFID） reader system to enhance the reliability of signal processing in the electronic product code （EPC...A robust digital receiver based on a matched filter （MF） is proposed for the radio frequency identification （RFID） reader system to enhance the reliability of signal processing in the electronic product code （EPC） sensor network （ESN）. The performance of the proposed receiver is investigated by examining the anti-collision algorithm in the EPC global Class1 Generation2 protocol. The validity and usefulness are demonstrated by both computer simulations and experiments. Based on the verification results, comparing with the conventional zero crossing detector （ZCD） based receiver, the proposed receiver is very robust against strong amplitude distortions and considerable frequency deviations happening on the backscattered signal from a passive tag.展开更多
In the light of current fast development of new and expanded copper foil projects of electronic copper foil enterprises and recent adjustment of the main copper foil categories set to be developed by some companies(ge...In the light of current fast development of new and expanded copper foil projects of electronic copper foil enterprises and recent adjustment of the main copper foil categories set to be developed by some companies(generally from lithium foil to PCB foil).The secretariat of China Electronics Materials Industry Association e-copper foil branch conducted in March,2017 an extensive and in-depth展开更多
基金supported by Youth Fund of Humanities and Social Sciences Research Project of Education Ministry(22YJC890025).
文摘Objective:This study was conducted to explore the relationships among sedentary behavior(SB),electronic product addiction(EPA),and depression(D)in adolescents during the COVID-19 epidemic.Methods:A total of 604 adolescents(including 309 girls and 295 boys aged 12-18)were selected from Qufu City,Shandong Province,China for three rounds of investigation.The model was constructed using AMOS 23.0 software,and cross-lagged analysis was conducted.Results:SB at T1 can significantly positively predict SB and EPA at T2(p<0.05).EPA at T1 can significantly positively predict SB and D at T2(p<0.05).Physical activity level and SB at T2 can significantly predict SB and EPA at T3(p<0.05).EPA at T2 can significantly predict SB,EPA,and D at T3(p<0.05).Conclusions:SB and EPA are predictive factors for D.Moreover,SB can significantly positively predict D and indirectly predict D through the mediating effect of EPA.
基金supported by the Major Program of the National Natural Science Foundation of China (Grant 51490662)the Funds for Distinguished Young Scientists of Hunan Province (Grant 14JJ1016)+1 种基金the State Key Program of the National Science Foundation of China (11232004)the Heavy-duty Tractor Intelligent Manufacturing Technology Research and System Development (Grant 2016YFD0701105)
文摘Use of multidisciplinary analysis in reliabilitybased design optimization(RBDO) results in the emergence of the important method of reliability-based multidisciplinary design optimization(RBMDO). To enhance the efficiency and convergence of the overall solution process,a decoupling algorithm for RBMDO is proposed herein.Firstly, to decouple the multidisciplinary analysis using the individual disciplinary feasible(IDF) approach, the RBMDO is converted into a conventional form of RBDO. Secondly,the incremental shifting vector(ISV) strategy is adopted to decouple the nested optimization of RBDO into a sequential iteration process composed of design optimization and reliability analysis, thereby improving the efficiency significantly. Finally, the proposed RBMDO method is applied to the design of two actual electronic products: an aerial camera and a car pad. For these two applications, two RBMDO models are created, each containing several finite element models(FEMs) and relatively strong coupling between the involved disciplines. The computational results demonstrate the effectiveness of the proposed method.
文摘Founded in May 1993, our company is mainly engaged in processing materials supplied by others with respect to mini electrical machinery, camera shutter, reflex shutter,
文摘The Measures for the Administration of the Import of Mechanical and Electronic' Products co-formulated by the Ministry of Commerce,the General Administration of Customs and the General Administration of Quality Supervision,Inspection and Quarantine,was hereby promul- gated,which entered into force as of May 1,2008.
基金This paper is supported by the 863 Project in China under Contract No2002AA404430
文摘Portable electronic products are susceptible to accidental drop impact which can cause various functional and physical damage. This paper first presents a patent pending drop tester which allows portable electronic products free drop at any orientation and drop height, and then introduces the drop tester experiment setup and its design principle. Using a cellular phone as an experiment object, we obtain some data such as the impact forces, the impact accelerations, and the strain of an interested spot. By analyzing experiment data the influence of impact to products in various states is investigated with the aim to provide help for the design of products and improvement of reliability.
基金supported by the National Key R&D Program of China(Grant Nos.2018YFC1900804 and 2019YFC1906002)。
文摘With the appearance of a huge number of reusable electronic products,the precise value evaluation has become an urgent problem to be solved in the recycling process.Traditional methods rely on manual intervention mostly.In order to make the model more suitable for the dynamic updating,this paper proposes the reinforcement learning based electronic products value prediction model which integrates market information to achieve timely and stable prediction results.The basic attributes and depreciation attributes of the product are modeled by two parallel neural networks separately to learn the different effects for prediction.Most importantly,the double deep Q network is adopted to fuse market information by reinforcement learning strategy,and the training on the old product data can be used to predict the following appeared product,which alleviates the cold start problem.Experiments on the real mobile phone recycling platform data verify that the model has achieved higher accuracy and it has a better generalization ability.
文摘In recent years, technical barriers to trade （TBT） are limiting the export of the mechanical and electronic products in China. Considering the practical export situation of China＇s mechanical and electronic products, we form the fuzzy matrix of factors influencing the export of mechanical and electronic products according to the concept of the triangular fuzzy number. Then we use fuzzy analytic hierarchy process （AHP） to analyze and rate all the factors. We also put forward suggestions on how to keep away and surpass the technical barriers to trade in Chinese mechanical and electronic enterprises.
文摘It’s estimated that by the year 2000, the international electronics market will be worth US$ 2 trillion, making the electronics industry the world’s largest. How to expand its share of this international market will be a challenge for the China Electronics Import-Export Corporation. Recently, our reporter interviewed Mr. Ouyang Zhongmou, president of CEIEC. Question: How is your corporation getting on as China’s largest foreign
文摘According to AQSIQ, it has made an effort to popularize the launching ofelectronic ''network for product quality supervision in the whole nation. China Product QualitySupervision Electronic Network is a nation-wide network, which employs modern informationtechnology, network technology and encoding technology to supervise enterprises'' products in anelectronic way. The new system labels digital information on all items of products that are includedin the network.
基金supported by the Korea Evaluation Institute of Industrial Technology(KEIT),under the R&D Support Program of Ministry of Knowledge Economy,Korea
文摘A robust digital receiver based on a matched filter （MF） is proposed for the radio frequency identification （RFID） reader system to enhance the reliability of signal processing in the electronic product code （EPC） sensor network （ESN）. The performance of the proposed receiver is investigated by examining the anti-collision algorithm in the EPC global Class1 Generation2 protocol. The validity and usefulness are demonstrated by both computer simulations and experiments. Based on the verification results, comparing with the conventional zero crossing detector （ZCD） based receiver, the proposed receiver is very robust against strong amplitude distortions and considerable frequency deviations happening on the backscattered signal from a passive tag.
文摘In the light of current fast development of new and expanded copper foil projects of electronic copper foil enterprises and recent adjustment of the main copper foil categories set to be developed by some companies(generally from lithium foil to PCB foil).The secretariat of China Electronics Materials Industry Association e-copper foil branch conducted in March,2017 an extensive and in-depth
