Results 101 to 110 of about 4,158 (239)
基于较合理有效的气体渗碳工艺模型,深入研究了二维的齿轮气体渗碳的动力学和碳分布问题,所得出的实用性结论可供工程实际中制订齿轮气体渗碳工艺参考;进一步,还初步探讨了齿轮渗碳中的碳化物控制问题。
高新树, 董贵恒, 张志强
doaj
Explaining differences in policy learning in the EU "Fit for 55” climate policy package
Abstract Through learning, policy actors can maintain, reinforce, or revise their beliefs and positions about the design and outcomes of policies. This paper critically analyzes factors influencing policy learning by comparing policy processes of two EU laws of the recent “Fit for 55” climate package: (i) revised provisions on increasing energy ...
Fredrik von Malmborg
wiley +1 more source
Accurate monitoring and accounting of methane emission in underground coal mine [PDF]
Methane, the second most prevalent greenhouse gas globally, is characterized by its high global warming potential and short atmospheric lifetime. It is primarily emitted from sectors such as coal mining, oil and gas production, agriculture, livestock ...
Beijing XIE+7 more
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用INDO方法研究了氮杂与硼杂碳笼CnX(n=59,69;X=N+,B-)的电子结构和光谱,表明CnX与C60,C70相比将发生结构畸变,氮杂碳笼比硼杂碳笼稳定,C70中靠近极附近的两种C原子易被杂原子置换.本文在对电子跃迁进行理论指认的同时,讨论了光谱红移的原因.
TENGQi-wen(滕启文), WUShi(吴师)
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Tropical secondary forest at early sucessional stage had higher diamter growth rate and mortality rate, however, these forests also are more risked to droughts and high temperatures. Rising temperatures and more frequent droughts may decrease the carbon sink capacity of tropical forest ecosystems. Abstract Tropical forests are major carbon sinks on the
Sai Tun Tun Oo+11 more
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Research progress and future study of carbon emission reduction for UCG [PDF]
The integration of underground coal gasification (UCG) and carbon emission reduction is expected to become an excellent green energy technology during the transitional stage from the current to the arrival of carbon neutrality, and even play an important
Jun WANG+4 more
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作者收集和测量了大量的大型重载齿轮在渗碳淬火后发生的变形,通过统计分析和实验,摸索到大型重载齿轮渗碳淬火后产生变形的规律性,并对变形原因进行分析和讨论,提出了在冷却过程中相变的不均匀性和不同步性带来的影响。文章以矿井行星减速器齿轮为例,针对变形原因,提出了减少大型重载齿轮渗碳淬火变形的若干工艺措施,在实践中已经得到效果。
仲复欣, 朱建海
doaj
Rare-earth element carburization The new development of the caburization technology
渗碳过程中,稀土具有催渗和微合金化双重作用。加稀土可使渗碳速度提高30%。即使渗碳温度降低为860C-880C时,也可使渗碳周期与原工艺相当.加稀土高浓度渗碳后渗层中的碳化物为细小、弥散分布的颗粒状碳化物,渗层基体组织为板条马氏体+细片状马氏体.过共折层的晶粒度显著细化,机械性能大幅度提高.
朱法义, 闫牧夫, 刘志儒
doaj
Research on Carbon Emission Accounting and the "Dual Carbon" Transformation Path of Industrial Parks [PDF]
[Introduction] As an important carrier of China's industrialization and urbanization, industrial parks not only provide a large amount of infrastructure and public services, but also become the main source of carbon emission in China and an important ...
Jing XU+4 more
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钢铁行业作为中国制造业碳排放量第二大的行业,拥有较大的碳减排潜力。为便于相关部门对碳排放量进行监管和控制,展开碳排放量预测研究。以某炼钢厂为研究对象,首先,分析炼钢流程中的二氧化碳排放,确定了引起碳排放的10种能源物质,据此收集了炼钢厂 20 01—2023年的基础能源数据,依据碳排放核算方法由基础能源数据核算出碳排放量;其次,基于长短期记忆网络预测未来7年的碳排放量,训练误差和测试误差均接近0.01,实际误差为1 323 307.46 t二氧化碳,并与其他3种预测模型进行对比 ...
李凤云, 窦泽慧, 李朋, 郭威
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