检索结果-南通市图书馆

Effects of Dietary Net Energy Density and Standardized Ileal Digestible Lysine: Net Energy Ratio on the Performance and Carcass Characteristic of Growing-Finishing Pigs Fed Low Crude Protein Supplemented with Crystalline Amino Acids Diets

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2011年第4期10卷 602-610页

作者： ZHANG Gui-jie yi Xue-wu CHU Li-cui LU ning Htoo John QIAO Shi-yan State Key Laboratory on Animal Nutrition College of Animal Science and Technology China Agricultural University Beijing 100193 P. R. China Evonik Degussa GmbH Rodenbacher Chaussee 4 Hanau 63457 Germany

Two 3×3 factorial design trials with 1 080 of Yorkshire×Landrace×Duroc barrows were conducted to investigate the effects of dietary net energy （NE） density and standardized ileal digestible （SID） lysine：NE ratio on the performance of growing- finishing pigs and carcass characteristic of finishing pigs fed low crude protein （CP） supplemented with crystalline amino acids （CAA） diets. Low CP corn-soybean meal basal diets （14% for Exp. 1 and 11% for Exp. 2） supplemented with crystalline lysine, methionine, threonine, and tryptophan were formulated. Nine treatments with increasing NE density and SID lysine：NE ratio were used in each trial （Exp. 1： 9.66, 9.87, and 10.08 MJ kg-1 NE, 0.89, 0.96, and 1.03 g MJ-1 SID lysine： NE; Exp. 2： 9.83, 10.04, and 10.25 MJ kg-1 NE, 0.69, 0.76, and 0.83 g MJ-1 SID lysine：NE）. In Exp. 1, we observed that the average daily gain （ADG） for barrows that received the diet containing 9.87 MJ kg-1 NE was significantly higher than that of barrows fed a 9.66 MJ kg-1 NE diet （P0.05）, but no difference was observed when compared with barrows that received a diet containing 10.08 MJ kg-1 NE （P0.05）. The ADG was affected both linearly （P0.05） and quadratically （P0.05） as the SID lysine：NE ratio increased. The NE density or SID lysine：NE ratio and their interaction had no effect on the average daily feed intake （ADFI） and serum urea nitrogen （SUN）（P0.05）. The feed to gain ratio （F：G） decreased （linearly, P0.05; quadratically, P0.05） as the NE density or SID lysine：NE ratio increased, but no interaction of NE density and SID lysine： NE ratio on the F：G. In Exp. 2, the dietary NE density both linearly （P0.05） and quadratically （P0.05） affected the ADG and F：G. Barrows that received a diet containing 10.04 MJ kg-1 NE had a greater ADG （P0.05） than barrows that received a 9.83 MJ kg-1 diet, but there was no difference （P0.05） as compared with barrows that received a diet containing 10.25 MJ kg-1 NE. F：G was significantly higher （P0.05） for barrows that re

关键词： pig lysine net energy growth performance carcass characteristic

Zeolite-based Electrolyte Accelerating the Realization of Solid-state Li-Air Battery

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2021年第3期37卷 801-802页

作者： LIU Fang cui yi Department of Materials Science and Engineering Stanford UniversityStanfordCA94305USA Stanford Institute for Materials and Energy Sciences SLAC National Accelerator LaboratoryMenlo ParkCA94025USA

Solid-state lithium-air battery represents one of the most promising energy storage systems to simultaneously achieve high energy density,safety,and *** inorganic solid electrolytes are not suitable for the lithium-air systems due to their spontaneous reactions with lithium and/or ***,the large-scale production of inorganic solid electrolytes at a low cost remains highly challenging to date.

关键词： Battery battery lithium

Personalized Federated Learning for Individual Consumer Load Forecasting

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2023年第1期9卷 326-330页

作者： yi Wang ning Gao Gabriela Hug Department of Electrical and Electronic Engineering The University of Hong KongHong KongChinaare also with ETH ZurichZurichSwitzerland Power Systems Laboratory ETH Zurich8092 ZurichSwitzerland

Installation of smart meters enables electricity retailers or consumers to implement individual load forecasting for demand *** individual load forecasting model can be trained either on each consumer’s own smart meter data or the smart meter data of multiple *** former practice may suffer from overfitting if a complex model is trained because the dataset is limited;the latter practice cannot protect the privacy of individual *** paper tackles the dilemma by proposing a personalized federated approach for individual consumer load ***,a group of consumers first jointly train a federated forecasting model on the shared smart meter data pool,and then each consumer personalizes the federated forecasting model on their own *** case studies are conducted on an open dataset of 100 *** verify the proposed method can enhance forecasting accuracy by making full use of data from other consumers with privacy protection.

关键词： Federated learning load forecasting personalization privacy-preserving smart meter

Synthesis and Structural Characterization of a New Hydrogen-bonded Polyrotaxane of [Co(H_2O)_6]_(2+) with 1,1′-(Propane-1,3-diyl)dipyridinium-4-carboxylate

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第8期25卷 957-964页

作者： JIANG ning-yi LI Song-Lin Department of Chemistry College of Science Tianjin University Tianjin 300072 China

A new double betaine 1,1′-（propane-1,3-diyl）dipyridinium-4-carboxylate L has been synthesized. Reaction of 1, 1′-（propane-1,3-diyl）dipyridinium-4-carboxylate tetrahydrate 1 with Co（ClO4）2-6H2O leads to the formation of a new Co（Ⅱ） coordination compound, namely [Co（H2O）6]-2H2O-2L-2ClO4 2. The crystal structures of 1 and 2 have been determined by single-crystal X-ray diffraction method. Crystal data for 1. monoclinic, space group C2/c, a = 18.945（4）, b = 7.700（2）, c = l 1.888（2）A,β = 101.67（3）°, V = 1698.3（6） A^3, Z = 4, F（000） = 760.0, Dc = 1.402 g/cm^3, the final R = 0.0607 and wR = 0.1607 for 950 observed reflections （1 〉 2σ（I））; and those for 2： monoclinic, space group P21/c, a = 17.982（1）, b = 15.879 （1）, c = 7.0716（5）/A,β= 100.675（1）°, V= 1984.3（3） ,A^3 Z= 4, F（000） = 1010.0, Dc = 1.631 g/cm^3, the final R = 0.0316 and wR = 0.0896 for 3784 observed reflections （1 〉20（I））. Crystal structure analysis indicates that in 1, molecules of L in a ＂V-shaped＂ conformation are linked to chains sustained by O-H…O hydrogen bonds between carboxylate groups and solvent water molecules. The chains are joined by O-H…O and C-H…O hydrogen bonds to further expand into a three-dimensional structure. For 2, molecules of L in a ＂Z-shaped＂ conformation are linked by hydrogen bonds between carboxylate groups and aqua ligands to form a chain of loops running down the b axis. The （2D→2D） polythreading in compound 2 represents the mode of parallel interpenetration of 2D sheets, having polyrotaxane character.

关键词： 1,1′-(propane-1,3-diyl)dipyridinium-4-carboxylate polyrotaxane hydrogen bonding betaine derivative

Energy-efficient resource allocation for hybrid bursty services in multi-relay OFDM networks

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2017年第10期60卷 169-186页

作者： Yuhao ZHANG Qimei cui ning WANG Yanzhao HOU Weiliang XIE School of Information and Communication Engineering Beijing University of Posts and Telecommunications China Telecom Corporation Limited

In this paper, we propose mapped two-way water filling(MTWF) scheme to maximize energy efficiency(EE) for hybrid bursty services with quality of services(Qo S) requirements in two-way multirelay(TWMR) OFDM networks. The bursty traffic is first analyzed by strictly proved equivalent homogeneous Poisson process, based on which the Qo S requirements are converted into sum-rate constraints. The formulated non-convex EE maximization problem, including subcarrier assignment, relay selection(RS) and rate allocation, is NP-hard involving combinatorial optimization. To conduct optimal RS on each subcarrier without priori bursty traffic knowledge, we utilize some approximate relationships under high data rate demands to remove its dependence on two-way data rates, and simplify the whole optimization problem as well. After the optimal channel configuration is obtained, which only depends on channel conditions, subcarrier assignment is attained through elitist selection genetic algorithm(ESGA), and rate allocation of each service is fulfilled by deducing two-way water filling principle. A new equivalent optimization objective function is proposed next as the simple evaluating index in ESGA to reduce complexity. Finally, simulations are carried out to verify the superiority and convergence of our scheme, as well as the applicability for different scenarios.

关键词： energy efficiency resource allocation hybrid bursty services two-way multi-relay genetic algorithm

Social media and mobility landscape:Uncovering spatial patterns of urban human mobility with multi source data

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2018年第5期12卷 101-114页

作者： yilan cui Xing Xie yi Liu School of Environment Tsinghua UniversityBeijing 100084China Microsoft Research Asia Microsoft CorporationBeijing 100080China

In this paper,we present a three-step methodological framework,including location identification,bias modification,and out-of-sample validation,so as to promote human mobility analysis with social media *** specifically,we propose ways of identifying personal activity-specific places and commuting patterns in Beijing,China,based on Weibo(China’s Twitter)check-in records,as well as modifying sample bias of check-in data with population synthesis *** independent citywide travel logistic survey is used as the benchmark for validating the *** differences are discerned from Weibo users’and survey respondents’activity-mobility patterns,while there is a large variation of population representativeness between data from the two *** bias modification,the similarity coefficient between commuting distance distributions of Weibo data and survey observations increases substantially from 23% to 63%.Synthetic data proves to be a satisfactory costeffective alternative source of mobility *** proposed framework can inform many applications related to human mobility,ranging from transportation,through urban planning to transport emission modeling.

关键词： Social media Human mobility Population bias Sample reconstruction Data integration

Fermion superfluid with hybridized s-and p-wave pairings

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2017年第12期60卷 56-62页

作者： LiHong Zhou Wei yi XiaoLing cui Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Quantum Information University of Science and Technology of China Chinese Academy of Sciences Hefei 230026 China Synergetic InnovationCenter of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026 China

Ever since the pioneering work of Bardeen, Cooper and Schrieffer in the 1950 s, exploring novel pairing mechanisms for fermion superfluids has become one of the central tasks in modern physics. Here, we investigate a new type of fermion superfluid with hybridized s-and p-wave pairings in an ultracold spin-1/2 Fermi gas. Its occurrence is facilitated by the co-existence of comparable s-and p-wave interactions, which is realizable in a two-component 40 K Fermi gas with close-by s-and p-wave Feshbach resonances. The hybridized superfluid state is stable over a considerable parameter region on the phase diagram, and can lead to intriguing patterns of spin densities and pairing fields in momentum space. In particular, it can induce a phase-locked p-wave pairing in the fermion species that has no p-wave interactions. The hybridized nature of this novel superfluid can also be confirmed by measuring the s-and p-wave contacts, which can be extracted from the high-momentum tail of the momentum distribution of each spin component. These results enrich our knowledge of pairing superfluidity in Fermi systems, and open the avenue for achieving novel fermion superfluids with multiple partial-wave scatterings in cold atomic gases.

关键词： co-existense hybridized superfluid phase-locked contact

Multivariate statistical analysis for the surface water quality of the Luan River,China

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第1期10卷 142-148页

作者： Zhi-wei ZHAO Fu-yi cui State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 China

In order to analyze the characteristics of surface water resource quality for the reconstruction of old water treatment plant,multivariate statistical techniques such as cluster analysis and factor analysis were applied to the data of Yuqiao Reservoir-surface water resource of the Luan River,*** results of cluster analysis demonstrate that the months of one year were divided into 3 groups and the characteristic of clusters was agreed with the seasonal characteristics in North *** factors were derived from the complicated set using factor *** 1 included turbidity and chlorophyll,which seemed to be related to the anthropogenic activities;factor 2 included alkaline and hardness,which were related to the natural characteristic of surface water;and factor 3 included Cl and NO2-N affected by mineral and agricultural *** sinusoidal shape of the score plots of the three factors shows that the temporal variations caused by natural and human factors are linked to seasonality.

关键词： Surface water quality Cluster analysis Factor analysis Temporal variation of scores

New CFAR target detector for SAR images based on kernel density estimation and mean square error distance

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2012年第1期23卷 40-46页

作者： yi cui Jian Yang Xinzheng Zhang Department of Electronic Engineering Tsinghua University Beijing 100084 P. R. China Beijing Institute of Environmental Features Beijing 100854 R R. China

A new constant false alarm rate （CFAR） target detector for synthetic aperture radar （SAR） images is developed. For each pixel under test, both the local probability density function （PDF） of the pixel and the clutter PDF in the reference window are estimated by the non-parametric density estimation. The target detector is defined as the mean square error （MSE） distance between the two PDFs. The CFAR detection in SAR images having multiplicative noise is achieved by adaptive kernel bandwidth proportional to the clutter level. In addition, for obtaining a threshold with respect to a given probability of false alarm （PFA）, an unsupervised null distribution fitting method with outlier rejection is proposed. The effectiveness of the proposed target detector is demonstrated by the experiment result using the RADATSAT-2 SAR image.

关键词： synthetic aperture radar (SAR) target detection con- stant false alarm rate (CFAR).