The interaction and its variation between magnetic grains in two kinds of magnetic recording tapes are investigated by first-order reversal curves （FORC） and the 5M method. The composition and microstructure of the ...The interaction and its variation between magnetic grains in two kinds of magnetic recording tapes are investigated by first-order reversal curves （FORC） and the 5M method. The composition and microstructure of the samples are characterised by x-ray diffraction and scanning electron microscope. The FORC diagram can provide more accurate information of the interaction and its variation, but the 5M curves cannot. The positive interaction field and the large variation of the interaction field have opposite effects on the δM curve.展开更多
目的观察99mTc-MDP骨扫描在前列腺癌骨转移诊断中的作用。方法对326例前列腺癌患者行99mTcMDP全身骨扫描;入院后即抽取空腹静脉血3 m L以透射免疫比浊法检测血清C-反应蛋白(CRP),采用分光光度法检测血清碱性磷酸酶(ALP)、Ca、P。结果99m...目的观察99mTc-MDP骨扫描在前列腺癌骨转移诊断中的作用。方法对326例前列腺癌患者行99mTcMDP全身骨扫描;入院后即抽取空腹静脉血3 m L以透射免疫比浊法检测血清C-反应蛋白(CRP),采用分光光度法检测血清碱性磷酸酶(ALP)、Ca、P。结果99mTc-MDP骨扫描显示无骨转移(阴性)195例;有骨转移(阳性)131例,其中Ⅰ级62例、Ⅱ级25例、Ⅲ级44例。与99mTc-MDP骨扫描阴性者比较,骨扫描阳性者血清CRP水平升高(P<0.01),但血清ALP、Ca、P水平无明显变化(P均>0.05)。结论99mTc-MDP全身骨扫描可作为诊断前列腺癌骨转移的筛选手段,血清CRP越高,99mTc-MDP全身骨扫描阳性率就越高。展开更多
Let {A, B} be a complete system of the closed orientable surface F of genus 2. A simple closed curve C on F is separating with respect to （A, B） if it is disjoint from A U B and it cuts F into two once-punctured tor...Let {A, B} be a complete system of the closed orientable surface F of genus 2. A simple closed curve C on F is separating with respect to （A, B） if it is disjoint from A U B and it cuts F into two once-punctured tori X, Y with A belong X, B belong Y. Let γ be a simple closed curve on F which is disjoint from A ∪ B and intersects C essentially in two points. In this paper, we show that up to isotopy, {hγ^n（C） ： n ∈ Z} is the set containing all the simple closed curves on F which is separating with respect to （A, B）, where hγ is the Dehn twist along γ on F. This also shows how two simple closed curves on F which are separating with respect to （A, B） are related. The result can be applied to yield all Haken spheres of a Heegaard splitting V∪F W which are weakly equivalent to a given Heken sphere of the splitting.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 50672008 and 50971023)Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20090006120019)
文摘The interaction and its variation between magnetic grains in two kinds of magnetic recording tapes are investigated by first-order reversal curves （FORC） and the 5M method. The composition and microstructure of the samples are characterised by x-ray diffraction and scanning electron microscope. The FORC diagram can provide more accurate information of the interaction and its variation, but the 5M curves cannot. The positive interaction field and the large variation of the interaction field have opposite effects on the δM curve.
文摘目的观察99mTc-MDP骨扫描在前列腺癌骨转移诊断中的作用。方法对326例前列腺癌患者行99mTcMDP全身骨扫描;入院后即抽取空腹静脉血3 m L以透射免疫比浊法检测血清C-反应蛋白(CRP),采用分光光度法检测血清碱性磷酸酶(ALP)、Ca、P。结果99mTc-MDP骨扫描显示无骨转移(阴性)195例;有骨转移(阳性)131例,其中Ⅰ级62例、Ⅱ级25例、Ⅲ级44例。与99mTc-MDP骨扫描阴性者比较,骨扫描阳性者血清CRP水平升高(P<0.01),但血清ALP、Ca、P水平无明显变化(P均>0.05)。结论99mTc-MDP全身骨扫描可作为诊断前列腺癌骨转移的筛选手段,血清CRP越高,99mTc-MDP全身骨扫描阳性率就越高。
基金The NSF (10171024,10471020) of Chinaa grant of the outstanding Youth fellowship of Hei Long Jiang Province and the Science Foundation (20060106) for Yong Teachers of Northeast Normal University.
文摘Let {A, B} be a complete system of the closed orientable surface F of genus 2. A simple closed curve C on F is separating with respect to （A, B） if it is disjoint from A U B and it cuts F into two once-punctured tori X, Y with A belong X, B belong Y. Let γ be a simple closed curve on F which is disjoint from A ∪ B and intersects C essentially in two points. In this paper, we show that up to isotopy, {hγ^n（C） ： n ∈ Z} is the set containing all the simple closed curves on F which is separating with respect to （A, B）, where hγ is the Dehn twist along γ on F. This also shows how two simple closed curves on F which are separating with respect to （A, B） are related. The result can be applied to yield all Haken spheres of a Heegaard splitting V∪F W which are weakly equivalent to a given Heken sphere of the splitting.
