聚变能研究的良好近期前景

由于签署了一项有关国际热核实验反应堆(ITER)计划的协议,国际聚变能研究的近期前景呈现出比较乐观的局面。协议规定,欧共体、前苏联、日本和美国,在未来六年中将每年各提供7500万英镑(约1.3亿美元)。它们还将为这项计划制定一项工程方案,并组建一支由200名研究人员组成的核心队伍。ITER 的总投资额估计约为50亿英镑,前期工程将于92年在德国,美国加州和日本动工。这一消息是在经过一个聚变能研究前景不稳定的时期后发表的。

Oriented quantum coalgebra structure on the tensor product of an oriented quantum coalgebra with itself

Oriented quantum algebras （coalgebras） are generalizations of quasitriangular Hopf algebras （coquasitriangular Hopf algebras） and account for regular isotopy invariants of oriented 1-1 tangles, oriented knots and links. Let （H, or, D, U） be an oriented quantum coalgebra over the field k. Then （H×H, φ, D×D, U× U） is a trivial oriented quantum coalgebra structure on the tensor product of coalgebra H with itself, where φ （a × b, c × d） = σ-（ a, c）σ （b, d）. This paper presents the oriented quantum coalgebra structure （ H×H, σ, D×D, U× U） on coalgebra H× H, where σ（ a × b, c× d） = σ ^-1 （ d1, a1 ） σ（ a2, c1 ） σ^-1 （ d2, b1 ） σ（ b2, c2 ）. So a nontrivial oriented quantum coalgebra structure is obtained and it is dual to Radford＇s results in the paper ＂On the tensor product of an oriented quantum algebra with itself＂ published in 2007. Theoretically, the results of this paper are important in constructing the invariants of oriented knots and links.

搞活企业必须大力改革“三项制度”

云梦县粮食局曾霞明、余定汉在《云梦县粮油贸易公司盘活经营纪实》一文中指出:搞活企业,必须大力改革干部制度、用工制度和分配制度。文章说:云梦县粮油贸易公司仅76人,以往经营不善,亏损达26万元。今年以来,公司领导大力改革'三项'制度。

设计不规则田径跑道应尽量扩大半径的长度

不规则田径跑道是指第一道总长不足400米的跑道。按场地实际,第一道总长一般是设计成150米、200米、250米、300米等等。根据我们国家大多数学校的实际,要求每个中小学都有400米跑道标准的田径场是不现实的。除少数学校场地较优越外,大部份学校都只能按本身场地的条件,设计不规则田径跑道。标准的400米跑道半径是36米,不规则田径跑道半径都在36米以下,但尽可能不低于15米,在场地宽度允许的情况下,要尽量扩大半径的长度。计算跑道内突沿半径的R方法:

5年帮助500多名贫困学生——记四川省通江县涪阳镇小学柏江和他的爱心团队

从2010年至今,柏江和他的爱心团队共争取到500多万元的助学款,让通江县500多名贫困学生得到物质上的帮助和心灵上的抚慰。而柏江的电话号码则成为通江人的＂爱心热线＂,柏江已然成为通江助学的代言人。

The smash products of entwining structure

Let k be a commutative ring, C a projective k-coalgebra. The smash productsof entwining structure (A, C)_ψ are discussed. When the map ψ is a bijective, and C is a finitelygenerated k-module, a version of the Ulbrich theorem for coalgebras C is given.

极坐标系中的轴对称关系

本文只就在平面极坐标系中过极点的任意射线（包括特殊位置的射线在内）为对称轴时,已知曲线与其对应曲线对应点的坐标之间有何关系。其对称图形的方程如何求得作一简介:在整个探究过程中统设已知曲线上的点为M1（ρ1,θ1）,所求对称曲线上M1的对称点为M（ρ,θ）。按对称轴射线在极轴及其反向延长线的上方与下方我们分两种情况来研究。一、当对称轴θ＝（?）在极轴上方（含极轴）时:由于已知点M1（ρ1,θ1）的位置不同呈下面四种情况关于θ=（?）对称。

乐为城市添新绿

“谢谢老余,县委县政府一定高度重视,及时召开专题会议研究落实城市绿色发展。”这是大英县县委书记蒋喻新的批示。“他是我们离退休干部传递正能量的典范。”这是大英县县委老干部局局长的点赞。他就是大英县政协原副主席余定顺,今年67岁,现担任大英县关工委常务副主任。以笔献言呼吁绿色城市建设大英县曾经是一座古老的乡镇,为适应城市的发展,县委、县政府进行了重新规划和建设。2015年8月20日,

Duality theorem for smash coproduct over quantum groupoids

The duality theorem of generalized weak smash coproducts of weak module coalgebras and comodule coalgebras over quantum groupoids is studied.Let H be a weak Hopf algebra,C a left weak H-comodule coalgebra and D a left weak H-module coalgebra.First,a weak generalized smash coproduct C×lH D over quantum groupoids is defined and the module and comodule structures on it are constructed.The weak generalized right smash coproduct C×rL D is similar.Then some isomorph-isms between them are obtained.Secondly,by introducing some concepts of a weak convolution invertible element,a weak co-inner coaction and a strongly relative co-inner coaction,a sufficient condition for C×rH D to be isomorphic to Cv D is obtained,where v∈WC（C,H）and the coaction of H on D is right strongly relative co-inner.Finally,the duality theorem for a generalized smash coproduct over quantum groupoids,（C×lH H）×lH H≌Cv（H×lH H）,is obtained.

Quantum Secret Sharing Based on Chinese Remainder Theorem

A novel quantum secret sharing （QSS） scheme is proposed on the basis of Chinese Remainder Theorem （CRT）. In the scheme, the classical messages are mapped to secret sequences according to CRT equations, and distributed to different receivers by different dimensional superdense-coding respectively. CRT＇s secret sharing function, together with high-dimensional superdense-eoding, provide convenience, security, and large capability quantum channel for secret distribution and recovering. Analysis shows the security of the scheme.

Competition of Spatial and Temporal Instabilities under Time Delay near Codimension-Two Turing-Hopf Bifurcations

Competition of spatial and temporal instabilities under time delay near the codimension-two Turing-Hopfbifurcations is studied in a reaction-diffusion equation.The time delay changes remarkably the oscillation frequency,theintrinsic wave vector,and the intensities of both Turing and Hopf modes.The application of appropriate time delaycan control the competition between the Turing and Hopf modes.Analysis shows that individual or both feedbacks canrealize the control of the transformation between the Turing and Hopf patterns.Two-dimensional numerical simulationsvalidate the analytical results.

Threshold Ring Signature Scheme Based on TPM

The conventional ring signature schemes cannot address the scenario where the rank of members of the ring needs to be distinguished, for example, in electronically commerce application. To solve this problem, we presented a Trusted Platform Module （TPM）-based threshold ring signature schen. Employing a reliable secret Share Distribution Center （SDC）, the proposed approach can authenticate the TPM-based identity rank of members of the ring but not track a specific member＇s identity. A subset including t members with the same identity rank is built. With the signing cooperation of t members of the subset, the ring signature based on Chinese remainder theorem is generated. We proved the anonymity and unforgeability of the proposed scheme and compared it with the threshold ring signature based on Lagrange interpolation polynomial. Our scheme is relatively simpler to calculate.

Notes on Smooth Map Germs

In this paper,we study the determinacy of real smooth map-germs and obtain severalresults about the sufficient condition and necessary condition of a special determinacy .and aboutthe exact order to determinacy.We also obtain a result on the Zeeman's conjecture of smooth function-germs. This resultis a generalization of Siersma's lemma.

Design of novel sliding-mode controller for high-velocity AUV with consideration of residual dead load

This work focuses on motion control of high-velocity autonomous underwater vehicle(AUV).Conventional methods are effective solutions to motion control of low-and-medium-velocity AUV.Usually not taken into consideration in the control model,the residual dead load and damping force which vary with the AUV’s velocity tend to result in difficulties in motion control or even failure in convergence in the case of high-velocity movement.With full consideration given to the influence of residual dead load and changing damping force upon AUV motion control,a novel sliding-mode controller(SMC)is proposed in this work.The stability analysis of the proposed controller is carried out on the basis of Lyapunov function.The sea trials results proved the superiority of the sliding-mode controller over sigmoid-function-based controller(SFC).The novel controller demonstrated its effectiveness by achieving admirable control results in the case of high-velocity movement.

Micro-earthquakes “Just-underneath” Seismic Stations as Ground Truth Events——Application to the 2008 Wenchuan Aftershock Sequence

Analyzing the aftershock sequence of the 2008 Wenchuan earthquake,we considered 26 micro-earthquakes "just underneath" seismic stations.Making use of such special station-event configurations to determine the depth of these micro-earthquakes provided accurate relocation of aftershocks with a reference set of "ground truth(GT)events".

Research on stability of a slope due to underground mining

This paper will present a detailed analysis of the deformation mechanism and stability assessment of the slope through field investigations, numerical modeling and measurements. Field investigation indicated that three thin coal seams encountered large mined-out area at one side and free surface of hill slope at the other side, which lead to the caving of roof strata movement, ground movement and crown crack along the preferred orientations of joints. The three-dimensional numeri- cal modeling study on the case demonstrated that the plasticity failure occurred gradually along with the extension of mined-out area in depth. When the depth of mining reached the verge defined by the seismic prospecting method, a large mount of tension failure occurred on the crown of the slope. The factor of safety was 1.36 calculated by the shear strength reduction technique, which indicated the slope was in stable state. The measurement showed that the residual deformation occurred before 1998 and became stable subsequently, which indicated that the residual deformation almost finished and the slope is in stable state.

A Generalization about Congruent Pairs on a Set

In this paper,we cancel the condition of stable subsets of [1] and have got the same result with [1],we have also got some sufficient and necessary conditions about congruence of permutation group (G,T) is '= '.

The Linear Stability of a Solution of a Parallel Redundant Repairable System

In this paper,the solution of a parallel redundant repairable system is investigated.by using the method of functional analysis.Especially,the linear semigroups of operator theory on Banach space,we prove the existence of the strictly dominant eigenvalue,and show the linear stability of solution.

The Use of Analytic Hierarchy Process （AHP） in the Determination of Earnings Quality： The Case of UAE

The purpose of this study is to review and demonstrate how analytic hierarchy process （AHP） can be employed to determine earnings quality. The AHP technique can make the analysis studies more effective, easy, and applicable to companies to calculate the relative weights of each dimension, sub-dimension, and specific sub-dimension of earnings quality. A common understanding of earnings quality is difficult to define and even more difficult to measure precisely. In addition to this, the earnings quality is influenced by factors which are often intangible and immeasurable and, as such, when assessing earnings quality, judgments will be largely subjective. Further, earnings quality is related to business concepts or practices and affected by other factors such as the nature and source of earnings. In relation to this, earnings quality would be directly influenced by the conservatism of the chosen methods. However, earnings quality relates to the persistence of earnings and to the likelihood of cash realization on reported eamings. Overall, the results presented from the paramorphic model under AHP are meant to be descriptive of the decision process of five investment analysts within three different companies. The results in this study offer valuable insights into how a small population of investment analysts actually decides the relative importance of various earnings quality dimensions.

Normal Orthodox Semigroups with Inverse Transversals

A normal orthodox semigroup is an orthodox semigroup whose idempotent elements form a normal band. We deal with congruences on a normal orthodox semigroup with an inverse transversal. A structure theorem for such semigroup is obtained. Munn(1966) gave a fundamental inverse semigroup. Following Munn's idea, we give a fundamental normal orthodox semigroup with an inverse transversal.