摘要：This paper presents a new basis, the WSB basis, which unifies the Bemstein basis, Wang-Ball basis and Said-Ball basis, and therefore the Bézier curve, Wang-Ball curve and Said-Ball curve are the special cases of the WSB curve based on the WSB basis In addition, the relative degree elevation formula, recursive algorithm and conversion formula between the WSB basis and the Bern- stein basis are given.

摘要：利用TiH2粉末膏剂涂覆和在真空下1000或1400℃保温20 min的预处理工艺对反应烧结SiC陶瓷柱进行了表面预处理,再将预处理好的SiC陶瓷柱固定在石墨板上,随后采用金属浇铸工艺制备了一种具有高度陶瓷增强体宏观均匀性、可靠性和可设计性的SiC陶瓷柱阵列增强高铬铸铁复合材料。陶瓷涂层和复合材料界面分析表明:1400℃为较优的SiC表面预处理温度,预处理后SiC表面形成一层可靠的金属性复合层。该复合层在高温浇注过程中不会被溶解,可有效抑制高铬铸铁与SiC陶瓷的界面反应,从而形成无脱层、优良的复合材料陶瓷/金属磨损界面。与该复合材料的金属基体相比,由于SiC陶瓷柱的有效添加,经表面处理后不同陶瓷含量的SiC/高铬铸铁复合材料的耐磨性能均显著提高。

摘要：以机械设计方法学为理论基础 ,探讨了以改善作物生长的土壤物理条件为目标的地表覆盖种植技术工艺在种植业生产上的应用特点 ,进而阐述了自然环境 -地表覆盖层 -土壤 -作物系统中构建地表覆盖种植工艺的功能要求、交互作用要求、技术要求和操作要求 ,并根据各种要求的重要程度建立了满足要求的地表覆盖技术工艺的三级优先原则。以此为基础 ,研究了地表覆盖的部分功能以及部分功能的组合总体功能 ,并对其功能进行了检验分析。在列举可能作为地表覆盖材料的前提下 ,提出构建地表覆盖种植工艺的 5种方案 :农业生产废弃物覆盖地表 ,如碎秸秆、谷物颖壳和碎草等 ;不透光合成材料覆盖地表 ,如黑色沥青涂层纸和黑色塑料薄膜 ;透光合成材料覆盖地表 ,如各种无色塑料薄膜 ;无机地表覆盖材料 ,如细沙、砾石等 ;低矮活体植物生长条件下的地表覆盖 ,如苜蓿草和各种其它草类。根据覆盖方案的技术评价方法 ,建立了 10项指标的评价体系 ,并以 5级指标值为评价准则 ,对 5种覆盖方案进行了技术总值和相对价值的计算。在检验各种覆盖方案相对评价指标体系的部分值分布均衡性以及相对有效值大小的基础上 ,确定了农业有机废弃物覆盖地表的相对价值为 80 % ,是满足对作物生长土壤物理因素改善的较佳覆盖方案。研究过程所遵循?

摘要：核孔蛋白(Nucleoporins,Nups)是核孔复合体(Nuclear pore complexes,NPC)的重要组成成分,核孔复合体可以 控制细胞内信号分子在核质间的双向转运,从而控制基因表达、细胞增殖和分化。在构建的黄鳝精巢SMART cDNA文库 中,采用差异筛选的方法得到黄鳝核孔蛋白家族中Nup93基因的3′端片段,根据此段序列设计引物,使用兼并PCR和5′RACE 方法克隆得到此基因的全长cDNA。序列比对显示该基因与酵母Nic96、斑马鱼Nup93和人类Nup93的同源性分别为36．5％、 94．6％和90．5％。进化树分析显示,黄鳝Nup93与其他鱼类的Nup93归为一支。采用荧光定量PCR方法对不同性别黄鳝的 性腺和其他组织内该基因的表达作定量分析发现,Nup93在性腺和肾中的表达量远高于其他组织,而且表达量存在一定的 性别差异。这一结果提示Nup93可能与性腺发育相关。

摘要：Based on the cross-layer design, the power-optimization problem of Macro-Femto Heterogeneous Networks （HetNets） has been formulated. The constraints of power and re-source block allocation in the physical layer, delay and target data rate in the medium ac-cess control layer, urgent queue length in the network layer, and packet error rate in the transport layer, have been considered. The original problem is non-deterministic polyno-mial time hard, which cannot be solved practi-cally. After the restrictions of upper layers are translated into constraints with physical layer parameters, and the integer restrictions are relaxed, the original problem can be decom- posed into convex optimization subproblems. The optimal solutions of resource block allo-cation and power allocation can be obtained by using the Lagrangian optimization. Simula-tion results show that the proposed scheme is better than both the round robin algorithm and the max-rain one in terms of energy efficiency, throughput and service fairness. The round robin algorithm and the max-min one only focus on the user fairness rather than quality of service fairness. Compared to the round robin scheme （the max-min one）, the proposed scheme improves the energy efficiency 58.85% （62.41%）, the throughput 19.09% （25.25%）, the service fairness 57.69% （35.48%）.

摘要：背景:穿透性角膜移植后即使没有发生免疫排斥反应,植片内皮细胞密度也会以超生理的速度进行性下降,即发生植片内皮细胞慢性失功。目的:评价穿透性角膜移植后局部糖皮质激素眼液对植片内皮细胞慢性失功的影响。设计、时间及地点:临床对比分析,于2004-05/2009-05在同济大学附属同济医院眼科内实施。对象:穿透性角膜移植患者54例(54只眼)。方法:对穿透性角膜移植病例术后以妥布霉素地塞米松眼液治疗:6次/d,1个月;4次/d,2个月;2次/d,1个月,之后分为停药组和长期组。长期组以2次/d,再持续治疗直到术后12个月,停药组停止以任何激素或免疫抑制药物眼局部或全身治疗。主要观察指标:对患者内皮细胞密度进行随访,随访时间(3.12±0.28)年。结果:停药组和长期组在穿透性角膜移植后36个月内植片内皮细胞密度均有显著降低,内皮细胞密度在各随访时间点与前次随访结果相比均显著下降(P均0.05)。结论:局部糖皮质激素眼液治疗不能缓解植片内皮细胞慢性失功的进展速度。

摘要：本文处理了一类具与模式有关的时变时滞和 Markovian转换的不确定奇异随机系统的鲁棒H∞滤波问题.所考虑的系统包含参数不确定性,Markovian参数,随机扰动和与模式有关的时变时滞.本文的目的是设计一个滤波器以保证滤波错误系统是正则的、无脉冲的、鲁棒指数均方稳定的和可达到一个给定的 H∞扰动衰减水平.文章首先得到所求鲁棒指数H∞滤波器存在的充分条件,然后给出所求滤波器参数的显示表示.

摘要：The traffic equilibrium assignment problem under tradable credit scheme(TCS) in a bi-modal stochastic transportation network is investigated in this paper. To describe traveler’s risk-taking behaviors under uncertainty, the cumulative prospect theory(CPT) is adopted. Travelers are assumed to choose the paths with the minimum perceived generalized path costs, consisting of time prospect value(PV) and monetary cost. At equilibrium with a given TCS, the endogenous reference points and credit price remain constant, and are consistent with the equilibrium flow pattern and the corresponding travel time distributions of road sub-network. To describe such an equilibrium state, the CPT-based stochastic user equilibrium(SUE) conditions can be formulated under TCS. An equivalent variational inequality(VI) model embedding a parameterized fixed point(FP) model is then established, with its properties analyzed theoretically. A heuristic solution algorithm is developed to solve the model, which contains two-layer iterations. The outer iteration is a bisection-based contraction method to find the equilibrium credit price, and the inner iteration is essentially the method of successive averages(MSA) to determine the corresponding CPT-based SUE network flow pattern. Numerical experiments are provided to validate the model and algorithm.

摘要：China is the starting point and pioneer and driver of the Silk Road Economic Belt; Russia is located in the throat place of the belt; and India is at the joint of the belt and the Maritime Silk Road. China, Russia, and India as the BRICS countries are geo-connected, easy to reach a consensus because of their common and similar interests. The three countries also have common inherent demands and strategic directions： connectivity, complementarity, taking advantage of the great powers of Eurasia and sea-land compound, moving toward the grand trend of modern international economy and technology development. Promoting the construction of the Silk Road Economic Belt accords with their respective interests, and is their common interests, which decide that China, Russia, and India are the key factors and dominant forces in the construction of the belt.

摘要：使用循环伏安和交流阻抗技术研究了劳氏紫在纳米金和单双链DNA修饰的金电极表面的电化学行为.劳氏紫在纳米金和DNA修饰的金电极表面显示了良好的氧化还原电特性.纳米金在金电极表面的修饰改善了劳氏紫的氧化还原特性.循环伏安结果显示劳氏紫和双链DNA的作用比和单链DNA的作用更强,其结果使电位发生更大的正移并使氧化还原峰电流有所增大.劳氏紫和双链DNA的这种相互作用对于基因药物的设计有重要的意义.这种作用也被交流阻抗研究结果所证实.