Results 41 to 50 of about 27,443 (153)
Jixie chuandong, 2004 针对传统机械优化设计的局限性 ,提出模糊优化建模、模型转化、遗传算法 （GA）优化求解的新思路 ,并对叠簧弹性联轴器进行了基于GA的模糊优化设计。
郭卫, 赵栓峰, 杨桂红
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Accountability in Government Use of AI: Citizen Concerns and Preferences
Public Administration, EarlyView.ABSTRACT Government adoption of AI opens the “pandora's box” of accountability, a core aspect of public value. Despite the centrality of governmental AI accountability, citizens' concerns and preferences in holding governments accountable for AI usage remain poorly understood.
Naikang Feng, Yanto Chandra
wiley +1 more source
Democratic Values in Citizen Participation: What Citizens Prioritize in Participation
Policy Studies Journal, EarlyView.ABSTRACT Citizen participation is often initiated to strengthen democracy. While participatory innovations are typically assessed through normative frameworks emphasizing democratic values, little is known about which of these values are prioritized by citizens.
Take Sipma, Frank Hendriks
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Zhendong Ceshi yu Zhenduan面向组合式新概念飞行器领域的发展需要，提出了一种固定销式单体机翼的组合式飞行器设计方案，采用尺寸参数优化和稳健性拓扑优化方法，研究了在外载荷作用位置非确定条件下，单体机翼承力结构的最优构型设计。首先，建立单体机翼结构有限元模型，基于Navier‑Stokes方程和尺寸参数优化方法，分析了气动载荷下连接固定销的最优布局，固定销最大局部应力降低了6.30%；其次，采用变密度法对单体机翼进行稳健性拓扑优化，对优化结果进行参数化模型重构；最后，通过二次尺寸优化，完善了单体机翼最优承力结构设计 ...
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Jixie chuandong, 1997 本文运用可靠性设计理论和最优化设计技术，提出了２Ｋ－Ｈ行星齿轮减速器的可靠性优化设计方法；建立了可靠性优化设计数学模型；最后给出了优化方法和程序框图。
王剑彬
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World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Agricultural development initiatives in sub‐Saharan Africa have emphasized improved crop varieties as a pathway to food security, resilience, and rural poverty reduction. However, empirical evidence often focuses narrowly on plot‐level outcomes and overlooks whole‐farm effects and the substantial heterogeneity in farmers' management practices,
Kodjo Kondo +4 more
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Jixie chuandong, 1998 齿轮减速器的优化设计提高了设计的质量。但由于客观条件的千差万别，常常需要对不同设计要求的减速器进行优化设计。显然这是十分繁杂的工作。为了既能最大限度地满足不同设计要求的实际需要，又能简化其优化设计，本文以单级圆柱齿轮减速器为例进行优化设计，然后根据量纲理论，求出相似准则；通过简单的运算，将其优化设计参数转换为不同设计要求的其它齿轮减速器的优化设计中去。
韩复杰
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World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Prevailing levels of hunger, malnutrition, and food insecurity—driven by conflict, global economic crises, and ecological destruction—are threatening fulfillment of the right to adequate food. The integration of human rights in food systems policies can address these challenges; however, progress in the adoption of human rights–based ...
Ellen Johnson +4 more
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World Water Policy, Volume 12, Issue 4, November 2026.ABSTRACT Biochemical oxygen demand (BOD) remains a core indicator of organic pollution in freshwater monitoring, but its role in water policy and practice is changing as water‐quality assessment moves toward predictive, integrative, and decision‐support approaches.
Isadora Favero Roque Cenci +5 more
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Jixie chuandong, 2002 齿轮减速器的参数优化是一个常见问题。在建立了优化模型后 ,设计人员通常需找到合适的优化程序 ,否则 ,设计人员就必须自己编制优化程序。这是一件既费力又费时的事情。MatLab是一个面向工程的大型科学计算工具软件 ,它包含许多工具箱 ,优化工具箱是其中之一。本文首先建立了单级齿轮减速器的可靠性优化设计模型 ,然后描述了如何利用MatLab优化工具箱解决齿轮减速器的参数优化问题的具体方法。事实证明这是一个简单易行的有效的手段 ...
陈满意, 陈定方
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