Results 11 to 20 of about 1,238,718 (177)
Kongjian kexue xuebao, 2023 对空间中几十keV到几MeV的中能离子进行成分、能谱和角分布进行测量，具有重要的科学价值和应用意义。中国在载人登月等深空探测计划中明确提出了对中能离子的探测需求，但当前尚未掌握中能离子测量技术。本文提出了一种基于SEE TOF×E方法的中能离子探测器方案，方案包括复合材料二次电子薄膜、电极、位置灵敏MCP探测器和SSD等核心部件的设计，可同时实现对5个方向的中能离子和4个方向的中能电子的测量。结合目前空间粒子探测载荷可实现的硬件时间分辨率、能量分辨率和仿真计算结果，可以发现，该设计可以在40 keV~5
张 伟杰 +4 more
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He jishu正离子源加速器的绝缘支撑一般采用环氧树脂黏接方式或聚醚醚酮（Polyether Ether Ketone，PEEK）与氟橡胶密封结构，鉴于在未来核聚变堆工程的实际运行中，高能强流离子束注入会引发氚渗透及中子辐照问题。为此，本文开展了绝缘结构的优化设计，改为Al2O3陶瓷与金属密封结构设计，包括加速器主绝缘体、加速器绝缘体与法兰螺栓紧固连接等，来满足离子源运行对高压、机械强度和真空密封的要求。文中介绍了新加速器的结构设计，并对加速器开展了力学分析，得出抑制极绝缘与法兰连接面的螺栓所受的最大正应力为50 ...
李 浩 +6 more
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He jishu大功率射频（Radio Frequency，RF）离子源因其无灯丝寿命限制且无电极污染，成为中性束注入系统中实现稳态运行的理想选择。然而在RF离子源运行过程中，等离子体阻抗的动态变化可能导致反射功率增大，进而降低RF耦合效率，甚至损坏核心设备。为解决这一问题，设计了一种基于单片机的反射保护系统，通过高精度模数转换器（Analog-to-Digital Converter，ADC）实时监测反射功率、集成反射功率保护和尖峰脉冲屏蔽功能，利用中断实现快速响应，结合LabVIEW设计了远程监控界面 ...
齐 麒 +4 more
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Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil organic nitrogen (SON) transformation is critical for global nutrient cycling and ecosystem productivity, yet how its responsiveness to climate change differs across diverse land use types remains poorly resolved.
Xinyi Yang +10 more
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Journal of Analytical Psychology, EarlyView.Abstract This paper examines the concept of non‐understandable in psychotherapy, based on the author's own play therapy with a boy with mild ASD (autism spectrum disorder). ASD is considered to belong to an area beyond comprehension, as psychotherapy is often deemed ineffective for it.
Toshio Kawai
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Methods in Ecology and Evolution, EarlyView.Abstract Elliptic Fourier analysis (EFA) is often employed in geometric morphometrics (GM), but the normalization of elliptic Fourier descriptor (EFD) has persistently posed challenges for obtaining unique and comparable results, especially in the application of outline‐based GM methods, which limits the implementation in automated analysis of numerous,
Hui Wu +6 more
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Perceived costs as drivers of wildlife management preferences in rural Tanzanian communities
Conservation Biology, EarlyView.Abstract Effectively managing human–wildlife interactions is crucial for fostering coexistence on shared landscapes. Management options are most effective when aligned with the preferences of people directly affected by wildlife, yet little is known about how socioecological factors influence these preferences.
Christian Kiffner +10 more
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Uncovering correlates of decline and critical refuges for a threatened terrestrial mammal
Conservation Biology, EarlyView.Abstract Globally, the geographic ranges of numerous species are contracting. Identifying spatiotemporal patterns of threat impact can illuminate why species decline in some parts of their range but persist in others. We developed a correlative approach to identify species’ response thresholds and locate ecological refuge areas associated with ...
Natalya M. Maitz +5 more
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Emotion and the Advocacy Coalition Framework: An Affective Dynamics Perspective
Policy Studies Journal, EarlyView.ABSTRACT Despite extensive evidence that emotion and cognition are deeply intertwined, the Advocacy Coalition Framework (ACF) lacks an analytically independent emotional mechanism in its causal architecture—an omission that may be particularly consequential in policy subsystems structured around morally charged, identity‐laden policy disputes.
Moshe Maor
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Zhejiang Daxue xuebao. Lixue ban, 2022 为解决传统加热法合成异喹啉-离子液体存在的问题，开发了一种超声辅助合成异喹啉-离子液体的方法。通过异喹啉季铵化过程的对比研究，证明了该方法具有环保性强、产率高、反应时间短等优点。将其扩展至阴离子交换反应，发现超声辐射法有效促进了异喹啉溴化物与简单阴离子［N（CF3SO2）2］−和［PF6］−，以及与复杂阴离子2，4-二氯苯氧乙酸的阴离子交换反应。对所得到的异喹啉-离子液体进行了结构表征以及热行为和溶解度的研究和讨论。结果表明，所得液体具有良好的热稳定性，为快速、高效建立绿色多功能化离子液体库奠定了基础。
YINYang(尹洋) +6 more
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