Eye diagnosis is a method for inspecting systemic diseases and syndromes by observing the eyes.With the development of intelligent diagnosis in traditional Chinese medicine(TCM);artificial intelligence(AI)can improve ...Eye diagnosis is a method for inspecting systemic diseases and syndromes by observing the eyes.With the development of intelligent diagnosis in traditional Chinese medicine(TCM);artificial intelligence(AI)can improve the accuracy and efficiency of eye diagnosis.However;the research on intelligent eye diagnosis still faces many challenges;including the lack of standardized and precisely labeled data;multi-modal information analysis;and artificial in-telligence models for syndrome differentiation.The widespread application of AI models in medicine provides new insights and opportunities for the research of eye diagnosis intelli-gence.This study elaborates on the three key technologies of AI models in the intelligent ap-plication of TCM eye diagnosis;and explores the implications for the research of eye diagno-sis intelligence.First;a database concerning eye diagnosis was established based on self-su-pervised learning so as to solve the issues related to the lack of standardized and precisely la-beled data.Next;the cross-modal understanding and generation of deep neural network models to address the problem of lacking multi-modal information analysis.Last;the build-ing of data-driven models for eye diagnosis to tackle the issue of the absence of syndrome dif-ferentiation models.In summary;research on intelligent eye diagnosis has great potential to be applied the surge of AI model applications.展开更多
Growth indicators including weight, body length, wings length, tail length, tarsus, gape, the third toe and head width of 21 nestlings of Great Bustard (Otis tarda) were measured and investigated in Harbin Zoo, Harbin...Growth indicators including weight, body length, wings length, tail length, tarsus, gape, the third toe and head width of 21 nestlings of Great Bustard (Otis tarda) were measured and investigated in Harbin Zoo, Harbin, China during 1999-2002, and methods on successfully fostering nestlings of the bird were also summarized in this article. The results showed: the Great Bustard is a kind of premature bird and its birth weight was 86.31?.56g (N=21); environmental temperature for the neonatal nestlings should be controlled at 36C; the feeding principle having many meals but little food at each for the nestlings should be followed; since six weeks after birth, nestlings of both gender began to show significant difference in body weight, the weight of male was 1.8 times of that of the female after fourteenth week, and by weight and body figure sexual identity could be easily discerned when 3 or 4 months old; There is no significant difference in growth and development of all organs between male and female nestlings and organ growth curves were fit into Logistic equation.展开更多
[Objective] The aim was to analyze the phenomenon of employment diffi- culty and labor shortage, and to reveal the influencing factors of employment difli- culty and labor shortage. [Method] On the basis of the econom...[Objective] The aim was to analyze the phenomenon of employment diffi- culty and labor shortage, and to reveal the influencing factors of employment difli- culty and labor shortage. [Method] On the basis of the economic principle of popu- lation dividend, the use of human resources and natural resource constraints The IS-LM model describes these two states. [Results] The resource constraints have a ＂squeeze＂ effect on the demographic dividend, and employment pressure is shown in terms of the population opportunity window; the labor market segmentation, the ir- rational industrial structure, the backward curriculum and employment concept are the main factors affecting employment and labor shortage. [Conclusion] The way to solve this dilemma must be removed from the division of labor market, the adjust- ment of industrial structure, the setting of university specialty, the change of em- ployment concept of university graduates as well as the improvement of the quality of labor.展开更多
The goal of the giant panda ( Ailuropoda melanoleuca ) breeding program is to develop a self sustaining,genetically diverse population.Due to the common problems about sexual incompatibility and a limited number of...The goal of the giant panda ( Ailuropoda melanoleuca ) breeding program is to develop a self sustaining,genetically diverse population.Due to the common problems about sexual incompatibility and a limited number of captive born males that breed naturally,artificial insemination (AI) has become a critical genetic management tool.It is common practice,however,to combine natural mating and AI using semen from non breeding males.From 1998 to 2000 at the Wolong breeding facility,12 of 18 (66.7%) females produced 20 cubs following combined natural mating and AI.The objective of this study was to determine the efficiency of AI without natural breeding.In 1998 and 2000,seven females were anesthetized for transcervical AI on two consecutive days.Ejaculates from six males were collected by electroejaculation,diluted in an egg yolk diluent containing 0% or 4% glycerol and used either fresh or following cold storage at 4℃ (for 24 or 48 h) or cryopreservation using the pellet freezing method.Mean (±SEM) ejaculate traits in six male sperm donors were:ejaculate volume,3.3±0.5 ml;sperm concentration,1,429.8±235.4×10 6/ml;sperm motility,81.7±2.1%;progression (0～5,5=best),3.1±0.1;and normal sperm,79.3±9.2%.For AI (n = 14) in seven females,mean inseminate traits were:spermic volume inseminated,2.4±0.3 ml;sperm motility,73.5±2.9%;progression,2.5±0.1;and total motile sperm inseminated/AI,684.2±118.2×10 6.Four of seven (57.1%) females became pregnant and produced five cubs of which four survived.Mean gestation and litter size was 131.5±9.7 days and 1.3±0.3 cubs/litter,respectively.These results indicate that the efficiency of AI is sufficient for recovering valuable genes from non breeding individuals to enhance genetic diversity in the ex situ population of giant pandas.展开更多
By using investigative means of marketing, this paper collects and analyzes the data of English demand of employment units for newly-graduated .graduates. Its research and analysis include six parts, namely, an overal...By using investigative means of marketing, this paper collects and analyzes the data of English demand of employment units for newly-graduated .graduates. Its research and analysis include six parts, namely, an overall analysis, an analysis of English demand according to the kind of employment units, according to trade, according to job, according to specialty and the five skills of ＂listening, speaking, reading, writing and translation＂. The supplied data tell the reality of the current English demand of employment units in China, which would also reflect the trend in the coming few years. The analysis of the data embodies the reality of college English teaching, discusses its advantages and disadvantages and puts forward reasonable suggestions on college English teaching and evaluation system.展开更多
Numerous coal fires burn underneath the Datong coalfield because of indiscriminate mining.Landsat TM/ETM,unmanned aerial vehicle（UAV）,and infrared thermal imager were employed to monitor underground coal fires in th...Numerous coal fires burn underneath the Datong coalfield because of indiscriminate mining.Landsat TM/ETM,unmanned aerial vehicle（UAV）,and infrared thermal imager were employed to monitor underground coal fires in the Majiliang mining area.The thermal field distributions of this area in 2000,2002,2006,2007,and 2009 were obtained using Landsat TM/ETM.The changes in the distribution were then analyzed to approximate the locations of the coal fires.Through UAV imagery employed at a very high resolution（0.2 m）,the texture information,linear features,and brightness of the ground fissures in the coal fire area were determined.All these data were combined to build a knowledge model of determining fissures and were used to support underground coal fire detection.An infrared thermal imager was used to map the thermal field distribution of areas where coal fire is serious.Results were analyzed to identify the hot spot trend and the depth of the burning point.展开更多
[Objective] This study was to find out the artificial diet formula for Erigoni- dium graminicolum （Sundevall） to realize its indoor artificial breeding. [Method] Using orthogonal decomposition method, the diet most ...[Objective] This study was to find out the artificial diet formula for Erigoni- dium graminicolum （Sundevall） to realize its indoor artificial breeding. [Method] Using orthogonal decomposition method, the diet most suitable for the normal and quick growth of Erigonidium graminicolum （sundevall）, was developed by adding different species and different proportions of fresh insects to the artificial diet based on the formula of total nutrient solution proposed by Zhao Jing-zhao. [Result] The most suit- able formula for the development and growth of Erigonidium graminicolum （Sundevall） is 10 ml of egg white, 2 g of honey, 2 g of sucrose, 10 ml of water, 5 g of Ci- cadella viridis, moderate amount of cornmeal, compound vitamin B1 and vitamin C1. [Conclusion] The development of new type artificial diet can provide timely and nec- essary material premise for its large-scale indoor propagation.展开更多
This paper introduces the recent highly significant activity of China Oilfield Services Ltd. （COSL） in the South China Sea, where COSL conducted pretrial drilling in June of 2008. The paper discusses some key resear...This paper introduces the recent highly significant activity of China Oilfield Services Ltd. （COSL） in the South China Sea, where COSL conducted pretrial drilling in June of 2008. The paper discusses some key research and new practices which led to the fabrication of related equipment which was evaluated in the trial. The market for deepwater drilling in the world has grown over the past 10 years but there are few drilling vessels or platforms suitable for drilling in deepwater or super deepwater. China needs equipment capable of deepwater drilling operations. COSL has some semisubmersible platforms, but they are only considered suitable for operations in water depths less than 475 m. An enabling technology, referred to as an artificial seabed, has been under development by COSL since 2004, and it applies the research results and experiences of many experts in deepwater drilling. COSL hopes this technology will allow drilling to depths of approximately 1 000-1 500m with its current platforms. The paper presents research progress and improvements in fabrication and necessary upgrades to equipment for extending deepwater drilling. The pretrial well was executed at a water depth of nearly 500m. COSL will drill the trial well around 2009 at the same location in the South China Sea.展开更多
Plenty of dams in China are in danger while there are few effective methods for underwater dam inspections of hidden problems such as conduits,cracks and inanitions.The dam safety inspection remotely operated vehicle(...Plenty of dams in China are in danger while there are few effective methods for underwater dam inspections of hidden problems such as conduits,cracks and inanitions.The dam safety inspection remotely operated vehicle(DSIROV) is designed to solve these problems which can be equipped with many advanced sensors such as acoustical,optical and electrical sensors for underwater dam inspection.A least-square parameter estimation method is utilized to estimate the hydrodynamic coefficients of DSIROV,and a four degree-of-freedom(DOF) simulation system is constructed.The architecture of DSIROV's motion control system is introduced,which includes hardware and software structures.The hardware based on PC104 BUS,uses AMD ELAN520 as the controller's embedded CPU and all control modules work in VxWorks real-time operating system.Information flow of the motion system of DSIROV,automatic control of dam scanning and dead-reckoning algorithm for navigation are also discussed.The reliability of DSIROV's control system can be verified and the control system can fulfill the motion control mission because embankment checking can be demonstrated by the lake trials.展开更多
Background The CRUSADE, ACTION and ACUITY-HORIZONS scores are commonly used for predicting in-hospital major bleeding events in patients with acute coronary syndrome （ACS）, but the homogeneous nature of these models...Background The CRUSADE, ACTION and ACUITY-HORIZONS scores are commonly used for predicting in-hospital major bleeding events in patients with acute coronary syndrome （ACS）, but the homogeneous nature of these models＇ population limits simple ex- trapolation to other local population. We aimed to compare the performance of the three risk models in Chinese patients. Methods We evaluated the performance of the three predicting scores for predicting in-hospital major bleeding events defined by thrombolysis in myocar- dial infarction （TIMI） serious （major and minor） episodes, in a cohort of Chinese ACS patients with either non-ST-elevation ACS （NSTE-ACS） or ST-elevation myocardial infarction （STEMI）. Calibration and discrimination of the three risk models were evaluated by the Hosmer-Lemeshow test and C-statistic, respectively. We compared the predictive accuracy of the risk scores by the Delong non-parametric test. Results TIMI serious bleeding rate was 1.1% overall （1.9% and 0.86% for STEMI and NSTE-ACS, respectively）. The CRUSADE, ACTION and ACUTIY-HOR/ZONS scores showed an adequate discriminatory capacity for major bleeding： in overall patients, the C-statistic was 0.80, 0.77, and 0.70, respectively; in NSTE-ACS patients, the C-statistic was 0.73, 0.72, and 0.64, respectively; in STEMI patients, the C-statistic was 0.91, 0.92, and 0.75, respectively. The C-statistic for the ACUITY-HORIZONS model was significantly lower than those of the CRUSADE and ACTION scores for the prediction of TIM/serious bleeding in overall patients （compared with CRUSADE, z = 3.83, P = 0.02; compared with ACTION, z = 3.51, P = 0.03）; in NSTE-ACS patients （compared with CRUSADE, z = 2.37, P = 0.01; compared with ACTION, z = 2.11, P = 0.04）, and in STEMI patients （compared with CRUSADE, z = 2.6.77, P = 0.02; compared with AC- TION, z = 7.91, P = 0.002）. No differences were observed when the CRUSADE and ACTION models were compared to each other, regard- less of overall patients （z = 0.68, P = 0.31） and both of ACS types （NSTE-ACS, z = 0.52, P = 0.60）, and STEMI patients （z = 0.36, P = 0.74）. However, the three risk scores all overestimated the absolute major bleeding risk in each risk stratification in our study. For example, the predicted rate of CRUSADE score at high risk stratification was 11.9% vs. an actual rate of 5.3%. Conclusions The CRUSADE and AC- TION scores had a greater calibration and discrimination for in-hospital major bleeding compared with the ACUITY-HORIZONS score in Chinese patients with ACS undergoing PCI. However, they all overestimated the bleeding risk rate for Chinese populations. Calibration of these risk scores would be useful for the generalization in Chinese populations.展开更多
In recent years, our department has adopted a catgut point-embedding therapy in the treatment of 76 cases of chronic ulcerative colitis, with quite good therapeutic effects. The following is a report of it.Clinical Da...In recent years, our department has adopted a catgut point-embedding therapy in the treatment of 76 cases of chronic ulcerative colitis, with quite good therapeutic effects. The following is a report of it.Clinical DataOf 76 cases we treated, 32 were male, and 44 female, with the ages ranging from 23 to 65 years and the duration of illness from 6 months to 20 years.All the cases complained of chronic diarrhea, most of them had mucous and blood stool, and some had tenesmus. Sigmoscopic findings showed that all the cases had varying degrees of colic mucosal congestion and edema, fragile mucosa easy to bleed upon touching, or rough mucosa with multiple ulcers varying in size, shape, and depth.展开更多
Objective: To evaluate the benefits and risks of tight glycemia control (TGC) versus conventional glucose control (CGC) in critically ill brain-injured adults. Methods: We performed meta-analysis by systematically sea...Objective: To evaluate the benefits and risks of tight glycemia control (TGC) versus conventional glucose control (CGC) in critically ill brain-injured adults. Methods: We performed meta-analysis by systematically searching PubMed, EMBASE, OVID, ScienceDirect, Web of Science, CNKI, Wanfang Data, and CQVIP databases to retrieve RCTs in any languages. We used Review Manager to perform meta-analysis. Odds ratios (ORs) or weighted mean differences (WMDs) with 95% confidence intervals (CIs) were calculated in analyses. Results: Twenty-six RCTs with a total of 3,759 participants were included in this meta-analysis. In-hospital mortality showed significant dissimilarity between TGC and CGC groups with OR of 0.76 (95%CI 0.58, 0.99). However, in terms of overall mortality and long-term neurological severity outcome, it didn't show differences with ORs of 0.93 (95%CI 0.79, 1.10) and 1.15 (95%CI 0.96, 1.37). There were also discrepancies in infection rate and ICU length of stay with OR of 0.51 (95%CI 0.42, 0.62) and WMD of -2.37 (95%CI -2.99, -1.74). Significances were observed in hypoglycemia events with ORs of 6.24 (95%CI 4.83, 8.07) and 2.73 (95%CI 2.56, 2.91) using two methods. Conclusion: In critically ill brain injury, TGC did not show beneficial effects on reducing overall mortality and long term neurological outcome, but it increased the risk of hypoglycemia.展开更多
Electroencephalogram (EEG) is an efficient tool in exploring human brains. It plays a very important role in diagnosis of disorders related to epilepsy and development of new interaction techniques between machines an...Electroencephalogram (EEG) is an efficient tool in exploring human brains. It plays a very important role in diagnosis of disorders related to epilepsy and development of new interaction techniques between machines and human beings,namely,brain-computer interface (BCI). The purpose of this review is to illustrate the recent researches in EEG processing and EEG-based BCI. First,we outline several methods in removing artifacts from EEGs,and classical algorithms for fatigue detection are discussed. Then,two BCI paradigms including motor imagery and steady-state motion visual evoked potentials (SSMVEP) produced by oscillating Newton's rings are introduced. Finally,BCI systems including wheelchair controlling and electronic car navigation are elaborated. As a new technique to control equipments,BCI has promising potential in rehabilitation of disorders in central nervous system,such as stroke and spinal cord injury,treatment of attention deficit hyperactivity disorder (ADHD) in children and development of novel games such as brain-controlled auto racings.展开更多
基金National Natural Science Foundation of China(82274265 and 82274588)Hunan University of Traditional Chinese Medicine Research Unveiled Marshal Programs(2022XJJB003).
文摘Eye diagnosis is a method for inspecting systemic diseases and syndromes by observing the eyes.With the development of intelligent diagnosis in traditional Chinese medicine(TCM);artificial intelligence(AI)can improve the accuracy and efficiency of eye diagnosis.However;the research on intelligent eye diagnosis still faces many challenges;including the lack of standardized and precisely labeled data;multi-modal information analysis;and artificial in-telligence models for syndrome differentiation.The widespread application of AI models in medicine provides new insights and opportunities for the research of eye diagnosis intelli-gence.This study elaborates on the three key technologies of AI models in the intelligent ap-plication of TCM eye diagnosis;and explores the implications for the research of eye diagno-sis intelligence.First;a database concerning eye diagnosis was established based on self-su-pervised learning so as to solve the issues related to the lack of standardized and precisely la-beled data.Next;the cross-modal understanding and generation of deep neural network models to address the problem of lacking multi-modal information analysis.Last;the build-ing of data-driven models for eye diagnosis to tackle the issue of the absence of syndrome dif-ferentiation models.In summary;research on intelligent eye diagnosis has great potential to be applied the surge of AI model applications.
文摘Growth indicators including weight, body length, wings length, tail length, tarsus, gape, the third toe and head width of 21 nestlings of Great Bustard (Otis tarda) were measured and investigated in Harbin Zoo, Harbin, China during 1999-2002, and methods on successfully fostering nestlings of the bird were also summarized in this article. The results showed: the Great Bustard is a kind of premature bird and its birth weight was 86.31?.56g (N=21); environmental temperature for the neonatal nestlings should be controlled at 36C; the feeding principle having many meals but little food at each for the nestlings should be followed; since six weeks after birth, nestlings of both gender began to show significant difference in body weight, the weight of male was 1.8 times of that of the female after fourteenth week, and by weight and body figure sexual identity could be easily discerned when 3 or 4 months old; There is no significant difference in growth and development of all organs between male and female nestlings and organ growth curves were fit into Logistic equation.
基金Supported by the National Social Science Fund of China(13XSH017)~~
文摘[Objective] The aim was to analyze the phenomenon of employment diffi- culty and labor shortage, and to reveal the influencing factors of employment difli- culty and labor shortage. [Method] On the basis of the economic principle of popu- lation dividend, the use of human resources and natural resource constraints The IS-LM model describes these two states. [Results] The resource constraints have a ＂squeeze＂ effect on the demographic dividend, and employment pressure is shown in terms of the population opportunity window; the labor market segmentation, the ir- rational industrial structure, the backward curriculum and employment concept are the main factors affecting employment and labor shortage. [Conclusion] The way to solve this dilemma must be removed from the division of labor market, the adjust- ment of industrial structure, the setting of university specialty, the change of em- ployment concept of university graduates as well as the improvement of the quality of labor.
文摘The goal of the giant panda ( Ailuropoda melanoleuca ) breeding program is to develop a self sustaining,genetically diverse population.Due to the common problems about sexual incompatibility and a limited number of captive born males that breed naturally,artificial insemination (AI) has become a critical genetic management tool.It is common practice,however,to combine natural mating and AI using semen from non breeding males.From 1998 to 2000 at the Wolong breeding facility,12 of 18 (66.7%) females produced 20 cubs following combined natural mating and AI.The objective of this study was to determine the efficiency of AI without natural breeding.In 1998 and 2000,seven females were anesthetized for transcervical AI on two consecutive days.Ejaculates from six males were collected by electroejaculation,diluted in an egg yolk diluent containing 0% or 4% glycerol and used either fresh or following cold storage at 4℃ (for 24 or 48 h) or cryopreservation using the pellet freezing method.Mean (±SEM) ejaculate traits in six male sperm donors were:ejaculate volume,3.3±0.5 ml;sperm concentration,1,429.8±235.4×10 6/ml;sperm motility,81.7±2.1%;progression (0～5,5=best),3.1±0.1;and normal sperm,79.3±9.2%.For AI (n = 14) in seven females,mean inseminate traits were:spermic volume inseminated,2.4±0.3 ml;sperm motility,73.5±2.9%;progression,2.5±0.1;and total motile sperm inseminated/AI,684.2±118.2×10 6.Four of seven (57.1%) females became pregnant and produced five cubs of which four survived.Mean gestation and litter size was 131.5±9.7 days and 1.3±0.3 cubs/litter,respectively.These results indicate that the efficiency of AI is sufficient for recovering valuable genes from non breeding individuals to enhance genetic diversity in the ex situ population of giant pandas.
文摘By using investigative means of marketing, this paper collects and analyzes the data of English demand of employment units for newly-graduated .graduates. Its research and analysis include six parts, namely, an overall analysis, an analysis of English demand according to the kind of employment units, according to trade, according to job, according to specialty and the five skills of ＂listening, speaking, reading, writing and translation＂. The supplied data tell the reality of the current English demand of employment units in China, which would also reflect the trend in the coming few years. The analysis of the data embodies the reality of college English teaching, discusses its advantages and disadvantages and puts forward reasonable suggestions on college English teaching and evaluation system.
基金Project(201412016)supported by the Special Fund for Public Projects of National Administration of Surveying,Mapping and Geoinformation of ChinaProject(51174287)supported by the National Natural Science Foundation of China
文摘Numerous coal fires burn underneath the Datong coalfield because of indiscriminate mining.Landsat TM/ETM,unmanned aerial vehicle（UAV）,and infrared thermal imager were employed to monitor underground coal fires in the Majiliang mining area.The thermal field distributions of this area in 2000,2002,2006,2007,and 2009 were obtained using Landsat TM/ETM.The changes in the distribution were then analyzed to approximate the locations of the coal fires.Through UAV imagery employed at a very high resolution（0.2 m）,the texture information,linear features,and brightness of the ground fissures in the coal fire area were determined.All these data were combined to build a knowledge model of determining fissures and were used to support underground coal fire detection.An infrared thermal imager was used to map the thermal field distribution of areas where coal fire is serious.Results were analyzed to identify the hot spot trend and the depth of the burning point.
文摘[Objective] This study was to find out the artificial diet formula for Erigoni- dium graminicolum （Sundevall） to realize its indoor artificial breeding. [Method] Using orthogonal decomposition method, the diet most suitable for the normal and quick growth of Erigonidium graminicolum （sundevall）, was developed by adding different species and different proportions of fresh insects to the artificial diet based on the formula of total nutrient solution proposed by Zhao Jing-zhao. [Result] The most suit- able formula for the development and growth of Erigonidium graminicolum （Sundevall） is 10 ml of egg white, 2 g of honey, 2 g of sucrose, 10 ml of water, 5 g of Ci- cadella viridis, moderate amount of cornmeal, compound vitamin B1 and vitamin C1. [Conclusion] The development of new type artificial diet can provide timely and nec- essary material premise for its large-scale indoor propagation.
文摘This paper introduces the recent highly significant activity of China Oilfield Services Ltd. （COSL） in the South China Sea, where COSL conducted pretrial drilling in June of 2008. The paper discusses some key research and new practices which led to the fabrication of related equipment which was evaluated in the trial. The market for deepwater drilling in the world has grown over the past 10 years but there are few drilling vessels or platforms suitable for drilling in deepwater or super deepwater. China needs equipment capable of deepwater drilling operations. COSL has some semisubmersible platforms, but they are only considered suitable for operations in water depths less than 475 m. An enabling technology, referred to as an artificial seabed, has been under development by COSL since 2004, and it applies the research results and experiences of many experts in deepwater drilling. COSL hopes this technology will allow drilling to depths of approximately 1 000-1 500m with its current platforms. The paper presents research progress and improvements in fabrication and necessary upgrades to equipment for extending deepwater drilling. The pretrial well was executed at a water depth of nearly 500m. COSL will drill the trial well around 2009 at the same location in the South China Sea.
基金Project(20100480964) supported by China Postdoctoral Science FoundationProjects(2002AA420090,2008AA092301) supported by the National High Technology Research and Development Program of China
文摘Plenty of dams in China are in danger while there are few effective methods for underwater dam inspections of hidden problems such as conduits,cracks and inanitions.The dam safety inspection remotely operated vehicle(DSIROV) is designed to solve these problems which can be equipped with many advanced sensors such as acoustical,optical and electrical sensors for underwater dam inspection.A least-square parameter estimation method is utilized to estimate the hydrodynamic coefficients of DSIROV,and a four degree-of-freedom(DOF) simulation system is constructed.The architecture of DSIROV's motion control system is introduced,which includes hardware and software structures.The hardware based on PC104 BUS,uses AMD ELAN520 as the controller's embedded CPU and all control modules work in VxWorks real-time operating system.Information flow of the motion system of DSIROV,automatic control of dam scanning and dead-reckoning algorithm for navigation are also discussed.The reliability of DSIROV's control system can be verified and the control system can fulfill the motion control mission because embankment checking can be demonstrated by the lake trials.
文摘Background The CRUSADE, ACTION and ACUITY-HORIZONS scores are commonly used for predicting in-hospital major bleeding events in patients with acute coronary syndrome （ACS）, but the homogeneous nature of these models＇ population limits simple ex- trapolation to other local population. We aimed to compare the performance of the three risk models in Chinese patients. Methods We evaluated the performance of the three predicting scores for predicting in-hospital major bleeding events defined by thrombolysis in myocar- dial infarction （TIMI） serious （major and minor） episodes, in a cohort of Chinese ACS patients with either non-ST-elevation ACS （NSTE-ACS） or ST-elevation myocardial infarction （STEMI）. Calibration and discrimination of the three risk models were evaluated by the Hosmer-Lemeshow test and C-statistic, respectively. We compared the predictive accuracy of the risk scores by the Delong non-parametric test. Results TIMI serious bleeding rate was 1.1% overall （1.9% and 0.86% for STEMI and NSTE-ACS, respectively）. The CRUSADE, ACTION and ACUTIY-HOR/ZONS scores showed an adequate discriminatory capacity for major bleeding： in overall patients, the C-statistic was 0.80, 0.77, and 0.70, respectively; in NSTE-ACS patients, the C-statistic was 0.73, 0.72, and 0.64, respectively; in STEMI patients, the C-statistic was 0.91, 0.92, and 0.75, respectively. The C-statistic for the ACUITY-HORIZONS model was significantly lower than those of the CRUSADE and ACTION scores for the prediction of TIM/serious bleeding in overall patients （compared with CRUSADE, z = 3.83, P = 0.02; compared with ACTION, z = 3.51, P = 0.03）; in NSTE-ACS patients （compared with CRUSADE, z = 2.37, P = 0.01; compared with ACTION, z = 2.11, P = 0.04）, and in STEMI patients （compared with CRUSADE, z = 2.6.77, P = 0.02; compared with AC- TION, z = 7.91, P = 0.002）. No differences were observed when the CRUSADE and ACTION models were compared to each other, regard- less of overall patients （z = 0.68, P = 0.31） and both of ACS types （NSTE-ACS, z = 0.52, P = 0.60）, and STEMI patients （z = 0.36, P = 0.74）. However, the three risk scores all overestimated the absolute major bleeding risk in each risk stratification in our study. For example, the predicted rate of CRUSADE score at high risk stratification was 11.9% vs. an actual rate of 5.3%. Conclusions The CRUSADE and AC- TION scores had a greater calibration and discrimination for in-hospital major bleeding compared with the ACUITY-HORIZONS score in Chinese patients with ACS undergoing PCI. However, they all overestimated the bleeding risk rate for Chinese populations. Calibration of these risk scores would be useful for the generalization in Chinese populations.
文摘In recent years, our department has adopted a catgut point-embedding therapy in the treatment of 76 cases of chronic ulcerative colitis, with quite good therapeutic effects. The following is a report of it.Clinical DataOf 76 cases we treated, 32 were male, and 44 female, with the ages ranging from 23 to 65 years and the duration of illness from 6 months to 20 years.All the cases complained of chronic diarrhea, most of them had mucous and blood stool, and some had tenesmus. Sigmoscopic findings showed that all the cases had varying degrees of colic mucosal congestion and edema, fragile mucosa easy to bleed upon touching, or rough mucosa with multiple ulcers varying in size, shape, and depth.
文摘Objective: To evaluate the benefits and risks of tight glycemia control (TGC) versus conventional glucose control (CGC) in critically ill brain-injured adults. Methods: We performed meta-analysis by systematically searching PubMed, EMBASE, OVID, ScienceDirect, Web of Science, CNKI, Wanfang Data, and CQVIP databases to retrieve RCTs in any languages. We used Review Manager to perform meta-analysis. Odds ratios (ORs) or weighted mean differences (WMDs) with 95% confidence intervals (CIs) were calculated in analyses. Results: Twenty-six RCTs with a total of 3,759 participants were included in this meta-analysis. In-hospital mortality showed significant dissimilarity between TGC and CGC groups with OR of 0.76 (95%CI 0.58, 0.99). However, in terms of overall mortality and long-term neurological severity outcome, it didn't show differences with ORs of 0.93 (95%CI 0.79, 1.10) and 1.15 (95%CI 0.96, 1.37). There were also discrepancies in infection rate and ICU length of stay with OR of 0.51 (95%CI 0.42, 0.62) and WMD of -2.37 (95%CI -2.99, -1.74). Significances were observed in hypoglycemia events with ORs of 6.24 (95%CI 4.83, 8.07) and 2.73 (95%CI 2.56, 2.91) using two methods. Conclusion: In critically ill brain injury, TGC did not show beneficial effects on reducing overall mortality and long term neurological outcome, but it increased the risk of hypoglycemia.
基金National Natural Science Foundation of China(No.51005176)Research Fund for the Doctoral Program of Higher Education of China(No.20100201120003)
文摘Electroencephalogram (EEG) is an efficient tool in exploring human brains. It plays a very important role in diagnosis of disorders related to epilepsy and development of new interaction techniques between machines and human beings,namely,brain-computer interface (BCI). The purpose of this review is to illustrate the recent researches in EEG processing and EEG-based BCI. First,we outline several methods in removing artifacts from EEGs,and classical algorithms for fatigue detection are discussed. Then,two BCI paradigms including motor imagery and steady-state motion visual evoked potentials (SSMVEP) produced by oscillating Newton's rings are introduced. Finally,BCI systems including wheelchair controlling and electronic car navigation are elaborated. As a new technique to control equipments,BCI has promising potential in rehabilitation of disorders in central nervous system,such as stroke and spinal cord injury,treatment of attention deficit hyperactivity disorder (ADHD) in children and development of novel games such as brain-controlled auto racings.
