Two-level Bregmanized method for image interpolation with graph regularized sparse coding

A two-level Bregmanized method with graph regularized sparse coding （TBGSC） is presented for image interpolation. The outer-level Bregman iterative procedure enforces the observation data constraints, while the inner-level Bregmanized method devotes to dictionary updating and sparse represention of small overlapping image patches. The introduced constraint of graph regularized sparse coding can capture local image features effectively, and consequently enables accurate reconstruction from highly undersampled partial data. Furthermore, modified sparse coding and simple dictionary updating applied in the inner minimization make the proposed algorithm converge within a relatively small number of iterations. Experimental results demonstrate that the proposed algorithm can effectively reconstruct images and it outperforms the current state-of-the-art approaches in terms of visual comparisons and quantitative measures.

窗和爱情(外二篇)

钱钟书《写在人生边上》又说:“一个钻窗子进来的人,不管是偷东西还是偷情。早巳决心来替你做个暂时的主人,顾不到你的欢迎和拒绝了。……从后窗进来的,总是女郎们把灵魂肉体完全交托的真正情人。” 是的,窗子和爱情的确大有关系.不能说从门口进来的一定没有爱情,但门和窗代表的爱情性质不同,门的爱情是礼数的,窗的爱情是奔放的,门的爱情厚实,窗的爱情轻灵,门的爱情拘谨,窗的爱情浪漫……

别搞“小圈子”

宋代欧阳修先生的著名政论文《朋党论》,阐述了一个重要观点：＂大凡君子与君子以同道为朋,小人与小人以同利为朋＂＂小人之所好者,禄利也;所贪者,财货也。当其同利之时,暂相党引以为朋者,伪也;及其见利而争先,或利尽而交疏,则反相贼害,虽其兄弟亲戚不能相保。＂意思是说,君子交朋友以同道为前提,小人交朋友以利益为前提。小人所爱的是薪俸,所贪的是钱财。

Study on the Edge Effect of Orthopteran Community in Ningxia Helan Mountain

[Objective] The study aimed to discuss the influences of edge effect on orthopteran community in east slope of Helan Mountain.[Method] Samples are collected by using sample zone method.The different species of orthopterans in different habitats are recorded.[Result] The percentage of Oedipodidae,Catantopidae and Pamphgidae in total are 42.65%,29.15% and 12.76% respectively.From scattered grassland interior to edge and then to desert grassland,abundance increase in turn,but diversity in the edge is the highe...

Energy-efficient Traffic Grooming Under Sliding Scheduled Traffic Model for IP over WDM Optical Networks

In this paper,we investigate on the problem of energy-efficient traffic grooming under sliding scheduled traffic model for IP over WDM optical networks,so as to minimize the total energy consumption of the core network.We present a two-layer auxiliary graph model and propose a new energyefficient traffic grooming heuristic named Two-Dimension Green Traffic Grooming(TDGTG) algorithm,which takes both space and time factors into consideration for network energy efficiency.We compare our proposed TDGTG algorithm with the previous traffic grooming algorithms for scheduled traffic model in terms of total energy consumption and blocking probability.The simulation results in three typical carrier topologies show the efficiency of our proposed TDGTD algorithm.

An improved linear dispersion codes transmission scheme based on OSIC detection

Linear dispersion codes (LDCs) were originally designed based on maximum likelihood detection. They do not have good performance when using ordered successive interference cancellation (OSIC) detection. In this paper,we propose a new improved linear dispersion codes transmission scheme to combat performance loss of original LDCs when using OSIC detection. We introduce an interleaver to each data substream transmitted over different antennas after LDCs encoder. Furthermore,a new computer search criterion for a linear transformation matrix is also proposed. New search criterion is to minimize the symbol error rate based on OSIC detection. Computer simulations show that the performance of proposed LDCs transmission scheme is better than the original LDCs.

Human interaction recognition based on sparse representation of feature covariance matrices

A new method for interaction recognition based on sparse representation of feature covariance matrices was presented.Firstly,the dense trajectories(DT)extracted from the video were clustered into different groups to eliminate the irrelevant trajectories,which could greatly reduce the noise influence on feature extraction.Then,the trajectory tunnels were characterized by means of feature covariance matrices.In this way,the discriminative descriptors could be extracted,which was also an effective solution to the problem that the description of the feature second-order statistics is insufficient.After that,an over-complete dictionary was learned with the descriptors and all the descriptors were encoded using sparse coding(SC).Classification was achieved using multiple instance learning(MIL),which was more suitable for complex environments.The proposed method was tested and evaluated on the WEB Interaction dataset and the UT interaction dataset.The experimental results demonstrated the superior efficiency.

Study of interaction between shock wave and unsteady boundary layer

This paper reports theoretical and experimental study of a new type of interaction of a moving shock wave with an unsteady boundary layer. This type of shock wave-boundary layer interaction describes a moving shock wave interaction with an unsteady boundary layer induced by another shock wave and a rarefaction wave. So it is different from the interaction of a stationary shock wave with steady boundary layer, also different from the interaction of a reflected moving shock wave at the end of a shock tube with unsteady boundary layer induced by an incident shock. Geometrical shock dynamics is used for the theoretical analysis of the shock wave-unsteady boundary layer interaction, and a double-driver shock tube with a rarefaction wave bursting diaphragm is used for the experimental investigation in this work.

A traffic model of optical networks based on time-space complexity and traffic grooming

This paper researched the traffic of optical networks in time-space complexity,proposed a novel traf-fic model for complex optical networks based on traffic grooming,designed a traffic generator GTS(gener-ator based on time and space)with 'centralized+distributed' idea,and then made a simulation in Clanguage.Experiments results show that GTS can produce the virtual network topology which can changedynamically with the characteristic of scaling-free network.GTS can also groom the different traffic andtrigger them under real-time or scheduling mechanisms,generating different optical connections.Thistraffic model is convenient for the simulation of optical networks considering the traffic complexity.

Traffic danger detection by visual attention model of sparse sampling

A method to detect traffic dangers based on visual attention model of sparse sampling was proposed. The hemispherical sparse sampling model was used to decrease the amount of calculation which increases the detection speed. Bayesian probability model and Gaussian kernel function were applied to calculate the saliency of traffic videos. The method of multiscale saliency was used and the final saliency was the average of all scales, which increased the detection rates extraordinarily. The detection results of several typical traffic dangers show that the proposed method has higher detection rates and speed, which meets the requirement of real-time detection of traffic dangers.

Connectivity of sparse vehicular ad hoc networks with channel randomness

In this paper, we investigate the connectivity of vehicular ad hoc networks in free-flow traffic situation with channel randonmess. In order to illustrate the realistic environment, we consider that vehicles are distributed in free-flow highway according to a Poisson point process, and signal propagation between connected vehicles is subjected to log-normal shadowing effects. We obtain the distribution of the space headway between successive vehicles and the distribution of signal coverage, which allows us to use the equivalent M/G/z~ queue theory to model the connectivity of VANETs in the form of average broadcast percolation distance and average number of connected nodes. Then, extensive simulation studies are conducted to evaluate the obtained results. The analytical model presented here is able to describe the impact of various system parameters, including traffic parameters and signal propagation parameters on the con- nectivity. We use our analytical results, along with the common signal propagation data, to understand impact of channel randomness on the connectivity of VANETs.

原群下

牛能触。虎能攫且噬。虫蛇毒物。能螫蠚以饱人之肤血。人不能也。然卒受制于人者人群而物不群也。夫牛知触。虎知攫且噬。虫蛇毒物。知螫蠚饱人之肤血。而独不知群者。则以触者。攫噬者。螫蠚者。利己而损物也。夫人则不触。不攫噬。不螫蠚。不利己损物矣。而亦有不能群者。则以利已损物之私。有甚于触者。攫噬者螫蠚者也。夫汉之党锢。唐之清流。宋之洛蜀朔三党。明之东林复社。可谓固有不私者矣。而卒不能以群群不群者。则又以君子恃其公。以决小人之私。而以公轧私也。盖小人之群。

广工,让我在磨练中成长

初到声华之友,以利相交,见利则争先,利尽交疏,道义之友,团结不懈,成则为周武三千,败则为田横五百,可常可变,可生可死。他日东西异地,南北异途,显晦异时,荣枯异遇,回忆东山风雨,渺若江河。——叶剑英毕业留言过完那个夏天,我们一帮高中同学,就真的东西异地、南北异途了,面我成为了叶帅言中的＂田横五百＂,来到大学城广工。初来乍到,我发现大学城一片荒芜,校园没有围墙,树木都是刚刚种下的,脆弱得仿佛一场风雨就可以把它们全部摧毁。陌生的环境使我内心极度消沉,就算军训嘹亮的军歌也唤不醒我沉寂的心,我本能的拒绝一切外界的事务。我听到各种不同的声音。有的人说大学成绩没什么作用,60分足矣;而过一会我又听到大学成绩很重要,直接关系到你日后就业或考研;还有的人说大学期间应该多参加各种活动。

Preparation and properties of physically and chemically cross-linked hybrid hydrophobic association hydrogels with good mechanical strength

To correct the defects of hydrophobic association hydrogels （HA-gels）, new physically and chemically cross-linked hybrid hy- drophobic association hydrogels （hybrid HA-gels） were prepared by radical copolymerization of acrylamide （AM）, octylphe- nol polyoxyethylene （n） acrylate （OPnAC, n stands for the number of ethoxy group, and is 10 and 21） and N,N＇-methylene- bisacrylamide （MBA）. On the basis of the statistical molecular theory of rubber elastic, the Mooney-Rivlin model and using the tensile true stress （O＇true） tested at room temperature, the number of network strands per unit volume （o~） and the num- ber-average molar mass of a network strand （Me） were evaluated for hybrid HA-gels. For the hydrogels, the effect of the con- tent of MBA and OP10AC on their tensile mechanical properties was studied by using o0 and Mc; also, the effect of the com- positions and temperature on their swelling behavior in distilled water was discussed in detail. In addition, hybrid HA-gels in- cluding a small quantity of MBA possessed the capabilities of secondary self-healing and remolding. In contrast with HA-gels prepared by the same compositions besides MBA, hybrid HA-gels showed good mechanical strength and long-term thermal stability in distilled water in the range of 25 to 80℃. Furthemore, hybrid HA-gels also avoided the self-deswelling behavior of HA-gels. The results show that the application fields of HA-gels will be greatly broadened after introducing a chemical cross-linking network.