The Survey of the fauna composition and group diversity of Qilihai was made from February, 2002 to February, 2003. The results show that 78 species of birds belonging to 23 families and 12 orders have been found. 40 species (51.28%) belong to Palearctis region,30 species(39.74%) belong to cosmopolition, and 7 species(8.97%) belong to the Oriental birds. 23 species(29.49%) are summer birds, 43 species(55.13%) are travelers, 4 species(5.13%)are winter birds, and 8 species(10.26%) are residents. The birds of land have the most important contribution to the group diversity in this area. In the limited time and space, the landscape diversity is the key factor controlling bird species diversity.
Objective To investigate species distribution and species composition on horseflies in 4 cities and counties of frontiers between Korea and Jilin province in China.Methods Using ox-trap method to collect hourseflies.Results 39 species of 5 genera of family Tabanidae have been recorded from 4 cities and counties of frontiers between Korea and Jilin province in China.The number of species in Hunchun,Tumen,Antu,Dunhua is showed as following: 31,27,24,28.The percentage of Hybomitra brevis,Atylous miser,(H.stigmoptera) of 39 species of collected horseflies is(20.5%),(15.6%),(14.1%),respectively.During active seasons,there was one peak for(H.stigmoptera)(in the middle ten days of June),(H.brevis)(in the middle ten days of June),Tananus pleskei(in the middle ten days of July),(A.miser)(in the middle ten days of August),and(A.rusticus)(in the middle ten days of August).Conclusion The predominant species were H.brevis,A.miserand H.stigmoptera in frontiers between Korea and Jilin province in China.The species composition of horseflies varied in different month.
This paper reviews the transformative shifts within China’s photovoltaic (PV) industry against the backdrop of a global pivot from fossil fuels to renewable energies, a transition underscored by the pressing demands of climate change mitigation. By systematically analyzing existing literature, this study captures the rapid advancements and dominant role of China in the global PV market, spurred by robust governmental support and technological innovation. It also identifies persistent challenges such as technological gaps, supply chain instability, and evolving regulatory frameworks. Key findings highlight the industry’s significant contributions to national energy security and its pivotal role in achieving China’s carbon neutrality goals. This research underscores the critical importance of the PV industry in steering global sustainable energy policies and practices.
As the steady-state analysis model of photovoltaic power plant is mainly used to study the power flow and steady-state conditions of photovoltaic power plant on the PCC voltage, no external disturbance of the power generation unit equivalent to constant power or constant voltage source, do not need to understand the battery components Conversion, inverter grid control, MPPT control and other detailed process. When the operating characteristics of the grid or the working environment of the PV power plant changes, such as the sudden short circuit of the power system line, the change of the lighting conditions of the power station, the output power and voltage of the PV array, the inverter current and so on, are no longer stable Value, so the photovoltaic power plant transient analysis need to build a detailed model of photovoltaic power plants to understand the PV array, inverter and other components of the dynamic response process has become particularly important.
Compressed air energy storage (CAES) system is a new type of energy storage system with characteristics of long-term performance, high efficiency, and safety. In recent years, adiabatic CAES technology has attracted extensive attention. In this paper, the thermal models and the solution processes of the CAES system are proposed, which are verified by the design and operating data of the adiabatic CAES project in Jintan, Jiangsu province. And then, according to the comparison of different CAES technology routes, this paper selects the 300MW medium temperature CAES system with rock cavern for analysis. With the project in Yongchun, Fujian province as an example, the optimal scheme is to select the expander inlet pressure of 17MPa and the inlet pressure variation range of 6MPa, and the thermodynamic processes and technical parameters of this scheme are analyzed. According to the analysis above, a preliminary design plan is obtained.
In response to the government's call and the rule of economy, it is necessary for paper mills to optimize the process technologies to achieve the win-win for both saving energy and making benefits. The Voith Paper comprehensive treatment technologies about process water and solid wastes were introduced, on the point of saving energy and cost, fully utilizing wastes.
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