中国科学院机构知识库网格系统: 检索

Mitochondrial alternative oxidase pathway acts as an electron sink during photosynthetic induction in Rumex K-1 leaves 期刊论文 OAI收割
PHOTOSYNTHETICA, 2021, 卷号: 59, 期号: 4, 页码: 615-624
作者: Cheng, D. D.; Zhang, L. T.

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收藏 | 浏览/下载：37/0 | 提交时间：2022/02/18

alternative oxidase photodamage photosystem II photochemical efficiency photosynthetic induction Rumex K-1

Soil properties and the growth of wheat (Triticum aestivum L.) and maize (Zea mays L.) in response to reed (phragmites communis) biochar use in a salt-affected soil in the Yellow River Delta 期刊论文 OAI收割
AGRICULTURE ECOSYSTEMS & ENVIRONMENT, 2020, 卷号: 303, 页码: 107124
作者: Xiao, Liang; Yuan, Guodong; Feng, Lirong; Bi, Dongxue; Wei, Jing

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收藏 | 浏览/下载：32/0 | 提交时间：2021/12/01

K-rich biochar saline soil soil physical properties SAR nitrogen use efficiency

Trends of Yield and Soil Fertility in a Long-Term Wheat-Maize System 期刊论文 OAI收割
JOURNAL OF INTEGRATIVE AGRICULTURE, 2014, 卷号: 13, 期号: 2, 页码: 402-414
作者: Yang Xue-yun; Sun Ben-hua; Zhang Shu-lan

收藏 | 浏览/下载：30/0 | 提交时间：2015/12/11

wheat maize nitrogen use efficiency P balance K balance soil organic matter

Effects of experimental warming on stomatal traits in leaves of maize (Zea may L.) SCI/SSCI论文 OAI收割
2013
作者: Xu M.; Qiu S.

收藏 | 浏览/下载：92/0 | 提交时间：2014/12/24

Elevated temperature maize (Zea may L.) Ripley's K-function spatial distribution pattern stomatal aperture size and shape stomatal frequency radiation use efficiency arabidopsis-thaliana atmospheric co2 elevated co2 c-4 photosynthesis leaf surface drought susceptibility adaptive significance perennial grasses abscisic-acid

Plants use alternative strategies to utilize nonexchangeable potassium in minerals 期刊论文 iSwitch采集
PLANT AND SOIL, 2011, 卷号: 343, 期号: 1-2, 页码: 209-220
作者: Wang, Huo-Yan; Shen, Qin-Hua; Zhou, Jian-Min; Wang, Jing; Du, Chang-Wen

收藏 | 浏览/下载：28/0 | 提交时间：2019/10/10

Ryegrass Grain amaranth K efficiency K threshold Root exudates Minerals

Differences in the Efficiency of Potassium (K) Uptake and Use in Barley Varieties 期刊论文 iSwitch采集
AGRICULTURAL SCIENCES IN CHINA, 2011, 卷号: 10, 期号: 1, 页码: 101-108
作者: Wu Jin-tao; Zhang Xi-zhou; Li Ting-xuan; Yu Hai-ying; Huang Ping

收藏 | 浏览/下载：24/0 | 提交时间：2019/10/10

barley cluster analysis genotype K-efficiency

Fabrication of high-efficiency ultraviolet blazed gratings by use of direct Ar2-CHF3 ion-beam etching through a rectangular photoresist mask (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, May 24, 2011 - May 26, 2011, Beijing, China
Tan X.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

In ultraviolet spectroscopy groove irregularity and surface roughness of nanometer magnitude can cause a significant loss of diffraction efficiency. Therefore there is a constant need to improve the diffraction efficiency. A blazed grating can concentrate most of the light intensity into a desired diffraction order it is important to control the groove shape precisely so it is the optimum choice among gratings of different kinds of profile. As the operating wavelength of most UV spectral applications is less than 200 nm especially the blaze angle and the apical angle. We have presented a direct shaping method to fabricate EUV blazed gratings by using an ion-beam mixture of Ar+ and CHF2 +to etch K9 glass with a rectangular photoresist mask. With this method the required blaze angle is small we have succeeded in fabricating well-shaped UV blazed gratings with a 1200 line/mm groove density and 8.54 blaze angles and 1200 line/mm groove density and 11.68 blaze angles and the metrical efficiency is about 81% and 78%. The good performance of the gratings was verified by diffraction efficiency measurements. When one uses the etching model the conditions on the ion-beam grazing incident angle and the CHF3partial pressure should be noted. Besides since the etched groove shape depends on the aspect ratio of the photoresist mask ridge if we wish to fabricate larger gratings with this method we must improve the uniformity of the photoresist mask before ion-beam etching. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Sort optimization algorithm of median filtering based on FPGA (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Machine Vision and Human-Machine Interface, MVHI 2010, April 24, 2010 - April 25, 2010, Kaifeng, China
作者: Li S.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

The traditional sorting algorithm of median filtering is optimized according to the hardware structure features of FPGA. FPGA is used to acquire the data parallelly for comparing the data of the same column in the median filtering window. Comparing results shared by adjacent filter window are saved temporarily to match the new round of median filtering by using FPGA internal resources. This method can reduce the comparing times from current 21 down to 13 and improve the algorithm efficiency nearly 40%.The experimental results prove that the optimized algorithm can filter a 1K1K gray-level image in about 20ms which ensure the proposed algorithm can be applied in the real-time image median filtering system. 2010 IEEE.

Parallel estimation of translation for video stabilization (EI CONFERENCE) 会议论文 OAI收割
2010 6th International Conference on Wireless Communications, Networking and Mobile Computing, WiCOM 2010, September 23, 2010 - September 25, 2010, Chengdu, China
作者: Wang H.; Liu G.; Wang H.; Wang H.; Wang H.

收藏 | 浏览/下载：99/0 | 提交时间：2013/03/25

Translation motion estimation is the major aspect of video motion compensation especially in two-dimensional turntable. This paper presents a robust parallel estimation algorithm of translation in video stabilization system. The equivalent model of translation that derived is accorded with small rotation angle comparatively. A parallel algorithm based on grey mapping is used in local motion estimation to shorten the estimation time and improve the computation efficiency. After local motion vectors are calculated a fast filter can detect the spurious vectors avoiding possible jerks. The suggested translation estimation algorithm has been implemented on NVIDIA GTX 260 the experimental results show that the average time of the estimation and compensation finished in 16 ms/frame and stabilize 1k1k pixels sequence gray video up to 60 frames/s. 2010 IEEE.

Temperature characteristics of high power vertical cavity surface emitting lasers (EI CONFERENCE) 会议论文 OAI收割
Semiconductor Lasers and Applications III, November 12, 2007 - November 13, 2007, Beijing, China
作者: Qin L.

收藏 | 浏览/下载：30/0 | 提交时间：2013/03/25

By using oxidation confinement technology high power vertical-cavity surface-emitting lasers are fabricated in experiment. The electrical and optical performance characteristics such as threshold current efficiency emission wavelength and output power are measured under continuous wave (CW) condition at room temperature. The maximum output power is up to watt regime at wavelength of about 980nm. The temperature characteristics of the device are investigated experimentally in detail. The variation in lasing threshold current with temperature is studied. The characteristic temperature T0 of the device is derived and the value is about 211K. Such a high characteristic temperature T0 of threshold current can lead to good temperature sensitivity of the device. At the same time the lasing spectrum characteristics with temperature are also measured. The wavelength shift with temperature is just about 0.06nm/K. From the measured results it is shown that the device can still operate at high temperature condition.