Retinoblastoma (Rb) is the most common malignant'cancer of eye.So-Rb_(50) is the first Rb cell line established in China in 1988.It has passed to the 387th passage now.We collected cells of the 327th passage of SO...Retinoblastoma (Rb) is the most common malignant'cancer of eye.So-Rb_(50) is the first Rb cell line established in China in 1988.It has passed to the 387th passage now.We collected cells of the 327th passage of SO-Rb_(50),purified its genomic DNA and detected it with Rb and c-myc cDNA probes respectively(normal human white blood cells DNA was the control).We found the Rb gene was deleted while c-myc gene was amplified three times.This provides a basis for further study of the regulation of tumor development and tumor reversal with this cell line in vitro.Eye Science 1993;9:34-37.展开更多
为了研究高岭土电渗过程中在电极处加入CaCl_2溶液对电流、排水量、界面电阻、土体电阻率及最终抗剪强度等的影响,开展了相关室内试验。结果表明:电极处加入CaCl_2溶液后,电流的减小趋势得到有效控制,电渗过程中电流大小与加入CaCl_2溶...为了研究高岭土电渗过程中在电极处加入CaCl_2溶液对电流、排水量、界面电阻、土体电阻率及最终抗剪强度等的影响,开展了相关室内试验。结果表明:电极处加入CaCl_2溶液后,电流的减小趋势得到有效控制,电渗过程中电流大小与加入CaCl_2溶液的量有关,也可能与阳极所加CaCl_2溶液所占比例或者与CaCl_2溶液加入的时间有关;排水量变大,本试验条件下电渗排水量提高了10.9%;电极处加入CaCl_2溶液对阴极处界面电阻的减小很明显;电极处加入CaCl_2溶液后土体总电阻率下降较为明显,而阴极附近土体电阻率的下降对土体总电阻率下降起主要贡献;阳极和中部土体最终抗剪强度提高比较明显,尤其是阳极土体最终抗剪强度提高了16.4 k Pa,但阴极土体抗剪强度无明显提高,因此可以考虑用反转电极的方法来加固阴极土体。该研究可为高岭土电渗试验提供新思路。展开更多
针对动态电压/频率调整系统芯片中时钟同步问题,设计一个具有宽工作频率范围和固定锁定周期的快速锁定全数字逐次逼近延时锁定环,采用改进的可复位数字控制延时线方法,在减小面积和提高最高工作频率的同时,有效地解决传统全数字逐次逼...针对动态电压/频率调整系统芯片中时钟同步问题,设计一个具有宽工作频率范围和固定锁定周期的快速锁定全数字逐次逼近延时锁定环,采用改进的可复位数字控制延时线方法,在减小面积和提高最高工作频率的同时,有效地解决传统全数字逐次逼近延时锁定环的谐波锁定和零延时陷阱问题。整个延时锁定环采用TSMC-65 nm CM OS工艺标准单元库实现,仿真结果表明,在典型工艺角和25℃情况下,工作频率范围为250 M Hz^2 GHz,锁定时间为固定的18个输入时钟周期,当电源电压为1.2 V、输入时钟频率为2 GHz时,功耗为0.4 m W。展开更多
基金The project was supported by National Natural Science Foundation of China(NAFC)
文摘Retinoblastoma (Rb) is the most common malignant'cancer of eye.So-Rb_(50) is the first Rb cell line established in China in 1988.It has passed to the 387th passage now.We collected cells of the 327th passage of SO-Rb_(50),purified its genomic DNA and detected it with Rb and c-myc cDNA probes respectively(normal human white blood cells DNA was the control).We found the Rb gene was deleted while c-myc gene was amplified three times.This provides a basis for further study of the regulation of tumor development and tumor reversal with this cell line in vitro.Eye Science 1993;9:34-37.
文摘为了研究高岭土电渗过程中在电极处加入CaCl_2溶液对电流、排水量、界面电阻、土体电阻率及最终抗剪强度等的影响,开展了相关室内试验。结果表明:电极处加入CaCl_2溶液后,电流的减小趋势得到有效控制,电渗过程中电流大小与加入CaCl_2溶液的量有关,也可能与阳极所加CaCl_2溶液所占比例或者与CaCl_2溶液加入的时间有关;排水量变大,本试验条件下电渗排水量提高了10.9%;电极处加入CaCl_2溶液对阴极处界面电阻的减小很明显;电极处加入CaCl_2溶液后土体总电阻率下降较为明显,而阴极附近土体电阻率的下降对土体总电阻率下降起主要贡献;阳极和中部土体最终抗剪强度提高比较明显,尤其是阳极土体最终抗剪强度提高了16.4 k Pa,但阴极土体抗剪强度无明显提高,因此可以考虑用反转电极的方法来加固阴极土体。该研究可为高岭土电渗试验提供新思路。
文摘针对动态电压/频率调整系统芯片中时钟同步问题,设计一个具有宽工作频率范围和固定锁定周期的快速锁定全数字逐次逼近延时锁定环,采用改进的可复位数字控制延时线方法,在减小面积和提高最高工作频率的同时,有效地解决传统全数字逐次逼近延时锁定环的谐波锁定和零延时陷阱问题。整个延时锁定环采用TSMC-65 nm CM OS工艺标准单元库实现,仿真结果表明,在典型工艺角和25℃情况下,工作频率范围为250 M Hz^2 GHz,锁定时间为固定的18个输入时钟周期,当电源电压为1.2 V、输入时钟频率为2 GHz时,功耗为0.4 m W。
