Results 101 to 110 of about 5,834,879 (181)

Insights for conservation from the Ecological Knowledge Games project

open access: yesConservation Biology, Volume 40, Issue 5, October 2026.
Abstract Environmental conservation research requires robust methods for collecting large‐scale behavioral data and engaging diverse stakeholders in decision‐making processes. We (Y.P., A.B.D., and N.B.) created EcoKnowGames (Ecological Knowledge Games), a transdisciplinary project that develops knowledge games for conservation science and data ...
Yuan Pan   +4 more
wiley   +1 more source

基于数学优化算法的多杂质用水网络优化综述

open access: yesGongye shui chuli, 2014
基于超结构的多杂质用水网络优化模型具有维数高、非线性和非凸性等特点,是目前节水技术研究的难点之一,数学优化算法是解决这一问题的主要工具。介绍了数学优化算法中的经典数学规划法、智能算法和智能混合算法解决多杂质水网络优化问题的研究进展。智能混合算法通用性高,较其他算法具有更强的全局和局部寻优能力,更适用于多杂质水网络的优化。开发智能混合算法,综合考虑换热网络和着眼企业现场条件是今后水网络优化研究的重点。
周枫, 徐宏勇, 蔡兰坤
doaj   +2 more sources

化学发光法与放射免疫法检测甲状腺功能亢进的比较

open access: yesZhongguo shiyan zhenduanxue, 2014
目的探讨电化学发光法与放射免疫法判断甲状腺功能亢进的效果差异,为临床甲亢的诊断提供参考。方法选择甲亢患者289例和健康对照组260例,分别运用化学发光法和放射免疫法对各样本的血清中FT3,FT4,TSH含量进行检测,分别比较两种检测方法甲亢组与健康对照组的检测值,并比较两种方法甲亢组FT3,FT4,TSH的临床诊断符合率。结果两种检测方法甲亢组FT3,FT4,TSH含量均高于健康对照组,但临床诊断符合率化学发光法优于放射免疫法。结论化学发光法临床诊断符合率高于放射免疫法。
雷萍, 罗红权, 李宁, 吴雨露
doaj  

沉淀反应与Liesegang Ring

open access: yes, 1997
沉淀反应与LiesegangRing惠建斌刘会洲吴瑾光(中国科学院化工冶金研究所北京100080)(北京大学化学与分子工程学院)沉淀反应是我们感到最熟悉的基本反应之一。例如用硝酸银溶液和可溶性氯化物,进行互相检验时,存在下列反应:Ag+(a)+Cl-..
惠建斌, 吴瑾光, 刘会洲
core  

Role of funders in embedding tests in conservation practice

open access: yesConservation Biology, Volume 40, Issue 5, October 2026.
Abstract Effective conservation practice requires decisions based on reliable and relevant evidence, but significant gaps in the evidence base exist. Incorporating well‐designed tests of the effectiveness of interventions for biodiversity in conservation projects is one of the best ways to scale up the rate of evidence generation.
Rebecca K. Smith   +28 more
wiley   +1 more source

基于强化学习的非玩家角色行为改进

open access: yes四川大学学报. 自然科学版, 2014
当前游戏中非玩家角色(Non-player Character,NPC)的行为主要基于随机决策或者传统的预定义行为决策,该方法的NPC不具有对游戏环境的自主学习能力.本文研究的目的是探索将强化学习方法应用于提高游戏NPC智能,使NPC在游戏过程中能实时地学习和适应演进的游戏环境,产生最合适的行为策略来响应玩家.本文提出一种动态训练强化学习的探索率参数方法,并将该方法应用于经典的Bomber Man游戏中.实验结果表明,该方法训练的NPC比非强化学习和传统强化学习训练的NPC具有更高的智能.
李炎武   +4 more
doaj  

Psychometric framework for coexistence with large carnivores

open access: yesConservation Biology, Volume 40, Issue 5, October 2026.
Abstract Human–carnivore coexistence is essential for biodiversity conservation, yet measuring the attitudes and behaviors that support it remains methodologically challenging. We developed psychometric scales to assess willingness to coexist with carnivores and the underlying beliefs of this coexistence through an iterative expert elicitation process ...
Benjamin Ghasemi   +14 more
wiley   +1 more source

加氢催化剂的器外预硫化方法

open access: yes, 2009
一种加氢催化剂的器外预硫化方法,其采用硫代乙酰胺(CH3CSNH2)为硫化剂预处理氧化态的加氢催化剂。所述加氢催化剂主要用于处理烃类原料。该硫化剂可以单独使用,也可以与其它硫化物联合使用。本发明所使用的硫化剂成本低,可解决目前有机硫化剂生产成本较高的问题;另外,该工艺还具有制备方法和设备简单、污染小、易操作等优点,在上述优点的基础上使用本发明预硫化方法预硫化的催化剂可达到或超过操作复杂、成本昂贵的器内预硫化的效果,因此在加氢催化剂器外预硫化工艺中有广阔的应用前景 ...
田志坚   +4 more
core  

Insights from three decades of IUCN Red List assessments catalyzing shark, ray, and chimaera conservation

open access: yesConservation Biology, Volume 40, Issue 5, October 2026.
Abstract The International Union for Conservation of Nature (IUCN) Red List of Threatened Species is a critical measure of global aquatic and terrestrial biodiversity status. It is also the basis for the Red List Index, which tracks extinction risk over time.
Brittany Finucci   +10 more
wiley   +1 more source

一种丹酚酸B化学对照品的分离制备方法

open access: yes, 2008
本发明涉及一种丹酚酸B化学对照品的分离制备方法。以重量含量10~ 97%的丹酚酸B提取物为原料,以制备型高效液相色谱为分离手段,以一定比例的甲醇-酸水溶液为洗脱体系,获得纯度大于98%的丹酚酸B化学对照品。工艺步骤有:样品预处理,色谱柱处理,进样,洗脱,在线检测,收集含有丹酚酸B的洗脱液,减压浓缩丹酚酸B洗脱液至无甲醇,冷冻干燥,即得丹酚酸B化学对照品。经高效液相色谱法检测,丹酚酸B的含量可达到98%以上 ...
肖红斌, 高明哲
core  

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