2023年10月27日,为期4天的第二十七届亚洲国际动力传动与控制技术展览会(PTC ASIA 2023)在上海新国际博览中心圆满落幕。本届展会规模与影响力均创历史新高,迎来了超1700家企业,展出面积近10万平方米,来自德国、意大利等国际展团如约而...2023年10月27日,为期4天的第二十七届亚洲国际动力传动与控制技术展览会(PTC ASIA 2023)在上海新国际博览中心圆满落幕。本届展会规模与影响力均创历史新高,迎来了超1700家企业,展出面积近10万平方米,来自德国、意大利等国际展团如约而至,共吸引全球近15万人次专业观众到场,共同见证PTCASIA展会的新辉煌。展开更多
The nature of bonding in the title compounds has been studied by using CASSCF and FOCI techniques. The ground states of PtC and PtN are found to be (1)Sigma (+) and (2)Pi state arising primarily from:... 1 sigma (2)2 ...The nature of bonding in the title compounds has been studied by using CASSCF and FOCI techniques. The ground states of PtC and PtN are found to be (1)Sigma (+) and (2)Pi state arising primarily from:... 1 sigma (2)2 sigma (2)1 pi (4)1 delta (4)3 sigma (2) and...1 sigma (2)2 sigma (2)1 pi (4)1 delta (4)3 sigma (2)2 pi (1) configuration respectively and both of which form triple bond tone sigma, two pi bonds), but the bond of PtC is much stronger than that of PtN.展开更多
Eight dialkyl tetrabromophthalates (DATBPs) were synthesized by reacting tetrabromophthalic anhydride with excess alcohols which were used not only as a reactant but also as a solvent and using a quaternary ammonium s...Eight dialkyl tetrabromophthalates (DATBPs) were synthesized by reacting tetrabromophthalic anhydride with excess alcohols which were used not only as a reactant but also as a solvent and using a quaternary ammonium salt as a phase transfer catalyst (PTC). The yields were found to be between 85-93%. Their structures were characterized by IR, NMR and elementary analysis. The flame retardant properties of the compounds were also studied.展开更多
PTC ASIA 2003于2003年11月18日-21日在中国上海新国际博览中心召开。从1991年开始PTC展览会,已成功举办了七届,本次是第八届。该展览会是我国动力传动与控制技术领域的国际性大型展览会,已发展成为世界同行业展中亚洲最大,世界第...PTC ASIA 2003于2003年11月18日-21日在中国上海新国际博览中心召开。从1991年开始PTC展览会,已成功举办了七届,本次是第八届。该展览会是我国动力传动与控制技术领域的国际性大型展览会,已发展成为世界同行业展中亚洲最大,世界第三的知名品牌展。展开更多
MC记者:黄人豪研究员,听说您已连续多年亲自参加了国、内外的流体与控制展览活动。您能否对国内刚结束不久的PTC ASIA 2003 展作一评价呢? 黄人豪:正像您说的,2003年我又有幸亲自参加了国内外一些重大展览。首先是德国汉诺威博览会(HANN...MC记者:黄人豪研究员,听说您已连续多年亲自参加了国、内外的流体与控制展览活动。您能否对国内刚结束不久的PTC ASIA 2003 展作一评价呢? 黄人豪:正像您说的,2003年我又有幸亲自参加了国内外一些重大展览。首先是德国汉诺威博览会(HANNOVER MESSE,2003年4月8-12日),大家知道该展是全球规模最大的工业博览会,其中每两年一度(逢单)展开更多
文摘2023年10月27日,为期4天的第二十七届亚洲国际动力传动与控制技术展览会(PTC ASIA 2023)在上海新国际博览中心圆满落幕。本届展会规模与影响力均创历史新高,迎来了超1700家企业,展出面积近10万平方米,来自德国、意大利等国际展团如约而至,共吸引全球近15万人次专业观众到场,共同见证PTCASIA展会的新辉煌。
文摘The nature of bonding in the title compounds has been studied by using CASSCF and FOCI techniques. The ground states of PtC and PtN are found to be (1)Sigma (+) and (2)Pi state arising primarily from:... 1 sigma (2)2 sigma (2)1 pi (4)1 delta (4)3 sigma (2) and...1 sigma (2)2 sigma (2)1 pi (4)1 delta (4)3 sigma (2)2 pi (1) configuration respectively and both of which form triple bond tone sigma, two pi bonds), but the bond of PtC is much stronger than that of PtN.
文摘Eight dialkyl tetrabromophthalates (DATBPs) were synthesized by reacting tetrabromophthalic anhydride with excess alcohols which were used not only as a reactant but also as a solvent and using a quaternary ammonium salt as a phase transfer catalyst (PTC). The yields were found to be between 85-93%. Their structures were characterized by IR, NMR and elementary analysis. The flame retardant properties of the compounds were also studied.