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Four years later, AI language dataset created by Brown graduate students goes viral（图）
人工智能 语言数据集 机器人 语言处理模型
2023/6/26
Thanks to the popularity of new AI-powered chatbots and technology, Brown alumni Aaron Gokaslan and Vanya Cohen are seeing newfound interest in their dataset replicating OpenAI’s language processing m...
Brown launches new initiative to galvanize research in sustainable energy technology（图）
可持续能源 净零碳能源 气候变化 能源科学技术
2023/6/26
The newly launched Initiative for Sustainable Energy will serve as a campus hub for driving technological advances in sustainable energy and preparing the next-generation of leaders in net-zero-carbon...
Guardrails needed for responsible deployment of AI, Brown researcher tells Congress（图）
人工智能 计算机科学 机器学习
2023/6/26
Speaking before a U.S. Senate committee on the risks and opportunities of artificial intelligence, computer scientist Suresh Venkatasubramanian urged lawmakers to establish regulations to govern AI-ba...
Are AI chatbots off the rails or doing just what they were designed to do? Brown expert explains（图）
人工智能 聊天机器人 计算机科学 机器学习
2023/6/26
As hosts of new AI-powered chatbots and technology become widely available, and questions surface on their limits and power, Brown scholar Michael Littman offers insights into a debate that will only ...
Brown scholars put their heads together to decode the neuroscience behind ChatGPT（图）
ChatGPT 神经科学 人工智能
2023/6/26
The Carney Institute for Brain Science brought together faculty who study different aspects of artificial intelligence to discuss what it has in common with human intelligence, and its implications fo...
Brown computer scientist aims to protect people in an age of artificial intelligence（图）
布朗计算机 人工智能 数据驱动
2023/6/26
Suresh Venkatasubramanian served as a White House advisor for the nation’s first “Blueprint for an AI Bill of Rights,” helping to develop a guide to ethical practices in an era of data-driven technolo...
改进的Hoek-Brown准则可以降低高围压下HB准则过高预测岩石三轴强度的偏差值。然而，该准则在实际应用中仍然存在局限：通过应用大量岩石三轴试验数据验证了该准则中岩石临界状态围压等于单轴抗压强度这个观点并不具有普适性，并得出该准则在围压高于岩石单轴抗压强度时对其预测的三轴强度与试验强度存在较大的偏差，而且该偏差随着围压的增大而增加。为克服改进的HB准则这个应用局限，通过应用岩石临界状态及岩石临界...
The brown recluse spider engineers extra-strong silk by spinning loops onto a flat strand
The brown recluse spider engineers extra-strong silk spinning loops flat strand
2017/3/14
It helps to know a little about the brown recluse to fully understand the discovery about what makes the silk of this particular spider so strong.An international collaboration between William & Mary ...
Extraction, Fractionation, and Chemical Characterisation of Fucoidans from the Brown Seaweed Sargassum pallidum
brown seaweed Sargassum pallidum fucoidan extraction cytotoxic activity
2016/12/9
The fucoidans were obtained by extraction with water and gradient precipitation with different concentrations of ethanol. The main structural characterisations and bioactivities were achieved. Four fr...
Hoek-Brown强度准则在岩石及岩体工程中得到了广泛的应用,而目前基于该准则建立起的弹塑性本构模型在理论上还存在着一些不足;考虑到不同围压条件下的岩石材料塑性形变发展特征,提出了基于分段隐式修正塑性势的塑性流动法则,解决了其它基于广义H-B准则所建立的本构模型中塑性流动方向不连续及需额外引入参数等问题;采用基于误差控制的改进欧拉中点积分算法,对该本构模型进行了数值实现并给出了单积分点层次的结果...
Professor Gordon Brown，Stanford School of Earth Energy & Environmental Sciences（图）
Professor Gordon Brown Stanford School of Earth Energy & Environmental Sciences
2015/6/3
Gordon Brown,Dorrell William Kirby Professor of Geology in the School of Earth, Energy & Environmental Sciences and Professor of Photon Science, SLAC National Accelerator Laboratory,Education:Ph.D., V...
Identification and classification of bulk paddy, brown, and white rice cultivars with colour features extraction using image analysis and neural network
stepdisc analysis HSI HSV back propagation algorithm, bulk images
2014/7/10
We identify five rice cultivars by mean of developing an image processing algorithm. After preprocessing operations, 36 colour features in RGB, HSI, HSV spaces were extracted from the images. These 36...
基于Hoek-Brown准则的深部煤层钻井坍塌压力弹塑性分析
Hoek-Brown准则 深部煤层 坍塌压力 弹塑性 塑性区半径
2013/4/22
利用三轴压缩实验确定了沁水盆地平定区块深部煤岩在高围压条件下的弹塑性特征。以Hoek-Brown准则为极限平衡条件，提出了基于工程允许塑性区半径的深部煤层井眼坍塌压力弹塑性计算方法，得到控制深部煤层井壁坍塌的主要参数：煤岩地质强度指标GSI值、非均匀地应力系数及工程允许塑性区半径。以平定区块PD-095井为例，分析了深部煤层坍塌压力弹塑性结果与弹性结果的差别，讨论了坍塌压力弹塑性结果随影响因素的变...
基于Hoek-Brown准则的深部煤层钻井坍塌压力弹塑性分析
Hoek-Brown准则 深部煤层 坍塌压力 弹塑性 塑性区半径
2013/12/4
利用三轴压缩实验确定了沁水盆地平定区块深部煤岩在高围压条件下的弹塑性特征。以Hoek-Brown准则为极限平衡条件，提出了基于工程允许塑性区半径的深部煤层井眼坍塌压力弹塑性计算方法，得到控制深部煤层井壁坍塌的主要参数：煤岩地质强度指标GSI值、非均匀地应力系数及工程允许塑性区半径。以平定区块PD-095井为例，分析了深部煤层坍塌压力弹塑性结果与弹性结果的差别，讨论了坍塌压力弹塑性结果随影响因素的变...
结合宁东矿区任家庄矿的生产实例，利用基于Hoek-Brown强度准则确定煤、岩体力学参数的方法，运用FLAC 3D软件模拟分析了任家庄矿3号和5号煤层开采中的矿压显现规律，并根据现场工作面巷道围岩应力和表面收敛监测结果，对比分析了数值模拟结果的准确性。研究发现：基于Hoek-Brown经验强度准则所确定的煤、岩体力学参数与标准煤岩样的实验室测定值有明显差异，两者间并非简单折减关系，而与岩体结构特点...