四棵树河流域冰洪形成过程分析及防治建议

一、四棵树河流域概况 1．基本情况 四棵树河发源于天山北坡,是新疆北部准噶尔盆地南缘的一条中小河流,流域全长137km,流域总面积6669km^2。四棵树河流经塔城地区乌苏市的五镇二乡一场．灌溉的耕地面积为23333hm^2．占全市总耕地面积的48．3％。流域有农业人口7万余人,占全市农业人口的47％。灌域土地资源充足,有着丰富的光热条件和悠久的耕作历史,是乌苏市的主要粮棉产区。     

High‐Performance Flexible Pressure and Temperature Sensors with Complex Leather Structure

The ability of the skin to be pressure‐sensitive has prompted scientists to develop materials and equipment to simulate this function. Recently, flexible and stretchable artificial electronic skin has received increasing attention with its unique ability to detect subtle pressure changes. Pressure sensing is one of the key functions of electronic skin devices. Here, a stretchy and highly sensitive pressure sensor is developed that used a polydimethylsiloxane (PDMS) film with leather composite layer as flexible part. These features enable the sensor to accurately detect a variety of human activities, such as small finger movements and bending, pulse and so on. The sensor is found to have a good sensing signal for temperature. This feature provides great promise for sensors to detect temperature.     

Wide temperature range negative temperature coefficient thermistor of a Y2O3 modified LaMnO3 bilayer thin film

Journal of Materials Science: Materials in Electronics - A bilayer architecture was established to modify the negative temperature coefficient (NTC) properties of LaMnO3 thin films. By...     

新疆白杨河流域水资源开发利用与保护对策研究

<正>一、白杨河流域水资源概况1.水资源现状新疆白杨河流域水资源总量4.675亿m3,多年平均地表水资源量为3.941亿m3,其中,白杨河水系2.450亿m3。地下水资源总量为3.720亿m3,其中天然补给量0.734亿m3,地表水转化补给量为2.990亿m3,流     

Flexible Humidity and Pressure Sensors Realized by Molding and Inkjet Printing Processes with Sandwich Structure

Flexible and wearable devices are important parts toward the realization of artificial intelligence and have an irreplaceable advantage over traditional rigid sensors. In this work, a film with double surface structure is prepared by using sandpaper and the leather with a rhombic structure as a mold, thereby obtaining a sandwich structure resistive type pressure sensor, which has high sensitivity (77.78 kPa^?1, 24 Pa minimum detection) and wide detection range (0.024–230 kPa). The sensors have fast response time (30 ms) and high reliability over 5000 repetitive cycles. The humidity sensor is printed on the top layer of the sensor by using screen printing and inkjet printing technique, and the sandwich structure humidity and pressure sensor is obtained. The humidity sensors show the sensitivities of 0.137/%, 1.57/%, and 11.145/% in the relative humidity range from 25 to 55%, 55 to 70%, and 70 to 80%, respectively. Such sensors not only have excellent capabilities in pressure and humidity detection, but also avoid the complex process of multiple single‐function devices stacked on each other. The applications of sensors in monitoring artery pulse waves, detecting spatial pressure distribution, and sweat is demonstrated.