快速确定三棱镜镜片的加工中心

三棱镜眼镜的加工装配与普通眼镜的不同之处是确定带棱镜度的镜片加工中心,本文重点介绍了快速确定三棱镜镜片加工中心的两种方法,以便简单、熟练地掌握三棱镜眼镜的加工装配,并使装配出的眼镜符合配装眼镜的国家标准。

透镜移位对眼作用分析

大家都知道，凸透镜和凹透镜偏离光心便可产生棱镜效果，即P=F·C。P为棱镜度(△)，F为透镜顶焦度(D)，C为偏心距离(cm)，凸透镜基底在光心，凹透镜尖端在光心。例如：+10DS光心内移0．5cm，其棱镜效果为；P=F．C=10x0．5=5^△基底向内(BI)。

Text Difficulty,Working Memory Capacity and Mind Wandering During Chinese EFL Learners’Reading

This experimental study investigated how text difficulty and different working memory capacity(WMC)affected Chinese EFL learners’reading comprehension and their tendency to engage in task-unrelated thoughts,that is,mind wandering(MW),in the course of reading.Sixty first-year university non-English majors participated in the study.A two-factor mixed experimental design of 2(text difficulty:difficult and simple)×2(WMC:high/large and low/small)was employed.Results revealed that 1)the main and interaction effects of WMC and text difficulty on voluntary MW were significant,whereas those on involuntary MW were not;2)while reading the easy texts,the involuntary MW of high-WMC individuals was less frequent than that of low-WMC ones,whereas while reading the difficult ones,the direct relationship between WMC and involuntary MW was not found;and that 3)high-WMC individuals had a lower overall rate of MW and better reading performance than low-WMC individuals did,but with increasing text difficulty,their rates of overall MW and voluntary MW were getting higher and higher,and the reading performance was getting lower and lower.These results lend support to WM theory and have pedagogical implications for the instruction of L2 reading.

Health-related quality of life of 256 recipients after liver transplantation

AIM:To investigate health-related quality of life(HRQoL) and psychological outcomes in 256 adults who had undergone liver transplantation(LT).METHODS:A stratified random sampling method was used in this follow-up multicenter study to select a representative sample of recipients undergoing either living donor liver transplantation(LDLT) or deceased donor liver transplantation(DDLT).HRQoL was measured by using the Chinese version of Medical Outcome Study Short Form-36(SF-36),and psychological outcomes by using the beck anxiety inventory(BAI) and the self-rating depression scale(SDS).Clinical and demographic data were collected from the records of the Chinese Liver Transplant Registry and via questionnaires.RESULTS:A total of 256 patients were sampled,including 66(25.8%) receiving LDLT and 190(74.2%) undergoing DDLT;15(5.9%) recipients had anxiety and four(1.6%) developed severe depression after the operation.Compared with LDLT recipients,DDLT patients had higher scores in general health(60.33 ± 16.97 vs 66.86 ± 18.42,P = 0.012),role-physical(63.64 ± 42.55 vs 74.47 ± 36.46,P = 0.048),roleemotional(61.11 ± 44.37 vs 78.95 ± 34.31,P = 0.001),social functioning(78.60 ± 22.76 vs 88.16 ± 21.85,P = 0.003),vitality(70.30 ± 15.76 vs 75.95 ± 16.40,P = 0.016),mental health(65.88 ± 12.94 vs 71.85 ± 15.45,P = 0.005),physical component summary scale(PCS,60.07 ± 7.36 vs 62.58 ± 6.88,P = 0.013) and mental component summary scale(MCS,52.65 ± 7.66 vs 55.95 ± 10.14,P = 0.016).Recipients > 45 years old at the time of transplant scored higher in vitality(77.33 ± 15.64 vs 72.52 ± 16.66,P = 0.020),mental health(73.64 ± 15.06 vs 68.00 ± 14.65,P = 0.003) and MCS(56.61 ± 10.00 vs 54.05 ± 9.30,P = 0.037) than those aged ≤ 45 years.MCS was poorer in recipients with than in those without complications(52.92 ± 12.21 vs 56.06 ± 8.16,P = 0.017).Regarding MCS(55.10 ± 9.66 vs 50.0 ± 10.0,P < 0.05) and PCS(61.93 ± 7.08 vs 50.0 ± 10.0,P < 0.05),recipients scored better than the Sichuan general and had improved overall QoL compared to patients with chronic diseases.MCS and PCS significantly correlated with scores of the BAI(P < 0.001) and the SDS(P < 0.001).CONCLUSION:Age > 45 years at time of transplant,DDLT,full-time working,no complications,anxiety and depression were possible factors influencing postoperative HRQoL in liver recipients.

Effects of multidisciplinary exercise management on patients after percutaneous coronary intervention:A randomized controlled study

Objectives To explore the effectiveness of the mobile app-based multidisciplinary exercise management on patients who receive percutaneous coronary intervention(PCI).Methods From January to October 2020,54 patients after PCI were randomly assigned to the intervention group(n=27)and the control group(n=27).The intervention group received the mobile app-based multidisciplinary exercise management,whereas the control group received routine care.The patients after PCI began to take intervention one month after the operation,and the intervention lasted for two months.Before and after the intervention,6-Minute Walking Distance was used to evaluate the patient’s exercise tolerance,and the patient’s exercise compliance was evaluated according to the patient’s exercise status recorded by the mobile app.The cognitive questionnaire on knowledge about PCI treatment for Coronary Heart Disease,the Self-efficacy for Chronic Disease Scale and the Perceived Social Support Scale were used to evaluate patients’disease-related cognition,self-efficacy and perception of social support.This study was registered on Clinical Trials.gov with registration number ChiCTR2000028930.Results Totally 51 patients after PCI who completed this study(25 patients in the intervention group and 26 patients in the control group)were included in the analysis.After 2 months of intervention,the exercise compliance of patients in the intervention group was better than that in the control group.And 6-Minute Walking Distance(469.36±57.48 vs.432.81±67.09),and the scores of knowledge of PCI treatment for coronary heart disease(52.64±9.82 vs.42.42±8.54),Self-efficacy for Chronic Disease Scale(42.40±8.04 vs.36.88±7.73)and Perceived Social Support Scale(74.04±5.73 vs.66.69±6.86)in the intervention group were higher than those in the control group with statistical significance(P<0.05).Conclusions The multidisciplinary exercise management based on the mobile app can effectively improve exercise tolerance,exercise compliance,disease-related cognition,self-efficacy,and perception of social support during exercise training for patients after PCI.

Quality of life and psychological outcome of donors after living donor liver transplantation

AIM: To investigate the health related quality of life (HRQoL) and psychological outcome of donors after living donor liver transplantation. METHODS: Participants were 92 consecutive liver transplant donors who underwent hepatectomy with- out middle hepatic vein at West China Hospital of Sichuan University between January 2007 and Sep- tember 2010. HRQoL was measured using the Chinese version of the Medical Outcomes Study Short Form-36 (SF-36), and psychological symptoms were measured using the Symptom Checklist-90-Revised (SCL-90-R). Data collected from donors were compared to previ- ously published data from the general population. Clin- ical and demographic data were collected from medical records and questionnaires.RESULTS: The general health score of the SF-36 was significantly lower in females (59.78 ± 12.25) than in males (75.83 ± 22.09). Donors more than 40 years old scored higher in social functioning (85.71 ± 14.59) and mental health (82.61 ± 20.00) than those younger than 40 (75.00 ± 12.13, 68.89 ± 12.98; social func- tioning and mental health, respectively). Donors who had surgery more than two years prior to the study scored highest in physical functioning (P = 0.001) and bodily pain (P = 0.042) while those less than one year from surgery scored lowest. The health of the liver recipient significantly influenced the general health (P = 0.042), social functioning (P = 0.010), and role- emotional (P = 0.028) of donors. Donors with full-time employment scored highest in role-physical (P = 0.005), vitality (P = 0.001), social functioning (P = 0.016), mental health (P < 0.001), the physical component summary scale (P < 0.001), and the mental compo- nent summary scale (MCS) (P < 0.001). Psychological measures indicated that donors were healthier than the general population in obsessive-compulsive behav- ior, interpersonal sensitivity, phobic anxiety, and para- noid ideation. The MCS of the SF-36 was significantly correlated with most symptom scores of the SCL-90-R. CONCLUSION: HRQoL and psychological outcome were favorable in living liver transplant donors after donation. Specifically, gender, age, time since opera- tion, recipient health condition, and employment after donation, influenced postoperative quality of life.

New Optical Triangulation and Digital Image Processing in Measurement

In this paper,a new direct optical triangulation(DOT) for measuring theout-of-plane displacement is given.In order to state its principle,DOT is used to measure a micro-displacement of a rigid body,and at the same time,the method of digital image processing is also given.