试析中国外汇储备管理存在的风险及对策

截至2008年4月末,中国的外汇储备已经增加到1.76万亿美元,比东北亚其他国家和地区外汇储备的总和还多,并且这个数字实际上已经超过了世界主要七大工业国(包括美国、日本、英国、德国、法国、加拿大、意大利,简称G7)的总和。巨额的外汇储备加剧了汇率、财政、通胀和政治等外汇管理风险,而要规避这些外汇管理风险需要实施如主权财富基金的战略投资、藏汇于民、外汇储备多元化和扩大内需等有效措施。

Feasibility study of the transient electromagnetic method for chamber blasting misfire detection and recognition

In this paper,transient electromagnetic method was used to carry out the feasibility study on the detection and recognition of chamber blasting misfire.Firstly,an electromagnetic background field was established in the test;secondly,a benign conductor was preset in the chamber,and then the background field was eliminated after the electromagnetic field was measured;thirdly,the transient electromagnetic field was measured again after blasting;at last,the chamber blasting misfire was detected and recognized by comparing the change of eddy current field of the preset benign conductor before and after blasting.The test results showed that:When the buried depth of aluminum box target was no more than 30 m,transient electromagnetic method can clearly identify the position of the aluminum box;when the buried depth of aluminum box was more than30 m,the buried depth and position of the aluminum box was not sure due to the unknown level of secondary eddy current field generated by aluminum box.

Endoscopic occlusion with silicone spigots for the closure of refractory esophago-bronchiole fistula after esophagectomy

A 65-year-old man with cT1bN0M0 stage I middle thoracic esophageal cancer underwent subtotal esophagectomy and gastric tube reconstruction through the posterior mediastinal route after preoperative carbon-ion radiotherapy and chemotherapy in a clinical trial. Anastomotic leakage occurred, but it spontaneously improved. At six months after the operation, he was rehospitalized with a cough and dysphagia. An esophago-bronchiole fistula and stenosis of the gastric tube were observed. He first underwent stent placement in the gastric tube. Two weeks later, the syringeal epithelium was burned by argon plasma coagulation after stent removal. Endoscopic occlusion was then performed for the fistula with two guidewire-assisted silicone spigots. Two weeks later, he was discharged on an oral diet, and he has not developed recurrence of the fistula or cancer for three years. This is the first report of endoscopic occlusion with a guidewire-assisted silicone spigot through the esophagus.

Sand Storage, Extending the Shelf-Life of Fresh Sweetpotato Roots for Home Consumption and Market Sales

Uni-modal rainfall pattern has long dry spell wherein sweetpotato is scarce, expensive but cheap at harvest. The crop is mostly consumed, processed or sold. Extending shelf-life of roots is crucial for Malawi and Northern Ghana as the crop has high value. Trials were conducted in the countries at the community level. In the dry season, temperature is cool in Malawi while warm in Ghana, but thru harmattan, the night is cool with low relative humidity. In Malawi, orange-fleshed sweetpotato Zondeni var., white and yellow types were assessed in three types of storage, Afghan ventilated pit store, storage in dry sand of pit-steps, and of a granary In Ghana, local moistened heap and sandbox were compared. In Malawi, weight losses were calculated relative to the quantity stored at start, it was not cumulative. At 1.5 months no significant difference was among treatments. By 3.5 months the pit-steps method emerged to be superior and continued to 6.5 months. Losses in granary were due to shriveling, in the pit-stepsdue to termites and rats, and in ventilated pit due to termites, rats and Java black rot. Sprouting was high in pit-steps, but it was simply removed and roots returned to storage. At 6.5 months, the beta-carotene of Zondeni roots was traceable. Farmers gained high price when selling them as roots were scarce. Women favored the pit-steps because it was manageable. In Ghana, the sandbox was superior to local moistened heap. Methods designed were suitable for home consumption, but will require modification for commercialization.

Critical Approach to Methods of Glacier Reconstruction in High Asia and Discussion of the Probability of a Qinghai-Xizang (Tibetan) Inland Ice

This overview discusses old and new results as to the controversy on the past glacier extension in High Asia, which has been debated for 35 years now. This paper makes an attempt to come closer to a solution. H.v. Wissmann's interpretation (1959) of a small-scale glaciation contrasts with M. Kuhle's reconstruction (1974) of a large-scale glaciation with a 2.4 million km2 extended Qinghai-Xizang (Tibetan) inland glaciation and a Himalaya-Karakorum icestream network. Both opinions find support but also contradiction in the International and Chinese literature (Academia Sinica). The solution of this question is of supraregional importance because of the subtropical position of the concerned areas. In case of large albedo-intensive ice surfaces, a global cooling would be the energetical consequence and, furthermore, a breakdown of the summer monsoon. The current and interglacial heat-low above the very effective heating panel of the Qinghai-Xizang (Tibetan) Plateau exceeding 4000 m, which gives rise to this monsoon circulation, would be replaced by the cold-high of an inland ice. In addition, the plate-tectonically created Pleistocene history of the uplift of High Asia — should the occasion arise up to beyond the snowline (ELA) —would attain a paleoclimatically great, perhaps global importance. In case of a heavy superimposed ice load, the question would come up as to the glacio-isostatic interruption of this primary uplift. The production of the loesses sedimentated in NE-China and their very probable glacial genesis as well as an eustatic lowering of the sea-level by 5 to 7 m in the maximum case of glaciation are immediately tied up with the question of glaciation we want to discuss. Not the least, the problems of biotopes of the sanctuary-centres of flora and fauna, i.e., interglacial re-settlement, are also dependent on it. On the basis of this Quaternary- geomorphological-glaciological connection, future contributions are requested on the past glaciation, the current and glacial permafrost table and periglacial development, the history of uplift, and the development of Ice Age lakes and loess, but also on the development of vegetation and fauna in High Asia.

Relationship between Dysglycemia and Carotid Atherosclerosis in Tibetan Population

People with dysglycemia are at high risk for atherosclerotic diseases. This study aims at investigating the atherosclerotic vascular damage in dysglycemia and its metabolic origin in Tibetan population.

Dynamic tracking and mobility analysis of single GLUT4 storage vesicle in live 3T3-L1 cells

Glucose transporter 4 (GLUT4) is responsible for insulin-stimulated glucose transporting into the insulin-sensitive fat and muscle cells. The dynamics of GLUT4 storage vesicles (GSVs) remains to be explored and it is unclear how GSVs are arranged based on their mobility. We examined this issue in 3T3-L1 cells via investigating the three-dimensional mobility of single GSV labeled with EGFP-fused GLUT4. A thin layer of cytosol right adjacent to the plasma membrane was illuminated and successively imaged at 5 Hz under a total internal reflection fluorescence microscope with a penetration depth of 136 nm. Employing single particle tracking, the three-dimensional subpixel displacement of single GSV was tracked at a spatial precision of 22 nm. Both the mean square displacement and the diffusion coefficient were calculated for each vesicle. Tracking results revealed that vesicles moved as if restricted within a cage that has a mean radius of 160 nm, suggesting the presence of some intracellular tethering matrix. By constructing the histogram of the diffusion coefficients of GSVs, we observed a smooth distribution instead of the existence of distinct groups. The result indicates that GSVs are dynamically retained in a continuous and wide range of mobility rather than into separate classes.

近代康藏青藏之界划问题与英国“大西藏”的战略企图

Tibet与"西藏"相互间有何区别?"大西藏"实质如何?这些问题不能不令人关注。西藏行政区域本已确定,西康作为地理的概念也很清楚,但在"大西藏"下却成为问题,引发了国人关于康藏青藏界划问题和"康"地性质的讨论。英国有意以地理名词Tibet混淆行政区域名词"西藏",提出一个囊括整个青藏高原在内的"大西藏",有意将Tibet称为"Thibet",并进而划分西藏为"外藏",西康为"内藏"。显然,作为行政区域名词的"西藏"应译为Histsang,与青海之Ch’ing-hai、西康之Hsikang对应。

论《黄帝内经》中五脏之间的调控关系

藏象是中医理论体系的重要组成部分,而五脏是藏象理论的核心范畴。在收集整理《黄帝内经》中关于五脏理论原文的基础上,重点从五行调控、四时阴阳调控、气化调控、官能调控角度分析中医五脏之间的调控关系,阐明五脏功能活动之间的整体性、动态性是人体生命活动正常、生命力旺盛的核心基础,有助于从宏观角度理解中医五脏理论之间的逻辑关系结构。

黑石号上的“宫廷瓷器”——中古沉船背后的政治经济史

公元9世纪沉没的西亚货船“黑石号”上,载有两件被怀疑来自唐代宫廷的瓷器,即“盈”字款绿釉碗、“进奉”款白釉绿彩盘,它们被认为从扬州出口。这两件瓷器的出现,和中唐时期屡见记载的宫廷交易有关。此时期的宫廷交易在供军压力下也出现了新的内容,这背后体现唐廷和诸藩镇间的角力。从德宗到宣宗统治期长达七十余年的所谓“钱重货轻”(铜钱流通量不足、物价低落)现象,引发唐廷和士大夫群体间广泛的讨论,此现象固然有社会经济的背景,但不能忽视政治宣传的因素。从士大夫讨论“钱重货轻”的文本,到宪宗的决策,可以看出唐廷收回诸藩非传统经济权力的努力。作为东南地区的中心城市,在经济重心南移的大背景下,扬州是唐廷和诸藩争夺经济资源的重要场域,也成为唐廷重点建设的地区。作为唐后期中国最大的商业都会之一,扬州出现来自宫廷的瓷器,具有其合理性。

Comparative analyses of leaf anatomy of dicotyledonous species in Tibetan and Inner Mongolian grasslands

Knowledge of the leaf anatomy of grassland plants is crucial for understanding how these plants adapt to the environment. Tibetan alpine grasslands and Inner Mongolian temperate grasslands are two major grassland types in northern China. Tibetan alpine grasslands occur in high-altitude regions where the low temperatures limit plant growth. Inner Mongolian temperate grasslands are found in arid regions where moisture is the limiting factor. Few comparative studies concerning the leaf anatomy of grassland plants of the Tibetan Plateau and Inner Mongolian Plateau have been conducted. We examined leaf characteristics at 71 sites and among 65 species, across the alpine grasslands of the Tibetan Plateau and the temperate grasslands of the Inner Mongolian Plateau. We compared the leaf structures of plants with different life forms and taxonomies, and their adaptation to arid or cold environments. We explored relationships among leaf features and the effects of climatic factors (i.e., growing season temperature and precipitation) on leaf characteristics. Our results showed that (i) there were significant differences in leaf anatomy between Tibetan alpine and Inner Mongolian temperate grasslands. Except for mesophyll cell density, the values obtained for thickness of leaf tissue, surface area and volume of mesophyll cells were larger on the Tibetan Plateau than on the Inner Mongolian Plateau. (ii) Within the same family or genus, leaf anatomy showed significant differences between two regions, and trends were consistent with those of whole species. (iii) Leaf anatomy of woody and herbaceous plants also showed significant differences between the regions. Except for mesophyll cell density, the values obtained for the thickness of leaf tissue, and the surface area and volume of mesophyll cells were larger in herbaceous than in woody plants. (iv) Leaf anatomical traits changed accordingly. Total leaf thickness, thicknesses of lower and upper epidermal cells, and surface area and volume of mesophyll cells were positively correlated, while mesophyll cell density was negatively associated with those traits. (v) Growing season temperature had stronger effects on leaf anatomy than growing season precipitation. Although the communities in Tibetan and Inner Mongolian grasslands were similar in appearance, leaf anatomy differed; this was probably due to the combined effects of evolutionary adaptation of plants to environment and environmental stress induced by climatic factors.

绍兴御府印的形态学研究

本文借用考古类型学方法,对南宋高宗时期内府收藏印――绍兴印进行了形态学研究,辨识了"绍兴"连珠印、"希世藏"印、"内府书印"印及"睿思东阁"印的印文形态,分析了单印、二印、三印及多印的绍兴印组合的特点,探究了各印钤盖的标准位与非常位,从而初步确认了绍兴御府印在印文、组合、位置等方面的一些基本格式。以这个基本格式为参照,作者讨论了混杂在绍兴御府印中一些"问题印"的真伪。又通过与周密《思陵书画记》比照,发现该书有关绍兴御府印格式的最原始记载与传世品上的绍兴印实迹之间的差异甚大,从而进一步追问,周氏所言到底道出了绍兴御府印的几多实情,流传到今天的古代书画上的绍兴御府印又具有多大程度的历史真实性?

Therapeutic observation of needle embedding for constipation after thoracolumbar vertebral fracture

Objective： To observe the clinical efficacy of point needle embedding in treating constipation after thoracolumbar vertebral fracture. Methods： By random number table based on the admission sequence, 85 patients with constipation after thoracolumbar vertebral fracture were randomized into an observation group of 43 cases and a control group of 42 cases. The observation group was intervened by point needle embedding with intradermal needles, while the control group was by point application with Chinese medication. The clinical efficacies were compared between the two groups after intervention. Results： After treatment, the initial defecation time and bowel movement condition were compared. Despite the residual feeling in the initial defecation, the initial defecation time and bowel movements of the observation group were significantly superior to those of the control group （P〈0.05, P〈0.01）; the total effective rate was 90.7% in the observation group versus 73.8% in the control group, and the difference was statistically significant （P〈0.05）. Conclusion： Point needle embedding can produce a better therapeutic efficacy than Chinese medicinal application in treating constipation after thoracolumbar vertebral fracture; besides, it＇s easy-to-operate.

Effects of intradermal needle therapy plus pinaverium bromide on gastrointestinal hormone levels in irritable bowel syndrome-diarrhea patients

Objective:To observe the clinical efficacy difference in treating irritable bowel syndrome-diarrhea(IBS-D)of liver-qi stagnation and spleen-deficiency pattern with different treatment protocols,and the effects on serum levels of 5-hydroxytryptamine(5-HT),substance P(SP)and vasoactive intestinal peptide(VIP),for unveiling the mechanism of intradermal needle therapy plus pinaverium bromide in treating IBS-D.Methods:A total of 123 IBS-D patients were divided into an observation group,a Western medication group and an integrated Western and Chinese medication group using the random number table method,with 41 cases in each group.The Western medication group was given oral pinaverium bromide,50 mg each time and 3 times a day.The integrated Western and Chinese medication group was given additional Chinese herbal medicine Tong Xie Yao Fang,one dose each day.The observation group was given additional intradermal needle therapy on the basis of the Western medication group.The whole intervention lasted for 6 weeks.Before and after treatment,the scores of gastrointestinal symptoms,traditional Chinese medicine(TCM)symptoms,irritable bowel syndrome(IBS)symptom severity scale(IBS-SSS)and IBS quality of life(IBS-QOL)questionnaire,as well as the serum levels of 5-HT,SP and VIP were observed.The clinical efficacy was estimated.Results:The total effective rate was 92.7%in the observation group,68.3%in the Western medication group and 78.1%in the integrated Western and Chinese medication group.The total effective rate was higher in the observation group than in the other two groups,and higher in the integrated Western and Chinese medication group than in the Western medication group,showing statistical significance(all P<0.05).After treatment,the scores of gastrointestinal symptoms,TCM symptoms and IBS-SSS showed significant decreases in the three groups,presenting statistical significance compared with the baseline(all P<0.05);the scores of gastrointestinal symptoms,TCM symptoms and IBS-SSS were notably lower in the observation group than in the other two groups(all P<0.05),and lower in the integrated Western and Chinese medication group than in the Western medication group(all P<0.05).After treatment,the eight component scores of IBS-QOL showed significant increases in the three groups compared with the baseline(all P<0.05);the eight component scores in IBS-QOL were significantly higher in the observation group than in the other two groups(all P<0.05),and higher in the integrated Western and Chinese medication group than in the Western medication group(all P<0.05).After treatment,the serum levels of 5-HT,SP and VIP decreased markedly in the three groups compared with the baseline(all P<0.05);the serum levels of 5-HT,SP and VIP were significantly lower in the observation group than in the other two groups(all P<0.05),and lower in the integrated Western and Chinese medication group than in the Western medication group(P<0.05).Conclusion:Treatment with intradermal needle therapy plus pinaverium bromide results in significant improvements in the gastrointestinal symptoms and quality of life in patients with IBS-D of liver-qi stagnation and spleen deficiency pattern,and effectively regulates the gastrointestinal hormone production.

Clinical study on intradermal needle therapy in treating urinary retention after cervical cancer surgery

Objective:To observe the clinical efficacy of intradermal needle therapy for urinary retention after cervical cancer surgery.Methods:A total of 100 patients with urinary retention after cervical cancer surgery were randomized into a control group and an observation group,with 50 cases in each group.The control group was treated with basic nursing only,and the observation group was treated with additional intradermal needle therapy.Both groups were treated for 2 courses of treatment.The main symptom scores and residual urine volume of the two groups were observed before and after treatment,and the inpatient time,catheter indwelling time and the clinical efficacy were compared between the two groups.Results:The total effective rate was 96.0%in the observation group and 88.0% in the control group,and the difference between the two groups was statistically significant(P<0.05).After treatment,the main symptom scores and residual urine volume in both groups decreased significantly(all P<0.0S),and the scores and residual urine volume in the observation group were significantly lower than those in the control group(all P<0.05).The inpatient time and catheter indwelling time in the observation group were significantly shorter than those in the control group(both P<0.05).Conclusion:Intradermal needle therapy has an obvious effect in improving symptoms of urinary retention after cervical cancer surgery,and the effect is significantly more persistent than that of simple basic nursing.

Changes in inland lakes on the Tibetan Plateau over the past 40 years

Inland lakes and alpine glaciers are important water resources on the Tibetan Plateau. Understanding their variation is crucial for accurate evaluation and prediction of changes in water supply and for retrieval and analysis of climatic information. Data from previous research on 35 alpine lakes on the Tibetan Plateau were used to investigate changes in lake water level and area. In terms of temporal changes, the area of the 35 alpine lakes could be divided into five groups: rising, falling-rising, rising-falling, fluctuating, and falling. In terms of spatial changes, the area of alpine lakes in the Himalayan Mountains, the Karakoram Mountains, and the Qaidam Basin tended to decrease; the area of lakes in the Naqu region and the Kunlun Mountains increased; and the area of lakes in the Hoh Xil region and Qilian Mountains fluctuated. Changes in lake water level and area were correlated with regional changes in climate. Reasons for changes in these lakes on the Tibetan Plateau were analyzed, including precipitation and evaporation from meteorological data, glacier meltwater from the Chinese glacier inventories. Several key problems, e.g. challenges of monitoring water balance, limitations to glacial area detection, uncertainties in detecting lake water-level variations and variable region boundaries of lake change types on the Tibetan Plateau were discussed. This research has most indicative significance to regional climate change.

Intradermal Needle Therapy and Its Application in Treating Gastric Diseases

Intradermal needle therapy is a kind of therapy by embedding specially-made short needles in the points for long time retaining.It is also known as needleembedding therapy,develops from the ancient method of needle retaining [1].

Open Sesame: treasure in store-operated calcium entry pathway for cancer therapy

Store-operated Ca2+ entry(SOCE) controls intracellular Ca2+ homeostasis and regulates a wide range of cellular events including proliferation,migration and invasion.The discovery of STIM proteins as Ca2+ sensors and Orai proteins as Ca2+ channel pore forming units provided molecular tools to understand the physiological function of SOCE.Many studies have revealed the pathophysiological roles of Orai and STIM in tumor cells.This review focuses on recent advances in SOCE and its contribution to tumorigenesis.Altered Orai and/or STIM functions may serve as biomarkers for cancer prognosis,and targeting the SOCE pathway may provide a novel means for cancer treatment.

Geochemical studies on the source region of Asian dust

The North China and the neighbouring Mongolia in Asian Interior is characterized by extremely dry climate, resulted in one of the world＇s major dust emission centres. Deciphering the source region of Asian dust is critical for revealing the mechanism of the dust production, interpreting the paleo-environrnental records of eolian deposits, predicting the overall environmental effects of dust, and setting the strategies for the control of contemporary dust storms. This paper summarizes the geochemical methods applied to the source tracing of Asian dust. Nd-Sr isotopes were the most extensively studied source tracer of Asian dust and have been successfully applied in many cases. Geochemistry of detrital monomineral shows great theoretical advantages in source tracing and deserves further studies. The short-range transportation of Chinese loess with direction similar to that of the prevailing near surface wind is revealed. Source tracing also shows that the Asian dust has two ultimate material sources from the northern margin of the Tibetan Plateau and the Central Asian Orogen, which confirms the importance of mountain processes in the production of silt eolian particles. Based on the recent progresses on the source tracing of Asian dust, discussions are expanded on the natural background of Asian dust storms and potential anthropogenic influence, the materials evolution of the source regions of Asian dust and its relationships with climate changes and Tibetan uplift, and the role of Tibetan uplift in the Asian dust system.