Neumann

摘要： 软银拟收购WeWork联合创始人股份2月23日,美国共享办公空间供应商WeWork联合创始人Adam Neumann正与软银集团展开高级谈判。双方已接近达成和解,这或有助于WeWork第二次尝试上市。根据与WeWork联合创始人Adam Neumann现在正在讨论的和解条款。

摘要： We study when exchange rings are von Neumann regular. An exchange ring R with primitive factors Artinian is von Neumann regular, if the Jacobson radical of any indecomposable homomorphic image of R is T-nilpotent, and if any indecomposable homomorphic image of R is semiprime. Every indecomposable semiprimitive factor ring of R is regular, if R is an exchange ring such that every left primitive factor ring of R is a ring of index at most n and if R has nil-property.

摘要： Technology advances in the last a few decades have resulted in profound changes in our so~ciety, from workplaces to living rooms to how we socialize with each other. These changes in turn drivefurther technology developments, as the exponential growth of data demands ever increasing computingpower. However, improvements in computing capacity from device scaling alone is no longer sufficient, andnew materials, devices, and architectures likely need to be developed collaboratively to meet present andfuture computing needs. Specifically, devices that offer co-located memory and computing characteristics,as represented by memristor devices and memristor-based computing systems, have attracted broad interestin the last decade. Besides tremendous appeal in data storage applications, memristors offer the potentialfor efficient hardware realization of neuromorphic computing architectures that can effectively address thememory and energy walls faced by conventional von Neumann computing architectures. In this review, weevaluate the state-of-the-art in memristor devices and systems, and highlight the potential and challenges ofapplying such devices and architectures in neuromorphic computing applications. New directions that canlead to general, efficient in-memory computing systems will also be discussed.

摘要： 近日，鹿特丹港口管理局的企业社会责任项目经理Remco Neumann表示，鹿特丹港已经规划了未来的愿景，目标到2050年成为零排放港口。

摘要： We present fast fourth-order finite difference scheme for 3D Helmholtz equation with Neumann boundary condition. We employ the discrete Fourier transform operator and divide the problem into some independent subproblems. By means of the Gaussian elimination in the vertical direction, the problem is reduced into a small system on the top layer of the domain. The procedure for solving the numerical solutions is accelerated by the sparsity of Fourier operator under the space complexity of O(M3). Furthermore, the method makes it possible to solve the 3D Helmholtz equation with large grid number. The accuracy and efficiency of the method are validated by two test examples which have exact solutions.

摘要： Homogeneity analysis of the streamflow time series is essential to hydrological modeling, water resources management and climate change studies. In this study, five absolute homogeneity tests and one clustering approach were used to determine the homogeneity status of the streamflow time series(over the period 1960–2010) in 14 hydrometric stations of three important basins(i.e., Aras River Basin, Urmia Lake Basin and Sefid-Roud Basin) in northwestern Iran. Results of the Buishand range test, von Neumann ratio test, cumulative deviation test, standard normal homogeneity test and Pettitt test for monthly streamflow time series detected that about 42.26%, 38.09%, 33.33%, 39.28% and 68.45% of the streamflow time series were inhomogeneous at the 0.01 significance level, respectively. Streamflow time series of the stations located in the eastern parts of the study area or within the Urmia Lake Basin were mostly homogeneous. In contrast, streamflow time series in the stations of the Aras River Basin and Sefied-Roud Basin showed inhomogeneity at annual scales. Based on the overall classification for the monthly and annual streamflow series, we determined that about 45.60%, 11.53% and 42.85% of the time series were categorized into the 'useful', 'doubtful' and 'suspect' classes according to the five absolute homogeneity tests. We also found the homogeneity patterns of the streamflow time series by using the clustering approach. The results suggested the effectiveness of the clustering approach for homogeneity analysis of the streamflow time series in addition to the absolute homogeneity tests. Moreover, results of the absolute homogeneity tests and clustering approach indicated obvious decreasing change points of the streamflow time series in the 1990 s over the three basins, which were mostly related to the hydrological droughts.

摘要： In his famous thought experiment, Schr?dinger (1935) imagined a cat that measures the value of a quantum mechanical observable with its life. Since Schr?dinger’s time, no any interpretations or modifications of quantum mechanics have been proposed which give clear unambiguous answers to the questions posed by Schr?dinger’s cat of how long superpositions last and when (or whether) they collapse? In this paper appropriate modification of quantum mechanics is proposed. We claim that canonical interpretation of the wave function is correct only when the supports of the wave functions and essentially overlap. When the wave functions and have separated supports (as in the case of the experiment that we are considering in this paper) we claim that canonical interpretation of the wave function is no longer valid for a such cat state. Possible solution of the Schr?dinger’s cat paradox is considered. We pointed out that the collapsed state of the cat always shows definite and predictable outcomes even if cat also consists of a superposition: .

摘要： 本发明公开了基于Neumann随机有限元的机械零件模糊可靠度计算方法，考虑模糊因素影响，机械零件应进行模糊可靠性设计。本发明基于Neumann随机有限元，提出了机械零件模糊可靠度新的计算方法。该方法可以对复杂机械零件模糊可靠度进行计算。应用Neumann随机有限元求出机械零件所受应力的均值与方差。求出强度的均值与标准差。确定隶属函数。计算该模糊事件的失效概率。机械零件强度的模糊可靠度为R＝1‑Pf。

摘要： 本发明提出了基于Neumann随机有限元对齿轮箱进行优化设计的方法，对齿轮箱进行优化设计。核心方案为：建立优化数学模型，目标函数为齿轮箱中齿轮、轴的质量之和，计算齿轮弯曲疲劳强度的约束条件，轴强度的约束条件需要用到Neumann随机有限元，齿轮使用的网格采用二十节点六面体等参数单元，轴使用的网格采用轴对称四边形环形单元；采用惩罚函数法把约束优化问题转化为无约束优化问题，无约束优化问题采用Powell法求解；建立齿轮箱的优化数学模型，根据齿轮箱的优化数学模型。本发明的优化效果显著，齿轮箱质量下降，体积减小，原材料费用下降，提高了产品质量，使产品更具有竞争力。

摘要： 本发明公开一种针对北斗导航卫星系统D1导航电文中的Neumann‑Hoffman码规避与剥离方法，针对北斗导航系统D1导航电文信号体制中的Neumann‑Hoffman码(下简称NH码)编码特点，在卫星捕获阶段提出了一种基于概率统计的独特序列的NH码规避方法，成功规避掉NH码跳变对捕获的影响；并通过步长逐级递减的并行码相位搜索，成功实现北斗卫星扩频码相位和载波频率的精捕获；同时在帧同步环节提出了一种基于NH码和帧同步码(Pre)的组合码的NH码剥离方法，在子帧同步的同时可以有效实现NH码的剥离和导航电文的输出。本发明针对北斗导航卫星系统D1导航电文中的Neumann‑Hoffman码规避与剥离方法适合于北斗卫星导航接收机及软件接收机的应用，同样的思想适用于其它采用了固定序列二次编码的导航卫星系统。

摘要： 本发明公开了基于Neumann随机有限元的机械零件模糊可靠度计算方法，考虑模糊因素影响，机械零件应进行模糊可靠性设计。本发明基于Neumann随机有限元，提出了机械零件模糊可靠度新的计算方法。该方法可以对复杂机械零件模糊可靠度进行计算。应用Neumann随机有限元求出机械零件所受应力的均值与方差。求出强度的均值与标准差。确定隶属函数。计算该模糊事件的失效概率。机械零件强度的模糊可靠度为R＝1‑P

摘要： 本发明提出了基于Neumann随机有限元对齿轮箱进行优化设计的方法，对齿轮箱进行优化设计。核心方案为：建立优化数学模型，目标函数为齿轮箱中齿轮、轴的质量之和，计算齿轮弯曲疲劳强度的约束条件，轴强度的约束条件需要用到Neumann随机有限元，齿轮使用的网格采用二十节点六面体等参数单元，轴使用的网格采用轴对称四边形环形单元；采用惩罚函数法把约束优化问题转化为无约束优化问题，无约束优化问题采用Powell法求解；建立齿轮箱的优化数学模型，根据齿轮箱的优化数学模型。本发明的优化效果显著，齿轮箱质量下降，体积减小，原材料费用下降，提高了产品质量，使产品更具有竞争力。

摘要： 本发明公开一种针对北斗导航卫星系统D1导航电文中的Neumann-Hoffman码规避与剥离方法，针对北斗导航系统D1导航电文信号体制中的Neumann-Hoffman码(下简称NH码)编码特点，在卫星捕获阶段提出了一种基于概率统计的独特序列的NH码规避方法，成功规避掉NH码跳变对捕获的影响；并通过步长逐级递减的并行码相位搜索，成功实现北斗卫星扩频码相位和载波频率的精捕获；同时在帧同步环节提出了一种基于NH码和帧同步码(Pre)的组合码的NH码剥离方法，在子帧同步的同时可以有效实现NH码的剥离和导航电文的输出。本发明针对北斗导航卫星系统D1导航电文中的Neumann-Hoffman码规避与剥离方法适合于北斗卫星导航接收机及软件接收机的应用，同样的思想适用于其它采用了固定序列二次编码的导航卫星系统。