ms paper proposes a set of objective and quantitative human motion evaluation indices, among Which the index of difficulty and index of performance are introduced as the general indices for the quality measure of 2-D ...ms paper proposes a set of objective and quantitative human motion evaluation indices, among Which the index of difficulty and index of performance are introduced as the general indices for the quality measure of 2-D target-to-talget movement. As an example, the target-reaching movement of index finger, which is a basic functional action of index finger in the daily life of hUman beings, were experimentally investigated. In the experiment five healthy male subjects were asked to perform three target-reaching movement tasks Which have different indices of difficulty. All movements were recorded by a 3-D motion analysis system. Later, their motion qualities were measured with these evaluation metrics. The results showed that these indices are reasonable and have potential applications to biomedical engineering.展开更多
The three most common variations of Fitts’ index of difficulty are the Fitts formulation, the Welford formulation, and the Shannon formulation. A recent paper by Hoffmann [1] critiqued the three and concluded that th...The three most common variations of Fitts’ index of difficulty are the Fitts formulation, the Welford formulation, and the Shannon formulation. A recent paper by Hoffmann [1] critiqued the three and concluded that the Fitts and Welford formulations are valid and that the Shannon formulation is invalid. In this paper, we challenge Hoffmann’s position regarding the Shannon formulation. It is argued that the issue of validity vs. invalidity is ill-conceived, given that Fitts’ law is a “model by analogy” with no basis in human motor control. The relevant questions are of utility: Does a model work? How well? Is it useful? Where alternative formulations exist, they may be critiqued and compared for strengths and weaknesses, but validity is an irrelevant construct. In a reanalysis of data from Fitts’ law experiments, models built using the Shannon formulation are (re)affirmed to be as good as, and generally better than, those built using the Fitts or Welford formulation.展开更多
探讨指标难度赋权法、TOPSIS(Technique for Order Preference by Similarity to Ideal Solution)法和RSR(Rank-Sum Ratio)法在学术期刊影响力综合评价中的应用范围和实际意义,为学术期刊影响力综合评价提供更加科学、可行的新方法。将...探讨指标难度赋权法、TOPSIS(Technique for Order Preference by Similarity to Ideal Solution)法和RSR(Rank-Sum Ratio)法在学术期刊影响力综合评价中的应用范围和实际意义,为学术期刊影响力综合评价提供更加科学、可行的新方法。将这三种方法相结合,以我国16种中文体育类核心期刊为例,通过对反映期刊论文影响力的影响因子、期刊他引率、平均引文率等8项指标的综合评价,进行合理分档。结果表明,指标难度赋权法、TOPSIS法结合RSR法提高了综合评价能力,能够较为合理地评价学术期刊影响力,且操作简便、结果可靠,适合在学术期刊影响力综合评价中推广应用。展开更多
文摘ms paper proposes a set of objective and quantitative human motion evaluation indices, among Which the index of difficulty and index of performance are introduced as the general indices for the quality measure of 2-D target-to-talget movement. As an example, the target-reaching movement of index finger, which is a basic functional action of index finger in the daily life of hUman beings, were experimentally investigated. In the experiment five healthy male subjects were asked to perform three target-reaching movement tasks Which have different indices of difficulty. All movements were recorded by a 3-D motion analysis system. Later, their motion qualities were measured with these evaluation metrics. The results showed that these indices are reasonable and have potential applications to biomedical engineering.
文摘The three most common variations of Fitts’ index of difficulty are the Fitts formulation, the Welford formulation, and the Shannon formulation. A recent paper by Hoffmann [1] critiqued the three and concluded that the Fitts and Welford formulations are valid and that the Shannon formulation is invalid. In this paper, we challenge Hoffmann’s position regarding the Shannon formulation. It is argued that the issue of validity vs. invalidity is ill-conceived, given that Fitts’ law is a “model by analogy” with no basis in human motor control. The relevant questions are of utility: Does a model work? How well? Is it useful? Where alternative formulations exist, they may be critiqued and compared for strengths and weaknesses, but validity is an irrelevant construct. In a reanalysis of data from Fitts’ law experiments, models built using the Shannon formulation are (re)affirmed to be as good as, and generally better than, those built using the Fitts or Welford formulation.
文摘探讨指标难度赋权法、TOPSIS(Technique for Order Preference by Similarity to Ideal Solution)法和RSR(Rank-Sum Ratio)法在学术期刊影响力综合评价中的应用范围和实际意义,为学术期刊影响力综合评价提供更加科学、可行的新方法。将这三种方法相结合,以我国16种中文体育类核心期刊为例,通过对反映期刊论文影响力的影响因子、期刊他引率、平均引文率等8项指标的综合评价,进行合理分档。结果表明,指标难度赋权法、TOPSIS法结合RSR法提高了综合评价能力,能够较为合理地评价学术期刊影响力,且操作简便、结果可靠,适合在学术期刊影响力综合评价中推广应用。
