What Is Information Sensitivity?

Sensitivity refers to the ability of the device, equipment or system to avoid performance degradation in the presence of electromagnetic disturbance; high sensitivity means low resistance to interference. Sensitivity (sensitivity) is a concept created by Joseph Nai and Keohan in the book "Rights and Interdependence" for analyzing international politics. It refers to the size and speed of the dependency effect. Used to describe how soon a change in one part of the system will cause other parts to change.

During the storage, transportation, and assembly of explosives, there are often compound scenes where explosives are exposed or have been exposed to high temperature conditions when they are constrained in a container and subjected to low-speed impact, which may cause the explosives to be accidentally ignited and then converted into more intense Deflagration or detonation caused a variety of accidents. For a long time, the impact safety and thermal safety of explosives have generally been studied separately. The Steven impact test is widely used to study the impact sensitivity of explosives, to determine the critical speed of explosives with metal shells constrained by low-speed impact of steel bullets. Idar et al. Carried out modified Steven experiments on high-energy explosives of different thicknesses, and proposed that there may be a general mechanism for the reactions caused by mechanical factors. Vandersall et al. Studied the impact of different shapes of bullets on explosive charges resulting in the crushing, puncture and penetration of the charge, and proposed several ignition mechanisms corresponding to the above, including friction, shear and strain. In terms of the thermal safety of explosives, the predecessors designed a variety of firing tests to observe the response of explosive charges and predict the behavior of explosives at high temperatures, providing useful information for the study of explosive thermal ignition. Both Steven's experiments and combustion experiments can facilitate the establishment of an initial database of numerical simulations. At present, research in these two aspects has clarified that the internal structure of explosives may change under impact or high temperature. Thermal damage and mechanical damage exist at both the micro and macro scales. Therefore, in the actual situation, that is, the thermal and mechanical recombination conditions, it is necessary to consider Thermal coupling effect. The military application of PBX high-energy explosives has caused its characteristics to be widely concerned. Its main components are explosive crystals and adhesives. The phase change of explosive crystals, the influence of endothermic or exothermic binders, and the huge difference between these two components make the damage mechanism of PBX explosives very complex, and experimental studies also show the thermal damage and impact sensitivity Complexity of relationships. Dickson et al. Proposed that the thermal and mechanical properties of PBX during thermal ignition are closely coupled to each other. Forbes and others at the LLNL laboratory tested the safety behavior of LX-04-01 and LX-17. The two explosives were subjected to impact tests at high temperatures of 170 ° C and 250 ° C. The results showed that Safety tends to decrease. Sandusky et al. Studied the impact safety of PBX-9502 at different temperatures and compared them with unheated scenarios. The results showed that the ignition threshold speed of explosives heated to 240 ° C was slightly reduced. ^[1]

Through the numerical simulation of HMX-based PBX explosives' low-speed impact experiments at different firing temperatures, the following conclusions can be drawn: The relationship between the impact of the explosive's ignition threshold speed and the firing temperature does not simply decrease with increasing temperature, but with The preheating temperature was first increased to a maximum value when the preheating temperature was 348.15K. At this time, the threshold speed was 360m / s, and then decreased at a higher preheating temperature. Numerical simulations reproduced the phenomenon in the experiment. As the preheating temperature rises, the location of the local high-temperature area shifts from the shear concentration on the surface of the explosive to the center where it is mainly compressed. Such a phenomenon may be caused by the decrease in the strength of the heated explosive, and the effect of compression on the temperature rise in the local high temperature region exceeds the shear effect. It can be seen that thermal softening plays an important role in the impact sensitivity of explosives. ^[2]

Sensitive politics

Sensitivity (sensitivity) is a concept created by Joseph Nai and Keohan in the book "Rights and Interdependence" for analyzing international politics. It refers to the size and speed of the dependency effect. Used to describe how soon a change in one part of the system will cause other parts to change. Sensitivity analysis is a commonly used method to study uncertainty in the economic evaluation of investment projects. Based on the deterministic analysis, it further analyzes the impact and degree of uncertainty on the final economic performance indicators of investment projects. Sensitive factors are generally selected for the analysis of main parameters (such as sales revenue, operating costs, production capacity, initial investment, life cycle, construction period, and production period). If a small change in a parameter can cause a large change in the economic effect indicator, this parameter is called a sensitivity factor, otherwise it is called a non-sensitivity factor.

Sensitive Medical Statistics

In medical statistics, any diagnostic indicator has two most basic characteristics, namely sensitivity and specificity. The so-called sensitivity refers to the chance (small) that it will not miss a diagnosis (false negative) when diagnosing a disease. ), The so-called specificity refers to how high (small) the chance of the indicator not being misdiagnosed (false positive) when diagnosing a disease. A single indicator, if it increases the sensitivity of its diagnosis, will inevitably reduce the specificity of its diagnosis, in other words, reducing missed diagnosis will necessarily increase misdiagnosis, and vice versa.

Sensitivity character analysis

Sensitivity analysis in character: In character, it can be considered as excessive attention to the feelings and changes brought by the details and good at magnifying it, and then respond accordingly. Sensitive people tend to be troubled by small things, and they can also be inexplicably happy for a small thing. It shows that the white point is that it is easier for sensitive people to go to their hearts. At the same time, sensitive people's minds are more delicate and meticulous, with strong insight.

Personality is not good or bad, you don't have to worry about it, just let it be. For some things, if you don't want to go to unreasonable gains and losses, you can use self-control to calm down. Everyone is blessed, and sensitive people have blessings that others do not have. Treat people more tenderly and sincerely, and know how to think differently. It's easier to see the beauty in life. Deeper thoughts and more creative in art. It is easier to produce sensitive people: people with disabilities, people with reduced mobility, writers, painters, poets, artists, journalists, actors, police.

Sensitivity psychoanalysis

In life, we often encounter people who are very suspicious, and they always feel that others are talking bad things behind themselves or doing bad things to themselves. Sometimes we also like suspicion ourselves. When we see others joking, we think that they are talking about themselves, and we are not happy. Those who like suspicion pay special attention to the attitude of the outside world and others towards themselves. One person's blurt-out sentence may be pondering for a long time and try to discover the "hidden lines", so that they cannot easily and naturally interact with people. Over time, not only do they feel bad, It also affects relationships. Suspicious people are usually too sensitive. Sensitivity is not necessarily a disadvantage. People who are sensitive to things are often aura and creative, but if they are too sensitive, especially when they are interacting with people, they need to find ways to control them. The method of self-suggestion is a method of exerting a positive influence on oneself, thereby adjusting the mood, situation, and strengthening self-awareness. When you discover that someone has some "suspicious" behavior, you should imply that you have to be calm, do a thorough analysis and understanding, and don't try to guess. If Dazhi does not have to worry about some details of his life, he can be confused, so that he can avoid his own troubles. There are no people who are not misunderstood in the world of open law. The key is to eliminate misunderstandings as soon as possible. If misunderstandings cannot be resolved as soon as possible, they will develop into suspicions; if suspicions cannot be resolved in time, misfortunes may result. So if possible, it's best to talk openly with the person you "skeptical" in order to clarify the truth and resolve misunderstandings. ^[3]