Addressing the challenge of traditional physical/semi physical simulation methods being difficult to achieve full process and full element simulation of extravehicular activities,virtual reality technology is utilized to break through the limitations of physical environments and establish a virtual reality simulation system for extravehicular activities.Based on the application characteristics of space station extravehicular activity engineering,with the goal of improving system practicality and usability,integrating the visual immersion of virtual images,the ontology of real operation,and the consistency of virtual and real space perception,a three-dimensional scene simulation,multi-mode joystick interaction paradigm,continuous operation actions simulation of extravehicular operations,and interactive operation virtual/real space consistency method that were proposed and designed for the realistic visual perception and extravehicular operation.The system has been successfully applied to astronaut training,program validation,joint exercise,and flight control support for sixteen extravehicular activities from SZ-12 to SZ-18.The results showed that the complete reproduction of the static/dynamic realistic comprehensive scene was achieved on the ground for the human-machine operation in the entire process of extravehicular activity,and the system is an essential and important means of ground simulation for extravehicular activity.

Exposure to acceleration can have Various effects on the physiology,psychology,and performance of human.With the increasing density and complexity of China's space mission,and the significant differences between deep space exploration and near Earth orbit flight,unprecedented challenges have been posed to the emotions of astronauts and the ability of human-machine collaboration to complete complex operational tasks in special environments.Similarly,with the continuous development of high-performance fighter jets,air combat operation are becoming increasingly complex,and the payload generated by the aircraft is also increasing.The requirements for the anti-overload ability of fighter pilots are also becoming higher and higher.A review of recent studies on physiological and cognitive load of acceleration exposure on humans.The research on human physiology is relatively systematic,but there is limited research on cognitive load.The corresponding evaluation methods,assessment methods,and assessment systems are not comprehensive enough,and there is a lack of mechanistic analysis.Multimodal analysis and modeling are even rarer.Further in-depth research is needed on the cognitive load and evaluation techniques of overweight environment in the future.This article provides reference for the selection,adaptive training,and related experimental research of overweight endurance for astronauts and pilots in the future.

Objective Analysis of the effects of relaxation training combined with exercise intervention in patients with colorectal cancer undergoing chemotherapy,aiming to provide reference for clinical nursing practice.Methods Using a convenience sampling method,80 colorectal cancer patients undergoing chemotherapy in the oncology ward of a tertiary A hospital in Changzhou,Jiangsu Province from November 2022 to November 2023 were selected as study subjects.Patients were divided into an experimental group and a control group using a random number table method,with 40 patients in each group.The experimental group received relaxation training combined with exercise interventionin addition to routine care provided to the control group.The control group received routine care.Differences in 6-minute walking distance,anxiety,depression and quality of life scores before and after six chemotherapy cycles were compared between the 2 groups.Results Finally,70 patients completed the intervention,with 35 patients in each group.After the intervention,there were differences in 6-minute walking distance,anxiety scores,depression scores,and overall health status scores between the 2 groups were all statistically significant(P＜0.001).Conclusion Relaxation training combined with exercise intervention can maintain exercise endurance in colorectal cancer patients undergoing chemotherapy and alleviate anxiety and depression to some extent,helping to improve patients' quality of life.

Objective Analysis of the effects of relaxation training combined with exercise intervention in patients with colorectal cancer undergoing chemotherapy,aiming to provide reference for clinical nursing practice.Methods Using a convenience sampling method,80 colorectal cancer patients undergoing chemotherapy in the oncology ward of a tertiary A hospital in Changzhou,Jiangsu Province from November 2022 to November 2023 were selected as study subjects.Patients were divided into an experimental group and a control group using a random number table method,with 40 patients in each group.The experimental group received relaxation training combined with exercise interventionin addition to routine care provided to the control group.The control group received routine care.Differences in 6-minute walking distance,anxiety,depression and quality of life scores before and after six chemotherapy cycles were compared between the 2 groups.Results Finally,70 patients completed the intervention,with 35 patients in each group.After the intervention,there were differences in 6-minute walking distance,anxiety scores,depression scores,and overall health status scores between the 2 groups were all statistically significant(P＜0.001).Conclusion Relaxation training combined with exercise intervention can maintain exercise endurance in colorectal cancer patients undergoing chemotherapy and alleviate anxiety and depression to some extent,helping to improve patients' quality of life.

Objective:To evaluate the effectiveness of interventional treatment for neonatal critical pulmonary stenosis(NCPS).Methods:Clinical data of 12 neonates with NCPS who received percutaneous balloon pulmonary valvuloplasty (PBPV) from January 2016 to December 2019 in Department of Cardiology, Shenzhen Children′s Hospital were summarized and analyzed.The collected data included transthoracic echocardiography (TTE), percutaneous oxygen saturation (SPO 2), relevant data on interventional surgery, and follow-up results. Results:All 12 neonates with NCPS received PBPV successfully.The postoperative pressure difference between the right ventricle and the pulmonary artery ranged from 8 to 35 mmHg[(20±7) mmHg, 1 mmHg=0.133 kPa]. The postoperative SPO 2 ranged from 74%-100%[(93.0±5.9)%]. Three neonates with NCPS received Blalock-Taussig (B-T) shunt.One neonate with NCPS developed supraventricular tachycardia during the operation.There was no death for these 12 neonates with NCPS. Conclusions:Interventional treatment of neonates with NCPS could achieve a better effect and be employed as the first treatment option.Some neonates with NCPS would require cardiac B-T shunt or patent ductus arteriosus stent implantation.

Objective To design and apply the nursing quality management system of our hospital in order to strengthen nursing informationization construction, and improve management efficiency of nursing quality. Methods Based on the original design of nursing management system, the quality management system which take nursing as the main part was researched and developed by us and applied to the clinical. Our nursing management department combined PDCA cycle with our nursing quality management, and developed nursing unit quality evaluation criteria, each ward were checked by evaluating group of nursing quality management, the analysis and corrective measures should be asked to put forward. Results From July to December in 2016, nursing accidents, pressure ulcer, tumbling, pipe slippage, medication, errors and all adverse events incidence compared with 2015 year dropped 60.00％(0.03/0.05), 43.33％ (0.13/0.30), 50.00％ (0.04/0.08), 40.00％ (0.04/0.10), 33.33％ (0.01/0.03),43.85％(0.25/0.57), and all adverse events in 2016 compared to the period of 2015 had statistically difference (χ2=7.266, P<0.05), and the problem rectification rate was significantly higher than before(χ2=-3.212--2.637,P<0.05). Conclusion The construction and application of nursing quality management system realized the informationization and resource sharing of nursing quality management, it will help the quality of management to upgrade continuously and improve the efficiency of nursing quality management.

Objective To prepare quercetin ( QUE) loaded chitosan nanoparticles ( CS-NPs), evaluate its physicochemical properties and antioxidation activity in vitro.Methods Quercetin chitosan nanoparticles were prepared by ionic crosslinking method and self-assembly method.The preparation method was optimized using entrapment efficiency (EE), drug loading (DL) and size as indexes.The best formulation and preparation conditions were optimized by orthogonal test based on single-factor test, evaluation indicator as particle size and EE.The physicochemical properties of the obtained QUE-CS-NPs were characterized by the following methods: the transmission electron microscope (TEM), dynamic light scattering (DLS) analysis for morphology, size distribution and Zeta potential.In vitro release behavior in 0.5% SDS solution was evaluated by dialysis tube method.In vitro antioxidant activity assays were performed by evaluating the abilities of the microspheres for hydroxide radicals and superoxide anions .Results TEM results revealed QUE-CS-NPs with round and uniform.Particle-size analysis showed that the diameters and Zeta potential of the QUE-CS-NPs were (282.9 ±20) nm and (30.5 ±2) mV, with uniform distribution (polydispersity below 0.185).DL and EE of QUE-CS-NPs were (8.81 ±0.65) %and (80.02 ±1.04) %, respectively.QUE-CS-NPs showed extended administration times with 66.2% cumulative release within 72 h.QUE-CS-NPs showed pronounced antioxidant activity and a concentration dependent, even more substantial than that of pure QUE.Conclusion QUE-CS-NPs show a good size, sustain release effect and pronounce antioxidant activity.

Objective To assess the value of quantitative color Doppler sonography in patients with systemic lupus erythematosus (SLE). Methods The right renal in 21 patients with SLE and 22 normal subjects were examined with Philips IU22 ultrasonic diagnostic device. Resistence index (RI) of interlobar artery and interlobular artery were measured with color Doppler sonography, vascularity index (VI), flow index (FI) and vascularization flow index (VFI) which reflecting the renal cortical blood flow were calculated with quantitated analysis software. All the parameters between two groups were compared and analyzed. Results The color signals of renal cortical blood flow in patients with SLE were inferior to those of the normal group, especially in the area near the edge of renal. No statistical difference of RI was found between the two groups (P>0.05), while VI, FI and VFI in SLE group were significantly lower than those of the normal group (VI, VFI, P<0.01, FI, P=0.01). Conclusion Color Doppler sonography combined with blood flow quantitative technique provide a helpful, sensitive and convenient tool to detecte the renal changes in SLE patients.

The pharmacological activity of Mycena dendrobii Fan et Guo, a new species of endophytic fungus was studied. It was revealed that the mycelia methanol extracts and the fermentation liquid ethanol extracts of Mycena dendrobii showed anglgesic effect to mice, which have the correlations to that of the traditional Chinese medicine ‘shihu’. The fermentation liquid ethanol extracts of Mycena dendrobii showed excitation effect to central nervous system of mice. Then the effective parts of anglgesic effect was determined.

AIM: To develope a reversed-phase high performance liquid chromatographic method for the quantitative determination of chlorogenic acid and caffeic acid in Shegan Kangbingdu Injection. METHODS: The operation was carried out in the Kromasil ODS column with the mobile phase consisting of a mixture of water-methanol-acetonitril aceti acid(95∶10∶5∶2,v/v),in which the flow rate of 1.0 mL/min and UV detection wavelength at 326 nm were set to determine the contents of chlorogenic acid and caffeic acid. RESULTS: There were good linear relations between the concentrations and the peak-areas of chlorogenic acid and caffeic acid.The relative standard deviation of peak areas for chlorogenic acid or caffeic acid were 0.60%,0.32%,respectively.The two kinds of standard solutions were both stable in 16 h(RSD=0.54% for CGA,0.11% for CFA).The average recovery was 100.1%,99.6% for CGA,CFA,repectively.The detectable limit(S/N=3)was 0.012,0.020 mg/L,and the quantitative limit (S/N=10) was 0.037,0.052 mg/L,repectively. CONCLUSION:The method is simple,sensitive,rapid and accurate,and can be used for the quality control of Shegan Kangbingdu Injection