Objective:To explore the clinical application effect of self-designed automatic constant temperature moxibustion box.Methods:From June 2016 to January 2017,150 patients with neck,shoulder,back and leg pain admitted to...Objective:To explore the clinical application effect of self-designed automatic constant temperature moxibustion box.Methods:From June 2016 to January 2017,150 patients with neck,shoulder,back and leg pain admitted to our hospital were treated with moxibustion under the informed consent of the patients.The patients were randomly divided into control group and observation group,75 cases each.The group used traditional moxibustion box for moxibustion treatment,and the observation group used automatic constant temperature moxibustion box for moxibustion treatment for 15 days.After the treatment,the patient's safety,comfort,satisfaction and adverse reactions were compared,and the results were analyzed using SPSS 20 statistical software.Results:The comfort and satisfaction in study group were all superior to that of control group,with statistically significant difference(P<0.01).For patient's safety,the ratio of patients suffered from scald in study and control groups was 5.3/100 and 0,respectively.Conclusions:It is of great significance for improving clinical efficacy and preventing medical risks.It is worthy of clinical application.展开更多
Vehicle hydraulic pump station, often work environment is poor, the environment temperature difference is very big, the natureof the hydraulic oil is affected by temperature is very big, a lot of damage, PLC automatic...Vehicle hydraulic pump station, often work environment is poor, the environment temperature difference is very big, the natureof the hydraulic oil is affected by temperature is very big, a lot of damage, PLC automatic control scheme and design of pumping station, the oiltemperature automatic control system realized the automation of the oil temperature control, greatly improving the pump station of the outdoorenvironment to adapt to the performance.展开更多
A novel wide-range CMOS variable gain amplifier （VGA） topology is presented. The proposed VGA is composed of a variable transconductor and a novel variable output resistor and can offer a high gain variation range o...A novel wide-range CMOS variable gain amplifier （VGA） topology is presented. The proposed VGA is composed of a variable transconductor and a novel variable output resistor and can offer a high gain variation range of 80dB while using a single variable-gain stage. Temperature-compensation and decibel-linear gain characteristic are achieved by using a control circuit that provides a gain error lower than ±1.5dB over the full temperature and gain ranges. Realized in 0.25μm CMOS technology, a prototype of the proposed VGA provides a total gain range of 64.5dB with 55.6dB-linear range,a P-1dB varying from - 17.5 to 11.5dBm,and a 3dB-bandwith varying from 65 to 860MHz while dissipating 16.5mW from a 2.5V supply voltage.展开更多
An integrated laser diode driver(LDD) driving an edge-emitting laser diode was designed and fabricated by 0.35 μm BiCMOS technology. This paper proposes a scheme which combines the automatic power control loop and te...An integrated laser diode driver(LDD) driving an edge-emitting laser diode was designed and fabricated by 0.35 μm BiCMOS technology. This paper proposes a scheme which combines the automatic power control loop and temperature com-pensation for modulation current in order to maintain constant extinction ratio and average optical power. To implement tem-perature compensation for modulation current,a novel circuit which generates a PTAT current by using the injecting base current of a bipolar transistor in saturation region,and alternates the amplifier feedback loop(closed or not) to control the state of the current path is presented. Simulation results showed that programmed by choice of external resistors,the IC can provide modu-lation current from 5 mA to 85 mA with temperature compensation adjustments and independent bias current from 4 mA to 100 mA. Optical test results showed that clear eye-diagrams can be obtained at 155 Mbps,with the output optical power being nearly constant,and the variation of extinction ratio being lower than 0.7 dB.展开更多
文摘Objective:To explore the clinical application effect of self-designed automatic constant temperature moxibustion box.Methods:From June 2016 to January 2017,150 patients with neck,shoulder,back and leg pain admitted to our hospital were treated with moxibustion under the informed consent of the patients.The patients were randomly divided into control group and observation group,75 cases each.The group used traditional moxibustion box for moxibustion treatment,and the observation group used automatic constant temperature moxibustion box for moxibustion treatment for 15 days.After the treatment,the patient's safety,comfort,satisfaction and adverse reactions were compared,and the results were analyzed using SPSS 20 statistical software.Results:The comfort and satisfaction in study group were all superior to that of control group,with statistically significant difference(P<0.01).For patient's safety,the ratio of patients suffered from scald in study and control groups was 5.3/100 and 0,respectively.Conclusions:It is of great significance for improving clinical efficacy and preventing medical risks.It is worthy of clinical application.
文摘Vehicle hydraulic pump station, often work environment is poor, the environment temperature difference is very big, the natureof the hydraulic oil is affected by temperature is very big, a lot of damage, PLC automatic control scheme and design of pumping station, the oiltemperature automatic control system realized the automation of the oil temperature control, greatly improving the pump station of the outdoorenvironment to adapt to the performance.
文摘A novel wide-range CMOS variable gain amplifier （VGA） topology is presented. The proposed VGA is composed of a variable transconductor and a novel variable output resistor and can offer a high gain variation range of 80dB while using a single variable-gain stage. Temperature-compensation and decibel-linear gain characteristic are achieved by using a control circuit that provides a gain error lower than ±1.5dB over the full temperature and gain ranges. Realized in 0.25μm CMOS technology, a prototype of the proposed VGA provides a total gain range of 64.5dB with 55.6dB-linear range,a P-1dB varying from - 17.5 to 11.5dBm,and a 3dB-bandwith varying from 65 to 860MHz while dissipating 16.5mW from a 2.5V supply voltage.
基金Project (No. 2006AA01Z226) supported by the Hi-Tech Researchand Development Program (863) of China
文摘An integrated laser diode driver(LDD) driving an edge-emitting laser diode was designed and fabricated by 0.35 μm BiCMOS technology. This paper proposes a scheme which combines the automatic power control loop and temperature com-pensation for modulation current in order to maintain constant extinction ratio and average optical power. To implement tem-perature compensation for modulation current,a novel circuit which generates a PTAT current by using the injecting base current of a bipolar transistor in saturation region,and alternates the amplifier feedback loop(closed or not) to control the state of the current path is presented. Simulation results showed that programmed by choice of external resistors,the IC can provide modu-lation current from 5 mA to 85 mA with temperature compensation adjustments and independent bias current from 4 mA to 100 mA. Optical test results showed that clear eye-diagrams can be obtained at 155 Mbps,with the output optical power being nearly constant,and the variation of extinction ratio being lower than 0.7 dB.
