Presented is design concept for key parameters o f the reverse conducting gate commutated thyristor (RC-GCT),such as the thickness and concentration of n-base region and the transparent anode region,and the wi dth o...Presented is design concept for key parameters o f the reverse conducting gate commutated thyristor (RC-GCT),such as the thickness and concentration of n-base region and the transparent anode region,and the wi dth of separation region between asymmetric GCT and PIN diode.A structure model of the RC-GCT is set up based on the design concept and its characteristics are analyzed.The simulation results show the design concept is reasonable.展开更多
Lushan-Poyang Lake Eco-civilization is the joint product of natural process and regional characteristics in the evolution of history, the formation factors and status of Lushan-Poyang Lake eco-civilization were clarif...Lushan-Poyang Lake Eco-civilization is the joint product of natural process and regional characteristics in the evolution of history, the formation factors and status of Lushan-Poyang Lake eco-civilization were clarified by understanding its natural geographical foundation, regional culture foundation, environmental philosophy foundation and production practice foundation, to provide theoretical support for the future construction of Lushan-Poyang Lake eco-civilization.展开更多
AIM： To observe the effect of acupuncture at Foot- Yangming Meridian on gastric mucosal blood flow （GMBF）, gastric motility and brain-gut peptide. METHODS： Sixty SD rats were randomly divided into 6 groups： norma...AIM： To observe the effect of acupuncture at Foot- Yangming Meridian on gastric mucosal blood flow （GMBF）, gastric motility and brain-gut peptide. METHODS： Sixty SD rats were randomly divided into 6 groups： normal control group, model group （group with gastric mucosal damage, GMD）, Sibai group （with acupuncture at Sibai point ＋ GMD）, Tianshu group （with acupuncture at Tianshu point ＋ GMD）, Zusanli group （with acupuncture at Zusanli point ＋ GMD） and non-acupoint group （with acupuncture at non-acupoint ＋ GMD）. The GMD model group was induced by infusing pure alcohol into gastric cavity. H2 Gas Clearance Test （HGCT） was used to measure GMBF, the frequency and amplitude of gastric motility were measured by the method of aerocyst, the content of brain-gut peptide in sinus ventriculi and bulbus medullae were detected by radioimmunoassay. RESULTS： Inhibitory effect of the frequency and amplitude of gastric motility were shown in model group, and the rates of frequency and amplitude changes were remarkably different from the normal control group （-19.41 ± 17.21 vs-4.71 ± 10.32, P 〈 0.05; -51.61 ± 29.02 vs 1.81 ± 14.12, P 〈 0.01）. In comparison with control group, the GMBF was 0.52 ± 0.161 mL vs 1.03 ± 0.255 mL per 100g tissue/min, P 〈 0.01, the content of motilin in sinus ventriculi and bulbus medullae was 63.04 ± 7.77 pg/mL vs 72.91 ± 8.42 pg/mL, P 〈 0.05 and 50.96 ± 8.77 pg/mL vs 60.76 ± 8.05 pg/mL, P 〈 0.05, but the content of somatostatin in sinus ventriculi and bulbus medullae was 179.85 ± 43.13 ng/g vs 90.54 ± 40.42 ng/g, P 〈 0.01 and 532.86 ± 122.58 ng/g vs 370.91 ± 76.29 ng/g, P 〈 0.05,respectively. In comparison with model group, the amplitude of gastric motility was 1.52 ± 20.13, -6.52 ± 23.31, 6.92 ± 25.21 vs -51.61 ± 29.02, P 〈 0.01 and GMBF was 0.694 ± 0.160 mL vs 0.893 ± 0.210 mL, 1.038 ± 0.301 mL vs 0.52 ± 0.161 mL per 100g tissue/rain, P 〈 0.01, respectively in Tianshu, Sibai and Zusanli groups, the content of motilin in sinus ventriculi and bulbus medullae was 71.64 ± 9.35 pg/mL vs 63.04 ± 7.77 pg/mL, P 〈 0.05; 58.96 ± 6.69 pg/mL vs 50.96 ± 8.77 pg/mL, P 〈 0.05 in Zusanli group and 72.84 ± 8.62 pg/mL vs 63.04 ± 7.77 pg/mL, P 〈 0.05 in Sibai group, while the content of somatostatin in bulbus medullae in Tianshu, Sibai and Zusanli groups was 480.62 ± 151.69 ng/g, 388.53 ± 155.04 ng/g, 365.76 ± 143.93 ng/g vs 532.86 ± 122.58 ng/g, P 〈 0.05, respectively. CONCLUSION： Electro-acupuncture at acupoints of Foot-Yangming Meridian could enhance the gastric motility, improve GMBF, and regulate the content of motUin and somatostatin in sinus ventriculi and bulbus. The effects of acupuncture on GMBF and gastric motility may be related to the content of brain-gut peptide.展开更多
Solar energy is the radiant light and heat from the Sun that has been harnessed by human since ancient times. Also secondary solar resources such as wind and wave power, hydroelectric power and biomass account for mos...Solar energy is the radiant light and heat from the Sun that has been harnessed by human since ancient times. Also secondary solar resources such as wind and wave power, hydroelectric power and biomass account for most of the available renewable energy on Earth, which can be used by human. Architects since alacient times have used various methods to hamesse and employ the solar energy for lighting, cooling and heating and etc. Meanwhile, Iran＇s ancient architecture, as an adaptive one, which consists of various climatic reigns, is filled with abounding examples of using sun energy in buildings. But, unfortunately despite these ancient methods, our modern architects mostly tend to provide energy of buildings with fossil fuels. This increases energy costs of the building＇s and also pollutes the environment. In this article it is intended to consider the ancient ways of using solar energy in Iran, and then suggest new methods for applying in modem buildings. The results of consideration show that among Solar technologies, passive and active methods, Iran＇s ancient architects have used passive methods, for example in mass and space, orientation and settlement of building. The idea of passive methods can be used in new shapes in current buildings, for instance by using solar space, central yard and etc. The suggestive method in this paper is combining the passive methods with the active ones.展开更多
Located in central Africa, Cameroon offers a wealth of solar power opportunity. The public lighting in the capital city Yaounde is an example of solar energy promotion. The purpose of this paper is among other things ...Located in central Africa, Cameroon offers a wealth of solar power opportunity. The public lighting in the capital city Yaounde is an example of solar energy promotion. The purpose of this paper is among other things aiming at assessing the solar energy resources of central Africa and making sure it can be used optimally at least for public lighting. Based on the knowledge from data collected and field experience for three years, the authors will assess the implementation of the technology and show how the use of solar energy can solve some problems in the city of Yaounde even when the area is grid connected. This paper will also identify actions for improved access to sustainable, friendly, affordable solar energy services to users, as well as a significant improvement of energy infrastructure and energy efficiency in the city. The authors will also address issues on identified obstacles for the promotion of solar energy in order to help the cities in sub Saharan countries to develop a vision aiming at developing good solar energy policy and better contribute to fight against poverty and climate change.展开更多
文摘Presented is design concept for key parameters o f the reverse conducting gate commutated thyristor (RC-GCT),such as the thickness and concentration of n-base region and the transparent anode region,and the wi dth of separation region between asymmetric GCT and PIN diode.A structure model of the RC-GCT is set up based on the design concept and its characteristics are analyzed.The simulation results show the design concept is reasonable.
基金Supported by Bid-inviting Project in the Key Humanities Base of Jiangxi Provincial Universities and Colleges~~
文摘Lushan-Poyang Lake Eco-civilization is the joint product of natural process and regional characteristics in the evolution of history, the formation factors and status of Lushan-Poyang Lake eco-civilization were clarified by understanding its natural geographical foundation, regional culture foundation, environmental philosophy foundation and production practice foundation, to provide theoretical support for the future construction of Lushan-Poyang Lake eco-civilization.
基金Supported by the Major State Basic Research Development Program of China (973 program), No. 2005-CB523306-9
文摘AIM： To observe the effect of acupuncture at Foot- Yangming Meridian on gastric mucosal blood flow （GMBF）, gastric motility and brain-gut peptide. METHODS： Sixty SD rats were randomly divided into 6 groups： normal control group, model group （group with gastric mucosal damage, GMD）, Sibai group （with acupuncture at Sibai point ＋ GMD）, Tianshu group （with acupuncture at Tianshu point ＋ GMD）, Zusanli group （with acupuncture at Zusanli point ＋ GMD） and non-acupoint group （with acupuncture at non-acupoint ＋ GMD）. The GMD model group was induced by infusing pure alcohol into gastric cavity. H2 Gas Clearance Test （HGCT） was used to measure GMBF, the frequency and amplitude of gastric motility were measured by the method of aerocyst, the content of brain-gut peptide in sinus ventriculi and bulbus medullae were detected by radioimmunoassay. RESULTS： Inhibitory effect of the frequency and amplitude of gastric motility were shown in model group, and the rates of frequency and amplitude changes were remarkably different from the normal control group （-19.41 ± 17.21 vs-4.71 ± 10.32, P 〈 0.05; -51.61 ± 29.02 vs 1.81 ± 14.12, P 〈 0.01）. In comparison with control group, the GMBF was 0.52 ± 0.161 mL vs 1.03 ± 0.255 mL per 100g tissue/min, P 〈 0.01, the content of motilin in sinus ventriculi and bulbus medullae was 63.04 ± 7.77 pg/mL vs 72.91 ± 8.42 pg/mL, P 〈 0.05 and 50.96 ± 8.77 pg/mL vs 60.76 ± 8.05 pg/mL, P 〈 0.05, but the content of somatostatin in sinus ventriculi and bulbus medullae was 179.85 ± 43.13 ng/g vs 90.54 ± 40.42 ng/g, P 〈 0.01 and 532.86 ± 122.58 ng/g vs 370.91 ± 76.29 ng/g, P 〈 0.05,respectively. In comparison with model group, the amplitude of gastric motility was 1.52 ± 20.13, -6.52 ± 23.31, 6.92 ± 25.21 vs -51.61 ± 29.02, P 〈 0.01 and GMBF was 0.694 ± 0.160 mL vs 0.893 ± 0.210 mL, 1.038 ± 0.301 mL vs 0.52 ± 0.161 mL per 100g tissue/rain, P 〈 0.01, respectively in Tianshu, Sibai and Zusanli groups, the content of motilin in sinus ventriculi and bulbus medullae was 71.64 ± 9.35 pg/mL vs 63.04 ± 7.77 pg/mL, P 〈 0.05; 58.96 ± 6.69 pg/mL vs 50.96 ± 8.77 pg/mL, P 〈 0.05 in Zusanli group and 72.84 ± 8.62 pg/mL vs 63.04 ± 7.77 pg/mL, P 〈 0.05 in Sibai group, while the content of somatostatin in bulbus medullae in Tianshu, Sibai and Zusanli groups was 480.62 ± 151.69 ng/g, 388.53 ± 155.04 ng/g, 365.76 ± 143.93 ng/g vs 532.86 ± 122.58 ng/g, P 〈 0.05, respectively. CONCLUSION： Electro-acupuncture at acupoints of Foot-Yangming Meridian could enhance the gastric motility, improve GMBF, and regulate the content of motUin and somatostatin in sinus ventriculi and bulbus. The effects of acupuncture on GMBF and gastric motility may be related to the content of brain-gut peptide.
文摘Solar energy is the radiant light and heat from the Sun that has been harnessed by human since ancient times. Also secondary solar resources such as wind and wave power, hydroelectric power and biomass account for most of the available renewable energy on Earth, which can be used by human. Architects since alacient times have used various methods to hamesse and employ the solar energy for lighting, cooling and heating and etc. Meanwhile, Iran＇s ancient architecture, as an adaptive one, which consists of various climatic reigns, is filled with abounding examples of using sun energy in buildings. But, unfortunately despite these ancient methods, our modern architects mostly tend to provide energy of buildings with fossil fuels. This increases energy costs of the building＇s and also pollutes the environment. In this article it is intended to consider the ancient ways of using solar energy in Iran, and then suggest new methods for applying in modem buildings. The results of consideration show that among Solar technologies, passive and active methods, Iran＇s ancient architects have used passive methods, for example in mass and space, orientation and settlement of building. The idea of passive methods can be used in new shapes in current buildings, for instance by using solar space, central yard and etc. The suggestive method in this paper is combining the passive methods with the active ones.
文摘Located in central Africa, Cameroon offers a wealth of solar power opportunity. The public lighting in the capital city Yaounde is an example of solar energy promotion. The purpose of this paper is among other things aiming at assessing the solar energy resources of central Africa and making sure it can be used optimally at least for public lighting. Based on the knowledge from data collected and field experience for three years, the authors will assess the implementation of the technology and show how the use of solar energy can solve some problems in the city of Yaounde even when the area is grid connected. This paper will also identify actions for improved access to sustainable, friendly, affordable solar energy services to users, as well as a significant improvement of energy infrastructure and energy efficiency in the city. The authors will also address issues on identified obstacles for the promotion of solar energy in order to help the cities in sub Saharan countries to develop a vision aiming at developing good solar energy policy and better contribute to fight against poverty and climate change.
