当“班长”要坚持做到“三要三不要”

在计划经济向社会主义市场经济转轨的过程中,县委书记怎样当好“班长”,依靠和团结县委“一班人”.带领群众致富奔小康,这是一个值得认真研究的问题.我在实践中深深体会到,当“班长”要坚持做到“三要三不要”.一、要总揽不要包揽.就是既要全面掌握情况,总揽工作全局,抓大事,抓中心,抓重点、难点和薄弱环节;又不要事无巨细,包揽一切事务.

导读重点 辐射全篇——《全神贯注》教学指要

《全神贯注》是“九义”六年制第八册新入选的一篇讲读课文,它的重点段是第二自然段,写了罗丹全神贯注地修改女塑像的经过。教学中,可以充分借助“预习”“思考·练习”,采用“导读法”,去突出重点,突破难点,辐射全篇。

教会学生有序地思考

算式谜是小学课外教学中的一朵奇葩。它以其新颖的形式、独特的构思吸引着无数的小学数学爱好者。但由于其数量关系比较隐蔽,如果靠猜或凑有时虽然也能算出结果,但毕竟要花费大量的时间。

合二为一 巧求硬币

冬冬是个航模迷。今天,他看中了一架飞机模型,可是囊中羞涩,于是立刻回家筹钱。他翻出自己的储蓄罐,数了又数,还差二十几元钱。爸爸妈妈又没有下班,要是去晚了,被别人买走了怎么办呢？正当他像热锅上的蚂蚁时,贝贝回来了。冬冬见到了救星：＂姐姐,借点钱给我吧!＂贝贝询问了缘由,拿出储蓄罐,数了数,说：＂一共25元8角。＂

贝贝的逆转——目的揭示法应用一例

"今天是我从教生涯中最难忘的日子,因为一位曾经让我头痛得要爆炸的孩子,却让我感动得泪流满面。"我的QQ签名上至今还保留着这样一段话。这孩子为什么让我感动得泪流满面?故事还得从头道来。孩子名叫贝贝,她是一个很特别的女孩,身材高挑,皮肤白皙,从外貌上看她是一个讨人喜欢的女孩子。三年级时,我就开始在贝贝的班级任教英语,那时的贝贝活泼可爱,上课积极,除了有点被爸妈宠坏的小脾气外,没有什么好挑剔的,当时她是我非常喜欢的学生之一。令我印象深刻的是,那年教师节,贝贝和班上一名同学一起制作了一张卡片给我。卡片简单却充满温馨,尤其是贝贝写的那句话令我感动不已:"我们喜欢您,永不讨厌您!"

Phase Diagram for Ashkin-Teller Model on Bethe Lattice

Using- the recursion method, we study the phase transitions of theAshkin-Teller model on the Bethe lattice, restricting ourselves to the case of ferromagneticinteractions. The isotropic Ashkin-Teller model and the anisotropic one are respectivelyinvestigated, and exact expressions for the free energy and the magnetization are obtained. It canbe found that each of the three varieties of phase diagrams, for the anisotropic Ashkin-Tellermodel, consists of four phases, i.e., the fully disordered paramagnetic phase Para, the fullyordered ferromagnetic phase Ferro, and two partially ordered ferromagnetic phases 【 σ 】 and 【 σs】, while the phase diagram, for the isotropic Ashkin-Teller model, contains three phases, i.e., thefully disordered paramagnetic phase Para, the fully ordered ferromagnetic phase Baxter Phase, andthe partially ordered ferromagnetic phase 【 σs 】.

Minimax Estimation of the Function of Parameters in Normal Distribution

The estimation of the functionθ=exp{αμ+bσ2} of parameters (μ,σ2) in normal distribution N(μ,σ2) is discussed. And when the prior distributions ofμandσ2 are independent, under the loss function L(θ,δ)=(θ-1×δ-1)2, the Bayesian estimation and the existence and computing method on minimax estimation are deeply discussed.

Cause Analysis of Consumer‑Grade UAV Accidents Based on Grounded Theory‑Bayesian Network

In order to reduce the accident rate of consumer-grade unmanned aerial vehicles(UAVs)in daily use scenarios,the accident causes are analyzed based on the accident cases of consumer-grade UAVs.By extracting accident causing factors based on the Grounded theory,the relationship between these factors is analyzed.The Bayesian network for consumer-grade UAV accidents is constructed.With the Grounded theory-Bayesian network,the probability of four types of accidents is inferred:fall,air collision,disappearance,and personal injury.With the posterior probability of each factor being reversely reasoned,the causal chain with the maximum probability of each accident is obtained.After the sensitivity of each factor is analyzed,the key nodes in the network accordingly are inferred.Then the causing factors of consumer-grade UAV accidents are analyzed.The results show that the probability of fall accident is the highest,the fall accident is associated with the probabilistic maximum causal chain of personal injury,and the sensitivity analysis results of each type of accident as the result node are inconsistent.

Microsatellite-Centromere Mapping in Japanese Scallop(Patinopecten yessoensis) Through Half-Tetrad Analysis in Gynogenetic Diploid Families

Gene-centromere mapping is an essential prerequisite for understanding the composition and structure of genomes. Half-tetrad analysis is a powerful tool for mapping genes and understanding chromosomal behavior during meiosis. The Japanese scallop(Patinopecten yessoensis), a cold-tolerant species inhabiting the northwestern Pacific coast, is a commercially important marine bivalve in Asian countries. In this study, inheritance of 32 informative microsatellite loci was examined in 70-h D-shaped larvae of three induced meiogynogenetic diploid families of P. yessoensis for centromere mapping using half-tetrad analysis. The ratio of gynogenetic diploids was proven to be 100%, 100% and 96% in the three families, respectively. Inheritance analysis in the control crosses showed that 51 of the 53 genotypic ratios observed were in accordance with Mendelian expectations at the 5% level after Bonferroni correction. Seven of the 32 microsatellite loci showed the existence of null alleles in control crosses. The second division segregation frequency(y) of the microsatellite loci ranged from 0.07 to 0.85 with a mean of 0.38, suggesting the existence of positive interference after a single chiasma formation in some chromosomes in the scallop. Microsatellite-centromere distances ranged from 4 c M to 42 c M under the assumption of complete interference. Information on the positions of centromeres in relation to the microsatellite loci will represent a contribution towards the assembly of genetic maps in the commercially important scallop species.

Gauge Symmetry and Transverse Symmetry Transformations in Gauge Theories

The transverse symmetry transformations associated with the normal symmetry transformations are proposedto build the transverse constraints on the basic vertices in gauge theories.I show that,while the BRST symmetryin non-Abelian gauge theory QCD (Quantum Chromodynamics) leads to the Slavnov-Taylor identity for the quark-gluonvertex which constrains the longitudinal part of the vertex,the transverse symmetry transformation associated with theBRST symmetry enables to derive the transverse Slavnov-Taylor identity for the quark-gluon vertex,which constrainsthe transverse part of the quark-gluon vertex from the gauge symmetry of QCD.

Economic Viability of Production of Tree Parica （Schizolobium amazonicum Huber ex. Ducke） of Reforestation Project in the Municipality Paragominas-PA, Brazil

The objective of this study was to analyze the profitability of production Parica reforestation in the municipality of Paragominas-PA. The study was conducted in the municipality of Paragominas Messoregiao located in the northeast of Para. The basic data used in the economic evaluation of production of planting parica （costs and revenues） were derived from primary source through raising production cost of parica with farmers from the municipality, analyzing the period of production horizon of seven years. The discount rate chosen for economic evaluation was 10% per year. NPV （net present value） calculation IRR （internal rate of return）, BCR （benefit-cost ratio） and EP （break-even point）. To check the economic feasibility of producing parica the following criteria were used for economic analysis. The results for NPV, IRR and BC ratio were respectively of $495,970, 28.83% and 2.43. For EP （break-even point） the value of 41.08% was found, which demonstrates the minimum amount of production, so that revenue equals costs. Based on the results obtained, it was found that the reforestation model with parica proposed in this paper presents economically viable for deployment.

Inheritance Pattern of Microsatellite Loci and Their Use for Kinship Analysis in the Japanese Scallop Patinopecten yessoensis

The inheritance mode of seven microsatellite markers was investigated in Patinopecten yessoensis larvae from four con-trolled crosses,and the feasibility of using these markers for kinship estimation was also examined. All the seven microsatellite loci were compatible with Mendelian inheritance. Neither sex-linked barriers to transmission nor major barriers to fertilization between gametes from the parents were evident. Two of the seven loci showed the presence of null alleles in two families,suggesting the need to conduct comprehensive species-specific inheritance studies for microsatellite loci used in population genetic studies. However,even if the null allele heterozygotes were considered as homozygotes in the calculation of genetic distance,offspring from four families were all unambiguously discriminated in the neighbor-joining dendrogram. This result indicates that the microsatellite markers used may be capable of discriminating between related and unrelated scallop larvae in the absence of pedigree information,and of investigating the effective number of parents contributing to the hatchery population of the Japanese scallop.

Graph-based single-copy routing in delay tolerant networks

This paper presents a new graph-based single-copy routmg method m delay tolerant networks （DTN）. With time goes on in the networks, a DTN connectivity graph is constituted with mobility of nodes and communication, and a corresponding greedy tree is obtained using a greedy algorithm in DTN connectivity graph. While there are some bad nodes such as disabled nodes or selfish nodes in delay tolerant networks, the nodes can choose the next p^oper intermediate node to transmit the mes- sage by comparing the location of neighboring nodes in the greedy tree. The single-copy routing method is very appropriate for energy-constrained, storage-constrained and bandwidth-constrained applications such as mobile wireless DTN networks. We show that delivery ratio is increased significantly by using the graph-based single-copy routing when bad nodes exist.

贝贝的叛逃

午后的阳光懒懒地照着,知了不知疲倦地叫着,教室里同学们都昏昏欲睡,教室中间有一个人挺直身子,好像听得很认真,这个人就是贝贝。“贝贝,你来回答一下这个问题!”老师叫贝贝。贝贝无动于衷,头也没有动一下,目光仍锁定在黑板上,呆愣愣的,如雕塑一般。“贝贝!贝贝!贝贝!旁边的同学,叫一下贝贝!”老师的分贝明显提高了。

Fast integral equation solver for Maxwell's equations in layered media with FMM for Bessel functions

The paper presents a new fast integral equation solver for Maxwell＇s equations in 3-D layered media. First, the spectral domain dyadic Green＇s function is derived, and the 0-th and the 1-st order Hankel transforms or Sommerfeld-type integrals are used to recover all components of the dyadic Green＇s function in real space. The Hankel transforms are performed with the adaptive generalized Gaussian quadrature points and window functions to minimize the computational cost. Subsequently, a fast integral equation solver with O（N2zNxNy log（NzNy）） in layered media is developed by rewriting the layered media integral operator in terms of Hankel transforms and using the new fast multipole method for the n-th order Bessel function in 2-D. Computational cost and parallel efficiency of the new algorithm are presented.

A brief review on Majorana bound states in topological superconductors

Topological superconductivity has drawn much attention recently, and most interests are focused on the Majorana bound states existing at the edges of one-dimensional topological superconductors. These Majorana bound states are ideal platform for studying non-Abelian statistics. Meanwhile, they are proposed to be useful in quantum computation. In this review, we introduce the basic concepts and models in this area. We begin from the Kitaev model, which is the most concise model for one-dimensional topological superconductivity. Then, we discuss how to realize this model with spin-orbit coupling in realistic materials. Finally, we show some simple methods to detect the Majorana bound states and study their novel properties with the help of adjacent quantum dots.

ON THE ZEROS OF QUOTIENTS OF BESSEL FUNCTIONS

The paper studies the zeros of 2mIm/Im-1- (m+1)I1 /I0, where Im are the Bessel functions.

Network pharmacology-based strategy to investigate harmacological mechanisms of Isodon serra(Maxim.)Hara for treatment of inflammatory

Widely distributed in plants,ent-kaurane diterpenoids could reduce the incidence of inflammatory.The most important active ingredient of Isodon serra(Maxim.)Hara is ent-kaurane diterpenoids,which contribute to the anti-inflammatory pharmacological effects of Isodon serra.However,the ingredients,the active compounds,drug targets,inflammatory targets and exact molecular mechanism of Isodon serra in treating inflammatory are still unclear.The purpose of this study was to use the method of network pharmacological analysis to find the active compounds in Isodon serra.These active compounds match the library of ent-kaurane diterpenoids compounds we established,and we find all the eligible ent-kaurane diterpenoids compounds.Isodon serra related and anti-inflammatory targets were found and then combined to get intersection,which represented potential anti-inflammatory targets of active compounds in Isodon serra.Moreover,anti-inflammatory targets and active compounds targets protein-protein interaction network were merged to get the protein-protein interaction network intersection and core genes in anti-inflammatory target protein-protein interaction network.For the anti-inflammatory targets of Isodon serra,Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway analysis were executed to confirm gene functions of Isodon serra in antagonizing inflammation.Finally,TCMSP analysis identified 10 active compounds out of 48 ent-kaurane.The pathway analysis showed enrichment for different pathways like AGE-RAGE signaling pathway in diabetic complications,small cell lung cancer and human cytomegalovirus infection,which were all connected to inflammatory.On the whole,the proposed method clearly identified the ent-kaurane diterpenoids of Isodon serra and the results gave the active compounds of Isodon serra for the first time.The combining use of the qualitative analysis of traditional Chinese medicine(TCM)and network pharmacological methods could discover potential drug targets and reveal the biological process of TCM,which would open up a new approach in the study of TCM in future.

(n+1)-Dimensional Gravity Duals to Quantum Criticalities with Spontaneous Symmetry Breaking

We reexamine the charged AdS domain wall solution to the Einstein-Abelian-Higgs model proposed by Gubser et al. as holographic superconductors at quantum critical points and comment on their statement about the uniqueness of gravity solutions. We generalize their explorations from （3 ＋ 1）-dimensions to arbitrary n -b 1Ds and find that the n ＋1≥5D charged AdS domain walls are unstable against electric perturbations.