Progress is described regarding the development of a new electrotactile feedback glove designed for application to dexterous robot. The sensitivity of operator's finger against electrical stimulus pulse is conside...Progress is described regarding the development of a new electrotactile feedback glove designed for application to dexterous robot. The sensitivity of operator's finger against electrical stimulus pulse is considered. It is found that frequency, duty ratio, and voltage amplitude of electrical stimulus pulse determine the sensitivity of finger. The effects of materials, sizes, arrangements and shapes of electrodes on sensitivity of finger are analyzed. Finally, the tactile tele presence system is designed to experimentally confirm that the robot with electrotactile feedback glove can manipulate dexterous robotic multi fingered hand and identify and classify three sorts of objects.展开更多
AIM: To assess the effectiveness and safety of perioperative growth hormone (GH) in patients undergoing abdominal surgery.METHODS: We searched the following electronic databases: MEDLINE, EMBASE, the Cochrane Controll...AIM: To assess the effectiveness and safety of perioperative growth hormone (GH) in patients undergoing abdominal surgery.METHODS: We searched the following electronic databases: MEDLINE, EMBASE, the Cochrane Controlled Trials Register, Chinese Bio-medicine Database. The search was undertaken in February 2003. No language restrictions were applied. Randomized controlled trials (RCT) comparing GH with placebo in patients undergoing abdominal surgery were extracted and evaluated.Methodological quality was evaluated using the Jadad scale.RESULTS: Eighteen trials involving 646 patients were included. The combined results showed that GH had a positive effect on improving postoperative nitrogen balance (standardized mean difference [SMD] = 3.37, 95%CI [2.46, 4.27], P＜0.00001), and decreasing the length of hospital stay (weighted mean difference [WMD] = -2.07,95%CI [-3.03, -1.11], P = 0.00002), and reducing the duration of postoperative fatigue syndrome (SMD = -1.83,95%CI [-2.37, -1.30], P＜0.00001), but it could increase blood glucose levels (WMD = 0.91, 95%CI [0.56, 1.25],P＜0.00001).CONCLUSION: GH for patients undergoing abdominal surgery is effective and safe, if blood glucose can be controlled well. Further trials are required with a sufficient size to account for clinical heterogeneity and to measure other important outcomes such as infection, morbidity,mortality, fluid retention, immunomodulatory effects, and tumor recurrence.展开更多
To enhance the security of user data in the clouds,we present an adaptive and dynamic data encryption method to encrypt user data in the mobile phone before it is uploaded.Firstly,the adopted data encryption algorithm...To enhance the security of user data in the clouds,we present an adaptive and dynamic data encryption method to encrypt user data in the mobile phone before it is uploaded.Firstly,the adopted data encryption algorithm is not static and uniform.For each encryption,this algorithm is adaptively and dynamically selected from the algorithm set in the mobile phone encryption system.From the mobile phone's character,the detail encryption algorithm selection strategy is confirmed based on the user's mobile phone hardware information,personalization information and a pseudo-random number.Secondly,the data is rearranged with a randomly selected start position in the data before being encrypted.The start position's randomness makes the mobile phone data encryption safer.Thirdly,the rearranged data is encrypted by the selected algorithm and generated key.Finally,the analysis shows this method possesses the higher security because the more dynamics and randomness are adaptively added into the encryption process.展开更多
Wearable smart devices, such as smart watch, wristband are becoming increasingly popular recently. They generally integrate the MEMS-designed inertial sensors, including accelerometer, gyroscope and compass, which pro...Wearable smart devices, such as smart watch, wristband are becoming increasingly popular recently. They generally integrate the MEMS-designed inertial sensors, including accelerometer, gyroscope and compass, which provide a convenient and inexpensive way to collect motion data of users. Such rich, continuous motion data provide great potential for remote healthcare and decease diagnosis. Information processing algorithms play the critical role in these approaches, which is to extract the motion signatures and to access different kinds of judgements. This paper reviews key algorithms in these areas. In particular, we focus on three kinds of applications: 1) gait analysis; 2) fall detection and 3) sleep monitoring. They are the most popular healthcare applications based on the inertial data. By categorizing and introducing the key algorithms, this paper tries to build a clear map of how the inertial data are processed; how the inertial signatures are defined, extracted, and utilized in different kinds of applications. This will provide a valuable guidance for users to understand the methodologies and to select proper algorithm for specifi c application purpose.展开更多
Outsourcing is a change from horizontal cooperation （coopetition） to a vertical one. That is, the company, which up to now could be considered as a competitor, changes into a supplier. It is worth remembering that t...Outsourcing is a change from horizontal cooperation （coopetition） to a vertical one. That is, the company, which up to now could be considered as a competitor, changes into a supplier. It is worth remembering that the company that is to become a supplier can either create a new one or be an already existing one. This article is based on empirical data coming from the companies from the Visegrad Group that is Poland, the Czech Republic, Slovakia, and Hungary. The results presented here imply that outsourcing has a stimulating effect on innovative activity of a company both in terms of investment and implementation aspects. Also, innovative activity, in its investment and implementation aspects, positively influences the occurrence of outsourcing. This confirms the existence of feedback among these variables. It is worth noting however, that the probability of innovative activity among the companies using outsourcing is higher than the probability of outsourcing among the companies that are irmovatively active. It seems that the influence of outsourcing on innovative activity is stronger than the influence o f innovative activity on outsourcing.展开更多
微地图作为自媒体时代出现的新型地图,具有大众参与、个性化、快速传播等特征,然而现有微地图研究在点符号设计方面存在一定局限,难以完全满足大众个性化制图的需求。为解决这一问题,本文从微地图制作角度出发,选择手绘地图的通用地图...微地图作为自媒体时代出现的新型地图,具有大众参与、个性化、快速传播等特征,然而现有微地图研究在点符号设计方面存在一定局限,难以完全满足大众个性化制图的需求。为解决这一问题,本文从微地图制作角度出发,选择手绘地图的通用地图符号作为研究对象,构建了一个包含多种类型和样式的手绘地图数据集。在现有研究的基础上,通过对比选择目标检测中常用的YOLOv5(You Only Look Once v5)系列模型,深入探索手绘地图中通用地图符号的自动提取方法,并采用YOLOv5-X模型进行手绘地图通用地图符号的提取。实验结果显示,该模型在手绘地图数据集上的point类别提取精确度、召回率和F1得分分别达到了98.42%、94.72%和97%。同时在Quick Draw涂鸦数据集上进行模型泛化能力的测试,本文所使用的模型在该数据集上展现出良好的提取效果。本研究的开展不仅扩充了微地图个性化点符号的研究数据集,还改进了通用地图符号的提取方法,为微地图制图注入了更多元化的元素,也为自媒体时代的地图制作提供了更为灵活和个性化的解决方案。展开更多
文摘Progress is described regarding the development of a new electrotactile feedback glove designed for application to dexterous robot. The sensitivity of operator's finger against electrical stimulus pulse is considered. It is found that frequency, duty ratio, and voltage amplitude of electrical stimulus pulse determine the sensitivity of finger. The effects of materials, sizes, arrangements and shapes of electrodes on sensitivity of finger are analyzed. Finally, the tactile tele presence system is designed to experimentally confirm that the robot with electrotactile feedback glove can manipulate dexterous robotic multi fingered hand and identify and classify three sorts of objects.
基金Supported by the China Medical Board of New York No. 98-680
文摘AIM: To assess the effectiveness and safety of perioperative growth hormone (GH) in patients undergoing abdominal surgery.METHODS: We searched the following electronic databases: MEDLINE, EMBASE, the Cochrane Controlled Trials Register, Chinese Bio-medicine Database. The search was undertaken in February 2003. No language restrictions were applied. Randomized controlled trials (RCT) comparing GH with placebo in patients undergoing abdominal surgery were extracted and evaluated.Methodological quality was evaluated using the Jadad scale.RESULTS: Eighteen trials involving 646 patients were included. The combined results showed that GH had a positive effect on improving postoperative nitrogen balance (standardized mean difference [SMD] = 3.37, 95%CI [2.46, 4.27], P＜0.00001), and decreasing the length of hospital stay (weighted mean difference [WMD] = -2.07,95%CI [-3.03, -1.11], P = 0.00002), and reducing the duration of postoperative fatigue syndrome (SMD = -1.83,95%CI [-2.37, -1.30], P＜0.00001), but it could increase blood glucose levels (WMD = 0.91, 95%CI [0.56, 1.25],P＜0.00001).CONCLUSION: GH for patients undergoing abdominal surgery is effective and safe, if blood glucose can be controlled well. Further trials are required with a sufficient size to account for clinical heterogeneity and to measure other important outcomes such as infection, morbidity,mortality, fluid retention, immunomodulatory effects, and tumor recurrence.
文摘To enhance the security of user data in the clouds,we present an adaptive and dynamic data encryption method to encrypt user data in the mobile phone before it is uploaded.Firstly,the adopted data encryption algorithm is not static and uniform.For each encryption,this algorithm is adaptively and dynamically selected from the algorithm set in the mobile phone encryption system.From the mobile phone's character,the detail encryption algorithm selection strategy is confirmed based on the user's mobile phone hardware information,personalization information and a pseudo-random number.Secondly,the data is rearranged with a randomly selected start position in the data before being encrypted.The start position's randomness makes the mobile phone data encryption safer.Thirdly,the rearranged data is encrypted by the selected algorithm and generated key.Finally,the analysis shows this method possesses the higher security because the more dynamics and randomness are adaptively added into the encryption process.
基金supported in part by National Natural Science Foundation of China Grant 61202360, 61033001, 61361136003the National Basic Research Program of China Grant 2011CBA00300, 2011CBA00302
文摘Wearable smart devices, such as smart watch, wristband are becoming increasingly popular recently. They generally integrate the MEMS-designed inertial sensors, including accelerometer, gyroscope and compass, which provide a convenient and inexpensive way to collect motion data of users. Such rich, continuous motion data provide great potential for remote healthcare and decease diagnosis. Information processing algorithms play the critical role in these approaches, which is to extract the motion signatures and to access different kinds of judgements. This paper reviews key algorithms in these areas. In particular, we focus on three kinds of applications: 1) gait analysis; 2) fall detection and 3) sleep monitoring. They are the most popular healthcare applications based on the inertial data. By categorizing and introducing the key algorithms, this paper tries to build a clear map of how the inertial data are processed; how the inertial signatures are defined, extracted, and utilized in different kinds of applications. This will provide a valuable guidance for users to understand the methodologies and to select proper algorithm for specifi c application purpose.
文摘Outsourcing is a change from horizontal cooperation （coopetition） to a vertical one. That is, the company, which up to now could be considered as a competitor, changes into a supplier. It is worth remembering that the company that is to become a supplier can either create a new one or be an already existing one. This article is based on empirical data coming from the companies from the Visegrad Group that is Poland, the Czech Republic, Slovakia, and Hungary. The results presented here imply that outsourcing has a stimulating effect on innovative activity of a company both in terms of investment and implementation aspects. Also, innovative activity, in its investment and implementation aspects, positively influences the occurrence of outsourcing. This confirms the existence of feedback among these variables. It is worth noting however, that the probability of innovative activity among the companies using outsourcing is higher than the probability of outsourcing among the companies that are irmovatively active. It seems that the influence of outsourcing on innovative activity is stronger than the influence o f innovative activity on outsourcing.
文摘微地图作为自媒体时代出现的新型地图,具有大众参与、个性化、快速传播等特征,然而现有微地图研究在点符号设计方面存在一定局限,难以完全满足大众个性化制图的需求。为解决这一问题,本文从微地图制作角度出发,选择手绘地图的通用地图符号作为研究对象,构建了一个包含多种类型和样式的手绘地图数据集。在现有研究的基础上,通过对比选择目标检测中常用的YOLOv5(You Only Look Once v5)系列模型,深入探索手绘地图中通用地图符号的自动提取方法,并采用YOLOv5-X模型进行手绘地图通用地图符号的提取。实验结果显示,该模型在手绘地图数据集上的point类别提取精确度、召回率和F1得分分别达到了98.42%、94.72%和97%。同时在Quick Draw涂鸦数据集上进行模型泛化能力的测试,本文所使用的模型在该数据集上展现出良好的提取效果。本研究的开展不仅扩充了微地图个性化点符号的研究数据集,还改进了通用地图符号的提取方法,为微地图制图注入了更多元化的元素,也为自媒体时代的地图制作提供了更为灵活和个性化的解决方案。
