Results 31 to 40 of about 1,226,577 (254)
, 2020 [[abstract]]隨著全球暖化加劇，各國紛紛思考如何節能減碳，鑑於石化能源的仍具高度依賴性，找尋替代能源勢在必行。 核電雖然效能強大，但在日本311大地震後受到強烈的質疑，近年來太陽能、風力、水力、地熱等可再生能源逐漸受到重視 ...
魏之耕
core
Reconstructing Old Chinese *‐ts Using Han‐Time Material
Transactions of the Philological Society, EarlyView.Abstract Baxter & Sagart (2014b) reconstruct *‐Vt‐s on the basis of Middle Chinese reflexes in ‐jH (from some OC *‐s) coupled with either etymological or graphic connections to words in Middle Chinese ‐t. This approach, while perfectly sound, can suffer from lack of etymological or graphic data, leading to missed reconstructions. Since Old Chinese *‐ts
Julien Baley
wiley +1 more source
Inferring alternative ecosystem states with field survey data
Methods in Ecology and Evolution, EarlyView.Abstract Many ecosystems potentially exhibit alternative stable states, where distinct states can coexist under identical environmental conditions. While simulation models have generated key hypotheses in alternative stable states theory, they often rely on scale‐free parameters disconnected from real ecosystems.
Ning Chen +10 more
wiley +1 more source
Dianci bileiqi, 1994 不同烧成气氛条件下电瓷制品的烧成实验结果表明：含铁量较高、含钛量较低的电瓷制品，还原气氛下烧成制品的机械性能与电性能均优于氧化气氛下烧成制品的机械性能与电性能，而且在一定的还原烧成气氛浓度范围内，还原气氛浓度越高，制品的性能越好。研究结果还表明：适当提高电瓷制品氧化气氛烧成温度对制品的性能有利，但提高烧成温度而在氧化气氛下烧成制品的性能仍比不上较高还原气氛浓度下烧成制品的性能。
宛良德, 刘振群
doaj
Methods in Ecology and Evolution, EarlyView.Abstract Estimating wildlife population density is fundamental to ecology and conservation. While camera traps have revolutionized the monitoring of medium‐ to large‐sized mammals, estimating the density of unmarked populations remains a major challenge. Current models rely on a critical and often‐violated synchronized activity assumption.
Ryo Matsuoka +2 more
wiley +1 more source
When and why to give shorebirds a head start
Conservation Biology, EarlyView.Abstract Headstarting is a translocation technique involving the hatching or rearing of wild eggs or young in captivity and the release of those individuals back to the wild at or before independence. It has been trialed as a conservation intervention for shorebirds over recent decades to improve the population trend of target populations by increasing
Lynda Donaldson +4 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2022 为了研究腹板开椭圆孔耗能支撑的滞回性能，进行了3个支撑试件的低周往复加载试验，研究支撑长细比和耗能腹板长度对这种支撑耗能能力和滞回性能的影响，得到试件的滞回曲线、骨架曲线、刚度退化曲线、延性系数、等效黏滞阻尼比等。试验结果表明：在低周往复荷载作用下，腹板开椭圆孔耗能支撑依靠腹板开孔板件进入塑性耗散能量。耗能支撑滞回曲线饱满，耗能能力强，初始刚度较高。孔间板件断裂破坏导致耗能支撑试件失效，试件呈现延性破坏。试验过程中，中部工字钢保持弹性状态，没有进入塑性。相同长细比下耗能腹板的长度越长 ...
沈婷悦, 赵宝成
doaj
Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
wiley +1 more source
四川大学学报. 自然科学版, 1995 研究了一种新型的人工生物压电陶瓷复合种植材料─—ＨＡＢＴ生物压电陶瓷．对该种材料的压电性能、力学性能、热学性能、化学性能和生物学性能进行了初步考察和动物试验．结果表明，该材料既具有与人体组织相近的生物相容性和力学相容性，又具有相似于人体自然骨的压电性．该材料还能诱导骨组织的生长，符合生物安全性检测要求．
李继红 +4 more
doaj
Conservation Biology, EarlyView.Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta +24 more
wiley +1 more source