The current temperature field model of mine gob does not take the boundary conditions of the atmospheric pressure into account, while the actual atmospheric pressure is influenced by weather, so as to produce differen...The current temperature field model of mine gob does not take the boundary conditions of the atmospheric pressure into account, while the actual atmospheric pressure is influenced by weather, so as to produce differences between ventilation negative pressure of the working face and the negative pressure of gas drainage in gob, thus interfering the calculated results of gob temperature field. According to the characteristics of the actual air flow and temperature change in gob, a two-dimensional temperature field model of the gob was built, and the relational model between the air pressure of intake and outlet of the gob and the atmospheric pressure was established, which was introduced into the boundary conditions of temperature field to conduct calculation. By means of analysis on the simulation example, and comparison with the traditional model, the results indicate that atmospheric pressure change had notable impact on the distribution of gob temperature field. The laboratory test system of gob temperature field was constructed, and the relative error between simulated and measured value was no greater than 9.6%, which verified the effectiveness of the proposed model. This work offers theoretical basis for accurate calculation of temperature and prediction of ignition source in mine gob, and has important implications on preventing spontaneous combustion of coal.展开更多
We admit it:this place doesn't have the coolest name-at least not in English.In Mandarin there's this nifty play on words where the character for‘beer’(pi,啤)has replaced part of the word for‘temper’(pi,脾...We admit it:this place doesn't have the coolest name-at least not in English.In Mandarin there's this nifty play on words where the character for‘beer’(pi,啤)has replaced part of the word for‘temper’(pi,脾)because they happen to sound the same.展开更多
In the experiment, the inhibition of isoflavones extracted from soybean and tempe to SP2/0 and Hela cells was studied, and the inhibition rate of each unit for cancer cells was also studied. The results showed that th...In the experiment, the inhibition of isoflavones extracted from soybean and tempe to SP2/0 and Hela cells was studied, and the inhibition rate of each unit for cancer cells was also studied. The results showed that the inhibition rate of tempe isoflavones to SP2/0 was 96.9% and to Hela cells was 69.5% when the concentration was 20μg·mL^-1. In the same condition, the inhibition rate of soybean isoflavones was 83.16% and 60.5%. With the decline of concentration, the inhibition rate decreased. The inhibition of isoflavones to SP2/0 did not exist when the concentration was 5-1.25μg·mL^-1.展开更多
This paper presents a smart compensation system based on MCA7707 (a kind of signal processor). The li near errors and high order errors of a sensor (especially piezoresistive sensor) can be corrected by using this s...This paper presents a smart compensation system based on MCA7707 (a kind of signal processor). The li near errors and high order errors of a sensor (especially piezoresistive sensor) can be corrected by using this system. It can optimize the process of piezoresi stive sensor calibration and compensation, then, a total error factor within 0.2 % of the sensor′s repeatability errors is obtained. Data are recorded and coeff icients are determined automatically by this system, thus, the sensor compensati on is simplified greatly. For operating easily, a wizard compensation program is designed to correct every error and to get the optimum compensation.展开更多
国际食品法典委员会修改单贝大豆产品等标准并征求意见
10月18日消息,世界卫生组织（WHO）及粮农组织（FAO）第20次亚洲会议（CCASIA20）同意修订如下产品标准：
1.“单贝（Tempe）”（CODEX STAN 313R-2013）标准中所列水分、蛋白质...国际食品法典委员会修改单贝大豆产品等标准并征求意见
10月18日消息,世界卫生组织（WHO）及粮农组织（FAO）第20次亚洲会议（CCASIA20）同意修订如下产品标准：
1.“单贝（Tempe）”（CODEX STAN 313R-2013）标准中所列水分、蛋白质含量、脂肪含量以及粗纤维含量分析方法被推荐标准方法中（CODEX STAND234-1999）相关分析方法取代。展开更多
《Couleurs du temps》是法国作曲家Yann Geslin于1982年创作的音响型电子音乐作品《Variations didactique》中的第二乐章。在作品中,作曲家以人的语言音响为素材,对其进行切分、重组、重复等变化方式将素材变形,并运用复调音乐的思维...《Couleurs du temps》是法国作曲家Yann Geslin于1982年创作的音响型电子音乐作品《Variations didactique》中的第二乐章。在作品中,作曲家以人的语言音响为素材,对其进行切分、重组、重复等变化方式将素材变形,并运用复调音乐的思维方式将它们组织在一起。通过对其二声部特征及其音响材料组织方式的分析,讨论复调性特征在音响型电子音乐中的体现。展开更多
基金Project(2012BAK04B05)supported by the National Science and Technology Support Program during the Twelfth Five-year Plan PeriodChina+2 种基金Project(51174113)supported by the National Natural Science Foundation of China(2012YQ240127)the National Key Scientific Instrument and Equipment Development ProjectChina
文摘The current temperature field model of mine gob does not take the boundary conditions of the atmospheric pressure into account, while the actual atmospheric pressure is influenced by weather, so as to produce differences between ventilation negative pressure of the working face and the negative pressure of gas drainage in gob, thus interfering the calculated results of gob temperature field. According to the characteristics of the actual air flow and temperature change in gob, a two-dimensional temperature field model of the gob was built, and the relational model between the air pressure of intake and outlet of the gob and the atmospheric pressure was established, which was introduced into the boundary conditions of temperature field to conduct calculation. By means of analysis on the simulation example, and comparison with the traditional model, the results indicate that atmospheric pressure change had notable impact on the distribution of gob temperature field. The laboratory test system of gob temperature field was constructed, and the relative error between simulated and measured value was no greater than 9.6%, which verified the effectiveness of the proposed model. This work offers theoretical basis for accurate calculation of temperature and prediction of ignition source in mine gob, and has important implications on preventing spontaneous combustion of coal.
文摘We admit it:this place doesn't have the coolest name-at least not in English.In Mandarin there's this nifty play on words where the character for‘beer’(pi,啤)has replaced part of the word for‘temper’(pi,脾)because they happen to sound the same.
基金Supported by Heilongjiang Province Science and Technique Foundation(C0131)
文摘In the experiment, the inhibition of isoflavones extracted from soybean and tempe to SP2/0 and Hela cells was studied, and the inhibition rate of each unit for cancer cells was also studied. The results showed that the inhibition rate of tempe isoflavones to SP2/0 was 96.9% and to Hela cells was 69.5% when the concentration was 20μg·mL^-1. In the same condition, the inhibition rate of soybean isoflavones was 83.16% and 60.5%. With the decline of concentration, the inhibition rate decreased. The inhibition of isoflavones to SP2/0 did not exist when the concentration was 5-1.25μg·mL^-1.
文摘This paper presents a smart compensation system based on MCA7707 (a kind of signal processor). The li near errors and high order errors of a sensor (especially piezoresistive sensor) can be corrected by using this system. It can optimize the process of piezoresi stive sensor calibration and compensation, then, a total error factor within 0.2 % of the sensor′s repeatability errors is obtained. Data are recorded and coeff icients are determined automatically by this system, thus, the sensor compensati on is simplified greatly. For operating easily, a wizard compensation program is designed to correct every error and to get the optimum compensation.
文摘《Couleurs du temps》是法国作曲家Yann Geslin于1982年创作的音响型电子音乐作品《Variations didactique》中的第二乐章。在作品中,作曲家以人的语言音响为素材,对其进行切分、重组、重复等变化方式将素材变形,并运用复调音乐的思维方式将它们组织在一起。通过对其二声部特征及其音响材料组织方式的分析,讨论复调性特征在音响型电子音乐中的体现。
