Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Abstract The continuous development of space exploration technology requires more efficient and economical space transport systems, and there is an urgent need for propulsion systems that are more efficient than chemical propulsion. Solar thermal propulsion (STP) systems have a relatively small size and high specific impulse, thus offering performance advantages in specific space missions. An STP system is generally composed of a concentrator, heat exchanger core, nozzle, and propellant supply system. The concentrator typically uses parabolic mirrors to concentrate sunlight to heat the heat exchanger core at a focal point. The propellant is heated when it flows through the heat exchanger core and is finally expanded and accelerated by a Laval nozzle to generate thrust. In this propulsion mode, the propulsion system can generate a Newton-level thrust by using an expandable whirling-membrane concentrator with an area of approximately 10 m 2 to collect solar radiation. Because hydrogen has a small molar mass and can generate a high exhaust velocity, it is an ideal propellant for solar thermal thrusters. The theoretical specific impulse of an STP using hydrogen as a propellant can reach 800 s. However, the low molar mass of hydrogen also reduces the thrust that the engine can provide, limiting the STP system to low-thrust space missions. The main applications of STP systems are orbit transfer and interplanetary exploration, which require a thrust level between 0.1 and 40 N. Figure 1.1 compares the thrust ranges and specific impulse ranges of several common propulsion methods. Chemical propulsion has a large thrust and a low specific impulse, and electric propulsion has a high specific impulse but a very small thrust. Within the size range of currently achievable spacecraft platforms, the specific impulse and thrust characteristics of STP systems are very attractive, and their high specific impulse and moderate thrust fill the gap between chemical and electric propulsion systems; as such, they are expected to be used to increase the payload ratio of orbital transfer vehicles (OTVs) or orbital maneuvering vehicles (OMVs).
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.003 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it