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双语推荐：m

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对7年生杂交鹅掌楸进行间伐试验,结果表明,间伐2 a多后,在2 m×4 m、4 m×4 m和4 m×6 m 3个间伐密度中,2 m×4 m和4 m×4 m两者的胸径增长十分相近,为31.5%,密度4 m×6 m胸径增长最大,为45.4%,它与密度2m×4 m或4 m×4 m比较有44%的增长。
7 year-old Liriodendron chinense × L. tulipifera forests were thinned in three density of 2 m×4 m、4 m×4 m and 4 m×6 m, the result showed in 29 months of thinning that growth of diameter of trees with density of 2 m×4 m or 4 m×4 m is 31.5%, 45.4%with density of 4 m×6 m, growth of diameter of tree with density of 4 m×6 m is 44.1%more than that of 2 m× 4 m or 4 m×4 m.

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m-限制边割将连通图G分离成阶不小于m的连通分支,图G的最小m-限制边割所含的边数称为图G的m-限制边通度,记作λm(G).对于包含m-限制边割的连通图G,有λm(G)≤ξm(G)(m≤3);如果λm(G)=ξm(G),则称图G是极大m-限制边连通的.本文证明:当n≥7时,无向广义De Bruijn图UBG(2,n)是极大m-限制边连通的(m={2,3}).
An m-restricted edge cut is an edge cut of a connected graph that disconnects this graph into each components having order at least m.The minimum size m-restricted edge cut of graph G is m-restricted edge connectivity,denoted by λm（G）.It is known that λm（G） ≤ ξm（G） holds for graph G that contain m-restricted edge cut whenever m ≤ 3.Graph G is maximally m- restricted edge connected if λm（G）=ξ m（G）.In this paper,for some m = { 2,3},undirected generalized De Bruijn graphs UBG（2,n） are proved to be maximally m-restricted edge connected whenever n ≥ 7.

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M2M市场在未来几年拥有较大的增长空间，随着移动转售业务牌照的发放，M2M将成为虚拟运营商可以切入的具备潜力的市场领域之一。探讨M2M虚拟运营的商业模式，分析国际开展M2M虚拟运营的案例，并给出国内开展M2M虚拟运营的建议。
M2M has more market space for growth in the coming years, with the issuance of mobile resale service license, M2M wil become a potential market area where MVNOs can cut into. This article discusses the business model of M2M virtual operation, analyzes the international M2M MVNO business cases, and gives advices to MNOs and MVNOs on how to provide better M2M services in China.

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指出M2M是使用电信运营商提供的网络和业务支撑平台并提供给其他各种规模垂直行业的公共物联网,它是物联网应用的一个子集。M2M的主要技术包括Thingbased M2M技术、机器对机器直接通信技术和M2M通信网技术。M2M市场潜力巨大,但还存在很多不确定因素,需要我们开展更多研究。
M2M is a kind of IoT that supports al kinds of vertical industry applications that are based on a telecommunication network and a telecommunication service platform. M2M application is a subset of IoT applications. The main M2M technologies are thing-based M2M technology, technology for direct communication between machine and machine, and M2M communication network technology. The M2M market has great potential, but there is stil much uncertainty and more research needs to be done.

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文章研究了环 F2 m ＋ uF2 m 上的循环码与（1＋ u）‐常循环码之间的关系，其中u2＝0。利用 F2 m ＋ uF2 m到 F22m的Gray映射，确立了 F2m ＋ uF2m 上（1＋ u）‐常循环码的Gray像，由此证明了 F2m ＋ uF2m 上奇长度的循环自对偶码是类型Ⅰ码。
The relationship between cyclic codes and (1+ u)‐constacyclic codes over the ring F2m + uF2m is studied ,where u2 = 0 .The Gray images of (1+ u)‐constacyclic codes over F2m + uF2m are deter‐mined by using a map from F2m + uF2m to F22m .Further ,it is proved that cyclic self‐dual codes of any odd length over F2m + uF2m are Type I codes .

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台阶爆破的效果直接影响矿山整体效益。针对黄麦岭露天矿现阶段爆破生产效果不佳，成本偏高的情况，以大块率、根底率、松散系数、后裂距离、爆破振动、飞石距离、炸药单耗为评价指标，建立了基于层次分析法和灰色关联分析法的爆破效果评价模型。对于矿石选择了孔网参数为5 m ×3.5 m，5 m ×3.7 m，5 m ×4 m，5.5 m ×3.5 m，5.5 m ×3.7 m五种可行的方案进行了爆破试验，采用评价模型有效的进行了爆破效果评价。得出矿石的最优爆破参数为：孔网5 m ×3.7 m，底盘抵抗线3.7 m，单耗0.92 kg/m3。同理得出易爆、难爆废石的最优爆破参数分别为：孔网5.5 m ×3.8 m，底盘抵抗线3.8 m，单耗0.81 kg/m3；孔网5 m ×3.5 m，底盘抵抗线3.5 m，单耗0.97 kg/m3。优化后的爆破参数有效的改善了黄麦岭露天矿的爆破效果，大大降低了生产成本。
The effect of bench blasting influenced the mining overall benefit directly. Based on the poor blasting effect and the high cost of Huangmailing open-pit mine,the blasting effect evaluation model on analytic hierarchy process and grey correlation analysis method was established,including the boulder yield,the rate of roots,the coeffi-cient of loose,the distance of split,the blasting vibration,the distance of flying rocks and the specific charge. Five feasible blasting hole parameters as 5 m × 3. 5 m,5 m × 3. 7 m,5 m × 4 m,5. 5 m × 3. 5 m,5. 5 m × 3. 7 m were cho-sen in practical tests. The model was effective to evaluate the blasting effect and helpful to get the optimal blasting parameters with 5 m × 3. 7 m,bottom burden 3. 7 m and specific charge 0. 92 kg/m3 . The optimal blasting parameters of the soft and hard waste rock was 5. 5 m × 3. 8 m,bottom burden 3. 8m and specific charge 0. 81 kg/m3 . The opti-mized blasting parameters improved the blasting effect of Huang

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关于欧式空间子空间正交补的正交基的计算,本文提出比schmidt process简单的一种算法。在n维欧式空间中,我们取一线性无关组M={α1,…,αm},mn,用消元法求出与M正交的一向量β1,再由β1与M构造M1={α1,…,αm,β1},仿此,继续构造M2,…,Mn-m。由Mn-m={α1,…,αm,β1,…,βn-m}。我们得出子空间S=〈α1,…,αm〉的正交补是子空间T=〈β1,…,βn-m〉,且向量组{β1,…,βn-m}是T的正交基。我们称此消元法为迭代消元法,在此,它比schmidt process简单。特别,当m=1时,本文给出简单公式,直接写出正交补的正交基。
〔Abstract〕 In Euclidean space En let M={α1, …, αm}, m

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采用折光率法测定了三氯蔗糖m(醇)∶m(水)=1∶1、m(乙醇)∶m(水)=1∶3、m(乙醇)∶m(水)=3∶1、m(乙醇)∶m(乙酸乙酯)=1∶1、m(异丙醇)∶m(水)=1∶1这5种混合溶剂中的溶解度。通过经验模型和Apelblat方程对所测实验数据进行了关联,取得了较好的关联效果,平均相对误差小于7.5%,且经验模型优于Apelblat方程。实验得到的溶解度数据和关联结果对三氯蔗糖结晶工艺的研究具有较大的指导意义。
The solubilities of sucralose in m (ethanol)∶m (water)=1∶1,m (ethanol)∶m (water)=1∶3, m(ethanol)∶m(water)=3∶1,m(ethanol)∶m(ethyl acetate)=1∶1,m(isopropanol)∶m(water)=1∶1 were determined respectively by the refractive method.The data were well correlated respectively with the empirical model and the Apelblat equation,with the mean relative errors less than 7.5%.It shows that the empirical model is more suitable than the Apelblat equation.The experimental results and correlations obtained are useful to the industrial crystallization process of sucralose.

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对从新加坡引进的莫氏兰进行适应性栽培。筛选出Mokara Adisa、M.Red、M.Dinah Shore、M.Chittl Orange Spot、M.Chao Praya Gold、M.Chao Praya Boy、M.Chark Kuan Pink、M.Kitiya共8个适宜在海南省三亚市栽培的莫氏兰优良切花品种,并对莫氏兰优良品种的主要栽培技术进行介绍。
Mokara from Singapore was cultivated in Sanya of Hainan Province for adaptability study. The result shows that Mokara Adisa, M. Red, M. Dinah Shore, M. Chittl Orange Spot, M. Chao Praya Gold, M. Chao Praya Boy, M. Chark Kuan Pink and M. Kitiya have a better growth performance and cut flower qualities in Sanya, and introduced the cultivation technique of Mokara.

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在大田生产条件下,研究0.8m、1.0m、1.2m、1.4m种植行距对甘蔗新良种园林17号的生长效应,以期为该品种的应用推广提供参考。结果表明:园林17号在四种种植行距下均表现出较优的生长效应,蔗茎产量达到6.8 t~8.5t/667㎡、亩含糖量达到0.9 t~1.1 t/667㎡。蔗茎产量和亩含糖量的高低排序均为1.0m行距0.8m行距1.2m行距1.4m行距,但差异不显著。生长效应模糊综合评判结果,1.0m行距最优,其次为0.8m和1.2m行距,表现最差的是1.4m行距。在传统人工作业条件下,采用1.0m行距较易获得高产高糖,其次为0.8m行距和1.2m行距;采用1.2m行距有利于节本增效。1.2m、1.4m行距适宜机械化作业,但应适当增大下种量和提高成茎率,以增加有效茎数提高产量。
Under field conditions of production, research 0.8m, 1.0m, 1.2m, 1.4m growth effect of new varieties of sugarcane planting spacing garden on the 17th of expected to provide a reference for the application and popularization of varieties. The results showed that:17 garden planting spacing in four exhibited optimum growth effect .Cane production reached 6.8 t~8.5t/667 square meters, acres of sugar amounted to 0.9 t~1.1 t/667 m. Sort acres of high and low cane yield and sugar content are 1.0m spacing>0.8m spacing>1.2m spacing>1.4m spacing. But the difference was not significant Growth effect fuzzy comprehensive evaluation results, 1.0m spacing best, followed by 0.8m and 1.2m spacing, the worst performance is 1.4m spacing. In the traditional manual operating conditions, the use of 1.0m spacing easier to obtain high yield and sugar, followed by 1.2m to 0.8m spacing and line spacing;using 1.2m spacing conducive to efficiency of the section. 1.2m, 1.4m spacing suitable for mechanized operatio

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