争王夺妻的狒狒(上)

在塞化格提野生动物保护区,住着许多群狒狒。每群狒狒一般都有几十只,多的达到100多只。它们过着严格的集体生活,组织性很强,每群都有一个"首领"。首领是由群体中身体最强壮、个头最魁梧。

Reflections on the Mechanism of Cooperation between China and Arab States

During the Cold War,China’s diplomacy failed to treat the Arab states as a whole.It was not until the end of the Cold War that China established diplomatic relations with all 22 Arab states.Since then,a multilateral cooperation mechanism between China and Arab states has come into existence and become steadily developed.In 2004,the China-Arab States Cooperation Forum was established.In 2010,China and the Arab states announced the establishment of a strategic cooperative relationship.After the Gulf War,the Arab world entered a period of fragmentation and division.The situation deteriorated after the drastic changes in the Middle East in 2011,to the point of entering an era of granulation.The ability of The League of Arab States to operate as a single international actor has been greatly impaired.In the era of the fragmentation of the Arab world,the mechanism of multilateral cooperation between China and the Arab States has developed in spite of these great difficulties.In future,the role and function of the multilateral mechanism of cooperation between China and the Arab states needs to be clarified,and efficiency needs to be improved based on the existing mechanisms.

Preparation of ultrafine silver powders with controllable size and morphology

The ultrafine silver powders were prepared by liquid reduction method using Arabic gum as dispersant.The effects of different dispersants,pH values,and temperature on the morphology and particle size of silver powders were investigated.It is found that Arabic gum can better adsorb on silver particles via chemical adsorption,and it shows the best dispersive effect among all the selected dispersants.The particle size of silver powders can be finely tuned from 0.34 to 4.09μm by adjusting pH values,while the morphology of silver powders can be tuned by changing the temperature.The silver powders with high tap density higher than 4.0 g/cm3 were successfully prepared in a wide temperature range of 21.8-70°C.Especially,the tap density is higher than 5.0 g/cm3 when the temperature is optimized to be 50°C.The facile process and high silver concentration of this method make it a promising way to prepare high quality silver powders for electronic paste.

Offline Arabic character recognition system

Several languages use the Arabic alphabets and Arabic scripts present challenges because the letter shape is context sensitive. For the past three decades, there has been a mounting interest among researchers in this problem. In this paper we present an Arabic Character Recognition system and review the theory behind the Arabic recognition system, the characteristics of Arabic writing, the sequence steps of recognizing Arabic text. These steps are separately discussed, and previous research work on each step is reviewed. Also in this paper we give some samples of Arabic fonts.

Precise asymptotics in the law of the logarithm for random fields in Hilbert space

Consider the positive d-dimensional lattice Z^d（d≥2） with partial ordering ≤, let {XK; K∈Z＋^d} be i.i.d, random variables taking values in a real separable Hilbert space （H, ｜｜·｜｜） with mean zero and covariance operator ∑ and set partial sums SN =∑K≤nXK,K,N∈Z＋^d. Under some moment conditions, we obtain the precise asymptotics of a kind of weighted infinite series for partial sums SN as ε↓ by using the truncation and approximation methods. The results are related to the convergence rates of the law of the logarithm in Hilbert space, and they also extend the results of （Gut and Spataru, 2003）.

Basic formation mechanisms of Lake Doroninskoye soda water, East Siberia, Russia

The primary scientific goal of studying salt lakes is to better understand the formation of small continental- type hydrogeochemical systems. Many scientists have attributed the metamorphism of the chemical composition of salt lakes to the evaporative concentration of water. How- ever, the formation of soda water is inconsistent with this hypothesis. Thus, analyzing intrabasinal biochemical pro- cesses and water--rocks interactions during the evaporative concentration of water allows us to understand the major mechanisms of the formation and evolution of water com- positions. Therefore, the aim of this paper is to identify the key processes involved in the formation of the chemical composition of the water in Lake Doroninskoye. An analysis of the distribution of major components shows that Na＋, HCO3-, CO32-, and C1- are dominant in this water. High concentrations of these elements are the result of evaporative water concentration. Calcium, magnesium, and potassium are not accumulated because the water is saturated in min- erals containing these elements. The main barrier to the growth of the sulfate content of water is sulfate reduction. This process also contributes to the additional reproduction of carbon dioxide, which reacts with the products of the hydrolysis of aluminosilicates OH- to form HCO3- and CO32-, thus further contributing to the natural processes of soda formation.

Uzbek ＂Makoms＂ in the 21 st Century

Meaning of the concept of＂makom＂ is hard to define with some frames and borders. Thus, German researcher Yu. Elzner provided more than 20 meanings of this word translated from Arabic. Music experts have decided in favor of the definition of word makom as ＂mode and genre＂. Establishment of makom as a genre had taken place approximately from 12th to 18th centuries. However, evolution of a mode system, had occurred much earlier. Makom art of Uzbekistan is a heritage, which had been formed over the long period. However, it has not yet reached its completion, it still keeps living and being filled with a new emotional mood, new image contents. Swift development of computer technology and communication means creates opportunities both for researchers and for performers to improve the phenomenon of the makom arts. Organization of various contests and festivals in Uzbekistan, makom performers＇ participation in foreign forums represents great incentives for showing the western interest in this arts and its integration into the global music science.

The Middle East and North Africa （MENA） Oil Exporters After the Global Crisis

Our research topic is about the economic situation in the Middle East and North Africa （MENA） oil exporters after the global crisis in 2008. The authors tried to find the answers to the questions such as ＂How bad or good is the situation there？＂ and ＂what is the expectation about the future of the region？＂ Like other countries around the world, the MENA oil exporters, comprised of Algeria, Bahrain, Iran, Iraq, Kuwait, Libya, Oman, Qatar, Saudi Arabia, Sudan, United Arab Emirates, Yemen were adversely affected by the global crisis. The MENA oil exporters are recently recovering from their recession in 2009 when the global crisis was felt intensively there. GDP in the region has grown by 3.5 percent in 2010 after a low growth of 0.7 percent in 2009. The average real GDP growth excluding Libya is projected to reach 4.9 percent in 2011. Two developments mark the outlook： the unrest in the region and the surge in global fuel and food prices. For most oil exporters, the expected increase in oil prices and production volumes will lead to higher growth in 2011 and stronger fiscal and external balances, notwithstanding recent increases in government spending. The oil exporters＇ combined external current account surplus is estimated to increase. The effects of the political events in Tunisia and Egypt have spread in varying degrees to the MENA oil exporters in the region, and many of these countries are responding with public spending and job-creation measures to alleviate social tensions. The social unrest also highlights the need to pursue fundamental economic reforms--social policy, fiscal management, governance, business environment, labor markets, and financial sector access to facilitate more inclusive economic growth. While the MENA countries are generally divided into two sub-regions such as ＂oil exporters＂ and ＂oil importers＂ in the economic literature, the authors will deal with only the MENA oil exporters in this work. The negative effects of the global crisis in these countries on growth, inflation, current account balance, budget balance, and finally financial sector will be reviewed in this work and the expectations and the developments which occurred after the crisis in these countries will be dealt with especially in the context of the IMF reports.

Hybrid Features for an Arabic Word Recognition System

This research proposes and implements an Arabic Sub-Words Recognition System （ASWR）. The system focuses on employing a combination of statistical and structural features to provide complete pattern＇s description and enhances the recognition rate. Support Vector Machines （SVMs） is utilized as a promising pattern recognition tool. In addition to that, the problems of dots and holes are solved in a completely different way from the ones previously employed. The proposed system proceeds in several phases as follows： （1） image acquisition, （2） binarisation, （3） morphological processing, （4） feature extraction, which includes statistical features, i.e., moment invariants, and structural features, i.e., dot number, dot position, and number of holes, features, and （5） classification, using multi-class SVMs and applying a one-against-all technique. The proposed system has been tested using different sets of words and subwords and has achieved a nearly 98.90% recogiaition rate. Comparative results with NNs are also presented.

Teaching Writing to EFL/ESP Arab Learners： A Socioculturally Based Approach

Teaching writing to Arab EFL learners in general, and to students who have never been exposed to an Anglo-Saxon foreign language in particular in institutions of higher education, through incorporating culturally meaningful learning materials, can actually be enjoyable and fruitful. However, it can also be very challenging given the sociocultural and linguistic background of the learners as well as other factors related to the nature of the imported teaching materials from overseas. The challenge then is identifying and selecting materials for each particular class, as well as how to get students motivated and successfully engaged in the process of writing. This paper enlightens educators and language programs managers and planners about the mechanism of the writing process while incorporating the cultural components relevant to the learner, as well as drawing their attention to the benefits of engaging students in the actual process of writing and boosting their motivation via a meaningful socioculturally based approach.

A Variety of Cultures Represented in English Language Textbooks： A Critical Study at Saudi University

Textbooks material is one of the important issues that are worthy to investigate in order to enrich student＇s engagement and interaction in EFL （English as a Foreign Language） classrooms. In this study, the author argues that textbooks materials used in academic institutions may well take a significant part in generating an active environment in EEL classrooms. It is believed that more opportunities will be created for students to be more involved, active, and able to understand the content being addressed more effectively. Yet, by looking at the textbooks being utilised （at a university context where the author teaches）, one can notice that student＇s culture （Eastern） is to a large extent missing in these textbooks, most of these books instead represent dominantly ＂Western＂ culture namely American and British cultures. This can deafly be depicted by topics discussed, pictures, clothing, names, and many other issues portrayed in these textbooks. This study is an attempt to challenge and problematize such domination of Western cultures portrayed in the content of English textbooks used in academic institutions not merely within Saudi Arabia but also extended to other countries and nations in the world.

Innovative Renewable Energy-Load Management Technology via Controlled Weight Motion

The paper presents an innovative renewable energy-load management technology, which is currently being developed as a prototype, in preparation for potential large-scale implementation in power systems. The new technology employs controlled motion of large weights, which are being maneuvered （up and down） through the system peak/off-peak demand pattern. The load management scheme is similar to the pumping storage systems, but uses large weights instead of water and, therefore, is more suited to the operating environment in Saudi Arabia, in which water is relatively scarce. A portion of the off-peak valley-filling energy is supplied from wind-driven generators, which adds to the green energy component of the scheme. The controlled motion aspect of the new technology is based on partial implementation of previously published ideas by the authors as well as a registered patent. The paper describes the theoretical and analytical features of the introduced renewable energy-load management technology, and dwells on its practical implementation features.

Transmission Mechanisms of Monetary Policy in Saudi Arabia： Evidence From SVAR Analysis

In this research, the authors evaluate different channels of the monetary policy transmission mechanisms in Saudi Arabia over the last 15 years with a baseline of structural vector autoregressive （SVAR） models. Contemporaneous coefficient in the structural model indicates that while Saudi Arabia pegs its currency to US dollar, monetary policy instrument reacts positively to unexpected changes in the monetary aggregate. In addition to the traditional interest rate channel, the authors have also found the effects of credit channel. Moreover, variance decomposition results show that past shocks of credit, nominal effective exchange rate （NEER）, federal funds rate （FFR） and treasury bill （TB） are found to be important for credit growth in shorter and longer horizons. The exchange rate channel has been less significant in comparison to other channels.

Conversion of One- to Two-Way Streets in Birmingham, Alabama

This paper summarizes the approach, findings and evaluation methodology for a study that investigated the feasibility and potential impacts of street conversion options on traffic operations in downtown Birmingham, Alabama. Of particular interest were issues related to conversion of grid systems from one-way to two-way operations. Recommendations on the most promising design and control configurations for implementation are also provided. A literature review was performed that threw light on the issues and challenges associated with implementation of street conversions, and the available best practices. A comprehensive traffic impact analysis that ensued employed the SYNCHRO computer simulation model to represent current and future operations so as to assess the implications of two-way conversions at and around the test sites. Detailed realistic two-way operations scenarios were developed that considered geometric and right-of-way restrictions, the location of land uses that generate and/or attract vehicular and pedestrian traffic, connectivity with the street grid, and accessibility to nearby freeway facilities, as well as practical concerns.

Neumann Boundary Conditions Inhibiting SSB in Coleman-Weinberg Mechanism

In this work we show that homogeneous Neumann boundary conditions inhibit the Coleman-Weinberg mechanism for spontaneous symmetry breaking in the scalar electrodynamics if the length of the finite region is small enough （a = e2Mφ-1, where M, is the mass of the scalar field generated by the Coleman-Weinberg mechanism）.

选用洗衣设备的几个问题

<正>目前洗衣机的铭牌能力与生产实际能力出入较大,且无统一计算方法.商业部召开的洗衣设备定型会上研究了一些国家的资料和我国的具体情况,为了统一口径,确定洗衣机的比容(即每10公斤干衣应占有的容积)为0.14～0.15米~3.可按此标准校核洗衣机的能力.

Understanding China Through Keywords

Learning keywords is one of the best ways to keep abreast of the latest developments in a country.The China Academy of Translation,a research institute affiliated with the China International Publishing Group,the country’s leading international publisher,regularly analyzes prevailing Chinese terms in various sectors and translates them into a number of foreign languages ranging from English to Arabic.

日德青岛空战

飞机诞生后很快就被用于军事，世界第一次飞要轰炸萌芽在1911年10月的意土战争中，意大利军队的加沃蒂少尉从飞机上向土耳其阵地投掷炸弹，被认为是飞机作战的开始。中国上空的第一次飞机作战行动当算1913年冬天北京政府派遣飞机侦察叛军。中国上空的第一次飞机空战发生在1914年，日英联军进攻德国占据的青岛，日德两军对阵的飞机在胶东上空遭遇，展开了空中格斗……

Effects of Momentum Ratio and Weber Number on Spray Half Angles of Liquid Controlled Pintle Injector

A pintle injector is advantageous for throttling a liquid rocket engine and reducing engine weight. This study ex- plores the effects of momentum ratio and Weber number at various injection conditions on spray characteristics of the pintle injector for liquid-gas propellants. A liquid sheet is injected from a center pintle nozzle and it is broken by a gas jet from an annular gap. The pressure drops of propellants, and the pintle opening distance were consi- dered as control variables; using 0.1 -1.0 as a bar for the pressure drop of the liquid injection, a 0.01-4）.2 bar for the pressure drop of gas jet and a 0.2 - 1.0 mm for the pintle opening distance. The discharge coefficient was de- creased linearly before the pintle opening distance of 0.75 mm and then, the coefficient was slightly increased. Spray images were captured by a CMOS camera with high resolution. Then, the shadow and reflected images were analyzed. Spray distributions were measured by a pattemator with an axial distance of 50 mm from a pintle tip. Finally, the spray half angles had an exponentially decreasing correlation as a momentum ratio divided by the Weber number. Also, the spray half angles from the spray distribution were underestimated compared to those measured from the captured images.

Sharp large deviation results for sums of independent random variables

We show sharp bounds for probabilities of large deviations for sums of independent random variables satisfying Bernstein's condition. One such bound is very close to the tail of the standard Gaussian law in certain case; other bounds improve the inequalities of Bennett and Hoeffding by adding missing factors in the spirit of Talagrand(1995). We also complete Talagrand's inequality by giving a lower bound of the same form, leading to an equality. As a consequence, we obtain large deviation expansions similar to those of Cram′er(1938),Bahadur-Rao(1960) and Sakhanenko(1991). We also show that our bound can be used to improve a recent inequality of Pinelis(2014).