A DC-10Mb/s laser diode driver,compatible with TTL and CMOS levels,is presented. The optical power corresponding to‘1＇ and ‘0＇ can be set independently with resistors off-chip and stabilized with a closed loop. A ...A DC-10Mb/s laser diode driver,compatible with TTL and CMOS levels,is presented. The optical power corresponding to‘1＇ and ‘0＇ can be set independently with resistors off-chip and stabilized with a closed loop. A novel peak-to- peak optical power monitor and stabilization mechanism is introduced. The circuit, fabricated in a CSMC 0. 5μm mixed signal CMOS process, can provide 120mA maximum drive current and 0. 6dB extinction ration fluctuation over - 20 ＋ 80℃ ,which is independent of input pattern.展开更多
With proliferation of electric appliances, residential electricity consumption, in particular the air conditioning load becomes more and more important and shares higher and higher percentage in total consumption in l...With proliferation of electric appliances, residential electricity consumption, in particular the air conditioning load becomes more and more important and shares higher and higher percentage in total consumption in large cities like Shanghai. The paper reports in detail the survey on characteristics of residential electric consumption, in particular the air conditioning consumption. To optimize power system operation and expand power market, the paper concludes that power industry must learn to investigate, open up and adapt itself to power market economy.展开更多
This paper is concerned with the design and application of coaxial mixers with the aid of analysis of interaction between each individual impeller. Two types of coaxial mixers pitched blade turbine(PBT)-helical ribbon...This paper is concerned with the design and application of coaxial mixers with the aid of analysis of interaction between each individual impeller. Two types of coaxial mixers pitched blade turbine(PBT)-helical ribbon(HR)and inner-outer HR operated in laminar regime were studied experimentally and numerically. The interaction implies synergistic and interference effects, which was revealed through the investigation of axial circulation rate, energy dissipation rate and power consumption. The influence factors including rotational speed ratio,rotating mode and impeller configuration were explored systematically. Quantitative analysis of power consumption involves three parameters: rate of variation in power consumption, interactive mode and ratio of power consumption. Analysis indicated that some important properties were embodied in the power curve.These properties are one-way and two-way interactions, critical speed ratio and dominant impeller. Finally, a new suggestion for power estimation was given.展开更多
An upsurge of interest in relay-augmented infrastructure-based networks has appeared in recent years.Radio resource management in such relay systems has great influence on the system performance.How to utilize the lim...An upsurge of interest in relay-augmented infrastructure-based networks has appeared in recent years.Radio resource management in such relay systems has great influence on the system performance.How to utilize the limited frequency resources efficiently in the system is a hot research topic.In this paper,performance of frequency reuse schemes has been studied in fixed relay systems.A novel scheme is achieved by modifying an existing one.Theoretical model is proposed for the performance analysis of two schemes.Both the theoretical analysis and simulation results show that the modified scheme outperforms the existing one not only in power consumption of mobile stations but also in cell carrier-to-interference ratio coverage.展开更多
The innovation of technologzv and the improvement of people＇s living standard accelerate the replacement of consumer electronic appliances, resulting in a significant increase of waste household electronic appliances...The innovation of technologzv and the improvement of people＇s living standard accelerate the replacement of consumer electronic appliances, resulting in a significant increase of waste household electronic appliances （WHEA）. To address the environmental problems of WHEA, many countries have enacted legislation according to WHEA management, including collecting, processing and recycling. The regulations on the management of WHEA were also drafted in China and pilot programs of WHEA recycling management encountered difficulties in collecting WHEA. The success of a recycling scheme is dependent on people＇s willingness of participating in the scheme, This paper applies Ajzen＇s theory of planned behavior to seek the main factors to engourage consumers to participate in WHEA recycling management in China. Data from a survey conducted with a sample of 633 consumers show that service motivation is the first predictor of participation behavior intention, followed by environmental behavior attitude, economic motivation, subjective norm. and perceived behavior barrier. Environmental knowledge is found not to be the predictor of behavior intention in this recycling scheme. Study results also suggest that publicity is the key situational factor in the WHEA recycling management. Recycling network and policy have little influence on changing consumers＇ current behavior intention and participation. Implications of the findings are discussed and future research directions are suggested in the end.展开更多
The research goal is to develop a new solar water heater system(SWHS) that uses a solar bubble pump instead of an electric pump.The pump is powered by the steam produced from an evacuated tube collector.Therefore,heat...The research goal is to develop a new solar water heater system(SWHS) that uses a solar bubble pump instead of an electric pump.The pump is powered by the steam produced from an evacuated tube collector.Therefore,heat could be transferred downward from the collector to a hot water storage tank.The designed system consists of two sets of heat-pipe evacuated tube collectors,a solar bubble pump installed at an upper level and a water storage tank with a heat exchanger at a lower level.Discharge heads of 1 and 5 m were tested.The bubble pump could operate at the collector temperature of about 90-100 ℃ and vapor gage pressure of 80-90 kPa.It is found that water circulation within the SWHS depends on the incident solar intensity and system discharge head.Experimental investigations are conducted to obtain the system thermal efficiencies from the hourly,daily and long-term performance tests.The thermal performance of the proposed system is compared with conventional solar water heaters.The results show that the proposed system achieves system characteristic efficiency of 10% higher than that of the conventional systems using electric pump if taking the consumption of electric power into account.And the former is a zero carbon system.展开更多
Cloud home network industry is a field concerning consumer electronics, information, communications, architecture and other industries, and has now become a digitalized and networked trend for consumer electronics. Th...Cloud home network industry is a field concerning consumer electronics, information, communications, architecture and other industries, and has now become a digitalized and networked trend for consumer electronics. This paper analyzes and studies the current status of cloud home from the perspective of the potential drives and problems in the development of cloud home industry, etc.展开更多
Self-powered chaos signal generator is potentially useful in future medical system,such as low cost portable human healthy monitor and treatment without external power source.For both functional and power unit,the pow...Self-powered chaos signal generator is potentially useful in future medical system,such as low cost portable human healthy monitor and treatment without external power source.For both functional and power unit,the power level of electric energy generator and consumption is a key factor for self-powered system.In this paper,we have investigated the power consumption of three typical output modes of a simple chaos circuit.Analytical analysis for power consumption of fixed output mode is obtained for evaluating the power characteristics of chaos signal generator.Numerical calculations are given for predicting the power characteristics of periodical and chaotic output modes.This study is important for not only understanding the power consumption of chaos signal generator,but also guiding new self-powered chaos signal generator design.展开更多
Objective To observe the clinical efficacy of acupuncture and moxibustion for functional dyspepsia(FD)due to Yang deficiency of the spleen and stomach.Methods A total of 90 patients meeting the inclusion criteria of F...Objective To observe the clinical efficacy of acupuncture and moxibustion for functional dyspepsia(FD)due to Yang deficiency of the spleen and stomach.Methods A total of 90 patients meeting the inclusion criteria of FD due to Yang deficiency of the spleen and stomach were randomized into an acupuncture-moxibustion group,an electroacupuncture(EA)group,and a mosapride group by the random number table method,with 30 cases in each group.The mosapride group was treated with mosapride citrate dispersible tablets.The EA group was treated with EA treatment.The acupuncture-moxibustion group was treated with additional moxibustion therapy based on the treatment in the EA group.All three groups took 10 d as one treatment course and 2 courses in total,with a 2-day interval between two courses.The traditional Chinese medicine(TCM)symptoms score,functional digestive disorder quality of life questionnaire(FDDQL)score,oral-colon transit time(OCTT),and serum glucagon-like peptide-1(GLP-1)level was compared before and after treatment among the three groups.And the clinical efficacy was evaluated.Results The total effective rate in the acupuncture-moxibustion group was 96.7%,which was higher than 86.7%in the EA group and 73.3%in the mosapride group,and the total effective rate in the EA group was higher than that in the mosapride group;the inter-group differences were all statistically significant(P<0.05).After treatment,the TCM symptom score in the three groups was lower than that before treatment(P<0.05),and the FDDQL score was higher than that before treatment(P<0.05).The change after treatment in the TCM symptom score in the acupuncture-moxibustion group and the EA group was more significant than that in the mosapride group,and the change in the acupuncture-moxibustion group was more significant than that in the EA group;the inter-group differences were statistically significant(P<0.05).The change after treatment in the FDDQL score in the acupuncture-moxibustion group and the EA group was greater than that in the mosapride group,and the change in the acupuncture-moxibustion group was larger than that in the EA group;the inter-group differences were all statistically significant(P<0.05).After treatment,the OCTT in all three groups was lower than that before treatment(P<0.05),and the serum GLP-1 level was higher than that before treatment(P<0.05);the change after treatment in the OCTT in the acupuncture-moxibustion group and the EA group was more significant than that in the mosapride group,and the change in the acupuncture-moxibustion group was more significant than that in the EA group;the inter-group differences were statistically significant(P<0.05).The change after treatment in the serum GLP-1 level in the acupuncture-moxibustion group and the EA group was greater than that in the mosapride group,and the change in the acupuncture-moxibustion group was larger than that in the EA group;the inter-group differences were statistically significant(P<0.05).Conclusion Acupuncture and moxibustion can improve the clinical symptoms in patients with FD and enhance their quality of life,producing better effects than EA or mosapride alone.Shortening gastrointestinal movement time and increasing gastrointestinal hormone levels may be its mechanism.展开更多
文摘A DC-10Mb/s laser diode driver,compatible with TTL and CMOS levels,is presented. The optical power corresponding to‘1＇ and ‘0＇ can be set independently with resistors off-chip and stabilized with a closed loop. A novel peak-to- peak optical power monitor and stabilization mechanism is introduced. The circuit, fabricated in a CSMC 0. 5μm mixed signal CMOS process, can provide 120mA maximum drive current and 0. 6dB extinction ration fluctuation over - 20 ＋ 80℃ ,which is independent of input pattern.
文摘With proliferation of electric appliances, residential electricity consumption, in particular the air conditioning load becomes more and more important and shares higher and higher percentage in total consumption in large cities like Shanghai. The paper reports in detail the survey on characteristics of residential electric consumption, in particular the air conditioning consumption. To optimize power system operation and expand power market, the paper concludes that power industry must learn to investigate, open up and adapt itself to power market economy.
基金Supported by the Shanghai Institute of Technology(10120K146098)Shanghai Municipal Education Commission(1021ZK151009017)
文摘This paper is concerned with the design and application of coaxial mixers with the aid of analysis of interaction between each individual impeller. Two types of coaxial mixers pitched blade turbine(PBT)-helical ribbon(HR)and inner-outer HR operated in laminar regime were studied experimentally and numerically. The interaction implies synergistic and interference effects, which was revealed through the investigation of axial circulation rate, energy dissipation rate and power consumption. The influence factors including rotational speed ratio,rotating mode and impeller configuration were explored systematically. Quantitative analysis of power consumption involves three parameters: rate of variation in power consumption, interactive mode and ratio of power consumption. Analysis indicated that some important properties were embodied in the power curve.These properties are one-way and two-way interactions, critical speed ratio and dominant impeller. Finally, a new suggestion for power estimation was given.
基金National Science Fund for Creative Research Groups(No.60521002)Chinese NationalKey Technology R&D Program(No.2005BA908B02)Science Foundation ofShanghai Municipal Commission of Scienceand Technology,Chinese(No.05dz05802)
文摘An upsurge of interest in relay-augmented infrastructure-based networks has appeared in recent years.Radio resource management in such relay systems has great influence on the system performance.How to utilize the limited frequency resources efficiently in the system is a hot research topic.In this paper,performance of frequency reuse schemes has been studied in fixed relay systems.A novel scheme is achieved by modifying an existing one.Theoretical model is proposed for the performance analysis of two schemes.Both the theoretical analysis and simulation results show that the modified scheme outperforms the existing one not only in power consumption of mobile stations but also in cell carrier-to-interference ratio coverage.
文摘The innovation of technologzv and the improvement of people＇s living standard accelerate the replacement of consumer electronic appliances, resulting in a significant increase of waste household electronic appliances （WHEA）. To address the environmental problems of WHEA, many countries have enacted legislation according to WHEA management, including collecting, processing and recycling. The regulations on the management of WHEA were also drafted in China and pilot programs of WHEA recycling management encountered difficulties in collecting WHEA. The success of a recycling scheme is dependent on people＇s willingness of participating in the scheme, This paper applies Ajzen＇s theory of planned behavior to seek the main factors to engourage consumers to participate in WHEA recycling management in China. Data from a survey conducted with a sample of 633 consumers show that service motivation is the first predictor of participation behavior intention, followed by environmental behavior attitude, economic motivation, subjective norm. and perceived behavior barrier. Environmental knowledge is found not to be the predictor of behavior intention in this recycling scheme. Study results also suggest that publicity is the key situational factor in the WHEA recycling management. Recycling network and policy have little influence on changing consumers＇ current behavior intention and participation. Implications of the findings are discussed and future research directions are suggested in the end.
基金Project(2011-0021376) supported by Basic Science Program through the National Research Foundation (NRF) Funded by the Ministry of Education,Science and Technology of Korea
文摘The research goal is to develop a new solar water heater system(SWHS) that uses a solar bubble pump instead of an electric pump.The pump is powered by the steam produced from an evacuated tube collector.Therefore,heat could be transferred downward from the collector to a hot water storage tank.The designed system consists of two sets of heat-pipe evacuated tube collectors,a solar bubble pump installed at an upper level and a water storage tank with a heat exchanger at a lower level.Discharge heads of 1 and 5 m were tested.The bubble pump could operate at the collector temperature of about 90-100 ℃ and vapor gage pressure of 80-90 kPa.It is found that water circulation within the SWHS depends on the incident solar intensity and system discharge head.Experimental investigations are conducted to obtain the system thermal efficiencies from the hourly,daily and long-term performance tests.The thermal performance of the proposed system is compared with conventional solar water heaters.The results show that the proposed system achieves system characteristic efficiency of 10% higher than that of the conventional systems using electric pump if taking the consumption of electric power into account.And the former is a zero carbon system.
文摘Cloud home network industry is a field concerning consumer electronics, information, communications, architecture and other industries, and has now become a digitalized and networked trend for consumer electronics. This paper analyzes and studies the current status of cloud home from the perspective of the potential drives and problems in the development of cloud home industry, etc.
基金supported by the Fundamental Research Funds for the Central Universities(Grant No.lzujbky-2013-35)Beijing Municipal Commission of Science and Technology(Grant No.Z131100006013005)
文摘Self-powered chaos signal generator is potentially useful in future medical system,such as low cost portable human healthy monitor and treatment without external power source.For both functional and power unit,the power level of electric energy generator and consumption is a key factor for self-powered system.In this paper,we have investigated the power consumption of three typical output modes of a simple chaos circuit.Analytical analysis for power consumption of fixed output mode is obtained for evaluating the power characteristics of chaos signal generator.Numerical calculations are given for predicting the power characteristics of periodical and chaotic output modes.This study is important for not only understanding the power consumption of chaos signal generator,but also guiding new self-powered chaos signal generator design.
基金This work was supported by the Project of Hunan Provincial Natural Science Foundation of China(湖南省自然科学基金项目,No.2022JJ40301)Fund Project of Hunan Province Education Office(湖南省教育厅科学研究项目,No.21B0369)Scientific Fund Project of Hunan University of Chinese Medicine(湖南中医药大学科研基金项目,No.2021XJJJ013).
文摘Objective To observe the clinical efficacy of acupuncture and moxibustion for functional dyspepsia(FD)due to Yang deficiency of the spleen and stomach.Methods A total of 90 patients meeting the inclusion criteria of FD due to Yang deficiency of the spleen and stomach were randomized into an acupuncture-moxibustion group,an electroacupuncture(EA)group,and a mosapride group by the random number table method,with 30 cases in each group.The mosapride group was treated with mosapride citrate dispersible tablets.The EA group was treated with EA treatment.The acupuncture-moxibustion group was treated with additional moxibustion therapy based on the treatment in the EA group.All three groups took 10 d as one treatment course and 2 courses in total,with a 2-day interval between two courses.The traditional Chinese medicine(TCM)symptoms score,functional digestive disorder quality of life questionnaire(FDDQL)score,oral-colon transit time(OCTT),and serum glucagon-like peptide-1(GLP-1)level was compared before and after treatment among the three groups.And the clinical efficacy was evaluated.Results The total effective rate in the acupuncture-moxibustion group was 96.7%,which was higher than 86.7%in the EA group and 73.3%in the mosapride group,and the total effective rate in the EA group was higher than that in the mosapride group;the inter-group differences were all statistically significant(P<0.05).After treatment,the TCM symptom score in the three groups was lower than that before treatment(P<0.05),and the FDDQL score was higher than that before treatment(P<0.05).The change after treatment in the TCM symptom score in the acupuncture-moxibustion group and the EA group was more significant than that in the mosapride group,and the change in the acupuncture-moxibustion group was more significant than that in the EA group;the inter-group differences were statistically significant(P<0.05).The change after treatment in the FDDQL score in the acupuncture-moxibustion group and the EA group was greater than that in the mosapride group,and the change in the acupuncture-moxibustion group was larger than that in the EA group;the inter-group differences were all statistically significant(P<0.05).After treatment,the OCTT in all three groups was lower than that before treatment(P<0.05),and the serum GLP-1 level was higher than that before treatment(P<0.05);the change after treatment in the OCTT in the acupuncture-moxibustion group and the EA group was more significant than that in the mosapride group,and the change in the acupuncture-moxibustion group was more significant than that in the EA group;the inter-group differences were statistically significant(P<0.05).The change after treatment in the serum GLP-1 level in the acupuncture-moxibustion group and the EA group was greater than that in the mosapride group,and the change in the acupuncture-moxibustion group was larger than that in the EA group;the inter-group differences were statistically significant(P<0.05).Conclusion Acupuncture and moxibustion can improve the clinical symptoms in patients with FD and enhance their quality of life,producing better effects than EA or mosapride alone.Shortening gastrointestinal movement time and increasing gastrointestinal hormone levels may be its mechanism.
