查询词典 convex

Some necesarry and sufficient coditions for generalized diagonal dominance for matrices are discussed by using the determinant and the closed convex cone generated by matrices column vectors. This paper, thus provides some new methoods for determining the generalized diagonal dominance in matrices.

利用矩阵的列向量所生成的闭凸锥及矩阵的行列式来讨论其行广义对角占优的若干充要条件，为判别矩阵是否为广义对角占优提供若干新方法。

Keywords Closed convex cone;gradient projection method;Least-squares solution;Inverse matrix problem;Inverse eigenvalue problem;Matrix completion problem;Optimal approximation

Article From 湖南大学；应用数学博士论文 2005年度闭凸锥；投影梯度法；最小二乘解；矩阵反问题；矩阵逆特征值问题；矩阵完全化；最佳逼近

Shaanxi-Ru 100 million construction and installation Decoration Engineering Co., Ltd. is engaged in building mechanical and electrical equipment installation, indoor and outdoor decoration, landscaping, fountain sculpture, construction steel, petroleum pipelines, corrosion insulation waterproofing, water and electricity HVAC, building curtain wall, intelligent engineering , communications equipment installation works, fire road traffic facilities and road roadbed, bridges and sports facilities, engineering design, construction, installation, construction decoration project budget and final accounts and audit preparation and audit consulting services, advertising, production and dissemination; Xi'an Highway Transportation Facilities Reflective signs of construction engineering, Xi'an, Xi'an, speed hump, protective Misnomer, Xian-chu, anti-collision warning, various traffic cone, wide-angle convex mirror, reflective vest, construction clothing, crash the water horse, contour standard, reflective spike , Anti-glare panels, bull barrel, triangle warning planes, the warning line, barrier tape, high-brightness lattice reflective film, parking locks, retaining wall protector, traffic Plum lights, traffic baton, reflective materials, hot melt crossed the road machine, Xi'an road cold spray liner machine, parking smart Barrier, Barrier intelligent toll station, as well as all levels of roads, community, school construction projects such as crossed.

陕西儒亿建筑安装装饰工程有限公司是从事建筑机电设备安装、室内外装饰装修、园林绿化、喷泉雕塑、建筑钢结构、石油管道、防腐保温防水工程、水电暖通、建筑幕墙、智能化工程、通讯设备安装工程、消防道路交通设施和公路路基路面、桥梁及体育场设施工程的设计、施工、安装，建筑装饰工程预决算与审计编制及审核咨询服务，广告设计制作与发布；西安公路交通设施工程部施工西安反光标志牌，西安橡胶减速带，防护隔离栏，西安防撞警示柱，各种交通锥，广角凸面镜，反光背心，施工服装，防撞水马，轮廓标，反光道钉，防眩板，防撞筒，三角警示架、警戒线、护栏带，高亮度晶格反光膜，车位锁，护墙角保护器，交通梅花灯，交通指挥棒，反光材料，道路热熔划线机，西安道路冷喷划线机，停车场智能道闸，收费站智能道闸，以及各级公路、社区、校园等划线施工工程。

We show that the joint total average cost curve is piece-wise convex.

其中我们证明得到联合总平均成本函数对时间T具有片段凸性的性质。

If the curve is convex, the highest point must be a tangency point with the budget constraint line.

如果是向原点凹的无差别曲线，那么切点并不是最优点。

The internal force yield condition is a close and convex curve and can correspond to the symmetry of internal force.

该内力屈服条件是一条闭合的外凸曲线，符合内力分量的对称性，在材料拉压强度相同时蜕化为屈雷斯卡内力屈服条件。

Under a given green split, the performance index of average delay in an intersection varies with the cycle in a convex curve.

在一定的绿信比下，交叉口的延误指标随周期变化具有单峰性。

The data of Monte Carlo simulated grains and pure iron show that the grain size is related to the face number by a curve convex upward.

仿真数据和纯铁实验数据均表明，晶粒尺寸与晶粒面数之间的统计关系表现为一条单调递增的凸曲线。

This paper first demonstrates that the changes of air parameters is indicated as a curve convex to the right in the psyehrometrie chart when the air flo ws through the surface air cooler in the cooling process.

本文首先论证了空气在表冷器中冷却过程的参数变化，在I——d图上表示的是一条向右凸的曲线。

Case study indicates that for a gas well with constant production rate, the relationship between the time of water breakthrough and the perforating degree assumes asymmetrical convex curve.

实例分析表明，底水气藏的一口生产井以定产量生产，在其它条件不变的情况下，其见水时间与气藏打开程度呈不对称凸型曲线关系。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。