The creation of solar steam generators with both high energy conversion efficiency and desired salt-resistant performance is essential for practical desalination. Herein, we report the first time fabrication polypyrrole-coated biomass porous foam as efficient generators. as-prepared foams possess a low thermal conductivity 0.022 W M–1 K–1 alkali-treated corn straw (CSA) 0.027 microwave- (CSMA). Based on their light absorption (95–100%), superhydrophilic wettability, excellent insulation,...

Solar-driven interfacial water evaporation has attracted increasing interest because of its high photothermal conversion efficiency. However, a big challenge still remains as salt crystallization is bottleneck issue that hinders their practical solar desalination applicability. Herein, we demonstrate strategy for construction salt-rejection steam generation system by designing migration device (MCD) using superhydrophilic carbonized green algae (SH-CGA) materials. By surface modification,...

This paper proposes an optimal day-ahead optimization schedule for gas-electric integrated energy system (IES) considering the bi-directional flow. The hourly topology of electric power (EPS), natural gas (NGS), hubs (EH) to (P2G) unit, are modeled minimize operation cost IES. Then, a second-order cone programming (SOCP) method is utilized solve problem, which actually mixed integer nonconvex and nonlinear issue. Besides, cutting planes added ensure exactness global solution. Finally,...

The development of a highly salt-resistant solar evaporator with long-term energy conversion is essential for practical desalination. Herein, we first report the ionic liquid-assisted alignment corn straw-based microcrystalline and oxidized cellulose preparation biomass aerogel (abbreviated as CSMCA CSOMCA) evaporators low tortuosity channels salt-assistance steam generation. By coating carbonized cornstalk nanoparticles onto CSOMCA light-absorbing layers (named C-CSMCA C-CSOMCA), light...

Acting as a key to future environmentally friendly transportation systems, electric vehicles (EVs) have attached importance develop fast charging technologies accomplish the requirement of vehicle users. However, behaviors would cause degradations in EVs' batteries, well negative effects like new demand peak and feeder overloads connected distribution network, especially when plugging large scale EVs. Decentralized coordination is encouraged our goal achieve an optimal strategy profile for...

The invention of solar steam generation has high energy conversion efficiency and long-term service cycle, which is crucial for the actual desalination sewage treatment. Herein, we first time report fabrication low-price, long-lasting, durable-based carbonized tofu (CT) as photothermal materials highly efficient generation. On account super-hydrophilic wettability abundant pore, CT shows good performance in transporting water rapidly, combined with its many characteristics such light...

The charging coordination of large‐scale electric vehicles (EVs) for avoiding the voltages at some nodes to drop below feasible ranges in distribution networks, which is formulated as a class optimisation problems with certain coupled constraints, studied. Then alternating direction method multipliers (ADMM) introduced obtain optimal strategies. However, due non‐separable property objective function includes non‐linear term total power EV populations, it difficult decentralise update step...

In order to solve the frequently occurred nonlinear working characteristics problem of devices in integrated energy system (IES), where this causes offset operation and design points those devices, paper, hierarchical multi-objective fuzzy collaborative optimization model IES under off-design performance is proposed. Firstly, high-order models performance, including fuel cell (FC), gas turbine (GT), absorption lithium bromide chiller (ABS), etc., are presented considering renewable...

The comprehensive utilization of multi-energy resources has been recognized as an effective way to improve the energy efficiency. This paper proposes a distributed double-side coordination framework minimize total system cost by optimizing supply hubs (EHs) and consumption consumers, considering tradeoff between fuel EHs satisfaction consumers. In this framework, consumers are modeled through standardized matrix modeling method applying which arbitrary combinations forms could be handled,...

The application of solar-driven interface evaporation photothermal materials in the complex water environment is facing great challenges, and development multifunctional significance to practical process. In this study, a new kind material was first prepared based on natural pumices, which shows advantages lightweight, superhydrophilicity, porous property, heat insulation. To improve its light absorption capacity photocatalytic effect, carbon Ag+ were uniformly loaded pumices (named...

The functionalities of microgrids are detailed and thereby expanded in active distribution systems. A versatile coordinated operation among multiple is proposed to facilitate the integration renewable energy sources (RES) modern grids. Particularly, meet requirements high penetration level renewables (e.g., photovoltaics small hydro), more than one networked controlled deployed simultaneously different locations a system. Therefore, local RES can be aggregated each microgrids. In order...

The charging behaviors of large-scale plug-in electric vehicles (PEVs) may negatively impact the power distribution networks by causing significant drop voltages. In this paper, we design a decentralized PEV coordination method based on so-called alternating direction multipliers (ADMM) to solve underlying optimization problems with non-separable objective function and coupled constraints. By applying proposed method, generic high-dimension complicated problem is solved in manner such that...

In order to suppress high mode self-oscillation in a gain amplifier, some special procedures, such as decreasing the coupling between beam and rf field forepart of are taken that tube works fully amplified state an operation range. simulation, output power is 1.7 GW with 7.5 kA at 750 kV when input 6.8 kW corresponding 53.9dB. Based on results from 2D PIC experiment performed Sinus accelerator. experiment, amplifier driven by 8 800 kV, maximum 2.04 62 kW; reaches 46.7dB reduces 39 kW, about...

Fuzzing is an efficient testing technique to expose bugs and vulnerabilities, fuzzers extended with coverage information can generate interesting results find potential in programs.However, previous coverage-based fuzzers, such as American Fuzzy Lop (AFL), fail realize the importance of order input test cases or they are unable adopt significant useful information, so some them suffer from dramatically poor performance.Meanwhile, main idea case prioritization (TCP) field software rank...

We have investigated the pulse shortening problem of relativistic klystron amplifier. It is shown that non-working mode self-excitation an important cause shortening. Theoretical and numerical analyses show mechanism caused by coupling between cavities. By use radio frequency absorbers, can be solved. In experiment, RF output power 920 MW, width device increased from 77 ns to 137 ns.

A new type of high power microwave device is developed based on bitron and backward wave oscillator. The composed two parts: the modulation cavity extraction (which similar to slow structure). acts as electron beam modulator reflector, which forms a resonator in combination cavity. modulated when it passes through cavity, generated An X-band designed for 20 GW accelerator, simulation results are frequency 8.25 GHz output 5.70 GW. Using superconducting magnet guiding magnet, 5.20 at...

Reasonable scheduling method is the key to realize safety and economic operation of active distribution network. Considering real-time volatility new energy generation such as wind or photovoltaic, control required during process. At present, network optimization has less research in terms covering various loads cold, heat electricity. On basis considering distributed generation, a layered coordinated proposed. The power layer responsible for supply important electrical loads, load regulates...

The coupling and complementary utilization of multiple energy sources is the basis structure optimization, accommodation renewable key issue in power system industry. In this paper, through cooperation gas turbine (GT) power-to-gas (P2G) equipment, an integrated natural electric (IGES) with bidirectional transmission constructed. used as peak shaving unit system, excessive wind accommodated by P2G, which converted into stored storage tanks (GST). contract model proposed to regulate GST...

With the continuous development of energy industry, contradiction between supply and demand is becoming increasingly serious. In order to coordinate power system distributed renewable energy, deal with many challenges brought by new system. We should fully exploit value benefits for users. this paper, a urban virtual plant proposed, which integrates generation units, storage controllable load. It uses advanced data communication coordinated control technology realize organic overall...

Coordination algorithms are needed for large-scale plug-in electric vehicles (PEVs) charging problems characterizing battery health and distribution transformer aging. It aims at achieving cost efficient safe operation without excessive centralization of control decisions. However, the presence transformers causes coupling among PEVs behaviors which brings challenge to make decisions in decentralization. To this end, paper presents an algorithm based on so-called alternating direction method...

This paper proposes a comprehensive optimization model that considers not only the economic dispatch (ED) of combined heat and power (CHP) units, but also demand response (DR) consuming units in energy management system, where each individual unit can exchange information with its neighbours. In this problem, there are balance constraints local constraints. Particularly, progresses CHP coupled through feasible polygon region constraint, demands consumer among different periods due to...