基于自环的NO.7信令实现电话局间互通方案研究

NO.7信令网是电信网的重要组成部分,近年来在移动网、智能网等各种网络中也得到了广泛的应用。本文介绍了NO.7信令的结构,阐述了基于自环的NO.7信令实现电话局间互通的数据配置过程并对NO.7信令进行了解析。

基于自环的NO.7信令实现电话局间互通方案研究

NO.7信令网是电信网的重要组成部分,近年来在移动网、智能网等各种网络中也得到了广泛的应用。本文介绍了NO.7信令的结构,阐述了基于自环的NO.7信令实现电话局间互通的数据配置过程并对NO.7信令进行了解析。

Global Stability and Bifurcation Analysis of a Cholera Transmission Model

This paper investigates the stability and bifurcation phenomena of a cholera transmission model in which individuals who have recovered from the disease may become susceptible again.The threshold for determining disease prevalence is established,and the parameter conditions for the existence of equilibria are discussed.The Routh-Hurwitz criterion is applied to demonstrate the local asymptotic stability of equilibria.By utilizing composite matrices and geometric techniques,the global dynamic behavior of the endemic equilibrium is investigated,and the sufficient conditions for its global asymptotic stability are derived.Furthermore,the disease-free equilibrium is a saddle-node when the basic reproductive number is 1,and tthe transcritical bifurcation in this case is discussed.

不可不知的64条“象棋军规”

第42条准确计算发动攻击的基础象棋战术种类众多,千变万化,在复杂多变的形势下,棋手能否先于对方实施计划或发动攻击,往往是获取主动的关键,而准备的计算则是基础。例1如图1,红方先行。本局选自2019年辽宁省少年赛10岁组的一盘对局。

为业余棋手诊脉

强子迟出遭攻难守韩再鸣(先负)金永吉(2019年1月弈于哈尔滨)中炮过河车进七兵对屏风马高车保马红方韩再鸣,男孩,11岁,阿城象棋学校学员。黑方金永吉,男孩,11岁,五常市象棋学校学员。本局是2019年哈尔滨市象棋等级赛第三轮的对局,韩再鸣本次赛获得第七名,金永吉本次比赛获得第四名。

LOCAL BAGGING AND ITS APPLICATIONON FACE RECOGNITION

Bagging is not quite suitable for stable classifiers such as nearest neighbor classifiers due to the lack of diversity and it is difficult to be directly applied to face recognition as well due to the small sample size （SSS） property of face recognition. To solve the two problems,local Bagging （L-Bagging） is proposed to simultaneously make Bagging apply to both nearest neighbor classifiers and face recognition. The major difference between L-Bagging and Bagging is that L-Bagging performs the bootstrap sampling on each local region partitioned from the original face image rather than the whole face image. Since the dimensionality of local region is usually far less than the number of samples and the component classifiers are constructed just in different local regions,L-Bagging deals with SSS problem and generates more diverse component classifiers. Experimental results on four standard face image databases （AR,Yale,ORL and Yale B） indicate that the proposed L-Bagging method is effective and robust to illumination,occlusion and slight pose variation.

Search for circular and noncircular critical slip surfaces in slope stability analysis by hybrid genetic algorithm

A local improvement procedure based on tabu search(TS) was incorporated into a basic genetic algorithm(GA) and a global optimal algorithm,i.e.,hybrid genetic algorithm(HGA) approach was used to search the circular and noncircular slip surfaces associated with their minimum safety factors.The slope safety factors of circular and noncircular critical slip surfaces were calculated by the simplified Bishop method and an improved Morgenstern-Price method which can be conveniently programmed,respectively.Comparisons with other methods were made which indicate the high efficiency and accuracy of the HGA approach.The HGA approach was used to calculate one case example and the results demonstrated its applicability to practical engineering.

LoLocalized Spatial Soliton Excitations in(2+1)-Dimensional Nonlinear Schrdinger Equation with Variable Nonlinearity and an External Potential

We report on the localized spatial soliton excitations in the multidimensional nonlinear Schrodinger equation with radially variable nonlinearity coefficient and an external potential. By using Hirota＇s binary differential operators, we determine a variety of external potentials and nonlinearity coefficients that can support nonlinear localized solutions of different but desired forms. For some specific external potentials and nonlinearity coefficients, we discuss features of the corresponding （2＋1）-dimensional multisolitonic solutions, including ring solitons, lump solitons, and soliton clusters.

Anti-Inflammatory Activity of Ferruginol from Prumnupitys andina

Ferruginol, a phenolic diterpenoid, was isolated from Prumnupitys andina, a Chilean native plant, as the main compound. Ferruginol has displayed an interesting range of biological activities such as in vitro anti-inflammatory activity. Aim of this research is to evaluate the dermal anti-inflammatory activity of ferruginol, using in vivo models at first time. Ferruginol was subjected to topical assays for the inhibition of inflammation elicited by AA （arachidonic acid） or TPA （phorbol ester） in the murine model. The topical anti-inflammatory activity was evaluated in vivo using groups of 8 animals were treated with a single dose of ferruginol, equimolar doses with regard to the reference drugs, indomethacin and nimesulide. We showed a chemical data were consistent with a type-abietane diterpenoid known as ferruginol. Ferruginol showed topical anti-inflammatory activity at 21.0% and 20.5% in AA and TPA models, respectively. Our results provide data to support further investigations about ferruginol, a type-abietane diterpenoid, as a potential anti-inflammatory agent.

The Processualities of Literature

The objective of this paper is to demonstrate that the processual aspect of literary works of art deserves much more attention than it normally receives by readers, critics, and theorists. The most important reason for this is seen in the fact that texts since the advent of print culture have been disseminated and passed on in written form and that in the medium of writing the processual character of language is only insufficiently taken care of by a cultural convention of arranging and approaching the presented signs in an particular sequence. Whereas in an oral culture the dynamic processuality of a speech or recitation was directly experienced by the listeners, the spatial arrangement of signs in writing enables and even entices readers and critics to read this or that part of a written text in a sequence of their own making. What remains out of focus is that in doing so they miss the particular semantic profile and aesthetic character of the work as created by the author--a procedure particularly hurtful in the case of literary works of art. There is hope, however, that this will somewhat change by our moving towards a performance culture

Effective Seed Distribution Pattern of an Upward Shift Species in Alpine Tundra of Changbai Mountains

The vegetation of alpine tundra in the Changbai Mountains has experienced great changes in recent decades. Narrowleaf small reed(Deyeuxia angustifolia), a perennial herb from the birch forest zone had crossed the tree line and invaded into the alpine tundra zone. To reveal the driven mechanism of D. angustifolia invasion, there is an urgent need to figure out the effective seed distribution pattern, which could tell us where the potential risk regions are and help us to interpret the invasion process. In this study, we focus on the locations of the seeds in the soil layer and mean to characterize the effective seed distribution pattern of D. angustifolia. The relationship between the environmental variables and the effective seed distribution pattern was also assessed by redundancy analysis. Results showed that seeds of D. angustifolia spread in the alpine tundra with a considerable number(mean value of 322 per m2). They were mainly distributed in the low elevation areas with no significant differences in different slope positions. Effective seed number(ESN) occurrences of D. angustifolia were different in various plant communities. Plant communities with lower canopy cover tended to have more seeds of D. angustifolia. Our research indicated reliable quantitative information on the extent to which habitats are susceptible to invasion.

A Study of Space in the Novel Ragtime

The novel Ragtime, written by the contemporary American writer Edgar Lawrence Doctorow, imaginatively reconstructs the urban space in the Progressive Era. In the period of social transformation and change, all kinds of contradictions in New York City are becoming increasingly acute. The division of space reflects the power discourse of different classes, races, and genders. The connection, extension and expansion of space promote the features of urban modernity and open up new patterns of social behavior and opportunities for survival, but cannot fundamentally alleviate the capitalist crisis. Spatial layout and distribution of the city are not only the reflection of social relations, but also the ＂time capsule＂, bearing the history of the city, and the writing of space offers a mirror for the author＇s emotion and value judgment.

虚拟网业务演进思考

随着市场竞争的加剧，用户需求也日益增加。现有的虚拟网业务在用户业务提供、停、复话管理和流量统计上都缺乏手段，虽然广域虚拟网业务的应用在一定程度上解决了此类问题，但在资源浪费和局内虚拟网用户呼叫的处理上还存在着问题。为适应用户对业务的需求，结合固网智能化和软交换技术进行虚拟网业务的演进，是一个摆在语音业务维护者面前的新课题。

实战死活

激战至此，双方早已进入读秒，而下面的劫争将决定本局的胜负。然而，当黑217找劫时，白218竟然消劫了!瞬间，白左边大龙的生死就成为了关键，那么究竟是谁误算了呢？

A reliable power management scheme for consistent hashing based distributed key value storage systems

Distributed key value storage systems are among the most important types of distributed storage systems currently deployed in data centers. Nowadays, enterprise data centers are facing growing pressure in reducing their power consumption. In this paper, we propose GreenCHT, a reliable power management scheme for consistent hashing based distributed key value storage systems. It consists of a multi-tier replication scheme, a reliable distributed log store, and a predictive power mode scheduler （PMS）. Instead of randomly placing replicas of each object on a number of nodes in the consistent hash ring, we arrange the replicas of objects on nonoverlapping tiers of nodes in the ring. This allows the system to fall in various power modes by powering down subsets of servers while not violating data availability. The predictive PMS predicts workloads and adapts to load fluctuation. It cooperates with the multi-tier replication strategy to provide power proportionality for the system. To ensure that the reliability of the system is maintained when replicas are powered down, we distribute the writes to standby replicas to active servers, which ensures failure tolerance of the system. GreenCHT is implemented based on Sheepdog, a distributed key value storage system that uses consistent hashing as an underlying distributed hash table. By replaying 12 typical real workload traces collected from Microsoft, the evaluation results show that GreenCHT can provide significant power savings while maintaining a desired performance. We observe that GreenCHT can reduce power consumption by up to 35%-61%.

Spatiotemporal variation in leaf size and shape in response to climate

Aims Morphological variation of leaves is a key indicator of plant response to climatic change.Leaf size and shape are associated with carbon,water and energy exchange of plants with their environment.However,whether and how leaf size and shape responded to climate change over the past decades remains poorly studied.Moreover,many studies have only explored inter-but not intraspecific variation in leaf size and shape across space and time.Methods We collected>6000 herbarium specimens spanning 98 years(1910–2008)in China for seven representative dicot species and measured their leaf length and width.We explored geographical patterns and temporal trends in leaf size(i.e.leaf length,leaf width and length×width product)and shape(i.e.length/width ratio),and investigated the effects of changes in precipitation and temperature over time and space on the variation in leaf size and shape.Important Findings After accounting for the effects of sampling time,leaf size decreased with latitude for all species combined,but the relationship varied among species.Leaf size and shape were positively correlated with temperature and precipitation across space.After accounting for the effects of sampling locations,leaf size of all species combined increased with time.Leaf size changes over time were mostly positively correlated with precipitation,whereas leaf shape changes were mostly correlated with temperature.Overall,our results indicate significant spatial and temporal intraspecific variation in leaf size and shape in response to climate.Our study also demonstrates that herbarium specimens collected over a considerable period of time provide a good resource to study the impacts of climate change on plant morphological traits.

Adaptive subdomain integration method for representing complex localized geometry in ANCF

In this work,we propose incorporating the finite cell method(FCM)into the absolute nodal coordinate formulation(ANCF)to improve the efficiency and robustness of ANCF elements in simulating structures with complex local features.In addition,an adaptive subdomain integration method based on a triangulation technique is devised to avoid excessive subdivisions,largely reducing the computational cost.Numerical examples demonstrate the effectiveness of the proposed method in large deformation,large rotation and dynamics simulation.

No Spin-Localization Phase Transition in the Spin-Boson Model without Local Field

We explore the spin-boson model in a special case, i.e., with zero local field. In contrast to previous studies, we find no possibility for quantum phase transition （QPT） happening between the localized and delocalized phases, and the behavior of the model can be fully characterized by the even or odd parity as well as the parity breaking, instead of the QPT, owned by the ground state of the system. The parity breaking mentioned in our case is completely different from the spontaneously broken symmetry relevant to the conventionally defined QPT in previous studies. Our analytical treatment about the eigensolution of the ground state of the model presents for the first time a rigorous proof of no- degeneracy for the ground state of the model, which is independent of the bath type, the degrees of freedom of the bath and the calculation precision. We argue that the QPT mentioned previously appears due to incorrect employment of the ground state of the model and/or unreasonable treatment of the infrared divergence existing in the spectral functions for Ohmic and sub-Ohmic dissipations.

A local version of Hardy spaces associated with operators on metric spaces

Let （X, d, μ） be a metric measure space endowed with a distance d and a nonnegative Borel doubling measure μ. Let L be a second order self-adjoint positive operator on L^2（X）. Assume that the semigroup e-^tL generated by -L satisfies the Gaussian upper bounds on L2（X）. In this article we study a local version of Hardy space hi （X） associated with L in terms of the area function characterization, and prove their atomic characters. Furthermore, we introduce a Moser type local boundedness condition for L, and then we apply this condition to show that the space hzL（X） can be characterized in terms of the Littlewood-Paley function. Finally, a broad class of applications of these results is described.

Localization of gravitino field on f(R)-thick branes

In this paper, we consider the localization of a five-dimensional gravitino field on f(R)-thick branes. We obtain the coupled chiral equations of the Kaluza-Klein(KK) modes of gravitinos with the gauge condition Ψ_z= 0. The chiral equations of a gravitino's KK modes are found to be almost identical to those of the Dirac fermion. However, their chiralities are exactly opposite. The chiral KK modes of gravitinos could be localized in some types of f(R)-thick branes on introducing a coupling term. We investigate the localization of a gravitino on three types of f(R)-thick branes through a Yukawa-like coupling term with background scalar fields. It has been shown that all the KK modes of gravitinos cannot be localized in the pure geometric f(R)-thick branes by adding a five-dimensional gravitino mass term. However, for the f(R)-thick branes generated by one or two background scalar fields, only the left-or right-handed zero mode could be localized in the branes, and the massive KK resonant modes are the same for both left-and right-handed gravitinos despite their opposing chiralities. All these results are consistent with those of the five-dimensional Dirac fermion except their chiralities, which may be an important sign to distinguish the gravitino field and the Dirac fermion field.