In the process of promoting the open sharing of scientific data management, a standardized and effective scientific data management policy is crucial, which could provide effective theoretical support for the improvement of the scientific data management policy system. To address this problem of imperfect evaluation mechanism and lack of quantitative analysis, we take Chinese scientific data management policies as the research nut. Firstly, we construct an evaluation index system with nine causal variables and a PMC-AE index calculation model, and conduct a more comprehensive evaluation and quantitative analysis of the seven mainstream scientific data management policies in China. The analysis results show that the overall distribution of Chinese scientific data management policies show "national-level-provincial and municipal-level-universities/research institutions".
Biometrics authentication based on multimodal fusion can overcome the problems of the existence of unimodal biometric to a large extent. However, multimodal biometric template once leaked, it will bring more harm, so it is necessary to study the template protection algorithm for multimodal biometric. This paper proposes a novel multimodal biometric template protection algorithm based on DNA encoding. First, the biometric features of the multimodal template are convert into a DNA sequence by DNA encoding, and a chaotic sequence is generated and convert into a DNA sequence, then the two DNA sequences are performed by the DNA adding operation, and the sum is convert into decimal numbers, so we get the encrypted template. The results of our experiment show that the proposed multimodal biometric template protection scheme does not affect the recognition performance and ensure the security of multimodal biometric template.
Objective: To evaluate the imaging features, clinical presentation, operative methods complication and the surgical outcomes of the congenital pyriform sinus fistula(CPSF). Methods: The clinical data of 185 patients with CPSF treated from January 2013 to October 2017 at the First Affiliated Hospital of Zhengzhou University were analyzed retrospectively. Results: The lesions were predominantly on the left side(170/185). Among 185 cases, 146 cases received endoscopic coblation cauterization, 27 cases had traditional open surgery, 8 cases underwent endoscopic coblation cauterization plus traditional open surgery, 2 cases for endoscopic chemocauterization, and 2 cases for endoscopic electrosection. Twenty-eight cases recurred, with a recurrence rate of 15.1%. Postoperative hoarseness occurred in 22 cases, disappeared within 0.5-6.0 months later. Conclusions: Patients with a history of recurrent cervical abscess should be highly suspect the existence of CPSF. Endoscopic coblation cauterization is a kind of surgical method with minimal injury, with low recurrence rate and low operative risk.目的： 探讨先天性梨状窝瘘的影像学检查、临床表现、手术方式、并发症及术后疗效。 方法： 回顾分析2013年1月至2017年10月经郑州大学第一附属医院收治，通过手术确认的185例先天性梨状窝瘘患者的临床资料。 结果： 170例为左侧梨状窝瘘，15例为右侧梨状窝瘘。146例行内镜下梨状窝瘘口低温消融术，27例行颈侧瘘管切除术，8例行颈部瘘管切除术＋支撑喉镜下梨状窝瘘管低温消融术，2例行内镜下梨状窝瘘口化学烧灼术，2例行内镜下梨状窝瘘电刀烧灼术。28例复发，复发率为15.1%。22例患者出现声音嘶哑。随访0.5～6个月后恢复。 结论： 对反复发作颈部脓肿的患者，应高度怀疑先天性梨状窝瘘，内镜下低温消融术是一种损伤小、复发率低及手术风险较低的一种手术方式。.
A malicious PDF file detection method based on ensemble learning is proposed to address the problem that malicious PDF files are highly concealed and difficult to detect. In order to efficiently identify malicious PDF files that are highly concealed, the detection range of malicious PDF files by machine learning models is improved by combining the conventional features of PDF files with structural features. The recognition module adopts Stacking method of ensemble learning, adds weighting operation to improve the combination performance of multiple base learners, and finds the best combination of base learners and meta learner through experiments. After experiments, NB, RF and DT are selected as the optimal Stacking model base learners and Logistic Regression as the meta learner. the optimal Stacking model achieves 98.70% accuracy on the test set, which is better than Adaboost model and deep learning DNN model.
Objective: To explore the application value of endoscope in probing the chronic wound with sinus tract in clinic. Methods: Twenty-eight chronic wounds with sinus tracts from 27 patients conforming to the inclusion criteria admitted to Outpatient Department of Wound Healing Center of Ruijin Hospital from December 2017 to March 2018 were investigated in a prospective and self-controlled trial. After being cleaned, the diameter of the opening of sinus tract was measured with a rule. A probe was used to measure the depth of a sinus tract according to the touch from the probe extremity in operation, and to measure the depth of a sinus tract that could be observed with naked eyes with the help of a pair of hemostatic forceps. Five minutes later, a probe was inserted deeply into the sinus tract to measure the depth under the endoscopic view combined with touch from the probe extremity in operation. Afterwards, the sinus tract was observed with endoscope, and the depth of the tract which could be observed under the endoscopic view was measured using a probe inserted deeply into the sinus tract. After completion of the above exploration, the sinus tract was infused with contrast agent Omnipaque 350 and scanned by computed tomography (CT) later to obtain its depth. The following indicators were calculated: the ratio of the depth of the sinus tract measured by CT to the diameter of the opening of the sinus tract (hereinafter referred to as the depth/diameter ratio of the sinus tract), the deviation rate comparing the depth of the sinus tract measured by conventional method (measured by probe only) and by endoscope (measured by probe under the endoscope view) with the depth of the sinus tract measured by CT (hereinafter referred to as the deviation rate of the measured depth of the sinus tract), the deviation rate comparing the depth of the sinus tract that could be observed measured by conventional method and by endoscope with the depth of the sinus tract measured by CT (hereinafter referred to as the deviation rate of the depth of the sinus tract that could be observed). Data were processed with paired t test. Pearson correlation analysis was applied to analyze the correlation between the depth/diameter ratio of the sinus tract and the deviation rate of the measured depth of the sinus tract and the deviation rate of the depth of the sinus tract that could be observed by conventional method and by endoscope. Results: The depth/diameter ratio of the sinus tract of this group of wounds was 1-32 (8±7). The deviation rate of the measured depth of the sinus tract and the deviation rate of the depth of the sinus tract that could be observed by conventional method were (19±14)% and (79±18)%, respectively, both obviously larger than (9±9)% and (25±25)% by endoscope (t=3.837, 13.626, P<0.01). Positive correlation existed between the depth/diameter ratio of the sinus tract and the deviation rate of the measured depth of the sinus tract by conventional method, and between the depth/diameter ratio of the sinus tract and the deviation rate of the depth of the sinus tract that could be observed by conventional method and by endoscope (r=0.514, 0.585, 0.651, P<0.01). However, there was no obvious correlation between the depth/diameter ratio of the sinus tract and the deviation rate of the measured depth of the sinus tract by endoscope (r=0.113, P>0.05). Conclusions: Compared with the conventional method, application of endoscope is able to get more accurate data of chronic wounds with sinus tracts and observe the wounds with wider range.目的： 探讨内镜在临床窦道型慢性创面探查中的应用价值。 方法： 2017年12月—2018年3月，笔者单位创面修复中心门诊收治27例符合入选标准的窦道型慢性创面患者，对其28个窦道型慢性创面进行前瞻性自身前后对照研究。清理窦口后，用刻度尺测量窦口口径，用探针根据手感盲测窦道深度，另借助止血钳在肉眼直视下用探针测量窦道可见纵深。5 min后，在内镜监视下深入探针并结合手感测量窦道深度，另用内镜观察窦道并深入探针测量内镜视野下窦道可见纵深。完成上述探查后，于窦道内灌注对比剂欧乃派克350行CT检查测量窦道深度。计算CT检查测得的窦道深度和刻度尺测量的窦口口径的比值(下称窦道深口比)、常规检查(只用探针测量)和内镜检查(内镜监视下用探针测量)测得窦道深度与CT检查测得窦道深度的偏差率(下称窦道测深偏差率)、常规检查和内镜检查测得窦道可见纵深与CT检查测得窦道深度的偏差率(下称窦道可见纵深偏差率)。对数据行配对t检验，另对窦道深口比与常规检查和内镜检查的窦道测深偏差率和窦道可见纵深偏差率的相关性进行Pearson相关分析。 结果： 本组创面的窦道深口比为1～32(8±7)。本组创面常规检查的窦道测深偏差率和窦道可见纵深偏差率分别为(19±14)%、(79±18)%，均明显大于内镜检查的(9±9)%、(25±25)%(t＝3.837、13.626，P<0.01)。本组创面窦道深口比与常规检查的窦道测深偏差率以及常规检查、内镜检查的窦道可见纵深偏差率均呈明显正相关(r＝0.514、0.585、0.651，P<0.01)，而窦道深口比与内镜检查的窦道测深偏差率无明显相关(r＝0.113，P>0.05)。 结论： 采用内镜可以较常规检查获得更准确的临床窦道型慢性创面形态数据，能更大范围地观察该类创面。.
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