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Assessments of 16 Exploited Fish Stocks in Chinese Waters Using the CMSY and BSM Methods
期刊论文
FRONTIERS IN MARINE SCIENCE, 2020, 卷号: 7, 页码: 10
作者:
Zhai, Lu
;
Liang, Cui
;
Pauly, Daniel
收藏
  |  
浏览/下载:16/0
  |  
提交时间:2021/04/12
data-poor fisheries
Chinese coastal fisheries
biomass declines
CMSY
stock assessments
Transjugular Intrahepatic Portosystemic Shunt:The Impact of Portal Venous Pressure Declines on Shunt Patency and Clinical Efficacy
期刊论文
ACADEMIC RADIOLOGY, 2019, 卷号: 26, 期号: 2
作者:
Wan, Yue-Meng
;
Li, Yu-Hua
;
Xu, Zhi-Yuan
;
Wu, Hua-Mei
;
Wu, Xi -Nan
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  |  
浏览/下载:15/0
  |  
提交时间:2019/12/04
Transjugular intrahepatic portosystemic shunt (TIPS)
Portal venous pressure declines (PVDs)
Shunt patency
Variceal rebleeding
Hepatic encephalopathy
Overall survival
The Effect of Neonicotinoid Insecticide and Fungicide on Sugar Responsiveness and Orientation Behavior of Honey Bee (Apis mellifera) in Semi-Field Conditions
期刊论文
INSECTS, 2018, 卷号: 9, 期号: 4, 页码: -
作者:
Jiang, Xingchuan
;
Wang, Zhengwei
;
He, Qibao
;
Liu, Qiongqiong
;
Li, Xinyang
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  |  
浏览/下载:33/0
  |  
提交时间:2019/04/22
Declines
Survival
Exposure
Changes of flowering phenology and flower size in rosaceous plants from a biodiversity hotspot in the past century
期刊论文
SCIENTIFIC REPORTS, 2016, 卷号: 6, 期号: 0, 页码: 28302
作者:
Yu, Q (Yu, Qin)
;
Tian, B (Tian, Bin)
;
Yang, YP (Yang, Yong-Ping)
;
Duan, YW (Duan, Yuan-Wen)
;
Yang, YP
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  |  
浏览/下载:15/0
  |  
提交时间:2017/09/27
Pollinated Plants
Climate
Responses
Declines
Animals
Britain
Trends
Filling a gap in the distribution of Batrachochytrium dendrobatidis: evidence in amphibians from northern China.
期刊论文
Dis Aquat Organ, 2016, 卷号: Vol.118 No.3, 页码: 259-265
作者:
Yan,Shaofei
;
Wang,Supen
;
Li,Yiming
;
Soto-Azat,Claudio
;
Yang,Xuejiao
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  |  
浏览/下载:19/0
  |  
提交时间:2019/04/22
POPULATION DECLINES
WIDESPREAD PRESENCE
INFECTIOUS-DISEASE
AMERICAN BULLFROG
RANA-CATESBEIANA
KILLING FUNGUS
CHYTRIDIOMYCOSIS
FROGS
PATHOGEN
WILDLIFE
Selective extinction of Triassic marine reptiles during long-term sea-level changes illuminated by seawater strontium isotopes
期刊论文
palaeogeography palaeoclimatology palaeoecology, 2014
Kelley, Neil P.
;
Motani, Ryosuke
;
Jiang, Da-yong
;
Rieppel, Olivier
;
Schmitz, Lars
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  |  
浏览/下载:4/0
  |  
提交时间:2015/11/11
Triassic
Marine reptile
Durophagy
Sea level
Extinction
Strontium isotopes
PREDATOR DECLINES
MASS EXTINCTIONS
FOSSIL RECORD
EVOLUTION
HISTORY
BIODIVERSITY
DIVERSITY
HETEROGENEITY
SR-87/SR-86
VERTEBRATES
Effect of soft-iron impellers on the von Kármán–sodium dynamo
期刊论文
Physical review, E. Statistical, nonlinear, and soft matter physics, 2014, 期号: 1, 页码: 013012-1-013012-7
作者:
Mingtian Xu
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  |  
浏览/下载:3/0
  |  
提交时间:2019/12/17
predominates
action
declines
Effect of Different Fertilizer Application on the Soil Fertility of Paddy Soils in Red Soil Region of Southern China
SCI/SSCI论文
2012
Dong W. Y.
;
Zhang X. Y.
;
Wang H. M.
;
Dai X. Q.
;
Sun X. M.
;
Qiu W. W.
;
Yang F. T.
收藏
  |  
浏览/下载:29/0
  |  
提交时间:2014/12/25
long-term fertilization
organic-matter
phosphorus fractions
mineral
fertilizers
subtropical china
northeast china
yield declines
crop
yields
rice
carbon
The ship-borne infrared searching and tracking system based on the inertial platform (EI CONFERENCE)
会议论文
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
Li Y.
;
Zhang H.
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浏览/下载:26/0
  |  
提交时间:2013/03/25
As a result of the radar system got interferenced or in the state of half silent
it can cause the guided precision drop badly In the modern electronic warfare
therefore it can lead to the equipment depended on electronic guidance cannot strike the incoming goals exactly. It will need to rely on optoelectronic devices to make up for its shortcomings
but when interference is in the process of radar leading
especially the electro-optical equipment is influenced by the roll
pitch and yaw rotation
it can affect the target appear outside of the field of optoelectronic devices for a long time
so the infrared optoelectronic equipment can not exert the superiority
and also it cannot get across weapon-control system "reverse bring" missile against incoming goals. So the conventional ship-borne infrared system unable to track the target of incoming quickly
the ability of optoelectronic rivalry declines heavily.Here we provide a brand new controlling algorithm for the semi-automatic searching and infrared tracking based on inertial navigation platform. Now it is applying well in our XX infrared optoelectronic searching and tracking system. The algorithm is mainly divided into two steps: The artificial mode turns into auto-searching when the deviation of guide exceeds the current scene under the course of leading for radar.When the threshold value of the image picked-up is satisfied by the contrast of the target in the searching scene
the speed computed by using the CA model Least Square Method feeds back to the speed loop. And then combine the infrared information to accomplish the closed-loop control of the infrared optoelectronic system tracking. The algorithm is verified via experiment. Target capturing distance is 22.3 kilometers on the great lead deviation by using the algorithm. But without using the algorithm the capturing distance declines 12 kilometers. The algorithm advances the ability of infrared optoelectronic rivalry and declines the target capturing time by using semi-automatic searching and reliable capturing-tracking
when the lead deviation of the radar is great. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
Dynamic optimum design and analysis of cam wave generator for harmonic gear drive (EI CONFERENCE)
会议论文
2011 International Conference on Information and Automation, ICIA 2011, June 6, 2011 - June 8, 2011, Shenzhen, China
Xiao Q.
;
Han X.
;
Jia H.
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浏览/下载:16/0
  |  
提交时间:2013/03/25
Mathematical models of structural optimization were established for the cam wave generator
then a conceptual model
by integrally taking its static and dynamic performance into consideration
which satisfied the model acted by four concentrated forces
while the dynamic optimum design was carried out. The topology optimization of the cam wave generator was performed based on artificial material density method
was obtained. And the size optimization of the cam wave generator was also executed based on the zero-order method in software Ansys after setting up its parameterized model. The optimized results indicate that its final volume declines to 1284.217mm3 from its 1397.830mm3
which reduced by 42.18% than the original volume of cam (2221.224mm3). Simultaneously
the static analysis and modal analysis were implemented
and the results show that the static and dynamic performance complies with the design requirements
proving that the results of dynamic optimum design are reasonable. The optimized results in paper are realizable in engineering. And the study method provides not only a reference to decreasing design mass and lowering inertia of the cam wave generator
but also an important basis of lightweight design of harmonic gear drive. 2011 IEEE.
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