The control of Coleophora dahurica Flkv. by ULV spraying rare oil of malathior was popularized in lnner Mongolia Daxing’an Mountains in 1992-1993. The control area was 32744.3hm2, which was 98.2% of the suitable cont...The control of Coleophora dahurica Flkv. by ULV spraying rare oil of malathior was popularized in lnner Mongolia Daxing’an Mountains in 1992-1993. The control area was 32744.3hm2, which was 98.2% of the suitable control area in Inner Mongolia Daxing’an Mountains and 75%of the suitable area in Inner Mongolia respectively. Dosage was 1125 g/hm2. Control effectiveness was above 95%, the larvae density decreased from 52.5 to 0.94 per 50cm sample twig and direct economical benefit was 3,935,420 Chinese yuan.展开更多
In this paper, novel ultra low voltage (ULV) dual-rail NOR gates are presented which use the semi-floating-gate (SFG) structure to speed up the logic circuit. Higher speed in the lower supply voltages and robustness a...In this paper, novel ultra low voltage (ULV) dual-rail NOR gates are presented which use the semi-floating-gate (SFG) structure to speed up the logic circuit. Higher speed in the lower supply voltages and robustness against the input signal delay variations are the main advantages of the proposed gates in comparison to the previously reported domino dual-rail NOR gates. The simulation results in a typical TSMC 90 nm CMOS technology show that the proposed NOR gate is more than 20 times faster than conventional dual-rail NOR gate.展开更多
This paper presents the design of an ultra low-voltage (ULV) pseudo operational transconductance amplifier (P-OTA) that is able to operate with a single supply voltage as low as 0.4 V. The proposed circuit is based on...This paper presents the design of an ultra low-voltage (ULV) pseudo operational transconductance amplifier (P-OTA) that is able to operate with a single supply voltage as low as 0.4 V. The proposed circuit is based on the bulk-driven technique and use of cross-coupled self-cascode pairs that boosts the differential DC gain. The stability condition of this structure for the DC gain is considered by definition of two coefficients to cancel out a controllable percentage of the denominator. This expression for stability condition yield optimized value for the DC gain. Also, as the principle of operation of the proposed technique relies on matching conditions, Monte Carlo analyzes are considered to study of the behavior of the proposed circuit against mismatches. The designed P-OTA have a DC gain of 64 dB, 212 KHz unity gain bandwidth, 57phase margin that is loaded by 10 pF differential capacitive loads, while consume only 16 μW. Eventually, from the proposed P-OTA, a low-power Sample and Hold (S/H) circuit with sampling frequency of 10 KS/s has been designed and simulated. The correct functionality for this configuration is verified from –30℃ to 70℃. The simulated data presented is obtained using the HSPICE Environment and is valid for the 90 nm triple-well CMOS process.展开更多
随着现代人工作生活的日益忙碌，移动计算正成为很多人生活中必不可少的部分。但实话实说，每天背着笔记本电脑东奔西跑也不是个轻松的事儿，而要在手机或者PDA上干点啥，也够累的。究竟如何才能兼顾移动与计算应用呢？这个月我们在Med...随着现代人工作生活的日益忙碌，移动计算正成为很多人生活中必不可少的部分。但实话实说，每天背着笔记本电脑东奔西跑也不是个轻松的事儿，而要在手机或者PDA上干点啥，也够累的。究竟如何才能兼顾移动与计算应用呢？这个月我们在Medion公司找到了一款超移动设备（UMD）——Medion RIM 1000，或许能够引领未来移动计算的新风潮。展开更多
爱情有时也许就是需要距离和时间的考验，虽然Jack和Wendy已经相恋多年，但由于Wendy空姐的职业，两人总是聚少离别多。春节就成为两人可以享受的悠长假期，因此每年春节前前夕Jack总是要精心挑选一件礼物送给心爱的Wendy。项链、围巾...爱情有时也许就是需要距离和时间的考验，虽然Jack和Wendy已经相恋多年，但由于Wendy空姐的职业，两人总是聚少离别多。春节就成为两人可以享受的悠长假期，因此每年春节前前夕Jack总是要精心挑选一件礼物送给心爱的Wendy。项链、围巾、香水、手表……各种礼物Jack都已送过，今年送什么呢？“应该送一个更加实用的礼物，让我不在她身边的日子里也可以照顾她。”带着这样的想法，Jack将目光锁定在最新款的汉王T700 UMD（Ultra Mobile Device，泛指包含UMPC在内具有超越PC功能的超便携移动设备）之上，“它一定能够帮助我实现心愿”，当Jack看过T700的全部功能展示后，他眼中仿佛已经看到了Wendy使用T700时喜悦的场景了。于是，一台崭新的T700就进入了Jack的采购列表之中。展开更多
文摘The control of Coleophora dahurica Flkv. by ULV spraying rare oil of malathior was popularized in lnner Mongolia Daxing’an Mountains in 1992-1993. The control area was 32744.3hm2, which was 98.2% of the suitable control area in Inner Mongolia Daxing’an Mountains and 75%of the suitable area in Inner Mongolia respectively. Dosage was 1125 g/hm2. Control effectiveness was above 95%, the larvae density decreased from 52.5 to 0.94 per 50cm sample twig and direct economical benefit was 3,935,420 Chinese yuan.
文摘In this paper, novel ultra low voltage (ULV) dual-rail NOR gates are presented which use the semi-floating-gate (SFG) structure to speed up the logic circuit. Higher speed in the lower supply voltages and robustness against the input signal delay variations are the main advantages of the proposed gates in comparison to the previously reported domino dual-rail NOR gates. The simulation results in a typical TSMC 90 nm CMOS technology show that the proposed NOR gate is more than 20 times faster than conventional dual-rail NOR gate.
文摘This paper presents the design of an ultra low-voltage (ULV) pseudo operational transconductance amplifier (P-OTA) that is able to operate with a single supply voltage as low as 0.4 V. The proposed circuit is based on the bulk-driven technique and use of cross-coupled self-cascode pairs that boosts the differential DC gain. The stability condition of this structure for the DC gain is considered by definition of two coefficients to cancel out a controllable percentage of the denominator. This expression for stability condition yield optimized value for the DC gain. Also, as the principle of operation of the proposed technique relies on matching conditions, Monte Carlo analyzes are considered to study of the behavior of the proposed circuit against mismatches. The designed P-OTA have a DC gain of 64 dB, 212 KHz unity gain bandwidth, 57phase margin that is loaded by 10 pF differential capacitive loads, while consume only 16 μW. Eventually, from the proposed P-OTA, a low-power Sample and Hold (S/H) circuit with sampling frequency of 10 KS/s has been designed and simulated. The correct functionality for this configuration is verified from –30℃ to 70℃. The simulated data presented is obtained using the HSPICE Environment and is valid for the 90 nm triple-well CMOS process.
文摘随着现代人工作生活的日益忙碌，移动计算正成为很多人生活中必不可少的部分。但实话实说，每天背着笔记本电脑东奔西跑也不是个轻松的事儿，而要在手机或者PDA上干点啥，也够累的。究竟如何才能兼顾移动与计算应用呢？这个月我们在Medion公司找到了一款超移动设备（UMD）——Medion RIM 1000，或许能够引领未来移动计算的新风潮。
文摘爱情有时也许就是需要距离和时间的考验，虽然Jack和Wendy已经相恋多年，但由于Wendy空姐的职业，两人总是聚少离别多。春节就成为两人可以享受的悠长假期，因此每年春节前前夕Jack总是要精心挑选一件礼物送给心爱的Wendy。项链、围巾、香水、手表……各种礼物Jack都已送过，今年送什么呢？“应该送一个更加实用的礼物，让我不在她身边的日子里也可以照顾她。”带着这样的想法，Jack将目光锁定在最新款的汉王T700 UMD（Ultra Mobile Device，泛指包含UMPC在内具有超越PC功能的超便携移动设备）之上，“它一定能够帮助我实现心愿”，当Jack看过T700的全部功能展示后，他眼中仿佛已经看到了Wendy使用T700时喜悦的场景了。于是，一台崭新的T700就进入了Jack的采购列表之中。
