2.2.2. Metrics for the Emergence of Cluster Enterprises’ Capability for Basic Research
The idea of entropy was first introduced by Clausius, a key figure in thermodynamics, in 1865. The second law of thermodynamics, or the law of entropy increase, tells us that closed systems tend to become more chaotic and disordered over time as entropy rises. However, in open systems, entropy can be reduced when they interact with their environment. Negative entropy inputs from outside sources help these systems stay organized, coordinated, and adaptable. For example, organizational learning is one way that systems bring in negative entropy from their surroundings [
17,
18]. In this framework, information entropy, which measures a system's disorder, will increase or decrease depending on how orderly the system becomes over time. By tracking changes in information entropy, we can measure the strength of the emergence of an enterprise's basic research capabilities, which gives insight into how strong those capabilities are.
When companies use research resources, they deplete what's available, which increases entropy and lowers the system’s order. But, since enterprise clusters are open systems, they can share innovation outcomes, knowledge, and information both internally and with the outside world. This exchange, called entropy flow, helps the system become more organized. So, the total change in entropy in an open system is determined by the internal entropy generated and the entropy exchanged with the environment.
Using a method from previous research on entropy changes in insurance systems [
19], this study develops a four-part indicator system to measure the entropy of enterprise clusters' basic research capabilities. These indicators are based on the components of entropy change: external system support, external system pressure, resource consumption, and regeneration.
External system support refers to how outside systems help the enterprise cluster, while external system pressure looks at the pressure the cluster puts on those external systems. Together, these form the entropy exchange, which is the net effect of the interactions between the enterprise cluster and external systems.
On the other hand, when enterprise clusters use up internal resources like finances (primary resources), it results in resource depletion, meaning these funds can no longer support the system. However, clusters also have the ability to regenerate—patents, new products, and R&D successes bring in revenue that replenishes the system. This falls under system regeneration, and the combined result of resource depletion and regeneration makes up the system’s entropy generation.
The total change in a system’s entropy comes from the combination of entropy exchange and entropy generation.
Entropy in the system can be broken into two types: positive and negative entropy. Positive entropy comes from internal conflicts in the organizational processes between leading companies, partner firms, and research institutions. If positive entropy keeps rising, the system becomes less coordinated, less effective, and more disordered. This increase in positive entropy reduces the system’s emergence strength, acting as a negative indicator for the system’s overall score.
Conversely, when the system brings in negative entropy from the environment, it offsets the internal positive entropy, helping maintain order, coordination, and efficiency between companies and universities. This creates the system’s overall capabilities, forming its foundational research strength. As negative entropy increases, it boosts the system’s emergence strength, serving as a positive measurement indicator.
This study uses these principles to build an evaluation system for enterprise clusters' research capabilities, as shown in
Table 1.
2.2.2. The Entropy Generation and Entropy Flow of the Basic Research Capability System of Cluster Enterprises and the Emergence Measurement Model
Based on Shannon's information entropy theory, this study uses the random variable
to represent the state characteristics of an uncertain system, which exhibits complex and unstable properties. For the discrete random variable
X, its set of values is denoted as
, where each value corresponds to a probability distribution
, satisfying the condition that the sum of probabilities equals 1, i.e.,
. Therefore, the information entropy of the system can be expressed by the following formula:
in formula (1),
represents the information entropy of a certain uncertain system, and
represents the probability corresponding to the state random variable of that uncertain system.
For the basic research capability system of cluster enterprises, based on the aforementioned information entropy formula (1), this study can calculate the system's entropy generation and entropy exchange. According to the definitions of entropy generation and entropy flow in the enterprise basic research capability system in section 2.2.2 of this study, we compute the information entropy for n measurement indicators and m years, where ΔS represents the entropy values for the four types of information entropy. The specific calculations are as follows:
In formulas (2), (3), (4), and (5), represents the system's support entropy for the j-th year, represents the system's pressure entropy for the j-th year, represents the system's internal consumption entropy for the j-th year, and represents the system's internal regeneration entropy for the j-th year. Here, represents the normalized value of the i-th measurement indicator in the j-th year, while represents the total normalized value of the n measurement indicators for the j-th year.
Based on formulas (6) and (7), this study calculates the information entropy and entropy weight of each measurement indicator. If calculations are performed for n indicators and m years, let
represent the information entropy of the i-th measurement indicator, which is specifically calculated as follows:
In formula (6), represents the information entropy of the i-th measurement indicator, represents the normalized value of the original data for the i-th measurement indicator in the j-th year, and represents the sum of the normalized values of the n measurement indicators in the j-th year.
Then, based on the entropy weight method, this study calculates the entropy weight
of the i-th measurement indicator, which is specifically calculated as follows:
In formula (7), represents the entropy weight of the i-th measurement indicator, represents the information entropy of the i-th measurement indicator, and n represents the number of measurement indicators. The condition is satisfied.
Finally, based on the entropy weights and the normalized data of the measurement indicators, this study can calculate the total score of the emergence (intensity) of the basic research capability system of cluster enterprises according to formula (8):
In formula (8), represents the normalized data of the i-th measurement indicator in the j-th year, represents the entropy weight of that indicator, and represents the total score of the emergence of the basic research capability system of cluster enterprises for the j-th year.
Based on the value of, this study can determine the emergence characteristics of the basic research capability system of cluster enterprises. When is larger, it indicates that the emergence process in the j-th year exhibits more randomness or irregularity, and the complexity of the emergence process is higher. Conversely, when is smaller, it suggests that the emergence process in the j-th year shows periodicity, and the complexity of the emergence process is lower.
In the positive and negative entropy indicator system of the basic research capability system of cluster enterprises, the measurement indicators that represent organizational process entropy and organizational routine entropy are regarded as positive entropy indicators. An increase in the data of positive entropy indicators will lead to a decrease in the system's emergence measurement total score, referred to as negative measurement indicators. In contrast, the measurement indicators representing direct environmental entropy and indirect environmental entropy are considered negative entropy indicators. An increase in the data of negative entropy indicators will lead to an increase in the system's emergence measurement total score, referred to as positive measurement indicators.
Since the specific numerical ranges and units of the measurement indicators may differ, the original data must be normalized to ensure equal weighting in the calculation. Through normalization, different types of measurement indicators are assigned appropriate weights, allowing for a more accurate reflection of the characteristics of the basic research capability system of cluster enterprises. The normalization methods are as follows:
In formulas (9) and (10), represents the original data of the i-th measurement indicator in the j-th year, represents the normalized value, is the maximum value of all original data for the iii-th measurement indicator, and is the minimum value.